bellard | 5493600 | 2003-05-13 00:25:15 +0000 | [diff] [blame] | 1 | /* |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 2 | * Virtual page mapping |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 3 | * |
bellard | 5493600 | 2003-05-13 00:25:15 +0000 | [diff] [blame] | 4 | * Copyright (c) 2003 Fabrice Bellard |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This library is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
Blue Swirl | 8167ee8 | 2009-07-16 20:47:01 +0000 | [diff] [blame] | 17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
bellard | 5493600 | 2003-05-13 00:25:15 +0000 | [diff] [blame] | 18 | */ |
Peter Maydell | 7b31bbc | 2016-01-26 18:16:56 +0000 | [diff] [blame] | 19 | #include "qemu/osdep.h" |
Markus Armbruster | da34e65 | 2016-03-14 09:01:28 +0100 | [diff] [blame] | 20 | #include "qapi/error.h" |
bellard | 5493600 | 2003-05-13 00:25:15 +0000 | [diff] [blame] | 21 | |
Lingfeng Yang | cda0ba9 | 2018-08-15 14:58:15 -0700 | [diff] [blame] | 22 | #include "qemu/abort.h" |
Veronia Bahaa | f348b6d | 2016-03-20 19:16:19 +0200 | [diff] [blame] | 23 | #include "qemu/cutils.h" |
bellard | 6180a18 | 2003-09-30 21:04:53 +0000 | [diff] [blame] | 24 | #include "cpu.h" |
Paolo Bonzini | 63c9155 | 2016-03-15 13:18:37 +0100 | [diff] [blame] | 25 | #include "exec/exec-all.h" |
Juan Quintela | 5118042 | 2017-04-24 20:50:19 +0200 | [diff] [blame] | 26 | #include "exec/target_page.h" |
bellard | b67d9a5 | 2008-05-23 09:57:34 +0000 | [diff] [blame] | 27 | #include "tcg.h" |
Paolo Bonzini | 741da0d | 2014-06-27 08:40:04 +0200 | [diff] [blame] | 28 | #include "hw/qdev-core.h" |
Fam Zheng | c7e002c | 2017-07-14 10:15:08 +0800 | [diff] [blame] | 29 | #include "hw/qdev-properties.h" |
Michael S. Tsirkin | 4485bd2 | 2015-03-11 07:56:34 +0100 | [diff] [blame] | 30 | #if !defined(CONFIG_USER_ONLY) |
Marcel Apfelbaum | 47c8ca5 | 2015-02-04 17:43:54 +0200 | [diff] [blame] | 31 | #include "hw/boards.h" |
Paolo Bonzini | 33c1187 | 2016-03-15 16:58:45 +0100 | [diff] [blame] | 32 | #include "hw/xen/xen.h" |
Michael S. Tsirkin | 4485bd2 | 2015-03-11 07:56:34 +0100 | [diff] [blame] | 33 | #endif |
Paolo Bonzini | 9c17d61 | 2012-12-17 18:20:04 +0100 | [diff] [blame] | 34 | #include "sysemu/kvm.h" |
Markus Armbruster | 2ff3de6 | 2013-07-04 15:09:22 +0200 | [diff] [blame] | 35 | #include "sysemu/sysemu.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 36 | #include "qemu/timer.h" |
| 37 | #include "qemu/config-file.h" |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 38 | #include "qemu/error-report.h" |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 39 | #if defined(CONFIG_USER_ONLY) |
Markus Armbruster | a9c9427 | 2016-06-22 19:11:19 +0200 | [diff] [blame] | 40 | #include "qemu.h" |
Jun Nakajima | 432d268 | 2010-08-31 16:41:25 +0100 | [diff] [blame] | 41 | #else /* !CONFIG_USER_ONLY */ |
Paolo Bonzini | 741da0d | 2014-06-27 08:40:04 +0200 | [diff] [blame] | 42 | #include "hw/hw.h" |
| 43 | #include "exec/memory.h" |
Lingfeng Yang | cda0ba9 | 2018-08-15 14:58:15 -0700 | [diff] [blame] | 44 | #include "exec/memory-remap.h" |
Paolo Bonzini | df43d49 | 2016-03-16 10:24:54 +0100 | [diff] [blame] | 45 | #include "exec/ioport.h" |
Paolo Bonzini | 741da0d | 2014-06-27 08:40:04 +0200 | [diff] [blame] | 46 | #include "sysemu/dma.h" |
Alexey Kardashevskiy | 9c60766 | 2017-03-02 13:36:11 +1100 | [diff] [blame] | 47 | #include "sysemu/numa.h" |
Christian Borntraeger | 79ca7a1 | 2017-03-07 15:19:08 +0100 | [diff] [blame] | 48 | #include "sysemu/hw_accel.h" |
Paolo Bonzini | 741da0d | 2014-06-27 08:40:04 +0200 | [diff] [blame] | 49 | #include "exec/address-spaces.h" |
Paolo Bonzini | 9c17d61 | 2012-12-17 18:20:04 +0100 | [diff] [blame] | 50 | #include "sysemu/xen-mapcache.h" |
Daniel P. Berrange | 0ab8ed1 | 2017-01-25 16:14:15 +0000 | [diff] [blame] | 51 | #include "trace-root.h" |
Dr. David Alan Gilbert | d3a5038 | 2017-02-24 18:28:32 +0000 | [diff] [blame] | 52 | |
Dr. David Alan Gilbert | e2fa71f | 2017-02-24 18:28:33 +0000 | [diff] [blame] | 53 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE |
Dr. David Alan Gilbert | e2fa71f | 2017-02-24 18:28:33 +0000 | [diff] [blame] | 54 | #include <linux/falloc.h> |
| 55 | #endif |
| 56 | |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 57 | #endif |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 58 | #include "qemu/rcu_queue.h" |
Jan Kiszka | 4840f10 | 2015-06-18 18:47:22 +0200 | [diff] [blame] | 59 | #include "qemu/main-loop.h" |
Erwin Jansen | ec22dc9 | 2018-07-24 10:32:25 -0700 | [diff] [blame] | 60 | #include "accel/tcg/translate-all.h" |
Pavel Dovgalyuk | 7615936 | 2015-09-17 19:25:07 +0300 | [diff] [blame] | 61 | #include "sysemu/replay.h" |
Blue Swirl | 0cac1b6 | 2012-04-09 16:50:52 +0000 | [diff] [blame] | 62 | |
Paolo Bonzini | 022c62c | 2012-12-17 18:19:49 +0100 | [diff] [blame] | 63 | #include "exec/memory-internal.h" |
Juan Quintela | 220c3eb | 2013-10-14 17:13:59 +0200 | [diff] [blame] | 64 | #include "exec/ram_addr.h" |
Paolo Bonzini | 508127e | 2016-01-07 16:55:28 +0300 | [diff] [blame] | 65 | #include "exec/log.h" |
Avi Kivity | 67d95c1 | 2011-12-15 15:25:22 +0200 | [diff] [blame] | 66 | |
Bharata B Rao | 9dfeca7 | 2016-05-12 09:18:12 +0530 | [diff] [blame] | 67 | #include "migration/vmstate.h" |
| 68 | |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 69 | #include "qemu/range.h" |
Michael S. Tsirkin | 794e8f3 | 2015-09-24 14:41:17 +0300 | [diff] [blame] | 70 | #include "qemu/mmap-alloc.h" |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 71 | |
Peter Xu | be9b23c | 2017-05-12 12:17:41 +0800 | [diff] [blame] | 72 | #include "monitor/monitor.h" |
| 73 | |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 74 | //#define DEBUG_SUBPAGE |
ths | 1196be3 | 2007-03-17 15:17:58 +0000 | [diff] [blame] | 75 | |
Lingfeng Yang | 4e37b73 | 2018-09-17 13:42:57 -0700 | [diff] [blame] | 76 | #define FLATVIEW_UNUSUAL_ITER_COUNT 128 |
| 77 | |
pbrook | 99773bd | 2006-04-16 15:14:59 +0000 | [diff] [blame] | 78 | #if !defined(CONFIG_USER_ONLY) |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 79 | /* ram_list is read under rcu_read_lock()/rcu_read_unlock(). Writes |
| 80 | * are protected by the ramlist lock. |
| 81 | */ |
Mike Day | 0d53d9f | 2015-01-21 13:45:24 +0100 | [diff] [blame] | 82 | RAMList ram_list = { .blocks = QLIST_HEAD_INITIALIZER(ram_list.blocks) }; |
Avi Kivity | 62152b8 | 2011-07-26 14:26:14 +0300 | [diff] [blame] | 83 | |
| 84 | static MemoryRegion *system_memory; |
Avi Kivity | 309cb47 | 2011-08-08 16:09:03 +0300 | [diff] [blame] | 85 | static MemoryRegion *system_io; |
Avi Kivity | 62152b8 | 2011-07-26 14:26:14 +0300 | [diff] [blame] | 86 | |
Avi Kivity | f6790af | 2012-10-02 20:13:51 +0200 | [diff] [blame] | 87 | AddressSpace address_space_io; |
| 88 | AddressSpace address_space_memory; |
Avi Kivity | 2673a5d | 2012-10-02 18:49:28 +0200 | [diff] [blame] | 89 | |
Paolo Bonzini | 0844e00 | 2013-05-24 14:37:28 +0200 | [diff] [blame] | 90 | MemoryRegion io_mem_rom, io_mem_notdirty; |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 91 | static MemoryRegion io_mem_unassigned; |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 92 | |
Lingfeng Yang | 6241395 | 2018-12-14 09:07:53 -0800 | [diff] [blame] | 93 | static bool ram_blocks_exiting = false; |
| 94 | |
Paolo Bonzini | 7bd4f43 | 2014-05-14 17:43:22 +0800 | [diff] [blame] | 95 | /* RAM is pre-allocated and passed into qemu_ram_alloc_from_ptr */ |
| 96 | #define RAM_PREALLOC (1 << 0) |
| 97 | |
Paolo Bonzini | dbcb898 | 2014-06-10 19:15:24 +0800 | [diff] [blame] | 98 | /* RAM is mmap-ed with MAP_SHARED */ |
| 99 | #define RAM_SHARED (1 << 1) |
| 100 | |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 101 | /* Only a portion of RAM (used_length) is actually used, and migrated. |
| 102 | * This used_length size can change across reboots. |
| 103 | */ |
| 104 | #define RAM_RESIZEABLE (1 << 2) |
| 105 | |
Lingfeng Yang | 38aa929 | 2018-08-06 07:30:39 -0700 | [diff] [blame] | 106 | /* RAM is a mapped file */ |
| 107 | #define RAM_MAPPED (1 << 3) |
| 108 | |
Lingfeng Yang | 2686e6d | 2018-11-07 07:50:15 -0800 | [diff] [blame] | 109 | /* RAM backing is managed by user */ |
| 110 | #define RAM_USER_BACKED (1 << 4) |
| 111 | |
Dr. David Alan Gilbert | 2ce1664 | 2018-03-12 17:20:58 +0000 | [diff] [blame] | 112 | /* UFFDIO_ZEROPAGE is available on this RAMBlock to atomically |
| 113 | * zero the page and wake waiting processes. |
| 114 | * (Set during postcopy) |
| 115 | */ |
| 116 | #define RAM_UF_ZEROPAGE (1 << 3) |
pbrook | e2eef17 | 2008-06-08 01:09:01 +0000 | [diff] [blame] | 117 | #endif |
bellard | 9fa3e85 | 2004-01-04 18:06:42 +0000 | [diff] [blame] | 118 | |
Peter Maydell | 20bccb8 | 2016-10-24 16:26:49 +0100 | [diff] [blame] | 119 | #ifdef TARGET_PAGE_BITS_VARY |
| 120 | int target_page_bits; |
| 121 | bool target_page_bits_decided; |
| 122 | #endif |
| 123 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 124 | struct CPUTailQ cpus = QTAILQ_HEAD_INITIALIZER(cpus); |
bellard | 6a00d60 | 2005-11-21 23:25:50 +0000 | [diff] [blame] | 125 | /* current CPU in the current thread. It is only valid inside |
| 126 | cpu_exec() */ |
Paolo Bonzini | f240eb6 | 2015-08-26 00:17:58 +0200 | [diff] [blame] | 127 | __thread CPUState *current_cpu; |
pbrook | 2e70f6e | 2008-06-29 01:03:05 +0000 | [diff] [blame] | 128 | /* 0 = Do not count executed instructions. |
ths | bf20dc0 | 2008-06-30 17:22:19 +0000 | [diff] [blame] | 129 | 1 = Precise instruction counting. |
pbrook | 2e70f6e | 2008-06-29 01:03:05 +0000 | [diff] [blame] | 130 | 2 = Adaptive rate instruction counting. */ |
Paolo Bonzini | 5708fc6 | 2012-11-26 15:36:40 +0100 | [diff] [blame] | 131 | int use_icount; |
bellard | 6a00d60 | 2005-11-21 23:25:50 +0000 | [diff] [blame] | 132 | |
Yang Zhong | a0be0c5 | 2017-07-03 18:12:13 +0800 | [diff] [blame] | 133 | uintptr_t qemu_host_page_size; |
| 134 | intptr_t qemu_host_page_mask; |
Yang Zhong | a0be0c5 | 2017-07-03 18:12:13 +0800 | [diff] [blame] | 135 | |
Peter Maydell | 20bccb8 | 2016-10-24 16:26:49 +0100 | [diff] [blame] | 136 | bool set_preferred_target_page_bits(int bits) |
| 137 | { |
| 138 | /* The target page size is the lowest common denominator for all |
| 139 | * the CPUs in the system, so we can only make it smaller, never |
| 140 | * larger. And we can't make it smaller once we've committed to |
| 141 | * a particular size. |
| 142 | */ |
| 143 | #ifdef TARGET_PAGE_BITS_VARY |
| 144 | assert(bits >= TARGET_PAGE_BITS_MIN); |
| 145 | if (target_page_bits == 0 || target_page_bits > bits) { |
| 146 | if (target_page_bits_decided) { |
| 147 | return false; |
| 148 | } |
| 149 | target_page_bits = bits; |
| 150 | } |
| 151 | #endif |
| 152 | return true; |
| 153 | } |
| 154 | |
pbrook | e2eef17 | 2008-06-08 01:09:01 +0000 | [diff] [blame] | 155 | #if !defined(CONFIG_USER_ONLY) |
Avi Kivity | 4346ae3 | 2012-02-10 17:00:01 +0200 | [diff] [blame] | 156 | |
Peter Maydell | 20bccb8 | 2016-10-24 16:26:49 +0100 | [diff] [blame] | 157 | static void finalize_target_page_bits(void) |
| 158 | { |
| 159 | #ifdef TARGET_PAGE_BITS_VARY |
| 160 | if (target_page_bits == 0) { |
| 161 | target_page_bits = TARGET_PAGE_BITS_MIN; |
| 162 | } |
| 163 | target_page_bits_decided = true; |
| 164 | #endif |
| 165 | } |
| 166 | |
Paolo Bonzini | 1db8abb | 2013-05-21 12:07:21 +0200 | [diff] [blame] | 167 | typedef struct PhysPageEntry PhysPageEntry; |
| 168 | |
| 169 | struct PhysPageEntry { |
Michael S. Tsirkin | 9736e55 | 2013-11-11 14:42:43 +0200 | [diff] [blame] | 170 | /* How many bits skip to next level (in units of L2_SIZE). 0 for a leaf. */ |
Michael S. Tsirkin | 8b79576 | 2013-11-11 14:51:56 +0200 | [diff] [blame] | 171 | uint32_t skip : 6; |
Michael S. Tsirkin | 9736e55 | 2013-11-11 14:42:43 +0200 | [diff] [blame] | 172 | /* index into phys_sections (!skip) or phys_map_nodes (skip) */ |
Michael S. Tsirkin | 8b79576 | 2013-11-11 14:51:56 +0200 | [diff] [blame] | 173 | uint32_t ptr : 26; |
Paolo Bonzini | 1db8abb | 2013-05-21 12:07:21 +0200 | [diff] [blame] | 174 | }; |
| 175 | |
Michael S. Tsirkin | 8b79576 | 2013-11-11 14:51:56 +0200 | [diff] [blame] | 176 | #define PHYS_MAP_NODE_NIL (((uint32_t)~0) >> 6) |
| 177 | |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 178 | /* Size of the L2 (and L3, etc) page tables. */ |
Paolo Bonzini | 57271d6 | 2013-11-07 17:14:37 +0100 | [diff] [blame] | 179 | #define ADDR_SPACE_BITS 64 |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 180 | |
Michael S. Tsirkin | 026736c | 2013-11-13 20:13:03 +0200 | [diff] [blame] | 181 | #define P_L2_BITS 9 |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 182 | #define P_L2_SIZE (1 << P_L2_BITS) |
| 183 | |
| 184 | #define P_L2_LEVELS (((ADDR_SPACE_BITS - TARGET_PAGE_BITS - 1) / P_L2_BITS) + 1) |
| 185 | |
| 186 | typedef PhysPageEntry Node[P_L2_SIZE]; |
Paolo Bonzini | 0475d94 | 2013-05-29 12:28:21 +0200 | [diff] [blame] | 187 | |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 188 | typedef struct PhysPageMap { |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 189 | struct rcu_head rcu; |
| 190 | |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 191 | unsigned sections_nb; |
| 192 | unsigned sections_nb_alloc; |
| 193 | unsigned nodes_nb; |
| 194 | unsigned nodes_nb_alloc; |
| 195 | Node *nodes; |
| 196 | MemoryRegionSection *sections; |
| 197 | } PhysPageMap; |
| 198 | |
Paolo Bonzini | 1db8abb | 2013-05-21 12:07:21 +0200 | [diff] [blame] | 199 | struct AddressSpaceDispatch { |
Fam Zheng | 729633c | 2016-03-01 14:18:24 +0800 | [diff] [blame] | 200 | MemoryRegionSection *mru_section; |
Paolo Bonzini | 1db8abb | 2013-05-21 12:07:21 +0200 | [diff] [blame] | 201 | /* This is a multi-level map on the physical address space. |
| 202 | * The bottom level has pointers to MemoryRegionSections. |
| 203 | */ |
| 204 | PhysPageEntry phys_map; |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 205 | PhysPageMap map; |
Paolo Bonzini | 1db8abb | 2013-05-21 12:07:21 +0200 | [diff] [blame] | 206 | }; |
| 207 | |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 208 | #define SUBPAGE_IDX(addr) ((addr) & ~TARGET_PAGE_MASK) |
| 209 | typedef struct subpage_t { |
| 210 | MemoryRegion iomem; |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 211 | FlatView *fv; |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 212 | hwaddr base; |
Vijaya Kumar K | 2615fab | 2016-10-24 16:26:49 +0100 | [diff] [blame] | 213 | uint16_t sub_section[]; |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 214 | } subpage_t; |
| 215 | |
Liu Ping Fan | b41aac4 | 2013-05-29 11:09:17 +0200 | [diff] [blame] | 216 | #define PHYS_SECTION_UNASSIGNED 0 |
| 217 | #define PHYS_SECTION_NOTDIRTY 1 |
| 218 | #define PHYS_SECTION_ROM 2 |
| 219 | #define PHYS_SECTION_WATCH 3 |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 220 | |
pbrook | e2eef17 | 2008-06-08 01:09:01 +0000 | [diff] [blame] | 221 | static void io_mem_init(void); |
Avi Kivity | 62152b8 | 2011-07-26 14:26:14 +0300 | [diff] [blame] | 222 | static void memory_map_init(void); |
Edgar E. Iglesias | 09daed8 | 2013-12-17 13:06:51 +1000 | [diff] [blame] | 223 | static void tcg_commit(MemoryListener *listener); |
pbrook | e2eef17 | 2008-06-08 01:09:01 +0000 | [diff] [blame] | 224 | |
Avi Kivity | 1ec9b90 | 2012-01-02 12:47:48 +0200 | [diff] [blame] | 225 | static MemoryRegion io_mem_watch; |
Peter Maydell | 32857f4 | 2015-10-01 15:29:50 +0100 | [diff] [blame] | 226 | |
| 227 | /** |
| 228 | * CPUAddressSpace: all the information a CPU needs about an AddressSpace |
| 229 | * @cpu: the CPU whose AddressSpace this is |
| 230 | * @as: the AddressSpace itself |
| 231 | * @memory_dispatch: its dispatch pointer (cached, RCU protected) |
| 232 | * @tcg_as_listener: listener for tracking changes to the AddressSpace |
| 233 | */ |
| 234 | struct CPUAddressSpace { |
| 235 | CPUState *cpu; |
| 236 | AddressSpace *as; |
| 237 | struct AddressSpaceDispatch *memory_dispatch; |
| 238 | MemoryListener tcg_as_listener; |
| 239 | }; |
| 240 | |
Gerd Hoffmann | 8deaf12 | 2017-04-21 11:16:25 +0200 | [diff] [blame] | 241 | struct DirtyBitmapSnapshot { |
| 242 | ram_addr_t start; |
| 243 | ram_addr_t end; |
| 244 | unsigned long dirty[]; |
| 245 | }; |
| 246 | |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 247 | #endif |
bellard | 5493600 | 2003-05-13 00:25:15 +0000 | [diff] [blame] | 248 | |
Paul Brook | 6d9a130 | 2010-02-28 23:55:53 +0000 | [diff] [blame] | 249 | #if !defined(CONFIG_USER_ONLY) |
Avi Kivity | d6f2ea2 | 2012-02-12 20:12:49 +0200 | [diff] [blame] | 250 | |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 251 | static void phys_map_node_reserve(PhysPageMap *map, unsigned nodes) |
Avi Kivity | f7bf546 | 2012-02-13 20:12:05 +0200 | [diff] [blame] | 252 | { |
Peter Lieven | 101420b | 2016-07-15 12:03:50 +0200 | [diff] [blame] | 253 | static unsigned alloc_hint = 16; |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 254 | if (map->nodes_nb + nodes > map->nodes_nb_alloc) { |
Peter Lieven | 101420b | 2016-07-15 12:03:50 +0200 | [diff] [blame] | 255 | map->nodes_nb_alloc = MAX(map->nodes_nb_alloc, alloc_hint); |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 256 | map->nodes_nb_alloc = MAX(map->nodes_nb_alloc, map->nodes_nb + nodes); |
| 257 | map->nodes = g_renew(Node, map->nodes, map->nodes_nb_alloc); |
Peter Lieven | 101420b | 2016-07-15 12:03:50 +0200 | [diff] [blame] | 258 | alloc_hint = map->nodes_nb_alloc; |
Avi Kivity | f7bf546 | 2012-02-13 20:12:05 +0200 | [diff] [blame] | 259 | } |
| 260 | } |
| 261 | |
Paolo Bonzini | db94604 | 2015-05-21 15:12:29 +0200 | [diff] [blame] | 262 | static uint32_t phys_map_node_alloc(PhysPageMap *map, bool leaf) |
Avi Kivity | d6f2ea2 | 2012-02-12 20:12:49 +0200 | [diff] [blame] | 263 | { |
| 264 | unsigned i; |
Michael S. Tsirkin | 8b79576 | 2013-11-11 14:51:56 +0200 | [diff] [blame] | 265 | uint32_t ret; |
Paolo Bonzini | db94604 | 2015-05-21 15:12:29 +0200 | [diff] [blame] | 266 | PhysPageEntry e; |
| 267 | PhysPageEntry *p; |
Avi Kivity | d6f2ea2 | 2012-02-12 20:12:49 +0200 | [diff] [blame] | 268 | |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 269 | ret = map->nodes_nb++; |
Paolo Bonzini | db94604 | 2015-05-21 15:12:29 +0200 | [diff] [blame] | 270 | p = map->nodes[ret]; |
Avi Kivity | d6f2ea2 | 2012-02-12 20:12:49 +0200 | [diff] [blame] | 271 | assert(ret != PHYS_MAP_NODE_NIL); |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 272 | assert(ret != map->nodes_nb_alloc); |
Paolo Bonzini | db94604 | 2015-05-21 15:12:29 +0200 | [diff] [blame] | 273 | |
| 274 | e.skip = leaf ? 0 : 1; |
| 275 | e.ptr = leaf ? PHYS_SECTION_UNASSIGNED : PHYS_MAP_NODE_NIL; |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 276 | for (i = 0; i < P_L2_SIZE; ++i) { |
Paolo Bonzini | db94604 | 2015-05-21 15:12:29 +0200 | [diff] [blame] | 277 | memcpy(&p[i], &e, sizeof(e)); |
Avi Kivity | d6f2ea2 | 2012-02-12 20:12:49 +0200 | [diff] [blame] | 278 | } |
Avi Kivity | f7bf546 | 2012-02-13 20:12:05 +0200 | [diff] [blame] | 279 | return ret; |
Avi Kivity | d6f2ea2 | 2012-02-12 20:12:49 +0200 | [diff] [blame] | 280 | } |
| 281 | |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 282 | static void phys_page_set_level(PhysPageMap *map, PhysPageEntry *lp, |
| 283 | hwaddr *index, hwaddr *nb, uint16_t leaf, |
Avi Kivity | 2999097 | 2012-02-13 20:21:20 +0200 | [diff] [blame] | 284 | int level) |
Avi Kivity | f7bf546 | 2012-02-13 20:12:05 +0200 | [diff] [blame] | 285 | { |
| 286 | PhysPageEntry *p; |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 287 | hwaddr step = (hwaddr)1 << (level * P_L2_BITS); |
Avi Kivity | f7bf546 | 2012-02-13 20:12:05 +0200 | [diff] [blame] | 288 | |
Michael S. Tsirkin | 9736e55 | 2013-11-11 14:42:43 +0200 | [diff] [blame] | 289 | if (lp->skip && lp->ptr == PHYS_MAP_NODE_NIL) { |
Paolo Bonzini | db94604 | 2015-05-21 15:12:29 +0200 | [diff] [blame] | 290 | lp->ptr = phys_map_node_alloc(map, level == 0); |
Avi Kivity | f7bf546 | 2012-02-13 20:12:05 +0200 | [diff] [blame] | 291 | } |
Paolo Bonzini | db94604 | 2015-05-21 15:12:29 +0200 | [diff] [blame] | 292 | p = map->nodes[lp->ptr]; |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 293 | lp = &p[(*index >> (level * P_L2_BITS)) & (P_L2_SIZE - 1)]; |
Avi Kivity | f7bf546 | 2012-02-13 20:12:05 +0200 | [diff] [blame] | 294 | |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 295 | while (*nb && lp < &p[P_L2_SIZE]) { |
Avi Kivity | 07f07b3 | 2012-02-13 20:45:32 +0200 | [diff] [blame] | 296 | if ((*index & (step - 1)) == 0 && *nb >= step) { |
Michael S. Tsirkin | 9736e55 | 2013-11-11 14:42:43 +0200 | [diff] [blame] | 297 | lp->skip = 0; |
Avi Kivity | c19e880 | 2012-02-13 20:25:31 +0200 | [diff] [blame] | 298 | lp->ptr = leaf; |
Avi Kivity | 07f07b3 | 2012-02-13 20:45:32 +0200 | [diff] [blame] | 299 | *index += step; |
| 300 | *nb -= step; |
Avi Kivity | 2999097 | 2012-02-13 20:21:20 +0200 | [diff] [blame] | 301 | } else { |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 302 | phys_page_set_level(map, lp, index, nb, leaf, level - 1); |
Avi Kivity | 2999097 | 2012-02-13 20:21:20 +0200 | [diff] [blame] | 303 | } |
| 304 | ++lp; |
Avi Kivity | f7bf546 | 2012-02-13 20:12:05 +0200 | [diff] [blame] | 305 | } |
| 306 | } |
| 307 | |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 308 | static void phys_page_set(AddressSpaceDispatch *d, |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 309 | hwaddr index, hwaddr nb, |
Avi Kivity | 2999097 | 2012-02-13 20:21:20 +0200 | [diff] [blame] | 310 | uint16_t leaf) |
bellard | 92e873b | 2004-05-21 14:52:29 +0000 | [diff] [blame] | 311 | { |
Avi Kivity | 2999097 | 2012-02-13 20:21:20 +0200 | [diff] [blame] | 312 | /* Wildly overreserve - it doesn't matter much. */ |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 313 | phys_map_node_reserve(&d->map, 3 * P_L2_LEVELS); |
bellard | 92e873b | 2004-05-21 14:52:29 +0000 | [diff] [blame] | 314 | |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 315 | phys_page_set_level(&d->map, &d->phys_map, &index, &nb, leaf, P_L2_LEVELS - 1); |
bellard | 92e873b | 2004-05-21 14:52:29 +0000 | [diff] [blame] | 316 | } |
| 317 | |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 318 | /* Compact a non leaf page entry. Simply detect that the entry has a single child, |
| 319 | * and update our entry so we can skip it and go directly to the destination. |
| 320 | */ |
Marc-André Lureau | efee678 | 2016-09-28 16:37:20 +0400 | [diff] [blame] | 321 | static void phys_page_compact(PhysPageEntry *lp, Node *nodes) |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 322 | { |
| 323 | unsigned valid_ptr = P_L2_SIZE; |
| 324 | int valid = 0; |
| 325 | PhysPageEntry *p; |
| 326 | int i; |
| 327 | |
| 328 | if (lp->ptr == PHYS_MAP_NODE_NIL) { |
| 329 | return; |
| 330 | } |
| 331 | |
| 332 | p = nodes[lp->ptr]; |
| 333 | for (i = 0; i < P_L2_SIZE; i++) { |
| 334 | if (p[i].ptr == PHYS_MAP_NODE_NIL) { |
| 335 | continue; |
| 336 | } |
| 337 | |
| 338 | valid_ptr = i; |
| 339 | valid++; |
| 340 | if (p[i].skip) { |
Marc-André Lureau | efee678 | 2016-09-28 16:37:20 +0400 | [diff] [blame] | 341 | phys_page_compact(&p[i], nodes); |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 342 | } |
| 343 | } |
| 344 | |
| 345 | /* We can only compress if there's only one child. */ |
| 346 | if (valid != 1) { |
| 347 | return; |
| 348 | } |
| 349 | |
| 350 | assert(valid_ptr < P_L2_SIZE); |
| 351 | |
| 352 | /* Don't compress if it won't fit in the # of bits we have. */ |
| 353 | if (lp->skip + p[valid_ptr].skip >= (1 << 3)) { |
| 354 | return; |
| 355 | } |
| 356 | |
| 357 | lp->ptr = p[valid_ptr].ptr; |
| 358 | if (!p[valid_ptr].skip) { |
| 359 | /* If our only child is a leaf, make this a leaf. */ |
| 360 | /* By design, we should have made this node a leaf to begin with so we |
| 361 | * should never reach here. |
| 362 | * But since it's so simple to handle this, let's do it just in case we |
| 363 | * change this rule. |
| 364 | */ |
| 365 | lp->skip = 0; |
| 366 | } else { |
| 367 | lp->skip += p[valid_ptr].skip; |
| 368 | } |
| 369 | } |
| 370 | |
Alexey Kardashevskiy | 8629d3f | 2017-09-21 18:51:00 +1000 | [diff] [blame] | 371 | void address_space_dispatch_compact(AddressSpaceDispatch *d) |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 372 | { |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 373 | if (d->phys_map.skip) { |
Marc-André Lureau | efee678 | 2016-09-28 16:37:20 +0400 | [diff] [blame] | 374 | phys_page_compact(&d->phys_map, d->map.nodes); |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 375 | } |
| 376 | } |
| 377 | |
Fam Zheng | 29cb533 | 2016-03-01 14:18:23 +0800 | [diff] [blame] | 378 | static inline bool section_covers_addr(const MemoryRegionSection *section, |
| 379 | hwaddr addr) |
| 380 | { |
| 381 | /* Memory topology clips a memory region to [0, 2^64); size.hi > 0 means |
| 382 | * the section must cover the entire address space. |
| 383 | */ |
Richard Henderson | 258dfaa | 2016-06-29 15:48:03 -0700 | [diff] [blame] | 384 | return int128_gethi(section->size) || |
Fam Zheng | 29cb533 | 2016-03-01 14:18:23 +0800 | [diff] [blame] | 385 | range_covers_byte(section->offset_within_address_space, |
Richard Henderson | 258dfaa | 2016-06-29 15:48:03 -0700 | [diff] [blame] | 386 | int128_getlo(section->size), addr); |
Fam Zheng | 29cb533 | 2016-03-01 14:18:23 +0800 | [diff] [blame] | 387 | } |
| 388 | |
Peter Xu | 003a0cf | 2017-05-15 16:50:57 +0800 | [diff] [blame] | 389 | static MemoryRegionSection *phys_page_find(AddressSpaceDispatch *d, hwaddr addr) |
bellard | 92e873b | 2004-05-21 14:52:29 +0000 | [diff] [blame] | 390 | { |
Peter Xu | 003a0cf | 2017-05-15 16:50:57 +0800 | [diff] [blame] | 391 | PhysPageEntry lp = d->phys_map, *p; |
| 392 | Node *nodes = d->map.nodes; |
| 393 | MemoryRegionSection *sections = d->map.sections; |
Michael S. Tsirkin | 97115a8 | 2013-11-13 20:08:19 +0200 | [diff] [blame] | 394 | hwaddr index = addr >> TARGET_PAGE_BITS; |
Avi Kivity | 31ab2b4 | 2012-02-13 16:44:19 +0200 | [diff] [blame] | 395 | int i; |
Avi Kivity | f1f6e3b | 2011-11-20 17:52:22 +0200 | [diff] [blame] | 396 | |
Michael S. Tsirkin | 9736e55 | 2013-11-11 14:42:43 +0200 | [diff] [blame] | 397 | for (i = P_L2_LEVELS; lp.skip && (i -= lp.skip) >= 0;) { |
Avi Kivity | c19e880 | 2012-02-13 20:25:31 +0200 | [diff] [blame] | 398 | if (lp.ptr == PHYS_MAP_NODE_NIL) { |
Paolo Bonzini | 9affd6f | 2013-05-29 12:09:47 +0200 | [diff] [blame] | 399 | return §ions[PHYS_SECTION_UNASSIGNED]; |
Avi Kivity | 31ab2b4 | 2012-02-13 16:44:19 +0200 | [diff] [blame] | 400 | } |
Paolo Bonzini | 9affd6f | 2013-05-29 12:09:47 +0200 | [diff] [blame] | 401 | p = nodes[lp.ptr]; |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 402 | lp = p[(index >> (i * P_L2_BITS)) & (P_L2_SIZE - 1)]; |
Avi Kivity | f1f6e3b | 2011-11-20 17:52:22 +0200 | [diff] [blame] | 403 | } |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 404 | |
Fam Zheng | 29cb533 | 2016-03-01 14:18:23 +0800 | [diff] [blame] | 405 | if (section_covers_addr(§ions[lp.ptr], addr)) { |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 406 | return §ions[lp.ptr]; |
| 407 | } else { |
| 408 | return §ions[PHYS_SECTION_UNASSIGNED]; |
| 409 | } |
Avi Kivity | f3705d5 | 2012-03-08 16:16:34 +0200 | [diff] [blame] | 410 | } |
| 411 | |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 412 | bool memory_region_is_unassigned(MemoryRegion *mr) |
| 413 | { |
Paolo Bonzini | 2a8e749 | 2013-05-24 14:34:08 +0200 | [diff] [blame] | 414 | return mr != &io_mem_rom && mr != &io_mem_notdirty && !mr->rom_device |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 415 | && mr != &io_mem_watch; |
| 416 | } |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 417 | |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 418 | /* Called from RCU critical section */ |
Paolo Bonzini | c7086b4 | 2013-06-02 15:27:39 +0200 | [diff] [blame] | 419 | static MemoryRegionSection *address_space_lookup_region(AddressSpaceDispatch *d, |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 420 | hwaddr addr, |
| 421 | bool resolve_subpage) |
Jan Kiszka | 9f02960 | 2013-05-06 16:48:02 +0200 | [diff] [blame] | 422 | { |
Fam Zheng | 729633c | 2016-03-01 14:18:24 +0800 | [diff] [blame] | 423 | MemoryRegionSection *section = atomic_read(&d->mru_section); |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 424 | subpage_t *subpage; |
| 425 | |
Paolo Bonzini | 07c114b | 2017-11-15 15:11:03 +0100 | [diff] [blame] | 426 | if (!section || section == &d->map.sections[PHYS_SECTION_UNASSIGNED] || |
| 427 | !section_covers_addr(section, addr)) { |
Peter Xu | 003a0cf | 2017-05-15 16:50:57 +0800 | [diff] [blame] | 428 | section = phys_page_find(d, addr); |
Paolo Bonzini | 07c114b | 2017-11-15 15:11:03 +0100 | [diff] [blame] | 429 | atomic_set(&d->mru_section, section); |
Fam Zheng | 729633c | 2016-03-01 14:18:24 +0800 | [diff] [blame] | 430 | } |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 431 | if (resolve_subpage && section->mr->subpage) { |
| 432 | subpage = container_of(section->mr, subpage_t, iomem); |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 433 | section = &d->map.sections[subpage->sub_section[SUBPAGE_IDX(addr)]]; |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 434 | } |
| 435 | return section; |
Jan Kiszka | 9f02960 | 2013-05-06 16:48:02 +0200 | [diff] [blame] | 436 | } |
| 437 | |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 438 | /* Called from RCU critical section */ |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 439 | static MemoryRegionSection * |
Paolo Bonzini | c7086b4 | 2013-06-02 15:27:39 +0200 | [diff] [blame] | 440 | address_space_translate_internal(AddressSpaceDispatch *d, hwaddr addr, hwaddr *xlat, |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 441 | hwaddr *plen, bool resolve_subpage) |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 442 | { |
| 443 | MemoryRegionSection *section; |
Paolo Bonzini | 965eb2f | 2015-06-17 10:40:27 +0200 | [diff] [blame] | 444 | MemoryRegion *mr; |
Paolo Bonzini | a87f395 | 2014-02-07 15:47:46 +0100 | [diff] [blame] | 445 | Int128 diff; |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 446 | |
Paolo Bonzini | c7086b4 | 2013-06-02 15:27:39 +0200 | [diff] [blame] | 447 | section = address_space_lookup_region(d, addr, resolve_subpage); |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 448 | /* Compute offset within MemoryRegionSection */ |
| 449 | addr -= section->offset_within_address_space; |
| 450 | |
| 451 | /* Compute offset within MemoryRegion */ |
| 452 | *xlat = addr + section->offset_within_region; |
| 453 | |
Paolo Bonzini | 965eb2f | 2015-06-17 10:40:27 +0200 | [diff] [blame] | 454 | mr = section->mr; |
Paolo Bonzini | b242e0e | 2015-07-04 00:24:51 +0200 | [diff] [blame] | 455 | |
| 456 | /* MMIO registers can be expected to perform full-width accesses based only |
| 457 | * on their address, without considering adjacent registers that could |
| 458 | * decode to completely different MemoryRegions. When such registers |
| 459 | * exist (e.g. I/O ports 0xcf8 and 0xcf9 on most PC chipsets), MMIO |
| 460 | * regions overlap wildly. For this reason we cannot clamp the accesses |
| 461 | * here. |
| 462 | * |
| 463 | * If the length is small (as is the case for address_space_ldl/stl), |
| 464 | * everything works fine. If the incoming length is large, however, |
| 465 | * the caller really has to do the clamping through memory_access_size. |
| 466 | */ |
Paolo Bonzini | 965eb2f | 2015-06-17 10:40:27 +0200 | [diff] [blame] | 467 | if (memory_region_is_ram(mr)) { |
Paolo Bonzini | e4a511f | 2015-06-17 10:36:54 +0200 | [diff] [blame] | 468 | diff = int128_sub(section->size, int128_make64(addr)); |
Paolo Bonzini | 965eb2f | 2015-06-17 10:40:27 +0200 | [diff] [blame] | 469 | *plen = int128_get64(int128_min(diff, int128_make64(*plen))); |
| 470 | } |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 471 | return section; |
| 472 | } |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 473 | |
Lingfeng Yang | 4e37b73 | 2018-09-17 13:42:57 -0700 | [diff] [blame] | 474 | static const char* memory_region_get_name_safe(MemoryRegion* mr) { |
| 475 | if (!mr) { |
| 476 | return "(null region)"; |
| 477 | } |
| 478 | |
| 479 | if (!mr->name) { |
| 480 | return "(none)"; |
| 481 | } |
| 482 | |
| 483 | return mr->name; |
| 484 | } |
| 485 | |
| 486 | static void flatview_spin_warning( |
| 487 | const char* label, |
| 488 | uint32_t iters, |
| 489 | hwaddr first_addr, |
| 490 | hwaddr addr, |
| 491 | MemoryRegion* first_mr, |
| 492 | MemoryRegion* mr) { |
| 493 | |
| 494 | qemu_spin_warning( |
| 495 | iters, FLATVIEW_UNUSUAL_ITER_COUNT, |
| 496 | "Warning: %s has iterated %u times. " |
| 497 | "First addr: 0x%llx. Last addr: 0x%llx. " |
| 498 | "First mr: %p (%s). Last mr: %p (%s)\n", |
| 499 | label, |
| 500 | iters, |
| 501 | (unsigned long long)first_addr, |
| 502 | (unsigned long long)addr, |
| 503 | first_mr, memory_region_get_name_safe(first_mr), |
| 504 | mr, memory_region_get_name_safe(mr)); |
| 505 | } |
| 506 | |
Peter Xu | d5e5faf | 2017-10-10 11:42:45 +0200 | [diff] [blame] | 507 | /** |
Lingfeng Yang | 6915dfb | 2018-09-18 08:51:38 -0700 | [diff] [blame] | 508 | * address_space_translate_iommu - translate an address through an IOMMU |
| 509 | * memory region and then through the target address space. |
| 510 | * |
| 511 | * @iommu_mr: the IOMMU memory region that we start the translation from |
| 512 | * @addr: the address to be translated through the MMU |
| 513 | * @xlat: the translated address offset within the destination memory region. |
| 514 | * It cannot be %NULL. |
| 515 | * @plen_out: valid read/write length of the translated address. It |
| 516 | * cannot be %NULL. |
| 517 | * @page_mask_out: page mask for the translated address. This |
| 518 | * should only be meaningful for IOMMU translated |
| 519 | * addresses, since there may be huge pages that this bit |
| 520 | * would tell. It can be %NULL if we don't care about it. |
| 521 | * @is_write: whether the translation operation is for write |
| 522 | * @is_mmio: whether this can be MMIO, set true if it can |
| 523 | * @target_as: the address space targeted by the IOMMU |
| 524 | * |
| 525 | * This function is called from RCU critical section. It is the common |
| 526 | * part of flatview_do_translate and address_space_translate_cached. |
| 527 | */ |
| 528 | static MemoryRegionSection address_space_translate_iommu(IOMMUMemoryRegion *iommu_mr, |
| 529 | hwaddr *xlat, |
| 530 | hwaddr *plen_out, |
| 531 | hwaddr *page_mask_out, |
| 532 | bool is_write, |
| 533 | bool is_mmio, |
| 534 | AddressSpace **target_as) |
| 535 | { |
| 536 | MemoryRegionSection *section; |
| 537 | hwaddr page_mask = (hwaddr)-1; |
| 538 | uint32_t iters = 0; |
| 539 | hwaddr first_addr = *xlat; |
| 540 | |
| 541 | do { |
| 542 | hwaddr addr = *xlat; |
| 543 | |
| 544 | ++iters; |
| 545 | flatview_spin_warning( |
| 546 | "address_space_translate_iommu", |
| 547 | iters, |
| 548 | first_addr, addr, |
| 549 | NULL, section ? section->mr : NULL); |
| 550 | |
| 551 | IOMMUMemoryRegionClass *imrc = memory_region_get_iommu_class_nocheck(iommu_mr); |
| 552 | IOMMUTLBEntry iotlb = imrc->translate(iommu_mr, addr, is_write ? |
| 553 | IOMMU_WO : IOMMU_RO); |
| 554 | |
| 555 | if (!(iotlb.perm & (1 << is_write))) { |
| 556 | goto unassigned; |
| 557 | } |
| 558 | |
| 559 | addr = ((iotlb.translated_addr & ~iotlb.addr_mask) |
| 560 | | (addr & iotlb.addr_mask)); |
| 561 | page_mask &= iotlb.addr_mask; |
| 562 | *plen_out = MIN(*plen_out, (addr | iotlb.addr_mask) - addr + 1); |
| 563 | *target_as = iotlb.target_as; |
| 564 | |
| 565 | section = address_space_translate_internal( |
| 566 | address_space_to_dispatch(iotlb.target_as), addr, xlat, |
| 567 | plen_out, is_mmio); |
| 568 | |
| 569 | iommu_mr = memory_region_get_iommu(section->mr); |
| 570 | } while (unlikely(iommu_mr)); |
| 571 | |
| 572 | if (page_mask_out) { |
| 573 | *page_mask_out = page_mask; |
| 574 | } |
| 575 | return *section; |
| 576 | |
| 577 | unassigned: |
| 578 | return (MemoryRegionSection) { .mr = &io_mem_unassigned }; |
| 579 | } |
| 580 | |
| 581 | /** |
Peter Xu | d5e5faf | 2017-10-10 11:42:45 +0200 | [diff] [blame] | 582 | * flatview_do_translate - translate an address in FlatView |
| 583 | * |
| 584 | * @fv: the flat view that we want to translate on |
| 585 | * @addr: the address to be translated in above address space |
| 586 | * @xlat: the translated address offset within memory region. It |
| 587 | * cannot be @NULL. |
| 588 | * @plen_out: valid read/write length of the translated address. It |
| 589 | * can be @NULL when we don't care about it. |
| 590 | * @page_mask_out: page mask for the translated address. This |
| 591 | * should only be meaningful for IOMMU translated |
| 592 | * addresses, since there may be huge pages that this bit |
| 593 | * would tell. It can be @NULL if we don't care about it. |
| 594 | * @is_write: whether the translation operation is for write |
| 595 | * @is_mmio: whether this can be MMIO, set true if it can |
| 596 | * |
| 597 | * This function is called from RCU critical section |
| 598 | */ |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 599 | static MemoryRegionSection flatview_do_translate(FlatView *fv, |
| 600 | hwaddr addr, |
| 601 | hwaddr *xlat, |
Peter Xu | d5e5faf | 2017-10-10 11:42:45 +0200 | [diff] [blame] | 602 | hwaddr *plen_out, |
| 603 | hwaddr *page_mask_out, |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 604 | bool is_write, |
| 605 | bool is_mmio, |
| 606 | AddressSpace **target_as) |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 607 | { |
Lingfeng Yang | 4e37b73 | 2018-09-17 13:42:57 -0700 | [diff] [blame] | 608 | MemoryRegionSection *section = NULL; |
Lingfeng Yang | 7ddf8a7 | 2019-04-17 11:26:25 -0700 | [diff] [blame] | 609 | MemoryRegionSection result; |
| 610 | |
Alexey Kardashevskiy | 3df9d74 | 2017-07-11 13:56:19 +1000 | [diff] [blame] | 611 | IOMMUMemoryRegion *iommu_mr; |
Peter Xu | d5e5faf | 2017-10-10 11:42:45 +0200 | [diff] [blame] | 612 | hwaddr plen = (hwaddr)(-1); |
| 613 | |
Lingfeng Yang | ed29c5d | 2018-09-18 08:41:06 -0700 | [diff] [blame] | 614 | if (!plen_out) { |
| 615 | plen_out = &plen; |
Peter Xu | d5e5faf | 2017-10-10 11:42:45 +0200 | [diff] [blame] | 616 | } |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 617 | |
Lingfeng Yang | 7ddf8a7 | 2019-04-17 11:26:25 -0700 | [diff] [blame] | 618 | flatview_ref(fv); |
| 619 | |
Lingfeng Yang | 6915dfb | 2018-09-18 08:51:38 -0700 | [diff] [blame] | 620 | section = address_space_translate_internal( |
| 621 | flatview_to_dispatch(fv), addr, xlat, |
| 622 | plen_out, is_mmio); |
Lingfeng Yang | 7ddf8a7 | 2019-04-17 11:26:25 -0700 | [diff] [blame] | 623 | |
Lingfeng Yang | 6915dfb | 2018-09-18 08:51:38 -0700 | [diff] [blame] | 624 | iommu_mr = memory_region_get_iommu(section->mr); |
| 625 | if (unlikely(iommu_mr)) { |
Lingfeng Yang | 7ddf8a7 | 2019-04-17 11:26:25 -0700 | [diff] [blame] | 626 | |
| 627 | MemoryRegionSection iommu_section; |
| 628 | |
| 629 | iommu_section = |
| 630 | address_space_translate_iommu( |
| 631 | iommu_mr, xlat, |
| 632 | plen_out, page_mask_out, |
| 633 | is_write, is_mmio, |
| 634 | target_as); |
| 635 | |
| 636 | flatview_unref(fv); |
| 637 | |
| 638 | return iommu_section; |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 639 | } |
| 640 | |
Peter Xu | d5e5faf | 2017-10-10 11:42:45 +0200 | [diff] [blame] | 641 | if (page_mask_out) { |
Lingfeng Yang | 6915dfb | 2018-09-18 08:51:38 -0700 | [diff] [blame] | 642 | /* Not behind an IOMMU, use default page size. */ |
| 643 | *page_mask_out = ~TARGET_PAGE_MASK; |
Peter Xu | d5e5faf | 2017-10-10 11:42:45 +0200 | [diff] [blame] | 644 | } |
| 645 | |
Lingfeng Yang | 7ddf8a7 | 2019-04-17 11:26:25 -0700 | [diff] [blame] | 646 | result = *section; |
| 647 | flatview_unref(fv); |
| 648 | |
| 649 | return result; |
Peter Xu | a764040 | 2017-05-17 16:57:42 +0800 | [diff] [blame] | 650 | } |
| 651 | |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 652 | /* Called from RCU critical section */ |
| 653 | IOMMUTLBEntry address_space_get_iotlb_entry(AddressSpace *as, hwaddr addr, |
| 654 | bool is_write) |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 655 | { |
Peter Xu | a764040 | 2017-05-17 16:57:42 +0800 | [diff] [blame] | 656 | MemoryRegionSection section; |
Peter Xu | 076a93d | 2017-10-10 11:42:46 +0200 | [diff] [blame] | 657 | hwaddr xlat, page_mask; |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 658 | |
Peter Xu | 076a93d | 2017-10-10 11:42:46 +0200 | [diff] [blame] | 659 | /* |
| 660 | * This can never be MMIO, and we don't really care about plen, |
| 661 | * but page mask. |
| 662 | */ |
| 663 | section = flatview_do_translate(address_space_to_flatview(as), addr, &xlat, |
| 664 | NULL, &page_mask, is_write, false, &as); |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 665 | |
Peter Xu | a764040 | 2017-05-17 16:57:42 +0800 | [diff] [blame] | 666 | /* Illegal translation */ |
| 667 | if (section.mr == &io_mem_unassigned) { |
| 668 | goto iotlb_fail; |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 669 | } |
| 670 | |
Peter Xu | a764040 | 2017-05-17 16:57:42 +0800 | [diff] [blame] | 671 | /* Convert memory region offset into address space offset */ |
| 672 | xlat += section.offset_within_address_space - |
| 673 | section.offset_within_region; |
| 674 | |
Peter Xu | a764040 | 2017-05-17 16:57:42 +0800 | [diff] [blame] | 675 | return (IOMMUTLBEntry) { |
Alexey Kardashevskiy | e76bb18 | 2017-09-21 18:50:53 +1000 | [diff] [blame] | 676 | .target_as = as, |
Peter Xu | 076a93d | 2017-10-10 11:42:46 +0200 | [diff] [blame] | 677 | .iova = addr & ~page_mask, |
| 678 | .translated_addr = xlat & ~page_mask, |
| 679 | .addr_mask = page_mask, |
Peter Xu | a764040 | 2017-05-17 16:57:42 +0800 | [diff] [blame] | 680 | /* IOTLBs are for DMAs, and DMA only allows on RAMs. */ |
| 681 | .perm = IOMMU_RW, |
| 682 | }; |
| 683 | |
| 684 | iotlb_fail: |
| 685 | return (IOMMUTLBEntry) {0}; |
Paolo Bonzini | a87f395 | 2014-02-07 15:47:46 +0100 | [diff] [blame] | 686 | } |
Peter Crosthwaite | 23820db | 2015-03-16 22:35:54 -0700 | [diff] [blame] | 687 | |
Paolo Bonzini | a87f395 | 2014-02-07 15:47:46 +0100 | [diff] [blame] | 688 | /* Called from RCU critical section */ |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 689 | MemoryRegion *flatview_translate(FlatView *fv, hwaddr addr, hwaddr *xlat, |
| 690 | hwaddr *plen, bool is_write) |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 691 | { |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 692 | MemoryRegion *mr; |
Peter Xu | a764040 | 2017-05-17 16:57:42 +0800 | [diff] [blame] | 693 | MemoryRegionSection section; |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 694 | AddressSpace *as = NULL; |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 695 | |
Peter Xu | a764040 | 2017-05-17 16:57:42 +0800 | [diff] [blame] | 696 | /* This can be MMIO, so setup MMIO bit. */ |
Peter Xu | d5e5faf | 2017-10-10 11:42:45 +0200 | [diff] [blame] | 697 | section = flatview_do_translate(fv, addr, xlat, plen, NULL, |
| 698 | is_write, true, &as); |
Peter Xu | a764040 | 2017-05-17 16:57:42 +0800 | [diff] [blame] | 699 | mr = section.mr; |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 700 | |
Paolo Bonzini | a87f395 | 2014-02-07 15:47:46 +0100 | [diff] [blame] | 701 | if (xen_enabled() && memory_access_is_direct(mr, is_write)) { |
| 702 | hwaddr page = ((addr & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE) - addr; |
| 703 | *plen = MIN(page, *plen); |
| 704 | } |
| 705 | |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 706 | return mr; |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 707 | } |
| 708 | |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 709 | /* Called from RCU critical section */ |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 710 | MemoryRegionSection * |
Peter Maydell | d7898cd | 2016-01-21 14:15:05 +0000 | [diff] [blame] | 711 | address_space_translate_for_iotlb(CPUState *cpu, int asidx, hwaddr addr, |
Paolo Bonzini | 9d82b5a | 2013-08-16 08:26:30 +0200 | [diff] [blame] | 712 | hwaddr *xlat, hwaddr *plen) |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 713 | { |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 714 | MemoryRegionSection *section; |
Alex Bennée | f35e44e | 2016-10-21 16:34:18 +0100 | [diff] [blame] | 715 | AddressSpaceDispatch *d = atomic_rcu_read(&cpu->cpu_ases[asidx].memory_dispatch); |
Peter Maydell | d7898cd | 2016-01-21 14:15:05 +0000 | [diff] [blame] | 716 | |
| 717 | section = address_space_translate_internal(d, addr, xlat, plen, false); |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 718 | |
Alexey Kardashevskiy | 3df9d74 | 2017-07-11 13:56:19 +1000 | [diff] [blame] | 719 | assert(!memory_region_is_iommu(section->mr)); |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 720 | return section; |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 721 | } |
bellard | 9fa3e85 | 2004-01-04 18:06:42 +0000 | [diff] [blame] | 722 | #endif |
bellard | fd6ce8f | 2003-05-14 19:00:11 +0000 | [diff] [blame] | 723 | |
Andreas Färber | b170fce | 2013-01-20 20:23:22 +0100 | [diff] [blame] | 724 | #if !defined(CONFIG_USER_ONLY) |
pbrook | 9656f32 | 2008-07-01 20:01:19 +0000 | [diff] [blame] | 725 | |
Juan Quintela | e59fb37 | 2009-09-29 22:48:21 +0200 | [diff] [blame] | 726 | static int cpu_common_post_load(void *opaque, int version_id) |
Juan Quintela | e7f4eff | 2009-09-10 03:04:33 +0200 | [diff] [blame] | 727 | { |
Andreas Färber | 259186a | 2013-01-17 18:51:17 +0100 | [diff] [blame] | 728 | CPUState *cpu = opaque; |
Juan Quintela | e7f4eff | 2009-09-10 03:04:33 +0200 | [diff] [blame] | 729 | |
aurel32 | 3098dba | 2009-03-07 21:28:24 +0000 | [diff] [blame] | 730 | /* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the |
| 731 | version_id is increased. */ |
Andreas Färber | 259186a | 2013-01-17 18:51:17 +0100 | [diff] [blame] | 732 | cpu->interrupt_request &= ~0x01; |
Alex Bennée | d10eb08 | 2016-11-14 14:17:28 +0000 | [diff] [blame] | 733 | tlb_flush(cpu); |
pbrook | 9656f32 | 2008-07-01 20:01:19 +0000 | [diff] [blame] | 734 | |
Pavel Dovgalyuk | 15a356c | 2018-01-10 16:48:46 +0300 | [diff] [blame] | 735 | /* loadvm has just updated the content of RAM, bypassing the |
| 736 | * usual mechanisms that ensure we flush TBs for writes to |
| 737 | * memory we've translated code from. So we must flush all TBs, |
| 738 | * which will now be stale. |
| 739 | */ |
| 740 | tb_flush(cpu); |
| 741 | |
pbrook | 9656f32 | 2008-07-01 20:01:19 +0000 | [diff] [blame] | 742 | return 0; |
| 743 | } |
Juan Quintela | e7f4eff | 2009-09-10 03:04:33 +0200 | [diff] [blame] | 744 | |
Pavel Dovgaluk | 6c3bff0 | 2014-07-31 09:41:17 +0400 | [diff] [blame] | 745 | static int cpu_common_pre_load(void *opaque) |
| 746 | { |
| 747 | CPUState *cpu = opaque; |
| 748 | |
Paolo Bonzini | adee642 | 2014-12-19 12:53:14 +0100 | [diff] [blame] | 749 | cpu->exception_index = -1; |
Pavel Dovgaluk | 6c3bff0 | 2014-07-31 09:41:17 +0400 | [diff] [blame] | 750 | |
| 751 | return 0; |
| 752 | } |
| 753 | |
| 754 | static bool cpu_common_exception_index_needed(void *opaque) |
| 755 | { |
| 756 | CPUState *cpu = opaque; |
| 757 | |
Paolo Bonzini | adee642 | 2014-12-19 12:53:14 +0100 | [diff] [blame] | 758 | return tcg_enabled() && cpu->exception_index != -1; |
Pavel Dovgaluk | 6c3bff0 | 2014-07-31 09:41:17 +0400 | [diff] [blame] | 759 | } |
| 760 | |
| 761 | static const VMStateDescription vmstate_cpu_common_exception_index = { |
| 762 | .name = "cpu_common/exception_index", |
| 763 | .version_id = 1, |
| 764 | .minimum_version_id = 1, |
Juan Quintela | 5cd8cad | 2014-09-23 14:09:54 +0200 | [diff] [blame] | 765 | .needed = cpu_common_exception_index_needed, |
Pavel Dovgaluk | 6c3bff0 | 2014-07-31 09:41:17 +0400 | [diff] [blame] | 766 | .fields = (VMStateField[]) { |
| 767 | VMSTATE_INT32(exception_index, CPUState), |
| 768 | VMSTATE_END_OF_LIST() |
| 769 | } |
| 770 | }; |
| 771 | |
Andrey Smetanin | bac05aa | 2015-07-03 15:01:44 +0300 | [diff] [blame] | 772 | static bool cpu_common_crash_occurred_needed(void *opaque) |
| 773 | { |
| 774 | CPUState *cpu = opaque; |
| 775 | |
| 776 | return cpu->crash_occurred; |
| 777 | } |
| 778 | |
| 779 | static const VMStateDescription vmstate_cpu_common_crash_occurred = { |
| 780 | .name = "cpu_common/crash_occurred", |
| 781 | .version_id = 1, |
| 782 | .minimum_version_id = 1, |
| 783 | .needed = cpu_common_crash_occurred_needed, |
| 784 | .fields = (VMStateField[]) { |
| 785 | VMSTATE_BOOL(crash_occurred, CPUState), |
| 786 | VMSTATE_END_OF_LIST() |
| 787 | } |
| 788 | }; |
| 789 | |
Andreas Färber | 1a1562f | 2013-06-17 04:09:11 +0200 | [diff] [blame] | 790 | const VMStateDescription vmstate_cpu_common = { |
Juan Quintela | e7f4eff | 2009-09-10 03:04:33 +0200 | [diff] [blame] | 791 | .name = "cpu_common", |
| 792 | .version_id = 1, |
| 793 | .minimum_version_id = 1, |
Pavel Dovgaluk | 6c3bff0 | 2014-07-31 09:41:17 +0400 | [diff] [blame] | 794 | .pre_load = cpu_common_pre_load, |
Juan Quintela | e7f4eff | 2009-09-10 03:04:33 +0200 | [diff] [blame] | 795 | .post_load = cpu_common_post_load, |
Juan Quintela | 35d0845 | 2014-04-16 16:01:33 +0200 | [diff] [blame] | 796 | .fields = (VMStateField[]) { |
Andreas Färber | 259186a | 2013-01-17 18:51:17 +0100 | [diff] [blame] | 797 | VMSTATE_UINT32(halted, CPUState), |
| 798 | VMSTATE_UINT32(interrupt_request, CPUState), |
Juan Quintela | e7f4eff | 2009-09-10 03:04:33 +0200 | [diff] [blame] | 799 | VMSTATE_END_OF_LIST() |
Pavel Dovgaluk | 6c3bff0 | 2014-07-31 09:41:17 +0400 | [diff] [blame] | 800 | }, |
Juan Quintela | 5cd8cad | 2014-09-23 14:09:54 +0200 | [diff] [blame] | 801 | .subsections = (const VMStateDescription*[]) { |
| 802 | &vmstate_cpu_common_exception_index, |
Andrey Smetanin | bac05aa | 2015-07-03 15:01:44 +0300 | [diff] [blame] | 803 | &vmstate_cpu_common_crash_occurred, |
Juan Quintela | 5cd8cad | 2014-09-23 14:09:54 +0200 | [diff] [blame] | 804 | NULL |
Juan Quintela | e7f4eff | 2009-09-10 03:04:33 +0200 | [diff] [blame] | 805 | } |
| 806 | }; |
Andreas Färber | 1a1562f | 2013-06-17 04:09:11 +0200 | [diff] [blame] | 807 | |
pbrook | 9656f32 | 2008-07-01 20:01:19 +0000 | [diff] [blame] | 808 | #endif |
| 809 | |
Andreas Färber | 38d8f5c | 2012-12-17 19:47:15 +0100 | [diff] [blame] | 810 | CPUState *qemu_get_cpu(int index) |
Glauber Costa | 950f147 | 2009-06-09 12:15:18 -0400 | [diff] [blame] | 811 | { |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 812 | CPUState *cpu; |
Glauber Costa | 950f147 | 2009-06-09 12:15:18 -0400 | [diff] [blame] | 813 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 814 | CPU_FOREACH(cpu) { |
Andreas Färber | 55e5c28 | 2012-12-17 06:18:02 +0100 | [diff] [blame] | 815 | if (cpu->cpu_index == index) { |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 816 | return cpu; |
Andreas Färber | 55e5c28 | 2012-12-17 06:18:02 +0100 | [diff] [blame] | 817 | } |
Glauber Costa | 950f147 | 2009-06-09 12:15:18 -0400 | [diff] [blame] | 818 | } |
| 819 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 820 | return NULL; |
Glauber Costa | 950f147 | 2009-06-09 12:15:18 -0400 | [diff] [blame] | 821 | } |
| 822 | |
Edgar E. Iglesias | 09daed8 | 2013-12-17 13:06:51 +1000 | [diff] [blame] | 823 | #if !defined(CONFIG_USER_ONLY) |
Peter Xu | 80ceb07 | 2017-11-23 17:23:32 +0800 | [diff] [blame] | 824 | void cpu_address_space_init(CPUState *cpu, int asidx, |
| 825 | const char *prefix, MemoryRegion *mr) |
Edgar E. Iglesias | 09daed8 | 2013-12-17 13:06:51 +1000 | [diff] [blame] | 826 | { |
Peter Maydell | 12ebc9a | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 827 | CPUAddressSpace *newas; |
Peter Xu | 80ceb07 | 2017-11-23 17:23:32 +0800 | [diff] [blame] | 828 | AddressSpace *as = g_new0(AddressSpace, 1); |
Peter Xu | 87a621d | 2017-11-23 17:23:33 +0800 | [diff] [blame] | 829 | char *as_name; |
Peter Xu | 80ceb07 | 2017-11-23 17:23:32 +0800 | [diff] [blame] | 830 | |
| 831 | assert(mr); |
Peter Xu | 87a621d | 2017-11-23 17:23:33 +0800 | [diff] [blame] | 832 | as_name = g_strdup_printf("%s-%d", prefix, cpu->cpu_index); |
| 833 | address_space_init(as, mr, as_name); |
| 834 | g_free(as_name); |
Peter Maydell | 12ebc9a | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 835 | |
| 836 | /* Target code should have set num_ases before calling us */ |
| 837 | assert(asidx < cpu->num_ases); |
| 838 | |
Peter Maydell | 56943e8 | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 839 | if (asidx == 0) { |
| 840 | /* address space 0 gets the convenience alias */ |
| 841 | cpu->as = as; |
| 842 | } |
| 843 | |
Peter Maydell | 12ebc9a | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 844 | /* KVM cannot currently support multiple address spaces. */ |
| 845 | assert(asidx == 0 || !kvm_enabled()); |
Edgar E. Iglesias | 09daed8 | 2013-12-17 13:06:51 +1000 | [diff] [blame] | 846 | |
Peter Maydell | 12ebc9a | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 847 | if (!cpu->cpu_ases) { |
| 848 | cpu->cpu_ases = g_new0(CPUAddressSpace, cpu->num_ases); |
Edgar E. Iglesias | 09daed8 | 2013-12-17 13:06:51 +1000 | [diff] [blame] | 849 | } |
Peter Maydell | 32857f4 | 2015-10-01 15:29:50 +0100 | [diff] [blame] | 850 | |
Peter Maydell | 12ebc9a | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 851 | newas = &cpu->cpu_ases[asidx]; |
| 852 | newas->cpu = cpu; |
| 853 | newas->as = as; |
Peter Maydell | 56943e8 | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 854 | if (tcg_enabled()) { |
Peter Maydell | 12ebc9a | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 855 | newas->tcg_as_listener.commit = tcg_commit; |
| 856 | memory_listener_register(&newas->tcg_as_listener, as); |
Peter Maydell | 56943e8 | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 857 | } |
Edgar E. Iglesias | 09daed8 | 2013-12-17 13:06:51 +1000 | [diff] [blame] | 858 | } |
Peter Maydell | 651a5bc | 2016-01-21 14:15:05 +0000 | [diff] [blame] | 859 | |
| 860 | AddressSpace *cpu_get_address_space(CPUState *cpu, int asidx) |
| 861 | { |
| 862 | /* Return the AddressSpace corresponding to the specified index */ |
| 863 | return cpu->cpu_ases[asidx].as; |
| 864 | } |
Edgar E. Iglesias | 09daed8 | 2013-12-17 13:06:51 +1000 | [diff] [blame] | 865 | #endif |
| 866 | |
Laurent Vivier | 7bbc124 | 2016-10-20 13:26:04 +0200 | [diff] [blame] | 867 | void cpu_exec_unrealizefn(CPUState *cpu) |
Bharata B Rao | 1c59eb3 | 2016-05-12 09:18:11 +0530 | [diff] [blame] | 868 | { |
Bharata B Rao | 9dfeca7 | 2016-05-12 09:18:12 +0530 | [diff] [blame] | 869 | CPUClass *cc = CPU_GET_CLASS(cpu); |
| 870 | |
Paolo Bonzini | 267f685 | 2016-08-28 03:45:14 +0200 | [diff] [blame] | 871 | cpu_list_remove(cpu); |
Bharata B Rao | 9dfeca7 | 2016-05-12 09:18:12 +0530 | [diff] [blame] | 872 | |
| 873 | if (cc->vmsd != NULL) { |
| 874 | vmstate_unregister(NULL, cc->vmsd, cpu); |
| 875 | } |
| 876 | if (qdev_get_vmsd(DEVICE(cpu)) == NULL) { |
| 877 | vmstate_unregister(NULL, &vmstate_cpu_common, cpu); |
| 878 | } |
Bharata B Rao | 1c59eb3 | 2016-05-12 09:18:11 +0530 | [diff] [blame] | 879 | } |
| 880 | |
Fam Zheng | c7e002c | 2017-07-14 10:15:08 +0800 | [diff] [blame] | 881 | Property cpu_common_props[] = { |
| 882 | #ifndef CONFIG_USER_ONLY |
| 883 | /* Create a memory property for softmmu CPU object, |
| 884 | * so users can wire up its memory. (This can't go in qom/cpu.c |
| 885 | * because that file is compiled only once for both user-mode |
| 886 | * and system builds.) The default if no link is set up is to use |
| 887 | * the system address space. |
| 888 | */ |
| 889 | DEFINE_PROP_LINK("memory", CPUState, memory, TYPE_MEMORY_REGION, |
| 890 | MemoryRegion *), |
| 891 | #endif |
| 892 | DEFINE_PROP_END_OF_LIST(), |
| 893 | }; |
| 894 | |
Laurent Vivier | 39e329e | 2016-10-20 13:26:02 +0200 | [diff] [blame] | 895 | void cpu_exec_initfn(CPUState *cpu) |
bellard | fd6ce8f | 2003-05-14 19:00:11 +0000 | [diff] [blame] | 896 | { |
Peter Maydell | 56943e8 | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 897 | cpu->as = NULL; |
Peter Maydell | 12ebc9a | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 898 | cpu->num_ases = 0; |
Peter Maydell | 56943e8 | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 899 | |
Eduardo Habkost | 291135b | 2015-04-27 17:00:33 -0300 | [diff] [blame] | 900 | #ifndef CONFIG_USER_ONLY |
Eduardo Habkost | 291135b | 2015-04-27 17:00:33 -0300 | [diff] [blame] | 901 | cpu->thread_id = qemu_get_thread_id(); |
Peter Crosthwaite | 6731d86 | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 902 | cpu->memory = system_memory; |
| 903 | object_ref(OBJECT(cpu->memory)); |
Eduardo Habkost | 291135b | 2015-04-27 17:00:33 -0300 | [diff] [blame] | 904 | #endif |
Laurent Vivier | 39e329e | 2016-10-20 13:26:02 +0200 | [diff] [blame] | 905 | } |
Eduardo Habkost | 291135b | 2015-04-27 17:00:33 -0300 | [diff] [blame] | 906 | |
Laurent Vivier | ce5b1bb | 2016-10-20 13:26:03 +0200 | [diff] [blame] | 907 | void cpu_exec_realizefn(CPUState *cpu, Error **errp) |
Laurent Vivier | 39e329e | 2016-10-20 13:26:02 +0200 | [diff] [blame] | 908 | { |
Richard Henderson | 55c3cee | 2017-10-15 19:02:42 -0700 | [diff] [blame] | 909 | CPUClass *cc = CPU_GET_CLASS(cpu); |
Emilio G. Cota | 2dda635 | 2017-11-13 13:55:25 +0000 | [diff] [blame] | 910 | static bool tcg_target_initialized; |
bellard | 6a00d60 | 2005-11-21 23:25:50 +0000 | [diff] [blame] | 911 | |
Paolo Bonzini | 267f685 | 2016-08-28 03:45:14 +0200 | [diff] [blame] | 912 | cpu_list_add(cpu); |
Igor Mammedov | 1bc7e52 | 2016-07-25 11:59:19 +0200 | [diff] [blame] | 913 | |
Emilio G. Cota | 2dda635 | 2017-11-13 13:55:25 +0000 | [diff] [blame] | 914 | if (tcg_enabled() && !tcg_target_initialized) { |
| 915 | tcg_target_initialized = true; |
Richard Henderson | 55c3cee | 2017-10-15 19:02:42 -0700 | [diff] [blame] | 916 | cc->tcg_initialize(); |
| 917 | } |
| 918 | |
Igor Mammedov | 1bc7e52 | 2016-07-25 11:59:19 +0200 | [diff] [blame] | 919 | #ifndef CONFIG_USER_ONLY |
Andreas Färber | e0d4794 | 2013-07-29 04:07:50 +0200 | [diff] [blame] | 920 | if (qdev_get_vmsd(DEVICE(cpu)) == NULL) { |
Paolo Bonzini | 741da0d | 2014-06-27 08:40:04 +0200 | [diff] [blame] | 921 | vmstate_register(NULL, cpu->cpu_index, &vmstate_cpu_common, cpu); |
Andreas Färber | e0d4794 | 2013-07-29 04:07:50 +0200 | [diff] [blame] | 922 | } |
Andreas Färber | b170fce | 2013-01-20 20:23:22 +0100 | [diff] [blame] | 923 | if (cc->vmsd != NULL) { |
Paolo Bonzini | 741da0d | 2014-06-27 08:40:04 +0200 | [diff] [blame] | 924 | vmstate_register(NULL, cpu->cpu_index, cc->vmsd, cpu); |
Andreas Färber | b170fce | 2013-01-20 20:23:22 +0100 | [diff] [blame] | 925 | } |
Paolo Bonzini | 741da0d | 2014-06-27 08:40:04 +0200 | [diff] [blame] | 926 | #endif |
bellard | fd6ce8f | 2003-05-14 19:00:11 +0000 | [diff] [blame] | 927 | } |
| 928 | |
Igor Mammedov | 2278b93 | 2018-02-07 11:40:26 +0100 | [diff] [blame] | 929 | const char *parse_cpu_model(const char *cpu_model) |
| 930 | { |
| 931 | ObjectClass *oc; |
| 932 | CPUClass *cc; |
| 933 | gchar **model_pieces; |
| 934 | const char *cpu_type; |
| 935 | |
| 936 | model_pieces = g_strsplit(cpu_model, ",", 2); |
| 937 | |
| 938 | oc = cpu_class_by_name(CPU_RESOLVING_TYPE, model_pieces[0]); |
| 939 | if (oc == NULL) { |
| 940 | error_report("unable to find CPU model '%s'", model_pieces[0]); |
| 941 | g_strfreev(model_pieces); |
| 942 | exit(EXIT_FAILURE); |
| 943 | } |
| 944 | |
| 945 | cpu_type = object_class_get_name(oc); |
| 946 | cc = CPU_CLASS(oc); |
| 947 | cc->parse_features(cpu_type, model_pieces[1], &error_fatal); |
| 948 | g_strfreev(model_pieces); |
| 949 | return cpu_type; |
| 950 | } |
| 951 | |
Pranith Kumar | 406bc33 | 2017-07-12 17:51:42 -0400 | [diff] [blame] | 952 | #if defined(CONFIG_USER_ONLY) |
Andreas Färber | 00b941e | 2013-06-29 18:55:54 +0200 | [diff] [blame] | 953 | static void breakpoint_invalidate(CPUState *cpu, target_ulong pc) |
Paul Brook | 94df27f | 2010-02-28 23:47:45 +0000 | [diff] [blame] | 954 | { |
Pranith Kumar | 406bc33 | 2017-07-12 17:51:42 -0400 | [diff] [blame] | 955 | mmap_lock(); |
| 956 | tb_lock(); |
| 957 | tb_invalidate_phys_page_range(pc, pc + 1, 0); |
| 958 | tb_unlock(); |
| 959 | mmap_unlock(); |
Paul Brook | 94df27f | 2010-02-28 23:47:45 +0000 | [diff] [blame] | 960 | } |
Pranith Kumar | 406bc33 | 2017-07-12 17:51:42 -0400 | [diff] [blame] | 961 | #else |
| 962 | static void breakpoint_invalidate(CPUState *cpu, target_ulong pc) |
| 963 | { |
| 964 | MemTxAttrs attrs; |
| 965 | hwaddr phys = cpu_get_phys_page_attrs_debug(cpu, pc, &attrs); |
| 966 | int asidx = cpu_asidx_from_attrs(cpu, attrs); |
| 967 | if (phys != -1) { |
| 968 | /* Locks grabbed by tb_invalidate_phys_addr */ |
| 969 | tb_invalidate_phys_addr(cpu->cpu_ases[asidx].as, |
| 970 | phys | (pc & ~TARGET_PAGE_MASK)); |
| 971 | } |
| 972 | } |
| 973 | #endif |
bellard | d720b93 | 2004-04-25 17:57:43 +0000 | [diff] [blame] | 974 | |
Paul Brook | c527ee8 | 2010-03-01 03:31:14 +0000 | [diff] [blame] | 975 | #if defined(CONFIG_USER_ONLY) |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 976 | void cpu_watchpoint_remove_all(CPUState *cpu, int mask) |
Paul Brook | c527ee8 | 2010-03-01 03:31:14 +0000 | [diff] [blame] | 977 | |
| 978 | { |
| 979 | } |
| 980 | |
Peter Maydell | 3ee887e | 2014-09-12 14:06:48 +0100 | [diff] [blame] | 981 | int cpu_watchpoint_remove(CPUState *cpu, vaddr addr, vaddr len, |
| 982 | int flags) |
| 983 | { |
| 984 | return -ENOSYS; |
| 985 | } |
| 986 | |
| 987 | void cpu_watchpoint_remove_by_ref(CPUState *cpu, CPUWatchpoint *watchpoint) |
| 988 | { |
| 989 | } |
| 990 | |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 991 | int cpu_watchpoint_insert(CPUState *cpu, vaddr addr, vaddr len, |
Paul Brook | c527ee8 | 2010-03-01 03:31:14 +0000 | [diff] [blame] | 992 | int flags, CPUWatchpoint **watchpoint) |
| 993 | { |
| 994 | return -ENOSYS; |
| 995 | } |
| 996 | #else |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 997 | /* Add a watchpoint. */ |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 998 | int cpu_watchpoint_insert(CPUState *cpu, vaddr addr, vaddr len, |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 999 | int flags, CPUWatchpoint **watchpoint) |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 1000 | { |
aliguori | c0ce998 | 2008-11-25 22:13:57 +0000 | [diff] [blame] | 1001 | CPUWatchpoint *wp; |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 1002 | |
Peter Maydell | 05068c0 | 2014-09-12 14:06:48 +0100 | [diff] [blame] | 1003 | /* forbid ranges which are empty or run off the end of the address space */ |
Max Filippov | 07e2863 | 2014-09-17 22:03:36 -0700 | [diff] [blame] | 1004 | if (len == 0 || (addr + len - 1) < addr) { |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 1005 | error_report("tried to set invalid watchpoint at %" |
| 1006 | VADDR_PRIx ", len=%" VADDR_PRIu, addr, len); |
aliguori | b405133 | 2008-11-18 20:14:20 +0000 | [diff] [blame] | 1007 | return -EINVAL; |
| 1008 | } |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 1009 | wp = g_malloc(sizeof(*wp)); |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 1010 | |
Yurii Zubrytskyi | 30581af | 2017-05-05 17:22:22 -0700 | [diff] [blame] | 1011 | wp->vaddress = addr; |
Peter Maydell | 05068c0 | 2014-09-12 14:06:48 +0100 | [diff] [blame] | 1012 | wp->len = len; |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1013 | wp->flags = flags; |
| 1014 | |
aliguori | 2dc9f41 | 2008-11-18 20:56:59 +0000 | [diff] [blame] | 1015 | /* keep all GDB-injected watchpoints in front */ |
Andreas Färber | ff4700b | 2013-08-26 18:23:18 +0200 | [diff] [blame] | 1016 | if (flags & BP_GDB) { |
| 1017 | QTAILQ_INSERT_HEAD(&cpu->watchpoints, wp, entry); |
| 1018 | } else { |
| 1019 | QTAILQ_INSERT_TAIL(&cpu->watchpoints, wp, entry); |
| 1020 | } |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1021 | |
Andreas Färber | 31b030d | 2013-09-04 01:29:02 +0200 | [diff] [blame] | 1022 | tlb_flush_page(cpu, addr); |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1023 | |
| 1024 | if (watchpoint) |
| 1025 | *watchpoint = wp; |
| 1026 | return 0; |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 1027 | } |
| 1028 | |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1029 | /* Remove a specific watchpoint. */ |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 1030 | int cpu_watchpoint_remove(CPUState *cpu, vaddr addr, vaddr len, |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1031 | int flags) |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 1032 | { |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1033 | CPUWatchpoint *wp; |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 1034 | |
Andreas Färber | ff4700b | 2013-08-26 18:23:18 +0200 | [diff] [blame] | 1035 | QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { |
Yurii Zubrytskyi | 30581af | 2017-05-05 17:22:22 -0700 | [diff] [blame] | 1036 | if (addr == wp->vaddress && len == wp->len |
aliguori | 6e140f2 | 2008-11-18 20:37:55 +0000 | [diff] [blame] | 1037 | && flags == (wp->flags & ~BP_WATCHPOINT_HIT)) { |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 1038 | cpu_watchpoint_remove_by_ref(cpu, wp); |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 1039 | return 0; |
| 1040 | } |
| 1041 | } |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1042 | return -ENOENT; |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 1043 | } |
| 1044 | |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1045 | /* Remove a specific watchpoint by reference. */ |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 1046 | void cpu_watchpoint_remove_by_ref(CPUState *cpu, CPUWatchpoint *watchpoint) |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1047 | { |
Andreas Färber | ff4700b | 2013-08-26 18:23:18 +0200 | [diff] [blame] | 1048 | QTAILQ_REMOVE(&cpu->watchpoints, watchpoint, entry); |
edgar_igl | 7d03f82 | 2008-05-17 18:58:29 +0000 | [diff] [blame] | 1049 | |
Yurii Zubrytskyi | 30581af | 2017-05-05 17:22:22 -0700 | [diff] [blame] | 1050 | tlb_flush_page(cpu, watchpoint->vaddress); |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1051 | |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 1052 | g_free(watchpoint); |
edgar_igl | 7d03f82 | 2008-05-17 18:58:29 +0000 | [diff] [blame] | 1053 | } |
| 1054 | |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1055 | /* Remove all matching watchpoints. */ |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 1056 | void cpu_watchpoint_remove_all(CPUState *cpu, int mask) |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1057 | { |
aliguori | c0ce998 | 2008-11-25 22:13:57 +0000 | [diff] [blame] | 1058 | CPUWatchpoint *wp, *next; |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1059 | |
Andreas Färber | ff4700b | 2013-08-26 18:23:18 +0200 | [diff] [blame] | 1060 | QTAILQ_FOREACH_SAFE(wp, &cpu->watchpoints, entry, next) { |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 1061 | if (wp->flags & mask) { |
| 1062 | cpu_watchpoint_remove_by_ref(cpu, wp); |
| 1063 | } |
aliguori | c0ce998 | 2008-11-25 22:13:57 +0000 | [diff] [blame] | 1064 | } |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1065 | } |
Peter Maydell | 05068c0 | 2014-09-12 14:06:48 +0100 | [diff] [blame] | 1066 | |
| 1067 | /* Return true if this watchpoint address matches the specified |
| 1068 | * access (ie the address range covered by the watchpoint overlaps |
| 1069 | * partially or completely with the address range covered by the |
| 1070 | * access). |
| 1071 | */ |
| 1072 | static inline bool cpu_watchpoint_address_matches(CPUWatchpoint *wp, |
| 1073 | vaddr addr, |
| 1074 | vaddr len) |
| 1075 | { |
| 1076 | /* We know the lengths are non-zero, but a little caution is |
| 1077 | * required to avoid errors in the case where the range ends |
| 1078 | * exactly at the top of the address space and so addr + len |
| 1079 | * wraps round to zero. |
| 1080 | */ |
Yurii Zubrytskyi | 30581af | 2017-05-05 17:22:22 -0700 | [diff] [blame] | 1081 | vaddr wpend = wp->vaddress + wp->len - 1; |
Peter Maydell | 05068c0 | 2014-09-12 14:06:48 +0100 | [diff] [blame] | 1082 | vaddr addrend = addr + len - 1; |
| 1083 | |
Yurii Zubrytskyi | 30581af | 2017-05-05 17:22:22 -0700 | [diff] [blame] | 1084 | return !(addr > wpend || wp->vaddress > addrend); |
Peter Maydell | 05068c0 | 2014-09-12 14:06:48 +0100 | [diff] [blame] | 1085 | } |
| 1086 | |
Paul Brook | c527ee8 | 2010-03-01 03:31:14 +0000 | [diff] [blame] | 1087 | #endif |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1088 | |
| 1089 | /* Add a breakpoint. */ |
Andreas Färber | b3310ab | 2013-09-02 17:26:20 +0200 | [diff] [blame] | 1090 | int cpu_breakpoint_insert(CPUState *cpu, vaddr pc, int flags, |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1091 | CPUBreakpoint **breakpoint) |
bellard | 4c3a88a | 2003-07-26 12:06:08 +0000 | [diff] [blame] | 1092 | { |
aliguori | c0ce998 | 2008-11-25 22:13:57 +0000 | [diff] [blame] | 1093 | CPUBreakpoint *bp; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 1094 | |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 1095 | bp = g_malloc(sizeof(*bp)); |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1096 | |
| 1097 | bp->pc = pc; |
| 1098 | bp->flags = flags; |
| 1099 | |
aliguori | 2dc9f41 | 2008-11-18 20:56:59 +0000 | [diff] [blame] | 1100 | /* keep all GDB-injected breakpoints in front */ |
Andreas Färber | 00b941e | 2013-06-29 18:55:54 +0200 | [diff] [blame] | 1101 | if (flags & BP_GDB) { |
Andreas Färber | f0c3c50 | 2013-08-26 21:22:53 +0200 | [diff] [blame] | 1102 | QTAILQ_INSERT_HEAD(&cpu->breakpoints, bp, entry); |
Andreas Färber | 00b941e | 2013-06-29 18:55:54 +0200 | [diff] [blame] | 1103 | } else { |
Andreas Färber | f0c3c50 | 2013-08-26 21:22:53 +0200 | [diff] [blame] | 1104 | QTAILQ_INSERT_TAIL(&cpu->breakpoints, bp, entry); |
Andreas Färber | 00b941e | 2013-06-29 18:55:54 +0200 | [diff] [blame] | 1105 | } |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1106 | |
Andreas Färber | f0c3c50 | 2013-08-26 21:22:53 +0200 | [diff] [blame] | 1107 | breakpoint_invalidate(cpu, pc); |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1108 | |
Andreas Färber | 00b941e | 2013-06-29 18:55:54 +0200 | [diff] [blame] | 1109 | if (breakpoint) { |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1110 | *breakpoint = bp; |
Andreas Färber | 00b941e | 2013-06-29 18:55:54 +0200 | [diff] [blame] | 1111 | } |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1112 | return 0; |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1113 | } |
| 1114 | |
| 1115 | /* Remove a specific breakpoint. */ |
Andreas Färber | b3310ab | 2013-09-02 17:26:20 +0200 | [diff] [blame] | 1116 | int cpu_breakpoint_remove(CPUState *cpu, vaddr pc, int flags) |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1117 | { |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1118 | CPUBreakpoint *bp; |
| 1119 | |
Andreas Färber | f0c3c50 | 2013-08-26 21:22:53 +0200 | [diff] [blame] | 1120 | QTAILQ_FOREACH(bp, &cpu->breakpoints, entry) { |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1121 | if (bp->pc == pc && bp->flags == flags) { |
Andreas Färber | b3310ab | 2013-09-02 17:26:20 +0200 | [diff] [blame] | 1122 | cpu_breakpoint_remove_by_ref(cpu, bp); |
bellard | 4c3a88a | 2003-07-26 12:06:08 +0000 | [diff] [blame] | 1123 | return 0; |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1124 | } |
bellard | 4c3a88a | 2003-07-26 12:06:08 +0000 | [diff] [blame] | 1125 | } |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1126 | return -ENOENT; |
bellard | 4c3a88a | 2003-07-26 12:06:08 +0000 | [diff] [blame] | 1127 | } |
| 1128 | |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1129 | /* Remove a specific breakpoint by reference. */ |
Andreas Färber | b3310ab | 2013-09-02 17:26:20 +0200 | [diff] [blame] | 1130 | void cpu_breakpoint_remove_by_ref(CPUState *cpu, CPUBreakpoint *breakpoint) |
bellard | 4c3a88a | 2003-07-26 12:06:08 +0000 | [diff] [blame] | 1131 | { |
Andreas Färber | f0c3c50 | 2013-08-26 21:22:53 +0200 | [diff] [blame] | 1132 | QTAILQ_REMOVE(&cpu->breakpoints, breakpoint, entry); |
| 1133 | |
| 1134 | breakpoint_invalidate(cpu, breakpoint->pc); |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1135 | |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 1136 | g_free(breakpoint); |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1137 | } |
| 1138 | |
| 1139 | /* Remove all matching breakpoints. */ |
Andreas Färber | b3310ab | 2013-09-02 17:26:20 +0200 | [diff] [blame] | 1140 | void cpu_breakpoint_remove_all(CPUState *cpu, int mask) |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1141 | { |
aliguori | c0ce998 | 2008-11-25 22:13:57 +0000 | [diff] [blame] | 1142 | CPUBreakpoint *bp, *next; |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 1143 | |
Andreas Färber | f0c3c50 | 2013-08-26 21:22:53 +0200 | [diff] [blame] | 1144 | QTAILQ_FOREACH_SAFE(bp, &cpu->breakpoints, entry, next) { |
Andreas Färber | b3310ab | 2013-09-02 17:26:20 +0200 | [diff] [blame] | 1145 | if (bp->flags & mask) { |
| 1146 | cpu_breakpoint_remove_by_ref(cpu, bp); |
| 1147 | } |
aliguori | c0ce998 | 2008-11-25 22:13:57 +0000 | [diff] [blame] | 1148 | } |
bellard | 4c3a88a | 2003-07-26 12:06:08 +0000 | [diff] [blame] | 1149 | } |
| 1150 | |
bellard | c33a346 | 2003-07-29 20:50:33 +0000 | [diff] [blame] | 1151 | /* enable or disable single step mode. EXCP_DEBUG is returned by the |
| 1152 | CPU loop after each instruction */ |
Andreas Färber | 3825b28 | 2013-06-24 18:41:06 +0200 | [diff] [blame] | 1153 | void cpu_single_step(CPUState *cpu, int enabled) |
bellard | c33a346 | 2003-07-29 20:50:33 +0000 | [diff] [blame] | 1154 | { |
Andreas Färber | ed2803d | 2013-06-21 20:20:45 +0200 | [diff] [blame] | 1155 | if (cpu->singlestep_enabled != enabled) { |
| 1156 | cpu->singlestep_enabled = enabled; |
| 1157 | if (kvm_enabled()) { |
Stefan Weil | 38e478e | 2013-07-25 20:50:21 +0200 | [diff] [blame] | 1158 | kvm_update_guest_debug(cpu, 0); |
Andreas Färber | ed2803d | 2013-06-21 20:20:45 +0200 | [diff] [blame] | 1159 | } else { |
Stuart Brady | ccbb4d4 | 2009-05-03 12:15:06 +0100 | [diff] [blame] | 1160 | /* must flush all the translated code to avoid inconsistencies */ |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 1161 | /* XXX: only flush what is necessary */ |
Peter Crosthwaite | bbd77c1 | 2015-06-23 19:31:15 -0700 | [diff] [blame] | 1162 | tb_flush(cpu); |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 1163 | } |
bellard | c33a346 | 2003-07-29 20:50:33 +0000 | [diff] [blame] | 1164 | } |
bellard | c33a346 | 2003-07-29 20:50:33 +0000 | [diff] [blame] | 1165 | } |
| 1166 | |
Andreas Färber | a47dddd | 2013-09-03 17:38:47 +0200 | [diff] [blame] | 1167 | void cpu_abort(CPUState *cpu, const char *fmt, ...) |
bellard | 7501267 | 2003-06-21 13:11:07 +0000 | [diff] [blame] | 1168 | { |
| 1169 | va_list ap; |
pbrook | 493ae1f | 2007-11-23 16:53:59 +0000 | [diff] [blame] | 1170 | va_list ap2; |
bellard | 7501267 | 2003-06-21 13:11:07 +0000 | [diff] [blame] | 1171 | |
| 1172 | va_start(ap, fmt); |
pbrook | 493ae1f | 2007-11-23 16:53:59 +0000 | [diff] [blame] | 1173 | va_copy(ap2, ap); |
bellard | 7501267 | 2003-06-21 13:11:07 +0000 | [diff] [blame] | 1174 | fprintf(stderr, "qemu: fatal: "); |
| 1175 | vfprintf(stderr, fmt, ap); |
| 1176 | fprintf(stderr, "\n"); |
Andreas Färber | 878096e | 2013-05-27 01:33:50 +0200 | [diff] [blame] | 1177 | cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_FPU | CPU_DUMP_CCOP); |
Paolo Bonzini | 013a294 | 2015-11-13 13:16:27 +0100 | [diff] [blame] | 1178 | if (qemu_log_separate()) { |
Richard Henderson | 1ee7321 | 2016-09-22 15:17:10 -0700 | [diff] [blame] | 1179 | qemu_log_lock(); |
aliguori | 93fcfe3 | 2009-01-15 22:34:14 +0000 | [diff] [blame] | 1180 | qemu_log("qemu: fatal: "); |
| 1181 | qemu_log_vprintf(fmt, ap2); |
| 1182 | qemu_log("\n"); |
Andreas Färber | a076285 | 2013-06-16 07:28:50 +0200 | [diff] [blame] | 1183 | log_cpu_state(cpu, CPU_DUMP_FPU | CPU_DUMP_CCOP); |
aliguori | 31b1a7b | 2009-01-15 22:35:09 +0000 | [diff] [blame] | 1184 | qemu_log_flush(); |
Richard Henderson | 1ee7321 | 2016-09-22 15:17:10 -0700 | [diff] [blame] | 1185 | qemu_log_unlock(); |
aliguori | 93fcfe3 | 2009-01-15 22:34:14 +0000 | [diff] [blame] | 1186 | qemu_log_close(); |
balrog | 924edca | 2007-06-10 14:07:13 +0000 | [diff] [blame] | 1187 | } |
pbrook | 493ae1f | 2007-11-23 16:53:59 +0000 | [diff] [blame] | 1188 | va_end(ap2); |
j_mayer | f937329 | 2007-09-29 12:18:20 +0000 | [diff] [blame] | 1189 | va_end(ap); |
Pavel Dovgalyuk | 7615936 | 2015-09-17 19:25:07 +0300 | [diff] [blame] | 1190 | replay_finish(); |
Riku Voipio | fd052bf | 2010-01-25 14:30:49 +0200 | [diff] [blame] | 1191 | #if defined(CONFIG_USER_ONLY) |
| 1192 | { |
| 1193 | struct sigaction act; |
| 1194 | sigfillset(&act.sa_mask); |
| 1195 | act.sa_handler = SIG_DFL; |
| 1196 | sigaction(SIGABRT, &act, NULL); |
| 1197 | } |
| 1198 | #endif |
bellard | 7501267 | 2003-06-21 13:11:07 +0000 | [diff] [blame] | 1199 | abort(); |
| 1200 | } |
| 1201 | |
bellard | 0124311 | 2004-01-04 15:48:17 +0000 | [diff] [blame] | 1202 | #if !defined(CONFIG_USER_ONLY) |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1203 | /* Called from RCU critical section */ |
Paolo Bonzini | 041603f | 2013-09-09 17:49:45 +0200 | [diff] [blame] | 1204 | static RAMBlock *qemu_get_ram_block(ram_addr_t addr) |
| 1205 | { |
| 1206 | RAMBlock *block; |
| 1207 | |
Paolo Bonzini | 4377153 | 2013-09-09 17:58:40 +0200 | [diff] [blame] | 1208 | block = atomic_rcu_read(&ram_list.mru_block); |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 1209 | if (block && addr - block->offset < block->max_length) { |
Paolo Bonzini | 68851b9 | 2015-10-22 13:51:30 +0200 | [diff] [blame] | 1210 | return block; |
Paolo Bonzini | 041603f | 2013-09-09 17:49:45 +0200 | [diff] [blame] | 1211 | } |
Peter Xu | 99e1558 | 2017-05-12 12:17:39 +0800 | [diff] [blame] | 1212 | RAMBLOCK_FOREACH(block) { |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 1213 | if (addr - block->offset < block->max_length) { |
Paolo Bonzini | 041603f | 2013-09-09 17:49:45 +0200 | [diff] [blame] | 1214 | goto found; |
| 1215 | } |
| 1216 | } |
| 1217 | |
| 1218 | fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); |
| 1219 | abort(); |
| 1220 | |
| 1221 | found: |
Paolo Bonzini | 4377153 | 2013-09-09 17:58:40 +0200 | [diff] [blame] | 1222 | /* It is safe to write mru_block outside the iothread lock. This |
| 1223 | * is what happens: |
| 1224 | * |
| 1225 | * mru_block = xxx |
| 1226 | * rcu_read_unlock() |
| 1227 | * xxx removed from list |
| 1228 | * rcu_read_lock() |
| 1229 | * read mru_block |
| 1230 | * mru_block = NULL; |
| 1231 | * call_rcu(reclaim_ramblock, xxx); |
| 1232 | * rcu_read_unlock() |
| 1233 | * |
| 1234 | * atomic_rcu_set is not needed here. The block was already published |
| 1235 | * when it was placed into the list. Here we're just making an extra |
| 1236 | * copy of the pointer. |
| 1237 | */ |
Paolo Bonzini | 041603f | 2013-09-09 17:49:45 +0200 | [diff] [blame] | 1238 | ram_list.mru_block = block; |
| 1239 | return block; |
| 1240 | } |
| 1241 | |
Juan Quintela | a2f4d5b | 2013-10-10 11:49:53 +0200 | [diff] [blame] | 1242 | static void tlb_reset_dirty_range_all(ram_addr_t start, ram_addr_t length) |
bellard | 1ccde1c | 2004-02-06 19:46:14 +0000 | [diff] [blame] | 1243 | { |
Peter Crosthwaite | 9a13565 | 2015-09-10 22:39:41 -0700 | [diff] [blame] | 1244 | CPUState *cpu; |
Paolo Bonzini | 041603f | 2013-09-09 17:49:45 +0200 | [diff] [blame] | 1245 | ram_addr_t start1; |
Juan Quintela | a2f4d5b | 2013-10-10 11:49:53 +0200 | [diff] [blame] | 1246 | RAMBlock *block; |
| 1247 | ram_addr_t end; |
| 1248 | |
| 1249 | end = TARGET_PAGE_ALIGN(start + length); |
| 1250 | start &= TARGET_PAGE_MASK; |
bellard | f23db16 | 2005-08-21 19:12:28 +0000 | [diff] [blame] | 1251 | |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1252 | rcu_read_lock(); |
Paolo Bonzini | 041603f | 2013-09-09 17:49:45 +0200 | [diff] [blame] | 1253 | block = qemu_get_ram_block(start); |
| 1254 | assert(block == qemu_get_ram_block(end - 1)); |
Yurii Zubrytskyi | b01ff82 | 2016-08-25 15:31:03 -0700 | [diff] [blame] | 1255 | (void)end; |
Michael S. Tsirkin | 1240be2 | 2014-11-12 11:44:41 +0200 | [diff] [blame] | 1256 | start1 = (uintptr_t)ramblock_ptr(block, start - block->offset); |
Peter Crosthwaite | 9a13565 | 2015-09-10 22:39:41 -0700 | [diff] [blame] | 1257 | CPU_FOREACH(cpu) { |
| 1258 | tlb_reset_dirty(cpu, start1, length); |
| 1259 | } |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1260 | rcu_read_unlock(); |
Juan Quintela | d24981d | 2012-05-22 00:42:40 +0200 | [diff] [blame] | 1261 | } |
| 1262 | |
| 1263 | /* Note: start and end must be within the same ram block. */ |
Stefan Hajnoczi | 03eebc9 | 2014-12-02 11:23:18 +0000 | [diff] [blame] | 1264 | bool cpu_physical_memory_test_and_clear_dirty(ram_addr_t start, |
| 1265 | ram_addr_t length, |
| 1266 | unsigned client) |
Juan Quintela | d24981d | 2012-05-22 00:42:40 +0200 | [diff] [blame] | 1267 | { |
Stefan Hajnoczi | 5b82b70 | 2016-01-25 13:33:20 +0000 | [diff] [blame] | 1268 | DirtyMemoryBlocks *blocks; |
Stefan Hajnoczi | 03eebc9 | 2014-12-02 11:23:18 +0000 | [diff] [blame] | 1269 | unsigned long end, page; |
Stefan Hajnoczi | 5b82b70 | 2016-01-25 13:33:20 +0000 | [diff] [blame] | 1270 | bool dirty = false; |
Juan Quintela | d24981d | 2012-05-22 00:42:40 +0200 | [diff] [blame] | 1271 | |
Stefan Hajnoczi | 03eebc9 | 2014-12-02 11:23:18 +0000 | [diff] [blame] | 1272 | if (length == 0) { |
| 1273 | return false; |
| 1274 | } |
| 1275 | |
| 1276 | end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS; |
| 1277 | page = start >> TARGET_PAGE_BITS; |
Stefan Hajnoczi | 5b82b70 | 2016-01-25 13:33:20 +0000 | [diff] [blame] | 1278 | |
| 1279 | rcu_read_lock(); |
| 1280 | |
| 1281 | blocks = atomic_rcu_read(&ram_list.dirty_memory[client]); |
| 1282 | |
| 1283 | while (page < end) { |
| 1284 | unsigned long idx = page / DIRTY_MEMORY_BLOCK_SIZE; |
| 1285 | unsigned long offset = page % DIRTY_MEMORY_BLOCK_SIZE; |
| 1286 | unsigned long num = MIN(end - page, DIRTY_MEMORY_BLOCK_SIZE - offset); |
| 1287 | |
| 1288 | dirty |= bitmap_test_and_clear_atomic(blocks->blocks[idx], |
| 1289 | offset, num); |
| 1290 | page += num; |
| 1291 | } |
| 1292 | |
| 1293 | rcu_read_unlock(); |
Stefan Hajnoczi | 03eebc9 | 2014-12-02 11:23:18 +0000 | [diff] [blame] | 1294 | |
| 1295 | if (dirty && tcg_enabled()) { |
Juan Quintela | a2f4d5b | 2013-10-10 11:49:53 +0200 | [diff] [blame] | 1296 | tlb_reset_dirty_range_all(start, length); |
Juan Quintela | d24981d | 2012-05-22 00:42:40 +0200 | [diff] [blame] | 1297 | } |
Stefan Hajnoczi | 03eebc9 | 2014-12-02 11:23:18 +0000 | [diff] [blame] | 1298 | |
| 1299 | return dirty; |
bellard | 1ccde1c | 2004-02-06 19:46:14 +0000 | [diff] [blame] | 1300 | } |
| 1301 | |
Gerd Hoffmann | 8deaf12 | 2017-04-21 11:16:25 +0200 | [diff] [blame] | 1302 | DirtyBitmapSnapshot *cpu_physical_memory_snapshot_and_clear_dirty |
| 1303 | (ram_addr_t start, ram_addr_t length, unsigned client) |
| 1304 | { |
| 1305 | DirtyMemoryBlocks *blocks; |
| 1306 | unsigned long align = 1UL << (TARGET_PAGE_BITS + BITS_PER_LEVEL); |
| 1307 | ram_addr_t first = QEMU_ALIGN_DOWN(start, align); |
| 1308 | ram_addr_t last = QEMU_ALIGN_UP(start + length, align); |
| 1309 | DirtyBitmapSnapshot *snap; |
| 1310 | unsigned long page, end, dest; |
| 1311 | |
| 1312 | snap = g_malloc0(sizeof(*snap) + |
| 1313 | ((last - first) >> (TARGET_PAGE_BITS + 3))); |
| 1314 | snap->start = first; |
| 1315 | snap->end = last; |
| 1316 | |
| 1317 | page = first >> TARGET_PAGE_BITS; |
| 1318 | end = last >> TARGET_PAGE_BITS; |
| 1319 | dest = 0; |
| 1320 | |
| 1321 | rcu_read_lock(); |
| 1322 | |
| 1323 | blocks = atomic_rcu_read(&ram_list.dirty_memory[client]); |
| 1324 | |
| 1325 | while (page < end) { |
| 1326 | unsigned long idx = page / DIRTY_MEMORY_BLOCK_SIZE; |
| 1327 | unsigned long offset = page % DIRTY_MEMORY_BLOCK_SIZE; |
| 1328 | unsigned long num = MIN(end - page, DIRTY_MEMORY_BLOCK_SIZE - offset); |
| 1329 | |
| 1330 | assert(QEMU_IS_ALIGNED(offset, (1 << BITS_PER_LEVEL))); |
| 1331 | assert(QEMU_IS_ALIGNED(num, (1 << BITS_PER_LEVEL))); |
| 1332 | offset >>= BITS_PER_LEVEL; |
| 1333 | |
| 1334 | bitmap_copy_and_clear_atomic(snap->dirty + dest, |
| 1335 | blocks->blocks[idx] + offset, |
| 1336 | num); |
| 1337 | page += num; |
| 1338 | dest += num >> BITS_PER_LEVEL; |
| 1339 | } |
| 1340 | |
| 1341 | rcu_read_unlock(); |
| 1342 | |
| 1343 | if (tcg_enabled()) { |
| 1344 | tlb_reset_dirty_range_all(start, length); |
| 1345 | } |
| 1346 | |
| 1347 | return snap; |
| 1348 | } |
| 1349 | |
| 1350 | bool cpu_physical_memory_snapshot_get_dirty(DirtyBitmapSnapshot *snap, |
| 1351 | ram_addr_t start, |
| 1352 | ram_addr_t length) |
| 1353 | { |
| 1354 | unsigned long page, end; |
| 1355 | |
| 1356 | assert(start >= snap->start); |
| 1357 | assert(start + length <= snap->end); |
| 1358 | |
| 1359 | end = TARGET_PAGE_ALIGN(start + length - snap->start) >> TARGET_PAGE_BITS; |
| 1360 | page = (start - snap->start) >> TARGET_PAGE_BITS; |
| 1361 | |
| 1362 | while (page < end) { |
| 1363 | if (test_bit(page, snap->dirty)) { |
| 1364 | return true; |
| 1365 | } |
| 1366 | page++; |
| 1367 | } |
| 1368 | return false; |
| 1369 | } |
| 1370 | |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 1371 | /* Called from RCU critical section */ |
Andreas Färber | bb0e627 | 2013-09-03 13:32:01 +0200 | [diff] [blame] | 1372 | hwaddr memory_region_section_get_iotlb(CPUState *cpu, |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 1373 | MemoryRegionSection *section, |
| 1374 | target_ulong vaddr, |
| 1375 | hwaddr paddr, hwaddr xlat, |
| 1376 | int prot, |
| 1377 | target_ulong *address) |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 1378 | { |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 1379 | hwaddr iotlb; |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 1380 | CPUWatchpoint *wp; |
| 1381 | |
Blue Swirl | cc5bea6 | 2012-04-14 14:56:48 +0000 | [diff] [blame] | 1382 | if (memory_region_is_ram(section->mr)) { |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 1383 | /* Normal RAM. */ |
Paolo Bonzini | e4e6979 | 2016-03-01 10:44:50 +0100 | [diff] [blame] | 1384 | iotlb = memory_region_get_ram_addr(section->mr) + xlat; |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 1385 | if (!section->readonly) { |
Liu Ping Fan | b41aac4 | 2013-05-29 11:09:17 +0200 | [diff] [blame] | 1386 | iotlb |= PHYS_SECTION_NOTDIRTY; |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 1387 | } else { |
Liu Ping Fan | b41aac4 | 2013-05-29 11:09:17 +0200 | [diff] [blame] | 1388 | iotlb |= PHYS_SECTION_ROM; |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 1389 | } |
| 1390 | } else { |
Peter Maydell | 0b8e2c1 | 2015-07-20 12:27:16 +0100 | [diff] [blame] | 1391 | AddressSpaceDispatch *d; |
| 1392 | |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 1393 | d = flatview_to_dispatch(section->fv); |
Peter Maydell | 0b8e2c1 | 2015-07-20 12:27:16 +0100 | [diff] [blame] | 1394 | iotlb = section - d->map.sections; |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 1395 | iotlb += xlat; |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 1396 | } |
| 1397 | |
| 1398 | /* Make accesses to pages with watchpoints go via the |
| 1399 | watchpoint trap routines. */ |
Andreas Färber | ff4700b | 2013-08-26 18:23:18 +0200 | [diff] [blame] | 1400 | QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { |
Peter Maydell | 05068c0 | 2014-09-12 14:06:48 +0100 | [diff] [blame] | 1401 | if (cpu_watchpoint_address_matches(wp, vaddr, TARGET_PAGE_SIZE)) { |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 1402 | /* Avoid trapping reads of pages with a write breakpoint. */ |
| 1403 | if ((prot & PAGE_WRITE) || (wp->flags & BP_MEM_READ)) { |
Liu Ping Fan | b41aac4 | 2013-05-29 11:09:17 +0200 | [diff] [blame] | 1404 | iotlb = PHYS_SECTION_WATCH + paddr; |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 1405 | *address |= TLB_MMIO; |
| 1406 | break; |
| 1407 | } |
| 1408 | } |
| 1409 | } |
| 1410 | |
| 1411 | return iotlb; |
| 1412 | } |
bellard | 9fa3e85 | 2004-01-04 18:06:42 +0000 | [diff] [blame] | 1413 | #endif /* defined(CONFIG_USER_ONLY) */ |
| 1414 | |
pbrook | e2eef17 | 2008-06-08 01:09:01 +0000 | [diff] [blame] | 1415 | #if !defined(CONFIG_USER_ONLY) |
pbrook | 8da3ff1 | 2008-12-01 18:59:50 +0000 | [diff] [blame] | 1416 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 1417 | static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 1418 | uint16_t section); |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 1419 | static subpage_t *subpage_init(FlatView *fv, hwaddr base); |
Avi Kivity | 54688b1 | 2012-02-09 17:34:32 +0200 | [diff] [blame] | 1420 | |
Marcel Apfelbaum | 06329cce | 2017-12-13 16:37:37 +0200 | [diff] [blame] | 1421 | static void *(*phys_mem_alloc)(size_t size, uint64_t *align, bool shared) = |
Igor Mammedov | a2b257d | 2014-10-31 16:38:37 +0000 | [diff] [blame] | 1422 | qemu_anon_ram_alloc; |
Markus Armbruster | 91138037 | 2013-07-31 15:11:08 +0200 | [diff] [blame] | 1423 | |
| 1424 | /* |
| 1425 | * Set a custom physical guest memory alloator. |
| 1426 | * Accelerators with unusual needs may need this. Hopefully, we can |
| 1427 | * get rid of it eventually. |
| 1428 | */ |
Marcel Apfelbaum | 06329cce | 2017-12-13 16:37:37 +0200 | [diff] [blame] | 1429 | void phys_mem_set_alloc(void *(*alloc)(size_t, uint64_t *align, bool shared)) |
Markus Armbruster | 91138037 | 2013-07-31 15:11:08 +0200 | [diff] [blame] | 1430 | { |
| 1431 | phys_mem_alloc = alloc; |
| 1432 | } |
| 1433 | |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 1434 | static uint16_t phys_section_add(PhysPageMap *map, |
| 1435 | MemoryRegionSection *section) |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 1436 | { |
Paolo Bonzini | 68f3f65 | 2013-05-07 11:30:23 +0200 | [diff] [blame] | 1437 | /* The physical section number is ORed with a page-aligned |
| 1438 | * pointer to produce the iotlb entries. Thus it should |
| 1439 | * never overflow into the page-aligned value. |
| 1440 | */ |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 1441 | assert(map->sections_nb < TARGET_PAGE_SIZE); |
Paolo Bonzini | 68f3f65 | 2013-05-07 11:30:23 +0200 | [diff] [blame] | 1442 | |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 1443 | if (map->sections_nb == map->sections_nb_alloc) { |
| 1444 | map->sections_nb_alloc = MAX(map->sections_nb_alloc * 2, 16); |
| 1445 | map->sections = g_renew(MemoryRegionSection, map->sections, |
| 1446 | map->sections_nb_alloc); |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 1447 | } |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 1448 | map->sections[map->sections_nb] = *section; |
Paolo Bonzini | dfde4e6 | 2013-05-06 10:46:11 +0200 | [diff] [blame] | 1449 | memory_region_ref(section->mr); |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 1450 | return map->sections_nb++; |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 1451 | } |
| 1452 | |
Paolo Bonzini | 058bc4b | 2013-06-25 09:30:48 +0200 | [diff] [blame] | 1453 | static void phys_section_destroy(MemoryRegion *mr) |
| 1454 | { |
Don Slutz | 55b4e80 | 2015-11-30 17:11:04 -0500 | [diff] [blame] | 1455 | bool have_sub_page = mr->subpage; |
| 1456 | |
Paolo Bonzini | dfde4e6 | 2013-05-06 10:46:11 +0200 | [diff] [blame] | 1457 | memory_region_unref(mr); |
| 1458 | |
Don Slutz | 55b4e80 | 2015-11-30 17:11:04 -0500 | [diff] [blame] | 1459 | if (have_sub_page) { |
Paolo Bonzini | 058bc4b | 2013-06-25 09:30:48 +0200 | [diff] [blame] | 1460 | subpage_t *subpage = container_of(mr, subpage_t, iomem); |
Peter Crosthwaite | b4fefef | 2014-06-05 23:15:52 -0700 | [diff] [blame] | 1461 | object_unref(OBJECT(&subpage->iomem)); |
Paolo Bonzini | 058bc4b | 2013-06-25 09:30:48 +0200 | [diff] [blame] | 1462 | g_free(subpage); |
| 1463 | } |
| 1464 | } |
| 1465 | |
Paolo Bonzini | 6092666 | 2013-05-29 12:30:26 +0200 | [diff] [blame] | 1466 | static void phys_sections_free(PhysPageMap *map) |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 1467 | { |
Paolo Bonzini | 9affd6f | 2013-05-29 12:09:47 +0200 | [diff] [blame] | 1468 | while (map->sections_nb > 0) { |
| 1469 | MemoryRegionSection *section = &map->sections[--map->sections_nb]; |
Paolo Bonzini | 058bc4b | 2013-06-25 09:30:48 +0200 | [diff] [blame] | 1470 | phys_section_destroy(section->mr); |
| 1471 | } |
Paolo Bonzini | 9affd6f | 2013-05-29 12:09:47 +0200 | [diff] [blame] | 1472 | g_free(map->sections); |
| 1473 | g_free(map->nodes); |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 1474 | } |
| 1475 | |
Alexey Kardashevskiy | 9950322 | 2017-09-21 18:50:59 +1000 | [diff] [blame] | 1476 | static void register_subpage(FlatView *fv, MemoryRegionSection *section) |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1477 | { |
Alexey Kardashevskiy | 9950322 | 2017-09-21 18:50:59 +1000 | [diff] [blame] | 1478 | AddressSpaceDispatch *d = flatview_to_dispatch(fv); |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1479 | subpage_t *subpage; |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 1480 | hwaddr base = section->offset_within_address_space |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1481 | & TARGET_PAGE_MASK; |
Peter Xu | 003a0cf | 2017-05-15 16:50:57 +0800 | [diff] [blame] | 1482 | MemoryRegionSection *existing = phys_page_find(d, base); |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1483 | MemoryRegionSection subsection = { |
| 1484 | .offset_within_address_space = base, |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1485 | .size = int128_make64(TARGET_PAGE_SIZE), |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1486 | }; |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 1487 | hwaddr start, end; |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1488 | |
Avi Kivity | f3705d5 | 2012-03-08 16:16:34 +0200 | [diff] [blame] | 1489 | assert(existing->mr->subpage || existing->mr == &io_mem_unassigned); |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1490 | |
Avi Kivity | f3705d5 | 2012-03-08 16:16:34 +0200 | [diff] [blame] | 1491 | if (!(existing->mr->subpage)) { |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 1492 | subpage = subpage_init(fv, base); |
| 1493 | subsection.fv = fv; |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1494 | subsection.mr = &subpage->iomem; |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 1495 | phys_page_set(d, base >> TARGET_PAGE_BITS, 1, |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 1496 | phys_section_add(&d->map, &subsection)); |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1497 | } else { |
Avi Kivity | f3705d5 | 2012-03-08 16:16:34 +0200 | [diff] [blame] | 1498 | subpage = container_of(existing->mr, subpage_t, iomem); |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1499 | } |
| 1500 | start = section->offset_within_address_space & ~TARGET_PAGE_MASK; |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1501 | end = start + int128_get64(section->size) - 1; |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 1502 | subpage_register(subpage, start, end, |
| 1503 | phys_section_add(&d->map, section)); |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1504 | } |
| 1505 | |
| 1506 | |
Alexey Kardashevskiy | 9950322 | 2017-09-21 18:50:59 +1000 | [diff] [blame] | 1507 | static void register_multipage(FlatView *fv, |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1508 | MemoryRegionSection *section) |
bellard | 33417e7 | 2003-08-10 21:47:01 +0000 | [diff] [blame] | 1509 | { |
Alexey Kardashevskiy | 9950322 | 2017-09-21 18:50:59 +1000 | [diff] [blame] | 1510 | AddressSpaceDispatch *d = flatview_to_dispatch(fv); |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 1511 | hwaddr start_addr = section->offset_within_address_space; |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 1512 | uint16_t section_index = phys_section_add(&d->map, section); |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1513 | uint64_t num_pages = int128_get64(int128_rshift(section->size, |
| 1514 | TARGET_PAGE_BITS)); |
Avi Kivity | dd81124 | 2012-01-02 12:17:03 +0200 | [diff] [blame] | 1515 | |
Paolo Bonzini | 733d5ef | 2013-05-27 10:47:10 +0200 | [diff] [blame] | 1516 | assert(num_pages); |
| 1517 | phys_page_set(d, start_addr >> TARGET_PAGE_BITS, num_pages, section_index); |
bellard | 33417e7 | 2003-08-10 21:47:01 +0000 | [diff] [blame] | 1518 | } |
| 1519 | |
Erwin Jansen | ec22dc9 | 2018-07-24 10:32:25 -0700 | [diff] [blame] | 1520 | void flatview_add_to_dispatch(struct FlatView *fv, MemoryRegionSection *section) |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1521 | { |
Paolo Bonzini | 99b9cc0 | 2013-05-27 13:18:01 +0200 | [diff] [blame] | 1522 | MemoryRegionSection now = *section, remain = *section; |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1523 | Int128 page_size = int128_make64(TARGET_PAGE_SIZE); |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1524 | |
Paolo Bonzini | 733d5ef | 2013-05-27 10:47:10 +0200 | [diff] [blame] | 1525 | if (now.offset_within_address_space & ~TARGET_PAGE_MASK) { |
| 1526 | uint64_t left = TARGET_PAGE_ALIGN(now.offset_within_address_space) |
| 1527 | - now.offset_within_address_space; |
| 1528 | |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1529 | now.size = int128_min(int128_make64(left), now.size); |
Alexey Kardashevskiy | 9950322 | 2017-09-21 18:50:59 +1000 | [diff] [blame] | 1530 | register_subpage(fv, &now); |
Paolo Bonzini | 733d5ef | 2013-05-27 10:47:10 +0200 | [diff] [blame] | 1531 | } else { |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1532 | now.size = int128_zero(); |
Paolo Bonzini | 733d5ef | 2013-05-27 10:47:10 +0200 | [diff] [blame] | 1533 | } |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1534 | while (int128_ne(remain.size, now.size)) { |
| 1535 | remain.size = int128_sub(remain.size, now.size); |
| 1536 | remain.offset_within_address_space += int128_get64(now.size); |
| 1537 | remain.offset_within_region += int128_get64(now.size); |
Tyler Hall | 69b6764 | 2012-07-25 18:45:04 -0400 | [diff] [blame] | 1538 | now = remain; |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1539 | if (int128_lt(remain.size, page_size)) { |
Alexey Kardashevskiy | 9950322 | 2017-09-21 18:50:59 +1000 | [diff] [blame] | 1540 | register_subpage(fv, &now); |
Hu Tao | 8826624 | 2013-08-29 18:21:16 +0800 | [diff] [blame] | 1541 | } else if (remain.offset_within_address_space & ~TARGET_PAGE_MASK) { |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1542 | now.size = page_size; |
Alexey Kardashevskiy | 9950322 | 2017-09-21 18:50:59 +1000 | [diff] [blame] | 1543 | register_subpage(fv, &now); |
Tyler Hall | 69b6764 | 2012-07-25 18:45:04 -0400 | [diff] [blame] | 1544 | } else { |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1545 | now.size = int128_and(now.size, int128_neg(page_size)); |
Alexey Kardashevskiy | 9950322 | 2017-09-21 18:50:59 +1000 | [diff] [blame] | 1546 | register_multipage(fv, &now); |
Tyler Hall | 69b6764 | 2012-07-25 18:45:04 -0400 | [diff] [blame] | 1547 | } |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1548 | } |
| 1549 | } |
| 1550 | |
Sheng Yang | 62a2744 | 2010-01-26 19:21:16 +0800 | [diff] [blame] | 1551 | void qemu_flush_coalesced_mmio_buffer(void) |
| 1552 | { |
| 1553 | if (kvm_enabled()) |
| 1554 | kvm_flush_coalesced_mmio_buffer(); |
| 1555 | } |
| 1556 | |
Umesh Deshpande | b2a8658 | 2011-08-17 00:01:33 -0700 | [diff] [blame] | 1557 | void qemu_mutex_lock_ramlist(void) |
| 1558 | { |
| 1559 | qemu_mutex_lock(&ram_list.mutex); |
| 1560 | } |
| 1561 | |
| 1562 | void qemu_mutex_unlock_ramlist(void) |
| 1563 | { |
| 1564 | qemu_mutex_unlock(&ram_list.mutex); |
| 1565 | } |
| 1566 | |
Peter Xu | be9b23c | 2017-05-12 12:17:41 +0800 | [diff] [blame] | 1567 | void ram_block_dump(Monitor *mon) |
| 1568 | { |
| 1569 | RAMBlock *block; |
| 1570 | char *psize; |
| 1571 | |
| 1572 | rcu_read_lock(); |
| 1573 | monitor_printf(mon, "%24s %8s %18s %18s %18s\n", |
| 1574 | "Block Name", "PSize", "Offset", "Used", "Total"); |
| 1575 | RAMBLOCK_FOREACH(block) { |
| 1576 | psize = size_to_str(block->page_size); |
| 1577 | monitor_printf(mon, "%24s %8s 0x%016" PRIx64 " 0x%016" PRIx64 |
| 1578 | " 0x%016" PRIx64 "\n", block->idstr, psize, |
| 1579 | (uint64_t)block->offset, |
| 1580 | (uint64_t)block->used_length, |
| 1581 | (uint64_t)block->max_length); |
| 1582 | g_free(psize); |
| 1583 | } |
| 1584 | rcu_read_unlock(); |
| 1585 | } |
| 1586 | |
Markus Armbruster | e1e84ba | 2013-07-31 15:11:10 +0200 | [diff] [blame] | 1587 | #ifdef __linux__ |
Alexey Kardashevskiy | 9c60766 | 2017-03-02 13:36:11 +1100 | [diff] [blame] | 1588 | /* |
| 1589 | * FIXME TOCTTOU: this iterates over memory backends' mem-path, which |
| 1590 | * may or may not name the same files / on the same filesystem now as |
| 1591 | * when we actually open and map them. Iterate over the file |
| 1592 | * descriptors instead, and use qemu_fd_getpagesize(). |
| 1593 | */ |
| 1594 | static int find_max_supported_pagesize(Object *obj, void *opaque) |
| 1595 | { |
| 1596 | char *mem_path; |
| 1597 | long *hpsize_min = opaque; |
| 1598 | |
| 1599 | if (object_dynamic_cast(obj, TYPE_MEMORY_BACKEND)) { |
| 1600 | mem_path = object_property_get_str(obj, "mem-path", NULL); |
| 1601 | if (mem_path) { |
| 1602 | long hpsize = qemu_mempath_getpagesize(mem_path); |
Greg Kurz | 72a841d | 2018-03-29 11:09:46 +0200 | [diff] [blame] | 1603 | g_free(mem_path); |
Alexey Kardashevskiy | 9c60766 | 2017-03-02 13:36:11 +1100 | [diff] [blame] | 1604 | if (hpsize < *hpsize_min) { |
| 1605 | *hpsize_min = hpsize; |
| 1606 | } |
| 1607 | } else { |
| 1608 | *hpsize_min = getpagesize(); |
| 1609 | } |
| 1610 | } |
| 1611 | |
| 1612 | return 0; |
| 1613 | } |
| 1614 | |
| 1615 | long qemu_getrampagesize(void) |
| 1616 | { |
| 1617 | long hpsize = LONG_MAX; |
| 1618 | long mainrampagesize; |
| 1619 | Object *memdev_root; |
| 1620 | |
| 1621 | if (mem_path) { |
| 1622 | mainrampagesize = qemu_mempath_getpagesize(mem_path); |
| 1623 | } else { |
| 1624 | mainrampagesize = getpagesize(); |
| 1625 | } |
| 1626 | |
| 1627 | /* it's possible we have memory-backend objects with |
| 1628 | * hugepage-backed RAM. these may get mapped into system |
| 1629 | * address space via -numa parameters or memory hotplug |
| 1630 | * hooks. we want to take these into account, but we |
| 1631 | * also want to make sure these supported hugepage |
| 1632 | * sizes are applicable across the entire range of memory |
| 1633 | * we may boot from, so we take the min across all |
| 1634 | * backends, and assume normal pages in cases where a |
| 1635 | * backend isn't backed by hugepages. |
| 1636 | */ |
| 1637 | memdev_root = object_resolve_path("/objects", NULL); |
| 1638 | if (memdev_root) { |
| 1639 | object_child_foreach(memdev_root, find_max_supported_pagesize, &hpsize); |
| 1640 | } |
| 1641 | if (hpsize == LONG_MAX) { |
| 1642 | /* No additional memory regions found ==> Report main RAM page size */ |
| 1643 | return mainrampagesize; |
| 1644 | } |
| 1645 | |
| 1646 | /* If NUMA is disabled or the NUMA nodes are not backed with a |
| 1647 | * memory-backend, then there is at least one node using "normal" RAM, |
| 1648 | * so if its page size is smaller we have got to report that size instead. |
| 1649 | */ |
| 1650 | if (hpsize > mainrampagesize && |
| 1651 | (nb_numa_nodes == 0 || numa_info[0].node_memdev == NULL)) { |
| 1652 | static bool warned; |
| 1653 | if (!warned) { |
| 1654 | error_report("Huge page support disabled (n/a for main memory)."); |
| 1655 | warned = true; |
| 1656 | } |
| 1657 | return mainrampagesize; |
| 1658 | } |
| 1659 | |
| 1660 | return hpsize; |
| 1661 | } |
| 1662 | #else |
| 1663 | long qemu_getrampagesize(void) |
| 1664 | { |
| 1665 | return getpagesize(); |
| 1666 | } |
| 1667 | #endif |
| 1668 | |
Haozhong Zhang | d6af99c | 2016-10-27 12:22:58 +0800 | [diff] [blame] | 1669 | static int64_t get_file_size(int fd) |
| 1670 | { |
| 1671 | int64_t size = lseek(fd, 0, SEEK_END); |
| 1672 | if (size < 0) { |
| 1673 | return -errno; |
| 1674 | } |
| 1675 | return size; |
| 1676 | } |
| 1677 | |
Lingfeng Yang | cda0ba9 | 2018-08-15 14:58:15 -0700 | [diff] [blame] | 1678 | static int try_open_existing_ram_file(const char* path) { |
| 1679 | int fd = -1; |
| 1680 | |
| 1681 | // If an existing file is 4GB, Windows open() by itself fails. |
| 1682 | // So use CreateFile() instead. |
| 1683 | #ifdef _WIN32 |
| 1684 | HANDLE fh = |
Lingfeng Yang | 1a0e044 | 2018-08-29 19:20:36 -0700 | [diff] [blame] | 1685 | win32CreateFile( |
Lingfeng Yang | cda0ba9 | 2018-08-15 14:58:15 -0700 | [diff] [blame] | 1686 | path, |
| 1687 | // Must be both, or we cannot CreateFileMapping with PAGE_READWRITE |
| 1688 | GENERIC_READ | GENERIC_WRITE, |
| 1689 | // Need both read and write sharing to enable multiple instances. |
| 1690 | // Even though we will not really be writing to the RAM file with |
| 1691 | // multiple instances, the file needs to be opened to allow us to |
| 1692 | // proceed. |
| 1693 | FILE_SHARE_READ | FILE_SHARE_WRITE, |
| 1694 | NULL, |
| 1695 | // Need to fail on file-not-found to follow the same path as QEMU |
| 1696 | OPEN_EXISTING, |
| 1697 | FILE_ATTRIBUTE_NORMAL, |
| 1698 | NULL); |
| 1699 | fd = _open_osfhandle((intptr_t)fh, _O_RDWR); |
| 1700 | #else |
| 1701 | fd = open(path, O_RDWR); |
| 1702 | #endif |
| 1703 | |
| 1704 | return fd; |
| 1705 | } |
| 1706 | |
Marc-André Lureau | 8d37b03 | 2017-06-02 18:12:22 +0400 | [diff] [blame] | 1707 | static int file_ram_open(const char *path, |
| 1708 | const char *region_name, |
| 1709 | bool *created, |
| 1710 | Error **errp) |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1711 | { |
| 1712 | char *filename; |
Peter Feiner | 8ca761f | 2013-03-04 13:54:25 -0500 | [diff] [blame] | 1713 | char *sanitized_name; |
| 1714 | char *c; |
Paolo Bonzini | 5c3ece7 | 2016-03-17 15:53:13 +0100 | [diff] [blame] | 1715 | int fd = -1; |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1716 | |
Marc-André Lureau | 8d37b03 | 2017-06-02 18:12:22 +0400 | [diff] [blame] | 1717 | *created = false; |
Markus Armbruster | fd97fd4 | 2016-03-07 20:25:13 +0100 | [diff] [blame] | 1718 | for (;;) { |
Lingfeng Yang | cda0ba9 | 2018-08-15 14:58:15 -0700 | [diff] [blame] | 1719 | |
| 1720 | fd = try_open_existing_ram_file(path); |
| 1721 | |
Markus Armbruster | fd97fd4 | 2016-03-07 20:25:13 +0100 | [diff] [blame] | 1722 | if (fd >= 0) { |
| 1723 | /* @path names an existing file, use it */ |
| 1724 | break; |
| 1725 | } |
Lingfeng Yang | 4201b33 | 2018-08-16 14:45:51 -0700 | [diff] [blame] | 1726 | #ifdef _WIN32 |
| 1727 | // CreateFile on a nonexistent file in Windows returns EBADF. |
| 1728 | if (errno == ENOENT || errno == EBADF) { |
| 1729 | #else |
Markus Armbruster | fd97fd4 | 2016-03-07 20:25:13 +0100 | [diff] [blame] | 1730 | if (errno == ENOENT) { |
Lingfeng Yang | 4201b33 | 2018-08-16 14:45:51 -0700 | [diff] [blame] | 1731 | #endif |
Markus Armbruster | fd97fd4 | 2016-03-07 20:25:13 +0100 | [diff] [blame] | 1732 | /* @path names a file that doesn't exist, create it */ |
| 1733 | fd = open(path, O_RDWR | O_CREAT | O_EXCL, 0644); |
| 1734 | if (fd >= 0) { |
Marc-André Lureau | 8d37b03 | 2017-06-02 18:12:22 +0400 | [diff] [blame] | 1735 | *created = true; |
Markus Armbruster | fd97fd4 | 2016-03-07 20:25:13 +0100 | [diff] [blame] | 1736 | break; |
| 1737 | } |
| 1738 | } else if (errno == EISDIR) { |
| 1739 | /* @path names a directory, create a file there */ |
| 1740 | /* Make name safe to use with mkstemp by replacing '/' with '_'. */ |
Marc-André Lureau | 8d37b03 | 2017-06-02 18:12:22 +0400 | [diff] [blame] | 1741 | sanitized_name = g_strdup(region_name); |
Markus Armbruster | fd97fd4 | 2016-03-07 20:25:13 +0100 | [diff] [blame] | 1742 | for (c = sanitized_name; *c != '\0'; c++) { |
| 1743 | if (*c == '/') { |
| 1744 | *c = '_'; |
| 1745 | } |
| 1746 | } |
| 1747 | |
| 1748 | filename = g_strdup_printf("%s/qemu_back_mem.%s.XXXXXX", path, |
| 1749 | sanitized_name); |
| 1750 | g_free(sanitized_name); |
| 1751 | |
| 1752 | fd = mkstemp(filename); |
| 1753 | if (fd >= 0) { |
| 1754 | unlink(filename); |
| 1755 | g_free(filename); |
| 1756 | break; |
| 1757 | } |
| 1758 | g_free(filename); |
| 1759 | } |
| 1760 | if (errno != EEXIST && errno != EINTR) { |
| 1761 | error_setg_errno(errp, errno, |
| 1762 | "can't open backing store %s for guest RAM", |
| 1763 | path); |
Marc-André Lureau | 8d37b03 | 2017-06-02 18:12:22 +0400 | [diff] [blame] | 1764 | return -1; |
Markus Armbruster | fd97fd4 | 2016-03-07 20:25:13 +0100 | [diff] [blame] | 1765 | } |
| 1766 | /* |
| 1767 | * Try again on EINTR and EEXIST. The latter happens when |
| 1768 | * something else creates the file between our two open(). |
| 1769 | */ |
| 1770 | } |
| 1771 | |
Marc-André Lureau | 8d37b03 | 2017-06-02 18:12:22 +0400 | [diff] [blame] | 1772 | return fd; |
| 1773 | } |
| 1774 | |
| 1775 | static void *file_ram_alloc(RAMBlock *block, |
| 1776 | ram_addr_t memory, |
| 1777 | int fd, |
| 1778 | bool truncate, |
| 1779 | Error **errp) |
| 1780 | { |
| 1781 | void *area; |
| 1782 | |
Dr. David Alan Gilbert | 863e962 | 2016-09-29 20:09:37 +0100 | [diff] [blame] | 1783 | block->page_size = qemu_fd_getpagesize(fd); |
Haozhong Zhang | 9837684 | 2017-12-11 15:28:04 +0800 | [diff] [blame] | 1784 | if (block->mr->align % block->page_size) { |
| 1785 | error_setg(errp, "alignment 0x%" PRIx64 |
| 1786 | " must be multiples of page size 0x%zx", |
| 1787 | block->mr->align, block->page_size); |
| 1788 | return NULL; |
| 1789 | } |
| 1790 | block->mr->align = MAX(block->page_size, block->mr->align); |
Haozhong Zhang | 8360668 | 2016-10-24 20:49:37 +0800 | [diff] [blame] | 1791 | #if defined(__s390x__) |
| 1792 | if (kvm_enabled()) { |
| 1793 | block->mr->align = MAX(block->mr->align, QEMU_VMALLOC_ALIGN); |
| 1794 | } |
| 1795 | #endif |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1796 | |
Dr. David Alan Gilbert | 863e962 | 2016-09-29 20:09:37 +0100 | [diff] [blame] | 1797 | if (memory < block->page_size) { |
Hu Tao | 557529d | 2014-09-09 13:28:00 +0800 | [diff] [blame] | 1798 | error_setg(errp, "memory size 0x" RAM_ADDR_FMT " must be equal to " |
Dr. David Alan Gilbert | 863e962 | 2016-09-29 20:09:37 +0100 | [diff] [blame] | 1799 | "or larger than page size 0x%zx", |
| 1800 | memory, block->page_size); |
Marc-André Lureau | 8d37b03 | 2017-06-02 18:12:22 +0400 | [diff] [blame] | 1801 | return NULL; |
Haozhong Zhang | 1775f11 | 2016-11-02 09:05:51 +0800 | [diff] [blame] | 1802 | } |
| 1803 | |
Dr. David Alan Gilbert | 863e962 | 2016-09-29 20:09:37 +0100 | [diff] [blame] | 1804 | memory = ROUND_UP(memory, block->page_size); |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1805 | |
| 1806 | /* |
| 1807 | * ftruncate is not supported by hugetlbfs in older |
| 1808 | * hosts, so don't bother bailing out on errors. |
| 1809 | * If anything goes wrong with it under other filesystems, |
| 1810 | * mmap will fail. |
Haozhong Zhang | d6af99c | 2016-10-27 12:22:58 +0800 | [diff] [blame] | 1811 | * |
| 1812 | * Do not truncate the non-empty backend file to avoid corrupting |
| 1813 | * the existing data in the file. Disabling shrinking is not |
| 1814 | * enough. For example, the current vNVDIMM implementation stores |
| 1815 | * the guest NVDIMM labels at the end of the backend file. If the |
| 1816 | * backend file is later extended, QEMU will not be able to find |
| 1817 | * those labels. Therefore, extending the non-empty backend file |
| 1818 | * is disabled as well. |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1819 | */ |
Marc-André Lureau | 8d37b03 | 2017-06-02 18:12:22 +0400 | [diff] [blame] | 1820 | if (truncate && ftruncate(fd, memory)) { |
Yoshiaki Tamura | 9742bf2 | 2010-08-18 13:30:13 +0900 | [diff] [blame] | 1821 | perror("ftruncate"); |
Paolo Bonzini | 7f56e74 | 2014-05-14 17:43:20 +0800 | [diff] [blame] | 1822 | } |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1823 | |
Dominik Dingel | d2f39ad | 2016-04-25 13:55:38 +0200 | [diff] [blame] | 1824 | area = qemu_ram_mmap(fd, memory, block->mr->align, |
| 1825 | block->flags & RAM_SHARED); |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1826 | if (area == MAP_FAILED) { |
Paolo Bonzini | 7f56e74 | 2014-05-14 17:43:20 +0800 | [diff] [blame] | 1827 | error_setg_errno(errp, errno, |
Markus Armbruster | fd97fd4 | 2016-03-07 20:25:13 +0100 | [diff] [blame] | 1828 | "unable to map backing store for guest RAM"); |
Marc-André Lureau | 8d37b03 | 2017-06-02 18:12:22 +0400 | [diff] [blame] | 1829 | return NULL; |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1830 | } |
Marcelo Tosatti | ef36fa1 | 2013-10-28 18:51:46 -0200 | [diff] [blame] | 1831 | |
| 1832 | if (mem_prealloc) { |
Jitendra Kolhe | 1e356fc | 2017-02-24 09:01:43 +0530 | [diff] [blame] | 1833 | os_mem_prealloc(fd, area, memory, smp_cpus, errp); |
Igor Mammedov | 056b68a | 2016-07-20 11:54:03 +0200 | [diff] [blame] | 1834 | if (errp && *errp) { |
Marc-André Lureau | 8d37b03 | 2017-06-02 18:12:22 +0400 | [diff] [blame] | 1835 | qemu_ram_munmap(area, memory); |
| 1836 | return NULL; |
Igor Mammedov | 056b68a | 2016-07-20 11:54:03 +0200 | [diff] [blame] | 1837 | } |
Marcelo Tosatti | ef36fa1 | 2013-10-28 18:51:46 -0200 | [diff] [blame] | 1838 | } |
| 1839 | |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1840 | block->fd = fd; |
Lingfeng Yang | cda0ba9 | 2018-08-15 14:58:15 -0700 | [diff] [blame] | 1841 | block->mapped_size = memory; |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1842 | return area; |
| 1843 | } |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1844 | |
Dr. David Alan Gilbert | 154cc9e | 2018-01-05 17:01:37 +0000 | [diff] [blame] | 1845 | /* Allocate space within the ram_addr_t space that governs the |
| 1846 | * dirty bitmaps. |
| 1847 | * Called with the ramlist lock held. |
| 1848 | */ |
Alex Williamson | d17b528 | 2010-06-25 11:08:38 -0600 | [diff] [blame] | 1849 | static ram_addr_t find_ram_offset(ram_addr_t size) |
| 1850 | { |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1851 | RAMBlock *block, *next_block; |
Alex Williamson | 3e837b2 | 2011-10-31 08:54:09 -0600 | [diff] [blame] | 1852 | ram_addr_t offset = RAM_ADDR_MAX, mingap = RAM_ADDR_MAX; |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1853 | |
Stefan Hajnoczi | 49cd9ac | 2013-03-11 10:20:21 +0100 | [diff] [blame] | 1854 | assert(size != 0); /* it would hand out same offset multiple times */ |
| 1855 | |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1856 | if (QLIST_EMPTY_RCU(&ram_list.blocks)) { |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1857 | return 0; |
Mike Day | 0d53d9f | 2015-01-21 13:45:24 +0100 | [diff] [blame] | 1858 | } |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1859 | |
Peter Xu | 99e1558 | 2017-05-12 12:17:39 +0800 | [diff] [blame] | 1860 | RAMBLOCK_FOREACH(block) { |
Dr. David Alan Gilbert | 154cc9e | 2018-01-05 17:01:37 +0000 | [diff] [blame] | 1861 | ram_addr_t candidate, next = RAM_ADDR_MAX; |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1862 | |
Dr. David Alan Gilbert | 801110a | 2018-01-05 17:01:38 +0000 | [diff] [blame] | 1863 | /* Align blocks to start on a 'long' in the bitmap |
| 1864 | * which makes the bitmap sync'ing take the fast path. |
| 1865 | */ |
Dr. David Alan Gilbert | 154cc9e | 2018-01-05 17:01:37 +0000 | [diff] [blame] | 1866 | candidate = block->offset + block->max_length; |
Dr. David Alan Gilbert | 801110a | 2018-01-05 17:01:38 +0000 | [diff] [blame] | 1867 | candidate = ROUND_UP(candidate, BITS_PER_LONG << TARGET_PAGE_BITS); |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1868 | |
Dr. David Alan Gilbert | 154cc9e | 2018-01-05 17:01:37 +0000 | [diff] [blame] | 1869 | /* Search for the closest following block |
| 1870 | * and find the gap. |
| 1871 | */ |
Peter Xu | 99e1558 | 2017-05-12 12:17:39 +0800 | [diff] [blame] | 1872 | RAMBLOCK_FOREACH(next_block) { |
Dr. David Alan Gilbert | 154cc9e | 2018-01-05 17:01:37 +0000 | [diff] [blame] | 1873 | if (next_block->offset >= candidate) { |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1874 | next = MIN(next, next_block->offset); |
| 1875 | } |
| 1876 | } |
Dr. David Alan Gilbert | 154cc9e | 2018-01-05 17:01:37 +0000 | [diff] [blame] | 1877 | |
| 1878 | /* If it fits remember our place and remember the size |
| 1879 | * of gap, but keep going so that we might find a smaller |
| 1880 | * gap to fill so avoiding fragmentation. |
| 1881 | */ |
| 1882 | if (next - candidate >= size && next - candidate < mingap) { |
| 1883 | offset = candidate; |
| 1884 | mingap = next - candidate; |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1885 | } |
Dr. David Alan Gilbert | 154cc9e | 2018-01-05 17:01:37 +0000 | [diff] [blame] | 1886 | |
| 1887 | trace_find_ram_offset_loop(size, candidate, offset, next, mingap); |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1888 | } |
Alex Williamson | 3e837b2 | 2011-10-31 08:54:09 -0600 | [diff] [blame] | 1889 | |
| 1890 | if (offset == RAM_ADDR_MAX) { |
| 1891 | fprintf(stderr, "Failed to find gap of requested size: %" PRIu64 "\n", |
| 1892 | (uint64_t)size); |
| 1893 | abort(); |
| 1894 | } |
| 1895 | |
Dr. David Alan Gilbert | 154cc9e | 2018-01-05 17:01:37 +0000 | [diff] [blame] | 1896 | trace_find_ram_offset(size, offset); |
| 1897 | |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1898 | return offset; |
| 1899 | } |
| 1900 | |
Juan Quintela | b8c4899 | 2017-03-21 17:44:30 +0100 | [diff] [blame] | 1901 | unsigned long last_ram_page(void) |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1902 | { |
Alex Williamson | d17b528 | 2010-06-25 11:08:38 -0600 | [diff] [blame] | 1903 | RAMBlock *block; |
| 1904 | ram_addr_t last = 0; |
| 1905 | |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1906 | rcu_read_lock(); |
Peter Xu | 99e1558 | 2017-05-12 12:17:39 +0800 | [diff] [blame] | 1907 | RAMBLOCK_FOREACH(block) { |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 1908 | last = MAX(last, block->offset + block->max_length); |
Mike Day | 0d53d9f | 2015-01-21 13:45:24 +0100 | [diff] [blame] | 1909 | } |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1910 | rcu_read_unlock(); |
Juan Quintela | b8c4899 | 2017-03-21 17:44:30 +0100 | [diff] [blame] | 1911 | return last >> TARGET_PAGE_BITS; |
Alex Williamson | d17b528 | 2010-06-25 11:08:38 -0600 | [diff] [blame] | 1912 | } |
| 1913 | |
Jason Baron | ddb97f1 | 2012-08-02 15:44:16 -0400 | [diff] [blame] | 1914 | static void qemu_ram_setup_dump(void *addr, ram_addr_t size) |
| 1915 | { |
| 1916 | int ret; |
Jason Baron | ddb97f1 | 2012-08-02 15:44:16 -0400 | [diff] [blame] | 1917 | |
| 1918 | /* Use MADV_DONTDUMP, if user doesn't want the guest memory in the core */ |
Marcel Apfelbaum | 47c8ca5 | 2015-02-04 17:43:54 +0200 | [diff] [blame] | 1919 | if (!machine_dump_guest_core(current_machine)) { |
Jason Baron | ddb97f1 | 2012-08-02 15:44:16 -0400 | [diff] [blame] | 1920 | ret = qemu_madvise(addr, size, QEMU_MADV_DONTDUMP); |
| 1921 | if (ret) { |
| 1922 | perror("qemu_madvise"); |
| 1923 | fprintf(stderr, "madvise doesn't support MADV_DONTDUMP, " |
| 1924 | "but dump_guest_core=off specified\n"); |
| 1925 | } |
| 1926 | } |
| 1927 | } |
| 1928 | |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 1929 | const char *qemu_ram_get_idstr(RAMBlock *rb) |
| 1930 | { |
| 1931 | return rb->idstr; |
| 1932 | } |
| 1933 | |
Lingfeng Yang | 0709131 | 2018-08-13 12:48:29 -0700 | [diff] [blame] | 1934 | bool qemu_ram_is_migrate(RAMBlock* rb) |
| 1935 | { |
| 1936 | return rb->migrate; |
| 1937 | } |
| 1938 | |
Dr. David Alan Gilbert | 463a4ac | 2017-03-07 18:36:36 +0000 | [diff] [blame] | 1939 | bool qemu_ram_is_shared(RAMBlock *rb) |
| 1940 | { |
| 1941 | return rb->flags & RAM_SHARED; |
| 1942 | } |
| 1943 | |
Lingfeng Yang | 38aa929 | 2018-08-06 07:30:39 -0700 | [diff] [blame] | 1944 | bool qemu_ram_is_mapped(RAMBlock *rb) |
| 1945 | { |
| 1946 | return rb->flags & RAM_MAPPED; |
| 1947 | } |
| 1948 | |
Dr. David Alan Gilbert | 2ce1664 | 2018-03-12 17:20:58 +0000 | [diff] [blame] | 1949 | /* Note: Only set at the start of postcopy */ |
| 1950 | bool qemu_ram_is_uf_zeroable(RAMBlock *rb) |
| 1951 | { |
| 1952 | return rb->flags & RAM_UF_ZEROPAGE; |
| 1953 | } |
| 1954 | |
| 1955 | void qemu_ram_set_uf_zeroable(RAMBlock *rb) |
| 1956 | { |
| 1957 | rb->flags |= RAM_UF_ZEROPAGE; |
| 1958 | } |
| 1959 | |
Mike Day | ae3a704 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1960 | /* Called with iothread lock held. */ |
Gonglei | fa53a0e | 2016-05-10 10:04:59 +0800 | [diff] [blame] | 1961 | void qemu_ram_set_idstr(RAMBlock *new_block, const char *name, DeviceState *dev) |
Hu Tao | 20cfe88 | 2014-04-02 15:13:26 +0800 | [diff] [blame] | 1962 | { |
Gonglei | fa53a0e | 2016-05-10 10:04:59 +0800 | [diff] [blame] | 1963 | RAMBlock *block; |
Hu Tao | 20cfe88 | 2014-04-02 15:13:26 +0800 | [diff] [blame] | 1964 | |
Avi Kivity | c5705a7 | 2011-12-20 15:59:12 +0200 | [diff] [blame] | 1965 | assert(new_block); |
| 1966 | assert(!new_block->idstr[0]); |
Cam Macdonell | 84b89d7 | 2010-07-26 18:10:57 -0600 | [diff] [blame] | 1967 | |
Anthony Liguori | 09e5ab6 | 2012-02-03 12:28:43 -0600 | [diff] [blame] | 1968 | if (dev) { |
| 1969 | char *id = qdev_get_dev_path(dev); |
Cam Macdonell | 84b89d7 | 2010-07-26 18:10:57 -0600 | [diff] [blame] | 1970 | if (id) { |
| 1971 | snprintf(new_block->idstr, sizeof(new_block->idstr), "%s/", id); |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 1972 | g_free(id); |
Cam Macdonell | 84b89d7 | 2010-07-26 18:10:57 -0600 | [diff] [blame] | 1973 | } |
| 1974 | } |
| 1975 | pstrcat(new_block->idstr, sizeof(new_block->idstr), name); |
| 1976 | |
Gonglei | ab0a995 | 2016-05-10 10:05:00 +0800 | [diff] [blame] | 1977 | rcu_read_lock(); |
Peter Xu | 99e1558 | 2017-05-12 12:17:39 +0800 | [diff] [blame] | 1978 | RAMBLOCK_FOREACH(block) { |
Gonglei | fa53a0e | 2016-05-10 10:04:59 +0800 | [diff] [blame] | 1979 | if (block != new_block && |
| 1980 | !strcmp(block->idstr, new_block->idstr)) { |
Cam Macdonell | 84b89d7 | 2010-07-26 18:10:57 -0600 | [diff] [blame] | 1981 | fprintf(stderr, "RAMBlock \"%s\" already registered, abort!\n", |
| 1982 | new_block->idstr); |
| 1983 | abort(); |
| 1984 | } |
| 1985 | } |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1986 | rcu_read_unlock(); |
Avi Kivity | c5705a7 | 2011-12-20 15:59:12 +0200 | [diff] [blame] | 1987 | } |
| 1988 | |
Mike Day | ae3a704 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1989 | /* Called with iothread lock held. */ |
Gonglei | fa53a0e | 2016-05-10 10:04:59 +0800 | [diff] [blame] | 1990 | void qemu_ram_unset_idstr(RAMBlock *block) |
Hu Tao | 20cfe88 | 2014-04-02 15:13:26 +0800 | [diff] [blame] | 1991 | { |
Mike Day | ae3a704 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1992 | /* FIXME: arch_init.c assumes that this is not called throughout |
| 1993 | * migration. Ignore the problem since hot-unplug during migration |
| 1994 | * does not work anyway. |
| 1995 | */ |
Hu Tao | 20cfe88 | 2014-04-02 15:13:26 +0800 | [diff] [blame] | 1996 | if (block) { |
| 1997 | memset(block->idstr, 0, sizeof(block->idstr)); |
| 1998 | } |
| 1999 | } |
| 2000 | |
Lingfeng Yang | 0709131 | 2018-08-13 12:48:29 -0700 | [diff] [blame] | 2001 | void qemu_ram_set_migrate(RAMBlock* block, bool migrate) { |
| 2002 | block->migrate = migrate; |
| 2003 | } |
| 2004 | |
Dr. David Alan Gilbert | 863e962 | 2016-09-29 20:09:37 +0100 | [diff] [blame] | 2005 | size_t qemu_ram_pagesize(RAMBlock *rb) |
| 2006 | { |
| 2007 | return rb->page_size; |
| 2008 | } |
| 2009 | |
Dr. David Alan Gilbert | 67f11b5 | 2017-02-24 18:28:34 +0000 | [diff] [blame] | 2010 | /* Returns the largest size of page in use */ |
| 2011 | size_t qemu_ram_pagesize_largest(void) |
| 2012 | { |
| 2013 | RAMBlock *block; |
| 2014 | size_t largest = 0; |
| 2015 | |
Peter Xu | 99e1558 | 2017-05-12 12:17:39 +0800 | [diff] [blame] | 2016 | RAMBLOCK_FOREACH(block) { |
Dr. David Alan Gilbert | 67f11b5 | 2017-02-24 18:28:34 +0000 | [diff] [blame] | 2017 | largest = MAX(largest, qemu_ram_pagesize(block)); |
| 2018 | } |
| 2019 | |
| 2020 | return largest; |
| 2021 | } |
| 2022 | |
Luiz Capitulino | 8490fc7 | 2012-09-05 16:50:16 -0300 | [diff] [blame] | 2023 | static int memory_try_enable_merging(void *addr, size_t len) |
| 2024 | { |
Marcel Apfelbaum | 75cc7f0 | 2015-02-04 17:43:55 +0200 | [diff] [blame] | 2025 | if (!machine_mem_merge(current_machine)) { |
Luiz Capitulino | 8490fc7 | 2012-09-05 16:50:16 -0300 | [diff] [blame] | 2026 | /* disabled by the user */ |
| 2027 | return 0; |
| 2028 | } |
| 2029 | |
| 2030 | return qemu_madvise(addr, len, QEMU_MADV_MERGEABLE); |
| 2031 | } |
| 2032 | |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 2033 | /* Only legal before guest might have detected the memory size: e.g. on |
| 2034 | * incoming migration, or right after reset. |
| 2035 | * |
| 2036 | * As memory core doesn't know how is memory accessed, it is up to |
| 2037 | * resize callback to update device state and/or add assertions to detect |
| 2038 | * misuse, if necessary. |
| 2039 | */ |
Gonglei | fa53a0e | 2016-05-10 10:04:59 +0800 | [diff] [blame] | 2040 | int qemu_ram_resize(RAMBlock *block, ram_addr_t newsize, Error **errp) |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 2041 | { |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 2042 | assert(block); |
| 2043 | |
Dr. David Alan Gilbert | 4ed023c | 2015-11-05 18:11:16 +0000 | [diff] [blame] | 2044 | newsize = HOST_PAGE_ALIGN(newsize); |
Michael S. Tsirkin | 129ddaf | 2015-02-17 10:15:30 +0100 | [diff] [blame] | 2045 | |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 2046 | if (block->used_length == newsize) { |
| 2047 | return 0; |
| 2048 | } |
| 2049 | |
| 2050 | if (!(block->flags & RAM_RESIZEABLE)) { |
| 2051 | error_setg_errno(errp, EINVAL, |
| 2052 | "Length mismatch: %s: 0x" RAM_ADDR_FMT |
| 2053 | " in != 0x" RAM_ADDR_FMT, block->idstr, |
| 2054 | newsize, block->used_length); |
| 2055 | return -EINVAL; |
| 2056 | } |
| 2057 | |
| 2058 | if (block->max_length < newsize) { |
| 2059 | error_setg_errno(errp, EINVAL, |
| 2060 | "Length too large: %s: 0x" RAM_ADDR_FMT |
| 2061 | " > 0x" RAM_ADDR_FMT, block->idstr, |
| 2062 | newsize, block->max_length); |
| 2063 | return -EINVAL; |
| 2064 | } |
| 2065 | |
| 2066 | cpu_physical_memory_clear_dirty_range(block->offset, block->used_length); |
| 2067 | block->used_length = newsize; |
Paolo Bonzini | 58d2707 | 2015-03-23 11:56:01 +0100 | [diff] [blame] | 2068 | cpu_physical_memory_set_dirty_range(block->offset, block->used_length, |
| 2069 | DIRTY_CLIENTS_ALL); |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 2070 | memory_region_set_size(block->mr, newsize); |
| 2071 | if (block->resized) { |
| 2072 | block->resized(block->idstr, newsize, block->host); |
| 2073 | } |
| 2074 | return 0; |
| 2075 | } |
| 2076 | |
Stefan Hajnoczi | 5b82b70 | 2016-01-25 13:33:20 +0000 | [diff] [blame] | 2077 | /* Called with ram_list.mutex held */ |
| 2078 | static void dirty_memory_extend(ram_addr_t old_ram_size, |
| 2079 | ram_addr_t new_ram_size) |
| 2080 | { |
| 2081 | ram_addr_t old_num_blocks = DIV_ROUND_UP(old_ram_size, |
| 2082 | DIRTY_MEMORY_BLOCK_SIZE); |
| 2083 | ram_addr_t new_num_blocks = DIV_ROUND_UP(new_ram_size, |
| 2084 | DIRTY_MEMORY_BLOCK_SIZE); |
| 2085 | int i; |
| 2086 | |
| 2087 | /* Only need to extend if block count increased */ |
| 2088 | if (new_num_blocks <= old_num_blocks) { |
| 2089 | return; |
| 2090 | } |
| 2091 | |
| 2092 | for (i = 0; i < DIRTY_MEMORY_NUM; i++) { |
| 2093 | DirtyMemoryBlocks *old_blocks; |
| 2094 | DirtyMemoryBlocks *new_blocks; |
| 2095 | int j; |
| 2096 | |
| 2097 | old_blocks = atomic_rcu_read(&ram_list.dirty_memory[i]); |
| 2098 | new_blocks = g_malloc(sizeof(*new_blocks) + |
| 2099 | sizeof(new_blocks->blocks[0]) * new_num_blocks); |
| 2100 | |
| 2101 | if (old_num_blocks) { |
| 2102 | memcpy(new_blocks->blocks, old_blocks->blocks, |
| 2103 | old_num_blocks * sizeof(old_blocks->blocks[0])); |
| 2104 | } |
| 2105 | |
| 2106 | for (j = old_num_blocks; j < new_num_blocks; j++) { |
| 2107 | new_blocks->blocks[j] = bitmap_new(DIRTY_MEMORY_BLOCK_SIZE); |
| 2108 | } |
| 2109 | |
| 2110 | atomic_rcu_set(&ram_list.dirty_memory[i], new_blocks); |
| 2111 | |
| 2112 | if (old_blocks) { |
| 2113 | g_free_rcu(old_blocks, rcu); |
| 2114 | } |
| 2115 | } |
| 2116 | } |
| 2117 | |
Marcel Apfelbaum | 06329cce | 2017-12-13 16:37:37 +0200 | [diff] [blame] | 2118 | static void ram_block_add(RAMBlock *new_block, Error **errp, bool shared) |
Avi Kivity | c5705a7 | 2011-12-20 15:59:12 +0200 | [diff] [blame] | 2119 | { |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 2120 | RAMBlock *block; |
Mike Day | 0d53d9f | 2015-01-21 13:45:24 +0100 | [diff] [blame] | 2121 | RAMBlock *last_block = NULL; |
Juan Quintela | 2152f5c | 2013-10-08 13:52:02 +0200 | [diff] [blame] | 2122 | ram_addr_t old_ram_size, new_ram_size; |
Markus Armbruster | 37aa7a0 | 2016-01-14 16:09:39 +0100 | [diff] [blame] | 2123 | Error *err = NULL; |
Juan Quintela | 2152f5c | 2013-10-08 13:52:02 +0200 | [diff] [blame] | 2124 | |
Juan Quintela | b8c4899 | 2017-03-21 17:44:30 +0100 | [diff] [blame] | 2125 | old_ram_size = last_ram_page(); |
Avi Kivity | c5705a7 | 2011-12-20 15:59:12 +0200 | [diff] [blame] | 2126 | |
Umesh Deshpande | b2a8658 | 2011-08-17 00:01:33 -0700 | [diff] [blame] | 2127 | qemu_mutex_lock_ramlist(); |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 2128 | new_block->offset = find_ram_offset(new_block->max_length); |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 2129 | |
Lingfeng Yang | 2686e6d | 2018-11-07 07:50:15 -0800 | [diff] [blame] | 2130 | if (!new_block->host && !(new_block->flags & RAM_USER_BACKED)) { |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 2131 | if (xen_enabled()) { |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 2132 | xen_ram_alloc(new_block->offset, new_block->max_length, |
Markus Armbruster | 37aa7a0 | 2016-01-14 16:09:39 +0100 | [diff] [blame] | 2133 | new_block->mr, &err); |
| 2134 | if (err) { |
| 2135 | error_propagate(errp, err); |
| 2136 | qemu_mutex_unlock_ramlist(); |
Paolo Bonzini | 39c350e | 2016-03-09 18:14:01 +0100 | [diff] [blame] | 2137 | return; |
Markus Armbruster | 37aa7a0 | 2016-01-14 16:09:39 +0100 | [diff] [blame] | 2138 | } |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 2139 | } else { |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 2140 | new_block->host = phys_mem_alloc(new_block->max_length, |
Marcel Apfelbaum | 06329cce | 2017-12-13 16:37:37 +0200 | [diff] [blame] | 2141 | &new_block->mr->align, shared); |
Markus Armbruster | 3922825 | 2013-07-31 15:11:11 +0200 | [diff] [blame] | 2142 | if (!new_block->host) { |
Lingfeng Yang | 3196319 | 2018-08-06 11:03:22 -0700 | [diff] [blame] | 2143 | if (insufficientMemMessage) { |
| 2144 | // We've messaged the user on insufficient memory, |
| 2145 | // just exit instead of aborting. |
Lingfeng Yang | 4bd5e8a | 2018-07-31 16:09:49 -0700 | [diff] [blame] | 2146 | qemu_mutex_unlock_ramlist(); |
| 2147 | _exit(1); |
| 2148 | } |
Hu Tao | ef701d7 | 2014-09-09 13:27:54 +0800 | [diff] [blame] | 2149 | error_setg_errno(errp, errno, |
| 2150 | "cannot set up guest memory '%s'", |
| 2151 | memory_region_name(new_block->mr)); |
| 2152 | qemu_mutex_unlock_ramlist(); |
Paolo Bonzini | 39c350e | 2016-03-09 18:14:01 +0100 | [diff] [blame] | 2153 | return; |
Markus Armbruster | 3922825 | 2013-07-31 15:11:11 +0200 | [diff] [blame] | 2154 | } |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 2155 | memory_try_enable_merging(new_block->host, new_block->max_length); |
Yoshiaki Tamura | 6977dfe | 2010-08-18 15:41:49 +0900 | [diff] [blame] | 2156 | } |
| 2157 | } |
Cam Macdonell | 84b89d7 | 2010-07-26 18:10:57 -0600 | [diff] [blame] | 2158 | |
Li Zhijian | dd63169 | 2015-07-02 20:18:06 +0800 | [diff] [blame] | 2159 | new_ram_size = MAX(old_ram_size, |
| 2160 | (new_block->offset + new_block->max_length) >> TARGET_PAGE_BITS); |
| 2161 | if (new_ram_size > old_ram_size) { |
Stefan Hajnoczi | 5b82b70 | 2016-01-25 13:33:20 +0000 | [diff] [blame] | 2162 | dirty_memory_extend(old_ram_size, new_ram_size); |
Li Zhijian | dd63169 | 2015-07-02 20:18:06 +0800 | [diff] [blame] | 2163 | } |
Mike Day | 0d53d9f | 2015-01-21 13:45:24 +0100 | [diff] [blame] | 2164 | /* Keep the list sorted from biggest to smallest block. Unlike QTAILQ, |
| 2165 | * QLIST (which has an RCU-friendly variant) does not have insertion at |
| 2166 | * tail, so save the last element in last_block. |
| 2167 | */ |
Peter Xu | 99e1558 | 2017-05-12 12:17:39 +0800 | [diff] [blame] | 2168 | RAMBLOCK_FOREACH(block) { |
Mike Day | 0d53d9f | 2015-01-21 13:45:24 +0100 | [diff] [blame] | 2169 | last_block = block; |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 2170 | if (block->max_length < new_block->max_length) { |
Paolo Bonzini | abb26d6 | 2012-11-14 16:00:51 +0100 | [diff] [blame] | 2171 | break; |
| 2172 | } |
| 2173 | } |
| 2174 | if (block) { |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2175 | QLIST_INSERT_BEFORE_RCU(block, new_block, next); |
Mike Day | 0d53d9f | 2015-01-21 13:45:24 +0100 | [diff] [blame] | 2176 | } else if (last_block) { |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2177 | QLIST_INSERT_AFTER_RCU(last_block, new_block, next); |
Mike Day | 0d53d9f | 2015-01-21 13:45:24 +0100 | [diff] [blame] | 2178 | } else { /* list is empty */ |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2179 | QLIST_INSERT_HEAD_RCU(&ram_list.blocks, new_block, next); |
Paolo Bonzini | abb26d6 | 2012-11-14 16:00:51 +0100 | [diff] [blame] | 2180 | } |
Paolo Bonzini | 0d6d3c8 | 2012-11-14 15:45:02 +0100 | [diff] [blame] | 2181 | ram_list.mru_block = NULL; |
Cam Macdonell | 84b89d7 | 2010-07-26 18:10:57 -0600 | [diff] [blame] | 2182 | |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2183 | /* Write list before version */ |
| 2184 | smp_wmb(); |
Umesh Deshpande | f798b07 | 2011-08-18 11:41:17 -0700 | [diff] [blame] | 2185 | ram_list.version++; |
Umesh Deshpande | b2a8658 | 2011-08-17 00:01:33 -0700 | [diff] [blame] | 2186 | qemu_mutex_unlock_ramlist(); |
Umesh Deshpande | f798b07 | 2011-08-18 11:41:17 -0700 | [diff] [blame] | 2187 | |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 2188 | cpu_physical_memory_set_dirty_range(new_block->offset, |
Paolo Bonzini | 58d2707 | 2015-03-23 11:56:01 +0100 | [diff] [blame] | 2189 | new_block->used_length, |
| 2190 | DIRTY_CLIENTS_ALL); |
Cam Macdonell | 84b89d7 | 2010-07-26 18:10:57 -0600 | [diff] [blame] | 2191 | |
Paolo Bonzini | a904c91 | 2015-01-21 16:18:35 +0100 | [diff] [blame] | 2192 | if (new_block->host) { |
| 2193 | qemu_ram_setup_dump(new_block->host, new_block->max_length); |
| 2194 | qemu_madvise(new_block->host, new_block->max_length, QEMU_MADV_HUGEPAGE); |
Cao jin | c2cd627 | 2016-09-12 14:34:56 +0800 | [diff] [blame] | 2195 | /* MADV_DONTFORK is also needed by KVM in absence of synchronous MMU */ |
Paolo Bonzini | a904c91 | 2015-01-21 16:18:35 +0100 | [diff] [blame] | 2196 | qemu_madvise(new_block->host, new_block->max_length, QEMU_MADV_DONTFORK); |
Paolo Bonzini | 0987d73 | 2016-12-21 00:31:36 +0800 | [diff] [blame] | 2197 | ram_block_notify_add(new_block->host, new_block->max_length); |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 2198 | } |
Cam Macdonell | 84b89d7 | 2010-07-26 18:10:57 -0600 | [diff] [blame] | 2199 | } |
| 2200 | |
Marc-André Lureau | 38b3362 | 2017-06-02 18:12:23 +0400 | [diff] [blame] | 2201 | RAMBlock *qemu_ram_alloc_from_fd(ram_addr_t size, MemoryRegion *mr, |
| 2202 | bool share, int fd, |
| 2203 | Error **errp) |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 2204 | { |
| 2205 | RAMBlock *new_block; |
Hu Tao | ef701d7 | 2014-09-09 13:27:54 +0800 | [diff] [blame] | 2206 | Error *local_err = NULL; |
Marc-André Lureau | 8d37b03 | 2017-06-02 18:12:22 +0400 | [diff] [blame] | 2207 | int64_t file_size; |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 2208 | |
| 2209 | if (xen_enabled()) { |
Paolo Bonzini | 7f56e74 | 2014-05-14 17:43:20 +0800 | [diff] [blame] | 2210 | error_setg(errp, "-mem-path not supported with Xen"); |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 2211 | return NULL; |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 2212 | } |
| 2213 | |
Marc-André Lureau | e45e7ae | 2017-06-02 18:12:21 +0400 | [diff] [blame] | 2214 | if (kvm_enabled() && !kvm_has_sync_mmu()) { |
| 2215 | error_setg(errp, |
| 2216 | "host lacks kvm mmu notifiers, -mem-path unsupported"); |
| 2217 | return NULL; |
| 2218 | } |
| 2219 | |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 2220 | if (phys_mem_alloc != qemu_anon_ram_alloc) { |
| 2221 | /* |
| 2222 | * file_ram_alloc() needs to allocate just like |
| 2223 | * phys_mem_alloc, but we haven't bothered to provide |
| 2224 | * a hook there. |
| 2225 | */ |
Paolo Bonzini | 7f56e74 | 2014-05-14 17:43:20 +0800 | [diff] [blame] | 2226 | error_setg(errp, |
| 2227 | "-mem-path not supported with this accelerator"); |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 2228 | return NULL; |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 2229 | } |
| 2230 | |
Dr. David Alan Gilbert | 4ed023c | 2015-11-05 18:11:16 +0000 | [diff] [blame] | 2231 | size = HOST_PAGE_ALIGN(size); |
Marc-André Lureau | 8d37b03 | 2017-06-02 18:12:22 +0400 | [diff] [blame] | 2232 | file_size = get_file_size(fd); |
| 2233 | if (file_size > 0 && file_size < size) { |
| 2234 | error_setg(errp, "backing store %s size 0x%" PRIx64 |
| 2235 | " does not match 'size' option 0x" RAM_ADDR_FMT, |
| 2236 | mem_path, file_size, size); |
Marc-André Lureau | 8d37b03 | 2017-06-02 18:12:22 +0400 | [diff] [blame] | 2237 | return NULL; |
| 2238 | } |
| 2239 | |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 2240 | new_block = g_malloc0(sizeof(*new_block)); |
| 2241 | new_block->mr = mr; |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 2242 | new_block->used_length = size; |
| 2243 | new_block->max_length = size; |
Lingfeng Yang | 38aa929 | 2018-08-06 07:30:39 -0700 | [diff] [blame] | 2244 | new_block->flags = RAM_MAPPED | (share ? RAM_SHARED : 0); |
Marc-André Lureau | 8d37b03 | 2017-06-02 18:12:22 +0400 | [diff] [blame] | 2245 | new_block->host = file_ram_alloc(new_block, size, fd, !file_size, errp); |
Paolo Bonzini | 7f56e74 | 2014-05-14 17:43:20 +0800 | [diff] [blame] | 2246 | if (!new_block->host) { |
| 2247 | g_free(new_block); |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 2248 | return NULL; |
Paolo Bonzini | 7f56e74 | 2014-05-14 17:43:20 +0800 | [diff] [blame] | 2249 | } |
| 2250 | |
Marcel Apfelbaum | 06329cce | 2017-12-13 16:37:37 +0200 | [diff] [blame] | 2251 | ram_block_add(new_block, &local_err, share); |
Hu Tao | ef701d7 | 2014-09-09 13:27:54 +0800 | [diff] [blame] | 2252 | if (local_err) { |
| 2253 | g_free(new_block); |
| 2254 | error_propagate(errp, local_err); |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 2255 | return NULL; |
Hu Tao | ef701d7 | 2014-09-09 13:27:54 +0800 | [diff] [blame] | 2256 | } |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 2257 | return new_block; |
Marc-André Lureau | 38b3362 | 2017-06-02 18:12:23 +0400 | [diff] [blame] | 2258 | |
| 2259 | } |
| 2260 | |
| 2261 | |
| 2262 | RAMBlock *qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr, |
| 2263 | bool share, const char *mem_path, |
| 2264 | Error **errp) |
| 2265 | { |
| 2266 | int fd; |
| 2267 | bool created; |
| 2268 | RAMBlock *block; |
| 2269 | |
| 2270 | fd = file_ram_open(mem_path, memory_region_name(mr), &created, errp); |
| 2271 | if (fd < 0) { |
| 2272 | return NULL; |
| 2273 | } |
| 2274 | |
| 2275 | block = qemu_ram_alloc_from_fd(size, mr, share, fd, errp); |
| 2276 | if (!block) { |
| 2277 | if (created) { |
| 2278 | unlink(mem_path); |
| 2279 | } |
Lingfeng Yang | 7140251 | 2018-08-16 13:58:49 -0700 | [diff] [blame] | 2280 | #ifdef _WIN32 |
| 2281 | _close(fd); |
| 2282 | #else |
Marc-André Lureau | 38b3362 | 2017-06-02 18:12:23 +0400 | [diff] [blame] | 2283 | close(fd); |
Lingfeng Yang | 7140251 | 2018-08-16 13:58:49 -0700 | [diff] [blame] | 2284 | #endif |
Marc-André Lureau | 38b3362 | 2017-06-02 18:12:23 +0400 | [diff] [blame] | 2285 | return NULL; |
| 2286 | } |
| 2287 | |
Lingfeng Yang | cda0ba9 | 2018-08-15 14:58:15 -0700 | [diff] [blame] | 2288 | block->path = g_strdup(mem_path); |
Marc-André Lureau | 38b3362 | 2017-06-02 18:12:23 +0400 | [diff] [blame] | 2289 | return block; |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 2290 | } |
| 2291 | |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 2292 | static |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 2293 | RAMBlock *qemu_ram_alloc_internal(ram_addr_t size, ram_addr_t max_size, |
| 2294 | void (*resized)(const char*, |
| 2295 | uint64_t length, |
| 2296 | void *host), |
Marcel Apfelbaum | 06329cce | 2017-12-13 16:37:37 +0200 | [diff] [blame] | 2297 | void *host, bool resizeable, bool share, |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 2298 | MemoryRegion *mr, Error **errp) |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 2299 | { |
| 2300 | RAMBlock *new_block; |
Hu Tao | ef701d7 | 2014-09-09 13:27:54 +0800 | [diff] [blame] | 2301 | Error *local_err = NULL; |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 2302 | |
Dr. David Alan Gilbert | 4ed023c | 2015-11-05 18:11:16 +0000 | [diff] [blame] | 2303 | size = HOST_PAGE_ALIGN(size); |
| 2304 | max_size = HOST_PAGE_ALIGN(max_size); |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 2305 | new_block = g_malloc0(sizeof(*new_block)); |
| 2306 | new_block->mr = mr; |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 2307 | new_block->resized = resized; |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 2308 | new_block->used_length = size; |
| 2309 | new_block->max_length = max_size; |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 2310 | assert(max_size >= size); |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 2311 | new_block->fd = -1; |
Dr. David Alan Gilbert | 863e962 | 2016-09-29 20:09:37 +0100 | [diff] [blame] | 2312 | new_block->page_size = getpagesize(); |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 2313 | new_block->host = host; |
| 2314 | if (host) { |
Paolo Bonzini | 7bd4f43 | 2014-05-14 17:43:22 +0800 | [diff] [blame] | 2315 | new_block->flags |= RAM_PREALLOC; |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 2316 | } |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 2317 | if (resizeable) { |
| 2318 | new_block->flags |= RAM_RESIZEABLE; |
| 2319 | } |
Marcel Apfelbaum | 06329cce | 2017-12-13 16:37:37 +0200 | [diff] [blame] | 2320 | ram_block_add(new_block, &local_err, share); |
Hu Tao | ef701d7 | 2014-09-09 13:27:54 +0800 | [diff] [blame] | 2321 | if (local_err) { |
| 2322 | g_free(new_block); |
| 2323 | error_propagate(errp, local_err); |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 2324 | return NULL; |
Hu Tao | ef701d7 | 2014-09-09 13:27:54 +0800 | [diff] [blame] | 2325 | } |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 2326 | return new_block; |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 2327 | } |
| 2328 | |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 2329 | RAMBlock *qemu_ram_alloc_from_ptr(ram_addr_t size, void *host, |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 2330 | MemoryRegion *mr, Error **errp) |
| 2331 | { |
Marcel Apfelbaum | 06329cce | 2017-12-13 16:37:37 +0200 | [diff] [blame] | 2332 | return qemu_ram_alloc_internal(size, size, NULL, host, false, |
| 2333 | false, mr, errp); |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 2334 | } |
| 2335 | |
Marcel Apfelbaum | 06329cce | 2017-12-13 16:37:37 +0200 | [diff] [blame] | 2336 | RAMBlock *qemu_ram_alloc(ram_addr_t size, bool share, |
| 2337 | MemoryRegion *mr, Error **errp) |
pbrook | 94a6b54 | 2009-04-11 17:15:54 +0000 | [diff] [blame] | 2338 | { |
Marcel Apfelbaum | 06329cce | 2017-12-13 16:37:37 +0200 | [diff] [blame] | 2339 | return qemu_ram_alloc_internal(size, size, NULL, NULL, false, |
| 2340 | share, mr, errp); |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 2341 | } |
| 2342 | |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 2343 | RAMBlock *qemu_ram_alloc_resizeable(ram_addr_t size, ram_addr_t maxsz, |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 2344 | void (*resized)(const char*, |
| 2345 | uint64_t length, |
| 2346 | void *host), |
| 2347 | MemoryRegion *mr, Error **errp) |
| 2348 | { |
Marcel Apfelbaum | 06329cce | 2017-12-13 16:37:37 +0200 | [diff] [blame] | 2349 | return qemu_ram_alloc_internal(size, maxsz, resized, NULL, true, |
| 2350 | false, mr, errp); |
pbrook | 94a6b54 | 2009-04-11 17:15:54 +0000 | [diff] [blame] | 2351 | } |
bellard | e9a1ab1 | 2007-02-08 23:08:38 +0000 | [diff] [blame] | 2352 | |
Lingfeng Yang | 2686e6d | 2018-11-07 07:50:15 -0800 | [diff] [blame] | 2353 | RAMBlock *qemu_ram_alloc_user_backed(ram_addr_t size, MemoryRegion *mr, |
| 2354 | Error **errp) |
| 2355 | { |
Lingfeng Yang | 2686e6d | 2018-11-07 07:50:15 -0800 | [diff] [blame] | 2356 | RAMBlock *new_block; |
| 2357 | Error *local_err = NULL; |
| 2358 | |
| 2359 | size = HOST_PAGE_ALIGN(size); |
| 2360 | new_block = (RAMBlock*)g_malloc0(sizeof(*new_block)); |
| 2361 | new_block->mr = mr; |
| 2362 | new_block->used_length = size; |
| 2363 | new_block->max_length = size; |
| 2364 | new_block->fd = -1; |
| 2365 | new_block->page_size = getpagesize(); |
| 2366 | new_block->host = NULL; |
| 2367 | new_block->flags |= RAM_PREALLOC; |
| 2368 | new_block->flags |= RAM_USER_BACKED; |
| 2369 | ram_block_add(new_block, &local_err, false /* not shared */); |
| 2370 | if (local_err) { |
| 2371 | g_free(new_block); |
| 2372 | error_propagate(errp, local_err); |
| 2373 | return NULL; |
| 2374 | } |
| 2375 | return new_block; |
| 2376 | } |
| 2377 | |
Roman Kiryanov | ebbe225 | 2018-11-16 15:42:25 -0800 | [diff] [blame] | 2378 | void qemu_user_backed_ram_map_empty(uint64_t gpa, void *hva, uint64_t size, int flags) |
| 2379 | { |
| 2380 | qemu_abort("FATAL: Did not set ram map function before mapping"); |
| 2381 | } |
| 2382 | |
| 2383 | void qemu_user_backed_ram_unmap_empty(uint64_t gpa, uint64_t size) |
| 2384 | { |
| 2385 | qemu_abort("FATAL: Did not set ram unmap function before unmapping"); |
| 2386 | } |
| 2387 | |
| 2388 | static QemuUserBackedRamMapFunc s_user_backed_ram_map = &qemu_user_backed_ram_map_empty; |
| 2389 | static QemuUserBackedRamUnmapFunc s_user_backed_ram_unmap = &qemu_user_backed_ram_unmap_empty; |
Lingfeng Yang | 9aceb44 | 2018-11-07 09:05:17 -0800 | [diff] [blame] | 2390 | |
| 2391 | void qemu_set_user_backed_mapping_funcs(QemuUserBackedRamMapFunc mapFunc, |
| 2392 | QemuUserBackedRamUnmapFunc unmapFunc) |
| 2393 | { |
| 2394 | s_user_backed_ram_map = mapFunc; |
| 2395 | s_user_backed_ram_unmap = unmapFunc; |
| 2396 | } |
| 2397 | |
Roman Kiryanov | ebbe225 | 2018-11-16 15:42:25 -0800 | [diff] [blame] | 2398 | void qemu_user_backed_ram_map(uint64_t gpa, void *hva, uint64_t size, int flags) |
Lingfeng Yang | 9aceb44 | 2018-11-07 09:05:17 -0800 | [diff] [blame] | 2399 | { |
Lingfeng Yang | 9aceb44 | 2018-11-07 09:05:17 -0800 | [diff] [blame] | 2400 | s_user_backed_ram_map(gpa, hva, size, flags); |
| 2401 | } |
| 2402 | |
Roman Kiryanov | ebbe225 | 2018-11-16 15:42:25 -0800 | [diff] [blame] | 2403 | void qemu_user_backed_ram_unmap(uint64_t gpa, uint64_t size) |
Lingfeng Yang | 9aceb44 | 2018-11-07 09:05:17 -0800 | [diff] [blame] | 2404 | { |
Lingfeng Yang | 9aceb44 | 2018-11-07 09:05:17 -0800 | [diff] [blame] | 2405 | s_user_backed_ram_unmap(gpa, size); |
| 2406 | } |
| 2407 | |
Lingfeng Yang | aff5efd | 2019-02-04 11:30:42 -0800 | [diff] [blame] | 2408 | static struct qemu_address_space_device_control_ops* |
| 2409 | qemu_address_space_device_control_ops = 0; |
| 2410 | |
| 2411 | void qemu_set_address_space_device_control_ops( |
| 2412 | struct qemu_address_space_device_control_ops* ops) { |
| 2413 | qemu_address_space_device_control_ops = ops; |
| 2414 | } |
| 2415 | |
| 2416 | struct qemu_address_space_device_control_ops* |
| 2417 | qemu_get_address_space_device_control_ops() { |
| 2418 | return qemu_address_space_device_control_ops; |
| 2419 | } |
| 2420 | |
Paolo Bonzini | 4377153 | 2013-09-09 17:58:40 +0200 | [diff] [blame] | 2421 | static void reclaim_ramblock(RAMBlock *block) |
| 2422 | { |
| 2423 | if (block->flags & RAM_PREALLOC) { |
| 2424 | ; |
| 2425 | } else if (xen_enabled()) { |
| 2426 | xen_invalidate_map_cache_entry(block->host); |
Paolo Bonzini | 4377153 | 2013-09-09 17:58:40 +0200 | [diff] [blame] | 2427 | } else if (block->fd >= 0) { |
Eduardo Habkost | 2f3a2bb | 2015-11-06 20:11:21 -0200 | [diff] [blame] | 2428 | qemu_ram_munmap(block->host, block->max_length); |
Lingfeng Yang | 7140251 | 2018-08-16 13:58:49 -0700 | [diff] [blame] | 2429 | #ifdef _WIN32 |
| 2430 | _close(block->fd); |
| 2431 | #else |
Paolo Bonzini | 4377153 | 2013-09-09 17:58:40 +0200 | [diff] [blame] | 2432 | close(block->fd); |
| 2433 | #endif |
| 2434 | } else { |
| 2435 | qemu_anon_ram_free(block->host, block->max_length); |
| 2436 | } |
| 2437 | g_free(block); |
| 2438 | } |
| 2439 | |
Fam Zheng | f1060c5 | 2016-03-01 14:18:22 +0800 | [diff] [blame] | 2440 | void qemu_ram_free(RAMBlock *block) |
bellard | e9a1ab1 | 2007-02-08 23:08:38 +0000 | [diff] [blame] | 2441 | { |
Marc-André Lureau | 85bc2a1 | 2016-03-29 13:20:51 +0200 | [diff] [blame] | 2442 | if (!block) { |
| 2443 | return; |
| 2444 | } |
| 2445 | |
Lingfeng Yang | 6241395 | 2018-12-14 09:07:53 -0800 | [diff] [blame] | 2446 | if (block->host && !ram_blocks_exiting) { |
Paolo Bonzini | 0987d73 | 2016-12-21 00:31:36 +0800 | [diff] [blame] | 2447 | ram_block_notify_remove(block->host, block->max_length); |
| 2448 | } |
| 2449 | |
Umesh Deshpande | b2a8658 | 2011-08-17 00:01:33 -0700 | [diff] [blame] | 2450 | qemu_mutex_lock_ramlist(); |
Fam Zheng | f1060c5 | 2016-03-01 14:18:22 +0800 | [diff] [blame] | 2451 | QLIST_REMOVE_RCU(block, next); |
| 2452 | ram_list.mru_block = NULL; |
| 2453 | /* Write list before version */ |
| 2454 | smp_wmb(); |
| 2455 | ram_list.version++; |
Lingfeng Yang | 6241395 | 2018-12-14 09:07:53 -0800 | [diff] [blame] | 2456 | if (ram_blocks_exiting) { |
| 2457 | reclaim_ramblock(block); |
| 2458 | } else { |
| 2459 | call_rcu(block, reclaim_ramblock, rcu); |
| 2460 | } |
Umesh Deshpande | b2a8658 | 2011-08-17 00:01:33 -0700 | [diff] [blame] | 2461 | qemu_mutex_unlock_ramlist(); |
bellard | e9a1ab1 | 2007-02-08 23:08:38 +0000 | [diff] [blame] | 2462 | } |
| 2463 | |
Lingfeng Yang | 6241395 | 2018-12-14 09:07:53 -0800 | [diff] [blame] | 2464 | void qemu_set_ram_blocks_exiting() |
| 2465 | { |
| 2466 | ram_blocks_exiting = true; |
| 2467 | } |
| 2468 | |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2469 | #ifndef _WIN32 |
| 2470 | void qemu_ram_remap(ram_addr_t addr, ram_addr_t length) |
| 2471 | { |
| 2472 | RAMBlock *block; |
| 2473 | ram_addr_t offset; |
| 2474 | int flags; |
| 2475 | void *area, *vaddr; |
| 2476 | |
Peter Xu | 99e1558 | 2017-05-12 12:17:39 +0800 | [diff] [blame] | 2477 | RAMBLOCK_FOREACH(block) { |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2478 | offset = addr - block->offset; |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 2479 | if (offset < block->max_length) { |
Michael S. Tsirkin | 1240be2 | 2014-11-12 11:44:41 +0200 | [diff] [blame] | 2480 | vaddr = ramblock_ptr(block, offset); |
Paolo Bonzini | 7bd4f43 | 2014-05-14 17:43:22 +0800 | [diff] [blame] | 2481 | if (block->flags & RAM_PREALLOC) { |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2482 | ; |
Markus Armbruster | dfeaf2a | 2013-07-31 15:11:05 +0200 | [diff] [blame] | 2483 | } else if (xen_enabled()) { |
| 2484 | abort(); |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2485 | } else { |
| 2486 | flags = MAP_FIXED; |
Markus Armbruster | 3435f39 | 2013-07-31 15:11:07 +0200 | [diff] [blame] | 2487 | if (block->fd >= 0) { |
Paolo Bonzini | dbcb898 | 2014-06-10 19:15:24 +0800 | [diff] [blame] | 2488 | flags |= (block->flags & RAM_SHARED ? |
| 2489 | MAP_SHARED : MAP_PRIVATE); |
Markus Armbruster | 3435f39 | 2013-07-31 15:11:07 +0200 | [diff] [blame] | 2490 | area = mmap(vaddr, length, PROT_READ | PROT_WRITE, |
| 2491 | flags, block->fd, offset); |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2492 | } else { |
Markus Armbruster | 2eb9fba | 2013-07-31 15:11:09 +0200 | [diff] [blame] | 2493 | /* |
| 2494 | * Remap needs to match alloc. Accelerators that |
| 2495 | * set phys_mem_alloc never remap. If they did, |
| 2496 | * we'd need a remap hook here. |
| 2497 | */ |
| 2498 | assert(phys_mem_alloc == qemu_anon_ram_alloc); |
| 2499 | |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2500 | flags |= MAP_PRIVATE | MAP_ANONYMOUS; |
| 2501 | area = mmap(vaddr, length, PROT_READ | PROT_WRITE, |
| 2502 | flags, -1, 0); |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2503 | } |
| 2504 | if (area != vaddr) { |
Alistair Francis | 493d89b | 2018-02-03 09:43:14 +0100 | [diff] [blame] | 2505 | error_report("Could not remap addr: " |
| 2506 | RAM_ADDR_FMT "@" RAM_ADDR_FMT "", |
| 2507 | length, addr); |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2508 | exit(1); |
| 2509 | } |
Luiz Capitulino | 8490fc7 | 2012-09-05 16:50:16 -0300 | [diff] [blame] | 2510 | memory_try_enable_merging(vaddr, length); |
Jason Baron | ddb97f1 | 2012-08-02 15:44:16 -0400 | [diff] [blame] | 2511 | qemu_ram_setup_dump(vaddr, length); |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2512 | } |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2513 | } |
| 2514 | } |
| 2515 | } |
| 2516 | #endif /* !_WIN32 */ |
| 2517 | |
Lingfeng Yang | cda0ba9 | 2018-08-15 14:58:15 -0700 | [diff] [blame] | 2518 | static void ram_block_teardown_backing(RAMBlock* block) { |
| 2519 | |
| 2520 | if (block->fd >= 0) { |
| 2521 | qemu_ram_munmap(block->host, block->max_length); |
| 2522 | #ifdef _WIN32 |
| 2523 | _close(block->fd); |
| 2524 | #else |
| 2525 | close(block->fd); |
| 2526 | #endif |
| 2527 | block->fd = -1; |
| 2528 | } else { |
| 2529 | qemu_anon_ram_free(block->host, block->max_length); |
| 2530 | } |
| 2531 | |
| 2532 | if (block->path) { |
| 2533 | g_free((void*)block->path); |
| 2534 | block->path = NULL; |
| 2535 | } |
| 2536 | |
| 2537 | block->flags = 0; |
| 2538 | } |
| 2539 | |
| 2540 | void ram_block_remap_backing(RAMBlock* block, const char* mem_path, int shared) |
| 2541 | { |
| 2542 | rcu_read_lock(); |
| 2543 | |
| 2544 | // Check against bad usage, since the first move of this function |
| 2545 | // is to free |block->path|. |
| 2546 | if (mem_path && block->path && |
| 2547 | (mem_path == block->path)) { |
| 2548 | qemu_abort( |
| 2549 | "%s: Not allowed to alias mem_path and block->path!\n", |
| 2550 | __func__); |
| 2551 | } |
| 2552 | |
| 2553 | ram_block_teardown_backing(block); |
| 2554 | |
| 2555 | if (mem_path) { |
| 2556 | block->path = g_strdup(mem_path); |
| 2557 | block->flags = RAM_MAPPED | (shared ? RAM_SHARED : 0); |
| 2558 | |
| 2559 | // Assume it exists |
| 2560 | block->fd = try_open_existing_ram_file(block->path); |
| 2561 | |
| 2562 | if (block->fd < 0) { |
| 2563 | rcu_read_unlock(); |
| 2564 | qemu_abort( |
| 2565 | "error opening new ram file " |
| 2566 | "for guest memory '%s' at %s\n", |
| 2567 | memory_region_name(block->mr), |
| 2568 | block->path); |
| 2569 | abort(); |
| 2570 | } |
| 2571 | |
| 2572 | // Assume the mapped size hasn't changed |
| 2573 | block->host = |
| 2574 | qemu_ram_mmap( |
| 2575 | block->fd, |
| 2576 | block->mapped_size, |
| 2577 | block->mr->align, |
| 2578 | block->flags & RAM_SHARED); |
| 2579 | |
| 2580 | if (!block->host) { |
| 2581 | rcu_read_unlock(); |
| 2582 | qemu_abort("cannot remap backing for guest memory '%s' " |
| 2583 | "to new file (shared: %d)", |
| 2584 | memory_region_name(block->mr), |
| 2585 | shared); |
| 2586 | } |
| 2587 | } else { |
| 2588 | block->host = |
| 2589 | phys_mem_alloc( |
| 2590 | block->max_length, |
| 2591 | &block->mr->align, |
| 2592 | shared); |
| 2593 | |
| 2594 | if (!block->host) { |
| 2595 | rcu_read_unlock(); |
| 2596 | |
| 2597 | if (insufficientMemMessage) { |
| 2598 | // Insufficient for allocation; exit. |
| 2599 | _exit(1); |
| 2600 | } |
| 2601 | |
| 2602 | // Fatal error in allocation. |
| 2603 | qemu_abort( |
| 2604 | "cannot remap backing for guest memory '%s' " |
| 2605 | "to anonymous backing", |
| 2606 | memory_region_name(block->mr)); |
| 2607 | abort(); |
| 2608 | } |
| 2609 | } |
| 2610 | |
| 2611 | rcu_read_unlock(); |
| 2612 | } |
| 2613 | |
| 2614 | void ram_blocks_remap_shared(int shared) |
| 2615 | { |
| 2616 | RAMBlock *block; |
| 2617 | |
| 2618 | RAMBLOCK_FOREACH(block) { |
| 2619 | char* remap_path; |
| 2620 | |
| 2621 | if (!block->path) continue; |
| 2622 | |
| 2623 | remap_path = g_strdup(block->path); |
| 2624 | ram_block_remap_backing(block, remap_path, shared); |
| 2625 | g_free(remap_path); |
| 2626 | } |
| 2627 | |
| 2628 | memory_listeners_refresh_topology(); |
| 2629 | } |
| 2630 | |
Paolo Bonzini | 1b5ec23 | 2013-05-06 14:36:15 +0200 | [diff] [blame] | 2631 | /* Return a host pointer to ram allocated with qemu_ram_alloc. |
Mike Day | ae3a704 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2632 | * This should not be used for general purpose DMA. Use address_space_map |
| 2633 | * or address_space_rw instead. For local memory (e.g. video ram) that the |
| 2634 | * device owns, use memory_region_get_ram_ptr. |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2635 | * |
Paolo Bonzini | 49b24af | 2015-12-16 10:30:47 +0100 | [diff] [blame] | 2636 | * Called within RCU critical section. |
Paolo Bonzini | 1b5ec23 | 2013-05-06 14:36:15 +0200 | [diff] [blame] | 2637 | */ |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2638 | void *qemu_map_ram_ptr(RAMBlock *ram_block, ram_addr_t addr) |
Paolo Bonzini | 1b5ec23 | 2013-05-06 14:36:15 +0200 | [diff] [blame] | 2639 | { |
Gonglei | 3655cb9 | 2016-02-20 10:35:20 +0800 | [diff] [blame] | 2640 | RAMBlock *block = ram_block; |
| 2641 | |
| 2642 | if (block == NULL) { |
| 2643 | block = qemu_get_ram_block(addr); |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2644 | addr -= block->offset; |
Gonglei | 3655cb9 | 2016-02-20 10:35:20 +0800 | [diff] [blame] | 2645 | } |
Mike Day | ae3a704 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2646 | |
| 2647 | if (xen_enabled() && block->host == NULL) { |
Paolo Bonzini | 0d6d3c8 | 2012-11-14 15:45:02 +0100 | [diff] [blame] | 2648 | /* We need to check if the requested address is in the RAM |
| 2649 | * because we don't want to map the entire memory in QEMU. |
| 2650 | * In that case just map until the end of the page. |
| 2651 | */ |
| 2652 | if (block->offset == 0) { |
Stefano Stabellini | 1ff7c59 | 2017-05-03 14:00:35 -0700 | [diff] [blame] | 2653 | return xen_map_cache(addr, 0, 0, false); |
Paolo Bonzini | 0d6d3c8 | 2012-11-14 15:45:02 +0100 | [diff] [blame] | 2654 | } |
Mike Day | ae3a704 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2655 | |
Stefano Stabellini | 1ff7c59 | 2017-05-03 14:00:35 -0700 | [diff] [blame] | 2656 | block->host = xen_map_cache(block->offset, block->max_length, 1, false); |
Paolo Bonzini | 0d6d3c8 | 2012-11-14 15:45:02 +0100 | [diff] [blame] | 2657 | } |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2658 | return ramblock_ptr(block, addr); |
pbrook | dc828ca | 2009-04-09 22:21:07 +0000 | [diff] [blame] | 2659 | } |
| 2660 | |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2661 | /* Return a host pointer to guest's ram. Similar to qemu_map_ram_ptr |
Mike Day | ae3a704 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2662 | * but takes a size argument. |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2663 | * |
Paolo Bonzini | e81bcda | 2015-12-16 10:31:26 +0100 | [diff] [blame] | 2664 | * Called within RCU critical section. |
Mike Day | ae3a704 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2665 | */ |
Gonglei | 3655cb9 | 2016-02-20 10:35:20 +0800 | [diff] [blame] | 2666 | static void *qemu_ram_ptr_length(RAMBlock *ram_block, ram_addr_t addr, |
Anthony PERARD | f5aa69b | 2017-07-26 17:53:26 +0100 | [diff] [blame] | 2667 | hwaddr *size, bool lock) |
Stefano Stabellini | 38bee5d | 2011-05-19 18:35:45 +0100 | [diff] [blame] | 2668 | { |
Gonglei | 3655cb9 | 2016-02-20 10:35:20 +0800 | [diff] [blame] | 2669 | RAMBlock *block = ram_block; |
Stefano Stabellini | 8ab934f | 2011-06-27 18:26:06 +0100 | [diff] [blame] | 2670 | if (*size == 0) { |
| 2671 | return NULL; |
| 2672 | } |
Paolo Bonzini | e81bcda | 2015-12-16 10:31:26 +0100 | [diff] [blame] | 2673 | |
Gonglei | 3655cb9 | 2016-02-20 10:35:20 +0800 | [diff] [blame] | 2674 | if (block == NULL) { |
| 2675 | block = qemu_get_ram_block(addr); |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2676 | addr -= block->offset; |
Gonglei | 3655cb9 | 2016-02-20 10:35:20 +0800 | [diff] [blame] | 2677 | } |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2678 | *size = MIN(*size, block->max_length - addr); |
Paolo Bonzini | e81bcda | 2015-12-16 10:31:26 +0100 | [diff] [blame] | 2679 | |
| 2680 | if (xen_enabled() && block->host == NULL) { |
| 2681 | /* We need to check if the requested address is in the RAM |
| 2682 | * because we don't want to map the entire memory in QEMU. |
| 2683 | * In that case just map the requested area. |
| 2684 | */ |
| 2685 | if (block->offset == 0) { |
Anthony PERARD | f5aa69b | 2017-07-26 17:53:26 +0100 | [diff] [blame] | 2686 | return xen_map_cache(addr, *size, lock, lock); |
Stefano Stabellini | 38bee5d | 2011-05-19 18:35:45 +0100 | [diff] [blame] | 2687 | } |
| 2688 | |
Anthony PERARD | f5aa69b | 2017-07-26 17:53:26 +0100 | [diff] [blame] | 2689 | block->host = xen_map_cache(block->offset, block->max_length, 1, lock); |
Stefano Stabellini | 38bee5d | 2011-05-19 18:35:45 +0100 | [diff] [blame] | 2690 | } |
Paolo Bonzini | e81bcda | 2015-12-16 10:31:26 +0100 | [diff] [blame] | 2691 | |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2692 | return ramblock_ptr(block, addr); |
Stefano Stabellini | 38bee5d | 2011-05-19 18:35:45 +0100 | [diff] [blame] | 2693 | } |
| 2694 | |
Dr. David Alan Gilbert | f90bb71 | 2018-03-12 17:20:57 +0000 | [diff] [blame] | 2695 | /* Return the offset of a hostpointer within a ramblock */ |
| 2696 | ram_addr_t qemu_ram_block_host_offset(RAMBlock *rb, void *host) |
| 2697 | { |
| 2698 | ram_addr_t res = (uint8_t *)host - (uint8_t *)rb->host; |
| 2699 | assert((uintptr_t)host >= (uintptr_t)rb->host); |
| 2700 | assert(res < rb->max_length); |
| 2701 | |
| 2702 | return res; |
| 2703 | } |
| 2704 | |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2705 | /* |
| 2706 | * Translates a host ptr back to a RAMBlock, a ram_addr and an offset |
| 2707 | * in that RAMBlock. |
| 2708 | * |
| 2709 | * ptr: Host pointer to look up |
| 2710 | * round_offset: If true round the result offset down to a page boundary |
| 2711 | * *ram_addr: set to result ram_addr |
| 2712 | * *offset: set to result offset within the RAMBlock |
| 2713 | * |
| 2714 | * Returns: RAMBlock (or NULL if not found) |
Mike Day | ae3a704 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2715 | * |
| 2716 | * By the time this function returns, the returned pointer is not protected |
| 2717 | * by RCU anymore. If the caller is not within an RCU critical section and |
| 2718 | * does not hold the iothread lock, it must have other means of protecting the |
| 2719 | * pointer, such as a reference to the region that includes the incoming |
| 2720 | * ram_addr_t. |
| 2721 | */ |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2722 | RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset, |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2723 | ram_addr_t *offset) |
pbrook | 5579c7f | 2009-04-11 14:47:08 +0000 | [diff] [blame] | 2724 | { |
pbrook | 94a6b54 | 2009-04-11 17:15:54 +0000 | [diff] [blame] | 2725 | RAMBlock *block; |
| 2726 | uint8_t *host = ptr; |
| 2727 | |
Jan Kiszka | 868bb33 | 2011-06-21 22:59:09 +0200 | [diff] [blame] | 2728 | if (xen_enabled()) { |
Paolo Bonzini | f615f39 | 2016-05-26 10:07:50 +0200 | [diff] [blame] | 2729 | ram_addr_t ram_addr; |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2730 | rcu_read_lock(); |
Paolo Bonzini | f615f39 | 2016-05-26 10:07:50 +0200 | [diff] [blame] | 2731 | ram_addr = xen_ram_addr_from_mapcache(ptr); |
| 2732 | block = qemu_get_ram_block(ram_addr); |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2733 | if (block) { |
Anthony PERARD | d6b6aec | 2016-06-09 16:56:17 +0100 | [diff] [blame] | 2734 | *offset = ram_addr - block->offset; |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2735 | } |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2736 | rcu_read_unlock(); |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2737 | return block; |
Stefano Stabellini | 712c2b4 | 2011-05-19 18:35:46 +0100 | [diff] [blame] | 2738 | } |
| 2739 | |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2740 | rcu_read_lock(); |
| 2741 | block = atomic_rcu_read(&ram_list.mru_block); |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 2742 | if (block && block->host && host - block->host < block->max_length) { |
Paolo Bonzini | 23887b7 | 2013-05-06 14:28:39 +0200 | [diff] [blame] | 2743 | goto found; |
| 2744 | } |
| 2745 | |
Peter Xu | 99e1558 | 2017-05-12 12:17:39 +0800 | [diff] [blame] | 2746 | RAMBLOCK_FOREACH(block) { |
Jun Nakajima | 432d268 | 2010-08-31 16:41:25 +0100 | [diff] [blame] | 2747 | /* This case append when the block is not mapped. */ |
| 2748 | if (block->host == NULL) { |
| 2749 | continue; |
| 2750 | } |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 2751 | if (host - block->host < block->max_length) { |
Paolo Bonzini | 23887b7 | 2013-05-06 14:28:39 +0200 | [diff] [blame] | 2752 | goto found; |
Alex Williamson | f471a17 | 2010-06-11 11:11:42 -0600 | [diff] [blame] | 2753 | } |
pbrook | 94a6b54 | 2009-04-11 17:15:54 +0000 | [diff] [blame] | 2754 | } |
Jun Nakajima | 432d268 | 2010-08-31 16:41:25 +0100 | [diff] [blame] | 2755 | |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2756 | rcu_read_unlock(); |
Paolo Bonzini | 1b5ec23 | 2013-05-06 14:36:15 +0200 | [diff] [blame] | 2757 | return NULL; |
Paolo Bonzini | 23887b7 | 2013-05-06 14:28:39 +0200 | [diff] [blame] | 2758 | |
| 2759 | found: |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2760 | *offset = (host - block->host); |
| 2761 | if (round_offset) { |
| 2762 | *offset &= TARGET_PAGE_MASK; |
| 2763 | } |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2764 | rcu_read_unlock(); |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2765 | return block; |
| 2766 | } |
| 2767 | |
Dr. David Alan Gilbert | e3dd749 | 2015-11-05 18:10:33 +0000 | [diff] [blame] | 2768 | /* |
| 2769 | * Finds the named RAMBlock |
| 2770 | * |
| 2771 | * name: The name of RAMBlock to find |
| 2772 | * |
| 2773 | * Returns: RAMBlock (or NULL if not found) |
| 2774 | */ |
| 2775 | RAMBlock *qemu_ram_block_by_name(const char *name) |
| 2776 | { |
| 2777 | RAMBlock *block; |
| 2778 | |
Peter Xu | 99e1558 | 2017-05-12 12:17:39 +0800 | [diff] [blame] | 2779 | RAMBLOCK_FOREACH(block) { |
Dr. David Alan Gilbert | e3dd749 | 2015-11-05 18:10:33 +0000 | [diff] [blame] | 2780 | if (!strcmp(name, block->idstr)) { |
| 2781 | return block; |
| 2782 | } |
| 2783 | } |
| 2784 | |
| 2785 | return NULL; |
| 2786 | } |
| 2787 | |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2788 | /* Some of the softmmu routines need to translate from a host pointer |
| 2789 | (typically a TLB entry) back to a ram offset. */ |
Paolo Bonzini | 07bdaa4 | 2016-03-25 12:55:08 +0100 | [diff] [blame] | 2790 | ram_addr_t qemu_ram_addr_from_host(void *ptr) |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2791 | { |
| 2792 | RAMBlock *block; |
Paolo Bonzini | f615f39 | 2016-05-26 10:07:50 +0200 | [diff] [blame] | 2793 | ram_addr_t offset; |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2794 | |
Paolo Bonzini | f615f39 | 2016-05-26 10:07:50 +0200 | [diff] [blame] | 2795 | block = qemu_ram_block_from_host(ptr, false, &offset); |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2796 | if (!block) { |
Paolo Bonzini | 07bdaa4 | 2016-03-25 12:55:08 +0100 | [diff] [blame] | 2797 | return RAM_ADDR_INVALID; |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2798 | } |
| 2799 | |
Paolo Bonzini | 07bdaa4 | 2016-03-25 12:55:08 +0100 | [diff] [blame] | 2800 | return block->offset + offset; |
Marcelo Tosatti | e890261 | 2010-10-11 15:31:19 -0300 | [diff] [blame] | 2801 | } |
Alex Williamson | f471a17 | 2010-06-11 11:11:42 -0600 | [diff] [blame] | 2802 | |
Peter Maydell | 2726627 | 2017-11-20 18:08:27 +0000 | [diff] [blame] | 2803 | /* Called within RCU critical section. */ |
| 2804 | void memory_notdirty_write_prepare(NotDirtyInfo *ndi, |
| 2805 | CPUState *cpu, |
| 2806 | vaddr mem_vaddr, |
| 2807 | ram_addr_t ram_addr, |
| 2808 | unsigned size) |
| 2809 | { |
| 2810 | ndi->cpu = cpu; |
| 2811 | ndi->ram_addr = ram_addr; |
| 2812 | ndi->mem_vaddr = mem_vaddr; |
| 2813 | ndi->size = size; |
| 2814 | ndi->locked = false; |
| 2815 | |
| 2816 | assert(tcg_enabled()); |
| 2817 | if (!cpu_physical_memory_get_dirty_flag(ram_addr, DIRTY_MEMORY_CODE)) { |
| 2818 | ndi->locked = true; |
| 2819 | tb_lock(); |
| 2820 | tb_invalidate_phys_page_fast(ram_addr, size); |
| 2821 | } |
| 2822 | } |
| 2823 | |
| 2824 | /* Called within RCU critical section. */ |
| 2825 | void memory_notdirty_write_complete(NotDirtyInfo *ndi) |
| 2826 | { |
| 2827 | if (ndi->locked) { |
| 2828 | tb_unlock(); |
| 2829 | } |
| 2830 | |
| 2831 | /* Set both VGA and migration bits for simplicity and to remove |
| 2832 | * the notdirty callback faster. |
| 2833 | */ |
| 2834 | cpu_physical_memory_set_dirty_range(ndi->ram_addr, ndi->size, |
| 2835 | DIRTY_CLIENTS_NOCODE); |
| 2836 | /* we remove the notdirty callback only if the code has been |
| 2837 | flushed */ |
| 2838 | if (!cpu_physical_memory_is_clean(ndi->ram_addr)) { |
| 2839 | tlb_set_dirty(ndi->cpu, ndi->mem_vaddr); |
| 2840 | } |
| 2841 | } |
| 2842 | |
Paolo Bonzini | 49b24af | 2015-12-16 10:30:47 +0100 | [diff] [blame] | 2843 | /* Called within RCU critical section. */ |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 2844 | static void notdirty_mem_write(void *opaque, hwaddr ram_addr, |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 2845 | uint64_t val, unsigned size) |
bellard | 1ccde1c | 2004-02-06 19:46:14 +0000 | [diff] [blame] | 2846 | { |
Peter Maydell | 2726627 | 2017-11-20 18:08:27 +0000 | [diff] [blame] | 2847 | NotDirtyInfo ndi; |
Alex Bennée | ba051fb | 2016-10-27 16:10:16 +0100 | [diff] [blame] | 2848 | |
Peter Maydell | 2726627 | 2017-11-20 18:08:27 +0000 | [diff] [blame] | 2849 | memory_notdirty_write_prepare(&ndi, current_cpu, current_cpu->mem_io_vaddr, |
| 2850 | ram_addr, size); |
| 2851 | |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 2852 | switch (size) { |
| 2853 | case 1: |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2854 | stb_p(qemu_map_ram_ptr(NULL, ram_addr), val); |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 2855 | break; |
| 2856 | case 2: |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2857 | stw_p(qemu_map_ram_ptr(NULL, ram_addr), val); |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 2858 | break; |
| 2859 | case 4: |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2860 | stl_p(qemu_map_ram_ptr(NULL, ram_addr), val); |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 2861 | break; |
Andrew Baumann | ad52878 | 2017-10-13 11:19:13 -0700 | [diff] [blame] | 2862 | case 8: |
| 2863 | stq_p(qemu_map_ram_ptr(NULL, ram_addr), val); |
| 2864 | break; |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 2865 | default: |
| 2866 | abort(); |
| 2867 | } |
Peter Maydell | 2726627 | 2017-11-20 18:08:27 +0000 | [diff] [blame] | 2868 | memory_notdirty_write_complete(&ndi); |
bellard | 1ccde1c | 2004-02-06 19:46:14 +0000 | [diff] [blame] | 2869 | } |
| 2870 | |
Paolo Bonzini | b018ddf | 2013-05-24 14:48:38 +0200 | [diff] [blame] | 2871 | static bool notdirty_mem_accepts(void *opaque, hwaddr addr, |
| 2872 | unsigned size, bool is_write) |
| 2873 | { |
| 2874 | return is_write; |
| 2875 | } |
| 2876 | |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 2877 | static const MemoryRegionOps notdirty_mem_ops = { |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 2878 | .write = notdirty_mem_write, |
Paolo Bonzini | b018ddf | 2013-05-24 14:48:38 +0200 | [diff] [blame] | 2879 | .valid.accepts = notdirty_mem_accepts, |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 2880 | .endianness = DEVICE_NATIVE_ENDIAN, |
Andrew Baumann | ad52878 | 2017-10-13 11:19:13 -0700 | [diff] [blame] | 2881 | .valid = { |
| 2882 | .min_access_size = 1, |
| 2883 | .max_access_size = 8, |
| 2884 | .unaligned = false, |
| 2885 | }, |
| 2886 | .impl = { |
| 2887 | .min_access_size = 1, |
| 2888 | .max_access_size = 8, |
| 2889 | .unaligned = false, |
| 2890 | }, |
bellard | 1ccde1c | 2004-02-06 19:46:14 +0000 | [diff] [blame] | 2891 | }; |
| 2892 | |
pbrook | 0f459d1 | 2008-06-09 00:20:13 +0000 | [diff] [blame] | 2893 | /* Generate a debug exception if a watchpoint has been hit. */ |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2894 | static void check_watchpoint(int offset, int len, MemTxAttrs attrs, int flags) |
pbrook | 0f459d1 | 2008-06-09 00:20:13 +0000 | [diff] [blame] | 2895 | { |
Andreas Färber | 93afead | 2013-08-26 03:41:01 +0200 | [diff] [blame] | 2896 | CPUState *cpu = current_cpu; |
Sergey Fedorov | 568496c | 2016-02-11 11:17:32 +0000 | [diff] [blame] | 2897 | CPUClass *cc = CPU_GET_CLASS(cpu); |
pbrook | 0f459d1 | 2008-06-09 00:20:13 +0000 | [diff] [blame] | 2898 | target_ulong vaddr; |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 2899 | CPUWatchpoint *wp; |
pbrook | 0f459d1 | 2008-06-09 00:20:13 +0000 | [diff] [blame] | 2900 | |
Paolo Bonzini | 5aa1ef7 | 2017-07-03 17:50:40 +0200 | [diff] [blame] | 2901 | assert(tcg_enabled()); |
Andreas Färber | ff4700b | 2013-08-26 18:23:18 +0200 | [diff] [blame] | 2902 | if (cpu->watchpoint_hit) { |
aliguori | 06d55cc | 2008-11-18 20:24:06 +0000 | [diff] [blame] | 2903 | /* We re-entered the check after replacing the TB. Now raise |
| 2904 | * the debug interrupt so that is will trigger after the |
| 2905 | * current instruction. */ |
Andreas Färber | 93afead | 2013-08-26 03:41:01 +0200 | [diff] [blame] | 2906 | cpu_interrupt(cpu, CPU_INTERRUPT_DEBUG); |
aliguori | 06d55cc | 2008-11-18 20:24:06 +0000 | [diff] [blame] | 2907 | return; |
| 2908 | } |
Andreas Färber | 93afead | 2013-08-26 03:41:01 +0200 | [diff] [blame] | 2909 | vaddr = (cpu->mem_io_vaddr & TARGET_PAGE_MASK) + offset; |
Julian Brown | 4061200 | 2017-02-07 18:29:59 +0000 | [diff] [blame] | 2910 | vaddr = cc->adjust_watchpoint_address(cpu, vaddr, len); |
Andreas Färber | ff4700b | 2013-08-26 18:23:18 +0200 | [diff] [blame] | 2911 | QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { |
Peter Maydell | 05068c0 | 2014-09-12 14:06:48 +0100 | [diff] [blame] | 2912 | if (cpu_watchpoint_address_matches(wp, vaddr, len) |
| 2913 | && (wp->flags & flags)) { |
Peter Maydell | 0822567 | 2014-09-12 14:06:48 +0100 | [diff] [blame] | 2914 | if (flags == BP_MEM_READ) { |
| 2915 | wp->flags |= BP_WATCHPOINT_HIT_READ; |
| 2916 | } else { |
| 2917 | wp->flags |= BP_WATCHPOINT_HIT_WRITE; |
| 2918 | } |
| 2919 | wp->hitaddr = vaddr; |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2920 | wp->hitattrs = attrs; |
Andreas Färber | ff4700b | 2013-08-26 18:23:18 +0200 | [diff] [blame] | 2921 | if (!cpu->watchpoint_hit) { |
Sergey Fedorov | 568496c | 2016-02-11 11:17:32 +0000 | [diff] [blame] | 2922 | if (wp->flags & BP_CPU && |
| 2923 | !cc->debug_check_watchpoint(cpu, wp)) { |
| 2924 | wp->flags &= ~BP_WATCHPOINT_HIT; |
| 2925 | continue; |
| 2926 | } |
Andreas Färber | ff4700b | 2013-08-26 18:23:18 +0200 | [diff] [blame] | 2927 | cpu->watchpoint_hit = wp; |
KONRAD Frederic | a5e9982 | 2016-10-27 16:10:06 +0100 | [diff] [blame] | 2928 | |
Jan Kiszka | 8d04fb5 | 2017-02-23 18:29:11 +0000 | [diff] [blame] | 2929 | /* Both tb_lock and iothread_mutex will be reset when |
| 2930 | * cpu_loop_exit or cpu_loop_exit_noexc longjmp |
| 2931 | * back into the cpu_exec main loop. |
KONRAD Frederic | a5e9982 | 2016-10-27 16:10:06 +0100 | [diff] [blame] | 2932 | */ |
| 2933 | tb_lock(); |
Andreas Färber | 239c51a | 2013-09-01 17:12:23 +0200 | [diff] [blame] | 2934 | tb_check_watchpoint(cpu); |
aliguori | 6e140f2 | 2008-11-18 20:37:55 +0000 | [diff] [blame] | 2935 | if (wp->flags & BP_STOP_BEFORE_ACCESS) { |
Andreas Färber | 2710342 | 2013-08-26 08:31:06 +0200 | [diff] [blame] | 2936 | cpu->exception_index = EXCP_DEBUG; |
Andreas Färber | 5638d18 | 2013-08-27 17:52:12 +0200 | [diff] [blame] | 2937 | cpu_loop_exit(cpu); |
aliguori | 6e140f2 | 2008-11-18 20:37:55 +0000 | [diff] [blame] | 2938 | } else { |
Richard Henderson | 9b990ee | 2017-10-13 10:50:02 -0700 | [diff] [blame] | 2939 | /* Force execution of one insn next time. */ |
| 2940 | cpu->cflags_next_tb = 1 | curr_cflags(); |
Peter Maydell | 6886b98 | 2016-05-17 15:18:04 +0100 | [diff] [blame] | 2941 | cpu_loop_exit_noexc(cpu); |
aliguori | 6e140f2 | 2008-11-18 20:37:55 +0000 | [diff] [blame] | 2942 | } |
aliguori | 06d55cc | 2008-11-18 20:24:06 +0000 | [diff] [blame] | 2943 | } |
aliguori | 6e140f2 | 2008-11-18 20:37:55 +0000 | [diff] [blame] | 2944 | } else { |
| 2945 | wp->flags &= ~BP_WATCHPOINT_HIT; |
pbrook | 0f459d1 | 2008-06-09 00:20:13 +0000 | [diff] [blame] | 2946 | } |
| 2947 | } |
| 2948 | } |
| 2949 | |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 2950 | /* Watchpoint access routines. Watchpoints are inserted using TLB tricks, |
| 2951 | so these check for a hit then pass through to the normal out-of-line |
| 2952 | phys routines. */ |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2953 | static MemTxResult watch_mem_read(void *opaque, hwaddr addr, uint64_t *pdata, |
| 2954 | unsigned size, MemTxAttrs attrs) |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 2955 | { |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2956 | MemTxResult res; |
| 2957 | uint64_t data; |
Peter Maydell | 79ed041 | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 2958 | int asidx = cpu_asidx_from_attrs(current_cpu, attrs); |
| 2959 | AddressSpace *as = current_cpu->cpu_ases[asidx].as; |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 2960 | |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2961 | check_watchpoint(addr & ~TARGET_PAGE_MASK, size, attrs, BP_MEM_READ); |
Avi Kivity | 1ec9b90 | 2012-01-02 12:47:48 +0200 | [diff] [blame] | 2962 | switch (size) { |
Max Filippov | 6736415 | 2012-01-29 00:01:40 +0400 | [diff] [blame] | 2963 | case 1: |
Peter Maydell | 79ed041 | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 2964 | data = address_space_ldub(as, addr, attrs, &res); |
Max Filippov | 6736415 | 2012-01-29 00:01:40 +0400 | [diff] [blame] | 2965 | break; |
| 2966 | case 2: |
Peter Maydell | 79ed041 | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 2967 | data = address_space_lduw(as, addr, attrs, &res); |
Max Filippov | 6736415 | 2012-01-29 00:01:40 +0400 | [diff] [blame] | 2968 | break; |
| 2969 | case 4: |
Peter Maydell | 79ed041 | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 2970 | data = address_space_ldl(as, addr, attrs, &res); |
Max Filippov | 6736415 | 2012-01-29 00:01:40 +0400 | [diff] [blame] | 2971 | break; |
Paolo Bonzini | 306526b | 2017-10-17 14:16:05 +0200 | [diff] [blame] | 2972 | case 8: |
| 2973 | data = address_space_ldq(as, addr, attrs, &res); |
| 2974 | break; |
Avi Kivity | 1ec9b90 | 2012-01-02 12:47:48 +0200 | [diff] [blame] | 2975 | default: abort(); |
| 2976 | } |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2977 | *pdata = data; |
| 2978 | return res; |
| 2979 | } |
| 2980 | |
| 2981 | static MemTxResult watch_mem_write(void *opaque, hwaddr addr, |
| 2982 | uint64_t val, unsigned size, |
| 2983 | MemTxAttrs attrs) |
| 2984 | { |
| 2985 | MemTxResult res; |
Peter Maydell | 79ed041 | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 2986 | int asidx = cpu_asidx_from_attrs(current_cpu, attrs); |
| 2987 | AddressSpace *as = current_cpu->cpu_ases[asidx].as; |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2988 | |
| 2989 | check_watchpoint(addr & ~TARGET_PAGE_MASK, size, attrs, BP_MEM_WRITE); |
| 2990 | switch (size) { |
| 2991 | case 1: |
Peter Maydell | 79ed041 | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 2992 | address_space_stb(as, addr, val, attrs, &res); |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2993 | break; |
| 2994 | case 2: |
Peter Maydell | 79ed041 | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 2995 | address_space_stw(as, addr, val, attrs, &res); |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2996 | break; |
| 2997 | case 4: |
Peter Maydell | 79ed041 | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 2998 | address_space_stl(as, addr, val, attrs, &res); |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2999 | break; |
Paolo Bonzini | 306526b | 2017-10-17 14:16:05 +0200 | [diff] [blame] | 3000 | case 8: |
| 3001 | address_space_stq(as, addr, val, attrs, &res); |
| 3002 | break; |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 3003 | default: abort(); |
| 3004 | } |
| 3005 | return res; |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 3006 | } |
| 3007 | |
Avi Kivity | 1ec9b90 | 2012-01-02 12:47:48 +0200 | [diff] [blame] | 3008 | static const MemoryRegionOps watch_mem_ops = { |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 3009 | .read_with_attrs = watch_mem_read, |
| 3010 | .write_with_attrs = watch_mem_write, |
Avi Kivity | 1ec9b90 | 2012-01-02 12:47:48 +0200 | [diff] [blame] | 3011 | .endianness = DEVICE_NATIVE_ENDIAN, |
Paolo Bonzini | 306526b | 2017-10-17 14:16:05 +0200 | [diff] [blame] | 3012 | .valid = { |
| 3013 | .min_access_size = 1, |
| 3014 | .max_access_size = 8, |
| 3015 | .unaligned = false, |
| 3016 | }, |
| 3017 | .impl = { |
| 3018 | .min_access_size = 1, |
| 3019 | .max_access_size = 8, |
| 3020 | .unaligned = false, |
| 3021 | }, |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 3022 | }; |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 3023 | |
Paolo Bonzini | b2a44fc | 2018-03-05 00:19:49 +0100 | [diff] [blame] | 3024 | static MemTxResult flatview_read(FlatView *fv, hwaddr addr, |
| 3025 | MemTxAttrs attrs, uint8_t *buf, int len); |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3026 | static MemTxResult flatview_write(FlatView *fv, hwaddr addr, MemTxAttrs attrs, |
| 3027 | const uint8_t *buf, int len); |
| 3028 | static bool flatview_access_valid(FlatView *fv, hwaddr addr, int len, |
| 3029 | bool is_write); |
| 3030 | |
Peter Maydell | f25a49e | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 3031 | static MemTxResult subpage_read(void *opaque, hwaddr addr, uint64_t *data, |
| 3032 | unsigned len, MemTxAttrs attrs) |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 3033 | { |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 3034 | subpage_t *subpage = opaque; |
Paolo Bonzini | ff6cff7 | 2014-12-22 13:11:39 +0100 | [diff] [blame] | 3035 | uint8_t buf[8]; |
Peter Maydell | 5c9eb02 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 3036 | MemTxResult res; |
Paolo Bonzini | 791af8c | 2013-05-24 16:10:39 +0200 | [diff] [blame] | 3037 | |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 3038 | #if defined(DEBUG_SUBPAGE) |
Amos Kong | 016e9d6 | 2013-09-27 09:25:38 +0800 | [diff] [blame] | 3039 | printf("%s: subpage %p len %u addr " TARGET_FMT_plx "\n", __func__, |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 3040 | subpage, len, addr); |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 3041 | #endif |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3042 | res = flatview_read(subpage->fv, addr + subpage->base, attrs, buf, len); |
Peter Maydell | 5c9eb02 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 3043 | if (res) { |
| 3044 | return res; |
Peter Maydell | f25a49e | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 3045 | } |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 3046 | switch (len) { |
| 3047 | case 1: |
Peter Maydell | f25a49e | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 3048 | *data = ldub_p(buf); |
| 3049 | return MEMTX_OK; |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 3050 | case 2: |
Peter Maydell | f25a49e | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 3051 | *data = lduw_p(buf); |
| 3052 | return MEMTX_OK; |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 3053 | case 4: |
Peter Maydell | f25a49e | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 3054 | *data = ldl_p(buf); |
| 3055 | return MEMTX_OK; |
Paolo Bonzini | ff6cff7 | 2014-12-22 13:11:39 +0100 | [diff] [blame] | 3056 | case 8: |
Peter Maydell | f25a49e | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 3057 | *data = ldq_p(buf); |
| 3058 | return MEMTX_OK; |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 3059 | default: |
| 3060 | abort(); |
| 3061 | } |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 3062 | } |
| 3063 | |
Peter Maydell | f25a49e | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 3064 | static MemTxResult subpage_write(void *opaque, hwaddr addr, |
| 3065 | uint64_t value, unsigned len, MemTxAttrs attrs) |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 3066 | { |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 3067 | subpage_t *subpage = opaque; |
Paolo Bonzini | ff6cff7 | 2014-12-22 13:11:39 +0100 | [diff] [blame] | 3068 | uint8_t buf[8]; |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 3069 | |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 3070 | #if defined(DEBUG_SUBPAGE) |
Amos Kong | 016e9d6 | 2013-09-27 09:25:38 +0800 | [diff] [blame] | 3071 | printf("%s: subpage %p len %u addr " TARGET_FMT_plx |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 3072 | " value %"PRIx64"\n", |
| 3073 | __func__, subpage, len, addr, value); |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 3074 | #endif |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 3075 | switch (len) { |
| 3076 | case 1: |
| 3077 | stb_p(buf, value); |
| 3078 | break; |
| 3079 | case 2: |
| 3080 | stw_p(buf, value); |
| 3081 | break; |
| 3082 | case 4: |
| 3083 | stl_p(buf, value); |
| 3084 | break; |
Paolo Bonzini | ff6cff7 | 2014-12-22 13:11:39 +0100 | [diff] [blame] | 3085 | case 8: |
| 3086 | stq_p(buf, value); |
| 3087 | break; |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 3088 | default: |
| 3089 | abort(); |
| 3090 | } |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3091 | return flatview_write(subpage->fv, addr + subpage->base, attrs, buf, len); |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 3092 | } |
| 3093 | |
Paolo Bonzini | c353e4c | 2013-05-24 14:02:39 +0200 | [diff] [blame] | 3094 | static bool subpage_accepts(void *opaque, hwaddr addr, |
Amos Kong | 016e9d6 | 2013-09-27 09:25:38 +0800 | [diff] [blame] | 3095 | unsigned len, bool is_write) |
Paolo Bonzini | c353e4c | 2013-05-24 14:02:39 +0200 | [diff] [blame] | 3096 | { |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 3097 | subpage_t *subpage = opaque; |
Paolo Bonzini | c353e4c | 2013-05-24 14:02:39 +0200 | [diff] [blame] | 3098 | #if defined(DEBUG_SUBPAGE) |
Amos Kong | 016e9d6 | 2013-09-27 09:25:38 +0800 | [diff] [blame] | 3099 | printf("%s: subpage %p %c len %u addr " TARGET_FMT_plx "\n", |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 3100 | __func__, subpage, is_write ? 'w' : 'r', len, addr); |
Paolo Bonzini | c353e4c | 2013-05-24 14:02:39 +0200 | [diff] [blame] | 3101 | #endif |
| 3102 | |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3103 | return flatview_access_valid(subpage->fv, addr + subpage->base, |
| 3104 | len, is_write); |
Paolo Bonzini | c353e4c | 2013-05-24 14:02:39 +0200 | [diff] [blame] | 3105 | } |
| 3106 | |
Avi Kivity | 70c68e4 | 2012-01-02 12:32:48 +0200 | [diff] [blame] | 3107 | static const MemoryRegionOps subpage_ops = { |
Peter Maydell | f25a49e | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 3108 | .read_with_attrs = subpage_read, |
| 3109 | .write_with_attrs = subpage_write, |
Paolo Bonzini | ff6cff7 | 2014-12-22 13:11:39 +0100 | [diff] [blame] | 3110 | .impl.min_access_size = 1, |
| 3111 | .impl.max_access_size = 8, |
| 3112 | .valid.min_access_size = 1, |
| 3113 | .valid.max_access_size = 8, |
Paolo Bonzini | c353e4c | 2013-05-24 14:02:39 +0200 | [diff] [blame] | 3114 | .valid.accepts = subpage_accepts, |
Avi Kivity | 70c68e4 | 2012-01-02 12:32:48 +0200 | [diff] [blame] | 3115 | .endianness = DEVICE_NATIVE_ENDIAN, |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 3116 | }; |
| 3117 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 3118 | static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 3119 | uint16_t section) |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 3120 | { |
| 3121 | int idx, eidx; |
| 3122 | |
| 3123 | if (start >= TARGET_PAGE_SIZE || end >= TARGET_PAGE_SIZE) |
| 3124 | return -1; |
| 3125 | idx = SUBPAGE_IDX(start); |
| 3126 | eidx = SUBPAGE_IDX(end); |
| 3127 | #if defined(DEBUG_SUBPAGE) |
Amos Kong | 016e9d6 | 2013-09-27 09:25:38 +0800 | [diff] [blame] | 3128 | printf("%s: %p start %08x end %08x idx %08x eidx %08x section %d\n", |
| 3129 | __func__, mmio, start, end, idx, eidx, section); |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 3130 | #endif |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 3131 | for (; idx <= eidx; idx++) { |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 3132 | mmio->sub_section[idx] = section; |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 3133 | } |
| 3134 | |
| 3135 | return 0; |
| 3136 | } |
| 3137 | |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3138 | static subpage_t *subpage_init(FlatView *fv, hwaddr base) |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 3139 | { |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 3140 | subpage_t *mmio; |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 3141 | |
Vijaya Kumar K | 2615fab | 2016-10-24 16:26:49 +0100 | [diff] [blame] | 3142 | mmio = g_malloc0(sizeof(subpage_t) + TARGET_PAGE_SIZE * sizeof(uint16_t)); |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3143 | mmio->fv = fv; |
aliguori | 1eec614 | 2009-02-05 22:06:18 +0000 | [diff] [blame] | 3144 | mmio->base = base; |
Paolo Bonzini | 2c9b15c | 2013-06-06 05:41:28 -0400 | [diff] [blame] | 3145 | memory_region_init_io(&mmio->iomem, NULL, &subpage_ops, mmio, |
Peter Crosthwaite | b4fefef | 2014-06-05 23:15:52 -0700 | [diff] [blame] | 3146 | NULL, TARGET_PAGE_SIZE); |
Avi Kivity | b3b00c7 | 2012-01-02 13:20:11 +0200 | [diff] [blame] | 3147 | mmio->iomem.subpage = true; |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 3148 | #if defined(DEBUG_SUBPAGE) |
Amos Kong | 016e9d6 | 2013-09-27 09:25:38 +0800 | [diff] [blame] | 3149 | printf("%s: %p base " TARGET_FMT_plx " len %08x\n", __func__, |
| 3150 | mmio, base, TARGET_PAGE_SIZE); |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 3151 | #endif |
Liu Ping Fan | b41aac4 | 2013-05-29 11:09:17 +0200 | [diff] [blame] | 3152 | subpage_register(mmio, 0, TARGET_PAGE_SIZE-1, PHYS_SECTION_UNASSIGNED); |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 3153 | |
| 3154 | return mmio; |
| 3155 | } |
| 3156 | |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3157 | static uint16_t dummy_section(PhysPageMap *map, FlatView *fv, MemoryRegion *mr) |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 3158 | { |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3159 | assert(fv); |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 3160 | MemoryRegionSection section = { |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3161 | .fv = fv, |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 3162 | .mr = mr, |
| 3163 | .offset_within_address_space = 0, |
| 3164 | .offset_within_region = 0, |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 3165 | .size = int128_2_64(), |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 3166 | }; |
| 3167 | |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 3168 | return phys_section_add(map, §ion); |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 3169 | } |
| 3170 | |
Peter Maydell | 8af3674 | 2017-12-13 17:52:28 +0000 | [diff] [blame] | 3171 | static void readonly_mem_write(void *opaque, hwaddr addr, |
| 3172 | uint64_t val, unsigned size) |
| 3173 | { |
| 3174 | /* Ignore any write to ROM. */ |
| 3175 | } |
| 3176 | |
| 3177 | static bool readonly_mem_accepts(void *opaque, hwaddr addr, |
| 3178 | unsigned size, bool is_write) |
| 3179 | { |
| 3180 | return is_write; |
| 3181 | } |
| 3182 | |
| 3183 | /* This will only be used for writes, because reads are special cased |
| 3184 | * to directly access the underlying host ram. |
| 3185 | */ |
| 3186 | static const MemoryRegionOps readonly_mem_ops = { |
| 3187 | .write = readonly_mem_write, |
| 3188 | .valid.accepts = readonly_mem_accepts, |
| 3189 | .endianness = DEVICE_NATIVE_ENDIAN, |
| 3190 | .valid = { |
| 3191 | .min_access_size = 1, |
| 3192 | .max_access_size = 8, |
| 3193 | .unaligned = false, |
| 3194 | }, |
| 3195 | .impl = { |
| 3196 | .min_access_size = 1, |
| 3197 | .max_access_size = 8, |
| 3198 | .unaligned = false, |
| 3199 | }, |
| 3200 | }; |
| 3201 | |
Peter Maydell | a54c87b | 2016-01-21 14:15:05 +0000 | [diff] [blame] | 3202 | MemoryRegion *iotlb_to_region(CPUState *cpu, hwaddr index, MemTxAttrs attrs) |
Avi Kivity | aa10223 | 2012-03-08 17:06:55 +0200 | [diff] [blame] | 3203 | { |
Peter Maydell | a54c87b | 2016-01-21 14:15:05 +0000 | [diff] [blame] | 3204 | int asidx = cpu_asidx_from_attrs(cpu, attrs); |
| 3205 | CPUAddressSpace *cpuas = &cpu->cpu_ases[asidx]; |
Peter Maydell | 32857f4 | 2015-10-01 15:29:50 +0100 | [diff] [blame] | 3206 | AddressSpaceDispatch *d = atomic_rcu_read(&cpuas->memory_dispatch); |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 3207 | MemoryRegionSection *sections = d->map.sections; |
Paolo Bonzini | 9d82b5a | 2013-08-16 08:26:30 +0200 | [diff] [blame] | 3208 | |
| 3209 | return sections[index & ~TARGET_PAGE_MASK].mr; |
Avi Kivity | aa10223 | 2012-03-08 17:06:55 +0200 | [diff] [blame] | 3210 | } |
| 3211 | |
Avi Kivity | e9179ce | 2009-06-14 11:38:52 +0300 | [diff] [blame] | 3212 | static void io_mem_init(void) |
| 3213 | { |
Peter Maydell | 8af3674 | 2017-12-13 17:52:28 +0000 | [diff] [blame] | 3214 | memory_region_init_io(&io_mem_rom, NULL, &readonly_mem_ops, |
| 3215 | NULL, NULL, UINT64_MAX); |
Paolo Bonzini | 2c9b15c | 2013-06-06 05:41:28 -0400 | [diff] [blame] | 3216 | memory_region_init_io(&io_mem_unassigned, NULL, &unassigned_mem_ops, NULL, |
Paolo Bonzini | 1f6245e | 2014-06-13 10:48:06 +0200 | [diff] [blame] | 3217 | NULL, UINT64_MAX); |
Jan Kiszka | 8d04fb5 | 2017-02-23 18:29:11 +0000 | [diff] [blame] | 3218 | |
| 3219 | /* io_mem_notdirty calls tb_invalidate_phys_page_fast, |
| 3220 | * which can be called without the iothread mutex. |
| 3221 | */ |
Paolo Bonzini | 2c9b15c | 2013-06-06 05:41:28 -0400 | [diff] [blame] | 3222 | memory_region_init_io(&io_mem_notdirty, NULL, ¬dirty_mem_ops, NULL, |
Paolo Bonzini | 1f6245e | 2014-06-13 10:48:06 +0200 | [diff] [blame] | 3223 | NULL, UINT64_MAX); |
Jan Kiszka | 8d04fb5 | 2017-02-23 18:29:11 +0000 | [diff] [blame] | 3224 | memory_region_clear_global_locking(&io_mem_notdirty); |
| 3225 | |
Paolo Bonzini | 2c9b15c | 2013-06-06 05:41:28 -0400 | [diff] [blame] | 3226 | memory_region_init_io(&io_mem_watch, NULL, &watch_mem_ops, NULL, |
Paolo Bonzini | 1f6245e | 2014-06-13 10:48:06 +0200 | [diff] [blame] | 3227 | NULL, UINT64_MAX); |
Avi Kivity | e9179ce | 2009-06-14 11:38:52 +0300 | [diff] [blame] | 3228 | } |
| 3229 | |
Alexey Kardashevskiy | 8629d3f | 2017-09-21 18:51:00 +1000 | [diff] [blame] | 3230 | AddressSpaceDispatch *address_space_dispatch_new(FlatView *fv) |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 3231 | { |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 3232 | AddressSpaceDispatch *d = g_new0(AddressSpaceDispatch, 1); |
| 3233 | uint16_t n; |
| 3234 | |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3235 | n = dummy_section(&d->map, fv, &io_mem_unassigned); |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 3236 | assert(n == PHYS_SECTION_UNASSIGNED); |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3237 | n = dummy_section(&d->map, fv, &io_mem_notdirty); |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 3238 | assert(n == PHYS_SECTION_NOTDIRTY); |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3239 | n = dummy_section(&d->map, fv, &io_mem_rom); |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 3240 | assert(n == PHYS_SECTION_ROM); |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3241 | n = dummy_section(&d->map, fv, &io_mem_watch); |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 3242 | assert(n == PHYS_SECTION_WATCH); |
Yurii Zubrytskyi | b01ff82 | 2016-08-25 15:31:03 -0700 | [diff] [blame] | 3243 | (void)n; |
Paolo Bonzini | 0075270 | 2013-05-29 12:13:54 +0200 | [diff] [blame] | 3244 | |
Michael S. Tsirkin | 9736e55 | 2013-11-11 14:42:43 +0200 | [diff] [blame] | 3245 | d->phys_map = (PhysPageEntry) { .ptr = PHYS_MAP_NODE_NIL, .skip = 1 }; |
Alexey Kardashevskiy | 66a6df1 | 2017-09-21 18:50:56 +1000 | [diff] [blame] | 3246 | |
| 3247 | return d; |
Paolo Bonzini | 0075270 | 2013-05-29 12:13:54 +0200 | [diff] [blame] | 3248 | } |
| 3249 | |
Alexey Kardashevskiy | 66a6df1 | 2017-09-21 18:50:56 +1000 | [diff] [blame] | 3250 | void address_space_dispatch_free(AddressSpaceDispatch *d) |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 3251 | { |
| 3252 | phys_sections_free(&d->map); |
| 3253 | g_free(d); |
| 3254 | } |
| 3255 | |
Avi Kivity | 1d71148 | 2012-10-02 18:54:45 +0200 | [diff] [blame] | 3256 | static void tcg_commit(MemoryListener *listener) |
Avi Kivity | 50c1e14 | 2012-02-08 21:36:02 +0200 | [diff] [blame] | 3257 | { |
Peter Maydell | 32857f4 | 2015-10-01 15:29:50 +0100 | [diff] [blame] | 3258 | CPUAddressSpace *cpuas; |
| 3259 | AddressSpaceDispatch *d; |
Avi Kivity | 117712c | 2012-02-12 21:23:17 +0200 | [diff] [blame] | 3260 | |
| 3261 | /* since each CPU stores ram addresses in its TLB cache, we must |
| 3262 | reset the modified entries */ |
Peter Maydell | 32857f4 | 2015-10-01 15:29:50 +0100 | [diff] [blame] | 3263 | cpuas = container_of(listener, CPUAddressSpace, tcg_as_listener); |
| 3264 | cpu_reloading_memory_map(); |
| 3265 | /* The CPU and TLB are protected by the iothread lock. |
| 3266 | * We reload the dispatch pointer now because cpu_reloading_memory_map() |
| 3267 | * may have split the RCU critical section. |
| 3268 | */ |
Alexey Kardashevskiy | 66a6df1 | 2017-09-21 18:50:56 +1000 | [diff] [blame] | 3269 | d = address_space_to_dispatch(cpuas->as); |
Alex Bennée | f35e44e | 2016-10-21 16:34:18 +0100 | [diff] [blame] | 3270 | atomic_rcu_set(&cpuas->memory_dispatch, d); |
Alex Bennée | d10eb08 | 2016-11-14 14:17:28 +0000 | [diff] [blame] | 3271 | tlb_flush(cpuas->cpu); |
Avi Kivity | 50c1e14 | 2012-02-08 21:36:02 +0200 | [diff] [blame] | 3272 | } |
| 3273 | |
Avi Kivity | 62152b8 | 2011-07-26 14:26:14 +0300 | [diff] [blame] | 3274 | static void memory_map_init(void) |
| 3275 | { |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 3276 | system_memory = g_malloc(sizeof(*system_memory)); |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 3277 | |
Paolo Bonzini | 57271d6 | 2013-11-07 17:14:37 +0100 | [diff] [blame] | 3278 | memory_region_init(system_memory, NULL, "system", UINT64_MAX); |
Alexey Kardashevskiy | 7dca804 | 2013-04-29 16:25:51 +0000 | [diff] [blame] | 3279 | address_space_init(&address_space_memory, system_memory, "memory"); |
Avi Kivity | 309cb47 | 2011-08-08 16:09:03 +0300 | [diff] [blame] | 3280 | |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 3281 | system_io = g_malloc(sizeof(*system_io)); |
Jan Kiszka | 3bb28b72 | 2013-09-02 18:43:30 +0200 | [diff] [blame] | 3282 | memory_region_init_io(system_io, NULL, &unassigned_io_ops, NULL, "io", |
| 3283 | 65536); |
Alexey Kardashevskiy | 7dca804 | 2013-04-29 16:25:51 +0000 | [diff] [blame] | 3284 | address_space_init(&address_space_io, system_io, "I/O"); |
Avi Kivity | 62152b8 | 2011-07-26 14:26:14 +0300 | [diff] [blame] | 3285 | } |
| 3286 | |
| 3287 | MemoryRegion *get_system_memory(void) |
| 3288 | { |
| 3289 | return system_memory; |
| 3290 | } |
| 3291 | |
Avi Kivity | 309cb47 | 2011-08-08 16:09:03 +0300 | [diff] [blame] | 3292 | MemoryRegion *get_system_io(void) |
| 3293 | { |
| 3294 | return system_io; |
| 3295 | } |
| 3296 | |
pbrook | e2eef17 | 2008-06-08 01:09:01 +0000 | [diff] [blame] | 3297 | #endif /* !defined(CONFIG_USER_ONLY) */ |
| 3298 | |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3299 | /* physical memory access (slow version, mainly for debug) */ |
| 3300 | #if defined(CONFIG_USER_ONLY) |
Andreas Färber | f17ec44 | 2013-06-29 19:40:58 +0200 | [diff] [blame] | 3301 | int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr, |
Paul Brook | a68fe89 | 2010-03-01 00:08:59 +0000 | [diff] [blame] | 3302 | uint8_t *buf, int len, int is_write) |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3303 | { |
| 3304 | int l, flags; |
| 3305 | target_ulong page; |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 3306 | void * p; |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3307 | |
| 3308 | while (len > 0) { |
| 3309 | page = addr & TARGET_PAGE_MASK; |
| 3310 | l = (page + TARGET_PAGE_SIZE) - addr; |
| 3311 | if (l > len) |
| 3312 | l = len; |
| 3313 | flags = page_get_flags(page); |
| 3314 | if (!(flags & PAGE_VALID)) |
Paul Brook | a68fe89 | 2010-03-01 00:08:59 +0000 | [diff] [blame] | 3315 | return -1; |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3316 | if (is_write) { |
| 3317 | if (!(flags & PAGE_WRITE)) |
Paul Brook | a68fe89 | 2010-03-01 00:08:59 +0000 | [diff] [blame] | 3318 | return -1; |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 3319 | /* XXX: this code should not depend on lock_user */ |
aurel32 | 72fb7da | 2008-04-27 23:53:45 +0000 | [diff] [blame] | 3320 | if (!(p = lock_user(VERIFY_WRITE, addr, l, 0))) |
Paul Brook | a68fe89 | 2010-03-01 00:08:59 +0000 | [diff] [blame] | 3321 | return -1; |
aurel32 | 72fb7da | 2008-04-27 23:53:45 +0000 | [diff] [blame] | 3322 | memcpy(p, buf, l); |
| 3323 | unlock_user(p, addr, l); |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3324 | } else { |
| 3325 | if (!(flags & PAGE_READ)) |
Paul Brook | a68fe89 | 2010-03-01 00:08:59 +0000 | [diff] [blame] | 3326 | return -1; |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 3327 | /* XXX: this code should not depend on lock_user */ |
aurel32 | 72fb7da | 2008-04-27 23:53:45 +0000 | [diff] [blame] | 3328 | if (!(p = lock_user(VERIFY_READ, addr, l, 1))) |
Paul Brook | a68fe89 | 2010-03-01 00:08:59 +0000 | [diff] [blame] | 3329 | return -1; |
aurel32 | 72fb7da | 2008-04-27 23:53:45 +0000 | [diff] [blame] | 3330 | memcpy(buf, p, l); |
aurel32 | 5b25757 | 2008-04-28 08:54:59 +0000 | [diff] [blame] | 3331 | unlock_user(p, addr, 0); |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3332 | } |
| 3333 | len -= l; |
| 3334 | buf += l; |
| 3335 | addr += l; |
| 3336 | } |
Paul Brook | a68fe89 | 2010-03-01 00:08:59 +0000 | [diff] [blame] | 3337 | return 0; |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3338 | } |
bellard | 8df1cd0 | 2005-01-28 22:37:22 +0000 | [diff] [blame] | 3339 | |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3340 | #else |
Anthony PERARD | 51d7a9e | 2012-10-03 13:49:05 +0000 | [diff] [blame] | 3341 | |
Paolo Bonzini | 845b621 | 2015-03-23 11:45:53 +0100 | [diff] [blame] | 3342 | static void invalidate_and_set_dirty(MemoryRegion *mr, hwaddr addr, |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 3343 | hwaddr length) |
Anthony PERARD | 51d7a9e | 2012-10-03 13:49:05 +0000 | [diff] [blame] | 3344 | { |
Paolo Bonzini | e87f777 | 2015-03-25 15:21:39 +0100 | [diff] [blame] | 3345 | uint8_t dirty_log_mask = memory_region_get_dirty_log_mask(mr); |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 3346 | addr += memory_region_get_ram_addr(mr); |
| 3347 | |
Paolo Bonzini | e87f777 | 2015-03-25 15:21:39 +0100 | [diff] [blame] | 3348 | /* No early return if dirty_log_mask is or becomes 0, because |
| 3349 | * cpu_physical_memory_set_dirty_range will still call |
| 3350 | * xen_modified_memory. |
| 3351 | */ |
| 3352 | if (dirty_log_mask) { |
| 3353 | dirty_log_mask = |
| 3354 | cpu_physical_memory_range_includes_clean(addr, length, dirty_log_mask); |
Anthony PERARD | 51d7a9e | 2012-10-03 13:49:05 +0000 | [diff] [blame] | 3355 | } |
Paolo Bonzini | e87f777 | 2015-03-25 15:21:39 +0100 | [diff] [blame] | 3356 | if (dirty_log_mask & (1 << DIRTY_MEMORY_CODE)) { |
Paolo Bonzini | 5aa1ef7 | 2017-07-03 17:50:40 +0200 | [diff] [blame] | 3357 | assert(tcg_enabled()); |
Alex Bennée | ba051fb | 2016-10-27 16:10:16 +0100 | [diff] [blame] | 3358 | tb_lock(); |
Paolo Bonzini | e87f777 | 2015-03-25 15:21:39 +0100 | [diff] [blame] | 3359 | tb_invalidate_phys_range(addr, addr + length); |
Alex Bennée | ba051fb | 2016-10-27 16:10:16 +0100 | [diff] [blame] | 3360 | tb_unlock(); |
Paolo Bonzini | e87f777 | 2015-03-25 15:21:39 +0100 | [diff] [blame] | 3361 | dirty_log_mask &= ~(1 << DIRTY_MEMORY_CODE); |
| 3362 | } |
| 3363 | cpu_physical_memory_set_dirty_range(addr, length, dirty_log_mask); |
Anthony PERARD | 51d7a9e | 2012-10-03 13:49:05 +0000 | [diff] [blame] | 3364 | } |
| 3365 | |
Richard Henderson | 2332616 | 2013-07-08 14:55:59 -0700 | [diff] [blame] | 3366 | static int memory_access_size(MemoryRegion *mr, unsigned l, hwaddr addr) |
Paolo Bonzini | 82f2563 | 2013-05-24 11:59:43 +0200 | [diff] [blame] | 3367 | { |
Paolo Bonzini | e1622f4 | 2013-07-17 13:17:41 +0200 | [diff] [blame] | 3368 | unsigned access_size_max = mr->ops->valid.max_access_size; |
Richard Henderson | 2332616 | 2013-07-08 14:55:59 -0700 | [diff] [blame] | 3369 | |
| 3370 | /* Regions are assumed to support 1-4 byte accesses unless |
| 3371 | otherwise specified. */ |
Richard Henderson | 2332616 | 2013-07-08 14:55:59 -0700 | [diff] [blame] | 3372 | if (access_size_max == 0) { |
| 3373 | access_size_max = 4; |
Paolo Bonzini | 82f2563 | 2013-05-24 11:59:43 +0200 | [diff] [blame] | 3374 | } |
Richard Henderson | 2332616 | 2013-07-08 14:55:59 -0700 | [diff] [blame] | 3375 | |
| 3376 | /* Bound the maximum access by the alignment of the address. */ |
| 3377 | if (!mr->ops->impl.unaligned) { |
| 3378 | unsigned align_size_max = addr & -addr; |
| 3379 | if (align_size_max != 0 && align_size_max < access_size_max) { |
| 3380 | access_size_max = align_size_max; |
| 3381 | } |
| 3382 | } |
| 3383 | |
| 3384 | /* Don't attempt accesses larger than the maximum. */ |
| 3385 | if (l > access_size_max) { |
| 3386 | l = access_size_max; |
| 3387 | } |
Peter Maydell | 6554f5c | 2015-07-24 13:33:10 +0100 | [diff] [blame] | 3388 | l = pow2floor(l); |
Richard Henderson | 2332616 | 2013-07-08 14:55:59 -0700 | [diff] [blame] | 3389 | |
| 3390 | return l; |
Paolo Bonzini | 82f2563 | 2013-05-24 11:59:43 +0200 | [diff] [blame] | 3391 | } |
| 3392 | |
Jan Kiszka | 4840f10 | 2015-06-18 18:47:22 +0200 | [diff] [blame] | 3393 | static bool prepare_mmio_access(MemoryRegion *mr) |
Paolo Bonzini | 125b380 | 2015-06-18 18:47:21 +0200 | [diff] [blame] | 3394 | { |
Jan Kiszka | 4840f10 | 2015-06-18 18:47:22 +0200 | [diff] [blame] | 3395 | bool unlocked = !qemu_mutex_iothread_locked(); |
| 3396 | bool release_lock = false; |
| 3397 | |
| 3398 | if (unlocked && mr->global_locking) { |
| 3399 | qemu_mutex_lock_iothread(); |
| 3400 | unlocked = false; |
| 3401 | release_lock = true; |
Paolo Bonzini | 125b380 | 2015-06-18 18:47:21 +0200 | [diff] [blame] | 3402 | } |
Jan Kiszka | 4840f10 | 2015-06-18 18:47:22 +0200 | [diff] [blame] | 3403 | if (mr->flush_coalesced_mmio) { |
| 3404 | if (unlocked) { |
| 3405 | qemu_mutex_lock_iothread(); |
| 3406 | } |
| 3407 | qemu_flush_coalesced_mmio_buffer(); |
| 3408 | if (unlocked) { |
| 3409 | qemu_mutex_unlock_iothread(); |
| 3410 | } |
| 3411 | } |
| 3412 | |
| 3413 | return release_lock; |
Paolo Bonzini | 125b380 | 2015-06-18 18:47:21 +0200 | [diff] [blame] | 3414 | } |
| 3415 | |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 3416 | /* Called within RCU critical section. */ |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3417 | static MemTxResult flatview_write_continue(FlatView *fv, hwaddr addr, |
| 3418 | MemTxAttrs attrs, |
| 3419 | const uint8_t *buf, |
| 3420 | int len, hwaddr addr1, |
| 3421 | hwaddr l, MemoryRegion *mr) |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3422 | { |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3423 | uint8_t *ptr; |
Paolo Bonzini | 791af8c | 2013-05-24 16:10:39 +0200 | [diff] [blame] | 3424 | uint64_t val; |
Peter Maydell | 3b64349 | 2015-04-26 16:49:23 +0100 | [diff] [blame] | 3425 | MemTxResult result = MEMTX_OK; |
Jan Kiszka | 4840f10 | 2015-06-18 18:47:22 +0200 | [diff] [blame] | 3426 | bool release_lock = false; |
Lingfeng Yang | 4e37b73 | 2018-09-17 13:42:57 -0700 | [diff] [blame] | 3427 | uint32_t iters = 0; |
| 3428 | hwaddr first_addr = addr; |
| 3429 | MemoryRegion* first_mr = mr; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 3430 | |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 3431 | for (;;) { |
Lingfeng Yang | 4e37b73 | 2018-09-17 13:42:57 -0700 | [diff] [blame] | 3432 | ++iters; |
| 3433 | flatview_spin_warning( |
| 3434 | "flatview_write_continue", |
| 3435 | iters, |
| 3436 | first_addr, addr, |
| 3437 | first_mr, mr); |
| 3438 | |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 3439 | if (!memory_access_is_direct(mr, true)) { |
| 3440 | release_lock |= prepare_mmio_access(mr); |
| 3441 | l = memory_access_size(mr, l, addr1); |
| 3442 | /* XXX: could force current_cpu to NULL to avoid |
| 3443 | potential bugs */ |
| 3444 | switch (l) { |
| 3445 | case 8: |
| 3446 | /* 64 bit write access */ |
| 3447 | val = ldq_p(buf); |
| 3448 | result |= memory_region_dispatch_write(mr, addr1, val, 8, |
| 3449 | attrs); |
| 3450 | break; |
| 3451 | case 4: |
| 3452 | /* 32 bit write access */ |
Ladi Prosek | 6da67de | 2017-01-26 15:22:37 +0100 | [diff] [blame] | 3453 | val = (uint32_t)ldl_p(buf); |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 3454 | result |= memory_region_dispatch_write(mr, addr1, val, 4, |
| 3455 | attrs); |
| 3456 | break; |
| 3457 | case 2: |
| 3458 | /* 16 bit write access */ |
| 3459 | val = lduw_p(buf); |
| 3460 | result |= memory_region_dispatch_write(mr, addr1, val, 2, |
| 3461 | attrs); |
| 3462 | break; |
| 3463 | case 1: |
| 3464 | /* 8 bit write access */ |
| 3465 | val = ldub_p(buf); |
| 3466 | result |= memory_region_dispatch_write(mr, addr1, val, 1, |
| 3467 | attrs); |
| 3468 | break; |
| 3469 | default: |
| 3470 | abort(); |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3471 | } |
| 3472 | } else { |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 3473 | /* RAM case */ |
Anthony PERARD | f5aa69b | 2017-07-26 17:53:26 +0100 | [diff] [blame] | 3474 | ptr = qemu_ram_ptr_length(mr->ram_block, addr1, &l, false); |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 3475 | memcpy(ptr, buf, l); |
| 3476 | invalidate_and_set_dirty(mr, addr1, l); |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3477 | } |
Jan Kiszka | 4840f10 | 2015-06-18 18:47:22 +0200 | [diff] [blame] | 3478 | |
| 3479 | if (release_lock) { |
| 3480 | qemu_mutex_unlock_iothread(); |
| 3481 | release_lock = false; |
| 3482 | } |
| 3483 | |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3484 | len -= l; |
| 3485 | buf += l; |
| 3486 | addr += l; |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 3487 | |
| 3488 | if (!len) { |
| 3489 | break; |
| 3490 | } |
| 3491 | |
| 3492 | l = len; |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3493 | mr = flatview_translate(fv, addr, &addr1, &l, true); |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3494 | } |
Paolo Bonzini | fd8aaa7 | 2013-05-21 09:56:55 +0200 | [diff] [blame] | 3495 | |
Peter Maydell | 3b64349 | 2015-04-26 16:49:23 +0100 | [diff] [blame] | 3496 | return result; |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3497 | } |
bellard | 8df1cd0 | 2005-01-28 22:37:22 +0000 | [diff] [blame] | 3498 | |
Paolo Bonzini | 4c6ebbb | 2018-03-05 09:23:56 +0100 | [diff] [blame] | 3499 | /* Called from RCU critical section. */ |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3500 | static MemTxResult flatview_write(FlatView *fv, hwaddr addr, MemTxAttrs attrs, |
| 3501 | const uint8_t *buf, int len) |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 3502 | { |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 3503 | hwaddr l; |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 3504 | hwaddr addr1; |
| 3505 | MemoryRegion *mr; |
| 3506 | MemTxResult result = MEMTX_OK; |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 3507 | |
Paolo Bonzini | 4c6ebbb | 2018-03-05 09:23:56 +0100 | [diff] [blame] | 3508 | l = len; |
| 3509 | mr = flatview_translate(fv, addr, &addr1, &l, true); |
| 3510 | result = flatview_write_continue(fv, addr, attrs, buf, len, |
| 3511 | addr1, l, mr); |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 3512 | |
| 3513 | return result; |
| 3514 | } |
| 3515 | |
| 3516 | /* Called within RCU critical section. */ |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3517 | MemTxResult flatview_read_continue(FlatView *fv, hwaddr addr, |
| 3518 | MemTxAttrs attrs, uint8_t *buf, |
| 3519 | int len, hwaddr addr1, hwaddr l, |
| 3520 | MemoryRegion *mr) |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 3521 | { |
| 3522 | uint8_t *ptr; |
| 3523 | uint64_t val; |
| 3524 | MemTxResult result = MEMTX_OK; |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 3525 | bool release_lock = false; |
Lingfeng Yang | 4e37b73 | 2018-09-17 13:42:57 -0700 | [diff] [blame] | 3526 | uint32_t iters = 0; |
| 3527 | hwaddr first_addr = addr; |
| 3528 | MemoryRegion* first_mr = mr; |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 3529 | |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 3530 | for (;;) { |
Lingfeng Yang | 4e37b73 | 2018-09-17 13:42:57 -0700 | [diff] [blame] | 3531 | ++iters; |
| 3532 | flatview_spin_warning( |
| 3533 | "flatview_read_continue", |
| 3534 | iters, |
| 3535 | first_addr, addr, |
| 3536 | first_mr, mr); |
| 3537 | |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 3538 | if (!memory_access_is_direct(mr, false)) { |
| 3539 | /* I/O case */ |
| 3540 | release_lock |= prepare_mmio_access(mr); |
| 3541 | l = memory_access_size(mr, l, addr1); |
| 3542 | switch (l) { |
| 3543 | case 8: |
| 3544 | /* 64 bit read access */ |
| 3545 | result |= memory_region_dispatch_read(mr, addr1, &val, 8, |
| 3546 | attrs); |
| 3547 | stq_p(buf, val); |
| 3548 | break; |
| 3549 | case 4: |
| 3550 | /* 32 bit read access */ |
| 3551 | result |= memory_region_dispatch_read(mr, addr1, &val, 4, |
| 3552 | attrs); |
| 3553 | stl_p(buf, val); |
| 3554 | break; |
| 3555 | case 2: |
| 3556 | /* 16 bit read access */ |
| 3557 | result |= memory_region_dispatch_read(mr, addr1, &val, 2, |
| 3558 | attrs); |
| 3559 | stw_p(buf, val); |
| 3560 | break; |
| 3561 | case 1: |
| 3562 | /* 8 bit read access */ |
| 3563 | result |= memory_region_dispatch_read(mr, addr1, &val, 1, |
| 3564 | attrs); |
| 3565 | stb_p(buf, val); |
| 3566 | break; |
| 3567 | default: |
| 3568 | abort(); |
| 3569 | } |
| 3570 | } else { |
| 3571 | /* RAM case */ |
Anthony PERARD | f5aa69b | 2017-07-26 17:53:26 +0100 | [diff] [blame] | 3572 | ptr = qemu_ram_ptr_length(mr->ram_block, addr1, &l, false); |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 3573 | memcpy(buf, ptr, l); |
| 3574 | } |
| 3575 | |
| 3576 | if (release_lock) { |
| 3577 | qemu_mutex_unlock_iothread(); |
| 3578 | release_lock = false; |
| 3579 | } |
| 3580 | |
| 3581 | len -= l; |
| 3582 | buf += l; |
| 3583 | addr += l; |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 3584 | |
| 3585 | if (!len) { |
| 3586 | break; |
| 3587 | } |
| 3588 | |
| 3589 | l = len; |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3590 | mr = flatview_translate(fv, addr, &addr1, &l, false); |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 3591 | } |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 3592 | |
| 3593 | return result; |
| 3594 | } |
| 3595 | |
Paolo Bonzini | b2a44fc | 2018-03-05 00:19:49 +0100 | [diff] [blame] | 3596 | /* Called from RCU critical section. */ |
| 3597 | static MemTxResult flatview_read(FlatView *fv, hwaddr addr, |
| 3598 | MemTxAttrs attrs, uint8_t *buf, int len) |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 3599 | { |
| 3600 | hwaddr l; |
| 3601 | hwaddr addr1; |
| 3602 | MemoryRegion *mr; |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 3603 | |
Paolo Bonzini | b2a44fc | 2018-03-05 00:19:49 +0100 | [diff] [blame] | 3604 | l = len; |
| 3605 | mr = flatview_translate(fv, addr, &addr1, &l, false); |
| 3606 | return flatview_read_continue(fv, addr, attrs, buf, len, |
| 3607 | addr1, l, mr); |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 3608 | } |
| 3609 | |
Paolo Bonzini | b2a44fc | 2018-03-05 00:19:49 +0100 | [diff] [blame] | 3610 | MemTxResult address_space_read_full(AddressSpace *as, hwaddr addr, |
| 3611 | MemTxAttrs attrs, uint8_t *buf, int len) |
| 3612 | { |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3613 | MemTxResult result = MEMTX_OK; |
Paolo Bonzini | b2a44fc | 2018-03-05 00:19:49 +0100 | [diff] [blame] | 3614 | FlatView *fv; |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 3615 | |
Edgar E. Iglesias | 2a22165 | 2013-12-13 16:28:52 +1000 | [diff] [blame] | 3616 | if (len > 0) { |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 3617 | rcu_read_lock(); |
Paolo Bonzini | b2a44fc | 2018-03-05 00:19:49 +0100 | [diff] [blame] | 3618 | fv = address_space_to_flatview(as); |
| 3619 | result = flatview_read(fv, addr, attrs, buf, len); |
| 3620 | rcu_read_unlock(); |
| 3621 | } |
| 3622 | |
| 3623 | return result; |
| 3624 | } |
| 3625 | |
Paolo Bonzini | 4c6ebbb | 2018-03-05 09:23:56 +0100 | [diff] [blame] | 3626 | MemTxResult address_space_write(AddressSpace *as, hwaddr addr, |
| 3627 | MemTxAttrs attrs, |
| 3628 | const uint8_t *buf, int len) |
| 3629 | { |
| 3630 | MemTxResult result = MEMTX_OK; |
| 3631 | FlatView *fv; |
| 3632 | |
| 3633 | if (len > 0) { |
| 3634 | rcu_read_lock(); |
| 3635 | fv = address_space_to_flatview(as); |
| 3636 | result = flatview_write(fv, addr, attrs, buf, len); |
Paolo Bonzini | 5c8a00c | 2013-05-29 12:42:00 +0200 | [diff] [blame] | 3637 | rcu_read_unlock(); |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3638 | } |
pbrook | 5579c7f | 2009-04-11 14:47:08 +0000 | [diff] [blame] | 3639 | |
Alexander Graf | 582b55a | 2013-12-11 14:17:44 +0100 | [diff] [blame] | 3640 | return result; |
| 3641 | } |
| 3642 | |
Paolo Bonzini | 845b621 | 2015-03-23 11:45:53 +0100 | [diff] [blame] | 3643 | MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, MemTxAttrs attrs, |
Alexander Graf | 582b55a | 2013-12-11 14:17:44 +0100 | [diff] [blame] | 3644 | uint8_t *buf, int len, bool is_write) |
| 3645 | { |
| 3646 | if (is_write) { |
Paolo Bonzini | db84fd97 | 2018-03-05 09:29:04 +0100 | [diff] [blame] | 3647 | return address_space_write(as, addr, attrs, buf, len); |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3648 | } else { |
Paolo Bonzini | db84fd97 | 2018-03-05 09:29:04 +0100 | [diff] [blame] | 3649 | return address_space_read_full(as, addr, attrs, buf, len); |
Alexander Graf | 582b55a | 2013-12-11 14:17:44 +0100 | [diff] [blame] | 3650 | } |
| 3651 | } |
| 3652 | |
| 3653 | void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf, |
| 3654 | int len, int is_write) |
| 3655 | { |
| 3656 | address_space_rw(&address_space_memory, addr, MEMTXATTRS_UNSPECIFIED, |
| 3657 | buf, len, is_write); |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3658 | } |
| 3659 | |
| 3660 | enum write_rom_type { |
| 3661 | WRITE_DATA, |
| 3662 | FLUSH_CACHE, |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 3663 | }; |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3664 | |
| 3665 | static inline void cpu_physical_memory_write_rom_internal(AddressSpace *as, |
Alexander Graf | 582b55a | 2013-12-11 14:17:44 +0100 | [diff] [blame] | 3666 | hwaddr addr, const uint8_t *buf, int len, enum write_rom_type type) |
Edgar E. Iglesias | 2a22165 | 2013-12-13 16:28:52 +1000 | [diff] [blame] | 3667 | { |
Alexander Graf | 582b55a | 2013-12-11 14:17:44 +0100 | [diff] [blame] | 3668 | hwaddr l; |
| 3669 | uint8_t *ptr; |
Edgar E. Iglesias | 2a22165 | 2013-12-13 16:28:52 +1000 | [diff] [blame] | 3670 | hwaddr addr1; |
Alexander Graf | 582b55a | 2013-12-11 14:17:44 +0100 | [diff] [blame] | 3671 | MemoryRegion *mr; |
| 3672 | |
| 3673 | rcu_read_lock(); |
| 3674 | while (len > 0) { |
| 3675 | l = len; |
| 3676 | mr = address_space_translate(as, addr, &addr1, &l, true); |
| 3677 | |
| 3678 | if (!(memory_region_is_ram(mr) || |
| 3679 | memory_region_is_romd(mr))) { |
| 3680 | l = memory_access_size(mr, l, addr1); |
| 3681 | } else { |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3682 | /* ROM/RAM case */ |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 3683 | ptr = qemu_map_ram_ptr(mr->ram_block, addr1); |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3684 | switch (type) { |
| 3685 | case WRITE_DATA: |
| 3686 | memcpy(ptr, buf, l); |
| 3687 | invalidate_and_set_dirty(mr, addr1, l); |
| 3688 | break; |
| 3689 | case FLUSH_CACHE: |
| 3690 | flush_icache_range((uintptr_t)ptr, (uintptr_t)ptr + l); |
| 3691 | break; |
| 3692 | } |
| 3693 | } |
| 3694 | len -= l; |
| 3695 | buf += l; |
| 3696 | addr += l; |
| 3697 | } |
| 3698 | rcu_read_unlock(); |
| 3699 | } |
| 3700 | |
Alexander Graf | 582b55a | 2013-12-11 14:17:44 +0100 | [diff] [blame] | 3701 | /* used for ROM loading : can write in RAM and ROM */ |
| 3702 | void cpu_physical_memory_write_rom(AddressSpace *as, hwaddr addr, |
| 3703 | const uint8_t *buf, int len) |
| 3704 | { |
| 3705 | cpu_physical_memory_write_rom_internal(as, addr, buf, len, WRITE_DATA); |
| 3706 | } |
| 3707 | |
| 3708 | void cpu_flush_icache_range(hwaddr start, int len) |
| 3709 | { |
| 3710 | /* |
| 3711 | * This function should do the same thing as an icache flush that was |
| 3712 | * triggered from within the guest. For TCG we are always cache coherent, |
| 3713 | * so there is no need to flush anything. For KVM / Xen we need to flush |
| 3714 | * the host's instruction cache at least. |
| 3715 | */ |
| 3716 | if (tcg_enabled()) { |
| 3717 | return; |
| 3718 | } |
| 3719 | |
Edgar E. Iglesias | 2a22165 | 2013-12-13 16:28:52 +1000 | [diff] [blame] | 3720 | cpu_physical_memory_write_rom_internal(&address_space_memory, |
| 3721 | start, NULL, len, FLUSH_CACHE); |
Alexander Graf | 582b55a | 2013-12-11 14:17:44 +0100 | [diff] [blame] | 3722 | } |
| 3723 | |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3724 | typedef struct { |
Paolo Bonzini | d3e7155 | 2013-06-28 17:33:29 +0200 | [diff] [blame] | 3725 | MemoryRegion *mr; |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3726 | void *buffer; |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 3727 | hwaddr addr; |
| 3728 | hwaddr len; |
Fam Zheng | c2cba0f | 2015-03-16 17:03:33 +0800 | [diff] [blame] | 3729 | bool in_use; |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3730 | } BounceBuffer; |
| 3731 | |
| 3732 | static BounceBuffer bounce; |
| 3733 | |
aliguori | ba223c2 | 2009-01-22 16:59:16 +0000 | [diff] [blame] | 3734 | typedef struct MapClient { |
Fam Zheng | e95205e | 2015-03-16 17:03:37 +0800 | [diff] [blame] | 3735 | QEMUBH *bh; |
Blue Swirl | 72cf2d4 | 2009-09-12 07:36:22 +0000 | [diff] [blame] | 3736 | QLIST_ENTRY(MapClient) link; |
aliguori | ba223c2 | 2009-01-22 16:59:16 +0000 | [diff] [blame] | 3737 | } MapClient; |
| 3738 | |
Fam Zheng | 38e047b | 2015-03-16 17:03:35 +0800 | [diff] [blame] | 3739 | QemuMutex map_client_list_lock; |
Blue Swirl | 72cf2d4 | 2009-09-12 07:36:22 +0000 | [diff] [blame] | 3740 | static QLIST_HEAD(map_client_list, MapClient) map_client_list |
| 3741 | = QLIST_HEAD_INITIALIZER(map_client_list); |
aliguori | ba223c2 | 2009-01-22 16:59:16 +0000 | [diff] [blame] | 3742 | |
Fam Zheng | e95205e | 2015-03-16 17:03:37 +0800 | [diff] [blame] | 3743 | static void cpu_unregister_map_client_do(MapClient *client) |
aliguori | ba223c2 | 2009-01-22 16:59:16 +0000 | [diff] [blame] | 3744 | { |
Blue Swirl | 72cf2d4 | 2009-09-12 07:36:22 +0000 | [diff] [blame] | 3745 | QLIST_REMOVE(client, link); |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 3746 | g_free(client); |
aliguori | ba223c2 | 2009-01-22 16:59:16 +0000 | [diff] [blame] | 3747 | } |
| 3748 | |
Fam Zheng | 33b6c2e | 2015-03-16 17:03:36 +0800 | [diff] [blame] | 3749 | static void cpu_notify_map_clients_locked(void) |
aliguori | ba223c2 | 2009-01-22 16:59:16 +0000 | [diff] [blame] | 3750 | { |
| 3751 | MapClient *client; |
| 3752 | |
Blue Swirl | 72cf2d4 | 2009-09-12 07:36:22 +0000 | [diff] [blame] | 3753 | while (!QLIST_EMPTY(&map_client_list)) { |
| 3754 | client = QLIST_FIRST(&map_client_list); |
Fam Zheng | e95205e | 2015-03-16 17:03:37 +0800 | [diff] [blame] | 3755 | qemu_bh_schedule(client->bh); |
| 3756 | cpu_unregister_map_client_do(client); |
aliguori | ba223c2 | 2009-01-22 16:59:16 +0000 | [diff] [blame] | 3757 | } |
| 3758 | } |
| 3759 | |
Fam Zheng | e95205e | 2015-03-16 17:03:37 +0800 | [diff] [blame] | 3760 | void cpu_register_map_client(QEMUBH *bh) |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3761 | { |
| 3762 | MapClient *client = g_malloc(sizeof(*client)); |
| 3763 | |
Fam Zheng | 38e047b | 2015-03-16 17:03:35 +0800 | [diff] [blame] | 3764 | qemu_mutex_lock(&map_client_list_lock); |
Fam Zheng | e95205e | 2015-03-16 17:03:37 +0800 | [diff] [blame] | 3765 | client->bh = bh; |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3766 | QLIST_INSERT_HEAD(&map_client_list, client, link); |
Fam Zheng | 33b6c2e | 2015-03-16 17:03:36 +0800 | [diff] [blame] | 3767 | if (!atomic_read(&bounce.in_use)) { |
| 3768 | cpu_notify_map_clients_locked(); |
| 3769 | } |
Fam Zheng | 38e047b | 2015-03-16 17:03:35 +0800 | [diff] [blame] | 3770 | qemu_mutex_unlock(&map_client_list_lock); |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3771 | } |
| 3772 | |
Fam Zheng | 38e047b | 2015-03-16 17:03:35 +0800 | [diff] [blame] | 3773 | void cpu_exec_init_all(void) |
| 3774 | { |
| 3775 | qemu_mutex_init(&ram_list.mutex); |
Peter Maydell | 20bccb8 | 2016-10-24 16:26:49 +0100 | [diff] [blame] | 3776 | /* The data structures we set up here depend on knowing the page size, |
| 3777 | * so no more changes can be made after this point. |
| 3778 | * In an ideal world, nothing we did before we had finished the |
| 3779 | * machine setup would care about the target page size, and we could |
| 3780 | * do this much later, rather than requiring board models to state |
| 3781 | * up front what their requirements are. |
| 3782 | */ |
| 3783 | finalize_target_page_bits(); |
Fam Zheng | 38e047b | 2015-03-16 17:03:35 +0800 | [diff] [blame] | 3784 | io_mem_init(); |
Paolo Bonzini | 680a478 | 2015-11-02 09:23:52 +0100 | [diff] [blame] | 3785 | memory_map_init(); |
Fam Zheng | 38e047b | 2015-03-16 17:03:35 +0800 | [diff] [blame] | 3786 | qemu_mutex_init(&map_client_list_lock); |
| 3787 | } |
| 3788 | |
Fam Zheng | e95205e | 2015-03-16 17:03:37 +0800 | [diff] [blame] | 3789 | void cpu_unregister_map_client(QEMUBH *bh) |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3790 | { |
Fam Zheng | e95205e | 2015-03-16 17:03:37 +0800 | [diff] [blame] | 3791 | MapClient *client; |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3792 | |
Fam Zheng | e95205e | 2015-03-16 17:03:37 +0800 | [diff] [blame] | 3793 | qemu_mutex_lock(&map_client_list_lock); |
| 3794 | QLIST_FOREACH(client, &map_client_list, link) { |
| 3795 | if (client->bh == bh) { |
| 3796 | cpu_unregister_map_client_do(client); |
| 3797 | break; |
| 3798 | } |
| 3799 | } |
| 3800 | qemu_mutex_unlock(&map_client_list_lock); |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3801 | } |
| 3802 | |
| 3803 | static void cpu_notify_map_clients(void) |
| 3804 | { |
Fam Zheng | 38e047b | 2015-03-16 17:03:35 +0800 | [diff] [blame] | 3805 | qemu_mutex_lock(&map_client_list_lock); |
Fam Zheng | 33b6c2e | 2015-03-16 17:03:36 +0800 | [diff] [blame] | 3806 | cpu_notify_map_clients_locked(); |
Fam Zheng | 38e047b | 2015-03-16 17:03:35 +0800 | [diff] [blame] | 3807 | qemu_mutex_unlock(&map_client_list_lock); |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3808 | } |
| 3809 | |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3810 | static bool flatview_access_valid(FlatView *fv, hwaddr addr, int len, |
| 3811 | bool is_write) |
Paolo Bonzini | 51644ab | 2013-04-11 15:40:59 +0200 | [diff] [blame] | 3812 | { |
Paolo Bonzini | 5c8a00c | 2013-05-29 12:42:00 +0200 | [diff] [blame] | 3813 | MemoryRegion *mr; |
Paolo Bonzini | 51644ab | 2013-04-11 15:40:59 +0200 | [diff] [blame] | 3814 | hwaddr l, xlat; |
| 3815 | |
| 3816 | while (len > 0) { |
| 3817 | l = len; |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3818 | mr = flatview_translate(fv, addr, &xlat, &l, is_write); |
Paolo Bonzini | 5c8a00c | 2013-05-29 12:42:00 +0200 | [diff] [blame] | 3819 | if (!memory_access_is_direct(mr, is_write)) { |
| 3820 | l = memory_access_size(mr, l, addr); |
| 3821 | if (!memory_region_access_valid(mr, xlat, l, is_write)) { |
Lingfeng Yang | 8761585 | 2018-09-15 16:51:02 -0700 | [diff] [blame] | 3822 | rcu_read_unlock(); |
Paolo Bonzini | 51644ab | 2013-04-11 15:40:59 +0200 | [diff] [blame] | 3823 | return false; |
| 3824 | } |
| 3825 | } |
| 3826 | |
| 3827 | len -= l; |
| 3828 | addr += l; |
| 3829 | } |
| 3830 | return true; |
| 3831 | } |
| 3832 | |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3833 | bool address_space_access_valid(AddressSpace *as, hwaddr addr, |
| 3834 | int len, bool is_write) |
| 3835 | { |
Paolo Bonzini | 11e732a | 2018-03-05 00:23:26 +0100 | [diff] [blame] | 3836 | FlatView *fv; |
| 3837 | bool result; |
| 3838 | |
| 3839 | rcu_read_lock(); |
| 3840 | fv = address_space_to_flatview(as); |
| 3841 | result = flatview_access_valid(fv, addr, len, is_write); |
| 3842 | rcu_read_unlock(); |
| 3843 | return result; |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3844 | } |
| 3845 | |
Paolo Bonzini | 715c31e | 2016-11-22 12:04:31 +0100 | [diff] [blame] | 3846 | static hwaddr |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3847 | flatview_extend_translation(FlatView *fv, hwaddr addr, |
| 3848 | hwaddr target_len, |
Paolo Bonzini | 715c31e | 2016-11-22 12:04:31 +0100 | [diff] [blame] | 3849 | MemoryRegion *mr, hwaddr base, hwaddr len, |
| 3850 | bool is_write) |
| 3851 | { |
| 3852 | hwaddr done = 0; |
| 3853 | hwaddr xlat; |
| 3854 | MemoryRegion *this_mr; |
| 3855 | |
| 3856 | for (;;) { |
| 3857 | target_len -= len; |
| 3858 | addr += len; |
| 3859 | done += len; |
| 3860 | if (target_len == 0) { |
| 3861 | return done; |
| 3862 | } |
| 3863 | |
| 3864 | len = target_len; |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3865 | this_mr = flatview_translate(fv, addr, &xlat, |
| 3866 | &len, is_write); |
Paolo Bonzini | 715c31e | 2016-11-22 12:04:31 +0100 | [diff] [blame] | 3867 | if (this_mr != mr || xlat != base + done) { |
| 3868 | return done; |
| 3869 | } |
| 3870 | } |
| 3871 | } |
| 3872 | |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3873 | /* Map a physical memory region into a host virtual address. |
| 3874 | * May map a subset of the requested range, given by and returned in *plen. |
| 3875 | * May return NULL if resources needed to perform the mapping are exhausted. |
| 3876 | * Use only for reads OR writes - not for read-modify-write operations. |
aliguori | ba223c2 | 2009-01-22 16:59:16 +0000 | [diff] [blame] | 3877 | * Use cpu_register_map_client() to know when retrying the map operation is |
| 3878 | * likely to succeed. |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3879 | */ |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 3880 | void *address_space_map(AddressSpace *as, |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 3881 | hwaddr addr, |
| 3882 | hwaddr *plen, |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 3883 | bool is_write) |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3884 | { |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 3885 | hwaddr len = *plen; |
Paolo Bonzini | 715c31e | 2016-11-22 12:04:31 +0100 | [diff] [blame] | 3886 | hwaddr l, xlat; |
| 3887 | MemoryRegion *mr; |
Paolo Bonzini | e81bcda | 2015-12-16 10:31:26 +0100 | [diff] [blame] | 3888 | void *ptr; |
Paolo Bonzini | ad0c60f | 2018-03-05 00:23:26 +0100 | [diff] [blame] | 3889 | FlatView *fv; |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3890 | |
Paolo Bonzini | e3127ae | 2013-06-28 17:29:27 +0200 | [diff] [blame] | 3891 | if (len == 0) { |
| 3892 | return NULL; |
| 3893 | } |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3894 | |
Paolo Bonzini | e3127ae | 2013-06-28 17:29:27 +0200 | [diff] [blame] | 3895 | l = len; |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 3896 | rcu_read_lock(); |
Paolo Bonzini | ad0c60f | 2018-03-05 00:23:26 +0100 | [diff] [blame] | 3897 | fv = address_space_to_flatview(as); |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3898 | mr = flatview_translate(fv, addr, &xlat, &l, is_write); |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 3899 | |
Paolo Bonzini | e3127ae | 2013-06-28 17:29:27 +0200 | [diff] [blame] | 3900 | if (!memory_access_is_direct(mr, is_write)) { |
Fam Zheng | c2cba0f | 2015-03-16 17:03:33 +0800 | [diff] [blame] | 3901 | if (atomic_xchg(&bounce.in_use, true)) { |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 3902 | rcu_read_unlock(); |
Paolo Bonzini | e3127ae | 2013-06-28 17:29:27 +0200 | [diff] [blame] | 3903 | return NULL; |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3904 | } |
Kevin Wolf | e85d9db | 2013-07-22 14:30:23 +0200 | [diff] [blame] | 3905 | /* Avoid unbounded allocations */ |
| 3906 | l = MIN(l, TARGET_PAGE_SIZE); |
| 3907 | bounce.buffer = qemu_memalign(TARGET_PAGE_SIZE, l); |
Paolo Bonzini | e3127ae | 2013-06-28 17:29:27 +0200 | [diff] [blame] | 3908 | bounce.addr = addr; |
| 3909 | bounce.len = l; |
Paolo Bonzini | d3e7155 | 2013-06-28 17:33:29 +0200 | [diff] [blame] | 3910 | |
| 3911 | memory_region_ref(mr); |
| 3912 | bounce.mr = mr; |
Paolo Bonzini | e3127ae | 2013-06-28 17:29:27 +0200 | [diff] [blame] | 3913 | if (!is_write) { |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3914 | flatview_read(fv, addr, MEMTXATTRS_UNSPECIFIED, |
Peter Maydell | 5c9eb02 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 3915 | bounce.buffer, l); |
Stefano Stabellini | 8ab934f | 2011-06-27 18:26:06 +0100 | [diff] [blame] | 3916 | } |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3917 | |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 3918 | rcu_read_unlock(); |
Paolo Bonzini | e3127ae | 2013-06-28 17:29:27 +0200 | [diff] [blame] | 3919 | *plen = l; |
| 3920 | return bounce.buffer; |
| 3921 | } |
| 3922 | |
Paolo Bonzini | e3127ae | 2013-06-28 17:29:27 +0200 | [diff] [blame] | 3923 | |
Paolo Bonzini | d3e7155 | 2013-06-28 17:33:29 +0200 | [diff] [blame] | 3924 | memory_region_ref(mr); |
Alexey Kardashevskiy | 1662068 | 2017-09-21 18:50:58 +1000 | [diff] [blame] | 3925 | *plen = flatview_extend_translation(fv, addr, len, mr, xlat, |
| 3926 | l, is_write); |
Anthony PERARD | f5aa69b | 2017-07-26 17:53:26 +0100 | [diff] [blame] | 3927 | ptr = qemu_ram_ptr_length(mr->ram_block, xlat, plen, true); |
Paolo Bonzini | e81bcda | 2015-12-16 10:31:26 +0100 | [diff] [blame] | 3928 | rcu_read_unlock(); |
| 3929 | |
| 3930 | return ptr; |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3931 | } |
| 3932 | |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 3933 | /* Unmaps a memory region previously mapped by address_space_map(). |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3934 | * Will also mark the memory as dirty if is_write == 1. access_len gives |
| 3935 | * the amount of memory that was actually read or written by the caller. |
| 3936 | */ |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 3937 | void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len, |
| 3938 | int is_write, hwaddr access_len) |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3939 | { |
| 3940 | if (buffer != bounce.buffer) { |
Paolo Bonzini | d3e7155 | 2013-06-28 17:33:29 +0200 | [diff] [blame] | 3941 | MemoryRegion *mr; |
Yurii Zubrytskyi | 74b14bf | 2016-10-27 14:09:14 -0700 | [diff] [blame] | 3942 | ram_addr_t addr1 = 0; |
Paolo Bonzini | d3e7155 | 2013-06-28 17:33:29 +0200 | [diff] [blame] | 3943 | |
Paolo Bonzini | 07bdaa4 | 2016-03-25 12:55:08 +0100 | [diff] [blame] | 3944 | mr = memory_region_from_host(buffer, &addr1); |
Paolo Bonzini | d3e7155 | 2013-06-28 17:33:29 +0200 | [diff] [blame] | 3945 | assert(mr != NULL); |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3946 | if (is_write) { |
Paolo Bonzini | 845b621 | 2015-03-23 11:45:53 +0100 | [diff] [blame] | 3947 | invalidate_and_set_dirty(mr, addr1, access_len); |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3948 | } |
Jan Kiszka | 868bb33 | 2011-06-21 22:59:09 +0200 | [diff] [blame] | 3949 | if (xen_enabled()) { |
Jan Kiszka | e41d7c6 | 2011-06-21 22:59:08 +0200 | [diff] [blame] | 3950 | xen_invalidate_map_cache_entry(buffer); |
Anthony PERARD | 050a0dd | 2010-09-16 13:57:49 +0100 | [diff] [blame] | 3951 | } |
Paolo Bonzini | d3e7155 | 2013-06-28 17:33:29 +0200 | [diff] [blame] | 3952 | memory_region_unref(mr); |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3953 | return; |
| 3954 | } |
| 3955 | if (is_write) { |
Peter Maydell | 5c9eb02 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 3956 | address_space_write(as, bounce.addr, MEMTXATTRS_UNSPECIFIED, |
| 3957 | bounce.buffer, access_len); |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3958 | } |
Herve Poussineau | f8a8324 | 2010-01-24 21:23:56 +0000 | [diff] [blame] | 3959 | qemu_vfree(bounce.buffer); |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3960 | bounce.buffer = NULL; |
Paolo Bonzini | d3e7155 | 2013-06-28 17:33:29 +0200 | [diff] [blame] | 3961 | memory_region_unref(bounce.mr); |
Fam Zheng | c2cba0f | 2015-03-16 17:03:33 +0800 | [diff] [blame] | 3962 | atomic_mb_set(&bounce.in_use, false); |
aliguori | ba223c2 | 2009-01-22 16:59:16 +0000 | [diff] [blame] | 3963 | cpu_notify_map_clients(); |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3964 | } |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3965 | |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 3966 | void *cpu_physical_memory_map(hwaddr addr, |
| 3967 | hwaddr *plen, |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 3968 | int is_write) |
| 3969 | { |
| 3970 | return address_space_map(&address_space_memory, addr, plen, is_write); |
| 3971 | } |
| 3972 | |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 3973 | void cpu_physical_memory_unmap(void *buffer, hwaddr len, |
| 3974 | int is_write, hwaddr access_len) |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 3975 | { |
| 3976 | return address_space_unmap(&address_space_memory, buffer, len, is_write, access_len); |
| 3977 | } |
| 3978 | |
Lingfeng Yang | aff5efd | 2019-02-04 11:30:42 -0800 | [diff] [blame] | 3979 | void *cpu_physical_memory_get_addr(hwaddr addr) { |
| 3980 | hwaddr len = 4096; |
| 3981 | void* hva = cpu_physical_memory_map(addr, &len, 1); |
| 3982 | cpu_physical_memory_unmap(hva, len, 1, len); |
| 3983 | return hva; |
| 3984 | } |
| 3985 | |
Paolo Bonzini | 0ce265f | 2016-11-22 11:34:02 +0100 | [diff] [blame] | 3986 | #define ARG1_DECL AddressSpace *as |
| 3987 | #define ARG1 as |
| 3988 | #define SUFFIX |
| 3989 | #define TRANSLATE(...) address_space_translate(as, __VA_ARGS__) |
| 3990 | #define IS_DIRECT(mr, is_write) memory_access_is_direct(mr, is_write) |
| 3991 | #define MAP_RAM(mr, ofs) qemu_map_ram_ptr((mr)->ram_block, ofs) |
| 3992 | #define INVALIDATE(mr, ofs, len) invalidate_and_set_dirty(mr, ofs, len) |
| 3993 | #define RCU_READ_LOCK(...) rcu_read_lock() |
| 3994 | #define RCU_READ_UNLOCK(...) rcu_read_unlock() |
| 3995 | #include "memory_ldst.inc.c" |
Alexander Graf | 1e78bcc | 2011-07-06 09:09:23 +0200 | [diff] [blame] | 3996 | |
Paolo Bonzini | 1f4e496 | 2016-11-22 12:04:52 +0100 | [diff] [blame] | 3997 | int64_t address_space_cache_init(MemoryRegionCache *cache, |
| 3998 | AddressSpace *as, |
| 3999 | hwaddr addr, |
| 4000 | hwaddr len, |
| 4001 | bool is_write) |
bellard | 8df1cd0 | 2005-01-28 22:37:22 +0000 | [diff] [blame] | 4002 | { |
Paolo Bonzini | 90c4fe5 | 2017-04-03 13:41:28 +0200 | [diff] [blame] | 4003 | cache->len = len; |
| 4004 | cache->as = as; |
| 4005 | cache->xlat = addr; |
| 4006 | return len; |
bellard | 84b7b8e | 2005-11-28 21:19:04 +0000 | [diff] [blame] | 4007 | } |
| 4008 | |
Paolo Bonzini | 1f4e496 | 2016-11-22 12:04:52 +0100 | [diff] [blame] | 4009 | void address_space_cache_invalidate(MemoryRegionCache *cache, |
| 4010 | hwaddr addr, |
| 4011 | hwaddr access_len) |
bellard | 84b7b8e | 2005-11-28 21:19:04 +0000 | [diff] [blame] | 4012 | { |
bellard | 84b7b8e | 2005-11-28 21:19:04 +0000 | [diff] [blame] | 4013 | } |
| 4014 | |
Paolo Bonzini | 1f4e496 | 2016-11-22 12:04:52 +0100 | [diff] [blame] | 4015 | void address_space_cache_destroy(MemoryRegionCache *cache) |
bellard | 84b7b8e | 2005-11-28 21:19:04 +0000 | [diff] [blame] | 4016 | { |
Paolo Bonzini | 90c4fe5 | 2017-04-03 13:41:28 +0200 | [diff] [blame] | 4017 | cache->as = NULL; |
bellard | aab3309 | 2005-10-30 20:48:42 +0000 | [diff] [blame] | 4018 | } |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 4019 | |
Paolo Bonzini | 1f4e496 | 2016-11-22 12:04:52 +0100 | [diff] [blame] | 4020 | #define ARG1_DECL MemoryRegionCache *cache |
| 4021 | #define ARG1 cache |
| 4022 | #define SUFFIX _cached |
Paolo Bonzini | 90c4fe5 | 2017-04-03 13:41:28 +0200 | [diff] [blame] | 4023 | #define TRANSLATE(addr, ...) \ |
| 4024 | address_space_translate(cache->as, cache->xlat + (addr), __VA_ARGS__) |
Paolo Bonzini | 1f4e496 | 2016-11-22 12:04:52 +0100 | [diff] [blame] | 4025 | #define IS_DIRECT(mr, is_write) true |
Paolo Bonzini | 90c4fe5 | 2017-04-03 13:41:28 +0200 | [diff] [blame] | 4026 | #define MAP_RAM(mr, ofs) qemu_map_ram_ptr((mr)->ram_block, ofs) |
| 4027 | #define INVALIDATE(mr, ofs, len) invalidate_and_set_dirty(mr, ofs, len) |
| 4028 | #define RCU_READ_LOCK() rcu_read_lock() |
| 4029 | #define RCU_READ_UNLOCK() rcu_read_unlock() |
Paolo Bonzini | 1f4e496 | 2016-11-22 12:04:52 +0100 | [diff] [blame] | 4030 | #include "memory_ldst.inc.c" |
bellard | 5493600 | 2003-05-13 00:25:15 +0000 | [diff] [blame] | 4031 | |
| 4032 | /* virtual memory access for debug (includes writing to ROM) */ |
Andreas Färber | f17ec44 | 2013-06-29 19:40:58 +0200 | [diff] [blame] | 4033 | int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr, |
bellard | 5493600 | 2003-05-13 00:25:15 +0000 | [diff] [blame] | 4034 | uint8_t *buf, int len, int is_write) |
| 4035 | { |
| 4036 | int l; |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 4037 | hwaddr phys_addr; |
bellard | 5493600 | 2003-05-13 00:25:15 +0000 | [diff] [blame] | 4038 | target_ulong page; |
| 4039 | |
Christian Borntraeger | 79ca7a1 | 2017-03-07 15:19:08 +0100 | [diff] [blame] | 4040 | cpu_synchronize_state(cpu); |
bellard | 5493600 | 2003-05-13 00:25:15 +0000 | [diff] [blame] | 4041 | while (len > 0) { |
Peter Maydell | 5232e4c | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 4042 | int asidx; |
| 4043 | MemTxAttrs attrs; |
| 4044 | |
bellard | 5493600 | 2003-05-13 00:25:15 +0000 | [diff] [blame] | 4045 | page = addr & TARGET_PAGE_MASK; |
Peter Maydell | 5232e4c | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 4046 | phys_addr = cpu_get_phys_page_attrs_debug(cpu, page, &attrs); |
| 4047 | asidx = cpu_asidx_from_attrs(cpu, attrs); |
bellard | 5493600 | 2003-05-13 00:25:15 +0000 | [diff] [blame] | 4048 | /* if no physical page mapped, return an error */ |
| 4049 | if (phys_addr == -1) |
| 4050 | return -1; |
| 4051 | l = (page + TARGET_PAGE_SIZE) - addr; |
| 4052 | if (l > len) |
| 4053 | l = len; |
| 4054 | phys_addr += (addr & ~TARGET_PAGE_MASK); |
Edgar E. Iglesias | 2e38847 | 2013-12-13 16:31:02 +1000 | [diff] [blame] | 4055 | if (is_write) { |
Peter Maydell | 5232e4c | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 4056 | cpu_physical_memory_write_rom(cpu->cpu_ases[asidx].as, |
| 4057 | phys_addr, buf, l); |
Edgar E. Iglesias | 2e38847 | 2013-12-13 16:31:02 +1000 | [diff] [blame] | 4058 | } else { |
Peter Maydell | 5232e4c | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 4059 | address_space_rw(cpu->cpu_ases[asidx].as, phys_addr, |
| 4060 | MEMTXATTRS_UNSPECIFIED, |
Peter Maydell | 5c9eb02 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 4061 | buf, l, 0); |
Edgar E. Iglesias | 2e38847 | 2013-12-13 16:31:02 +1000 | [diff] [blame] | 4062 | } |
bellard | 5493600 | 2003-05-13 00:25:15 +0000 | [diff] [blame] | 4063 | len -= l; |
| 4064 | buf += l; |
| 4065 | addr += l; |
| 4066 | } |
| 4067 | return 0; |
| 4068 | } |
Dr. David Alan Gilbert | 038629a | 2015-11-05 18:10:29 +0000 | [diff] [blame] | 4069 | |
| 4070 | /* |
| 4071 | * Allows code that needs to deal with migration bitmaps etc to still be built |
| 4072 | * target independent. |
| 4073 | */ |
Juan Quintela | 20afaed | 2017-03-21 09:09:14 +0100 | [diff] [blame] | 4074 | size_t qemu_target_page_size(void) |
Dr. David Alan Gilbert | 038629a | 2015-11-05 18:10:29 +0000 | [diff] [blame] | 4075 | { |
Juan Quintela | 20afaed | 2017-03-21 09:09:14 +0100 | [diff] [blame] | 4076 | return TARGET_PAGE_SIZE; |
Dr. David Alan Gilbert | 038629a | 2015-11-05 18:10:29 +0000 | [diff] [blame] | 4077 | } |
| 4078 | |
Juan Quintela | 46d702b | 2017-04-24 21:03:48 +0200 | [diff] [blame] | 4079 | int qemu_target_page_bits(void) |
Greg Kurz | 98ed8ec | 2014-06-24 19:26:29 +0200 | [diff] [blame] | 4080 | { |
| 4081 | return TARGET_PAGE_BITS; |
Blue Swirl | 8e4a424 | 2013-01-06 18:30:17 +0000 | [diff] [blame] | 4082 | } |
| 4083 | |
Juan Quintela | 46d702b | 2017-04-24 21:03:48 +0200 | [diff] [blame] | 4084 | int qemu_target_page_bits_min(void) |
| 4085 | { |
| 4086 | return TARGET_PAGE_BITS_MIN; |
| 4087 | } |
Blue Swirl | 8e4a424 | 2013-01-06 18:30:17 +0000 | [diff] [blame] | 4088 | #endif |
| 4089 | |
| 4090 | /* |
| 4091 | * A helper function for the _utterly broken_ virtio device model to find out if |
| 4092 | * it's running on a big endian machine. Don't do this at home kids! |
| 4093 | */ |
| 4094 | bool target_words_bigendian(void); |
| 4095 | bool target_words_bigendian(void) |
| 4096 | { |
| 4097 | #if defined(TARGET_WORDS_BIGENDIAN) |
| 4098 | return true; |
| 4099 | #else |
| 4100 | return false; |
| 4101 | #endif |
| 4102 | } |
| 4103 | |
Wen Congyang | 76f3553 | 2012-05-07 12:04:18 +0800 | [diff] [blame] | 4104 | #ifndef CONFIG_USER_ONLY |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 4105 | bool cpu_physical_memory_is_io(hwaddr phys_addr) |
Wen Congyang | 76f3553 | 2012-05-07 12:04:18 +0800 | [diff] [blame] | 4106 | { |
Paolo Bonzini | 5c8a00c | 2013-05-29 12:42:00 +0200 | [diff] [blame] | 4107 | MemoryRegion*mr; |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 4108 | hwaddr l = 1; |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 4109 | bool res; |
Wen Congyang | 76f3553 | 2012-05-07 12:04:18 +0800 | [diff] [blame] | 4110 | |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 4111 | rcu_read_lock(); |
Paolo Bonzini | 5c8a00c | 2013-05-29 12:42:00 +0200 | [diff] [blame] | 4112 | mr = address_space_translate(&address_space_memory, |
| 4113 | phys_addr, &phys_addr, &l, false); |
Wen Congyang | 76f3553 | 2012-05-07 12:04:18 +0800 | [diff] [blame] | 4114 | |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 4115 | res = !(memory_region_is_ram(mr) || memory_region_is_romd(mr)); |
| 4116 | rcu_read_unlock(); |
| 4117 | return res; |
Wen Congyang | 76f3553 | 2012-05-07 12:04:18 +0800 | [diff] [blame] | 4118 | } |
Michael R. Hines | bd2fa51 | 2013-06-25 21:35:34 -0400 | [diff] [blame] | 4119 | |
Dr. David Alan Gilbert | e380705 | 2015-05-21 13:24:13 +0100 | [diff] [blame] | 4120 | int qemu_ram_foreach_block(RAMBlockIterFunc func, void *opaque) |
Michael R. Hines | bd2fa51 | 2013-06-25 21:35:34 -0400 | [diff] [blame] | 4121 | { |
| 4122 | RAMBlock *block; |
Dr. David Alan Gilbert | e380705 | 2015-05-21 13:24:13 +0100 | [diff] [blame] | 4123 | int ret = 0; |
Michael R. Hines | bd2fa51 | 2013-06-25 21:35:34 -0400 | [diff] [blame] | 4124 | |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 4125 | rcu_read_lock(); |
Peter Xu | 99e1558 | 2017-05-12 12:17:39 +0800 | [diff] [blame] | 4126 | RAMBLOCK_FOREACH(block) { |
Dr. David Alan Gilbert | e380705 | 2015-05-21 13:24:13 +0100 | [diff] [blame] | 4127 | ret = func(block->idstr, block->host, block->offset, |
| 4128 | block->used_length, opaque); |
| 4129 | if (ret) { |
| 4130 | break; |
| 4131 | } |
Michael R. Hines | bd2fa51 | 2013-06-25 21:35:34 -0400 | [diff] [blame] | 4132 | } |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 4133 | rcu_read_unlock(); |
Dr. David Alan Gilbert | e380705 | 2015-05-21 13:24:13 +0100 | [diff] [blame] | 4134 | return ret; |
Michael R. Hines | bd2fa51 | 2013-06-25 21:35:34 -0400 | [diff] [blame] | 4135 | } |
Dr. David Alan Gilbert | d3a5038 | 2017-02-24 18:28:32 +0000 | [diff] [blame] | 4136 | |
Lingfeng Yang | 0709131 | 2018-08-13 12:48:29 -0700 | [diff] [blame] | 4137 | int qemu_ram_foreach_migrate_block_with_file_info(RAMBlockIterFuncWithFileInfo func, void *opaque) |
| 4138 | { |
| 4139 | RAMBlock *block; |
| 4140 | int ret = 0; |
| 4141 | |
| 4142 | rcu_read_lock(); |
| 4143 | RAMBLOCK_FOREACH(block) { |
| 4144 | ret = 0; |
| 4145 | |
| 4146 | if (block->migrate) { |
| 4147 | ret = func(block->idstr, block->host, block->offset, |
| 4148 | block->used_length, |
| 4149 | block->flags, |
| 4150 | block->path, |
| 4151 | block->mr->readonly, |
| 4152 | opaque); |
| 4153 | } |
| 4154 | |
| 4155 | if (ret) { |
| 4156 | break; |
| 4157 | } |
| 4158 | } |
| 4159 | rcu_read_unlock(); |
| 4160 | return ret; |
| 4161 | } |
| 4162 | |
Dr. David Alan Gilbert | d3a5038 | 2017-02-24 18:28:32 +0000 | [diff] [blame] | 4163 | /* |
| 4164 | * Unmap pages of memory from start to start+length such that |
| 4165 | * they a) read as 0, b) Trigger whatever fault mechanism |
| 4166 | * the OS provides for postcopy. |
| 4167 | * The pages must be unmapped by the end of the function. |
| 4168 | * Returns: 0 on success, none-0 on failure |
| 4169 | * |
| 4170 | */ |
| 4171 | int ram_block_discard_range(RAMBlock *rb, uint64_t start, size_t length) |
| 4172 | { |
| 4173 | int ret = -1; |
| 4174 | |
| 4175 | uint8_t *host_startaddr = rb->host + start; |
| 4176 | |
| 4177 | if ((uintptr_t)host_startaddr & (rb->page_size - 1)) { |
| 4178 | error_report("ram_block_discard_range: Unaligned start address: %p", |
| 4179 | host_startaddr); |
| 4180 | goto err; |
| 4181 | } |
| 4182 | |
| 4183 | if ((start + length) <= rb->used_length) { |
Dr. David Alan Gilbert | db144f7 | 2018-03-12 17:20:56 +0000 | [diff] [blame] | 4184 | bool need_madvise, need_fallocate; |
Dr. David Alan Gilbert | d3a5038 | 2017-02-24 18:28:32 +0000 | [diff] [blame] | 4185 | uint8_t *host_endaddr = host_startaddr + length; |
| 4186 | if ((uintptr_t)host_endaddr & (rb->page_size - 1)) { |
| 4187 | error_report("ram_block_discard_range: Unaligned end address: %p", |
| 4188 | host_endaddr); |
| 4189 | goto err; |
| 4190 | } |
| 4191 | |
| 4192 | errno = ENOTSUP; /* If we are missing MADVISE etc */ |
| 4193 | |
Dr. David Alan Gilbert | db144f7 | 2018-03-12 17:20:56 +0000 | [diff] [blame] | 4194 | /* The logic here is messy; |
| 4195 | * madvise DONTNEED fails for hugepages |
| 4196 | * fallocate works on hugepages and shmem |
| 4197 | */ |
| 4198 | need_madvise = (rb->page_size == qemu_host_page_size); |
| 4199 | need_fallocate = rb->fd != -1; |
| 4200 | if (need_fallocate) { |
| 4201 | /* For a file, this causes the area of the file to be zero'd |
| 4202 | * if read, and for hugetlbfs also causes it to be unmapped |
| 4203 | * so a userfault will trigger. |
Dr. David Alan Gilbert | e2fa71f | 2017-02-24 18:28:33 +0000 | [diff] [blame] | 4204 | */ |
| 4205 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE |
| 4206 | ret = fallocate(rb->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, |
| 4207 | start, length); |
Dr. David Alan Gilbert | db144f7 | 2018-03-12 17:20:56 +0000 | [diff] [blame] | 4208 | if (ret) { |
| 4209 | ret = -errno; |
| 4210 | error_report("ram_block_discard_range: Failed to fallocate " |
| 4211 | "%s:%" PRIx64 " +%zx (%d)", |
| 4212 | rb->idstr, start, length, ret); |
| 4213 | goto err; |
| 4214 | } |
| 4215 | #else |
| 4216 | ret = -ENOSYS; |
| 4217 | error_report("ram_block_discard_range: fallocate not available/file" |
Dr. David Alan Gilbert | d3a5038 | 2017-02-24 18:28:32 +0000 | [diff] [blame] | 4218 | "%s:%" PRIx64 " +%zx (%d)", |
| 4219 | rb->idstr, start, length, ret); |
Dr. David Alan Gilbert | db144f7 | 2018-03-12 17:20:56 +0000 | [diff] [blame] | 4220 | goto err; |
| 4221 | #endif |
Dr. David Alan Gilbert | d3a5038 | 2017-02-24 18:28:32 +0000 | [diff] [blame] | 4222 | } |
Dr. David Alan Gilbert | db144f7 | 2018-03-12 17:20:56 +0000 | [diff] [blame] | 4223 | if (need_madvise) { |
| 4224 | /* For normal RAM this causes it to be unmapped, |
| 4225 | * for shared memory it causes the local mapping to disappear |
| 4226 | * and to fall back on the file contents (which we just |
| 4227 | * fallocate'd away). |
| 4228 | */ |
| 4229 | #if defined(CONFIG_MADVISE) |
| 4230 | ret = madvise(host_startaddr, length, MADV_DONTNEED); |
| 4231 | if (ret) { |
| 4232 | ret = -errno; |
| 4233 | error_report("ram_block_discard_range: Failed to discard range " |
| 4234 | "%s:%" PRIx64 " +%zx (%d)", |
| 4235 | rb->idstr, start, length, ret); |
| 4236 | goto err; |
| 4237 | } |
| 4238 | #else |
| 4239 | ret = -ENOSYS; |
| 4240 | error_report("ram_block_discard_range: MADVISE not available" |
| 4241 | "%s:%" PRIx64 " +%zx (%d)", |
| 4242 | rb->idstr, start, length, ret); |
| 4243 | goto err; |
| 4244 | #endif |
| 4245 | } |
| 4246 | trace_ram_block_discard_range(rb->idstr, host_startaddr, length, |
| 4247 | need_madvise, need_fallocate, ret); |
Dr. David Alan Gilbert | d3a5038 | 2017-02-24 18:28:32 +0000 | [diff] [blame] | 4248 | } else { |
| 4249 | error_report("ram_block_discard_range: Overrun block '%s' (%" PRIu64 |
| 4250 | "/%zx/" RAM_ADDR_FMT")", |
| 4251 | rb->idstr, start, length, rb->used_length); |
| 4252 | } |
| 4253 | |
| 4254 | err: |
| 4255 | return ret; |
| 4256 | } |
| 4257 | |
Peter Maydell | ec3f8c9 | 2013-06-27 20:53:38 +0100 | [diff] [blame] | 4258 | #endif |
Yang Zhong | a0be0c5 | 2017-07-03 18:12:13 +0800 | [diff] [blame] | 4259 | |
| 4260 | void page_size_init(void) |
| 4261 | { |
| 4262 | /* NOTE: we can always suppose that qemu_host_page_size >= |
| 4263 | TARGET_PAGE_SIZE */ |
Yang Zhong | a0be0c5 | 2017-07-03 18:12:13 +0800 | [diff] [blame] | 4264 | if (qemu_host_page_size == 0) { |
| 4265 | qemu_host_page_size = qemu_real_host_page_size; |
| 4266 | } |
| 4267 | if (qemu_host_page_size < TARGET_PAGE_SIZE) { |
| 4268 | qemu_host_page_size = TARGET_PAGE_SIZE; |
| 4269 | } |
| 4270 | qemu_host_page_mask = -(intptr_t)qemu_host_page_size; |
| 4271 | } |
Alexey Kardashevskiy | 5e8fd94 | 2017-09-21 18:51:06 +1000 | [diff] [blame] | 4272 | |
| 4273 | #if !defined(CONFIG_USER_ONLY) |
| 4274 | |
| 4275 | static void mtree_print_phys_entries(fprintf_function mon, void *f, |
| 4276 | int start, int end, int skip, int ptr) |
| 4277 | { |
| 4278 | if (start == end - 1) { |
| 4279 | mon(f, "\t%3d ", start); |
| 4280 | } else { |
| 4281 | mon(f, "\t%3d..%-3d ", start, end - 1); |
| 4282 | } |
| 4283 | mon(f, " skip=%d ", skip); |
| 4284 | if (ptr == PHYS_MAP_NODE_NIL) { |
| 4285 | mon(f, " ptr=NIL"); |
| 4286 | } else if (!skip) { |
| 4287 | mon(f, " ptr=#%d", ptr); |
| 4288 | } else { |
| 4289 | mon(f, " ptr=[%d]", ptr); |
| 4290 | } |
| 4291 | mon(f, "\n"); |
| 4292 | } |
| 4293 | |
| 4294 | #define MR_SIZE(size) (int128_nz(size) ? (hwaddr)int128_get64( \ |
| 4295 | int128_sub((size), int128_one())) : 0) |
| 4296 | |
| 4297 | void mtree_print_dispatch(fprintf_function mon, void *f, |
| 4298 | AddressSpaceDispatch *d, MemoryRegion *root) |
| 4299 | { |
| 4300 | int i; |
| 4301 | |
| 4302 | mon(f, " Dispatch\n"); |
| 4303 | mon(f, " Physical sections\n"); |
| 4304 | |
| 4305 | for (i = 0; i < d->map.sections_nb; ++i) { |
| 4306 | MemoryRegionSection *s = d->map.sections + i; |
| 4307 | const char *names[] = { " [unassigned]", " [not dirty]", |
| 4308 | " [ROM]", " [watch]" }; |
| 4309 | |
| 4310 | mon(f, " #%d @" TARGET_FMT_plx ".." TARGET_FMT_plx " %s%s%s%s%s", |
| 4311 | i, |
| 4312 | s->offset_within_address_space, |
| 4313 | s->offset_within_address_space + MR_SIZE(s->mr->size), |
| 4314 | s->mr->name ? s->mr->name : "(noname)", |
| 4315 | i < ARRAY_SIZE(names) ? names[i] : "", |
| 4316 | s->mr == root ? " [ROOT]" : "", |
| 4317 | s == d->mru_section ? " [MRU]" : "", |
| 4318 | s->mr->is_iommu ? " [iommu]" : ""); |
| 4319 | |
| 4320 | if (s->mr->alias) { |
| 4321 | mon(f, " alias=%s", s->mr->alias->name ? |
| 4322 | s->mr->alias->name : "noname"); |
| 4323 | } |
| 4324 | mon(f, "\n"); |
| 4325 | } |
| 4326 | |
| 4327 | mon(f, " Nodes (%d bits per level, %d levels) ptr=[%d] skip=%d\n", |
| 4328 | P_L2_BITS, P_L2_LEVELS, d->phys_map.ptr, d->phys_map.skip); |
| 4329 | for (i = 0; i < d->map.nodes_nb; ++i) { |
| 4330 | int j, jprev; |
| 4331 | PhysPageEntry prev; |
| 4332 | Node *n = d->map.nodes + i; |
| 4333 | |
| 4334 | mon(f, " [%d]\n", i); |
| 4335 | |
| 4336 | for (j = 0, jprev = 0, prev = *n[0]; j < ARRAY_SIZE(*n); ++j) { |
| 4337 | PhysPageEntry *pe = *n + j; |
| 4338 | |
| 4339 | if (pe->ptr == prev.ptr && pe->skip == prev.skip) { |
| 4340 | continue; |
| 4341 | } |
| 4342 | |
| 4343 | mtree_print_phys_entries(mon, f, jprev, j, prev.skip, prev.ptr); |
| 4344 | |
| 4345 | jprev = j; |
| 4346 | prev = *pe; |
| 4347 | } |
| 4348 | |
| 4349 | if (jprev != ARRAY_SIZE(*n)) { |
| 4350 | mtree_print_phys_entries(mon, f, jprev, j, prev.skip, prev.ptr); |
| 4351 | } |
| 4352 | } |
| 4353 | } |
| 4354 | |
| 4355 | #endif |