aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 1 | /* |
| 2 | * QEMU KVM support |
| 3 | * |
| 4 | * Copyright IBM, Corp. 2008 |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 5 | * Red Hat, Inc. 2008 |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 6 | * |
| 7 | * Authors: |
| 8 | * Anthony Liguori <aliguori@us.ibm.com> |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 9 | * Glauber Costa <gcosta@redhat.com> |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 10 | * |
| 11 | * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| 12 | * See the COPYING file in the top-level directory. |
| 13 | * |
| 14 | */ |
| 15 | |
| 16 | #include <sys/types.h> |
| 17 | #include <sys/ioctl.h> |
| 18 | #include <sys/mman.h> |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 19 | #include <stdarg.h> |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 20 | |
| 21 | #include <linux/kvm.h> |
| 22 | |
| 23 | #include "qemu-common.h" |
| 24 | #include "sysemu.h" |
Jan Kiszka | d33a181 | 2009-05-02 00:29:37 +0200 | [diff] [blame] | 25 | #include "hw/hw.h" |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 26 | #include "gdbstub.h" |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 27 | #include "kvm.h" |
| 28 | |
aliguori | f65ed4c | 2008-12-09 20:09:57 +0000 | [diff] [blame] | 29 | /* KVM uses PAGE_SIZE in it's definition of COALESCED_MMIO_MAX */ |
| 30 | #define PAGE_SIZE TARGET_PAGE_SIZE |
| 31 | |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 32 | //#define DEBUG_KVM |
| 33 | |
| 34 | #ifdef DEBUG_KVM |
| 35 | #define dprintf(fmt, ...) \ |
| 36 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
| 37 | #else |
| 38 | #define dprintf(fmt, ...) \ |
| 39 | do { } while (0) |
| 40 | #endif |
| 41 | |
aliguori | 34fc643 | 2008-11-19 17:41:58 +0000 | [diff] [blame] | 42 | typedef struct KVMSlot |
| 43 | { |
| 44 | target_phys_addr_t start_addr; |
| 45 | ram_addr_t memory_size; |
| 46 | ram_addr_t phys_offset; |
| 47 | int slot; |
| 48 | int flags; |
| 49 | } KVMSlot; |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 50 | |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 51 | typedef struct kvm_dirty_log KVMDirtyLog; |
| 52 | |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 53 | int kvm_allowed = 0; |
| 54 | |
| 55 | struct KVMState |
| 56 | { |
| 57 | KVMSlot slots[32]; |
| 58 | int fd; |
| 59 | int vmfd; |
aliguori | f65ed4c | 2008-12-09 20:09:57 +0000 | [diff] [blame] | 60 | int coalesced_mmio; |
Jan Kiszka | e69917e | 2009-05-01 20:42:15 +0200 | [diff] [blame] | 61 | int broken_set_mem_region; |
Jan Kiszka | 4495d6a | 2009-05-01 20:52:46 +0200 | [diff] [blame] | 62 | int migration_log; |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 63 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
| 64 | struct kvm_sw_breakpoint_head kvm_sw_breakpoints; |
| 65 | #endif |
Glauber Costa | 6f725c1 | 2009-07-21 12:26:58 -0300 | [diff] [blame] | 66 | int irqchip_in_kernel; |
| 67 | int pit_in_kernel; |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 68 | }; |
| 69 | |
| 70 | static KVMState *kvm_state; |
| 71 | |
| 72 | static KVMSlot *kvm_alloc_slot(KVMState *s) |
| 73 | { |
| 74 | int i; |
| 75 | |
| 76 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
aliguori | 62d60e8 | 2008-11-18 15:41:18 +0000 | [diff] [blame] | 77 | /* KVM private memory slots */ |
| 78 | if (i >= 8 && i < 12) |
| 79 | continue; |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 80 | if (s->slots[i].memory_size == 0) |
| 81 | return &s->slots[i]; |
| 82 | } |
| 83 | |
aliguori | d3f8d37 | 2009-04-17 14:26:29 +0000 | [diff] [blame] | 84 | fprintf(stderr, "%s: no free slot available\n", __func__); |
| 85 | abort(); |
| 86 | } |
| 87 | |
| 88 | static KVMSlot *kvm_lookup_matching_slot(KVMState *s, |
| 89 | target_phys_addr_t start_addr, |
| 90 | target_phys_addr_t end_addr) |
| 91 | { |
| 92 | int i; |
| 93 | |
| 94 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
| 95 | KVMSlot *mem = &s->slots[i]; |
| 96 | |
| 97 | if (start_addr == mem->start_addr && |
| 98 | end_addr == mem->start_addr + mem->memory_size) { |
| 99 | return mem; |
| 100 | } |
| 101 | } |
| 102 | |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 103 | return NULL; |
| 104 | } |
| 105 | |
aliguori | 6152e2a | 2009-04-17 14:26:33 +0000 | [diff] [blame] | 106 | /* |
| 107 | * Find overlapping slot with lowest start address |
| 108 | */ |
| 109 | static KVMSlot *kvm_lookup_overlapping_slot(KVMState *s, |
| 110 | target_phys_addr_t start_addr, |
| 111 | target_phys_addr_t end_addr) |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 112 | { |
aliguori | 6152e2a | 2009-04-17 14:26:33 +0000 | [diff] [blame] | 113 | KVMSlot *found = NULL; |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 114 | int i; |
| 115 | |
| 116 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
| 117 | KVMSlot *mem = &s->slots[i]; |
| 118 | |
aliguori | 6152e2a | 2009-04-17 14:26:33 +0000 | [diff] [blame] | 119 | if (mem->memory_size == 0 || |
| 120 | (found && found->start_addr < mem->start_addr)) { |
| 121 | continue; |
| 122 | } |
| 123 | |
| 124 | if (end_addr > mem->start_addr && |
| 125 | start_addr < mem->start_addr + mem->memory_size) { |
| 126 | found = mem; |
| 127 | } |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 128 | } |
| 129 | |
aliguori | 6152e2a | 2009-04-17 14:26:33 +0000 | [diff] [blame] | 130 | return found; |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 131 | } |
| 132 | |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 133 | static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot) |
| 134 | { |
| 135 | struct kvm_userspace_memory_region mem; |
| 136 | |
| 137 | mem.slot = slot->slot; |
| 138 | mem.guest_phys_addr = slot->start_addr; |
| 139 | mem.memory_size = slot->memory_size; |
pbrook | 5579c7f | 2009-04-11 14:47:08 +0000 | [diff] [blame] | 140 | mem.userspace_addr = (unsigned long)qemu_get_ram_ptr(slot->phys_offset); |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 141 | mem.flags = slot->flags; |
Jan Kiszka | 4495d6a | 2009-05-01 20:52:46 +0200 | [diff] [blame] | 142 | if (s->migration_log) { |
| 143 | mem.flags |= KVM_MEM_LOG_DIRTY_PAGES; |
| 144 | } |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 145 | return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); |
| 146 | } |
| 147 | |
Jan Kiszka | 8d2ba1f | 2009-06-27 09:24:58 +0200 | [diff] [blame] | 148 | static void kvm_reset_vcpu(void *opaque) |
| 149 | { |
| 150 | CPUState *env = opaque; |
| 151 | |
| 152 | if (kvm_arch_put_registers(env)) { |
| 153 | fprintf(stderr, "Fatal: kvm vcpu reset failed\n"); |
| 154 | abort(); |
| 155 | } |
| 156 | } |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 157 | |
Glauber Costa | 6f725c1 | 2009-07-21 12:26:58 -0300 | [diff] [blame] | 158 | int kvm_irqchip_in_kernel(void) |
| 159 | { |
| 160 | return kvm_state->irqchip_in_kernel; |
| 161 | } |
| 162 | |
| 163 | int kvm_pit_in_kernel(void) |
| 164 | { |
| 165 | return kvm_state->pit_in_kernel; |
| 166 | } |
| 167 | |
| 168 | |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 169 | int kvm_init_vcpu(CPUState *env) |
| 170 | { |
| 171 | KVMState *s = kvm_state; |
| 172 | long mmap_size; |
| 173 | int ret; |
| 174 | |
| 175 | dprintf("kvm_init_vcpu\n"); |
| 176 | |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 177 | ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, env->cpu_index); |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 178 | if (ret < 0) { |
| 179 | dprintf("kvm_create_vcpu failed\n"); |
| 180 | goto err; |
| 181 | } |
| 182 | |
| 183 | env->kvm_fd = ret; |
| 184 | env->kvm_state = s; |
| 185 | |
| 186 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); |
| 187 | if (mmap_size < 0) { |
| 188 | dprintf("KVM_GET_VCPU_MMAP_SIZE failed\n"); |
| 189 | goto err; |
| 190 | } |
| 191 | |
| 192 | env->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, |
| 193 | env->kvm_fd, 0); |
| 194 | if (env->kvm_run == MAP_FAILED) { |
| 195 | ret = -errno; |
| 196 | dprintf("mmap'ing vcpu state failed\n"); |
| 197 | goto err; |
| 198 | } |
| 199 | |
| 200 | ret = kvm_arch_init_vcpu(env); |
Jan Kiszka | 8d2ba1f | 2009-06-27 09:24:58 +0200 | [diff] [blame] | 201 | if (ret == 0) { |
Jan Kiszka | a08d436 | 2009-06-27 09:25:07 +0200 | [diff] [blame] | 202 | qemu_register_reset(kvm_reset_vcpu, env); |
Jan Kiszka | 8d2ba1f | 2009-06-27 09:24:58 +0200 | [diff] [blame] | 203 | ret = kvm_arch_put_registers(env); |
| 204 | } |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 205 | err: |
| 206 | return ret; |
| 207 | } |
| 208 | |
Jan Kiszka | f8d926e | 2009-05-02 02:18:38 +0200 | [diff] [blame] | 209 | int kvm_put_mp_state(CPUState *env) |
| 210 | { |
| 211 | struct kvm_mp_state mp_state = { .mp_state = env->mp_state }; |
| 212 | |
| 213 | return kvm_vcpu_ioctl(env, KVM_SET_MP_STATE, &mp_state); |
| 214 | } |
| 215 | |
| 216 | int kvm_get_mp_state(CPUState *env) |
| 217 | { |
| 218 | struct kvm_mp_state mp_state; |
| 219 | int ret; |
| 220 | |
| 221 | ret = kvm_vcpu_ioctl(env, KVM_GET_MP_STATE, &mp_state); |
| 222 | if (ret < 0) { |
| 223 | return ret; |
| 224 | } |
| 225 | env->mp_state = mp_state.mp_state; |
| 226 | return 0; |
| 227 | } |
| 228 | |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 229 | /* |
| 230 | * dirty pages logging control |
| 231 | */ |
aliguori | d3f8d37 | 2009-04-17 14:26:29 +0000 | [diff] [blame] | 232 | static int kvm_dirty_pages_log_change(target_phys_addr_t phys_addr, |
Jan Kiszka | 4495d6a | 2009-05-01 20:52:46 +0200 | [diff] [blame] | 233 | ram_addr_t size, int flags, int mask) |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 234 | { |
| 235 | KVMState *s = kvm_state; |
aliguori | d3f8d37 | 2009-04-17 14:26:29 +0000 | [diff] [blame] | 236 | KVMSlot *mem = kvm_lookup_matching_slot(s, phys_addr, phys_addr + size); |
Jan Kiszka | 4495d6a | 2009-05-01 20:52:46 +0200 | [diff] [blame] | 237 | int old_flags; |
| 238 | |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 239 | if (mem == NULL) { |
aliguori | d3f8d37 | 2009-04-17 14:26:29 +0000 | [diff] [blame] | 240 | fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-" |
| 241 | TARGET_FMT_plx "\n", __func__, phys_addr, |
Alexander Graf | b80a55e | 2009-07-17 13:51:45 +0200 | [diff] [blame] | 242 | (target_phys_addr_t)(phys_addr + size - 1)); |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 243 | return -EINVAL; |
| 244 | } |
| 245 | |
Jan Kiszka | 4495d6a | 2009-05-01 20:52:46 +0200 | [diff] [blame] | 246 | old_flags = mem->flags; |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 247 | |
Jan Kiszka | 4495d6a | 2009-05-01 20:52:46 +0200 | [diff] [blame] | 248 | flags = (mem->flags & ~mask) | flags; |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 249 | mem->flags = flags; |
| 250 | |
Jan Kiszka | 4495d6a | 2009-05-01 20:52:46 +0200 | [diff] [blame] | 251 | /* If nothing changed effectively, no need to issue ioctl */ |
| 252 | if (s->migration_log) { |
| 253 | flags |= KVM_MEM_LOG_DIRTY_PAGES; |
| 254 | } |
| 255 | if (flags == old_flags) { |
| 256 | return 0; |
| 257 | } |
| 258 | |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 259 | return kvm_set_user_memory_region(s, mem); |
| 260 | } |
| 261 | |
aliguori | d3f8d37 | 2009-04-17 14:26:29 +0000 | [diff] [blame] | 262 | int kvm_log_start(target_phys_addr_t phys_addr, ram_addr_t size) |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 263 | { |
aliguori | d3f8d37 | 2009-04-17 14:26:29 +0000 | [diff] [blame] | 264 | return kvm_dirty_pages_log_change(phys_addr, size, |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 265 | KVM_MEM_LOG_DIRTY_PAGES, |
| 266 | KVM_MEM_LOG_DIRTY_PAGES); |
| 267 | } |
| 268 | |
aliguori | d3f8d37 | 2009-04-17 14:26:29 +0000 | [diff] [blame] | 269 | int kvm_log_stop(target_phys_addr_t phys_addr, ram_addr_t size) |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 270 | { |
aliguori | d3f8d37 | 2009-04-17 14:26:29 +0000 | [diff] [blame] | 271 | return kvm_dirty_pages_log_change(phys_addr, size, |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 272 | 0, |
| 273 | KVM_MEM_LOG_DIRTY_PAGES); |
| 274 | } |
| 275 | |
Jan Kiszka | 4495d6a | 2009-05-01 20:52:46 +0200 | [diff] [blame] | 276 | int kvm_set_migration_log(int enable) |
| 277 | { |
| 278 | KVMState *s = kvm_state; |
| 279 | KVMSlot *mem; |
| 280 | int i, err; |
| 281 | |
| 282 | s->migration_log = enable; |
| 283 | |
| 284 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
| 285 | mem = &s->slots[i]; |
| 286 | |
| 287 | if (!!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) == enable) { |
| 288 | continue; |
| 289 | } |
| 290 | err = kvm_set_user_memory_region(s, mem); |
| 291 | if (err) { |
| 292 | return err; |
| 293 | } |
| 294 | } |
| 295 | return 0; |
| 296 | } |
| 297 | |
Alexander Graf | 96c1606 | 2009-07-27 12:49:56 +0200 | [diff] [blame] | 298 | static int test_le_bit(unsigned long nr, unsigned char *addr) |
| 299 | { |
| 300 | return (addr[nr >> 3] >> (nr & 7)) & 1; |
| 301 | } |
| 302 | |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 303 | /** |
| 304 | * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space |
| 305 | * This function updates qemu's dirty bitmap using cpu_physical_memory_set_dirty(). |
| 306 | * This means all bits are set to dirty. |
| 307 | * |
aliguori | d3f8d37 | 2009-04-17 14:26:29 +0000 | [diff] [blame] | 308 | * @start_add: start of logged region. |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 309 | * @end_addr: end of logged region. |
| 310 | */ |
Jan Kiszka | 151f774 | 2009-05-01 20:52:47 +0200 | [diff] [blame] | 311 | int kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr, |
| 312 | target_phys_addr_t end_addr) |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 313 | { |
| 314 | KVMState *s = kvm_state; |
Jan Kiszka | 151f774 | 2009-05-01 20:52:47 +0200 | [diff] [blame] | 315 | unsigned long size, allocated_size = 0; |
| 316 | target_phys_addr_t phys_addr; |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 317 | ram_addr_t addr; |
Jan Kiszka | 151f774 | 2009-05-01 20:52:47 +0200 | [diff] [blame] | 318 | KVMDirtyLog d; |
| 319 | KVMSlot *mem; |
| 320 | int ret = 0; |
Alexander Graf | bd83677 | 2009-07-17 13:51:48 +0200 | [diff] [blame] | 321 | int r; |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 322 | |
Jan Kiszka | 151f774 | 2009-05-01 20:52:47 +0200 | [diff] [blame] | 323 | d.dirty_bitmap = NULL; |
| 324 | while (start_addr < end_addr) { |
| 325 | mem = kvm_lookup_overlapping_slot(s, start_addr, end_addr); |
| 326 | if (mem == NULL) { |
| 327 | break; |
| 328 | } |
| 329 | |
Alexander Graf | bd83677 | 2009-07-17 13:51:48 +0200 | [diff] [blame] | 330 | /* We didn't activate dirty logging? Don't care then. */ |
| 331 | if(!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES)) { |
| 332 | continue; |
| 333 | } |
| 334 | |
Jan Kiszka | 151f774 | 2009-05-01 20:52:47 +0200 | [diff] [blame] | 335 | size = ((mem->memory_size >> TARGET_PAGE_BITS) + 7) / 8; |
| 336 | if (!d.dirty_bitmap) { |
| 337 | d.dirty_bitmap = qemu_malloc(size); |
| 338 | } else if (size > allocated_size) { |
| 339 | d.dirty_bitmap = qemu_realloc(d.dirty_bitmap, size); |
| 340 | } |
| 341 | allocated_size = size; |
| 342 | memset(d.dirty_bitmap, 0, allocated_size); |
| 343 | |
| 344 | d.slot = mem->slot; |
| 345 | |
Alexander Graf | bd83677 | 2009-07-17 13:51:48 +0200 | [diff] [blame] | 346 | r = kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d); |
| 347 | if (r == -EINVAL) { |
Jan Kiszka | 151f774 | 2009-05-01 20:52:47 +0200 | [diff] [blame] | 348 | dprintf("ioctl failed %d\n", errno); |
| 349 | ret = -1; |
| 350 | break; |
| 351 | } |
| 352 | |
| 353 | for (phys_addr = mem->start_addr, addr = mem->phys_offset; |
| 354 | phys_addr < mem->start_addr + mem->memory_size; |
| 355 | phys_addr += TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) { |
Alexander Graf | 96c1606 | 2009-07-27 12:49:56 +0200 | [diff] [blame] | 356 | unsigned char *bitmap = (unsigned char *)d.dirty_bitmap; |
Jan Kiszka | 151f774 | 2009-05-01 20:52:47 +0200 | [diff] [blame] | 357 | unsigned nr = (phys_addr - mem->start_addr) >> TARGET_PAGE_BITS; |
Jan Kiszka | 151f774 | 2009-05-01 20:52:47 +0200 | [diff] [blame] | 358 | |
Alexander Graf | 96c1606 | 2009-07-27 12:49:56 +0200 | [diff] [blame] | 359 | if (test_le_bit(nr, bitmap)) { |
Jan Kiszka | 151f774 | 2009-05-01 20:52:47 +0200 | [diff] [blame] | 360 | cpu_physical_memory_set_dirty(addr); |
Alexander Graf | bd83677 | 2009-07-17 13:51:48 +0200 | [diff] [blame] | 361 | } else if (r < 0) { |
| 362 | /* When our KVM implementation doesn't know about dirty logging |
| 363 | * we can just assume it's always dirty and be fine. */ |
| 364 | cpu_physical_memory_set_dirty(addr); |
Jan Kiszka | 151f774 | 2009-05-01 20:52:47 +0200 | [diff] [blame] | 365 | } |
| 366 | } |
| 367 | start_addr = phys_addr; |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 368 | } |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 369 | qemu_free(d.dirty_bitmap); |
Jan Kiszka | 151f774 | 2009-05-01 20:52:47 +0200 | [diff] [blame] | 370 | |
| 371 | return ret; |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 372 | } |
| 373 | |
aliguori | f65ed4c | 2008-12-09 20:09:57 +0000 | [diff] [blame] | 374 | int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size) |
| 375 | { |
| 376 | int ret = -ENOSYS; |
| 377 | #ifdef KVM_CAP_COALESCED_MMIO |
| 378 | KVMState *s = kvm_state; |
| 379 | |
| 380 | if (s->coalesced_mmio) { |
| 381 | struct kvm_coalesced_mmio_zone zone; |
| 382 | |
| 383 | zone.addr = start; |
| 384 | zone.size = size; |
| 385 | |
| 386 | ret = kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); |
| 387 | } |
| 388 | #endif |
| 389 | |
| 390 | return ret; |
| 391 | } |
| 392 | |
| 393 | int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size) |
| 394 | { |
| 395 | int ret = -ENOSYS; |
| 396 | #ifdef KVM_CAP_COALESCED_MMIO |
| 397 | KVMState *s = kvm_state; |
| 398 | |
| 399 | if (s->coalesced_mmio) { |
| 400 | struct kvm_coalesced_mmio_zone zone; |
| 401 | |
| 402 | zone.addr = start; |
| 403 | zone.size = size; |
| 404 | |
| 405 | ret = kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); |
| 406 | } |
| 407 | #endif |
| 408 | |
| 409 | return ret; |
| 410 | } |
| 411 | |
Anthony Liguori | ad7b8b3 | 2009-05-08 15:33:24 -0500 | [diff] [blame] | 412 | int kvm_check_extension(KVMState *s, unsigned int extension) |
| 413 | { |
| 414 | int ret; |
| 415 | |
| 416 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); |
| 417 | if (ret < 0) { |
| 418 | ret = 0; |
| 419 | } |
| 420 | |
| 421 | return ret; |
| 422 | } |
| 423 | |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 424 | int kvm_init(int smp_cpus) |
| 425 | { |
Jan Kiszka | 168ccc1 | 2009-06-07 11:30:25 +0200 | [diff] [blame] | 426 | static const char upgrade_note[] = |
| 427 | "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" |
| 428 | "(see http://sourceforge.net/projects/kvm).\n"; |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 429 | KVMState *s; |
| 430 | int ret; |
| 431 | int i; |
| 432 | |
Mark McLoughlin | 9f8fd69 | 2009-05-12 12:43:19 +0100 | [diff] [blame] | 433 | if (smp_cpus > 1) { |
| 434 | fprintf(stderr, "No SMP KVM support, use '-smp 1'\n"); |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 435 | return -EINVAL; |
Mark McLoughlin | 9f8fd69 | 2009-05-12 12:43:19 +0100 | [diff] [blame] | 436 | } |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 437 | |
| 438 | s = qemu_mallocz(sizeof(KVMState)); |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 439 | |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 440 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
| 441 | TAILQ_INIT(&s->kvm_sw_breakpoints); |
| 442 | #endif |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 443 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) |
| 444 | s->slots[i].slot = i; |
| 445 | |
| 446 | s->vmfd = -1; |
| 447 | s->fd = open("/dev/kvm", O_RDWR); |
| 448 | if (s->fd == -1) { |
| 449 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); |
| 450 | ret = -errno; |
| 451 | goto err; |
| 452 | } |
| 453 | |
| 454 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); |
| 455 | if (ret < KVM_API_VERSION) { |
| 456 | if (ret > 0) |
| 457 | ret = -EINVAL; |
| 458 | fprintf(stderr, "kvm version too old\n"); |
| 459 | goto err; |
| 460 | } |
| 461 | |
| 462 | if (ret > KVM_API_VERSION) { |
| 463 | ret = -EINVAL; |
| 464 | fprintf(stderr, "kvm version not supported\n"); |
| 465 | goto err; |
| 466 | } |
| 467 | |
| 468 | s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0); |
| 469 | if (s->vmfd < 0) |
| 470 | goto err; |
| 471 | |
| 472 | /* initially, KVM allocated its own memory and we had to jump through |
| 473 | * hooks to make phys_ram_base point to this. Modern versions of KVM |
pbrook | 5579c7f | 2009-04-11 14:47:08 +0000 | [diff] [blame] | 474 | * just use a user allocated buffer so we can use regular pages |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 475 | * unmodified. Make sure we have a sufficiently modern version of KVM. |
| 476 | */ |
Anthony Liguori | ad7b8b3 | 2009-05-08 15:33:24 -0500 | [diff] [blame] | 477 | if (!kvm_check_extension(s, KVM_CAP_USER_MEMORY)) { |
| 478 | ret = -EINVAL; |
Jan Kiszka | 168ccc1 | 2009-06-07 11:30:25 +0200 | [diff] [blame] | 479 | fprintf(stderr, "kvm does not support KVM_CAP_USER_MEMORY\n%s", |
| 480 | upgrade_note); |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 481 | goto err; |
| 482 | } |
| 483 | |
aliguori | d85dc28 | 2008-12-09 19:59:09 +0000 | [diff] [blame] | 484 | /* There was a nasty bug in < kvm-80 that prevents memory slots from being |
| 485 | * destroyed properly. Since we rely on this capability, refuse to work |
| 486 | * with any kernel without this capability. */ |
Anthony Liguori | ad7b8b3 | 2009-05-08 15:33:24 -0500 | [diff] [blame] | 487 | if (!kvm_check_extension(s, KVM_CAP_DESTROY_MEMORY_REGION_WORKS)) { |
| 488 | ret = -EINVAL; |
aliguori | d85dc28 | 2008-12-09 19:59:09 +0000 | [diff] [blame] | 489 | |
| 490 | fprintf(stderr, |
Jan Kiszka | 168ccc1 | 2009-06-07 11:30:25 +0200 | [diff] [blame] | 491 | "KVM kernel module broken (DESTROY_MEMORY_REGION).\n%s", |
| 492 | upgrade_note); |
aliguori | d85dc28 | 2008-12-09 19:59:09 +0000 | [diff] [blame] | 493 | goto err; |
| 494 | } |
| 495 | |
aliguori | f65ed4c | 2008-12-09 20:09:57 +0000 | [diff] [blame] | 496 | #ifdef KVM_CAP_COALESCED_MMIO |
Anthony Liguori | ad7b8b3 | 2009-05-08 15:33:24 -0500 | [diff] [blame] | 497 | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
| 498 | #else |
| 499 | s->coalesced_mmio = 0; |
aliguori | f65ed4c | 2008-12-09 20:09:57 +0000 | [diff] [blame] | 500 | #endif |
| 501 | |
Jan Kiszka | e69917e | 2009-05-01 20:42:15 +0200 | [diff] [blame] | 502 | s->broken_set_mem_region = 1; |
| 503 | #ifdef KVM_CAP_JOIN_MEMORY_REGIONS_WORKS |
| 504 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS); |
| 505 | if (ret > 0) { |
| 506 | s->broken_set_mem_region = 0; |
| 507 | } |
| 508 | #endif |
| 509 | |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 510 | ret = kvm_arch_init(s, smp_cpus); |
| 511 | if (ret < 0) |
| 512 | goto err; |
| 513 | |
| 514 | kvm_state = s; |
| 515 | |
| 516 | return 0; |
| 517 | |
| 518 | err: |
| 519 | if (s) { |
| 520 | if (s->vmfd != -1) |
| 521 | close(s->vmfd); |
| 522 | if (s->fd != -1) |
| 523 | close(s->fd); |
| 524 | } |
| 525 | qemu_free(s); |
| 526 | |
| 527 | return ret; |
| 528 | } |
| 529 | |
| 530 | static int kvm_handle_io(CPUState *env, uint16_t port, void *data, |
| 531 | int direction, int size, uint32_t count) |
| 532 | { |
| 533 | int i; |
| 534 | uint8_t *ptr = data; |
| 535 | |
| 536 | for (i = 0; i < count; i++) { |
| 537 | if (direction == KVM_EXIT_IO_IN) { |
| 538 | switch (size) { |
| 539 | case 1: |
| 540 | stb_p(ptr, cpu_inb(env, port)); |
| 541 | break; |
| 542 | case 2: |
| 543 | stw_p(ptr, cpu_inw(env, port)); |
| 544 | break; |
| 545 | case 4: |
| 546 | stl_p(ptr, cpu_inl(env, port)); |
| 547 | break; |
| 548 | } |
| 549 | } else { |
| 550 | switch (size) { |
| 551 | case 1: |
| 552 | cpu_outb(env, port, ldub_p(ptr)); |
| 553 | break; |
| 554 | case 2: |
| 555 | cpu_outw(env, port, lduw_p(ptr)); |
| 556 | break; |
| 557 | case 4: |
| 558 | cpu_outl(env, port, ldl_p(ptr)); |
| 559 | break; |
| 560 | } |
| 561 | } |
| 562 | |
| 563 | ptr += size; |
| 564 | } |
| 565 | |
| 566 | return 1; |
| 567 | } |
| 568 | |
aliguori | f65ed4c | 2008-12-09 20:09:57 +0000 | [diff] [blame] | 569 | static void kvm_run_coalesced_mmio(CPUState *env, struct kvm_run *run) |
| 570 | { |
| 571 | #ifdef KVM_CAP_COALESCED_MMIO |
| 572 | KVMState *s = kvm_state; |
| 573 | if (s->coalesced_mmio) { |
| 574 | struct kvm_coalesced_mmio_ring *ring; |
| 575 | |
| 576 | ring = (void *)run + (s->coalesced_mmio * TARGET_PAGE_SIZE); |
| 577 | while (ring->first != ring->last) { |
| 578 | struct kvm_coalesced_mmio *ent; |
| 579 | |
| 580 | ent = &ring->coalesced_mmio[ring->first]; |
| 581 | |
| 582 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); |
| 583 | /* FIXME smp_wmb() */ |
| 584 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; |
| 585 | } |
| 586 | } |
| 587 | #endif |
| 588 | } |
| 589 | |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 590 | int kvm_cpu_exec(CPUState *env) |
| 591 | { |
| 592 | struct kvm_run *run = env->kvm_run; |
| 593 | int ret; |
| 594 | |
| 595 | dprintf("kvm_cpu_exec()\n"); |
| 596 | |
| 597 | do { |
aurel32 | be214e6 | 2009-03-06 21:48:00 +0000 | [diff] [blame] | 598 | if (env->exit_request) { |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 599 | dprintf("interrupt exit requested\n"); |
| 600 | ret = 0; |
| 601 | break; |
| 602 | } |
| 603 | |
Jan Kiszka | 8c14c17 | 2009-05-30 10:01:45 +0200 | [diff] [blame] | 604 | kvm_arch_pre_run(env, run); |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 605 | ret = kvm_vcpu_ioctl(env, KVM_RUN, 0); |
| 606 | kvm_arch_post_run(env, run); |
| 607 | |
| 608 | if (ret == -EINTR || ret == -EAGAIN) { |
| 609 | dprintf("io window exit\n"); |
| 610 | ret = 0; |
| 611 | break; |
| 612 | } |
| 613 | |
| 614 | if (ret < 0) { |
| 615 | dprintf("kvm run failed %s\n", strerror(-ret)); |
| 616 | abort(); |
| 617 | } |
| 618 | |
aliguori | f65ed4c | 2008-12-09 20:09:57 +0000 | [diff] [blame] | 619 | kvm_run_coalesced_mmio(env, run); |
| 620 | |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 621 | ret = 0; /* exit loop */ |
| 622 | switch (run->exit_reason) { |
| 623 | case KVM_EXIT_IO: |
| 624 | dprintf("handle_io\n"); |
| 625 | ret = kvm_handle_io(env, run->io.port, |
| 626 | (uint8_t *)run + run->io.data_offset, |
| 627 | run->io.direction, |
| 628 | run->io.size, |
| 629 | run->io.count); |
| 630 | break; |
| 631 | case KVM_EXIT_MMIO: |
| 632 | dprintf("handle_mmio\n"); |
| 633 | cpu_physical_memory_rw(run->mmio.phys_addr, |
| 634 | run->mmio.data, |
| 635 | run->mmio.len, |
| 636 | run->mmio.is_write); |
| 637 | ret = 1; |
| 638 | break; |
| 639 | case KVM_EXIT_IRQ_WINDOW_OPEN: |
| 640 | dprintf("irq_window_open\n"); |
| 641 | break; |
| 642 | case KVM_EXIT_SHUTDOWN: |
| 643 | dprintf("shutdown\n"); |
| 644 | qemu_system_reset_request(); |
| 645 | ret = 1; |
| 646 | break; |
| 647 | case KVM_EXIT_UNKNOWN: |
| 648 | dprintf("kvm_exit_unknown\n"); |
| 649 | break; |
| 650 | case KVM_EXIT_FAIL_ENTRY: |
| 651 | dprintf("kvm_exit_fail_entry\n"); |
| 652 | break; |
| 653 | case KVM_EXIT_EXCEPTION: |
| 654 | dprintf("kvm_exit_exception\n"); |
| 655 | break; |
| 656 | case KVM_EXIT_DEBUG: |
| 657 | dprintf("kvm_exit_debug\n"); |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 658 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
| 659 | if (kvm_arch_debug(&run->debug.arch)) { |
| 660 | gdb_set_stop_cpu(env); |
| 661 | vm_stop(EXCP_DEBUG); |
| 662 | env->exception_index = EXCP_DEBUG; |
| 663 | return 0; |
| 664 | } |
| 665 | /* re-enter, this exception was guest-internal */ |
| 666 | ret = 1; |
| 667 | #endif /* KVM_CAP_SET_GUEST_DEBUG */ |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 668 | break; |
| 669 | default: |
| 670 | dprintf("kvm_arch_handle_exit\n"); |
| 671 | ret = kvm_arch_handle_exit(env, run); |
| 672 | break; |
| 673 | } |
| 674 | } while (ret > 0); |
| 675 | |
aurel32 | be214e6 | 2009-03-06 21:48:00 +0000 | [diff] [blame] | 676 | if (env->exit_request) { |
| 677 | env->exit_request = 0; |
aliguori | becfc39 | 2008-11-10 15:55:14 +0000 | [diff] [blame] | 678 | env->exception_index = EXCP_INTERRUPT; |
| 679 | } |
| 680 | |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 681 | return ret; |
| 682 | } |
| 683 | |
| 684 | void kvm_set_phys_mem(target_phys_addr_t start_addr, |
| 685 | ram_addr_t size, |
| 686 | ram_addr_t phys_offset) |
| 687 | { |
| 688 | KVMState *s = kvm_state; |
| 689 | ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK; |
aliguori | 6152e2a | 2009-04-17 14:26:33 +0000 | [diff] [blame] | 690 | KVMSlot *mem, old; |
| 691 | int err; |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 692 | |
aliguori | d3f8d37 | 2009-04-17 14:26:29 +0000 | [diff] [blame] | 693 | if (start_addr & ~TARGET_PAGE_MASK) { |
Jan Kiszka | e6f4afe | 2009-04-30 10:17:39 +0200 | [diff] [blame] | 694 | if (flags >= IO_MEM_UNASSIGNED) { |
| 695 | if (!kvm_lookup_overlapping_slot(s, start_addr, |
| 696 | start_addr + size)) { |
| 697 | return; |
| 698 | } |
| 699 | fprintf(stderr, "Unaligned split of a KVM memory slot\n"); |
| 700 | } else { |
| 701 | fprintf(stderr, "Only page-aligned memory slots supported\n"); |
| 702 | } |
aliguori | d3f8d37 | 2009-04-17 14:26:29 +0000 | [diff] [blame] | 703 | abort(); |
| 704 | } |
| 705 | |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 706 | /* KVM does not support read-only slots */ |
| 707 | phys_offset &= ~IO_MEM_ROM; |
| 708 | |
aliguori | 6152e2a | 2009-04-17 14:26:33 +0000 | [diff] [blame] | 709 | while (1) { |
| 710 | mem = kvm_lookup_overlapping_slot(s, start_addr, start_addr + size); |
| 711 | if (!mem) { |
| 712 | break; |
| 713 | } |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 714 | |
aliguori | 6152e2a | 2009-04-17 14:26:33 +0000 | [diff] [blame] | 715 | if (flags < IO_MEM_UNASSIGNED && start_addr >= mem->start_addr && |
| 716 | (start_addr + size <= mem->start_addr + mem->memory_size) && |
| 717 | (phys_offset - start_addr == mem->phys_offset - mem->start_addr)) { |
| 718 | /* The new slot fits into the existing one and comes with |
| 719 | * identical parameters - nothing to be done. */ |
aliguori | 62d60e8 | 2008-11-18 15:41:18 +0000 | [diff] [blame] | 720 | return; |
aliguori | 6152e2a | 2009-04-17 14:26:33 +0000 | [diff] [blame] | 721 | } |
| 722 | |
| 723 | old = *mem; |
| 724 | |
| 725 | /* unregister the overlapping slot */ |
| 726 | mem->memory_size = 0; |
| 727 | err = kvm_set_user_memory_region(s, mem); |
| 728 | if (err) { |
| 729 | fprintf(stderr, "%s: error unregistering overlapping slot: %s\n", |
| 730 | __func__, strerror(-err)); |
aliguori | 62d60e8 | 2008-11-18 15:41:18 +0000 | [diff] [blame] | 731 | abort(); |
| 732 | } |
aliguori | 6152e2a | 2009-04-17 14:26:33 +0000 | [diff] [blame] | 733 | |
| 734 | /* Workaround for older KVM versions: we can't join slots, even not by |
| 735 | * unregistering the previous ones and then registering the larger |
| 736 | * slot. We have to maintain the existing fragmentation. Sigh. |
| 737 | * |
| 738 | * This workaround assumes that the new slot starts at the same |
| 739 | * address as the first existing one. If not or if some overlapping |
| 740 | * slot comes around later, we will fail (not seen in practice so far) |
| 741 | * - and actually require a recent KVM version. */ |
Jan Kiszka | e69917e | 2009-05-01 20:42:15 +0200 | [diff] [blame] | 742 | if (s->broken_set_mem_region && |
| 743 | old.start_addr == start_addr && old.memory_size < size && |
aliguori | 6152e2a | 2009-04-17 14:26:33 +0000 | [diff] [blame] | 744 | flags < IO_MEM_UNASSIGNED) { |
| 745 | mem = kvm_alloc_slot(s); |
| 746 | mem->memory_size = old.memory_size; |
| 747 | mem->start_addr = old.start_addr; |
| 748 | mem->phys_offset = old.phys_offset; |
| 749 | mem->flags = 0; |
| 750 | |
| 751 | err = kvm_set_user_memory_region(s, mem); |
| 752 | if (err) { |
| 753 | fprintf(stderr, "%s: error updating slot: %s\n", __func__, |
| 754 | strerror(-err)); |
| 755 | abort(); |
| 756 | } |
| 757 | |
| 758 | start_addr += old.memory_size; |
| 759 | phys_offset += old.memory_size; |
| 760 | size -= old.memory_size; |
| 761 | continue; |
| 762 | } |
| 763 | |
| 764 | /* register prefix slot */ |
| 765 | if (old.start_addr < start_addr) { |
| 766 | mem = kvm_alloc_slot(s); |
| 767 | mem->memory_size = start_addr - old.start_addr; |
| 768 | mem->start_addr = old.start_addr; |
| 769 | mem->phys_offset = old.phys_offset; |
| 770 | mem->flags = 0; |
| 771 | |
| 772 | err = kvm_set_user_memory_region(s, mem); |
| 773 | if (err) { |
| 774 | fprintf(stderr, "%s: error registering prefix slot: %s\n", |
| 775 | __func__, strerror(-err)); |
| 776 | abort(); |
| 777 | } |
| 778 | } |
| 779 | |
| 780 | /* register suffix slot */ |
| 781 | if (old.start_addr + old.memory_size > start_addr + size) { |
| 782 | ram_addr_t size_delta; |
| 783 | |
| 784 | mem = kvm_alloc_slot(s); |
| 785 | mem->start_addr = start_addr + size; |
| 786 | size_delta = mem->start_addr - old.start_addr; |
| 787 | mem->memory_size = old.memory_size - size_delta; |
| 788 | mem->phys_offset = old.phys_offset + size_delta; |
| 789 | mem->flags = 0; |
| 790 | |
| 791 | err = kvm_set_user_memory_region(s, mem); |
| 792 | if (err) { |
| 793 | fprintf(stderr, "%s: error registering suffix slot: %s\n", |
| 794 | __func__, strerror(-err)); |
| 795 | abort(); |
| 796 | } |
| 797 | } |
aliguori | 62d60e8 | 2008-11-18 15:41:18 +0000 | [diff] [blame] | 798 | } |
aliguori | 6152e2a | 2009-04-17 14:26:33 +0000 | [diff] [blame] | 799 | |
| 800 | /* in case the KVM bug workaround already "consumed" the new slot */ |
| 801 | if (!size) |
| 802 | return; |
| 803 | |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 804 | /* KVM does not need to know about this memory */ |
| 805 | if (flags >= IO_MEM_UNASSIGNED) |
| 806 | return; |
| 807 | |
| 808 | mem = kvm_alloc_slot(s); |
| 809 | mem->memory_size = size; |
aliguori | 34fc643 | 2008-11-19 17:41:58 +0000 | [diff] [blame] | 810 | mem->start_addr = start_addr; |
| 811 | mem->phys_offset = phys_offset; |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 812 | mem->flags = 0; |
| 813 | |
aliguori | 6152e2a | 2009-04-17 14:26:33 +0000 | [diff] [blame] | 814 | err = kvm_set_user_memory_region(s, mem); |
| 815 | if (err) { |
| 816 | fprintf(stderr, "%s: error registering slot: %s\n", __func__, |
| 817 | strerror(-err)); |
| 818 | abort(); |
| 819 | } |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 820 | } |
| 821 | |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 822 | int kvm_ioctl(KVMState *s, int type, ...) |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 823 | { |
| 824 | int ret; |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 825 | void *arg; |
| 826 | va_list ap; |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 827 | |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 828 | va_start(ap, type); |
| 829 | arg = va_arg(ap, void *); |
| 830 | va_end(ap); |
| 831 | |
| 832 | ret = ioctl(s->fd, type, arg); |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 833 | if (ret == -1) |
| 834 | ret = -errno; |
| 835 | |
| 836 | return ret; |
| 837 | } |
| 838 | |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 839 | int kvm_vm_ioctl(KVMState *s, int type, ...) |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 840 | { |
| 841 | int ret; |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 842 | void *arg; |
| 843 | va_list ap; |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 844 | |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 845 | va_start(ap, type); |
| 846 | arg = va_arg(ap, void *); |
| 847 | va_end(ap); |
| 848 | |
| 849 | ret = ioctl(s->vmfd, type, arg); |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 850 | if (ret == -1) |
| 851 | ret = -errno; |
| 852 | |
| 853 | return ret; |
| 854 | } |
| 855 | |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 856 | int kvm_vcpu_ioctl(CPUState *env, int type, ...) |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 857 | { |
| 858 | int ret; |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 859 | void *arg; |
| 860 | va_list ap; |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 861 | |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 862 | va_start(ap, type); |
| 863 | arg = va_arg(ap, void *); |
| 864 | va_end(ap); |
| 865 | |
| 866 | ret = ioctl(env->kvm_fd, type, arg); |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 867 | if (ret == -1) |
| 868 | ret = -errno; |
| 869 | |
| 870 | return ret; |
| 871 | } |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 872 | |
| 873 | int kvm_has_sync_mmu(void) |
| 874 | { |
aurel32 | a9c1152 | 2008-12-18 22:42:51 +0000 | [diff] [blame] | 875 | #ifdef KVM_CAP_SYNC_MMU |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 876 | KVMState *s = kvm_state; |
| 877 | |
Anthony Liguori | ad7b8b3 | 2009-05-08 15:33:24 -0500 | [diff] [blame] | 878 | return kvm_check_extension(s, KVM_CAP_SYNC_MMU); |
| 879 | #else |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 880 | return 0; |
Anthony Liguori | ad7b8b3 | 2009-05-08 15:33:24 -0500 | [diff] [blame] | 881 | #endif |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 882 | } |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 883 | |
Jan Kiszka | 6f0437e | 2009-04-26 18:03:40 +0200 | [diff] [blame] | 884 | void kvm_setup_guest_memory(void *start, size_t size) |
| 885 | { |
| 886 | if (!kvm_has_sync_mmu()) { |
| 887 | #ifdef MADV_DONTFORK |
| 888 | int ret = madvise(start, size, MADV_DONTFORK); |
| 889 | |
| 890 | if (ret) { |
| 891 | perror("madvice"); |
| 892 | exit(1); |
| 893 | } |
| 894 | #else |
| 895 | fprintf(stderr, |
| 896 | "Need MADV_DONTFORK in absence of synchronous KVM MMU\n"); |
| 897 | exit(1); |
| 898 | #endif |
| 899 | } |
| 900 | } |
| 901 | |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 902 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
Luiz Capitulino | fc5d642 | 2009-07-22 15:32:52 -0300 | [diff] [blame^] | 903 | static void on_vcpu(CPUState *env, void (*func)(void *data), void *data) |
| 904 | { |
| 905 | if (env == cpu_single_env) { |
| 906 | func(data); |
| 907 | return; |
| 908 | } |
| 909 | abort(); |
| 910 | } |
| 911 | |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 912 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env, |
| 913 | target_ulong pc) |
| 914 | { |
| 915 | struct kvm_sw_breakpoint *bp; |
| 916 | |
| 917 | TAILQ_FOREACH(bp, &env->kvm_state->kvm_sw_breakpoints, entry) { |
| 918 | if (bp->pc == pc) |
| 919 | return bp; |
| 920 | } |
| 921 | return NULL; |
| 922 | } |
| 923 | |
| 924 | int kvm_sw_breakpoints_active(CPUState *env) |
| 925 | { |
| 926 | return !TAILQ_EMPTY(&env->kvm_state->kvm_sw_breakpoints); |
| 927 | } |
| 928 | |
Glauber Costa | 452e475 | 2009-07-16 17:55:28 -0400 | [diff] [blame] | 929 | struct kvm_set_guest_debug_data { |
| 930 | struct kvm_guest_debug dbg; |
| 931 | CPUState *env; |
| 932 | int err; |
| 933 | }; |
| 934 | |
| 935 | static void kvm_invoke_set_guest_debug(void *data) |
| 936 | { |
| 937 | struct kvm_set_guest_debug_data *dbg_data = data; |
| 938 | dbg_data->err = kvm_vcpu_ioctl(dbg_data->env, KVM_SET_GUEST_DEBUG, &dbg_data->dbg); |
| 939 | } |
| 940 | |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 941 | int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) |
| 942 | { |
Glauber Costa | 452e475 | 2009-07-16 17:55:28 -0400 | [diff] [blame] | 943 | struct kvm_set_guest_debug_data data; |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 944 | |
Glauber Costa | 452e475 | 2009-07-16 17:55:28 -0400 | [diff] [blame] | 945 | data.dbg.control = 0; |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 946 | if (env->singlestep_enabled) |
Glauber Costa | 452e475 | 2009-07-16 17:55:28 -0400 | [diff] [blame] | 947 | data.dbg.control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 948 | |
Glauber Costa | 452e475 | 2009-07-16 17:55:28 -0400 | [diff] [blame] | 949 | kvm_arch_update_guest_debug(env, &data.dbg); |
| 950 | data.dbg.control |= reinject_trap; |
| 951 | data.env = env; |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 952 | |
Glauber Costa | 452e475 | 2009-07-16 17:55:28 -0400 | [diff] [blame] | 953 | on_vcpu(env, kvm_invoke_set_guest_debug, &data); |
| 954 | return data.err; |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 955 | } |
| 956 | |
| 957 | int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr, |
| 958 | target_ulong len, int type) |
| 959 | { |
| 960 | struct kvm_sw_breakpoint *bp; |
| 961 | CPUState *env; |
| 962 | int err; |
| 963 | |
| 964 | if (type == GDB_BREAKPOINT_SW) { |
| 965 | bp = kvm_find_sw_breakpoint(current_env, addr); |
| 966 | if (bp) { |
| 967 | bp->use_count++; |
| 968 | return 0; |
| 969 | } |
| 970 | |
| 971 | bp = qemu_malloc(sizeof(struct kvm_sw_breakpoint)); |
| 972 | if (!bp) |
| 973 | return -ENOMEM; |
| 974 | |
| 975 | bp->pc = addr; |
| 976 | bp->use_count = 1; |
| 977 | err = kvm_arch_insert_sw_breakpoint(current_env, bp); |
| 978 | if (err) { |
| 979 | free(bp); |
| 980 | return err; |
| 981 | } |
| 982 | |
| 983 | TAILQ_INSERT_HEAD(¤t_env->kvm_state->kvm_sw_breakpoints, |
| 984 | bp, entry); |
| 985 | } else { |
| 986 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); |
| 987 | if (err) |
| 988 | return err; |
| 989 | } |
| 990 | |
| 991 | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
| 992 | err = kvm_update_guest_debug(env, 0); |
| 993 | if (err) |
| 994 | return err; |
| 995 | } |
| 996 | return 0; |
| 997 | } |
| 998 | |
| 999 | int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr, |
| 1000 | target_ulong len, int type) |
| 1001 | { |
| 1002 | struct kvm_sw_breakpoint *bp; |
| 1003 | CPUState *env; |
| 1004 | int err; |
| 1005 | |
| 1006 | if (type == GDB_BREAKPOINT_SW) { |
| 1007 | bp = kvm_find_sw_breakpoint(current_env, addr); |
| 1008 | if (!bp) |
| 1009 | return -ENOENT; |
| 1010 | |
| 1011 | if (bp->use_count > 1) { |
| 1012 | bp->use_count--; |
| 1013 | return 0; |
| 1014 | } |
| 1015 | |
| 1016 | err = kvm_arch_remove_sw_breakpoint(current_env, bp); |
| 1017 | if (err) |
| 1018 | return err; |
| 1019 | |
| 1020 | TAILQ_REMOVE(¤t_env->kvm_state->kvm_sw_breakpoints, bp, entry); |
| 1021 | qemu_free(bp); |
| 1022 | } else { |
| 1023 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); |
| 1024 | if (err) |
| 1025 | return err; |
| 1026 | } |
| 1027 | |
| 1028 | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
| 1029 | err = kvm_update_guest_debug(env, 0); |
| 1030 | if (err) |
| 1031 | return err; |
| 1032 | } |
| 1033 | return 0; |
| 1034 | } |
| 1035 | |
| 1036 | void kvm_remove_all_breakpoints(CPUState *current_env) |
| 1037 | { |
| 1038 | struct kvm_sw_breakpoint *bp, *next; |
| 1039 | KVMState *s = current_env->kvm_state; |
| 1040 | CPUState *env; |
| 1041 | |
| 1042 | TAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
| 1043 | if (kvm_arch_remove_sw_breakpoint(current_env, bp) != 0) { |
| 1044 | /* Try harder to find a CPU that currently sees the breakpoint. */ |
| 1045 | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
| 1046 | if (kvm_arch_remove_sw_breakpoint(env, bp) == 0) |
| 1047 | break; |
| 1048 | } |
| 1049 | } |
| 1050 | } |
| 1051 | kvm_arch_remove_all_hw_breakpoints(); |
| 1052 | |
| 1053 | for (env = first_cpu; env != NULL; env = env->next_cpu) |
| 1054 | kvm_update_guest_debug(env, 0); |
| 1055 | } |
| 1056 | |
| 1057 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ |
| 1058 | |
| 1059 | int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) |
| 1060 | { |
| 1061 | return -EINVAL; |
| 1062 | } |
| 1063 | |
| 1064 | int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr, |
| 1065 | target_ulong len, int type) |
| 1066 | { |
| 1067 | return -EINVAL; |
| 1068 | } |
| 1069 | |
| 1070 | int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr, |
| 1071 | target_ulong len, int type) |
| 1072 | { |
| 1073 | return -EINVAL; |
| 1074 | } |
| 1075 | |
| 1076 | void kvm_remove_all_breakpoints(CPUState *current_env) |
| 1077 | { |
| 1078 | } |
| 1079 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ |