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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" |
05330448 | 25 | #include "sysemu.h" |
d33a1810 | 26 | #include "hw/hw.h" |
04fa27f5 | 27 | #include "hw/msi.h" |
e22a25c9 | 28 | #include "gdbstub.h" |
05330448 | 29 | #include "kvm.h" |
8369e01c | 30 | #include "bswap.h" |
a01672d3 | 31 | #include "memory.h" |
80a1ea37 | 32 | #include "exec-memory.h" |
05330448 | 33 | |
d2f2b8a7 SH |
34 | /* This check must be after config-host.h is included */ |
35 | #ifdef CONFIG_EVENTFD | |
36 | #include <sys/eventfd.h> | |
37 | #endif | |
38 | ||
93148aa5 | 39 | /* KVM uses PAGE_SIZE in its definition of COALESCED_MMIO_MAX */ |
f65ed4c1 AL |
40 | #define PAGE_SIZE TARGET_PAGE_SIZE |
41 | ||
05330448 AL |
42 | //#define DEBUG_KVM |
43 | ||
44 | #ifdef DEBUG_KVM | |
8c0d577e | 45 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
46 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
47 | #else | |
8c0d577e | 48 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
49 | do { } while (0) |
50 | #endif | |
51 | ||
04fa27f5 JK |
52 | #define KVM_MSI_HASHTAB_SIZE 256 |
53 | ||
34fc643f AL |
54 | typedef struct KVMSlot |
55 | { | |
c227f099 AL |
56 | target_phys_addr_t start_addr; |
57 | ram_addr_t memory_size; | |
9f213ed9 | 58 | void *ram; |
34fc643f AL |
59 | int slot; |
60 | int flags; | |
61 | } KVMSlot; | |
05330448 | 62 | |
5832d1f2 AL |
63 | typedef struct kvm_dirty_log KVMDirtyLog; |
64 | ||
04fa27f5 JK |
65 | typedef struct KVMMSIRoute { |
66 | struct kvm_irq_routing_entry kroute; | |
67 | QTAILQ_ENTRY(KVMMSIRoute) entry; | |
68 | } KVMMSIRoute; | |
69 | ||
05330448 AL |
70 | struct KVMState |
71 | { | |
72 | KVMSlot slots[32]; | |
73 | int fd; | |
74 | int vmfd; | |
f65ed4c1 | 75 | int coalesced_mmio; |
62a2744c | 76 | struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; |
1cae88b9 | 77 | bool coalesced_flush_in_progress; |
e69917e2 | 78 | int broken_set_mem_region; |
4495d6a7 | 79 | int migration_log; |
a0fb002c | 80 | int vcpu_events; |
b0b1d690 | 81 | int robust_singlestep; |
ff44f1a3 | 82 | int debugregs; |
e22a25c9 AL |
83 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
84 | struct kvm_sw_breakpoint_head kvm_sw_breakpoints; | |
85 | #endif | |
8a7c7393 | 86 | int pit_state2; |
f1665b21 | 87 | int xsave, xcrs; |
d2f2b8a7 | 88 | int many_ioeventfds; |
92e4b519 DG |
89 | /* The man page (and posix) say ioctl numbers are signed int, but |
90 | * they're not. Linux, glibc and *BSD all treat ioctl numbers as | |
91 | * unsigned, and treating them as signed here can break things */ | |
92 | unsigned irqchip_inject_ioctl; | |
84b058d7 JK |
93 | #ifdef KVM_CAP_IRQ_ROUTING |
94 | struct kvm_irq_routing *irq_routes; | |
95 | int nr_allocated_irq_routes; | |
96 | uint32_t *used_gsi_bitmap; | |
4e2e4e63 | 97 | unsigned int gsi_count; |
04fa27f5 | 98 | QTAILQ_HEAD(msi_hashtab, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE]; |
84b058d7 | 99 | #endif |
05330448 AL |
100 | }; |
101 | ||
6a7af8cb | 102 | KVMState *kvm_state; |
3d4b2649 | 103 | bool kvm_kernel_irqchip; |
05330448 | 104 | |
94a8d39a JK |
105 | static const KVMCapabilityInfo kvm_required_capabilites[] = { |
106 | KVM_CAP_INFO(USER_MEMORY), | |
107 | KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS), | |
108 | KVM_CAP_LAST_INFO | |
109 | }; | |
110 | ||
05330448 AL |
111 | static KVMSlot *kvm_alloc_slot(KVMState *s) |
112 | { | |
113 | int i; | |
114 | ||
115 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
a426e122 | 116 | if (s->slots[i].memory_size == 0) { |
05330448 | 117 | return &s->slots[i]; |
a426e122 | 118 | } |
05330448 AL |
119 | } |
120 | ||
d3f8d37f AL |
121 | fprintf(stderr, "%s: no free slot available\n", __func__); |
122 | abort(); | |
123 | } | |
124 | ||
125 | static KVMSlot *kvm_lookup_matching_slot(KVMState *s, | |
c227f099 AL |
126 | target_phys_addr_t start_addr, |
127 | target_phys_addr_t end_addr) | |
d3f8d37f AL |
128 | { |
129 | int i; | |
130 | ||
131 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
132 | KVMSlot *mem = &s->slots[i]; | |
133 | ||
134 | if (start_addr == mem->start_addr && | |
135 | end_addr == mem->start_addr + mem->memory_size) { | |
136 | return mem; | |
137 | } | |
138 | } | |
139 | ||
05330448 AL |
140 | return NULL; |
141 | } | |
142 | ||
6152e2ae AL |
143 | /* |
144 | * Find overlapping slot with lowest start address | |
145 | */ | |
146 | static KVMSlot *kvm_lookup_overlapping_slot(KVMState *s, | |
c227f099 AL |
147 | target_phys_addr_t start_addr, |
148 | target_phys_addr_t end_addr) | |
05330448 | 149 | { |
6152e2ae | 150 | KVMSlot *found = NULL; |
05330448 AL |
151 | int i; |
152 | ||
153 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
154 | KVMSlot *mem = &s->slots[i]; | |
155 | ||
6152e2ae AL |
156 | if (mem->memory_size == 0 || |
157 | (found && found->start_addr < mem->start_addr)) { | |
158 | continue; | |
159 | } | |
160 | ||
161 | if (end_addr > mem->start_addr && | |
162 | start_addr < mem->start_addr + mem->memory_size) { | |
163 | found = mem; | |
164 | } | |
05330448 AL |
165 | } |
166 | ||
6152e2ae | 167 | return found; |
05330448 AL |
168 | } |
169 | ||
9f213ed9 AK |
170 | int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, |
171 | target_phys_addr_t *phys_addr) | |
983dfc3b HY |
172 | { |
173 | int i; | |
174 | ||
175 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
176 | KVMSlot *mem = &s->slots[i]; | |
177 | ||
9f213ed9 AK |
178 | if (ram >= mem->ram && ram < mem->ram + mem->memory_size) { |
179 | *phys_addr = mem->start_addr + (ram - mem->ram); | |
983dfc3b HY |
180 | return 1; |
181 | } | |
182 | } | |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
5832d1f2 AL |
187 | static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot) |
188 | { | |
189 | struct kvm_userspace_memory_region mem; | |
190 | ||
191 | mem.slot = slot->slot; | |
192 | mem.guest_phys_addr = slot->start_addr; | |
193 | mem.memory_size = slot->memory_size; | |
9f213ed9 | 194 | mem.userspace_addr = (unsigned long)slot->ram; |
5832d1f2 | 195 | mem.flags = slot->flags; |
4495d6a7 JK |
196 | if (s->migration_log) { |
197 | mem.flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
198 | } | |
5832d1f2 AL |
199 | return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); |
200 | } | |
201 | ||
8d2ba1fb JK |
202 | static void kvm_reset_vcpu(void *opaque) |
203 | { | |
9349b4f9 | 204 | CPUArchState *env = opaque; |
8d2ba1fb | 205 | |
caa5af0f | 206 | kvm_arch_reset_vcpu(env); |
8d2ba1fb | 207 | } |
5832d1f2 | 208 | |
9349b4f9 | 209 | int kvm_init_vcpu(CPUArchState *env) |
05330448 AL |
210 | { |
211 | KVMState *s = kvm_state; | |
212 | long mmap_size; | |
213 | int ret; | |
214 | ||
8c0d577e | 215 | DPRINTF("kvm_init_vcpu\n"); |
05330448 | 216 | |
984b5181 | 217 | ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, env->cpu_index); |
05330448 | 218 | if (ret < 0) { |
8c0d577e | 219 | DPRINTF("kvm_create_vcpu failed\n"); |
05330448 AL |
220 | goto err; |
221 | } | |
222 | ||
223 | env->kvm_fd = ret; | |
224 | env->kvm_state = s; | |
d841b6c4 | 225 | env->kvm_vcpu_dirty = 1; |
05330448 AL |
226 | |
227 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
228 | if (mmap_size < 0) { | |
748a680b | 229 | ret = mmap_size; |
8c0d577e | 230 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); |
05330448 AL |
231 | goto err; |
232 | } | |
233 | ||
234 | env->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, | |
235 | env->kvm_fd, 0); | |
236 | if (env->kvm_run == MAP_FAILED) { | |
237 | ret = -errno; | |
8c0d577e | 238 | DPRINTF("mmap'ing vcpu state failed\n"); |
05330448 AL |
239 | goto err; |
240 | } | |
241 | ||
a426e122 JK |
242 | if (s->coalesced_mmio && !s->coalesced_mmio_ring) { |
243 | s->coalesced_mmio_ring = | |
244 | (void *)env->kvm_run + s->coalesced_mmio * PAGE_SIZE; | |
245 | } | |
62a2744c | 246 | |
05330448 | 247 | ret = kvm_arch_init_vcpu(env); |
8d2ba1fb | 248 | if (ret == 0) { |
a08d4367 | 249 | qemu_register_reset(kvm_reset_vcpu, env); |
caa5af0f | 250 | kvm_arch_reset_vcpu(env); |
8d2ba1fb | 251 | } |
05330448 AL |
252 | err: |
253 | return ret; | |
254 | } | |
255 | ||
5832d1f2 AL |
256 | /* |
257 | * dirty pages logging control | |
258 | */ | |
25254bbc MT |
259 | |
260 | static int kvm_mem_flags(KVMState *s, bool log_dirty) | |
261 | { | |
262 | return log_dirty ? KVM_MEM_LOG_DIRTY_PAGES : 0; | |
263 | } | |
264 | ||
265 | static int kvm_slot_dirty_pages_log_change(KVMSlot *mem, bool log_dirty) | |
5832d1f2 AL |
266 | { |
267 | KVMState *s = kvm_state; | |
25254bbc | 268 | int flags, mask = KVM_MEM_LOG_DIRTY_PAGES; |
4495d6a7 JK |
269 | int old_flags; |
270 | ||
4495d6a7 | 271 | old_flags = mem->flags; |
5832d1f2 | 272 | |
25254bbc | 273 | flags = (mem->flags & ~mask) | kvm_mem_flags(s, log_dirty); |
5832d1f2 AL |
274 | mem->flags = flags; |
275 | ||
4495d6a7 JK |
276 | /* If nothing changed effectively, no need to issue ioctl */ |
277 | if (s->migration_log) { | |
278 | flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
279 | } | |
25254bbc | 280 | |
4495d6a7 | 281 | if (flags == old_flags) { |
25254bbc | 282 | return 0; |
4495d6a7 JK |
283 | } |
284 | ||
5832d1f2 AL |
285 | return kvm_set_user_memory_region(s, mem); |
286 | } | |
287 | ||
25254bbc MT |
288 | static int kvm_dirty_pages_log_change(target_phys_addr_t phys_addr, |
289 | ram_addr_t size, bool log_dirty) | |
290 | { | |
291 | KVMState *s = kvm_state; | |
292 | KVMSlot *mem = kvm_lookup_matching_slot(s, phys_addr, phys_addr + size); | |
293 | ||
294 | if (mem == NULL) { | |
295 | fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-" | |
296 | TARGET_FMT_plx "\n", __func__, phys_addr, | |
297 | (target_phys_addr_t)(phys_addr + size - 1)); | |
298 | return -EINVAL; | |
299 | } | |
300 | return kvm_slot_dirty_pages_log_change(mem, log_dirty); | |
301 | } | |
302 | ||
a01672d3 AK |
303 | static void kvm_log_start(MemoryListener *listener, |
304 | MemoryRegionSection *section) | |
5832d1f2 | 305 | { |
a01672d3 AK |
306 | int r; |
307 | ||
308 | r = kvm_dirty_pages_log_change(section->offset_within_address_space, | |
309 | section->size, true); | |
310 | if (r < 0) { | |
311 | abort(); | |
312 | } | |
5832d1f2 AL |
313 | } |
314 | ||
a01672d3 AK |
315 | static void kvm_log_stop(MemoryListener *listener, |
316 | MemoryRegionSection *section) | |
5832d1f2 | 317 | { |
a01672d3 AK |
318 | int r; |
319 | ||
320 | r = kvm_dirty_pages_log_change(section->offset_within_address_space, | |
321 | section->size, false); | |
322 | if (r < 0) { | |
323 | abort(); | |
324 | } | |
5832d1f2 AL |
325 | } |
326 | ||
7b8f3b78 | 327 | static int kvm_set_migration_log(int enable) |
4495d6a7 JK |
328 | { |
329 | KVMState *s = kvm_state; | |
330 | KVMSlot *mem; | |
331 | int i, err; | |
332 | ||
333 | s->migration_log = enable; | |
334 | ||
335 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { | |
336 | mem = &s->slots[i]; | |
337 | ||
70fedd76 AW |
338 | if (!mem->memory_size) { |
339 | continue; | |
340 | } | |
4495d6a7 JK |
341 | if (!!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) == enable) { |
342 | continue; | |
343 | } | |
344 | err = kvm_set_user_memory_region(s, mem); | |
345 | if (err) { | |
346 | return err; | |
347 | } | |
348 | } | |
349 | return 0; | |
350 | } | |
351 | ||
8369e01c | 352 | /* get kvm's dirty pages bitmap and update qemu's */ |
ffcde12f AK |
353 | static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section, |
354 | unsigned long *bitmap) | |
96c1606b | 355 | { |
8369e01c | 356 | unsigned int i, j; |
aa90fec7 BH |
357 | unsigned long page_number, c; |
358 | target_phys_addr_t addr, addr1; | |
ffcde12f | 359 | unsigned int len = ((section->size / TARGET_PAGE_SIZE) + HOST_LONG_BITS - 1) / HOST_LONG_BITS; |
3145fcb6 | 360 | unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE; |
8369e01c MT |
361 | |
362 | /* | |
363 | * bitmap-traveling is faster than memory-traveling (for addr...) | |
364 | * especially when most of the memory is not dirty. | |
365 | */ | |
366 | for (i = 0; i < len; i++) { | |
367 | if (bitmap[i] != 0) { | |
368 | c = leul_to_cpu(bitmap[i]); | |
369 | do { | |
370 | j = ffsl(c) - 1; | |
371 | c &= ~(1ul << j); | |
3145fcb6 | 372 | page_number = (i * HOST_LONG_BITS + j) * hpratio; |
8369e01c | 373 | addr1 = page_number * TARGET_PAGE_SIZE; |
ffcde12f | 374 | addr = section->offset_within_region + addr1; |
3145fcb6 DG |
375 | memory_region_set_dirty(section->mr, addr, |
376 | TARGET_PAGE_SIZE * hpratio); | |
8369e01c MT |
377 | } while (c != 0); |
378 | } | |
379 | } | |
380 | return 0; | |
96c1606b AG |
381 | } |
382 | ||
8369e01c MT |
383 | #define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) |
384 | ||
5832d1f2 AL |
385 | /** |
386 | * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space | |
fd4aa979 BS |
387 | * This function updates qemu's dirty bitmap using |
388 | * memory_region_set_dirty(). This means all bits are set | |
389 | * to dirty. | |
5832d1f2 | 390 | * |
d3f8d37f | 391 | * @start_add: start of logged region. |
5832d1f2 AL |
392 | * @end_addr: end of logged region. |
393 | */ | |
ffcde12f | 394 | static int kvm_physical_sync_dirty_bitmap(MemoryRegionSection *section) |
5832d1f2 AL |
395 | { |
396 | KVMState *s = kvm_state; | |
151f7749 | 397 | unsigned long size, allocated_size = 0; |
151f7749 JK |
398 | KVMDirtyLog d; |
399 | KVMSlot *mem; | |
400 | int ret = 0; | |
ffcde12f AK |
401 | target_phys_addr_t start_addr = section->offset_within_address_space; |
402 | target_phys_addr_t end_addr = start_addr + section->size; | |
5832d1f2 | 403 | |
151f7749 JK |
404 | d.dirty_bitmap = NULL; |
405 | while (start_addr < end_addr) { | |
406 | mem = kvm_lookup_overlapping_slot(s, start_addr, end_addr); | |
407 | if (mem == NULL) { | |
408 | break; | |
409 | } | |
5832d1f2 | 410 | |
51b0c606 MT |
411 | /* XXX bad kernel interface alert |
412 | * For dirty bitmap, kernel allocates array of size aligned to | |
413 | * bits-per-long. But for case when the kernel is 64bits and | |
414 | * the userspace is 32bits, userspace can't align to the same | |
415 | * bits-per-long, since sizeof(long) is different between kernel | |
416 | * and user space. This way, userspace will provide buffer which | |
417 | * may be 4 bytes less than the kernel will use, resulting in | |
418 | * userspace memory corruption (which is not detectable by valgrind | |
419 | * too, in most cases). | |
420 | * So for now, let's align to 64 instead of HOST_LONG_BITS here, in | |
421 | * a hope that sizeof(long) wont become >8 any time soon. | |
422 | */ | |
423 | size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), | |
424 | /*HOST_LONG_BITS*/ 64) / 8; | |
151f7749 | 425 | if (!d.dirty_bitmap) { |
7267c094 | 426 | d.dirty_bitmap = g_malloc(size); |
151f7749 | 427 | } else if (size > allocated_size) { |
7267c094 | 428 | d.dirty_bitmap = g_realloc(d.dirty_bitmap, size); |
151f7749 JK |
429 | } |
430 | allocated_size = size; | |
431 | memset(d.dirty_bitmap, 0, allocated_size); | |
5832d1f2 | 432 | |
151f7749 | 433 | d.slot = mem->slot; |
5832d1f2 | 434 | |
6e489f3f | 435 | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { |
8c0d577e | 436 | DPRINTF("ioctl failed %d\n", errno); |
151f7749 JK |
437 | ret = -1; |
438 | break; | |
439 | } | |
5832d1f2 | 440 | |
ffcde12f | 441 | kvm_get_dirty_pages_log_range(section, d.dirty_bitmap); |
8369e01c | 442 | start_addr = mem->start_addr + mem->memory_size; |
5832d1f2 | 443 | } |
7267c094 | 444 | g_free(d.dirty_bitmap); |
151f7749 JK |
445 | |
446 | return ret; | |
5832d1f2 AL |
447 | } |
448 | ||
c227f099 | 449 | int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size) |
f65ed4c1 AL |
450 | { |
451 | int ret = -ENOSYS; | |
f65ed4c1 AL |
452 | KVMState *s = kvm_state; |
453 | ||
454 | if (s->coalesced_mmio) { | |
455 | struct kvm_coalesced_mmio_zone zone; | |
456 | ||
457 | zone.addr = start; | |
458 | zone.size = size; | |
7e680753 | 459 | zone.pad = 0; |
f65ed4c1 AL |
460 | |
461 | ret = kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); | |
462 | } | |
f65ed4c1 AL |
463 | |
464 | return ret; | |
465 | } | |
466 | ||
c227f099 | 467 | int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size) |
f65ed4c1 AL |
468 | { |
469 | int ret = -ENOSYS; | |
f65ed4c1 AL |
470 | KVMState *s = kvm_state; |
471 | ||
472 | if (s->coalesced_mmio) { | |
473 | struct kvm_coalesced_mmio_zone zone; | |
474 | ||
475 | zone.addr = start; | |
476 | zone.size = size; | |
7e680753 | 477 | zone.pad = 0; |
f65ed4c1 AL |
478 | |
479 | ret = kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); | |
480 | } | |
f65ed4c1 AL |
481 | |
482 | return ret; | |
483 | } | |
484 | ||
ad7b8b33 AL |
485 | int kvm_check_extension(KVMState *s, unsigned int extension) |
486 | { | |
487 | int ret; | |
488 | ||
489 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
490 | if (ret < 0) { | |
491 | ret = 0; | |
492 | } | |
493 | ||
494 | return ret; | |
495 | } | |
496 | ||
d2f2b8a7 SH |
497 | static int kvm_check_many_ioeventfds(void) |
498 | { | |
d0dcac83 SH |
499 | /* Userspace can use ioeventfd for io notification. This requires a host |
500 | * that supports eventfd(2) and an I/O thread; since eventfd does not | |
501 | * support SIGIO it cannot interrupt the vcpu. | |
502 | * | |
503 | * Older kernels have a 6 device limit on the KVM io bus. Find out so we | |
d2f2b8a7 SH |
504 | * can avoid creating too many ioeventfds. |
505 | */ | |
12d4536f | 506 | #if defined(CONFIG_EVENTFD) |
d2f2b8a7 SH |
507 | int ioeventfds[7]; |
508 | int i, ret = 0; | |
509 | for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { | |
510 | ioeventfds[i] = eventfd(0, EFD_CLOEXEC); | |
511 | if (ioeventfds[i] < 0) { | |
512 | break; | |
513 | } | |
514 | ret = kvm_set_ioeventfd_pio_word(ioeventfds[i], 0, i, true); | |
515 | if (ret < 0) { | |
516 | close(ioeventfds[i]); | |
517 | break; | |
518 | } | |
519 | } | |
520 | ||
521 | /* Decide whether many devices are supported or not */ | |
522 | ret = i == ARRAY_SIZE(ioeventfds); | |
523 | ||
524 | while (i-- > 0) { | |
525 | kvm_set_ioeventfd_pio_word(ioeventfds[i], 0, i, false); | |
526 | close(ioeventfds[i]); | |
527 | } | |
528 | return ret; | |
529 | #else | |
530 | return 0; | |
531 | #endif | |
532 | } | |
533 | ||
94a8d39a JK |
534 | static const KVMCapabilityInfo * |
535 | kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list) | |
536 | { | |
537 | while (list->name) { | |
538 | if (!kvm_check_extension(s, list->value)) { | |
539 | return list; | |
540 | } | |
541 | list++; | |
542 | } | |
543 | return NULL; | |
544 | } | |
545 | ||
a01672d3 | 546 | static void kvm_set_phys_mem(MemoryRegionSection *section, bool add) |
46dbef6a MT |
547 | { |
548 | KVMState *s = kvm_state; | |
46dbef6a MT |
549 | KVMSlot *mem, old; |
550 | int err; | |
a01672d3 AK |
551 | MemoryRegion *mr = section->mr; |
552 | bool log_dirty = memory_region_is_logging(mr); | |
553 | target_phys_addr_t start_addr = section->offset_within_address_space; | |
554 | ram_addr_t size = section->size; | |
9f213ed9 | 555 | void *ram = NULL; |
8f6f962b | 556 | unsigned delta; |
46dbef6a | 557 | |
14542fea GN |
558 | /* kvm works in page size chunks, but the function may be called |
559 | with sub-page size and unaligned start address. */ | |
8f6f962b AK |
560 | delta = TARGET_PAGE_ALIGN(size) - size; |
561 | if (delta > size) { | |
562 | return; | |
563 | } | |
564 | start_addr += delta; | |
565 | size -= delta; | |
566 | size &= TARGET_PAGE_MASK; | |
567 | if (!size || (start_addr & ~TARGET_PAGE_MASK)) { | |
568 | return; | |
569 | } | |
46dbef6a | 570 | |
a01672d3 AK |
571 | if (!memory_region_is_ram(mr)) { |
572 | return; | |
9f213ed9 AK |
573 | } |
574 | ||
8f6f962b | 575 | ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + delta; |
a01672d3 | 576 | |
46dbef6a MT |
577 | while (1) { |
578 | mem = kvm_lookup_overlapping_slot(s, start_addr, start_addr + size); | |
579 | if (!mem) { | |
580 | break; | |
581 | } | |
582 | ||
a01672d3 | 583 | if (add && start_addr >= mem->start_addr && |
46dbef6a | 584 | (start_addr + size <= mem->start_addr + mem->memory_size) && |
9f213ed9 | 585 | (ram - start_addr == mem->ram - mem->start_addr)) { |
46dbef6a | 586 | /* The new slot fits into the existing one and comes with |
25254bbc MT |
587 | * identical parameters - update flags and done. */ |
588 | kvm_slot_dirty_pages_log_change(mem, log_dirty); | |
46dbef6a MT |
589 | return; |
590 | } | |
591 | ||
592 | old = *mem; | |
593 | ||
3fbffb62 AK |
594 | if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { |
595 | kvm_physical_sync_dirty_bitmap(section); | |
596 | } | |
597 | ||
46dbef6a MT |
598 | /* unregister the overlapping slot */ |
599 | mem->memory_size = 0; | |
600 | err = kvm_set_user_memory_region(s, mem); | |
601 | if (err) { | |
602 | fprintf(stderr, "%s: error unregistering overlapping slot: %s\n", | |
603 | __func__, strerror(-err)); | |
604 | abort(); | |
605 | } | |
606 | ||
607 | /* Workaround for older KVM versions: we can't join slots, even not by | |
608 | * unregistering the previous ones and then registering the larger | |
609 | * slot. We have to maintain the existing fragmentation. Sigh. | |
610 | * | |
611 | * This workaround assumes that the new slot starts at the same | |
612 | * address as the first existing one. If not or if some overlapping | |
613 | * slot comes around later, we will fail (not seen in practice so far) | |
614 | * - and actually require a recent KVM version. */ | |
615 | if (s->broken_set_mem_region && | |
a01672d3 | 616 | old.start_addr == start_addr && old.memory_size < size && add) { |
46dbef6a MT |
617 | mem = kvm_alloc_slot(s); |
618 | mem->memory_size = old.memory_size; | |
619 | mem->start_addr = old.start_addr; | |
9f213ed9 | 620 | mem->ram = old.ram; |
25254bbc | 621 | mem->flags = kvm_mem_flags(s, log_dirty); |
46dbef6a MT |
622 | |
623 | err = kvm_set_user_memory_region(s, mem); | |
624 | if (err) { | |
625 | fprintf(stderr, "%s: error updating slot: %s\n", __func__, | |
626 | strerror(-err)); | |
627 | abort(); | |
628 | } | |
629 | ||
630 | start_addr += old.memory_size; | |
9f213ed9 | 631 | ram += old.memory_size; |
46dbef6a MT |
632 | size -= old.memory_size; |
633 | continue; | |
634 | } | |
635 | ||
636 | /* register prefix slot */ | |
637 | if (old.start_addr < start_addr) { | |
638 | mem = kvm_alloc_slot(s); | |
639 | mem->memory_size = start_addr - old.start_addr; | |
640 | mem->start_addr = old.start_addr; | |
9f213ed9 | 641 | mem->ram = old.ram; |
25254bbc | 642 | mem->flags = kvm_mem_flags(s, log_dirty); |
46dbef6a MT |
643 | |
644 | err = kvm_set_user_memory_region(s, mem); | |
645 | if (err) { | |
646 | fprintf(stderr, "%s: error registering prefix slot: %s\n", | |
647 | __func__, strerror(-err)); | |
d4d6868f AG |
648 | #ifdef TARGET_PPC |
649 | fprintf(stderr, "%s: This is probably because your kernel's " \ | |
650 | "PAGE_SIZE is too big. Please try to use 4k " \ | |
651 | "PAGE_SIZE!\n", __func__); | |
652 | #endif | |
46dbef6a MT |
653 | abort(); |
654 | } | |
655 | } | |
656 | ||
657 | /* register suffix slot */ | |
658 | if (old.start_addr + old.memory_size > start_addr + size) { | |
659 | ram_addr_t size_delta; | |
660 | ||
661 | mem = kvm_alloc_slot(s); | |
662 | mem->start_addr = start_addr + size; | |
663 | size_delta = mem->start_addr - old.start_addr; | |
664 | mem->memory_size = old.memory_size - size_delta; | |
9f213ed9 | 665 | mem->ram = old.ram + size_delta; |
25254bbc | 666 | mem->flags = kvm_mem_flags(s, log_dirty); |
46dbef6a MT |
667 | |
668 | err = kvm_set_user_memory_region(s, mem); | |
669 | if (err) { | |
670 | fprintf(stderr, "%s: error registering suffix slot: %s\n", | |
671 | __func__, strerror(-err)); | |
672 | abort(); | |
673 | } | |
674 | } | |
675 | } | |
676 | ||
677 | /* in case the KVM bug workaround already "consumed" the new slot */ | |
a426e122 | 678 | if (!size) { |
46dbef6a | 679 | return; |
a426e122 | 680 | } |
a01672d3 | 681 | if (!add) { |
46dbef6a | 682 | return; |
a426e122 | 683 | } |
46dbef6a MT |
684 | mem = kvm_alloc_slot(s); |
685 | mem->memory_size = size; | |
686 | mem->start_addr = start_addr; | |
9f213ed9 | 687 | mem->ram = ram; |
25254bbc | 688 | mem->flags = kvm_mem_flags(s, log_dirty); |
46dbef6a MT |
689 | |
690 | err = kvm_set_user_memory_region(s, mem); | |
691 | if (err) { | |
692 | fprintf(stderr, "%s: error registering slot: %s\n", __func__, | |
693 | strerror(-err)); | |
694 | abort(); | |
695 | } | |
696 | } | |
697 | ||
50c1e149 AK |
698 | static void kvm_begin(MemoryListener *listener) |
699 | { | |
700 | } | |
701 | ||
702 | static void kvm_commit(MemoryListener *listener) | |
703 | { | |
704 | } | |
705 | ||
a01672d3 AK |
706 | static void kvm_region_add(MemoryListener *listener, |
707 | MemoryRegionSection *section) | |
708 | { | |
709 | kvm_set_phys_mem(section, true); | |
710 | } | |
711 | ||
712 | static void kvm_region_del(MemoryListener *listener, | |
713 | MemoryRegionSection *section) | |
714 | { | |
715 | kvm_set_phys_mem(section, false); | |
716 | } | |
717 | ||
50c1e149 AK |
718 | static void kvm_region_nop(MemoryListener *listener, |
719 | MemoryRegionSection *section) | |
720 | { | |
721 | } | |
722 | ||
a01672d3 AK |
723 | static void kvm_log_sync(MemoryListener *listener, |
724 | MemoryRegionSection *section) | |
7b8f3b78 | 725 | { |
a01672d3 AK |
726 | int r; |
727 | ||
ffcde12f | 728 | r = kvm_physical_sync_dirty_bitmap(section); |
a01672d3 AK |
729 | if (r < 0) { |
730 | abort(); | |
731 | } | |
7b8f3b78 MT |
732 | } |
733 | ||
a01672d3 | 734 | static void kvm_log_global_start(struct MemoryListener *listener) |
7b8f3b78 | 735 | { |
a01672d3 AK |
736 | int r; |
737 | ||
738 | r = kvm_set_migration_log(1); | |
739 | assert(r >= 0); | |
7b8f3b78 MT |
740 | } |
741 | ||
a01672d3 | 742 | static void kvm_log_global_stop(struct MemoryListener *listener) |
7b8f3b78 | 743 | { |
a01672d3 AK |
744 | int r; |
745 | ||
746 | r = kvm_set_migration_log(0); | |
747 | assert(r >= 0); | |
7b8f3b78 MT |
748 | } |
749 | ||
80a1ea37 AK |
750 | static void kvm_mem_ioeventfd_add(MemoryRegionSection *section, |
751 | bool match_data, uint64_t data, int fd) | |
752 | { | |
753 | int r; | |
754 | ||
4b8f1c88 | 755 | assert(match_data && section->size <= 8); |
80a1ea37 | 756 | |
4b8f1c88 MT |
757 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
758 | data, true, section->size); | |
80a1ea37 AK |
759 | if (r < 0) { |
760 | abort(); | |
761 | } | |
762 | } | |
763 | ||
764 | static void kvm_mem_ioeventfd_del(MemoryRegionSection *section, | |
765 | bool match_data, uint64_t data, int fd) | |
766 | { | |
767 | int r; | |
768 | ||
4b8f1c88 MT |
769 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
770 | data, false, section->size); | |
80a1ea37 AK |
771 | if (r < 0) { |
772 | abort(); | |
773 | } | |
774 | } | |
775 | ||
776 | static void kvm_io_ioeventfd_add(MemoryRegionSection *section, | |
777 | bool match_data, uint64_t data, int fd) | |
778 | { | |
779 | int r; | |
780 | ||
781 | assert(match_data && section->size == 2); | |
782 | ||
783 | r = kvm_set_ioeventfd_pio_word(fd, section->offset_within_address_space, | |
784 | data, true); | |
785 | if (r < 0) { | |
786 | abort(); | |
787 | } | |
788 | } | |
789 | ||
790 | static void kvm_io_ioeventfd_del(MemoryRegionSection *section, | |
791 | bool match_data, uint64_t data, int fd) | |
792 | ||
793 | { | |
794 | int r; | |
795 | ||
796 | r = kvm_set_ioeventfd_pio_word(fd, section->offset_within_address_space, | |
797 | data, false); | |
798 | if (r < 0) { | |
799 | abort(); | |
800 | } | |
801 | } | |
802 | ||
803 | static void kvm_eventfd_add(MemoryListener *listener, | |
804 | MemoryRegionSection *section, | |
805 | bool match_data, uint64_t data, int fd) | |
806 | { | |
807 | if (section->address_space == get_system_memory()) { | |
808 | kvm_mem_ioeventfd_add(section, match_data, data, fd); | |
809 | } else { | |
810 | kvm_io_ioeventfd_add(section, match_data, data, fd); | |
811 | } | |
812 | } | |
813 | ||
814 | static void kvm_eventfd_del(MemoryListener *listener, | |
815 | MemoryRegionSection *section, | |
816 | bool match_data, uint64_t data, int fd) | |
817 | { | |
818 | if (section->address_space == get_system_memory()) { | |
819 | kvm_mem_ioeventfd_del(section, match_data, data, fd); | |
820 | } else { | |
821 | kvm_io_ioeventfd_del(section, match_data, data, fd); | |
822 | } | |
823 | } | |
824 | ||
a01672d3 | 825 | static MemoryListener kvm_memory_listener = { |
50c1e149 AK |
826 | .begin = kvm_begin, |
827 | .commit = kvm_commit, | |
a01672d3 AK |
828 | .region_add = kvm_region_add, |
829 | .region_del = kvm_region_del, | |
50c1e149 | 830 | .region_nop = kvm_region_nop, |
e5896b12 AP |
831 | .log_start = kvm_log_start, |
832 | .log_stop = kvm_log_stop, | |
a01672d3 AK |
833 | .log_sync = kvm_log_sync, |
834 | .log_global_start = kvm_log_global_start, | |
835 | .log_global_stop = kvm_log_global_stop, | |
80a1ea37 AK |
836 | .eventfd_add = kvm_eventfd_add, |
837 | .eventfd_del = kvm_eventfd_del, | |
72e22d2f | 838 | .priority = 10, |
7b8f3b78 MT |
839 | }; |
840 | ||
9349b4f9 | 841 | static void kvm_handle_interrupt(CPUArchState *env, int mask) |
aa7f74d1 JK |
842 | { |
843 | env->interrupt_request |= mask; | |
844 | ||
845 | if (!qemu_cpu_is_self(env)) { | |
846 | qemu_cpu_kick(env); | |
847 | } | |
848 | } | |
849 | ||
84b058d7 JK |
850 | int kvm_irqchip_set_irq(KVMState *s, int irq, int level) |
851 | { | |
852 | struct kvm_irq_level event; | |
853 | int ret; | |
854 | ||
3d4b2649 | 855 | assert(kvm_irqchip_in_kernel()); |
84b058d7 JK |
856 | |
857 | event.level = level; | |
858 | event.irq = irq; | |
859 | ret = kvm_vm_ioctl(s, s->irqchip_inject_ioctl, &event); | |
860 | if (ret < 0) { | |
861 | perror("kvm_set_irqchip_line"); | |
862 | abort(); | |
863 | } | |
864 | ||
865 | return (s->irqchip_inject_ioctl == KVM_IRQ_LINE) ? 1 : event.status; | |
866 | } | |
867 | ||
868 | #ifdef KVM_CAP_IRQ_ROUTING | |
869 | static void set_gsi(KVMState *s, unsigned int gsi) | |
870 | { | |
84b058d7 JK |
871 | s->used_gsi_bitmap[gsi / 32] |= 1U << (gsi % 32); |
872 | } | |
873 | ||
04fa27f5 JK |
874 | static void clear_gsi(KVMState *s, unsigned int gsi) |
875 | { | |
876 | s->used_gsi_bitmap[gsi / 32] &= ~(1U << (gsi % 32)); | |
877 | } | |
878 | ||
84b058d7 JK |
879 | static void kvm_init_irq_routing(KVMState *s) |
880 | { | |
04fa27f5 | 881 | int gsi_count, i; |
84b058d7 JK |
882 | |
883 | gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING); | |
884 | if (gsi_count > 0) { | |
885 | unsigned int gsi_bits, i; | |
886 | ||
887 | /* Round up so we can search ints using ffs */ | |
bc8c6788 | 888 | gsi_bits = ALIGN(gsi_count, 32); |
84b058d7 | 889 | s->used_gsi_bitmap = g_malloc0(gsi_bits / 8); |
4e2e4e63 | 890 | s->gsi_count = gsi_count; |
84b058d7 JK |
891 | |
892 | /* Mark any over-allocated bits as already in use */ | |
893 | for (i = gsi_count; i < gsi_bits; i++) { | |
894 | set_gsi(s, i); | |
895 | } | |
896 | } | |
897 | ||
898 | s->irq_routes = g_malloc0(sizeof(*s->irq_routes)); | |
899 | s->nr_allocated_irq_routes = 0; | |
900 | ||
04fa27f5 JK |
901 | for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) { |
902 | QTAILQ_INIT(&s->msi_hashtab[i]); | |
903 | } | |
904 | ||
84b058d7 JK |
905 | kvm_arch_init_irq_routing(s); |
906 | } | |
907 | ||
908 | static void kvm_add_routing_entry(KVMState *s, | |
909 | struct kvm_irq_routing_entry *entry) | |
910 | { | |
911 | struct kvm_irq_routing_entry *new; | |
912 | int n, size; | |
913 | ||
914 | if (s->irq_routes->nr == s->nr_allocated_irq_routes) { | |
915 | n = s->nr_allocated_irq_routes * 2; | |
916 | if (n < 64) { | |
917 | n = 64; | |
918 | } | |
919 | size = sizeof(struct kvm_irq_routing); | |
920 | size += n * sizeof(*new); | |
921 | s->irq_routes = g_realloc(s->irq_routes, size); | |
922 | s->nr_allocated_irq_routes = n; | |
923 | } | |
924 | n = s->irq_routes->nr++; | |
925 | new = &s->irq_routes->entries[n]; | |
926 | memset(new, 0, sizeof(*new)); | |
927 | new->gsi = entry->gsi; | |
928 | new->type = entry->type; | |
929 | new->flags = entry->flags; | |
930 | new->u = entry->u; | |
931 | ||
932 | set_gsi(s, entry->gsi); | |
933 | } | |
934 | ||
935 | void kvm_irqchip_add_route(KVMState *s, int irq, int irqchip, int pin) | |
936 | { | |
937 | struct kvm_irq_routing_entry e; | |
938 | ||
4e2e4e63 JK |
939 | assert(pin < s->gsi_count); |
940 | ||
84b058d7 JK |
941 | e.gsi = irq; |
942 | e.type = KVM_IRQ_ROUTING_IRQCHIP; | |
943 | e.flags = 0; | |
944 | e.u.irqchip.irqchip = irqchip; | |
945 | e.u.irqchip.pin = pin; | |
946 | kvm_add_routing_entry(s, &e); | |
947 | } | |
948 | ||
949 | int kvm_irqchip_commit_routes(KVMState *s) | |
950 | { | |
951 | s->irq_routes->flags = 0; | |
952 | return kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); | |
953 | } | |
954 | ||
04fa27f5 JK |
955 | static void kvm_irqchip_release_virq(KVMState *s, int virq) |
956 | { | |
957 | struct kvm_irq_routing_entry *e; | |
958 | int i; | |
959 | ||
960 | for (i = 0; i < s->irq_routes->nr; i++) { | |
961 | e = &s->irq_routes->entries[i]; | |
962 | if (e->gsi == virq) { | |
963 | s->irq_routes->nr--; | |
964 | *e = s->irq_routes->entries[s->irq_routes->nr]; | |
965 | } | |
966 | } | |
967 | clear_gsi(s, virq); | |
968 | } | |
969 | ||
970 | static unsigned int kvm_hash_msi(uint32_t data) | |
971 | { | |
972 | /* This is optimized for IA32 MSI layout. However, no other arch shall | |
973 | * repeat the mistake of not providing a direct MSI injection API. */ | |
974 | return data & 0xff; | |
975 | } | |
976 | ||
977 | static void kvm_flush_dynamic_msi_routes(KVMState *s) | |
978 | { | |
979 | KVMMSIRoute *route, *next; | |
980 | unsigned int hash; | |
981 | ||
982 | for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) { | |
983 | QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) { | |
984 | kvm_irqchip_release_virq(s, route->kroute.gsi); | |
985 | QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry); | |
986 | g_free(route); | |
987 | } | |
988 | } | |
989 | } | |
990 | ||
991 | static int kvm_irqchip_get_virq(KVMState *s) | |
992 | { | |
993 | uint32_t *word = s->used_gsi_bitmap; | |
994 | int max_words = ALIGN(s->gsi_count, 32) / 32; | |
995 | int i, bit; | |
996 | bool retry = true; | |
997 | ||
998 | again: | |
999 | /* Return the lowest unused GSI in the bitmap */ | |
1000 | for (i = 0; i < max_words; i++) { | |
1001 | bit = ffs(~word[i]); | |
1002 | if (!bit) { | |
1003 | continue; | |
1004 | } | |
1005 | ||
1006 | return bit - 1 + i * 32; | |
1007 | } | |
1008 | if (retry) { | |
1009 | retry = false; | |
1010 | kvm_flush_dynamic_msi_routes(s); | |
1011 | goto again; | |
1012 | } | |
1013 | return -ENOSPC; | |
1014 | ||
1015 | } | |
1016 | ||
1017 | static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg) | |
1018 | { | |
1019 | unsigned int hash = kvm_hash_msi(msg.data); | |
1020 | KVMMSIRoute *route; | |
1021 | ||
1022 | QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) { | |
1023 | if (route->kroute.u.msi.address_lo == (uint32_t)msg.address && | |
1024 | route->kroute.u.msi.address_hi == (msg.address >> 32) && | |
1025 | route->kroute.u.msi.data == msg.data) { | |
1026 | return route; | |
1027 | } | |
1028 | } | |
1029 | return NULL; | |
1030 | } | |
1031 | ||
1032 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1033 | { | |
1034 | KVMMSIRoute *route; | |
1035 | ||
1036 | route = kvm_lookup_msi_route(s, msg); | |
1037 | if (!route) { | |
1038 | int virq, ret; | |
1039 | ||
1040 | virq = kvm_irqchip_get_virq(s); | |
1041 | if (virq < 0) { | |
1042 | return virq; | |
1043 | } | |
1044 | ||
1045 | route = g_malloc(sizeof(KVMMSIRoute)); | |
1046 | route->kroute.gsi = virq; | |
1047 | route->kroute.type = KVM_IRQ_ROUTING_MSI; | |
1048 | route->kroute.flags = 0; | |
1049 | route->kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1050 | route->kroute.u.msi.address_hi = msg.address >> 32; | |
1051 | route->kroute.u.msi.data = msg.data; | |
1052 | ||
1053 | kvm_add_routing_entry(s, &route->kroute); | |
1054 | ||
1055 | QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route, | |
1056 | entry); | |
1057 | ||
1058 | ret = kvm_irqchip_commit_routes(s); | |
1059 | if (ret < 0) { | |
1060 | return ret; | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | assert(route->kroute.type == KVM_IRQ_ROUTING_MSI); | |
1065 | ||
1066 | return kvm_irqchip_set_irq(s, route->kroute.gsi, 1); | |
1067 | } | |
1068 | ||
84b058d7 JK |
1069 | #else /* !KVM_CAP_IRQ_ROUTING */ |
1070 | ||
1071 | static void kvm_init_irq_routing(KVMState *s) | |
1072 | { | |
1073 | } | |
04fa27f5 JK |
1074 | |
1075 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1076 | { | |
1077 | abort(); | |
1078 | } | |
84b058d7 JK |
1079 | #endif /* !KVM_CAP_IRQ_ROUTING */ |
1080 | ||
1081 | static int kvm_irqchip_create(KVMState *s) | |
1082 | { | |
1083 | QemuOptsList *list = qemu_find_opts("machine"); | |
1084 | int ret; | |
1085 | ||
1086 | if (QTAILQ_EMPTY(&list->head) || | |
1087 | !qemu_opt_get_bool(QTAILQ_FIRST(&list->head), | |
1088 | "kernel_irqchip", false) || | |
1089 | !kvm_check_extension(s, KVM_CAP_IRQCHIP)) { | |
1090 | return 0; | |
1091 | } | |
1092 | ||
1093 | ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); | |
1094 | if (ret < 0) { | |
1095 | fprintf(stderr, "Create kernel irqchip failed\n"); | |
1096 | return ret; | |
1097 | } | |
1098 | ||
1099 | s->irqchip_inject_ioctl = KVM_IRQ_LINE; | |
1100 | if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) { | |
1101 | s->irqchip_inject_ioctl = KVM_IRQ_LINE_STATUS; | |
1102 | } | |
3d4b2649 | 1103 | kvm_kernel_irqchip = true; |
84b058d7 JK |
1104 | |
1105 | kvm_init_irq_routing(s); | |
1106 | ||
1107 | return 0; | |
1108 | } | |
1109 | ||
cad1e282 | 1110 | int kvm_init(void) |
05330448 | 1111 | { |
168ccc11 JK |
1112 | static const char upgrade_note[] = |
1113 | "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" | |
1114 | "(see http://sourceforge.net/projects/kvm).\n"; | |
05330448 | 1115 | KVMState *s; |
94a8d39a | 1116 | const KVMCapabilityInfo *missing_cap; |
05330448 AL |
1117 | int ret; |
1118 | int i; | |
1119 | ||
7267c094 | 1120 | s = g_malloc0(sizeof(KVMState)); |
05330448 | 1121 | |
3145fcb6 DG |
1122 | /* |
1123 | * On systems where the kernel can support different base page | |
1124 | * sizes, host page size may be different from TARGET_PAGE_SIZE, | |
1125 | * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum | |
1126 | * page size for the system though. | |
1127 | */ | |
1128 | assert(TARGET_PAGE_SIZE <= getpagesize()); | |
1129 | ||
e22a25c9 | 1130 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
72cf2d4f | 1131 | QTAILQ_INIT(&s->kvm_sw_breakpoints); |
e22a25c9 | 1132 | #endif |
a426e122 | 1133 | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
05330448 | 1134 | s->slots[i].slot = i; |
a426e122 | 1135 | } |
05330448 | 1136 | s->vmfd = -1; |
40ff6d7e | 1137 | s->fd = qemu_open("/dev/kvm", O_RDWR); |
05330448 AL |
1138 | if (s->fd == -1) { |
1139 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); | |
1140 | ret = -errno; | |
1141 | goto err; | |
1142 | } | |
1143 | ||
1144 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); | |
1145 | if (ret < KVM_API_VERSION) { | |
a426e122 | 1146 | if (ret > 0) { |
05330448 | 1147 | ret = -EINVAL; |
a426e122 | 1148 | } |
05330448 AL |
1149 | fprintf(stderr, "kvm version too old\n"); |
1150 | goto err; | |
1151 | } | |
1152 | ||
1153 | if (ret > KVM_API_VERSION) { | |
1154 | ret = -EINVAL; | |
1155 | fprintf(stderr, "kvm version not supported\n"); | |
1156 | goto err; | |
1157 | } | |
1158 | ||
1159 | s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0); | |
0104dcac AG |
1160 | if (s->vmfd < 0) { |
1161 | #ifdef TARGET_S390X | |
1162 | fprintf(stderr, "Please add the 'switch_amode' kernel parameter to " | |
1163 | "your host kernel command line\n"); | |
1164 | #endif | |
db9eae1c | 1165 | ret = s->vmfd; |
05330448 | 1166 | goto err; |
0104dcac | 1167 | } |
05330448 | 1168 | |
94a8d39a JK |
1169 | missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); |
1170 | if (!missing_cap) { | |
1171 | missing_cap = | |
1172 | kvm_check_extension_list(s, kvm_arch_required_capabilities); | |
05330448 | 1173 | } |
94a8d39a | 1174 | if (missing_cap) { |
ad7b8b33 | 1175 | ret = -EINVAL; |
94a8d39a JK |
1176 | fprintf(stderr, "kvm does not support %s\n%s", |
1177 | missing_cap->name, upgrade_note); | |
d85dc283 AL |
1178 | goto err; |
1179 | } | |
1180 | ||
ad7b8b33 | 1181 | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
f65ed4c1 | 1182 | |
e69917e2 | 1183 | s->broken_set_mem_region = 1; |
14a09518 | 1184 | ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS); |
e69917e2 JK |
1185 | if (ret > 0) { |
1186 | s->broken_set_mem_region = 0; | |
1187 | } | |
e69917e2 | 1188 | |
a0fb002c JK |
1189 | #ifdef KVM_CAP_VCPU_EVENTS |
1190 | s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); | |
1191 | #endif | |
1192 | ||
b0b1d690 JK |
1193 | s->robust_singlestep = |
1194 | kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); | |
b0b1d690 | 1195 | |
ff44f1a3 JK |
1196 | #ifdef KVM_CAP_DEBUGREGS |
1197 | s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); | |
1198 | #endif | |
1199 | ||
f1665b21 SY |
1200 | #ifdef KVM_CAP_XSAVE |
1201 | s->xsave = kvm_check_extension(s, KVM_CAP_XSAVE); | |
1202 | #endif | |
1203 | ||
f1665b21 SY |
1204 | #ifdef KVM_CAP_XCRS |
1205 | s->xcrs = kvm_check_extension(s, KVM_CAP_XCRS); | |
1206 | #endif | |
1207 | ||
8a7c7393 JK |
1208 | #ifdef KVM_CAP_PIT_STATE2 |
1209 | s->pit_state2 = kvm_check_extension(s, KVM_CAP_PIT_STATE2); | |
1210 | #endif | |
1211 | ||
cad1e282 | 1212 | ret = kvm_arch_init(s); |
a426e122 | 1213 | if (ret < 0) { |
05330448 | 1214 | goto err; |
a426e122 | 1215 | } |
05330448 | 1216 | |
84b058d7 JK |
1217 | ret = kvm_irqchip_create(s); |
1218 | if (ret < 0) { | |
1219 | goto err; | |
1220 | } | |
1221 | ||
05330448 | 1222 | kvm_state = s; |
7376e582 | 1223 | memory_listener_register(&kvm_memory_listener, NULL); |
05330448 | 1224 | |
d2f2b8a7 SH |
1225 | s->many_ioeventfds = kvm_check_many_ioeventfds(); |
1226 | ||
aa7f74d1 JK |
1227 | cpu_interrupt_handler = kvm_handle_interrupt; |
1228 | ||
05330448 AL |
1229 | return 0; |
1230 | ||
1231 | err: | |
1232 | if (s) { | |
db9eae1c | 1233 | if (s->vmfd >= 0) { |
05330448 | 1234 | close(s->vmfd); |
a426e122 JK |
1235 | } |
1236 | if (s->fd != -1) { | |
05330448 | 1237 | close(s->fd); |
a426e122 | 1238 | } |
05330448 | 1239 | } |
7267c094 | 1240 | g_free(s); |
05330448 AL |
1241 | |
1242 | return ret; | |
1243 | } | |
1244 | ||
b30e93e9 JK |
1245 | static void kvm_handle_io(uint16_t port, void *data, int direction, int size, |
1246 | uint32_t count) | |
05330448 AL |
1247 | { |
1248 | int i; | |
1249 | uint8_t *ptr = data; | |
1250 | ||
1251 | for (i = 0; i < count; i++) { | |
1252 | if (direction == KVM_EXIT_IO_IN) { | |
1253 | switch (size) { | |
1254 | case 1: | |
afcea8cb | 1255 | stb_p(ptr, cpu_inb(port)); |
05330448 AL |
1256 | break; |
1257 | case 2: | |
afcea8cb | 1258 | stw_p(ptr, cpu_inw(port)); |
05330448 AL |
1259 | break; |
1260 | case 4: | |
afcea8cb | 1261 | stl_p(ptr, cpu_inl(port)); |
05330448 AL |
1262 | break; |
1263 | } | |
1264 | } else { | |
1265 | switch (size) { | |
1266 | case 1: | |
afcea8cb | 1267 | cpu_outb(port, ldub_p(ptr)); |
05330448 AL |
1268 | break; |
1269 | case 2: | |
afcea8cb | 1270 | cpu_outw(port, lduw_p(ptr)); |
05330448 AL |
1271 | break; |
1272 | case 4: | |
afcea8cb | 1273 | cpu_outl(port, ldl_p(ptr)); |
05330448 AL |
1274 | break; |
1275 | } | |
1276 | } | |
1277 | ||
1278 | ptr += size; | |
1279 | } | |
05330448 AL |
1280 | } |
1281 | ||
9349b4f9 | 1282 | static int kvm_handle_internal_error(CPUArchState *env, struct kvm_run *run) |
7c80eef8 | 1283 | { |
bb44e0d1 | 1284 | fprintf(stderr, "KVM internal error."); |
7c80eef8 MT |
1285 | if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) { |
1286 | int i; | |
1287 | ||
bb44e0d1 | 1288 | fprintf(stderr, " Suberror: %d\n", run->internal.suberror); |
7c80eef8 MT |
1289 | for (i = 0; i < run->internal.ndata; ++i) { |
1290 | fprintf(stderr, "extra data[%d]: %"PRIx64"\n", | |
1291 | i, (uint64_t)run->internal.data[i]); | |
1292 | } | |
bb44e0d1 JK |
1293 | } else { |
1294 | fprintf(stderr, "\n"); | |
7c80eef8 | 1295 | } |
7c80eef8 MT |
1296 | if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) { |
1297 | fprintf(stderr, "emulation failure\n"); | |
a426e122 | 1298 | if (!kvm_arch_stop_on_emulation_error(env)) { |
f5c848ee | 1299 | cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE); |
d73cd8f4 | 1300 | return EXCP_INTERRUPT; |
a426e122 | 1301 | } |
7c80eef8 MT |
1302 | } |
1303 | /* FIXME: Should trigger a qmp message to let management know | |
1304 | * something went wrong. | |
1305 | */ | |
73aaec4a | 1306 | return -1; |
7c80eef8 | 1307 | } |
7c80eef8 | 1308 | |
62a2744c | 1309 | void kvm_flush_coalesced_mmio_buffer(void) |
f65ed4c1 | 1310 | { |
f65ed4c1 | 1311 | KVMState *s = kvm_state; |
1cae88b9 AK |
1312 | |
1313 | if (s->coalesced_flush_in_progress) { | |
1314 | return; | |
1315 | } | |
1316 | ||
1317 | s->coalesced_flush_in_progress = true; | |
1318 | ||
62a2744c SY |
1319 | if (s->coalesced_mmio_ring) { |
1320 | struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring; | |
f65ed4c1 AL |
1321 | while (ring->first != ring->last) { |
1322 | struct kvm_coalesced_mmio *ent; | |
1323 | ||
1324 | ent = &ring->coalesced_mmio[ring->first]; | |
1325 | ||
1326 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); | |
85199474 | 1327 | smp_wmb(); |
f65ed4c1 AL |
1328 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; |
1329 | } | |
1330 | } | |
1cae88b9 AK |
1331 | |
1332 | s->coalesced_flush_in_progress = false; | |
f65ed4c1 AL |
1333 | } |
1334 | ||
2705d56a | 1335 | static void do_kvm_cpu_synchronize_state(void *_env) |
4c0960c0 | 1336 | { |
9349b4f9 | 1337 | CPUArchState *env = _env; |
2705d56a | 1338 | |
9ded2744 | 1339 | if (!env->kvm_vcpu_dirty) { |
4c0960c0 | 1340 | kvm_arch_get_registers(env); |
9ded2744 | 1341 | env->kvm_vcpu_dirty = 1; |
4c0960c0 AK |
1342 | } |
1343 | } | |
1344 | ||
9349b4f9 | 1345 | void kvm_cpu_synchronize_state(CPUArchState *env) |
2705d56a | 1346 | { |
a426e122 | 1347 | if (!env->kvm_vcpu_dirty) { |
2705d56a | 1348 | run_on_cpu(env, do_kvm_cpu_synchronize_state, env); |
a426e122 | 1349 | } |
2705d56a JK |
1350 | } |
1351 | ||
9349b4f9 | 1352 | void kvm_cpu_synchronize_post_reset(CPUArchState *env) |
ea375f9a JK |
1353 | { |
1354 | kvm_arch_put_registers(env, KVM_PUT_RESET_STATE); | |
1355 | env->kvm_vcpu_dirty = 0; | |
1356 | } | |
1357 | ||
9349b4f9 | 1358 | void kvm_cpu_synchronize_post_init(CPUArchState *env) |
ea375f9a JK |
1359 | { |
1360 | kvm_arch_put_registers(env, KVM_PUT_FULL_STATE); | |
1361 | env->kvm_vcpu_dirty = 0; | |
1362 | } | |
1363 | ||
9349b4f9 | 1364 | int kvm_cpu_exec(CPUArchState *env) |
05330448 AL |
1365 | { |
1366 | struct kvm_run *run = env->kvm_run; | |
7cbb533f | 1367 | int ret, run_ret; |
05330448 | 1368 | |
8c0d577e | 1369 | DPRINTF("kvm_cpu_exec()\n"); |
05330448 | 1370 | |
99036865 | 1371 | if (kvm_arch_process_async_events(env)) { |
9ccfac9e | 1372 | env->exit_request = 0; |
6792a57b | 1373 | return EXCP_HLT; |
9ccfac9e | 1374 | } |
0af691d7 | 1375 | |
9ccfac9e | 1376 | do { |
9ded2744 | 1377 | if (env->kvm_vcpu_dirty) { |
ea375f9a | 1378 | kvm_arch_put_registers(env, KVM_PUT_RUNTIME_STATE); |
9ded2744 | 1379 | env->kvm_vcpu_dirty = 0; |
4c0960c0 AK |
1380 | } |
1381 | ||
8c14c173 | 1382 | kvm_arch_pre_run(env, run); |
9ccfac9e JK |
1383 | if (env->exit_request) { |
1384 | DPRINTF("interrupt exit requested\n"); | |
1385 | /* | |
1386 | * KVM requires us to reenter the kernel after IO exits to complete | |
1387 | * instruction emulation. This self-signal will ensure that we | |
1388 | * leave ASAP again. | |
1389 | */ | |
1390 | qemu_cpu_kick_self(); | |
1391 | } | |
d549db5a | 1392 | qemu_mutex_unlock_iothread(); |
9ccfac9e | 1393 | |
7cbb533f | 1394 | run_ret = kvm_vcpu_ioctl(env, KVM_RUN, 0); |
9ccfac9e | 1395 | |
d549db5a | 1396 | qemu_mutex_lock_iothread(); |
05330448 AL |
1397 | kvm_arch_post_run(env, run); |
1398 | ||
b0c883b5 JK |
1399 | kvm_flush_coalesced_mmio_buffer(); |
1400 | ||
7cbb533f | 1401 | if (run_ret < 0) { |
dc77d341 JK |
1402 | if (run_ret == -EINTR || run_ret == -EAGAIN) { |
1403 | DPRINTF("io window exit\n"); | |
d73cd8f4 | 1404 | ret = EXCP_INTERRUPT; |
dc77d341 JK |
1405 | break; |
1406 | } | |
7b011fbc ME |
1407 | fprintf(stderr, "error: kvm run failed %s\n", |
1408 | strerror(-run_ret)); | |
05330448 AL |
1409 | abort(); |
1410 | } | |
1411 | ||
05330448 AL |
1412 | switch (run->exit_reason) { |
1413 | case KVM_EXIT_IO: | |
8c0d577e | 1414 | DPRINTF("handle_io\n"); |
b30e93e9 JK |
1415 | kvm_handle_io(run->io.port, |
1416 | (uint8_t *)run + run->io.data_offset, | |
1417 | run->io.direction, | |
1418 | run->io.size, | |
1419 | run->io.count); | |
d73cd8f4 | 1420 | ret = 0; |
05330448 AL |
1421 | break; |
1422 | case KVM_EXIT_MMIO: | |
8c0d577e | 1423 | DPRINTF("handle_mmio\n"); |
05330448 AL |
1424 | cpu_physical_memory_rw(run->mmio.phys_addr, |
1425 | run->mmio.data, | |
1426 | run->mmio.len, | |
1427 | run->mmio.is_write); | |
d73cd8f4 | 1428 | ret = 0; |
05330448 AL |
1429 | break; |
1430 | case KVM_EXIT_IRQ_WINDOW_OPEN: | |
8c0d577e | 1431 | DPRINTF("irq_window_open\n"); |
d73cd8f4 | 1432 | ret = EXCP_INTERRUPT; |
05330448 AL |
1433 | break; |
1434 | case KVM_EXIT_SHUTDOWN: | |
8c0d577e | 1435 | DPRINTF("shutdown\n"); |
05330448 | 1436 | qemu_system_reset_request(); |
d73cd8f4 | 1437 | ret = EXCP_INTERRUPT; |
05330448 AL |
1438 | break; |
1439 | case KVM_EXIT_UNKNOWN: | |
bb44e0d1 JK |
1440 | fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", |
1441 | (uint64_t)run->hw.hardware_exit_reason); | |
73aaec4a | 1442 | ret = -1; |
05330448 | 1443 | break; |
7c80eef8 | 1444 | case KVM_EXIT_INTERNAL_ERROR: |
73aaec4a | 1445 | ret = kvm_handle_internal_error(env, run); |
7c80eef8 | 1446 | break; |
05330448 | 1447 | default: |
8c0d577e | 1448 | DPRINTF("kvm_arch_handle_exit\n"); |
05330448 AL |
1449 | ret = kvm_arch_handle_exit(env, run); |
1450 | break; | |
1451 | } | |
d73cd8f4 | 1452 | } while (ret == 0); |
05330448 | 1453 | |
73aaec4a | 1454 | if (ret < 0) { |
f5c848ee | 1455 | cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE); |
0461d5a6 | 1456 | vm_stop(RUN_STATE_INTERNAL_ERROR); |
becfc390 AL |
1457 | } |
1458 | ||
6792a57b | 1459 | env->exit_request = 0; |
05330448 AL |
1460 | return ret; |
1461 | } | |
1462 | ||
984b5181 | 1463 | int kvm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
1464 | { |
1465 | int ret; | |
984b5181 AL |
1466 | void *arg; |
1467 | va_list ap; | |
05330448 | 1468 | |
984b5181 AL |
1469 | va_start(ap, type); |
1470 | arg = va_arg(ap, void *); | |
1471 | va_end(ap); | |
1472 | ||
1473 | ret = ioctl(s->fd, type, arg); | |
a426e122 | 1474 | if (ret == -1) { |
05330448 | 1475 | ret = -errno; |
a426e122 | 1476 | } |
05330448 AL |
1477 | return ret; |
1478 | } | |
1479 | ||
984b5181 | 1480 | int kvm_vm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
1481 | { |
1482 | int ret; | |
984b5181 AL |
1483 | void *arg; |
1484 | va_list ap; | |
1485 | ||
1486 | va_start(ap, type); | |
1487 | arg = va_arg(ap, void *); | |
1488 | va_end(ap); | |
05330448 | 1489 | |
984b5181 | 1490 | ret = ioctl(s->vmfd, type, arg); |
a426e122 | 1491 | if (ret == -1) { |
05330448 | 1492 | ret = -errno; |
a426e122 | 1493 | } |
05330448 AL |
1494 | return ret; |
1495 | } | |
1496 | ||
9349b4f9 | 1497 | int kvm_vcpu_ioctl(CPUArchState *env, int type, ...) |
05330448 AL |
1498 | { |
1499 | int ret; | |
984b5181 AL |
1500 | void *arg; |
1501 | va_list ap; | |
1502 | ||
1503 | va_start(ap, type); | |
1504 | arg = va_arg(ap, void *); | |
1505 | va_end(ap); | |
05330448 | 1506 | |
984b5181 | 1507 | ret = ioctl(env->kvm_fd, type, arg); |
a426e122 | 1508 | if (ret == -1) { |
05330448 | 1509 | ret = -errno; |
a426e122 | 1510 | } |
05330448 AL |
1511 | return ret; |
1512 | } | |
bd322087 AL |
1513 | |
1514 | int kvm_has_sync_mmu(void) | |
1515 | { | |
94a8d39a | 1516 | return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); |
bd322087 | 1517 | } |
e22a25c9 | 1518 | |
a0fb002c JK |
1519 | int kvm_has_vcpu_events(void) |
1520 | { | |
1521 | return kvm_state->vcpu_events; | |
1522 | } | |
1523 | ||
b0b1d690 JK |
1524 | int kvm_has_robust_singlestep(void) |
1525 | { | |
1526 | return kvm_state->robust_singlestep; | |
1527 | } | |
1528 | ||
ff44f1a3 JK |
1529 | int kvm_has_debugregs(void) |
1530 | { | |
1531 | return kvm_state->debugregs; | |
1532 | } | |
1533 | ||
f1665b21 SY |
1534 | int kvm_has_xsave(void) |
1535 | { | |
1536 | return kvm_state->xsave; | |
1537 | } | |
1538 | ||
1539 | int kvm_has_xcrs(void) | |
1540 | { | |
1541 | return kvm_state->xcrs; | |
1542 | } | |
1543 | ||
8a7c7393 JK |
1544 | int kvm_has_pit_state2(void) |
1545 | { | |
1546 | return kvm_state->pit_state2; | |
1547 | } | |
1548 | ||
d2f2b8a7 SH |
1549 | int kvm_has_many_ioeventfds(void) |
1550 | { | |
1551 | if (!kvm_enabled()) { | |
1552 | return 0; | |
1553 | } | |
1554 | return kvm_state->many_ioeventfds; | |
1555 | } | |
1556 | ||
84b058d7 JK |
1557 | int kvm_has_gsi_routing(void) |
1558 | { | |
a9c5eb0d | 1559 | #ifdef KVM_CAP_IRQ_ROUTING |
84b058d7 | 1560 | return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING); |
a9c5eb0d AG |
1561 | #else |
1562 | return false; | |
1563 | #endif | |
84b058d7 JK |
1564 | } |
1565 | ||
9b5b76d4 JK |
1566 | int kvm_allows_irq0_override(void) |
1567 | { | |
3d4b2649 | 1568 | return !kvm_irqchip_in_kernel() || kvm_has_gsi_routing(); |
9b5b76d4 JK |
1569 | } |
1570 | ||
6f0437e8 JK |
1571 | void kvm_setup_guest_memory(void *start, size_t size) |
1572 | { | |
1573 | if (!kvm_has_sync_mmu()) { | |
e78815a5 | 1574 | int ret = qemu_madvise(start, size, QEMU_MADV_DONTFORK); |
6f0437e8 JK |
1575 | |
1576 | if (ret) { | |
e78815a5 AF |
1577 | perror("qemu_madvise"); |
1578 | fprintf(stderr, | |
1579 | "Need MADV_DONTFORK in absence of synchronous KVM MMU\n"); | |
6f0437e8 JK |
1580 | exit(1); |
1581 | } | |
6f0437e8 JK |
1582 | } |
1583 | } | |
1584 | ||
e22a25c9 | 1585 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
9349b4f9 | 1586 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUArchState *env, |
e22a25c9 AL |
1587 | target_ulong pc) |
1588 | { | |
1589 | struct kvm_sw_breakpoint *bp; | |
1590 | ||
72cf2d4f | 1591 | QTAILQ_FOREACH(bp, &env->kvm_state->kvm_sw_breakpoints, entry) { |
a426e122 | 1592 | if (bp->pc == pc) { |
e22a25c9 | 1593 | return bp; |
a426e122 | 1594 | } |
e22a25c9 AL |
1595 | } |
1596 | return NULL; | |
1597 | } | |
1598 | ||
9349b4f9 | 1599 | int kvm_sw_breakpoints_active(CPUArchState *env) |
e22a25c9 | 1600 | { |
72cf2d4f | 1601 | return !QTAILQ_EMPTY(&env->kvm_state->kvm_sw_breakpoints); |
e22a25c9 AL |
1602 | } |
1603 | ||
452e4751 GC |
1604 | struct kvm_set_guest_debug_data { |
1605 | struct kvm_guest_debug dbg; | |
9349b4f9 | 1606 | CPUArchState *env; |
452e4751 GC |
1607 | int err; |
1608 | }; | |
1609 | ||
1610 | static void kvm_invoke_set_guest_debug(void *data) | |
1611 | { | |
1612 | struct kvm_set_guest_debug_data *dbg_data = data; | |
9349b4f9 | 1613 | CPUArchState *env = dbg_data->env; |
b3807725 | 1614 | |
b3807725 | 1615 | dbg_data->err = kvm_vcpu_ioctl(env, KVM_SET_GUEST_DEBUG, &dbg_data->dbg); |
452e4751 GC |
1616 | } |
1617 | ||
9349b4f9 | 1618 | int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap) |
e22a25c9 | 1619 | { |
452e4751 | 1620 | struct kvm_set_guest_debug_data data; |
e22a25c9 | 1621 | |
b0b1d690 | 1622 | data.dbg.control = reinject_trap; |
e22a25c9 | 1623 | |
b0b1d690 JK |
1624 | if (env->singlestep_enabled) { |
1625 | data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; | |
1626 | } | |
452e4751 | 1627 | kvm_arch_update_guest_debug(env, &data.dbg); |
452e4751 | 1628 | data.env = env; |
e22a25c9 | 1629 | |
be41cbe0 | 1630 | run_on_cpu(env, kvm_invoke_set_guest_debug, &data); |
452e4751 | 1631 | return data.err; |
e22a25c9 AL |
1632 | } |
1633 | ||
9349b4f9 | 1634 | int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr, |
e22a25c9 AL |
1635 | target_ulong len, int type) |
1636 | { | |
1637 | struct kvm_sw_breakpoint *bp; | |
9349b4f9 | 1638 | CPUArchState *env; |
e22a25c9 AL |
1639 | int err; |
1640 | ||
1641 | if (type == GDB_BREAKPOINT_SW) { | |
1642 | bp = kvm_find_sw_breakpoint(current_env, addr); | |
1643 | if (bp) { | |
1644 | bp->use_count++; | |
1645 | return 0; | |
1646 | } | |
1647 | ||
7267c094 | 1648 | bp = g_malloc(sizeof(struct kvm_sw_breakpoint)); |
a426e122 | 1649 | if (!bp) { |
e22a25c9 | 1650 | return -ENOMEM; |
a426e122 | 1651 | } |
e22a25c9 AL |
1652 | |
1653 | bp->pc = addr; | |
1654 | bp->use_count = 1; | |
1655 | err = kvm_arch_insert_sw_breakpoint(current_env, bp); | |
1656 | if (err) { | |
7267c094 | 1657 | g_free(bp); |
e22a25c9 AL |
1658 | return err; |
1659 | } | |
1660 | ||
72cf2d4f | 1661 | QTAILQ_INSERT_HEAD(¤t_env->kvm_state->kvm_sw_breakpoints, |
e22a25c9 AL |
1662 | bp, entry); |
1663 | } else { | |
1664 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); | |
a426e122 | 1665 | if (err) { |
e22a25c9 | 1666 | return err; |
a426e122 | 1667 | } |
e22a25c9 AL |
1668 | } |
1669 | ||
1670 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
1671 | err = kvm_update_guest_debug(env, 0); | |
a426e122 | 1672 | if (err) { |
e22a25c9 | 1673 | return err; |
a426e122 | 1674 | } |
e22a25c9 AL |
1675 | } |
1676 | return 0; | |
1677 | } | |
1678 | ||
9349b4f9 | 1679 | int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr, |
e22a25c9 AL |
1680 | target_ulong len, int type) |
1681 | { | |
1682 | struct kvm_sw_breakpoint *bp; | |
9349b4f9 | 1683 | CPUArchState *env; |
e22a25c9 AL |
1684 | int err; |
1685 | ||
1686 | if (type == GDB_BREAKPOINT_SW) { | |
1687 | bp = kvm_find_sw_breakpoint(current_env, addr); | |
a426e122 | 1688 | if (!bp) { |
e22a25c9 | 1689 | return -ENOENT; |
a426e122 | 1690 | } |
e22a25c9 AL |
1691 | |
1692 | if (bp->use_count > 1) { | |
1693 | bp->use_count--; | |
1694 | return 0; | |
1695 | } | |
1696 | ||
1697 | err = kvm_arch_remove_sw_breakpoint(current_env, bp); | |
a426e122 | 1698 | if (err) { |
e22a25c9 | 1699 | return err; |
a426e122 | 1700 | } |
e22a25c9 | 1701 | |
72cf2d4f | 1702 | QTAILQ_REMOVE(¤t_env->kvm_state->kvm_sw_breakpoints, bp, entry); |
7267c094 | 1703 | g_free(bp); |
e22a25c9 AL |
1704 | } else { |
1705 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); | |
a426e122 | 1706 | if (err) { |
e22a25c9 | 1707 | return err; |
a426e122 | 1708 | } |
e22a25c9 AL |
1709 | } |
1710 | ||
1711 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
1712 | err = kvm_update_guest_debug(env, 0); | |
a426e122 | 1713 | if (err) { |
e22a25c9 | 1714 | return err; |
a426e122 | 1715 | } |
e22a25c9 AL |
1716 | } |
1717 | return 0; | |
1718 | } | |
1719 | ||
9349b4f9 | 1720 | void kvm_remove_all_breakpoints(CPUArchState *current_env) |
e22a25c9 AL |
1721 | { |
1722 | struct kvm_sw_breakpoint *bp, *next; | |
1723 | KVMState *s = current_env->kvm_state; | |
9349b4f9 | 1724 | CPUArchState *env; |
e22a25c9 | 1725 | |
72cf2d4f | 1726 | QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
e22a25c9 AL |
1727 | if (kvm_arch_remove_sw_breakpoint(current_env, bp) != 0) { |
1728 | /* Try harder to find a CPU that currently sees the breakpoint. */ | |
1729 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
a426e122 | 1730 | if (kvm_arch_remove_sw_breakpoint(env, bp) == 0) { |
e22a25c9 | 1731 | break; |
a426e122 | 1732 | } |
e22a25c9 AL |
1733 | } |
1734 | } | |
1735 | } | |
1736 | kvm_arch_remove_all_hw_breakpoints(); | |
1737 | ||
a426e122 | 1738 | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
e22a25c9 | 1739 | kvm_update_guest_debug(env, 0); |
a426e122 | 1740 | } |
e22a25c9 AL |
1741 | } |
1742 | ||
1743 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ | |
1744 | ||
9349b4f9 | 1745 | int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap) |
e22a25c9 AL |
1746 | { |
1747 | return -EINVAL; | |
1748 | } | |
1749 | ||
9349b4f9 | 1750 | int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr, |
e22a25c9 AL |
1751 | target_ulong len, int type) |
1752 | { | |
1753 | return -EINVAL; | |
1754 | } | |
1755 | ||
9349b4f9 | 1756 | int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr, |
e22a25c9 AL |
1757 | target_ulong len, int type) |
1758 | { | |
1759 | return -EINVAL; | |
1760 | } | |
1761 | ||
9349b4f9 | 1762 | void kvm_remove_all_breakpoints(CPUArchState *current_env) |
e22a25c9 AL |
1763 | { |
1764 | } | |
1765 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ | |
cc84de95 | 1766 | |
9349b4f9 | 1767 | int kvm_set_signal_mask(CPUArchState *env, const sigset_t *sigset) |
cc84de95 MT |
1768 | { |
1769 | struct kvm_signal_mask *sigmask; | |
1770 | int r; | |
1771 | ||
a426e122 | 1772 | if (!sigset) { |
cc84de95 | 1773 | return kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, NULL); |
a426e122 | 1774 | } |
cc84de95 | 1775 | |
7267c094 | 1776 | sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset)); |
cc84de95 MT |
1777 | |
1778 | sigmask->len = 8; | |
1779 | memcpy(sigmask->sigset, sigset, sizeof(*sigset)); | |
1780 | r = kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, sigmask); | |
7267c094 | 1781 | g_free(sigmask); |
cc84de95 MT |
1782 | |
1783 | return r; | |
1784 | } | |
ca821806 | 1785 | |
4b8f1c88 MT |
1786 | int kvm_set_ioeventfd_mmio(int fd, uint32_t addr, uint32_t val, bool assign, |
1787 | uint32_t size) | |
44f1a3d8 | 1788 | { |
44f1a3d8 CM |
1789 | int ret; |
1790 | struct kvm_ioeventfd iofd; | |
1791 | ||
1792 | iofd.datamatch = val; | |
1793 | iofd.addr = addr; | |
4b8f1c88 | 1794 | iofd.len = size; |
44f1a3d8 CM |
1795 | iofd.flags = KVM_IOEVENTFD_FLAG_DATAMATCH; |
1796 | iofd.fd = fd; | |
1797 | ||
1798 | if (!kvm_enabled()) { | |
1799 | return -ENOSYS; | |
1800 | } | |
1801 | ||
1802 | if (!assign) { | |
1803 | iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
1804 | } | |
1805 | ||
1806 | ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); | |
1807 | ||
1808 | if (ret < 0) { | |
1809 | return -errno; | |
1810 | } | |
1811 | ||
1812 | return 0; | |
44f1a3d8 CM |
1813 | } |
1814 | ||
ca821806 MT |
1815 | int kvm_set_ioeventfd_pio_word(int fd, uint16_t addr, uint16_t val, bool assign) |
1816 | { | |
1817 | struct kvm_ioeventfd kick = { | |
1818 | .datamatch = val, | |
1819 | .addr = addr, | |
1820 | .len = 2, | |
1821 | .flags = KVM_IOEVENTFD_FLAG_DATAMATCH | KVM_IOEVENTFD_FLAG_PIO, | |
1822 | .fd = fd, | |
1823 | }; | |
1824 | int r; | |
a426e122 | 1825 | if (!kvm_enabled()) { |
ca821806 | 1826 | return -ENOSYS; |
a426e122 JK |
1827 | } |
1828 | if (!assign) { | |
ca821806 | 1829 | kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; |
a426e122 | 1830 | } |
ca821806 | 1831 | r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); |
a426e122 | 1832 | if (r < 0) { |
ca821806 | 1833 | return r; |
a426e122 | 1834 | } |
ca821806 | 1835 | return 0; |
98c8573e | 1836 | } |
a1b87fe0 | 1837 | |
9349b4f9 | 1838 | int kvm_on_sigbus_vcpu(CPUArchState *env, int code, void *addr) |
a1b87fe0 JK |
1839 | { |
1840 | return kvm_arch_on_sigbus_vcpu(env, code, addr); | |
1841 | } | |
1842 | ||
1843 | int kvm_on_sigbus(int code, void *addr) | |
1844 | { | |
1845 | return kvm_arch_on_sigbus(code, addr); | |
1846 | } |