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Commit | Line | Data |
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05330448 AL |
1 | /* |
2 | * QEMU KVM support | |
3 | * | |
4 | * Copyright IBM, Corp. 2008 | |
5832d1f2 | 5 | * Red Hat, Inc. 2008 |
05330448 AL |
6 | * |
7 | * Authors: | |
8 | * Anthony Liguori <aliguori@us.ibm.com> | |
5832d1f2 | 9 | * Glauber Costa <gcosta@redhat.com> |
05330448 AL |
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> | |
984b5181 | 19 | #include <stdarg.h> |
05330448 AL |
20 | |
21 | #include <linux/kvm.h> | |
22 | ||
23 | #include "qemu-common.h" | |
85199474 | 24 | #include "qemu-barrier.h" |
ebd063d1 PB |
25 | #include "qemu-option.h" |
26 | #include "qemu-config.h" | |
05330448 | 27 | #include "sysemu.h" |
d33a1810 | 28 | #include "hw/hw.h" |
04fa27f5 | 29 | #include "hw/msi.h" |
e22a25c9 | 30 | #include "gdbstub.h" |
05330448 | 31 | #include "kvm.h" |
8369e01c | 32 | #include "bswap.h" |
a01672d3 | 33 | #include "memory.h" |
80a1ea37 | 34 | #include "exec-memory.h" |
753d5e14 | 35 | #include "event_notifier.h" |
05330448 | 36 | |
d2f2b8a7 SH |
37 | /* This check must be after config-host.h is included */ |
38 | #ifdef CONFIG_EVENTFD | |
39 | #include <sys/eventfd.h> | |
40 | #endif | |
41 | ||
93148aa5 | 42 | /* KVM uses PAGE_SIZE in its definition of COALESCED_MMIO_MAX */ |
f65ed4c1 AL |
43 | #define PAGE_SIZE TARGET_PAGE_SIZE |
44 | ||
05330448 AL |
45 | //#define DEBUG_KVM |
46 | ||
47 | #ifdef DEBUG_KVM | |
8c0d577e | 48 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
49 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
50 | #else | |
8c0d577e | 51 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
52 | do { } while (0) |
53 | #endif | |
54 | ||
04fa27f5 JK |
55 | #define KVM_MSI_HASHTAB_SIZE 256 |
56 | ||
34fc643f AL |
57 | typedef struct KVMSlot |
58 | { | |
c227f099 AL |
59 | target_phys_addr_t start_addr; |
60 | ram_addr_t memory_size; | |
9f213ed9 | 61 | void *ram; |
34fc643f AL |
62 | int slot; |
63 | int flags; | |
64 | } KVMSlot; | |
05330448 | 65 | |
5832d1f2 AL |
66 | typedef struct kvm_dirty_log KVMDirtyLog; |
67 | ||
05330448 AL |
68 | struct KVMState |
69 | { | |
70 | KVMSlot slots[32]; | |
71 | int fd; | |
72 | int vmfd; | |
f65ed4c1 | 73 | int coalesced_mmio; |
62a2744c | 74 | struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; |
1cae88b9 | 75 | bool coalesced_flush_in_progress; |
e69917e2 | 76 | int broken_set_mem_region; |
4495d6a7 | 77 | int migration_log; |
a0fb002c | 78 | int vcpu_events; |
b0b1d690 | 79 | int robust_singlestep; |
ff44f1a3 | 80 | int debugregs; |
e22a25c9 AL |
81 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
82 | struct kvm_sw_breakpoint_head kvm_sw_breakpoints; | |
83 | #endif | |
8a7c7393 | 84 | int pit_state2; |
f1665b21 | 85 | int xsave, xcrs; |
d2f2b8a7 | 86 | int many_ioeventfds; |
92e4b519 DG |
87 | /* The man page (and posix) say ioctl numbers are signed int, but |
88 | * they're not. Linux, glibc and *BSD all treat ioctl numbers as | |
89 | * unsigned, and treating them as signed here can break things */ | |
90 | unsigned irqchip_inject_ioctl; | |
84b058d7 JK |
91 | #ifdef KVM_CAP_IRQ_ROUTING |
92 | struct kvm_irq_routing *irq_routes; | |
93 | int nr_allocated_irq_routes; | |
94 | uint32_t *used_gsi_bitmap; | |
4e2e4e63 | 95 | unsigned int gsi_count; |
04fa27f5 | 96 | QTAILQ_HEAD(msi_hashtab, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE]; |
4a3adebb | 97 | bool direct_msi; |
84b058d7 | 98 | #endif |
05330448 AL |
99 | }; |
100 | ||
6a7af8cb | 101 | KVMState *kvm_state; |
3d4b2649 | 102 | bool kvm_kernel_irqchip; |
7ae26bd4 | 103 | bool kvm_async_interrupts_allowed; |
cc7e0ddf | 104 | bool kvm_irqfds_allowed; |
614e41bc | 105 | bool kvm_msi_via_irqfd_allowed; |
05330448 | 106 | |
94a8d39a JK |
107 | static const KVMCapabilityInfo kvm_required_capabilites[] = { |
108 | KVM_CAP_INFO(USER_MEMORY), | |
109 | KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS), | |
110 | KVM_CAP_LAST_INFO | |
111 | }; | |
112 | ||
05330448 AL |
113 | static KVMSlot *kvm_alloc_slot(KVMState *s) |
114 | { | |
115 | int i; | |
116 | ||
117 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
a426e122 | 118 | if (s->slots[i].memory_size == 0) { |
05330448 | 119 | return &s->slots[i]; |
a426e122 | 120 | } |
05330448 AL |
121 | } |
122 | ||
d3f8d37f AL |
123 | fprintf(stderr, "%s: no free slot available\n", __func__); |
124 | abort(); | |
125 | } | |
126 | ||
127 | static KVMSlot *kvm_lookup_matching_slot(KVMState *s, | |
c227f099 AL |
128 | target_phys_addr_t start_addr, |
129 | target_phys_addr_t end_addr) | |
d3f8d37f AL |
130 | { |
131 | int i; | |
132 | ||
133 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
134 | KVMSlot *mem = &s->slots[i]; | |
135 | ||
136 | if (start_addr == mem->start_addr && | |
137 | end_addr == mem->start_addr + mem->memory_size) { | |
138 | return mem; | |
139 | } | |
140 | } | |
141 | ||
05330448 AL |
142 | return NULL; |
143 | } | |
144 | ||
6152e2ae AL |
145 | /* |
146 | * Find overlapping slot with lowest start address | |
147 | */ | |
148 | static KVMSlot *kvm_lookup_overlapping_slot(KVMState *s, | |
c227f099 AL |
149 | target_phys_addr_t start_addr, |
150 | target_phys_addr_t end_addr) | |
05330448 | 151 | { |
6152e2ae | 152 | KVMSlot *found = NULL; |
05330448 AL |
153 | int i; |
154 | ||
155 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
156 | KVMSlot *mem = &s->slots[i]; | |
157 | ||
6152e2ae AL |
158 | if (mem->memory_size == 0 || |
159 | (found && found->start_addr < mem->start_addr)) { | |
160 | continue; | |
161 | } | |
162 | ||
163 | if (end_addr > mem->start_addr && | |
164 | start_addr < mem->start_addr + mem->memory_size) { | |
165 | found = mem; | |
166 | } | |
05330448 AL |
167 | } |
168 | ||
6152e2ae | 169 | return found; |
05330448 AL |
170 | } |
171 | ||
9f213ed9 AK |
172 | int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, |
173 | target_phys_addr_t *phys_addr) | |
983dfc3b HY |
174 | { |
175 | int i; | |
176 | ||
177 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
178 | KVMSlot *mem = &s->slots[i]; | |
179 | ||
9f213ed9 AK |
180 | if (ram >= mem->ram && ram < mem->ram + mem->memory_size) { |
181 | *phys_addr = mem->start_addr + (ram - mem->ram); | |
983dfc3b HY |
182 | return 1; |
183 | } | |
184 | } | |
185 | ||
186 | return 0; | |
187 | } | |
188 | ||
5832d1f2 AL |
189 | static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot) |
190 | { | |
191 | struct kvm_userspace_memory_region mem; | |
192 | ||
193 | mem.slot = slot->slot; | |
194 | mem.guest_phys_addr = slot->start_addr; | |
195 | mem.memory_size = slot->memory_size; | |
9f213ed9 | 196 | mem.userspace_addr = (unsigned long)slot->ram; |
5832d1f2 | 197 | mem.flags = slot->flags; |
4495d6a7 JK |
198 | if (s->migration_log) { |
199 | mem.flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
200 | } | |
5832d1f2 AL |
201 | return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); |
202 | } | |
203 | ||
8d2ba1fb JK |
204 | static void kvm_reset_vcpu(void *opaque) |
205 | { | |
9349b4f9 | 206 | CPUArchState *env = opaque; |
8d2ba1fb | 207 | |
caa5af0f | 208 | kvm_arch_reset_vcpu(env); |
8d2ba1fb | 209 | } |
5832d1f2 | 210 | |
9349b4f9 | 211 | int kvm_init_vcpu(CPUArchState *env) |
05330448 AL |
212 | { |
213 | KVMState *s = kvm_state; | |
214 | long mmap_size; | |
215 | int ret; | |
216 | ||
8c0d577e | 217 | DPRINTF("kvm_init_vcpu\n"); |
05330448 | 218 | |
984b5181 | 219 | ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, env->cpu_index); |
05330448 | 220 | if (ret < 0) { |
8c0d577e | 221 | DPRINTF("kvm_create_vcpu failed\n"); |
05330448 AL |
222 | goto err; |
223 | } | |
224 | ||
225 | env->kvm_fd = ret; | |
226 | env->kvm_state = s; | |
d841b6c4 | 227 | env->kvm_vcpu_dirty = 1; |
05330448 AL |
228 | |
229 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
230 | if (mmap_size < 0) { | |
748a680b | 231 | ret = mmap_size; |
8c0d577e | 232 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); |
05330448 AL |
233 | goto err; |
234 | } | |
235 | ||
236 | env->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, | |
237 | env->kvm_fd, 0); | |
238 | if (env->kvm_run == MAP_FAILED) { | |
239 | ret = -errno; | |
8c0d577e | 240 | DPRINTF("mmap'ing vcpu state failed\n"); |
05330448 AL |
241 | goto err; |
242 | } | |
243 | ||
a426e122 JK |
244 | if (s->coalesced_mmio && !s->coalesced_mmio_ring) { |
245 | s->coalesced_mmio_ring = | |
246 | (void *)env->kvm_run + s->coalesced_mmio * PAGE_SIZE; | |
247 | } | |
62a2744c | 248 | |
05330448 | 249 | ret = kvm_arch_init_vcpu(env); |
8d2ba1fb | 250 | if (ret == 0) { |
a08d4367 | 251 | qemu_register_reset(kvm_reset_vcpu, env); |
caa5af0f | 252 | kvm_arch_reset_vcpu(env); |
8d2ba1fb | 253 | } |
05330448 AL |
254 | err: |
255 | return ret; | |
256 | } | |
257 | ||
5832d1f2 AL |
258 | /* |
259 | * dirty pages logging control | |
260 | */ | |
25254bbc MT |
261 | |
262 | static int kvm_mem_flags(KVMState *s, bool log_dirty) | |
263 | { | |
264 | return log_dirty ? KVM_MEM_LOG_DIRTY_PAGES : 0; | |
265 | } | |
266 | ||
267 | static int kvm_slot_dirty_pages_log_change(KVMSlot *mem, bool log_dirty) | |
5832d1f2 AL |
268 | { |
269 | KVMState *s = kvm_state; | |
25254bbc | 270 | int flags, mask = KVM_MEM_LOG_DIRTY_PAGES; |
4495d6a7 JK |
271 | int old_flags; |
272 | ||
4495d6a7 | 273 | old_flags = mem->flags; |
5832d1f2 | 274 | |
25254bbc | 275 | flags = (mem->flags & ~mask) | kvm_mem_flags(s, log_dirty); |
5832d1f2 AL |
276 | mem->flags = flags; |
277 | ||
4495d6a7 JK |
278 | /* If nothing changed effectively, no need to issue ioctl */ |
279 | if (s->migration_log) { | |
280 | flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
281 | } | |
25254bbc | 282 | |
4495d6a7 | 283 | if (flags == old_flags) { |
25254bbc | 284 | return 0; |
4495d6a7 JK |
285 | } |
286 | ||
5832d1f2 AL |
287 | return kvm_set_user_memory_region(s, mem); |
288 | } | |
289 | ||
25254bbc MT |
290 | static int kvm_dirty_pages_log_change(target_phys_addr_t phys_addr, |
291 | ram_addr_t size, bool log_dirty) | |
292 | { | |
293 | KVMState *s = kvm_state; | |
294 | KVMSlot *mem = kvm_lookup_matching_slot(s, phys_addr, phys_addr + size); | |
295 | ||
296 | if (mem == NULL) { | |
297 | fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-" | |
298 | TARGET_FMT_plx "\n", __func__, phys_addr, | |
299 | (target_phys_addr_t)(phys_addr + size - 1)); | |
300 | return -EINVAL; | |
301 | } | |
302 | return kvm_slot_dirty_pages_log_change(mem, log_dirty); | |
303 | } | |
304 | ||
a01672d3 AK |
305 | static void kvm_log_start(MemoryListener *listener, |
306 | MemoryRegionSection *section) | |
5832d1f2 | 307 | { |
a01672d3 AK |
308 | int r; |
309 | ||
310 | r = kvm_dirty_pages_log_change(section->offset_within_address_space, | |
311 | section->size, true); | |
312 | if (r < 0) { | |
313 | abort(); | |
314 | } | |
5832d1f2 AL |
315 | } |
316 | ||
a01672d3 AK |
317 | static void kvm_log_stop(MemoryListener *listener, |
318 | MemoryRegionSection *section) | |
5832d1f2 | 319 | { |
a01672d3 AK |
320 | int r; |
321 | ||
322 | r = kvm_dirty_pages_log_change(section->offset_within_address_space, | |
323 | section->size, false); | |
324 | if (r < 0) { | |
325 | abort(); | |
326 | } | |
5832d1f2 AL |
327 | } |
328 | ||
7b8f3b78 | 329 | static int kvm_set_migration_log(int enable) |
4495d6a7 JK |
330 | { |
331 | KVMState *s = kvm_state; | |
332 | KVMSlot *mem; | |
333 | int i, err; | |
334 | ||
335 | s->migration_log = enable; | |
336 | ||
337 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
338 | mem = &s->slots[i]; | |
339 | ||
70fedd76 AW |
340 | if (!mem->memory_size) { |
341 | continue; | |
342 | } | |
4495d6a7 JK |
343 | if (!!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) == enable) { |
344 | continue; | |
345 | } | |
346 | err = kvm_set_user_memory_region(s, mem); | |
347 | if (err) { | |
348 | return err; | |
349 | } | |
350 | } | |
351 | return 0; | |
352 | } | |
353 | ||
8369e01c | 354 | /* get kvm's dirty pages bitmap and update qemu's */ |
ffcde12f AK |
355 | static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section, |
356 | unsigned long *bitmap) | |
96c1606b | 357 | { |
8369e01c | 358 | unsigned int i, j; |
aa90fec7 BH |
359 | unsigned long page_number, c; |
360 | target_phys_addr_t addr, addr1; | |
ffcde12f | 361 | unsigned int len = ((section->size / TARGET_PAGE_SIZE) + HOST_LONG_BITS - 1) / HOST_LONG_BITS; |
3145fcb6 | 362 | unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE; |
8369e01c MT |
363 | |
364 | /* | |
365 | * bitmap-traveling is faster than memory-traveling (for addr...) | |
366 | * especially when most of the memory is not dirty. | |
367 | */ | |
368 | for (i = 0; i < len; i++) { | |
369 | if (bitmap[i] != 0) { | |
370 | c = leul_to_cpu(bitmap[i]); | |
371 | do { | |
372 | j = ffsl(c) - 1; | |
373 | c &= ~(1ul << j); | |
3145fcb6 | 374 | page_number = (i * HOST_LONG_BITS + j) * hpratio; |
8369e01c | 375 | addr1 = page_number * TARGET_PAGE_SIZE; |
ffcde12f | 376 | addr = section->offset_within_region + addr1; |
3145fcb6 DG |
377 | memory_region_set_dirty(section->mr, addr, |
378 | TARGET_PAGE_SIZE * hpratio); | |
8369e01c MT |
379 | } while (c != 0); |
380 | } | |
381 | } | |
382 | return 0; | |
96c1606b AG |
383 | } |
384 | ||
8369e01c MT |
385 | #define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) |
386 | ||
5832d1f2 AL |
387 | /** |
388 | * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space | |
fd4aa979 BS |
389 | * This function updates qemu's dirty bitmap using |
390 | * memory_region_set_dirty(). This means all bits are set | |
391 | * to dirty. | |
5832d1f2 | 392 | * |
d3f8d37f | 393 | * @start_add: start of logged region. |
5832d1f2 AL |
394 | * @end_addr: end of logged region. |
395 | */ | |
ffcde12f | 396 | static int kvm_physical_sync_dirty_bitmap(MemoryRegionSection *section) |
5832d1f2 AL |
397 | { |
398 | KVMState *s = kvm_state; | |
151f7749 | 399 | unsigned long size, allocated_size = 0; |
151f7749 JK |
400 | KVMDirtyLog d; |
401 | KVMSlot *mem; | |
402 | int ret = 0; | |
ffcde12f AK |
403 | target_phys_addr_t start_addr = section->offset_within_address_space; |
404 | target_phys_addr_t end_addr = start_addr + section->size; | |
5832d1f2 | 405 | |
151f7749 JK |
406 | d.dirty_bitmap = NULL; |
407 | while (start_addr < end_addr) { | |
408 | mem = kvm_lookup_overlapping_slot(s, start_addr, end_addr); | |
409 | if (mem == NULL) { | |
410 | break; | |
411 | } | |
5832d1f2 | 412 | |
51b0c606 MT |
413 | /* XXX bad kernel interface alert |
414 | * For dirty bitmap, kernel allocates array of size aligned to | |
415 | * bits-per-long. But for case when the kernel is 64bits and | |
416 | * the userspace is 32bits, userspace can't align to the same | |
417 | * bits-per-long, since sizeof(long) is different between kernel | |
418 | * and user space. This way, userspace will provide buffer which | |
419 | * may be 4 bytes less than the kernel will use, resulting in | |
420 | * userspace memory corruption (which is not detectable by valgrind | |
421 | * too, in most cases). | |
422 | * So for now, let's align to 64 instead of HOST_LONG_BITS here, in | |
423 | * a hope that sizeof(long) wont become >8 any time soon. | |
424 | */ | |
425 | size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), | |
426 | /*HOST_LONG_BITS*/ 64) / 8; | |
151f7749 | 427 | if (!d.dirty_bitmap) { |
7267c094 | 428 | d.dirty_bitmap = g_malloc(size); |
151f7749 | 429 | } else if (size > allocated_size) { |
7267c094 | 430 | d.dirty_bitmap = g_realloc(d.dirty_bitmap, size); |
151f7749 JK |
431 | } |
432 | allocated_size = size; | |
433 | memset(d.dirty_bitmap, 0, allocated_size); | |
5832d1f2 | 434 | |
151f7749 | 435 | d.slot = mem->slot; |
5832d1f2 | 436 | |
6e489f3f | 437 | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { |
8c0d577e | 438 | DPRINTF("ioctl failed %d\n", errno); |
151f7749 JK |
439 | ret = -1; |
440 | break; | |
441 | } | |
5832d1f2 | 442 | |
ffcde12f | 443 | kvm_get_dirty_pages_log_range(section, d.dirty_bitmap); |
8369e01c | 444 | start_addr = mem->start_addr + mem->memory_size; |
5832d1f2 | 445 | } |
7267c094 | 446 | g_free(d.dirty_bitmap); |
151f7749 JK |
447 | |
448 | return ret; | |
5832d1f2 AL |
449 | } |
450 | ||
c227f099 | 451 | int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size) |
f65ed4c1 AL |
452 | { |
453 | int ret = -ENOSYS; | |
f65ed4c1 AL |
454 | KVMState *s = kvm_state; |
455 | ||
456 | if (s->coalesced_mmio) { | |
457 | struct kvm_coalesced_mmio_zone zone; | |
458 | ||
459 | zone.addr = start; | |
460 | zone.size = size; | |
7e680753 | 461 | zone.pad = 0; |
f65ed4c1 AL |
462 | |
463 | ret = kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); | |
464 | } | |
f65ed4c1 AL |
465 | |
466 | return ret; | |
467 | } | |
468 | ||
c227f099 | 469 | int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size) |
f65ed4c1 AL |
470 | { |
471 | int ret = -ENOSYS; | |
f65ed4c1 AL |
472 | KVMState *s = kvm_state; |
473 | ||
474 | if (s->coalesced_mmio) { | |
475 | struct kvm_coalesced_mmio_zone zone; | |
476 | ||
477 | zone.addr = start; | |
478 | zone.size = size; | |
7e680753 | 479 | zone.pad = 0; |
f65ed4c1 AL |
480 | |
481 | ret = kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); | |
482 | } | |
f65ed4c1 AL |
483 | |
484 | return ret; | |
485 | } | |
486 | ||
ad7b8b33 AL |
487 | int kvm_check_extension(KVMState *s, unsigned int extension) |
488 | { | |
489 | int ret; | |
490 | ||
491 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
492 | if (ret < 0) { | |
493 | ret = 0; | |
494 | } | |
495 | ||
496 | return ret; | |
497 | } | |
498 | ||
d2f2b8a7 SH |
499 | static int kvm_check_many_ioeventfds(void) |
500 | { | |
d0dcac83 SH |
501 | /* Userspace can use ioeventfd for io notification. This requires a host |
502 | * that supports eventfd(2) and an I/O thread; since eventfd does not | |
503 | * support SIGIO it cannot interrupt the vcpu. | |
504 | * | |
505 | * Older kernels have a 6 device limit on the KVM io bus. Find out so we | |
d2f2b8a7 SH |
506 | * can avoid creating too many ioeventfds. |
507 | */ | |
12d4536f | 508 | #if defined(CONFIG_EVENTFD) |
d2f2b8a7 SH |
509 | int ioeventfds[7]; |
510 | int i, ret = 0; | |
511 | for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { | |
512 | ioeventfds[i] = eventfd(0, EFD_CLOEXEC); | |
513 | if (ioeventfds[i] < 0) { | |
514 | break; | |
515 | } | |
516 | ret = kvm_set_ioeventfd_pio_word(ioeventfds[i], 0, i, true); | |
517 | if (ret < 0) { | |
518 | close(ioeventfds[i]); | |
519 | break; | |
520 | } | |
521 | } | |
522 | ||
523 | /* Decide whether many devices are supported or not */ | |
524 | ret = i == ARRAY_SIZE(ioeventfds); | |
525 | ||
526 | while (i-- > 0) { | |
527 | kvm_set_ioeventfd_pio_word(ioeventfds[i], 0, i, false); | |
528 | close(ioeventfds[i]); | |
529 | } | |
530 | return ret; | |
531 | #else | |
532 | return 0; | |
533 | #endif | |
534 | } | |
535 | ||
94a8d39a JK |
536 | static const KVMCapabilityInfo * |
537 | kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list) | |
538 | { | |
539 | while (list->name) { | |
540 | if (!kvm_check_extension(s, list->value)) { | |
541 | return list; | |
542 | } | |
543 | list++; | |
544 | } | |
545 | return NULL; | |
546 | } | |
547 | ||
a01672d3 | 548 | static void kvm_set_phys_mem(MemoryRegionSection *section, bool add) |
46dbef6a MT |
549 | { |
550 | KVMState *s = kvm_state; | |
46dbef6a MT |
551 | KVMSlot *mem, old; |
552 | int err; | |
a01672d3 AK |
553 | MemoryRegion *mr = section->mr; |
554 | bool log_dirty = memory_region_is_logging(mr); | |
555 | target_phys_addr_t start_addr = section->offset_within_address_space; | |
556 | ram_addr_t size = section->size; | |
9f213ed9 | 557 | void *ram = NULL; |
8f6f962b | 558 | unsigned delta; |
46dbef6a | 559 | |
14542fea GN |
560 | /* kvm works in page size chunks, but the function may be called |
561 | with sub-page size and unaligned start address. */ | |
8f6f962b AK |
562 | delta = TARGET_PAGE_ALIGN(size) - size; |
563 | if (delta > size) { | |
564 | return; | |
565 | } | |
566 | start_addr += delta; | |
567 | size -= delta; | |
568 | size &= TARGET_PAGE_MASK; | |
569 | if (!size || (start_addr & ~TARGET_PAGE_MASK)) { | |
570 | return; | |
571 | } | |
46dbef6a | 572 | |
a01672d3 AK |
573 | if (!memory_region_is_ram(mr)) { |
574 | return; | |
9f213ed9 AK |
575 | } |
576 | ||
8f6f962b | 577 | ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + delta; |
a01672d3 | 578 | |
46dbef6a MT |
579 | while (1) { |
580 | mem = kvm_lookup_overlapping_slot(s, start_addr, start_addr + size); | |
581 | if (!mem) { | |
582 | break; | |
583 | } | |
584 | ||
a01672d3 | 585 | if (add && start_addr >= mem->start_addr && |
46dbef6a | 586 | (start_addr + size <= mem->start_addr + mem->memory_size) && |
9f213ed9 | 587 | (ram - start_addr == mem->ram - mem->start_addr)) { |
46dbef6a | 588 | /* The new slot fits into the existing one and comes with |
25254bbc MT |
589 | * identical parameters - update flags and done. */ |
590 | kvm_slot_dirty_pages_log_change(mem, log_dirty); | |
46dbef6a MT |
591 | return; |
592 | } | |
593 | ||
594 | old = *mem; | |
595 | ||
3fbffb62 AK |
596 | if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { |
597 | kvm_physical_sync_dirty_bitmap(section); | |
598 | } | |
599 | ||
46dbef6a MT |
600 | /* unregister the overlapping slot */ |
601 | mem->memory_size = 0; | |
602 | err = kvm_set_user_memory_region(s, mem); | |
603 | if (err) { | |
604 | fprintf(stderr, "%s: error unregistering overlapping slot: %s\n", | |
605 | __func__, strerror(-err)); | |
606 | abort(); | |
607 | } | |
608 | ||
609 | /* Workaround for older KVM versions: we can't join slots, even not by | |
610 | * unregistering the previous ones and then registering the larger | |
611 | * slot. We have to maintain the existing fragmentation. Sigh. | |
612 | * | |
613 | * This workaround assumes that the new slot starts at the same | |
614 | * address as the first existing one. If not or if some overlapping | |
615 | * slot comes around later, we will fail (not seen in practice so far) | |
616 | * - and actually require a recent KVM version. */ | |
617 | if (s->broken_set_mem_region && | |
a01672d3 | 618 | old.start_addr == start_addr && old.memory_size < size && add) { |
46dbef6a MT |
619 | mem = kvm_alloc_slot(s); |
620 | mem->memory_size = old.memory_size; | |
621 | mem->start_addr = old.start_addr; | |
9f213ed9 | 622 | mem->ram = old.ram; |
25254bbc | 623 | mem->flags = kvm_mem_flags(s, log_dirty); |
46dbef6a MT |
624 | |
625 | err = kvm_set_user_memory_region(s, mem); | |
626 | if (err) { | |
627 | fprintf(stderr, "%s: error updating slot: %s\n", __func__, | |
628 | strerror(-err)); | |
629 | abort(); | |
630 | } | |
631 | ||
632 | start_addr += old.memory_size; | |
9f213ed9 | 633 | ram += old.memory_size; |
46dbef6a MT |
634 | size -= old.memory_size; |
635 | continue; | |
636 | } | |
637 | ||
638 | /* register prefix slot */ | |
639 | if (old.start_addr < start_addr) { | |
640 | mem = kvm_alloc_slot(s); | |
641 | mem->memory_size = start_addr - old.start_addr; | |
642 | mem->start_addr = old.start_addr; | |
9f213ed9 | 643 | mem->ram = old.ram; |
25254bbc | 644 | mem->flags = kvm_mem_flags(s, log_dirty); |
46dbef6a MT |
645 | |
646 | err = kvm_set_user_memory_region(s, mem); | |
647 | if (err) { | |
648 | fprintf(stderr, "%s: error registering prefix slot: %s\n", | |
649 | __func__, strerror(-err)); | |
d4d6868f AG |
650 | #ifdef TARGET_PPC |
651 | fprintf(stderr, "%s: This is probably because your kernel's " \ | |
652 | "PAGE_SIZE is too big. Please try to use 4k " \ | |
653 | "PAGE_SIZE!\n", __func__); | |
654 | #endif | |
46dbef6a MT |
655 | abort(); |
656 | } | |
657 | } | |
658 | ||
659 | /* register suffix slot */ | |
660 | if (old.start_addr + old.memory_size > start_addr + size) { | |
661 | ram_addr_t size_delta; | |
662 | ||
663 | mem = kvm_alloc_slot(s); | |
664 | mem->start_addr = start_addr + size; | |
665 | size_delta = mem->start_addr - old.start_addr; | |
666 | mem->memory_size = old.memory_size - size_delta; | |
9f213ed9 | 667 | mem->ram = old.ram + size_delta; |
25254bbc | 668 | mem->flags = kvm_mem_flags(s, log_dirty); |
46dbef6a MT |
669 | |
670 | err = kvm_set_user_memory_region(s, mem); | |
671 | if (err) { | |
672 | fprintf(stderr, "%s: error registering suffix slot: %s\n", | |
673 | __func__, strerror(-err)); | |
674 | abort(); | |
675 | } | |
676 | } | |
677 | } | |
678 | ||
679 | /* in case the KVM bug workaround already "consumed" the new slot */ | |
a426e122 | 680 | if (!size) { |
46dbef6a | 681 | return; |
a426e122 | 682 | } |
a01672d3 | 683 | if (!add) { |
46dbef6a | 684 | return; |
a426e122 | 685 | } |
46dbef6a MT |
686 | mem = kvm_alloc_slot(s); |
687 | mem->memory_size = size; | |
688 | mem->start_addr = start_addr; | |
9f213ed9 | 689 | mem->ram = ram; |
25254bbc | 690 | mem->flags = kvm_mem_flags(s, log_dirty); |
46dbef6a MT |
691 | |
692 | err = kvm_set_user_memory_region(s, mem); | |
693 | if (err) { | |
694 | fprintf(stderr, "%s: error registering slot: %s\n", __func__, | |
695 | strerror(-err)); | |
696 | abort(); | |
697 | } | |
698 | } | |
699 | ||
50c1e149 AK |
700 | static void kvm_begin(MemoryListener *listener) |
701 | { | |
702 | } | |
703 | ||
704 | static void kvm_commit(MemoryListener *listener) | |
705 | { | |
706 | } | |
707 | ||
a01672d3 AK |
708 | static void kvm_region_add(MemoryListener *listener, |
709 | MemoryRegionSection *section) | |
710 | { | |
711 | kvm_set_phys_mem(section, true); | |
712 | } | |
713 | ||
714 | static void kvm_region_del(MemoryListener *listener, | |
715 | MemoryRegionSection *section) | |
716 | { | |
717 | kvm_set_phys_mem(section, false); | |
718 | } | |
719 | ||
50c1e149 AK |
720 | static void kvm_region_nop(MemoryListener *listener, |
721 | MemoryRegionSection *section) | |
722 | { | |
723 | } | |
724 | ||
a01672d3 AK |
725 | static void kvm_log_sync(MemoryListener *listener, |
726 | MemoryRegionSection *section) | |
7b8f3b78 | 727 | { |
a01672d3 AK |
728 | int r; |
729 | ||
ffcde12f | 730 | r = kvm_physical_sync_dirty_bitmap(section); |
a01672d3 AK |
731 | if (r < 0) { |
732 | abort(); | |
733 | } | |
7b8f3b78 MT |
734 | } |
735 | ||
a01672d3 | 736 | static void kvm_log_global_start(struct MemoryListener *listener) |
7b8f3b78 | 737 | { |
a01672d3 AK |
738 | int r; |
739 | ||
740 | r = kvm_set_migration_log(1); | |
741 | assert(r >= 0); | |
7b8f3b78 MT |
742 | } |
743 | ||
a01672d3 | 744 | static void kvm_log_global_stop(struct MemoryListener *listener) |
7b8f3b78 | 745 | { |
a01672d3 AK |
746 | int r; |
747 | ||
748 | r = kvm_set_migration_log(0); | |
749 | assert(r >= 0); | |
7b8f3b78 MT |
750 | } |
751 | ||
80a1ea37 AK |
752 | static void kvm_mem_ioeventfd_add(MemoryRegionSection *section, |
753 | bool match_data, uint64_t data, int fd) | |
754 | { | |
755 | int r; | |
756 | ||
4b8f1c88 | 757 | assert(match_data && section->size <= 8); |
80a1ea37 | 758 | |
4b8f1c88 MT |
759 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
760 | data, true, section->size); | |
80a1ea37 AK |
761 | if (r < 0) { |
762 | abort(); | |
763 | } | |
764 | } | |
765 | ||
766 | static void kvm_mem_ioeventfd_del(MemoryRegionSection *section, | |
767 | bool match_data, uint64_t data, int fd) | |
768 | { | |
769 | int r; | |
770 | ||
4b8f1c88 MT |
771 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
772 | data, false, section->size); | |
80a1ea37 AK |
773 | if (r < 0) { |
774 | abort(); | |
775 | } | |
776 | } | |
777 | ||
778 | static void kvm_io_ioeventfd_add(MemoryRegionSection *section, | |
779 | bool match_data, uint64_t data, int fd) | |
780 | { | |
781 | int r; | |
782 | ||
783 | assert(match_data && section->size == 2); | |
784 | ||
785 | r = kvm_set_ioeventfd_pio_word(fd, section->offset_within_address_space, | |
786 | data, true); | |
787 | if (r < 0) { | |
788 | abort(); | |
789 | } | |
790 | } | |
791 | ||
792 | static void kvm_io_ioeventfd_del(MemoryRegionSection *section, | |
793 | bool match_data, uint64_t data, int fd) | |
794 | ||
795 | { | |
796 | int r; | |
797 | ||
798 | r = kvm_set_ioeventfd_pio_word(fd, section->offset_within_address_space, | |
799 | data, false); | |
800 | if (r < 0) { | |
801 | abort(); | |
802 | } | |
803 | } | |
804 | ||
805 | static void kvm_eventfd_add(MemoryListener *listener, | |
806 | MemoryRegionSection *section, | |
753d5e14 PB |
807 | bool match_data, uint64_t data, |
808 | EventNotifier *e) | |
80a1ea37 AK |
809 | { |
810 | if (section->address_space == get_system_memory()) { | |
753d5e14 PB |
811 | kvm_mem_ioeventfd_add(section, match_data, data, |
812 | event_notifier_get_fd(e)); | |
80a1ea37 | 813 | } else { |
753d5e14 PB |
814 | kvm_io_ioeventfd_add(section, match_data, data, |
815 | event_notifier_get_fd(e)); | |
80a1ea37 AK |
816 | } |
817 | } | |
818 | ||
819 | static void kvm_eventfd_del(MemoryListener *listener, | |
820 | MemoryRegionSection *section, | |
753d5e14 PB |
821 | bool match_data, uint64_t data, |
822 | EventNotifier *e) | |
80a1ea37 AK |
823 | { |
824 | if (section->address_space == get_system_memory()) { | |
753d5e14 PB |
825 | kvm_mem_ioeventfd_del(section, match_data, data, |
826 | event_notifier_get_fd(e)); | |
80a1ea37 | 827 | } else { |
753d5e14 PB |
828 | kvm_io_ioeventfd_del(section, match_data, data, |
829 | event_notifier_get_fd(e)); | |
80a1ea37 AK |
830 | } |
831 | } | |
832 | ||
a01672d3 | 833 | static MemoryListener kvm_memory_listener = { |
50c1e149 AK |
834 | .begin = kvm_begin, |
835 | .commit = kvm_commit, | |
a01672d3 AK |
836 | .region_add = kvm_region_add, |
837 | .region_del = kvm_region_del, | |
50c1e149 | 838 | .region_nop = kvm_region_nop, |
e5896b12 AP |
839 | .log_start = kvm_log_start, |
840 | .log_stop = kvm_log_stop, | |
a01672d3 AK |
841 | .log_sync = kvm_log_sync, |
842 | .log_global_start = kvm_log_global_start, | |
843 | .log_global_stop = kvm_log_global_stop, | |
80a1ea37 AK |
844 | .eventfd_add = kvm_eventfd_add, |
845 | .eventfd_del = kvm_eventfd_del, | |
72e22d2f | 846 | .priority = 10, |
7b8f3b78 MT |
847 | }; |
848 | ||
9349b4f9 | 849 | static void kvm_handle_interrupt(CPUArchState *env, int mask) |
aa7f74d1 JK |
850 | { |
851 | env->interrupt_request |= mask; | |
852 | ||
853 | if (!qemu_cpu_is_self(env)) { | |
854 | qemu_cpu_kick(env); | |
855 | } | |
856 | } | |
857 | ||
3889c3fa | 858 | int kvm_set_irq(KVMState *s, int irq, int level) |
84b058d7 JK |
859 | { |
860 | struct kvm_irq_level event; | |
861 | int ret; | |
862 | ||
7ae26bd4 | 863 | assert(kvm_async_interrupts_enabled()); |
84b058d7 JK |
864 | |
865 | event.level = level; | |
866 | event.irq = irq; | |
867 | ret = kvm_vm_ioctl(s, s->irqchip_inject_ioctl, &event); | |
868 | if (ret < 0) { | |
3889c3fa | 869 | perror("kvm_set_irq"); |
84b058d7 JK |
870 | abort(); |
871 | } | |
872 | ||
873 | return (s->irqchip_inject_ioctl == KVM_IRQ_LINE) ? 1 : event.status; | |
874 | } | |
875 | ||
876 | #ifdef KVM_CAP_IRQ_ROUTING | |
d3d3bef0 JK |
877 | typedef struct KVMMSIRoute { |
878 | struct kvm_irq_routing_entry kroute; | |
879 | QTAILQ_ENTRY(KVMMSIRoute) entry; | |
880 | } KVMMSIRoute; | |
881 | ||
84b058d7 JK |
882 | static void set_gsi(KVMState *s, unsigned int gsi) |
883 | { | |
84b058d7 JK |
884 | s->used_gsi_bitmap[gsi / 32] |= 1U << (gsi % 32); |
885 | } | |
886 | ||
04fa27f5 JK |
887 | static void clear_gsi(KVMState *s, unsigned int gsi) |
888 | { | |
889 | s->used_gsi_bitmap[gsi / 32] &= ~(1U << (gsi % 32)); | |
890 | } | |
891 | ||
84b058d7 JK |
892 | static void kvm_init_irq_routing(KVMState *s) |
893 | { | |
04fa27f5 | 894 | int gsi_count, i; |
84b058d7 JK |
895 | |
896 | gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING); | |
897 | if (gsi_count > 0) { | |
898 | unsigned int gsi_bits, i; | |
899 | ||
900 | /* Round up so we can search ints using ffs */ | |
bc8c6788 | 901 | gsi_bits = ALIGN(gsi_count, 32); |
84b058d7 | 902 | s->used_gsi_bitmap = g_malloc0(gsi_bits / 8); |
4e2e4e63 | 903 | s->gsi_count = gsi_count; |
84b058d7 JK |
904 | |
905 | /* Mark any over-allocated bits as already in use */ | |
906 | for (i = gsi_count; i < gsi_bits; i++) { | |
907 | set_gsi(s, i); | |
908 | } | |
909 | } | |
910 | ||
911 | s->irq_routes = g_malloc0(sizeof(*s->irq_routes)); | |
912 | s->nr_allocated_irq_routes = 0; | |
913 | ||
4a3adebb JK |
914 | if (!s->direct_msi) { |
915 | for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) { | |
916 | QTAILQ_INIT(&s->msi_hashtab[i]); | |
917 | } | |
04fa27f5 JK |
918 | } |
919 | ||
84b058d7 JK |
920 | kvm_arch_init_irq_routing(s); |
921 | } | |
922 | ||
e7b20308 JK |
923 | static void kvm_irqchip_commit_routes(KVMState *s) |
924 | { | |
925 | int ret; | |
926 | ||
927 | s->irq_routes->flags = 0; | |
928 | ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); | |
929 | assert(ret == 0); | |
930 | } | |
931 | ||
84b058d7 JK |
932 | static void kvm_add_routing_entry(KVMState *s, |
933 | struct kvm_irq_routing_entry *entry) | |
934 | { | |
935 | struct kvm_irq_routing_entry *new; | |
936 | int n, size; | |
937 | ||
938 | if (s->irq_routes->nr == s->nr_allocated_irq_routes) { | |
939 | n = s->nr_allocated_irq_routes * 2; | |
940 | if (n < 64) { | |
941 | n = 64; | |
942 | } | |
943 | size = sizeof(struct kvm_irq_routing); | |
944 | size += n * sizeof(*new); | |
945 | s->irq_routes = g_realloc(s->irq_routes, size); | |
946 | s->nr_allocated_irq_routes = n; | |
947 | } | |
948 | n = s->irq_routes->nr++; | |
949 | new = &s->irq_routes->entries[n]; | |
950 | memset(new, 0, sizeof(*new)); | |
951 | new->gsi = entry->gsi; | |
952 | new->type = entry->type; | |
953 | new->flags = entry->flags; | |
954 | new->u = entry->u; | |
955 | ||
956 | set_gsi(s, entry->gsi); | |
e7b20308 JK |
957 | |
958 | kvm_irqchip_commit_routes(s); | |
84b058d7 JK |
959 | } |
960 | ||
1df186df | 961 | void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin) |
84b058d7 JK |
962 | { |
963 | struct kvm_irq_routing_entry e; | |
964 | ||
4e2e4e63 JK |
965 | assert(pin < s->gsi_count); |
966 | ||
84b058d7 JK |
967 | e.gsi = irq; |
968 | e.type = KVM_IRQ_ROUTING_IRQCHIP; | |
969 | e.flags = 0; | |
970 | e.u.irqchip.irqchip = irqchip; | |
971 | e.u.irqchip.pin = pin; | |
972 | kvm_add_routing_entry(s, &e); | |
973 | } | |
974 | ||
1e2aa8be | 975 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
04fa27f5 JK |
976 | { |
977 | struct kvm_irq_routing_entry *e; | |
978 | int i; | |
979 | ||
980 | for (i = 0; i < s->irq_routes->nr; i++) { | |
981 | e = &s->irq_routes->entries[i]; | |
982 | if (e->gsi == virq) { | |
983 | s->irq_routes->nr--; | |
984 | *e = s->irq_routes->entries[s->irq_routes->nr]; | |
985 | } | |
986 | } | |
987 | clear_gsi(s, virq); | |
e7b20308 JK |
988 | |
989 | kvm_irqchip_commit_routes(s); | |
04fa27f5 JK |
990 | } |
991 | ||
992 | static unsigned int kvm_hash_msi(uint32_t data) | |
993 | { | |
994 | /* This is optimized for IA32 MSI layout. However, no other arch shall | |
995 | * repeat the mistake of not providing a direct MSI injection API. */ | |
996 | return data & 0xff; | |
997 | } | |
998 | ||
999 | static void kvm_flush_dynamic_msi_routes(KVMState *s) | |
1000 | { | |
1001 | KVMMSIRoute *route, *next; | |
1002 | unsigned int hash; | |
1003 | ||
1004 | for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) { | |
1005 | QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) { | |
1006 | kvm_irqchip_release_virq(s, route->kroute.gsi); | |
1007 | QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry); | |
1008 | g_free(route); | |
1009 | } | |
1010 | } | |
1011 | } | |
1012 | ||
1013 | static int kvm_irqchip_get_virq(KVMState *s) | |
1014 | { | |
1015 | uint32_t *word = s->used_gsi_bitmap; | |
1016 | int max_words = ALIGN(s->gsi_count, 32) / 32; | |
1017 | int i, bit; | |
1018 | bool retry = true; | |
1019 | ||
1020 | again: | |
1021 | /* Return the lowest unused GSI in the bitmap */ | |
1022 | for (i = 0; i < max_words; i++) { | |
1023 | bit = ffs(~word[i]); | |
1024 | if (!bit) { | |
1025 | continue; | |
1026 | } | |
1027 | ||
1028 | return bit - 1 + i * 32; | |
1029 | } | |
4a3adebb | 1030 | if (!s->direct_msi && retry) { |
04fa27f5 JK |
1031 | retry = false; |
1032 | kvm_flush_dynamic_msi_routes(s); | |
1033 | goto again; | |
1034 | } | |
1035 | return -ENOSPC; | |
1036 | ||
1037 | } | |
1038 | ||
1039 | static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg) | |
1040 | { | |
1041 | unsigned int hash = kvm_hash_msi(msg.data); | |
1042 | KVMMSIRoute *route; | |
1043 | ||
1044 | QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) { | |
1045 | if (route->kroute.u.msi.address_lo == (uint32_t)msg.address && | |
1046 | route->kroute.u.msi.address_hi == (msg.address >> 32) && | |
1047 | route->kroute.u.msi.data == msg.data) { | |
1048 | return route; | |
1049 | } | |
1050 | } | |
1051 | return NULL; | |
1052 | } | |
1053 | ||
1054 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1055 | { | |
4a3adebb | 1056 | struct kvm_msi msi; |
04fa27f5 JK |
1057 | KVMMSIRoute *route; |
1058 | ||
4a3adebb JK |
1059 | if (s->direct_msi) { |
1060 | msi.address_lo = (uint32_t)msg.address; | |
1061 | msi.address_hi = msg.address >> 32; | |
1062 | msi.data = msg.data; | |
1063 | msi.flags = 0; | |
1064 | memset(msi.pad, 0, sizeof(msi.pad)); | |
1065 | ||
1066 | return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi); | |
1067 | } | |
1068 | ||
04fa27f5 JK |
1069 | route = kvm_lookup_msi_route(s, msg); |
1070 | if (!route) { | |
e7b20308 | 1071 | int virq; |
04fa27f5 JK |
1072 | |
1073 | virq = kvm_irqchip_get_virq(s); | |
1074 | if (virq < 0) { | |
1075 | return virq; | |
1076 | } | |
1077 | ||
1078 | route = g_malloc(sizeof(KVMMSIRoute)); | |
1079 | route->kroute.gsi = virq; | |
1080 | route->kroute.type = KVM_IRQ_ROUTING_MSI; | |
1081 | route->kroute.flags = 0; | |
1082 | route->kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1083 | route->kroute.u.msi.address_hi = msg.address >> 32; | |
1084 | route->kroute.u.msi.data = msg.data; | |
1085 | ||
1086 | kvm_add_routing_entry(s, &route->kroute); | |
1087 | ||
1088 | QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route, | |
1089 | entry); | |
04fa27f5 JK |
1090 | } |
1091 | ||
1092 | assert(route->kroute.type == KVM_IRQ_ROUTING_MSI); | |
1093 | ||
3889c3fa | 1094 | return kvm_set_irq(s, route->kroute.gsi, 1); |
04fa27f5 JK |
1095 | } |
1096 | ||
92b4e489 JK |
1097 | int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg) |
1098 | { | |
1099 | struct kvm_irq_routing_entry kroute; | |
1100 | int virq; | |
1101 | ||
1102 | if (!kvm_irqchip_in_kernel()) { | |
1103 | return -ENOSYS; | |
1104 | } | |
1105 | ||
1106 | virq = kvm_irqchip_get_virq(s); | |
1107 | if (virq < 0) { | |
1108 | return virq; | |
1109 | } | |
1110 | ||
1111 | kroute.gsi = virq; | |
1112 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1113 | kroute.flags = 0; | |
1114 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1115 | kroute.u.msi.address_hi = msg.address >> 32; | |
1116 | kroute.u.msi.data = msg.data; | |
1117 | ||
1118 | kvm_add_routing_entry(s, &kroute); | |
1119 | ||
1120 | return virq; | |
1121 | } | |
1122 | ||
39853bbc JK |
1123 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign) |
1124 | { | |
1125 | struct kvm_irqfd irqfd = { | |
1126 | .fd = fd, | |
1127 | .gsi = virq, | |
1128 | .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN, | |
1129 | }; | |
1130 | ||
cc7e0ddf | 1131 | if (!kvm_irqfds_enabled()) { |
39853bbc JK |
1132 | return -ENOSYS; |
1133 | } | |
1134 | ||
1135 | return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd); | |
1136 | } | |
1137 | ||
84b058d7 JK |
1138 | #else /* !KVM_CAP_IRQ_ROUTING */ |
1139 | ||
1140 | static void kvm_init_irq_routing(KVMState *s) | |
1141 | { | |
1142 | } | |
04fa27f5 | 1143 | |
d3d3bef0 JK |
1144 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
1145 | { | |
1146 | } | |
1147 | ||
04fa27f5 JK |
1148 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) |
1149 | { | |
1150 | abort(); | |
1151 | } | |
92b4e489 JK |
1152 | |
1153 | int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg) | |
1154 | { | |
df410675 | 1155 | return -ENOSYS; |
92b4e489 | 1156 | } |
39853bbc JK |
1157 | |
1158 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign) | |
1159 | { | |
1160 | abort(); | |
1161 | } | |
84b058d7 JK |
1162 | #endif /* !KVM_CAP_IRQ_ROUTING */ |
1163 | ||
39853bbc JK |
1164 | int kvm_irqchip_add_irqfd(KVMState *s, int fd, int virq) |
1165 | { | |
1166 | return kvm_irqchip_assign_irqfd(s, fd, virq, true); | |
1167 | } | |
1168 | ||
15b2bd18 PB |
1169 | int kvm_irqchip_add_irq_notifier(KVMState *s, EventNotifier *n, int virq) |
1170 | { | |
1171 | return kvm_irqchip_add_irqfd(s, event_notifier_get_fd(n), virq); | |
1172 | } | |
1173 | ||
39853bbc JK |
1174 | int kvm_irqchip_remove_irqfd(KVMState *s, int fd, int virq) |
1175 | { | |
1176 | return kvm_irqchip_assign_irqfd(s, fd, virq, false); | |
1177 | } | |
1178 | ||
15b2bd18 PB |
1179 | int kvm_irqchip_remove_irq_notifier(KVMState *s, EventNotifier *n, int virq) |
1180 | { | |
1181 | return kvm_irqchip_remove_irqfd(s, event_notifier_get_fd(n), virq); | |
1182 | } | |
1183 | ||
84b058d7 JK |
1184 | static int kvm_irqchip_create(KVMState *s) |
1185 | { | |
1186 | QemuOptsList *list = qemu_find_opts("machine"); | |
1187 | int ret; | |
1188 | ||
1189 | if (QTAILQ_EMPTY(&list->head) || | |
1190 | !qemu_opt_get_bool(QTAILQ_FIRST(&list->head), | |
a24b9106 | 1191 | "kernel_irqchip", true) || |
84b058d7 JK |
1192 | !kvm_check_extension(s, KVM_CAP_IRQCHIP)) { |
1193 | return 0; | |
1194 | } | |
1195 | ||
1196 | ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); | |
1197 | if (ret < 0) { | |
1198 | fprintf(stderr, "Create kernel irqchip failed\n"); | |
1199 | return ret; | |
1200 | } | |
1201 | ||
1202 | s->irqchip_inject_ioctl = KVM_IRQ_LINE; | |
1203 | if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) { | |
1204 | s->irqchip_inject_ioctl = KVM_IRQ_LINE_STATUS; | |
1205 | } | |
3d4b2649 | 1206 | kvm_kernel_irqchip = true; |
7ae26bd4 PM |
1207 | /* If we have an in-kernel IRQ chip then we must have asynchronous |
1208 | * interrupt delivery (though the reverse is not necessarily true) | |
1209 | */ | |
1210 | kvm_async_interrupts_allowed = true; | |
84b058d7 JK |
1211 | |
1212 | kvm_init_irq_routing(s); | |
1213 | ||
1214 | return 0; | |
1215 | } | |
1216 | ||
3ed444e9 DH |
1217 | static int kvm_max_vcpus(KVMState *s) |
1218 | { | |
1219 | int ret; | |
1220 | ||
1221 | /* Find number of supported CPUs using the recommended | |
1222 | * procedure from the kernel API documentation to cope with | |
1223 | * older kernels that may be missing capabilities. | |
1224 | */ | |
1225 | ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS); | |
1226 | if (ret) { | |
1227 | return ret; | |
1228 | } | |
1229 | ret = kvm_check_extension(s, KVM_CAP_NR_VCPUS); | |
1230 | if (ret) { | |
1231 | return ret; | |
1232 | } | |
1233 | ||
1234 | return 4; | |
1235 | } | |
1236 | ||
cad1e282 | 1237 | int kvm_init(void) |
05330448 | 1238 | { |
168ccc11 JK |
1239 | static const char upgrade_note[] = |
1240 | "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" | |
1241 | "(see http://sourceforge.net/projects/kvm).\n"; | |
05330448 | 1242 | KVMState *s; |
94a8d39a | 1243 | const KVMCapabilityInfo *missing_cap; |
05330448 AL |
1244 | int ret; |
1245 | int i; | |
3ed444e9 | 1246 | int max_vcpus; |
05330448 | 1247 | |
7267c094 | 1248 | s = g_malloc0(sizeof(KVMState)); |
05330448 | 1249 | |
3145fcb6 DG |
1250 | /* |
1251 | * On systems where the kernel can support different base page | |
1252 | * sizes, host page size may be different from TARGET_PAGE_SIZE, | |
1253 | * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum | |
1254 | * page size for the system though. | |
1255 | */ | |
1256 | assert(TARGET_PAGE_SIZE <= getpagesize()); | |
1257 | ||
e22a25c9 | 1258 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
72cf2d4f | 1259 | QTAILQ_INIT(&s->kvm_sw_breakpoints); |
e22a25c9 | 1260 | #endif |
a426e122 | 1261 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
05330448 | 1262 | s->slots[i].slot = i; |
a426e122 | 1263 | } |
05330448 | 1264 | s->vmfd = -1; |
40ff6d7e | 1265 | s->fd = qemu_open("/dev/kvm", O_RDWR); |
05330448 AL |
1266 | if (s->fd == -1) { |
1267 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); | |
1268 | ret = -errno; | |
1269 | goto err; | |
1270 | } | |
1271 | ||
1272 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); | |
1273 | if (ret < KVM_API_VERSION) { | |
a426e122 | 1274 | if (ret > 0) { |
05330448 | 1275 | ret = -EINVAL; |
a426e122 | 1276 | } |
05330448 AL |
1277 | fprintf(stderr, "kvm version too old\n"); |
1278 | goto err; | |
1279 | } | |
1280 | ||
1281 | if (ret > KVM_API_VERSION) { | |
1282 | ret = -EINVAL; | |
1283 | fprintf(stderr, "kvm version not supported\n"); | |
1284 | goto err; | |
1285 | } | |
1286 | ||
3ed444e9 DH |
1287 | max_vcpus = kvm_max_vcpus(s); |
1288 | if (smp_cpus > max_vcpus) { | |
1289 | ret = -EINVAL; | |
1290 | fprintf(stderr, "Number of SMP cpus requested (%d) exceeds max cpus " | |
1291 | "supported by KVM (%d)\n", smp_cpus, max_vcpus); | |
1292 | goto err; | |
1293 | } | |
1294 | ||
05330448 | 1295 | s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0); |
0104dcac AG |
1296 | if (s->vmfd < 0) { |
1297 | #ifdef TARGET_S390X | |
1298 | fprintf(stderr, "Please add the 'switch_amode' kernel parameter to " | |
1299 | "your host kernel command line\n"); | |
1300 | #endif | |
db9eae1c | 1301 | ret = s->vmfd; |
05330448 | 1302 | goto err; |
0104dcac | 1303 | } |
05330448 | 1304 | |
94a8d39a JK |
1305 | missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); |
1306 | if (!missing_cap) { | |
1307 | missing_cap = | |
1308 | kvm_check_extension_list(s, kvm_arch_required_capabilities); | |
05330448 | 1309 | } |
94a8d39a | 1310 | if (missing_cap) { |
ad7b8b33 | 1311 | ret = -EINVAL; |
94a8d39a JK |
1312 | fprintf(stderr, "kvm does not support %s\n%s", |
1313 | missing_cap->name, upgrade_note); | |
d85dc283 AL |
1314 | goto err; |
1315 | } | |
1316 | ||
ad7b8b33 | 1317 | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
f65ed4c1 | 1318 | |
e69917e2 | 1319 | s->broken_set_mem_region = 1; |
14a09518 | 1320 | ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS); |
e69917e2 JK |
1321 | if (ret > 0) { |
1322 | s->broken_set_mem_region = 0; | |
1323 | } | |
e69917e2 | 1324 | |
a0fb002c JK |
1325 | #ifdef KVM_CAP_VCPU_EVENTS |
1326 | s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); | |
1327 | #endif | |
1328 | ||
b0b1d690 JK |
1329 | s->robust_singlestep = |
1330 | kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); | |
b0b1d690 | 1331 | |
ff44f1a3 JK |
1332 | #ifdef KVM_CAP_DEBUGREGS |
1333 | s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); | |
1334 | #endif | |
1335 | ||
f1665b21 SY |
1336 | #ifdef KVM_CAP_XSAVE |
1337 | s->xsave = kvm_check_extension(s, KVM_CAP_XSAVE); | |
1338 | #endif | |
1339 | ||
f1665b21 SY |
1340 | #ifdef KVM_CAP_XCRS |
1341 | s->xcrs = kvm_check_extension(s, KVM_CAP_XCRS); | |
1342 | #endif | |
1343 | ||
8a7c7393 JK |
1344 | #ifdef KVM_CAP_PIT_STATE2 |
1345 | s->pit_state2 = kvm_check_extension(s, KVM_CAP_PIT_STATE2); | |
1346 | #endif | |
1347 | ||
d3d3bef0 | 1348 | #ifdef KVM_CAP_IRQ_ROUTING |
4a3adebb | 1349 | s->direct_msi = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0); |
d3d3bef0 | 1350 | #endif |
4a3adebb | 1351 | |
cad1e282 | 1352 | ret = kvm_arch_init(s); |
a426e122 | 1353 | if (ret < 0) { |
05330448 | 1354 | goto err; |
a426e122 | 1355 | } |
05330448 | 1356 | |
84b058d7 JK |
1357 | ret = kvm_irqchip_create(s); |
1358 | if (ret < 0) { | |
1359 | goto err; | |
1360 | } | |
1361 | ||
05330448 | 1362 | kvm_state = s; |
7376e582 | 1363 | memory_listener_register(&kvm_memory_listener, NULL); |
05330448 | 1364 | |
d2f2b8a7 SH |
1365 | s->many_ioeventfds = kvm_check_many_ioeventfds(); |
1366 | ||
aa7f74d1 JK |
1367 | cpu_interrupt_handler = kvm_handle_interrupt; |
1368 | ||
05330448 AL |
1369 | return 0; |
1370 | ||
1371 | err: | |
1372 | if (s) { | |
db9eae1c | 1373 | if (s->vmfd >= 0) { |
05330448 | 1374 | close(s->vmfd); |
a426e122 JK |
1375 | } |
1376 | if (s->fd != -1) { | |
05330448 | 1377 | close(s->fd); |
a426e122 | 1378 | } |
05330448 | 1379 | } |
7267c094 | 1380 | g_free(s); |
05330448 AL |
1381 | |
1382 | return ret; | |
1383 | } | |
1384 | ||
b30e93e9 JK |
1385 | static void kvm_handle_io(uint16_t port, void *data, int direction, int size, |
1386 | uint32_t count) | |
05330448 AL |
1387 | { |
1388 | int i; | |
1389 | uint8_t *ptr = data; | |
1390 | ||
1391 | for (i = 0; i < count; i++) { | |
1392 | if (direction == KVM_EXIT_IO_IN) { | |
1393 | switch (size) { | |
1394 | case 1: | |
afcea8cb | 1395 | stb_p(ptr, cpu_inb(port)); |
05330448 AL |
1396 | break; |
1397 | case 2: | |
afcea8cb | 1398 | stw_p(ptr, cpu_inw(port)); |
05330448 AL |
1399 | break; |
1400 | case 4: | |
afcea8cb | 1401 | stl_p(ptr, cpu_inl(port)); |
05330448 AL |
1402 | break; |
1403 | } | |
1404 | } else { | |
1405 | switch (size) { | |
1406 | case 1: | |
afcea8cb | 1407 | cpu_outb(port, ldub_p(ptr)); |
05330448 AL |
1408 | break; |
1409 | case 2: | |
afcea8cb | 1410 | cpu_outw(port, lduw_p(ptr)); |
05330448 AL |
1411 | break; |
1412 | case 4: | |
afcea8cb | 1413 | cpu_outl(port, ldl_p(ptr)); |
05330448 AL |
1414 | break; |
1415 | } | |
1416 | } | |
1417 | ||
1418 | ptr += size; | |
1419 | } | |
05330448 AL |
1420 | } |
1421 | ||
9349b4f9 | 1422 | static int kvm_handle_internal_error(CPUArchState *env, struct kvm_run *run) |
7c80eef8 | 1423 | { |
bb44e0d1 | 1424 | fprintf(stderr, "KVM internal error."); |
7c80eef8 MT |
1425 | if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) { |
1426 | int i; | |
1427 | ||
bb44e0d1 | 1428 | fprintf(stderr, " Suberror: %d\n", run->internal.suberror); |
7c80eef8 MT |
1429 | for (i = 0; i < run->internal.ndata; ++i) { |
1430 | fprintf(stderr, "extra data[%d]: %"PRIx64"\n", | |
1431 | i, (uint64_t)run->internal.data[i]); | |
1432 | } | |
bb44e0d1 JK |
1433 | } else { |
1434 | fprintf(stderr, "\n"); | |
7c80eef8 | 1435 | } |
7c80eef8 MT |
1436 | if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) { |
1437 | fprintf(stderr, "emulation failure\n"); | |
a426e122 | 1438 | if (!kvm_arch_stop_on_emulation_error(env)) { |
f5c848ee | 1439 | cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE); |
d73cd8f4 | 1440 | return EXCP_INTERRUPT; |
a426e122 | 1441 | } |
7c80eef8 MT |
1442 | } |
1443 | /* FIXME: Should trigger a qmp message to let management know | |
1444 | * something went wrong. | |
1445 | */ | |
73aaec4a | 1446 | return -1; |
7c80eef8 | 1447 | } |
7c80eef8 | 1448 | |
62a2744c | 1449 | void kvm_flush_coalesced_mmio_buffer(void) |
f65ed4c1 | 1450 | { |
f65ed4c1 | 1451 | KVMState *s = kvm_state; |
1cae88b9 AK |
1452 | |
1453 | if (s->coalesced_flush_in_progress) { | |
1454 | return; | |
1455 | } | |
1456 | ||
1457 | s->coalesced_flush_in_progress = true; | |
1458 | ||
62a2744c SY |
1459 | if (s->coalesced_mmio_ring) { |
1460 | struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring; | |
f65ed4c1 AL |
1461 | while (ring->first != ring->last) { |
1462 | struct kvm_coalesced_mmio *ent; | |
1463 | ||
1464 | ent = &ring->coalesced_mmio[ring->first]; | |
1465 | ||
1466 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); | |
85199474 | 1467 | smp_wmb(); |
f65ed4c1 AL |
1468 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; |
1469 | } | |
1470 | } | |
1cae88b9 AK |
1471 | |
1472 | s->coalesced_flush_in_progress = false; | |
f65ed4c1 AL |
1473 | } |
1474 | ||
2705d56a | 1475 | static void do_kvm_cpu_synchronize_state(void *_env) |
4c0960c0 | 1476 | { |
9349b4f9 | 1477 | CPUArchState *env = _env; |
2705d56a | 1478 | |
9ded2744 | 1479 | if (!env->kvm_vcpu_dirty) { |
4c0960c0 | 1480 | kvm_arch_get_registers(env); |
9ded2744 | 1481 | env->kvm_vcpu_dirty = 1; |
4c0960c0 AK |
1482 | } |
1483 | } | |
1484 | ||
9349b4f9 | 1485 | void kvm_cpu_synchronize_state(CPUArchState *env) |
2705d56a | 1486 | { |
a426e122 | 1487 | if (!env->kvm_vcpu_dirty) { |
2705d56a | 1488 | run_on_cpu(env, do_kvm_cpu_synchronize_state, env); |
a426e122 | 1489 | } |
2705d56a JK |
1490 | } |
1491 | ||
9349b4f9 | 1492 | void kvm_cpu_synchronize_post_reset(CPUArchState *env) |
ea375f9a JK |
1493 | { |
1494 | kvm_arch_put_registers(env, KVM_PUT_RESET_STATE); | |
1495 | env->kvm_vcpu_dirty = 0; | |
1496 | } | |
1497 | ||
9349b4f9 | 1498 | void kvm_cpu_synchronize_post_init(CPUArchState *env) |
ea375f9a JK |
1499 | { |
1500 | kvm_arch_put_registers(env, KVM_PUT_FULL_STATE); | |
1501 | env->kvm_vcpu_dirty = 0; | |
1502 | } | |
1503 | ||
9349b4f9 | 1504 | int kvm_cpu_exec(CPUArchState *env) |
05330448 AL |
1505 | { |
1506 | struct kvm_run *run = env->kvm_run; | |
7cbb533f | 1507 | int ret, run_ret; |
05330448 | 1508 | |
8c0d577e | 1509 | DPRINTF("kvm_cpu_exec()\n"); |
05330448 | 1510 | |
99036865 | 1511 | if (kvm_arch_process_async_events(env)) { |
9ccfac9e | 1512 | env->exit_request = 0; |
6792a57b | 1513 | return EXCP_HLT; |
9ccfac9e | 1514 | } |
0af691d7 | 1515 | |
9ccfac9e | 1516 | do { |
9ded2744 | 1517 | if (env->kvm_vcpu_dirty) { |
ea375f9a | 1518 | kvm_arch_put_registers(env, KVM_PUT_RUNTIME_STATE); |
9ded2744 | 1519 | env->kvm_vcpu_dirty = 0; |
4c0960c0 AK |
1520 | } |
1521 | ||
8c14c173 | 1522 | kvm_arch_pre_run(env, run); |
9ccfac9e JK |
1523 | if (env->exit_request) { |
1524 | DPRINTF("interrupt exit requested\n"); | |
1525 | /* | |
1526 | * KVM requires us to reenter the kernel after IO exits to complete | |
1527 | * instruction emulation. This self-signal will ensure that we | |
1528 | * leave ASAP again. | |
1529 | */ | |
1530 | qemu_cpu_kick_self(); | |
1531 | } | |
d549db5a | 1532 | qemu_mutex_unlock_iothread(); |
9ccfac9e | 1533 | |
7cbb533f | 1534 | run_ret = kvm_vcpu_ioctl(env, KVM_RUN, 0); |
9ccfac9e | 1535 | |
d549db5a | 1536 | qemu_mutex_lock_iothread(); |
05330448 AL |
1537 | kvm_arch_post_run(env, run); |
1538 | ||
b0c883b5 JK |
1539 | kvm_flush_coalesced_mmio_buffer(); |
1540 | ||
7cbb533f | 1541 | if (run_ret < 0) { |
dc77d341 JK |
1542 | if (run_ret == -EINTR || run_ret == -EAGAIN) { |
1543 | DPRINTF("io window exit\n"); | |
d73cd8f4 | 1544 | ret = EXCP_INTERRUPT; |
dc77d341 JK |
1545 | break; |
1546 | } | |
7b011fbc ME |
1547 | fprintf(stderr, "error: kvm run failed %s\n", |
1548 | strerror(-run_ret)); | |
05330448 AL |
1549 | abort(); |
1550 | } | |
1551 | ||
05330448 AL |
1552 | switch (run->exit_reason) { |
1553 | case KVM_EXIT_IO: | |
8c0d577e | 1554 | DPRINTF("handle_io\n"); |
b30e93e9 JK |
1555 | kvm_handle_io(run->io.port, |
1556 | (uint8_t *)run + run->io.data_offset, | |
1557 | run->io.direction, | |
1558 | run->io.size, | |
1559 | run->io.count); | |
d73cd8f4 | 1560 | ret = 0; |
05330448 AL |
1561 | break; |
1562 | case KVM_EXIT_MMIO: | |
8c0d577e | 1563 | DPRINTF("handle_mmio\n"); |
05330448 AL |
1564 | cpu_physical_memory_rw(run->mmio.phys_addr, |
1565 | run->mmio.data, | |
1566 | run->mmio.len, | |
1567 | run->mmio.is_write); | |
d73cd8f4 | 1568 | ret = 0; |
05330448 AL |
1569 | break; |
1570 | case KVM_EXIT_IRQ_WINDOW_OPEN: | |
8c0d577e | 1571 | DPRINTF("irq_window_open\n"); |
d73cd8f4 | 1572 | ret = EXCP_INTERRUPT; |
05330448 AL |
1573 | break; |
1574 | case KVM_EXIT_SHUTDOWN: | |
8c0d577e | 1575 | DPRINTF("shutdown\n"); |
05330448 | 1576 | qemu_system_reset_request(); |
d73cd8f4 | 1577 | ret = EXCP_INTERRUPT; |
05330448 AL |
1578 | break; |
1579 | case KVM_EXIT_UNKNOWN: | |
bb44e0d1 JK |
1580 | fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", |
1581 | (uint64_t)run->hw.hardware_exit_reason); | |
73aaec4a | 1582 | ret = -1; |
05330448 | 1583 | break; |
7c80eef8 | 1584 | case KVM_EXIT_INTERNAL_ERROR: |
73aaec4a | 1585 | ret = kvm_handle_internal_error(env, run); |
7c80eef8 | 1586 | break; |
05330448 | 1587 | default: |
8c0d577e | 1588 | DPRINTF("kvm_arch_handle_exit\n"); |
05330448 AL |
1589 | ret = kvm_arch_handle_exit(env, run); |
1590 | break; | |
1591 | } | |
d73cd8f4 | 1592 | } while (ret == 0); |
05330448 | 1593 | |
73aaec4a | 1594 | if (ret < 0) { |
f5c848ee | 1595 | cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE); |
0461d5a6 | 1596 | vm_stop(RUN_STATE_INTERNAL_ERROR); |
becfc390 AL |
1597 | } |
1598 | ||
6792a57b | 1599 | env->exit_request = 0; |
05330448 AL |
1600 | return ret; |
1601 | } | |
1602 | ||
984b5181 | 1603 | int kvm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
1604 | { |
1605 | int ret; | |
984b5181 AL |
1606 | void *arg; |
1607 | va_list ap; | |
05330448 | 1608 | |
984b5181 AL |
1609 | va_start(ap, type); |
1610 | arg = va_arg(ap, void *); | |
1611 | va_end(ap); | |
1612 | ||
1613 | ret = ioctl(s->fd, type, arg); | |
a426e122 | 1614 | if (ret == -1) { |
05330448 | 1615 | ret = -errno; |
a426e122 | 1616 | } |
05330448 AL |
1617 | return ret; |
1618 | } | |
1619 | ||
984b5181 | 1620 | int kvm_vm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
1621 | { |
1622 | int ret; | |
984b5181 AL |
1623 | void *arg; |
1624 | va_list ap; | |
1625 | ||
1626 | va_start(ap, type); | |
1627 | arg = va_arg(ap, void *); | |
1628 | va_end(ap); | |
05330448 | 1629 | |
984b5181 | 1630 | ret = ioctl(s->vmfd, type, arg); |
a426e122 | 1631 | if (ret == -1) { |
05330448 | 1632 | ret = -errno; |
a426e122 | 1633 | } |
05330448 AL |
1634 | return ret; |
1635 | } | |
1636 | ||
9349b4f9 | 1637 | int kvm_vcpu_ioctl(CPUArchState *env, int type, ...) |
05330448 AL |
1638 | { |
1639 | int ret; | |
984b5181 AL |
1640 | void *arg; |
1641 | va_list ap; | |
1642 | ||
1643 | va_start(ap, type); | |
1644 | arg = va_arg(ap, void *); | |
1645 | va_end(ap); | |
05330448 | 1646 | |
984b5181 | 1647 | ret = ioctl(env->kvm_fd, type, arg); |
a426e122 | 1648 | if (ret == -1) { |
05330448 | 1649 | ret = -errno; |
a426e122 | 1650 | } |
05330448 AL |
1651 | return ret; |
1652 | } | |
bd322087 AL |
1653 | |
1654 | int kvm_has_sync_mmu(void) | |
1655 | { | |
94a8d39a | 1656 | return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); |
bd322087 | 1657 | } |
e22a25c9 | 1658 | |
a0fb002c JK |
1659 | int kvm_has_vcpu_events(void) |
1660 | { | |
1661 | return kvm_state->vcpu_events; | |
1662 | } | |
1663 | ||
b0b1d690 JK |
1664 | int kvm_has_robust_singlestep(void) |
1665 | { | |
1666 | return kvm_state->robust_singlestep; | |
1667 | } | |
1668 | ||
ff44f1a3 JK |
1669 | int kvm_has_debugregs(void) |
1670 | { | |
1671 | return kvm_state->debugregs; | |
1672 | } | |
1673 | ||
f1665b21 SY |
1674 | int kvm_has_xsave(void) |
1675 | { | |
1676 | return kvm_state->xsave; | |
1677 | } | |
1678 | ||
1679 | int kvm_has_xcrs(void) | |
1680 | { | |
1681 | return kvm_state->xcrs; | |
1682 | } | |
1683 | ||
8a7c7393 JK |
1684 | int kvm_has_pit_state2(void) |
1685 | { | |
1686 | return kvm_state->pit_state2; | |
1687 | } | |
1688 | ||
d2f2b8a7 SH |
1689 | int kvm_has_many_ioeventfds(void) |
1690 | { | |
1691 | if (!kvm_enabled()) { | |
1692 | return 0; | |
1693 | } | |
1694 | return kvm_state->many_ioeventfds; | |
1695 | } | |
1696 | ||
84b058d7 JK |
1697 | int kvm_has_gsi_routing(void) |
1698 | { | |
a9c5eb0d | 1699 | #ifdef KVM_CAP_IRQ_ROUTING |
84b058d7 | 1700 | return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING); |
a9c5eb0d AG |
1701 | #else |
1702 | return false; | |
1703 | #endif | |
84b058d7 JK |
1704 | } |
1705 | ||
fdec9918 CB |
1706 | void *kvm_vmalloc(ram_addr_t size) |
1707 | { | |
1708 | #ifdef TARGET_S390X | |
1709 | void *mem; | |
1710 | ||
1711 | mem = kvm_arch_vmalloc(size); | |
1712 | if (mem) { | |
1713 | return mem; | |
1714 | } | |
1715 | #endif | |
1716 | return qemu_vmalloc(size); | |
1717 | } | |
1718 | ||
6f0437e8 JK |
1719 | void kvm_setup_guest_memory(void *start, size_t size) |
1720 | { | |
1721 | if (!kvm_has_sync_mmu()) { | |
e78815a5 | 1722 | int ret = qemu_madvise(start, size, QEMU_MADV_DONTFORK); |
6f0437e8 JK |
1723 | |
1724 | if (ret) { | |
e78815a5 AF |
1725 | perror("qemu_madvise"); |
1726 | fprintf(stderr, | |
1727 | "Need MADV_DONTFORK in absence of synchronous KVM MMU\n"); | |
6f0437e8 JK |
1728 | exit(1); |
1729 | } | |
6f0437e8 JK |
1730 | } |
1731 | } | |
1732 | ||
e22a25c9 | 1733 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
9349b4f9 | 1734 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUArchState *env, |
e22a25c9 AL |
1735 | target_ulong pc) |
1736 | { | |
1737 | struct kvm_sw_breakpoint *bp; | |
1738 | ||
72cf2d4f | 1739 | QTAILQ_FOREACH(bp, &env->kvm_state->kvm_sw_breakpoints, entry) { |
a426e122 | 1740 | if (bp->pc == pc) { |
e22a25c9 | 1741 | return bp; |
a426e122 | 1742 | } |
e22a25c9 AL |
1743 | } |
1744 | return NULL; | |
1745 | } | |
1746 | ||
9349b4f9 | 1747 | int kvm_sw_breakpoints_active(CPUArchState *env) |
e22a25c9 | 1748 | { |
72cf2d4f | 1749 | return !QTAILQ_EMPTY(&env->kvm_state->kvm_sw_breakpoints); |
e22a25c9 AL |
1750 | } |
1751 | ||
452e4751 GC |
1752 | struct kvm_set_guest_debug_data { |
1753 | struct kvm_guest_debug dbg; | |
9349b4f9 | 1754 | CPUArchState *env; |
452e4751 GC |
1755 | int err; |
1756 | }; | |
1757 | ||
1758 | static void kvm_invoke_set_guest_debug(void *data) | |
1759 | { | |
1760 | struct kvm_set_guest_debug_data *dbg_data = data; | |
9349b4f9 | 1761 | CPUArchState *env = dbg_data->env; |
b3807725 | 1762 | |
b3807725 | 1763 | dbg_data->err = kvm_vcpu_ioctl(env, KVM_SET_GUEST_DEBUG, &dbg_data->dbg); |
452e4751 GC |
1764 | } |
1765 | ||
9349b4f9 | 1766 | int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap) |
e22a25c9 | 1767 | { |
452e4751 | 1768 | struct kvm_set_guest_debug_data data; |
e22a25c9 | 1769 | |
b0b1d690 | 1770 | data.dbg.control = reinject_trap; |
e22a25c9 | 1771 | |
b0b1d690 JK |
1772 | if (env->singlestep_enabled) { |
1773 | data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; | |
1774 | } | |
452e4751 | 1775 | kvm_arch_update_guest_debug(env, &data.dbg); |
452e4751 | 1776 | data.env = env; |
e22a25c9 | 1777 | |
be41cbe0 | 1778 | run_on_cpu(env, kvm_invoke_set_guest_debug, &data); |
452e4751 | 1779 | return data.err; |
e22a25c9 AL |
1780 | } |
1781 | ||
9349b4f9 | 1782 | int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr, |
e22a25c9 AL |
1783 | target_ulong len, int type) |
1784 | { | |
1785 | struct kvm_sw_breakpoint *bp; | |
9349b4f9 | 1786 | CPUArchState *env; |
e22a25c9 AL |
1787 | int err; |
1788 | ||
1789 | if (type == GDB_BREAKPOINT_SW) { | |
1790 | bp = kvm_find_sw_breakpoint(current_env, addr); | |
1791 | if (bp) { | |
1792 | bp->use_count++; | |
1793 | return 0; | |
1794 | } | |
1795 | ||
7267c094 | 1796 | bp = g_malloc(sizeof(struct kvm_sw_breakpoint)); |
a426e122 | 1797 | if (!bp) { |
e22a25c9 | 1798 | return -ENOMEM; |
a426e122 | 1799 | } |
e22a25c9 AL |
1800 | |
1801 | bp->pc = addr; | |
1802 | bp->use_count = 1; | |
1803 | err = kvm_arch_insert_sw_breakpoint(current_env, bp); | |
1804 | if (err) { | |
7267c094 | 1805 | g_free(bp); |
e22a25c9 AL |
1806 | return err; |
1807 | } | |
1808 | ||
72cf2d4f | 1809 | QTAILQ_INSERT_HEAD(¤t_env->kvm_state->kvm_sw_breakpoints, |
e22a25c9 AL |
1810 | bp, entry); |
1811 | } else { | |
1812 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); | |
a426e122 | 1813 | if (err) { |
e22a25c9 | 1814 | return err; |
a426e122 | 1815 | } |
e22a25c9 AL |
1816 | } |
1817 | ||
1818 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
1819 | err = kvm_update_guest_debug(env, 0); | |
a426e122 | 1820 | if (err) { |
e22a25c9 | 1821 | return err; |
a426e122 | 1822 | } |
e22a25c9 AL |
1823 | } |
1824 | return 0; | |
1825 | } | |
1826 | ||
9349b4f9 | 1827 | int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr, |
e22a25c9 AL |
1828 | target_ulong len, int type) |
1829 | { | |
1830 | struct kvm_sw_breakpoint *bp; | |
9349b4f9 | 1831 | CPUArchState *env; |
e22a25c9 AL |
1832 | int err; |
1833 | ||
1834 | if (type == GDB_BREAKPOINT_SW) { | |
1835 | bp = kvm_find_sw_breakpoint(current_env, addr); | |
a426e122 | 1836 | if (!bp) { |
e22a25c9 | 1837 | return -ENOENT; |
a426e122 | 1838 | } |
e22a25c9 AL |
1839 | |
1840 | if (bp->use_count > 1) { | |
1841 | bp->use_count--; | |
1842 | return 0; | |
1843 | } | |
1844 | ||
1845 | err = kvm_arch_remove_sw_breakpoint(current_env, bp); | |
a426e122 | 1846 | if (err) { |
e22a25c9 | 1847 | return err; |
a426e122 | 1848 | } |
e22a25c9 | 1849 | |
72cf2d4f | 1850 | QTAILQ_REMOVE(¤t_env->kvm_state->kvm_sw_breakpoints, bp, entry); |
7267c094 | 1851 | g_free(bp); |
e22a25c9 AL |
1852 | } else { |
1853 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); | |
a426e122 | 1854 | if (err) { |
e22a25c9 | 1855 | return err; |
a426e122 | 1856 | } |
e22a25c9 AL |
1857 | } |
1858 | ||
1859 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
1860 | err = kvm_update_guest_debug(env, 0); | |
a426e122 | 1861 | if (err) { |
e22a25c9 | 1862 | return err; |
a426e122 | 1863 | } |
e22a25c9 AL |
1864 | } |
1865 | return 0; | |
1866 | } | |
1867 | ||
9349b4f9 | 1868 | void kvm_remove_all_breakpoints(CPUArchState *current_env) |
e22a25c9 AL |
1869 | { |
1870 | struct kvm_sw_breakpoint *bp, *next; | |
1871 | KVMState *s = current_env->kvm_state; | |
9349b4f9 | 1872 | CPUArchState *env; |
e22a25c9 | 1873 | |
72cf2d4f | 1874 | QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
e22a25c9 AL |
1875 | if (kvm_arch_remove_sw_breakpoint(current_env, bp) != 0) { |
1876 | /* Try harder to find a CPU that currently sees the breakpoint. */ | |
1877 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
a426e122 | 1878 | if (kvm_arch_remove_sw_breakpoint(env, bp) == 0) { |
e22a25c9 | 1879 | break; |
a426e122 | 1880 | } |
e22a25c9 AL |
1881 | } |
1882 | } | |
1883 | } | |
1884 | kvm_arch_remove_all_hw_breakpoints(); | |
1885 | ||
a426e122 | 1886 | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
e22a25c9 | 1887 | kvm_update_guest_debug(env, 0); |
a426e122 | 1888 | } |
e22a25c9 AL |
1889 | } |
1890 | ||
1891 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ | |
1892 | ||
9349b4f9 | 1893 | int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap) |
e22a25c9 AL |
1894 | { |
1895 | return -EINVAL; | |
1896 | } | |
1897 | ||
9349b4f9 | 1898 | int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr, |
e22a25c9 AL |
1899 | target_ulong len, int type) |
1900 | { | |
1901 | return -EINVAL; | |
1902 | } | |
1903 | ||
9349b4f9 | 1904 | int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr, |
e22a25c9 AL |
1905 | target_ulong len, int type) |
1906 | { | |
1907 | return -EINVAL; | |
1908 | } | |
1909 | ||
9349b4f9 | 1910 | void kvm_remove_all_breakpoints(CPUArchState *current_env) |
e22a25c9 AL |
1911 | { |
1912 | } | |
1913 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ | |
cc84de95 | 1914 | |
9349b4f9 | 1915 | int kvm_set_signal_mask(CPUArchState *env, const sigset_t *sigset) |
cc84de95 MT |
1916 | { |
1917 | struct kvm_signal_mask *sigmask; | |
1918 | int r; | |
1919 | ||
a426e122 | 1920 | if (!sigset) { |
cc84de95 | 1921 | return kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, NULL); |
a426e122 | 1922 | } |
cc84de95 | 1923 | |
7267c094 | 1924 | sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset)); |
cc84de95 MT |
1925 | |
1926 | sigmask->len = 8; | |
1927 | memcpy(sigmask->sigset, sigset, sizeof(*sigset)); | |
1928 | r = kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, sigmask); | |
7267c094 | 1929 | g_free(sigmask); |
cc84de95 MT |
1930 | |
1931 | return r; | |
1932 | } | |
ca821806 | 1933 | |
4b8f1c88 MT |
1934 | int kvm_set_ioeventfd_mmio(int fd, uint32_t addr, uint32_t val, bool assign, |
1935 | uint32_t size) | |
44f1a3d8 | 1936 | { |
44f1a3d8 CM |
1937 | int ret; |
1938 | struct kvm_ioeventfd iofd; | |
1939 | ||
1940 | iofd.datamatch = val; | |
1941 | iofd.addr = addr; | |
4b8f1c88 | 1942 | iofd.len = size; |
44f1a3d8 CM |
1943 | iofd.flags = KVM_IOEVENTFD_FLAG_DATAMATCH; |
1944 | iofd.fd = fd; | |
1945 | ||
1946 | if (!kvm_enabled()) { | |
1947 | return -ENOSYS; | |
1948 | } | |
1949 | ||
1950 | if (!assign) { | |
1951 | iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
1952 | } | |
1953 | ||
1954 | ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); | |
1955 | ||
1956 | if (ret < 0) { | |
1957 | return -errno; | |
1958 | } | |
1959 | ||
1960 | return 0; | |
44f1a3d8 CM |
1961 | } |
1962 | ||
ca821806 MT |
1963 | int kvm_set_ioeventfd_pio_word(int fd, uint16_t addr, uint16_t val, bool assign) |
1964 | { | |
1965 | struct kvm_ioeventfd kick = { | |
1966 | .datamatch = val, | |
1967 | .addr = addr, | |
1968 | .len = 2, | |
1969 | .flags = KVM_IOEVENTFD_FLAG_DATAMATCH | KVM_IOEVENTFD_FLAG_PIO, | |
1970 | .fd = fd, | |
1971 | }; | |
1972 | int r; | |
a426e122 | 1973 | if (!kvm_enabled()) { |
ca821806 | 1974 | return -ENOSYS; |
a426e122 JK |
1975 | } |
1976 | if (!assign) { | |
ca821806 | 1977 | kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; |
a426e122 | 1978 | } |
ca821806 | 1979 | r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); |
a426e122 | 1980 | if (r < 0) { |
ca821806 | 1981 | return r; |
a426e122 | 1982 | } |
ca821806 | 1983 | return 0; |
98c8573e | 1984 | } |
a1b87fe0 | 1985 | |
9349b4f9 | 1986 | int kvm_on_sigbus_vcpu(CPUArchState *env, int code, void *addr) |
a1b87fe0 JK |
1987 | { |
1988 | return kvm_arch_on_sigbus_vcpu(env, code, addr); | |
1989 | } | |
1990 | ||
1991 | int kvm_on_sigbus(int code, void *addr) | |
1992 | { | |
1993 | return kvm_arch_on_sigbus(code, addr); | |
1994 | } |