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" |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 25 | #include "gdbstub.h" |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 26 | #include "kvm.h" |
| 27 | |
aliguori | f65ed4c | 2008-12-09 20:09:57 +0000 | [diff] [blame] | 28 | /* KVM uses PAGE_SIZE in it's definition of COALESCED_MMIO_MAX */ |
| 29 | #define PAGE_SIZE TARGET_PAGE_SIZE |
| 30 | |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 31 | //#define DEBUG_KVM |
| 32 | |
| 33 | #ifdef DEBUG_KVM |
| 34 | #define dprintf(fmt, ...) \ |
| 35 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
| 36 | #else |
| 37 | #define dprintf(fmt, ...) \ |
| 38 | do { } while (0) |
| 39 | #endif |
| 40 | |
aliguori | 34fc643 | 2008-11-19 17:41:58 +0000 | [diff] [blame] | 41 | typedef struct KVMSlot |
| 42 | { |
| 43 | target_phys_addr_t start_addr; |
| 44 | ram_addr_t memory_size; |
| 45 | ram_addr_t phys_offset; |
| 46 | int slot; |
| 47 | int flags; |
| 48 | } KVMSlot; |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 49 | |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 50 | typedef struct kvm_dirty_log KVMDirtyLog; |
| 51 | |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 52 | int kvm_allowed = 0; |
| 53 | |
| 54 | struct KVMState |
| 55 | { |
| 56 | KVMSlot slots[32]; |
| 57 | int fd; |
| 58 | int vmfd; |
aliguori | f65ed4c | 2008-12-09 20:09:57 +0000 | [diff] [blame] | 59 | int coalesced_mmio; |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 60 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
| 61 | struct kvm_sw_breakpoint_head kvm_sw_breakpoints; |
| 62 | #endif |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 63 | }; |
| 64 | |
| 65 | static KVMState *kvm_state; |
| 66 | |
| 67 | static KVMSlot *kvm_alloc_slot(KVMState *s) |
| 68 | { |
| 69 | int i; |
| 70 | |
| 71 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
aliguori | 62d60e8 | 2008-11-18 15:41:18 +0000 | [diff] [blame] | 72 | /* KVM private memory slots */ |
| 73 | if (i >= 8 && i < 12) |
| 74 | continue; |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 75 | if (s->slots[i].memory_size == 0) |
| 76 | return &s->slots[i]; |
| 77 | } |
| 78 | |
| 79 | return NULL; |
| 80 | } |
| 81 | |
| 82 | static KVMSlot *kvm_lookup_slot(KVMState *s, target_phys_addr_t start_addr) |
| 83 | { |
| 84 | int i; |
| 85 | |
| 86 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
| 87 | KVMSlot *mem = &s->slots[i]; |
| 88 | |
aliguori | 34fc643 | 2008-11-19 17:41:58 +0000 | [diff] [blame] | 89 | if (start_addr >= mem->start_addr && |
| 90 | start_addr < (mem->start_addr + mem->memory_size)) |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 91 | return mem; |
| 92 | } |
| 93 | |
| 94 | return NULL; |
| 95 | } |
| 96 | |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 97 | static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot) |
| 98 | { |
| 99 | struct kvm_userspace_memory_region mem; |
| 100 | |
| 101 | mem.slot = slot->slot; |
| 102 | mem.guest_phys_addr = slot->start_addr; |
| 103 | mem.memory_size = slot->memory_size; |
pbrook | 5579c7f | 2009-04-11 14:47:08 +0000 | [diff] [blame^] | 104 | mem.userspace_addr = (unsigned long)qemu_get_ram_ptr(slot->phys_offset); |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 105 | mem.flags = slot->flags; |
| 106 | |
| 107 | return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); |
| 108 | } |
| 109 | |
| 110 | |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 111 | int kvm_init_vcpu(CPUState *env) |
| 112 | { |
| 113 | KVMState *s = kvm_state; |
| 114 | long mmap_size; |
| 115 | int ret; |
| 116 | |
| 117 | dprintf("kvm_init_vcpu\n"); |
| 118 | |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 119 | ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, env->cpu_index); |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 120 | if (ret < 0) { |
| 121 | dprintf("kvm_create_vcpu failed\n"); |
| 122 | goto err; |
| 123 | } |
| 124 | |
| 125 | env->kvm_fd = ret; |
| 126 | env->kvm_state = s; |
| 127 | |
| 128 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); |
| 129 | if (mmap_size < 0) { |
| 130 | dprintf("KVM_GET_VCPU_MMAP_SIZE failed\n"); |
| 131 | goto err; |
| 132 | } |
| 133 | |
| 134 | env->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, |
| 135 | env->kvm_fd, 0); |
| 136 | if (env->kvm_run == MAP_FAILED) { |
| 137 | ret = -errno; |
| 138 | dprintf("mmap'ing vcpu state failed\n"); |
| 139 | goto err; |
| 140 | } |
| 141 | |
| 142 | ret = kvm_arch_init_vcpu(env); |
| 143 | |
| 144 | err: |
| 145 | return ret; |
| 146 | } |
| 147 | |
aliguori | f5d6f51 | 2008-12-15 22:20:42 +0000 | [diff] [blame] | 148 | int kvm_sync_vcpus(void) |
| 149 | { |
| 150 | CPUState *env; |
| 151 | |
| 152 | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
| 153 | int ret; |
| 154 | |
| 155 | ret = kvm_arch_put_registers(env); |
| 156 | if (ret) |
| 157 | return ret; |
| 158 | } |
| 159 | |
| 160 | return 0; |
| 161 | } |
| 162 | |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 163 | /* |
| 164 | * dirty pages logging control |
| 165 | */ |
| 166 | static int kvm_dirty_pages_log_change(target_phys_addr_t phys_addr, target_phys_addr_t end_addr, |
| 167 | unsigned flags, |
| 168 | unsigned mask) |
| 169 | { |
| 170 | KVMState *s = kvm_state; |
| 171 | KVMSlot *mem = kvm_lookup_slot(s, phys_addr); |
| 172 | if (mem == NULL) { |
| 173 | dprintf("invalid parameters %llx-%llx\n", phys_addr, end_addr); |
| 174 | return -EINVAL; |
| 175 | } |
| 176 | |
| 177 | flags = (mem->flags & ~mask) | flags; |
| 178 | /* Nothing changed, no need to issue ioctl */ |
| 179 | if (flags == mem->flags) |
| 180 | return 0; |
| 181 | |
| 182 | mem->flags = flags; |
| 183 | |
| 184 | return kvm_set_user_memory_region(s, mem); |
| 185 | } |
| 186 | |
| 187 | int kvm_log_start(target_phys_addr_t phys_addr, target_phys_addr_t end_addr) |
| 188 | { |
| 189 | return kvm_dirty_pages_log_change(phys_addr, end_addr, |
| 190 | KVM_MEM_LOG_DIRTY_PAGES, |
| 191 | KVM_MEM_LOG_DIRTY_PAGES); |
| 192 | } |
| 193 | |
| 194 | int kvm_log_stop(target_phys_addr_t phys_addr, target_phys_addr_t end_addr) |
| 195 | { |
| 196 | return kvm_dirty_pages_log_change(phys_addr, end_addr, |
| 197 | 0, |
| 198 | KVM_MEM_LOG_DIRTY_PAGES); |
| 199 | } |
| 200 | |
| 201 | /** |
| 202 | * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space |
| 203 | * This function updates qemu's dirty bitmap using cpu_physical_memory_set_dirty(). |
| 204 | * This means all bits are set to dirty. |
| 205 | * |
| 206 | * @start_add: start of logged region. This is what we use to search the memslot |
| 207 | * @end_addr: end of logged region. |
| 208 | */ |
| 209 | void kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr, target_phys_addr_t end_addr) |
| 210 | { |
| 211 | KVMState *s = kvm_state; |
| 212 | KVMDirtyLog d; |
| 213 | KVMSlot *mem = kvm_lookup_slot(s, start_addr); |
| 214 | unsigned long alloc_size; |
| 215 | ram_addr_t addr; |
| 216 | target_phys_addr_t phys_addr = start_addr; |
| 217 | |
| 218 | dprintf("sync addr: %llx into %lx\n", start_addr, mem->phys_offset); |
| 219 | if (mem == NULL) { |
| 220 | fprintf(stderr, "BUG: %s: invalid parameters\n", __func__); |
| 221 | return; |
| 222 | } |
| 223 | |
| 224 | alloc_size = mem->memory_size >> TARGET_PAGE_BITS / sizeof(d.dirty_bitmap); |
| 225 | d.dirty_bitmap = qemu_mallocz(alloc_size); |
| 226 | |
aliguori | 5832d1f | 2008-11-24 19:36:26 +0000 | [diff] [blame] | 227 | d.slot = mem->slot; |
| 228 | dprintf("slot %d, phys_addr %llx, uaddr: %llx\n", |
| 229 | d.slot, mem->start_addr, mem->phys_offset); |
| 230 | |
| 231 | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { |
| 232 | dprintf("ioctl failed %d\n", errno); |
| 233 | goto out; |
| 234 | } |
| 235 | |
| 236 | phys_addr = start_addr; |
| 237 | for (addr = mem->phys_offset; phys_addr < end_addr; phys_addr+= TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) { |
| 238 | unsigned long *bitmap = (unsigned long *)d.dirty_bitmap; |
| 239 | unsigned nr = (phys_addr - start_addr) >> TARGET_PAGE_BITS; |
| 240 | unsigned word = nr / (sizeof(*bitmap) * 8); |
| 241 | unsigned bit = nr % (sizeof(*bitmap) * 8); |
| 242 | if ((bitmap[word] >> bit) & 1) |
| 243 | cpu_physical_memory_set_dirty(addr); |
| 244 | } |
| 245 | out: |
| 246 | qemu_free(d.dirty_bitmap); |
| 247 | } |
| 248 | |
aliguori | f65ed4c | 2008-12-09 20:09:57 +0000 | [diff] [blame] | 249 | int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size) |
| 250 | { |
| 251 | int ret = -ENOSYS; |
| 252 | #ifdef KVM_CAP_COALESCED_MMIO |
| 253 | KVMState *s = kvm_state; |
| 254 | |
| 255 | if (s->coalesced_mmio) { |
| 256 | struct kvm_coalesced_mmio_zone zone; |
| 257 | |
| 258 | zone.addr = start; |
| 259 | zone.size = size; |
| 260 | |
| 261 | ret = kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); |
| 262 | } |
| 263 | #endif |
| 264 | |
| 265 | return ret; |
| 266 | } |
| 267 | |
| 268 | int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size) |
| 269 | { |
| 270 | int ret = -ENOSYS; |
| 271 | #ifdef KVM_CAP_COALESCED_MMIO |
| 272 | KVMState *s = kvm_state; |
| 273 | |
| 274 | if (s->coalesced_mmio) { |
| 275 | struct kvm_coalesced_mmio_zone zone; |
| 276 | |
| 277 | zone.addr = start; |
| 278 | zone.size = size; |
| 279 | |
| 280 | ret = kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); |
| 281 | } |
| 282 | #endif |
| 283 | |
| 284 | return ret; |
| 285 | } |
| 286 | |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 287 | int kvm_init(int smp_cpus) |
| 288 | { |
| 289 | KVMState *s; |
| 290 | int ret; |
| 291 | int i; |
| 292 | |
| 293 | if (smp_cpus > 1) |
| 294 | return -EINVAL; |
| 295 | |
| 296 | s = qemu_mallocz(sizeof(KVMState)); |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 297 | |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 298 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
| 299 | TAILQ_INIT(&s->kvm_sw_breakpoints); |
| 300 | #endif |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 301 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) |
| 302 | s->slots[i].slot = i; |
| 303 | |
| 304 | s->vmfd = -1; |
| 305 | s->fd = open("/dev/kvm", O_RDWR); |
| 306 | if (s->fd == -1) { |
| 307 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); |
| 308 | ret = -errno; |
| 309 | goto err; |
| 310 | } |
| 311 | |
| 312 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); |
| 313 | if (ret < KVM_API_VERSION) { |
| 314 | if (ret > 0) |
| 315 | ret = -EINVAL; |
| 316 | fprintf(stderr, "kvm version too old\n"); |
| 317 | goto err; |
| 318 | } |
| 319 | |
| 320 | if (ret > KVM_API_VERSION) { |
| 321 | ret = -EINVAL; |
| 322 | fprintf(stderr, "kvm version not supported\n"); |
| 323 | goto err; |
| 324 | } |
| 325 | |
| 326 | s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0); |
| 327 | if (s->vmfd < 0) |
| 328 | goto err; |
| 329 | |
| 330 | /* initially, KVM allocated its own memory and we had to jump through |
| 331 | * hooks to make phys_ram_base point to this. Modern versions of KVM |
pbrook | 5579c7f | 2009-04-11 14:47:08 +0000 | [diff] [blame^] | 332 | * just use a user allocated buffer so we can use regular pages |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 333 | * unmodified. Make sure we have a sufficiently modern version of KVM. |
| 334 | */ |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 335 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, KVM_CAP_USER_MEMORY); |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 336 | if (ret <= 0) { |
| 337 | if (ret == 0) |
| 338 | ret = -EINVAL; |
| 339 | fprintf(stderr, "kvm does not support KVM_CAP_USER_MEMORY\n"); |
| 340 | goto err; |
| 341 | } |
| 342 | |
aliguori | d85dc28 | 2008-12-09 19:59:09 +0000 | [diff] [blame] | 343 | /* There was a nasty bug in < kvm-80 that prevents memory slots from being |
| 344 | * destroyed properly. Since we rely on this capability, refuse to work |
| 345 | * with any kernel without this capability. */ |
| 346 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, |
| 347 | KVM_CAP_DESTROY_MEMORY_REGION_WORKS); |
| 348 | if (ret <= 0) { |
| 349 | if (ret == 0) |
| 350 | ret = -EINVAL; |
| 351 | |
| 352 | fprintf(stderr, |
| 353 | "KVM kernel module broken (DESTROY_MEMORY_REGION)\n" |
| 354 | "Please upgrade to at least kvm-81.\n"); |
| 355 | goto err; |
| 356 | } |
| 357 | |
aliguori | f65ed4c | 2008-12-09 20:09:57 +0000 | [diff] [blame] | 358 | s->coalesced_mmio = 0; |
| 359 | #ifdef KVM_CAP_COALESCED_MMIO |
| 360 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, KVM_CAP_COALESCED_MMIO); |
| 361 | if (ret > 0) |
| 362 | s->coalesced_mmio = ret; |
| 363 | #endif |
| 364 | |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 365 | ret = kvm_arch_init(s, smp_cpus); |
| 366 | if (ret < 0) |
| 367 | goto err; |
| 368 | |
| 369 | kvm_state = s; |
| 370 | |
| 371 | return 0; |
| 372 | |
| 373 | err: |
| 374 | if (s) { |
| 375 | if (s->vmfd != -1) |
| 376 | close(s->vmfd); |
| 377 | if (s->fd != -1) |
| 378 | close(s->fd); |
| 379 | } |
| 380 | qemu_free(s); |
| 381 | |
| 382 | return ret; |
| 383 | } |
| 384 | |
| 385 | static int kvm_handle_io(CPUState *env, uint16_t port, void *data, |
| 386 | int direction, int size, uint32_t count) |
| 387 | { |
| 388 | int i; |
| 389 | uint8_t *ptr = data; |
| 390 | |
| 391 | for (i = 0; i < count; i++) { |
| 392 | if (direction == KVM_EXIT_IO_IN) { |
| 393 | switch (size) { |
| 394 | case 1: |
| 395 | stb_p(ptr, cpu_inb(env, port)); |
| 396 | break; |
| 397 | case 2: |
| 398 | stw_p(ptr, cpu_inw(env, port)); |
| 399 | break; |
| 400 | case 4: |
| 401 | stl_p(ptr, cpu_inl(env, port)); |
| 402 | break; |
| 403 | } |
| 404 | } else { |
| 405 | switch (size) { |
| 406 | case 1: |
| 407 | cpu_outb(env, port, ldub_p(ptr)); |
| 408 | break; |
| 409 | case 2: |
| 410 | cpu_outw(env, port, lduw_p(ptr)); |
| 411 | break; |
| 412 | case 4: |
| 413 | cpu_outl(env, port, ldl_p(ptr)); |
| 414 | break; |
| 415 | } |
| 416 | } |
| 417 | |
| 418 | ptr += size; |
| 419 | } |
| 420 | |
| 421 | return 1; |
| 422 | } |
| 423 | |
aliguori | f65ed4c | 2008-12-09 20:09:57 +0000 | [diff] [blame] | 424 | static void kvm_run_coalesced_mmio(CPUState *env, struct kvm_run *run) |
| 425 | { |
| 426 | #ifdef KVM_CAP_COALESCED_MMIO |
| 427 | KVMState *s = kvm_state; |
| 428 | if (s->coalesced_mmio) { |
| 429 | struct kvm_coalesced_mmio_ring *ring; |
| 430 | |
| 431 | ring = (void *)run + (s->coalesced_mmio * TARGET_PAGE_SIZE); |
| 432 | while (ring->first != ring->last) { |
| 433 | struct kvm_coalesced_mmio *ent; |
| 434 | |
| 435 | ent = &ring->coalesced_mmio[ring->first]; |
| 436 | |
| 437 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); |
| 438 | /* FIXME smp_wmb() */ |
| 439 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; |
| 440 | } |
| 441 | } |
| 442 | #endif |
| 443 | } |
| 444 | |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 445 | int kvm_cpu_exec(CPUState *env) |
| 446 | { |
| 447 | struct kvm_run *run = env->kvm_run; |
| 448 | int ret; |
| 449 | |
| 450 | dprintf("kvm_cpu_exec()\n"); |
| 451 | |
| 452 | do { |
| 453 | kvm_arch_pre_run(env, run); |
| 454 | |
aurel32 | be214e6 | 2009-03-06 21:48:00 +0000 | [diff] [blame] | 455 | if (env->exit_request) { |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 456 | dprintf("interrupt exit requested\n"); |
| 457 | ret = 0; |
| 458 | break; |
| 459 | } |
| 460 | |
| 461 | ret = kvm_vcpu_ioctl(env, KVM_RUN, 0); |
| 462 | kvm_arch_post_run(env, run); |
| 463 | |
| 464 | if (ret == -EINTR || ret == -EAGAIN) { |
| 465 | dprintf("io window exit\n"); |
| 466 | ret = 0; |
| 467 | break; |
| 468 | } |
| 469 | |
| 470 | if (ret < 0) { |
| 471 | dprintf("kvm run failed %s\n", strerror(-ret)); |
| 472 | abort(); |
| 473 | } |
| 474 | |
aliguori | f65ed4c | 2008-12-09 20:09:57 +0000 | [diff] [blame] | 475 | kvm_run_coalesced_mmio(env, run); |
| 476 | |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 477 | ret = 0; /* exit loop */ |
| 478 | switch (run->exit_reason) { |
| 479 | case KVM_EXIT_IO: |
| 480 | dprintf("handle_io\n"); |
| 481 | ret = kvm_handle_io(env, run->io.port, |
| 482 | (uint8_t *)run + run->io.data_offset, |
| 483 | run->io.direction, |
| 484 | run->io.size, |
| 485 | run->io.count); |
| 486 | break; |
| 487 | case KVM_EXIT_MMIO: |
| 488 | dprintf("handle_mmio\n"); |
| 489 | cpu_physical_memory_rw(run->mmio.phys_addr, |
| 490 | run->mmio.data, |
| 491 | run->mmio.len, |
| 492 | run->mmio.is_write); |
| 493 | ret = 1; |
| 494 | break; |
| 495 | case KVM_EXIT_IRQ_WINDOW_OPEN: |
| 496 | dprintf("irq_window_open\n"); |
| 497 | break; |
| 498 | case KVM_EXIT_SHUTDOWN: |
| 499 | dprintf("shutdown\n"); |
| 500 | qemu_system_reset_request(); |
| 501 | ret = 1; |
| 502 | break; |
| 503 | case KVM_EXIT_UNKNOWN: |
| 504 | dprintf("kvm_exit_unknown\n"); |
| 505 | break; |
| 506 | case KVM_EXIT_FAIL_ENTRY: |
| 507 | dprintf("kvm_exit_fail_entry\n"); |
| 508 | break; |
| 509 | case KVM_EXIT_EXCEPTION: |
| 510 | dprintf("kvm_exit_exception\n"); |
| 511 | break; |
| 512 | case KVM_EXIT_DEBUG: |
| 513 | dprintf("kvm_exit_debug\n"); |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 514 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
| 515 | if (kvm_arch_debug(&run->debug.arch)) { |
| 516 | gdb_set_stop_cpu(env); |
| 517 | vm_stop(EXCP_DEBUG); |
| 518 | env->exception_index = EXCP_DEBUG; |
| 519 | return 0; |
| 520 | } |
| 521 | /* re-enter, this exception was guest-internal */ |
| 522 | ret = 1; |
| 523 | #endif /* KVM_CAP_SET_GUEST_DEBUG */ |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 524 | break; |
| 525 | default: |
| 526 | dprintf("kvm_arch_handle_exit\n"); |
| 527 | ret = kvm_arch_handle_exit(env, run); |
| 528 | break; |
| 529 | } |
| 530 | } while (ret > 0); |
| 531 | |
aurel32 | be214e6 | 2009-03-06 21:48:00 +0000 | [diff] [blame] | 532 | if (env->exit_request) { |
| 533 | env->exit_request = 0; |
aliguori | becfc39 | 2008-11-10 15:55:14 +0000 | [diff] [blame] | 534 | env->exception_index = EXCP_INTERRUPT; |
| 535 | } |
| 536 | |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 537 | return ret; |
| 538 | } |
| 539 | |
| 540 | void kvm_set_phys_mem(target_phys_addr_t start_addr, |
| 541 | ram_addr_t size, |
| 542 | ram_addr_t phys_offset) |
| 543 | { |
| 544 | KVMState *s = kvm_state; |
| 545 | ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK; |
| 546 | KVMSlot *mem; |
| 547 | |
| 548 | /* KVM does not support read-only slots */ |
| 549 | phys_offset &= ~IO_MEM_ROM; |
| 550 | |
| 551 | mem = kvm_lookup_slot(s, start_addr); |
| 552 | if (mem) { |
aliguori | a3d6841 | 2008-11-19 15:09:54 +0000 | [diff] [blame] | 553 | if ((flags == IO_MEM_UNASSIGNED) || (flags >= TLB_MMIO)) { |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 554 | mem->memory_size = 0; |
aliguori | 34fc643 | 2008-11-19 17:41:58 +0000 | [diff] [blame] | 555 | mem->start_addr = start_addr; |
| 556 | mem->phys_offset = 0; |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 557 | mem->flags = 0; |
| 558 | |
aliguori | 34fc643 | 2008-11-19 17:41:58 +0000 | [diff] [blame] | 559 | kvm_set_user_memory_region(s, mem); |
| 560 | } else if (start_addr >= mem->start_addr && |
| 561 | (start_addr + size) <= (mem->start_addr + |
aliguori | 62d60e8 | 2008-11-18 15:41:18 +0000 | [diff] [blame] | 562 | mem->memory_size)) { |
| 563 | KVMSlot slot; |
| 564 | target_phys_addr_t mem_start; |
| 565 | ram_addr_t mem_size, mem_offset; |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 566 | |
aliguori | 62d60e8 | 2008-11-18 15:41:18 +0000 | [diff] [blame] | 567 | /* Not splitting */ |
aliguori | 34fc643 | 2008-11-19 17:41:58 +0000 | [diff] [blame] | 568 | if ((phys_offset - (start_addr - mem->start_addr)) == |
| 569 | mem->phys_offset) |
aliguori | 62d60e8 | 2008-11-18 15:41:18 +0000 | [diff] [blame] | 570 | return; |
| 571 | |
| 572 | /* unregister whole slot */ |
| 573 | memcpy(&slot, mem, sizeof(slot)); |
| 574 | mem->memory_size = 0; |
aliguori | 34fc643 | 2008-11-19 17:41:58 +0000 | [diff] [blame] | 575 | kvm_set_user_memory_region(s, mem); |
aliguori | 62d60e8 | 2008-11-18 15:41:18 +0000 | [diff] [blame] | 576 | |
| 577 | /* register prefix slot */ |
aliguori | 34fc643 | 2008-11-19 17:41:58 +0000 | [diff] [blame] | 578 | mem_start = slot.start_addr; |
| 579 | mem_size = start_addr - slot.start_addr; |
| 580 | mem_offset = slot.phys_offset; |
aliguori | 62d60e8 | 2008-11-18 15:41:18 +0000 | [diff] [blame] | 581 | if (mem_size) |
| 582 | kvm_set_phys_mem(mem_start, mem_size, mem_offset); |
| 583 | |
| 584 | /* register new slot */ |
| 585 | kvm_set_phys_mem(start_addr, size, phys_offset); |
| 586 | |
| 587 | /* register suffix slot */ |
| 588 | mem_start = start_addr + size; |
| 589 | mem_offset += mem_size + size; |
| 590 | mem_size = slot.memory_size - mem_size - size; |
| 591 | if (mem_size) |
| 592 | kvm_set_phys_mem(mem_start, mem_size, mem_offset); |
| 593 | |
| 594 | return; |
| 595 | } else { |
| 596 | printf("Registering overlapping slot\n"); |
| 597 | abort(); |
| 598 | } |
| 599 | } |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 600 | /* KVM does not need to know about this memory */ |
| 601 | if (flags >= IO_MEM_UNASSIGNED) |
| 602 | return; |
| 603 | |
| 604 | mem = kvm_alloc_slot(s); |
| 605 | mem->memory_size = size; |
aliguori | 34fc643 | 2008-11-19 17:41:58 +0000 | [diff] [blame] | 606 | mem->start_addr = start_addr; |
| 607 | mem->phys_offset = phys_offset; |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 608 | mem->flags = 0; |
| 609 | |
aliguori | 34fc643 | 2008-11-19 17:41:58 +0000 | [diff] [blame] | 610 | kvm_set_user_memory_region(s, mem); |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 611 | /* FIXME deal with errors */ |
| 612 | } |
| 613 | |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 614 | int kvm_ioctl(KVMState *s, int type, ...) |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 615 | { |
| 616 | int ret; |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 617 | void *arg; |
| 618 | va_list ap; |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 619 | |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 620 | va_start(ap, type); |
| 621 | arg = va_arg(ap, void *); |
| 622 | va_end(ap); |
| 623 | |
| 624 | ret = ioctl(s->fd, type, arg); |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 625 | if (ret == -1) |
| 626 | ret = -errno; |
| 627 | |
| 628 | return ret; |
| 629 | } |
| 630 | |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 631 | int kvm_vm_ioctl(KVMState *s, int type, ...) |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 632 | { |
| 633 | int ret; |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 634 | void *arg; |
| 635 | va_list ap; |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 636 | |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 637 | va_start(ap, type); |
| 638 | arg = va_arg(ap, void *); |
| 639 | va_end(ap); |
| 640 | |
| 641 | ret = ioctl(s->vmfd, type, arg); |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 642 | if (ret == -1) |
| 643 | ret = -errno; |
| 644 | |
| 645 | return ret; |
| 646 | } |
| 647 | |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 648 | int kvm_vcpu_ioctl(CPUState *env, int type, ...) |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 649 | { |
| 650 | int ret; |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 651 | void *arg; |
| 652 | va_list ap; |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 653 | |
aliguori | 984b518 | 2008-11-13 19:21:00 +0000 | [diff] [blame] | 654 | va_start(ap, type); |
| 655 | arg = va_arg(ap, void *); |
| 656 | va_end(ap); |
| 657 | |
| 658 | ret = ioctl(env->kvm_fd, type, arg); |
aliguori | 0533044 | 2008-11-05 16:29:27 +0000 | [diff] [blame] | 659 | if (ret == -1) |
| 660 | ret = -errno; |
| 661 | |
| 662 | return ret; |
| 663 | } |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 664 | |
| 665 | int kvm_has_sync_mmu(void) |
| 666 | { |
aurel32 | a9c1152 | 2008-12-18 22:42:51 +0000 | [diff] [blame] | 667 | #ifdef KVM_CAP_SYNC_MMU |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 668 | KVMState *s = kvm_state; |
| 669 | |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 670 | if (kvm_ioctl(s, KVM_CHECK_EXTENSION, KVM_CAP_SYNC_MMU) > 0) |
| 671 | return 1; |
| 672 | #endif |
| 673 | |
| 674 | return 0; |
| 675 | } |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 676 | |
| 677 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
| 678 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env, |
| 679 | target_ulong pc) |
| 680 | { |
| 681 | struct kvm_sw_breakpoint *bp; |
| 682 | |
| 683 | TAILQ_FOREACH(bp, &env->kvm_state->kvm_sw_breakpoints, entry) { |
| 684 | if (bp->pc == pc) |
| 685 | return bp; |
| 686 | } |
| 687 | return NULL; |
| 688 | } |
| 689 | |
| 690 | int kvm_sw_breakpoints_active(CPUState *env) |
| 691 | { |
| 692 | return !TAILQ_EMPTY(&env->kvm_state->kvm_sw_breakpoints); |
| 693 | } |
| 694 | |
| 695 | int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) |
| 696 | { |
| 697 | struct kvm_guest_debug dbg; |
| 698 | |
| 699 | dbg.control = 0; |
| 700 | if (env->singlestep_enabled) |
| 701 | dbg.control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
| 702 | |
| 703 | kvm_arch_update_guest_debug(env, &dbg); |
| 704 | dbg.control |= reinject_trap; |
| 705 | |
| 706 | return kvm_vcpu_ioctl(env, KVM_SET_GUEST_DEBUG, &dbg); |
| 707 | } |
| 708 | |
| 709 | int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr, |
| 710 | target_ulong len, int type) |
| 711 | { |
| 712 | struct kvm_sw_breakpoint *bp; |
| 713 | CPUState *env; |
| 714 | int err; |
| 715 | |
| 716 | if (type == GDB_BREAKPOINT_SW) { |
| 717 | bp = kvm_find_sw_breakpoint(current_env, addr); |
| 718 | if (bp) { |
| 719 | bp->use_count++; |
| 720 | return 0; |
| 721 | } |
| 722 | |
| 723 | bp = qemu_malloc(sizeof(struct kvm_sw_breakpoint)); |
| 724 | if (!bp) |
| 725 | return -ENOMEM; |
| 726 | |
| 727 | bp->pc = addr; |
| 728 | bp->use_count = 1; |
| 729 | err = kvm_arch_insert_sw_breakpoint(current_env, bp); |
| 730 | if (err) { |
| 731 | free(bp); |
| 732 | return err; |
| 733 | } |
| 734 | |
| 735 | TAILQ_INSERT_HEAD(¤t_env->kvm_state->kvm_sw_breakpoints, |
| 736 | bp, entry); |
| 737 | } else { |
| 738 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); |
| 739 | if (err) |
| 740 | return err; |
| 741 | } |
| 742 | |
| 743 | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
| 744 | err = kvm_update_guest_debug(env, 0); |
| 745 | if (err) |
| 746 | return err; |
| 747 | } |
| 748 | return 0; |
| 749 | } |
| 750 | |
| 751 | int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr, |
| 752 | target_ulong len, int type) |
| 753 | { |
| 754 | struct kvm_sw_breakpoint *bp; |
| 755 | CPUState *env; |
| 756 | int err; |
| 757 | |
| 758 | if (type == GDB_BREAKPOINT_SW) { |
| 759 | bp = kvm_find_sw_breakpoint(current_env, addr); |
| 760 | if (!bp) |
| 761 | return -ENOENT; |
| 762 | |
| 763 | if (bp->use_count > 1) { |
| 764 | bp->use_count--; |
| 765 | return 0; |
| 766 | } |
| 767 | |
| 768 | err = kvm_arch_remove_sw_breakpoint(current_env, bp); |
| 769 | if (err) |
| 770 | return err; |
| 771 | |
| 772 | TAILQ_REMOVE(¤t_env->kvm_state->kvm_sw_breakpoints, bp, entry); |
| 773 | qemu_free(bp); |
| 774 | } else { |
| 775 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); |
| 776 | if (err) |
| 777 | return err; |
| 778 | } |
| 779 | |
| 780 | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
| 781 | err = kvm_update_guest_debug(env, 0); |
| 782 | if (err) |
| 783 | return err; |
| 784 | } |
| 785 | return 0; |
| 786 | } |
| 787 | |
| 788 | void kvm_remove_all_breakpoints(CPUState *current_env) |
| 789 | { |
| 790 | struct kvm_sw_breakpoint *bp, *next; |
| 791 | KVMState *s = current_env->kvm_state; |
| 792 | CPUState *env; |
| 793 | |
| 794 | TAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
| 795 | if (kvm_arch_remove_sw_breakpoint(current_env, bp) != 0) { |
| 796 | /* Try harder to find a CPU that currently sees the breakpoint. */ |
| 797 | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
| 798 | if (kvm_arch_remove_sw_breakpoint(env, bp) == 0) |
| 799 | break; |
| 800 | } |
| 801 | } |
| 802 | } |
| 803 | kvm_arch_remove_all_hw_breakpoints(); |
| 804 | |
| 805 | for (env = first_cpu; env != NULL; env = env->next_cpu) |
| 806 | kvm_update_guest_debug(env, 0); |
| 807 | } |
| 808 | |
| 809 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ |
| 810 | |
| 811 | int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) |
| 812 | { |
| 813 | return -EINVAL; |
| 814 | } |
| 815 | |
| 816 | int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr, |
| 817 | target_ulong len, int type) |
| 818 | { |
| 819 | return -EINVAL; |
| 820 | } |
| 821 | |
| 822 | int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr, |
| 823 | target_ulong len, int type) |
| 824 | { |
| 825 | return -EINVAL; |
| 826 | } |
| 827 | |
| 828 | void kvm_remove_all_breakpoints(CPUState *current_env) |
| 829 | { |
| 830 | } |
| 831 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ |