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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 | ||
d38ea87a | 16 | #include "qemu/osdep.h" |
05330448 | 17 | #include <sys/ioctl.h> |
05330448 AL |
18 | |
19 | #include <linux/kvm.h> | |
20 | ||
1de7afc9 PB |
21 | #include "qemu/atomic.h" |
22 | #include "qemu/option.h" | |
23 | #include "qemu/config-file.h" | |
4b3cfe72 | 24 | #include "qemu/error-report.h" |
556969e9 | 25 | #include "qapi/error.h" |
d33a1810 | 26 | #include "hw/hw.h" |
a2cb15b0 | 27 | #include "hw/pci/msi.h" |
d1f6af6a | 28 | #include "hw/pci/msix.h" |
d426d9fb | 29 | #include "hw/s390x/adapter.h" |
022c62cb | 30 | #include "exec/gdbstub.h" |
8571ed35 | 31 | #include "sysemu/kvm_int.h" |
d2528bdc | 32 | #include "sysemu/cpus.h" |
1de7afc9 | 33 | #include "qemu/bswap.h" |
022c62cb | 34 | #include "exec/memory.h" |
747afd5b | 35 | #include "exec/ram_addr.h" |
022c62cb | 36 | #include "exec/address-spaces.h" |
1de7afc9 | 37 | #include "qemu/event_notifier.h" |
92229a57 | 38 | #include "trace.h" |
197e3524 | 39 | #include "hw/irq.h" |
b20e3780 | 40 | #include "sysemu/sev.h" |
f5948942 | 41 | #include "sysemu/balloon.h" |
05330448 | 42 | |
135a129a AK |
43 | #include "hw/boards.h" |
44 | ||
d2f2b8a7 SH |
45 | /* This check must be after config-host.h is included */ |
46 | #ifdef CONFIG_EVENTFD | |
47 | #include <sys/eventfd.h> | |
48 | #endif | |
49 | ||
bc92e4e9 AJ |
50 | /* KVM uses PAGE_SIZE in its definition of KVM_COALESCED_MMIO_MAX. We |
51 | * need to use the real host PAGE_SIZE, as that's what KVM will use. | |
52 | */ | |
53 | #define PAGE_SIZE getpagesize() | |
f65ed4c1 | 54 | |
05330448 AL |
55 | //#define DEBUG_KVM |
56 | ||
57 | #ifdef DEBUG_KVM | |
8c0d577e | 58 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
59 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
60 | #else | |
8c0d577e | 61 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
62 | do { } while (0) |
63 | #endif | |
64 | ||
04fa27f5 JK |
65 | #define KVM_MSI_HASHTAB_SIZE 256 |
66 | ||
4c055ab5 GZ |
67 | struct KVMParkedVcpu { |
68 | unsigned long vcpu_id; | |
69 | int kvm_fd; | |
70 | QLIST_ENTRY(KVMParkedVcpu) node; | |
71 | }; | |
72 | ||
9d1c35df | 73 | struct KVMState |
05330448 | 74 | { |
fc02086b EH |
75 | AccelState parent_obj; |
76 | ||
fb541ca5 | 77 | int nr_slots; |
05330448 AL |
78 | int fd; |
79 | int vmfd; | |
f65ed4c1 | 80 | int coalesced_mmio; |
e6d34aee | 81 | int coalesced_pio; |
62a2744c | 82 | struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; |
1cae88b9 | 83 | bool coalesced_flush_in_progress; |
a0fb002c | 84 | int vcpu_events; |
b0b1d690 | 85 | int robust_singlestep; |
ff44f1a3 | 86 | int debugregs; |
e22a25c9 | 87 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
b58deb34 | 88 | QTAILQ_HEAD(, kvm_sw_breakpoint) kvm_sw_breakpoints; |
e22a25c9 | 89 | #endif |
ebbfef2f | 90 | int max_nested_state_len; |
d2f2b8a7 | 91 | int many_ioeventfds; |
3ab73842 | 92 | int intx_set_mask; |
62dd4eda | 93 | bool sync_mmu; |
92e4b519 DG |
94 | /* The man page (and posix) say ioctl numbers are signed int, but |
95 | * they're not. Linux, glibc and *BSD all treat ioctl numbers as | |
96 | * unsigned, and treating them as signed here can break things */ | |
e333cd69 | 97 | unsigned irq_set_ioctl; |
aed6efb9 | 98 | unsigned int sigmask_len; |
197e3524 | 99 | GHashTable *gsimap; |
84b058d7 JK |
100 | #ifdef KVM_CAP_IRQ_ROUTING |
101 | struct kvm_irq_routing *irq_routes; | |
102 | int nr_allocated_irq_routes; | |
8269fb70 | 103 | unsigned long *used_gsi_bitmap; |
4e2e4e63 | 104 | unsigned int gsi_count; |
b58deb34 | 105 | QTAILQ_HEAD(, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE]; |
84b058d7 | 106 | #endif |
7bbda04c | 107 | KVMMemoryListener memory_listener; |
4c055ab5 | 108 | QLIST_HEAD(, KVMParkedVcpu) kvm_parked_vcpus; |
b20e3780 BS |
109 | |
110 | /* memory encryption */ | |
111 | void *memcrypt_handle; | |
54e89539 | 112 | int (*memcrypt_encrypt_data)(void *handle, uint8_t *ptr, uint64_t len); |
9d1c35df | 113 | }; |
05330448 | 114 | |
6a7af8cb | 115 | KVMState *kvm_state; |
3d4b2649 | 116 | bool kvm_kernel_irqchip; |
15eafc2e | 117 | bool kvm_split_irqchip; |
7ae26bd4 | 118 | bool kvm_async_interrupts_allowed; |
215e79c0 | 119 | bool kvm_halt_in_kernel_allowed; |
69e03ae6 | 120 | bool kvm_eventfds_allowed; |
cc7e0ddf | 121 | bool kvm_irqfds_allowed; |
f41389ae | 122 | bool kvm_resamplefds_allowed; |
614e41bc | 123 | bool kvm_msi_via_irqfd_allowed; |
f3e1bed8 | 124 | bool kvm_gsi_routing_allowed; |
76fe21de | 125 | bool kvm_gsi_direct_mapping; |
13eed94e | 126 | bool kvm_allowed; |
df9c8b75 | 127 | bool kvm_readonly_mem_allowed; |
d0a073a1 | 128 | bool kvm_vm_attributes_allowed; |
50bf31b9 | 129 | bool kvm_direct_msi_allowed; |
35108223 | 130 | bool kvm_ioeventfd_any_length_allowed; |
767a554a | 131 | bool kvm_msi_use_devid; |
cf0f7cf9 | 132 | static bool kvm_immediate_exit; |
05330448 | 133 | |
94a8d39a JK |
134 | static const KVMCapabilityInfo kvm_required_capabilites[] = { |
135 | KVM_CAP_INFO(USER_MEMORY), | |
136 | KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS), | |
89de4b91 | 137 | KVM_CAP_INFO(JOIN_MEMORY_REGIONS_WORKS), |
94a8d39a JK |
138 | KVM_CAP_LAST_INFO |
139 | }; | |
140 | ||
44f2e6c1 BR |
141 | int kvm_get_max_memslots(void) |
142 | { | |
143 | KVMState *s = KVM_STATE(current_machine->accelerator); | |
144 | ||
145 | return s->nr_slots; | |
146 | } | |
147 | ||
b20e3780 BS |
148 | bool kvm_memcrypt_enabled(void) |
149 | { | |
150 | if (kvm_state && kvm_state->memcrypt_handle) { | |
151 | return true; | |
152 | } | |
153 | ||
154 | return false; | |
155 | } | |
156 | ||
54e89539 BS |
157 | int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len) |
158 | { | |
159 | if (kvm_state->memcrypt_handle && | |
160 | kvm_state->memcrypt_encrypt_data) { | |
161 | return kvm_state->memcrypt_encrypt_data(kvm_state->memcrypt_handle, | |
162 | ptr, len); | |
163 | } | |
164 | ||
165 | return 1; | |
166 | } | |
167 | ||
7bbda04c | 168 | static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml) |
05330448 | 169 | { |
7bbda04c | 170 | KVMState *s = kvm_state; |
05330448 AL |
171 | int i; |
172 | ||
fb541ca5 | 173 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c PB |
174 | if (kml->slots[i].memory_size == 0) { |
175 | return &kml->slots[i]; | |
a426e122 | 176 | } |
05330448 AL |
177 | } |
178 | ||
b8865591 IM |
179 | return NULL; |
180 | } | |
181 | ||
182 | bool kvm_has_free_slot(MachineState *ms) | |
183 | { | |
7bbda04c PB |
184 | KVMState *s = KVM_STATE(ms->accelerator); |
185 | ||
186 | return kvm_get_free_slot(&s->memory_listener); | |
b8865591 IM |
187 | } |
188 | ||
7bbda04c | 189 | static KVMSlot *kvm_alloc_slot(KVMMemoryListener *kml) |
b8865591 | 190 | { |
7bbda04c | 191 | KVMSlot *slot = kvm_get_free_slot(kml); |
b8865591 IM |
192 | |
193 | if (slot) { | |
194 | return slot; | |
195 | } | |
196 | ||
d3f8d37f AL |
197 | fprintf(stderr, "%s: no free slot available\n", __func__); |
198 | abort(); | |
199 | } | |
200 | ||
7bbda04c | 201 | static KVMSlot *kvm_lookup_matching_slot(KVMMemoryListener *kml, |
a8170e5e | 202 | hwaddr start_addr, |
2747e716 | 203 | hwaddr size) |
d3f8d37f | 204 | { |
7bbda04c | 205 | KVMState *s = kvm_state; |
d3f8d37f AL |
206 | int i; |
207 | ||
fb541ca5 | 208 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c | 209 | KVMSlot *mem = &kml->slots[i]; |
d3f8d37f | 210 | |
2747e716 | 211 | if (start_addr == mem->start_addr && size == mem->memory_size) { |
d3f8d37f AL |
212 | return mem; |
213 | } | |
214 | } | |
215 | ||
05330448 AL |
216 | return NULL; |
217 | } | |
218 | ||
5ea69c2e DH |
219 | /* |
220 | * Calculate and align the start address and the size of the section. | |
221 | * Return the size. If the size is 0, the aligned section is empty. | |
222 | */ | |
223 | static hwaddr kvm_align_section(MemoryRegionSection *section, | |
224 | hwaddr *start) | |
225 | { | |
226 | hwaddr size = int128_get64(section->size); | |
a6ffc423 | 227 | hwaddr delta, aligned; |
5ea69c2e DH |
228 | |
229 | /* kvm works in page size chunks, but the function may be called | |
230 | with sub-page size and unaligned start address. Pad the start | |
231 | address to next and truncate size to previous page boundary. */ | |
a6ffc423 DH |
232 | aligned = ROUND_UP(section->offset_within_address_space, |
233 | qemu_real_host_page_size); | |
234 | delta = aligned - section->offset_within_address_space; | |
235 | *start = aligned; | |
5ea69c2e DH |
236 | if (delta > size) { |
237 | return 0; | |
238 | } | |
5ea69c2e | 239 | |
a6ffc423 | 240 | return (size - delta) & qemu_real_host_page_mask; |
5ea69c2e DH |
241 | } |
242 | ||
9f213ed9 | 243 | int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, |
a8170e5e | 244 | hwaddr *phys_addr) |
983dfc3b | 245 | { |
7bbda04c | 246 | KVMMemoryListener *kml = &s->memory_listener; |
983dfc3b HY |
247 | int i; |
248 | ||
fb541ca5 | 249 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c | 250 | KVMSlot *mem = &kml->slots[i]; |
983dfc3b | 251 | |
9f213ed9 AK |
252 | if (ram >= mem->ram && ram < mem->ram + mem->memory_size) { |
253 | *phys_addr = mem->start_addr + (ram - mem->ram); | |
983dfc3b HY |
254 | return 1; |
255 | } | |
256 | } | |
257 | ||
258 | return 0; | |
259 | } | |
260 | ||
6c090d4a | 261 | static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot, bool new) |
5832d1f2 | 262 | { |
7bbda04c | 263 | KVMState *s = kvm_state; |
5832d1f2 | 264 | struct kvm_userspace_memory_region mem; |
fe29141b | 265 | int ret; |
5832d1f2 | 266 | |
38bfe691 | 267 | mem.slot = slot->slot | (kml->as_id << 16); |
5832d1f2 | 268 | mem.guest_phys_addr = slot->start_addr; |
9f213ed9 | 269 | mem.userspace_addr = (unsigned long)slot->ram; |
5832d1f2 | 270 | mem.flags = slot->flags; |
651eb0f4 | 271 | |
6c090d4a | 272 | if (slot->memory_size && !new && (mem.flags ^ slot->old_flags) & KVM_MEM_READONLY) { |
235e8982 JJ |
273 | /* Set the slot size to 0 before setting the slot to the desired |
274 | * value. This is needed based on KVM commit 75d61fbc. */ | |
275 | mem.memory_size = 0; | |
276 | kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); | |
277 | } | |
278 | mem.memory_size = slot->memory_size; | |
fe29141b | 279 | ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); |
6c090d4a | 280 | slot->old_flags = mem.flags; |
fe29141b AK |
281 | trace_kvm_set_user_memory(mem.slot, mem.flags, mem.guest_phys_addr, |
282 | mem.memory_size, mem.userspace_addr, ret); | |
283 | return ret; | |
5832d1f2 AL |
284 | } |
285 | ||
4c055ab5 GZ |
286 | int kvm_destroy_vcpu(CPUState *cpu) |
287 | { | |
288 | KVMState *s = kvm_state; | |
289 | long mmap_size; | |
290 | struct KVMParkedVcpu *vcpu = NULL; | |
291 | int ret = 0; | |
292 | ||
293 | DPRINTF("kvm_destroy_vcpu\n"); | |
294 | ||
b1115c99 LA |
295 | ret = kvm_arch_destroy_vcpu(cpu); |
296 | if (ret < 0) { | |
297 | goto err; | |
298 | } | |
299 | ||
4c055ab5 GZ |
300 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); |
301 | if (mmap_size < 0) { | |
302 | ret = mmap_size; | |
303 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); | |
304 | goto err; | |
305 | } | |
306 | ||
307 | ret = munmap(cpu->kvm_run, mmap_size); | |
308 | if (ret < 0) { | |
309 | goto err; | |
310 | } | |
311 | ||
312 | vcpu = g_malloc0(sizeof(*vcpu)); | |
313 | vcpu->vcpu_id = kvm_arch_vcpu_id(cpu); | |
314 | vcpu->kvm_fd = cpu->kvm_fd; | |
315 | QLIST_INSERT_HEAD(&kvm_state->kvm_parked_vcpus, vcpu, node); | |
316 | err: | |
317 | return ret; | |
318 | } | |
319 | ||
320 | static int kvm_get_vcpu(KVMState *s, unsigned long vcpu_id) | |
321 | { | |
322 | struct KVMParkedVcpu *cpu; | |
323 | ||
324 | QLIST_FOREACH(cpu, &s->kvm_parked_vcpus, node) { | |
325 | if (cpu->vcpu_id == vcpu_id) { | |
326 | int kvm_fd; | |
327 | ||
328 | QLIST_REMOVE(cpu, node); | |
329 | kvm_fd = cpu->kvm_fd; | |
330 | g_free(cpu); | |
331 | return kvm_fd; | |
332 | } | |
333 | } | |
334 | ||
335 | return kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)vcpu_id); | |
336 | } | |
337 | ||
504134d2 | 338 | int kvm_init_vcpu(CPUState *cpu) |
05330448 AL |
339 | { |
340 | KVMState *s = kvm_state; | |
341 | long mmap_size; | |
342 | int ret; | |
343 | ||
8c0d577e | 344 | DPRINTF("kvm_init_vcpu\n"); |
05330448 | 345 | |
4c055ab5 | 346 | ret = kvm_get_vcpu(s, kvm_arch_vcpu_id(cpu)); |
05330448 | 347 | if (ret < 0) { |
8c0d577e | 348 | DPRINTF("kvm_create_vcpu failed\n"); |
05330448 AL |
349 | goto err; |
350 | } | |
351 | ||
8737c51c | 352 | cpu->kvm_fd = ret; |
a60f24b5 | 353 | cpu->kvm_state = s; |
99f31832 | 354 | cpu->vcpu_dirty = true; |
05330448 AL |
355 | |
356 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
357 | if (mmap_size < 0) { | |
748a680b | 358 | ret = mmap_size; |
8c0d577e | 359 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); |
05330448 AL |
360 | goto err; |
361 | } | |
362 | ||
f7575c96 | 363 | cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, |
8737c51c | 364 | cpu->kvm_fd, 0); |
f7575c96 | 365 | if (cpu->kvm_run == MAP_FAILED) { |
05330448 | 366 | ret = -errno; |
8c0d577e | 367 | DPRINTF("mmap'ing vcpu state failed\n"); |
05330448 AL |
368 | goto err; |
369 | } | |
370 | ||
a426e122 JK |
371 | if (s->coalesced_mmio && !s->coalesced_mmio_ring) { |
372 | s->coalesced_mmio_ring = | |
f7575c96 | 373 | (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE; |
a426e122 | 374 | } |
62a2744c | 375 | |
20d695a9 | 376 | ret = kvm_arch_init_vcpu(cpu); |
05330448 AL |
377 | err: |
378 | return ret; | |
379 | } | |
380 | ||
5832d1f2 AL |
381 | /* |
382 | * dirty pages logging control | |
383 | */ | |
25254bbc | 384 | |
d6ff5cbc | 385 | static int kvm_mem_flags(MemoryRegion *mr) |
25254bbc | 386 | { |
d6ff5cbc | 387 | bool readonly = mr->readonly || memory_region_is_romd(mr); |
235e8982 | 388 | int flags = 0; |
d6ff5cbc AJ |
389 | |
390 | if (memory_region_get_dirty_log_mask(mr) != 0) { | |
391 | flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
392 | } | |
235e8982 JJ |
393 | if (readonly && kvm_readonly_mem_allowed) { |
394 | flags |= KVM_MEM_READONLY; | |
395 | } | |
396 | return flags; | |
25254bbc MT |
397 | } |
398 | ||
7bbda04c PB |
399 | static int kvm_slot_update_flags(KVMMemoryListener *kml, KVMSlot *mem, |
400 | MemoryRegion *mr) | |
5832d1f2 | 401 | { |
d6ff5cbc | 402 | mem->flags = kvm_mem_flags(mr); |
5832d1f2 | 403 | |
4495d6a7 | 404 | /* If nothing changed effectively, no need to issue ioctl */ |
6c090d4a | 405 | if (mem->flags == mem->old_flags) { |
25254bbc | 406 | return 0; |
4495d6a7 JK |
407 | } |
408 | ||
6c090d4a | 409 | return kvm_set_user_memory_region(kml, mem, false); |
5832d1f2 AL |
410 | } |
411 | ||
7bbda04c PB |
412 | static int kvm_section_update_flags(KVMMemoryListener *kml, |
413 | MemoryRegionSection *section) | |
25254bbc | 414 | { |
343562e8 DH |
415 | hwaddr start_addr, size; |
416 | KVMSlot *mem; | |
25254bbc | 417 | |
343562e8 DH |
418 | size = kvm_align_section(section, &start_addr); |
419 | if (!size) { | |
ea8cb1a8 | 420 | return 0; |
25254bbc | 421 | } |
343562e8 DH |
422 | |
423 | mem = kvm_lookup_matching_slot(kml, start_addr, size); | |
424 | if (!mem) { | |
e377e87c DH |
425 | /* We don't have a slot if we want to trap every access. */ |
426 | return 0; | |
343562e8 DH |
427 | } |
428 | ||
429 | return kvm_slot_update_flags(kml, mem, section->mr); | |
25254bbc MT |
430 | } |
431 | ||
a01672d3 | 432 | static void kvm_log_start(MemoryListener *listener, |
b2dfd71c PB |
433 | MemoryRegionSection *section, |
434 | int old, int new) | |
5832d1f2 | 435 | { |
7bbda04c | 436 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
437 | int r; |
438 | ||
b2dfd71c PB |
439 | if (old != 0) { |
440 | return; | |
441 | } | |
442 | ||
7bbda04c | 443 | r = kvm_section_update_flags(kml, section); |
a01672d3 AK |
444 | if (r < 0) { |
445 | abort(); | |
446 | } | |
5832d1f2 AL |
447 | } |
448 | ||
a01672d3 | 449 | static void kvm_log_stop(MemoryListener *listener, |
b2dfd71c PB |
450 | MemoryRegionSection *section, |
451 | int old, int new) | |
5832d1f2 | 452 | { |
7bbda04c | 453 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
454 | int r; |
455 | ||
b2dfd71c PB |
456 | if (new != 0) { |
457 | return; | |
458 | } | |
459 | ||
7bbda04c | 460 | r = kvm_section_update_flags(kml, section); |
a01672d3 AK |
461 | if (r < 0) { |
462 | abort(); | |
463 | } | |
5832d1f2 AL |
464 | } |
465 | ||
8369e01c | 466 | /* get kvm's dirty pages bitmap and update qemu's */ |
ffcde12f AK |
467 | static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section, |
468 | unsigned long *bitmap) | |
96c1606b | 469 | { |
8e41fb63 FZ |
470 | ram_addr_t start = section->offset_within_region + |
471 | memory_region_get_ram_addr(section->mr); | |
5ff7fb77 JQ |
472 | ram_addr_t pages = int128_get64(section->size) / getpagesize(); |
473 | ||
474 | cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages); | |
8369e01c | 475 | return 0; |
96c1606b AG |
476 | } |
477 | ||
8369e01c MT |
478 | #define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) |
479 | ||
5832d1f2 | 480 | /** |
4a12a11a | 481 | * kvm_physical_sync_dirty_bitmap - Sync dirty bitmap from kernel space |
5832d1f2 | 482 | * |
4a12a11a PX |
483 | * This function will first try to fetch dirty bitmap from the kernel, |
484 | * and then updates qemu's dirty bitmap. | |
485 | * | |
486 | * @kml: the KVM memory listener object | |
487 | * @section: the memory section to sync the dirty bitmap with | |
5832d1f2 | 488 | */ |
7bbda04c PB |
489 | static int kvm_physical_sync_dirty_bitmap(KVMMemoryListener *kml, |
490 | MemoryRegionSection *section) | |
5832d1f2 AL |
491 | { |
492 | KVMState *s = kvm_state; | |
714f78c5 | 493 | struct kvm_dirty_log d = {}; |
151f7749 | 494 | KVMSlot *mem; |
67548f09 DH |
495 | hwaddr start_addr, size; |
496 | ||
497 | size = kvm_align_section(section, &start_addr); | |
498 | if (size) { | |
499 | mem = kvm_lookup_matching_slot(kml, start_addr, size); | |
500 | if (!mem) { | |
e377e87c DH |
501 | /* We don't have a slot if we want to trap every access. */ |
502 | return 0; | |
151f7749 | 503 | } |
5832d1f2 | 504 | |
51b0c606 MT |
505 | /* XXX bad kernel interface alert |
506 | * For dirty bitmap, kernel allocates array of size aligned to | |
507 | * bits-per-long. But for case when the kernel is 64bits and | |
508 | * the userspace is 32bits, userspace can't align to the same | |
509 | * bits-per-long, since sizeof(long) is different between kernel | |
510 | * and user space. This way, userspace will provide buffer which | |
511 | * may be 4 bytes less than the kernel will use, resulting in | |
512 | * userspace memory corruption (which is not detectable by valgrind | |
513 | * too, in most cases). | |
514 | * So for now, let's align to 64 instead of HOST_LONG_BITS here, in | |
cb8d4c8f | 515 | * a hope that sizeof(long) won't become >8 any time soon. |
51b0c606 MT |
516 | */ |
517 | size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), | |
518 | /*HOST_LONG_BITS*/ 64) / 8; | |
9f4bf4ba PX |
519 | if (!mem->dirty_bmap) { |
520 | /* Allocate on the first log_sync, once and for all */ | |
521 | mem->dirty_bmap = g_malloc0(size); | |
522 | } | |
5832d1f2 | 523 | |
9f4bf4ba | 524 | d.dirty_bitmap = mem->dirty_bmap; |
38bfe691 | 525 | d.slot = mem->slot | (kml->as_id << 16); |
50212d63 | 526 | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { |
8c0d577e | 527 | DPRINTF("ioctl failed %d\n", errno); |
67548f09 | 528 | return -1; |
151f7749 | 529 | } |
5832d1f2 | 530 | |
ffcde12f | 531 | kvm_get_dirty_pages_log_range(section, d.dirty_bitmap); |
5832d1f2 | 532 | } |
151f7749 | 533 | |
67548f09 | 534 | return 0; |
5832d1f2 AL |
535 | } |
536 | ||
95d2994a AK |
537 | static void kvm_coalesce_mmio_region(MemoryListener *listener, |
538 | MemoryRegionSection *secion, | |
a8170e5e | 539 | hwaddr start, hwaddr size) |
f65ed4c1 | 540 | { |
f65ed4c1 AL |
541 | KVMState *s = kvm_state; |
542 | ||
543 | if (s->coalesced_mmio) { | |
544 | struct kvm_coalesced_mmio_zone zone; | |
545 | ||
546 | zone.addr = start; | |
547 | zone.size = size; | |
7e680753 | 548 | zone.pad = 0; |
f65ed4c1 | 549 | |
95d2994a | 550 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 551 | } |
f65ed4c1 AL |
552 | } |
553 | ||
95d2994a AK |
554 | static void kvm_uncoalesce_mmio_region(MemoryListener *listener, |
555 | MemoryRegionSection *secion, | |
a8170e5e | 556 | hwaddr start, hwaddr size) |
f65ed4c1 | 557 | { |
f65ed4c1 AL |
558 | KVMState *s = kvm_state; |
559 | ||
560 | if (s->coalesced_mmio) { | |
561 | struct kvm_coalesced_mmio_zone zone; | |
562 | ||
563 | zone.addr = start; | |
564 | zone.size = size; | |
7e680753 | 565 | zone.pad = 0; |
f65ed4c1 | 566 | |
95d2994a | 567 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 568 | } |
f65ed4c1 AL |
569 | } |
570 | ||
e6d34aee PH |
571 | static void kvm_coalesce_pio_add(MemoryListener *listener, |
572 | MemoryRegionSection *section, | |
573 | hwaddr start, hwaddr size) | |
574 | { | |
575 | KVMState *s = kvm_state; | |
576 | ||
577 | if (s->coalesced_pio) { | |
578 | struct kvm_coalesced_mmio_zone zone; | |
579 | ||
580 | zone.addr = start; | |
581 | zone.size = size; | |
582 | zone.pio = 1; | |
583 | ||
584 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); | |
585 | } | |
586 | } | |
587 | ||
588 | static void kvm_coalesce_pio_del(MemoryListener *listener, | |
589 | MemoryRegionSection *section, | |
590 | hwaddr start, hwaddr size) | |
591 | { | |
592 | KVMState *s = kvm_state; | |
593 | ||
594 | if (s->coalesced_pio) { | |
595 | struct kvm_coalesced_mmio_zone zone; | |
596 | ||
597 | zone.addr = start; | |
598 | zone.size = size; | |
599 | zone.pio = 1; | |
600 | ||
601 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); | |
602 | } | |
603 | } | |
604 | ||
605 | static MemoryListener kvm_coalesced_pio_listener = { | |
606 | .coalesced_io_add = kvm_coalesce_pio_add, | |
607 | .coalesced_io_del = kvm_coalesce_pio_del, | |
608 | }; | |
609 | ||
ad7b8b33 AL |
610 | int kvm_check_extension(KVMState *s, unsigned int extension) |
611 | { | |
612 | int ret; | |
613 | ||
614 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
615 | if (ret < 0) { | |
616 | ret = 0; | |
617 | } | |
618 | ||
619 | return ret; | |
620 | } | |
621 | ||
7d0a07fa AG |
622 | int kvm_vm_check_extension(KVMState *s, unsigned int extension) |
623 | { | |
624 | int ret; | |
625 | ||
626 | ret = kvm_vm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
627 | if (ret < 0) { | |
628 | /* VM wide version not implemented, use global one instead */ | |
629 | ret = kvm_check_extension(s, extension); | |
630 | } | |
631 | ||
632 | return ret; | |
633 | } | |
634 | ||
b680c5ba GK |
635 | static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size) |
636 | { | |
637 | #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN) | |
638 | /* The kernel expects ioeventfd values in HOST_WORDS_BIGENDIAN | |
639 | * endianness, but the memory core hands them in target endianness. | |
640 | * For example, PPC is always treated as big-endian even if running | |
641 | * on KVM and on PPC64LE. Correct here. | |
642 | */ | |
643 | switch (size) { | |
644 | case 2: | |
645 | val = bswap16(val); | |
646 | break; | |
647 | case 4: | |
648 | val = bswap32(val); | |
649 | break; | |
650 | } | |
651 | #endif | |
652 | return val; | |
653 | } | |
654 | ||
584f2be7 | 655 | static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val, |
41cb62c2 | 656 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
657 | { |
658 | int ret; | |
03a96b83 TH |
659 | struct kvm_ioeventfd iofd = { |
660 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, | |
661 | .addr = addr, | |
662 | .len = size, | |
663 | .flags = 0, | |
664 | .fd = fd, | |
665 | }; | |
500ffd4a | 666 | |
876d16cd DDAG |
667 | trace_kvm_set_ioeventfd_mmio(fd, (uint64_t)addr, val, assign, size, |
668 | datamatch); | |
500ffd4a MT |
669 | if (!kvm_enabled()) { |
670 | return -ENOSYS; | |
671 | } | |
672 | ||
41cb62c2 MT |
673 | if (datamatch) { |
674 | iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
675 | } | |
500ffd4a MT |
676 | if (!assign) { |
677 | iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
678 | } | |
679 | ||
680 | ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); | |
681 | ||
682 | if (ret < 0) { | |
683 | return -errno; | |
684 | } | |
685 | ||
686 | return 0; | |
687 | } | |
688 | ||
44c3f8f7 | 689 | static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val, |
41cb62c2 | 690 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
691 | { |
692 | struct kvm_ioeventfd kick = { | |
b680c5ba | 693 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, |
500ffd4a | 694 | .addr = addr, |
41cb62c2 | 695 | .flags = KVM_IOEVENTFD_FLAG_PIO, |
44c3f8f7 | 696 | .len = size, |
500ffd4a MT |
697 | .fd = fd, |
698 | }; | |
699 | int r; | |
876d16cd | 700 | trace_kvm_set_ioeventfd_pio(fd, addr, val, assign, size, datamatch); |
500ffd4a MT |
701 | if (!kvm_enabled()) { |
702 | return -ENOSYS; | |
703 | } | |
41cb62c2 MT |
704 | if (datamatch) { |
705 | kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
706 | } | |
500ffd4a MT |
707 | if (!assign) { |
708 | kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
709 | } | |
710 | r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); | |
711 | if (r < 0) { | |
712 | return r; | |
713 | } | |
714 | return 0; | |
715 | } | |
716 | ||
717 | ||
d2f2b8a7 SH |
718 | static int kvm_check_many_ioeventfds(void) |
719 | { | |
d0dcac83 SH |
720 | /* Userspace can use ioeventfd for io notification. This requires a host |
721 | * that supports eventfd(2) and an I/O thread; since eventfd does not | |
722 | * support SIGIO it cannot interrupt the vcpu. | |
723 | * | |
724 | * Older kernels have a 6 device limit on the KVM io bus. Find out so we | |
d2f2b8a7 SH |
725 | * can avoid creating too many ioeventfds. |
726 | */ | |
12d4536f | 727 | #if defined(CONFIG_EVENTFD) |
d2f2b8a7 SH |
728 | int ioeventfds[7]; |
729 | int i, ret = 0; | |
730 | for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { | |
731 | ioeventfds[i] = eventfd(0, EFD_CLOEXEC); | |
732 | if (ioeventfds[i] < 0) { | |
733 | break; | |
734 | } | |
41cb62c2 | 735 | ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true); |
d2f2b8a7 SH |
736 | if (ret < 0) { |
737 | close(ioeventfds[i]); | |
738 | break; | |
739 | } | |
740 | } | |
741 | ||
742 | /* Decide whether many devices are supported or not */ | |
743 | ret = i == ARRAY_SIZE(ioeventfds); | |
744 | ||
745 | while (i-- > 0) { | |
41cb62c2 | 746 | kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true); |
d2f2b8a7 SH |
747 | close(ioeventfds[i]); |
748 | } | |
749 | return ret; | |
750 | #else | |
751 | return 0; | |
752 | #endif | |
753 | } | |
754 | ||
94a8d39a JK |
755 | static const KVMCapabilityInfo * |
756 | kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list) | |
757 | { | |
758 | while (list->name) { | |
759 | if (!kvm_check_extension(s, list->value)) { | |
760 | return list; | |
761 | } | |
762 | list++; | |
763 | } | |
764 | return NULL; | |
765 | } | |
766 | ||
7bbda04c PB |
767 | static void kvm_set_phys_mem(KVMMemoryListener *kml, |
768 | MemoryRegionSection *section, bool add) | |
46dbef6a | 769 | { |
f357f564 | 770 | KVMSlot *mem; |
46dbef6a | 771 | int err; |
a01672d3 | 772 | MemoryRegion *mr = section->mr; |
235e8982 | 773 | bool writeable = !mr->readonly && !mr->rom_device; |
5ea69c2e DH |
774 | hwaddr start_addr, size; |
775 | void *ram; | |
46dbef6a | 776 | |
a01672d3 | 777 | if (!memory_region_is_ram(mr)) { |
235e8982 JJ |
778 | if (writeable || !kvm_readonly_mem_allowed) { |
779 | return; | |
780 | } else if (!mr->romd_mode) { | |
781 | /* If the memory device is not in romd_mode, then we actually want | |
782 | * to remove the kvm memory slot so all accesses will trap. */ | |
783 | add = false; | |
784 | } | |
9f213ed9 AK |
785 | } |
786 | ||
5ea69c2e DH |
787 | size = kvm_align_section(section, &start_addr); |
788 | if (!size) { | |
789 | return; | |
790 | } | |
791 | ||
bbfd3017 | 792 | /* use aligned delta to align the ram address */ |
5ea69c2e | 793 | ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + |
bbfd3017 | 794 | (start_addr - section->offset_within_address_space); |
a01672d3 | 795 | |
f357f564 | 796 | if (!add) { |
90ed4bcc | 797 | mem = kvm_lookup_matching_slot(kml, start_addr, size); |
46dbef6a | 798 | if (!mem) { |
46dbef6a MT |
799 | return; |
800 | } | |
1bfbac4e | 801 | if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { |
7bbda04c | 802 | kvm_physical_sync_dirty_bitmap(kml, section); |
3fbffb62 AK |
803 | } |
804 | ||
f357f564 | 805 | /* unregister the slot */ |
9f4bf4ba PX |
806 | g_free(mem->dirty_bmap); |
807 | mem->dirty_bmap = NULL; | |
46dbef6a | 808 | mem->memory_size = 0; |
6c090d4a SZ |
809 | mem->flags = 0; |
810 | err = kvm_set_user_memory_region(kml, mem, false); | |
46dbef6a | 811 | if (err) { |
1c4fdaba | 812 | fprintf(stderr, "%s: error unregistering slot: %s\n", |
46dbef6a MT |
813 | __func__, strerror(-err)); |
814 | abort(); | |
815 | } | |
f357f564 | 816 | return; |
46dbef6a MT |
817 | } |
818 | ||
f357f564 | 819 | /* register the new slot */ |
7bbda04c | 820 | mem = kvm_alloc_slot(kml); |
46dbef6a MT |
821 | mem->memory_size = size; |
822 | mem->start_addr = start_addr; | |
9f213ed9 | 823 | mem->ram = ram; |
d6ff5cbc | 824 | mem->flags = kvm_mem_flags(mr); |
46dbef6a | 825 | |
6c090d4a | 826 | err = kvm_set_user_memory_region(kml, mem, true); |
46dbef6a MT |
827 | if (err) { |
828 | fprintf(stderr, "%s: error registering slot: %s\n", __func__, | |
829 | strerror(-err)); | |
830 | abort(); | |
831 | } | |
832 | } | |
833 | ||
a01672d3 AK |
834 | static void kvm_region_add(MemoryListener *listener, |
835 | MemoryRegionSection *section) | |
836 | { | |
7bbda04c PB |
837 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
838 | ||
dfde4e6e | 839 | memory_region_ref(section->mr); |
7bbda04c | 840 | kvm_set_phys_mem(kml, section, true); |
a01672d3 AK |
841 | } |
842 | ||
843 | static void kvm_region_del(MemoryListener *listener, | |
844 | MemoryRegionSection *section) | |
845 | { | |
7bbda04c PB |
846 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
847 | ||
848 | kvm_set_phys_mem(kml, section, false); | |
dfde4e6e | 849 | memory_region_unref(section->mr); |
a01672d3 AK |
850 | } |
851 | ||
852 | static void kvm_log_sync(MemoryListener *listener, | |
853 | MemoryRegionSection *section) | |
7b8f3b78 | 854 | { |
7bbda04c | 855 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
856 | int r; |
857 | ||
7bbda04c | 858 | r = kvm_physical_sync_dirty_bitmap(kml, section); |
a01672d3 AK |
859 | if (r < 0) { |
860 | abort(); | |
861 | } | |
7b8f3b78 MT |
862 | } |
863 | ||
d22b096e AK |
864 | static void kvm_mem_ioeventfd_add(MemoryListener *listener, |
865 | MemoryRegionSection *section, | |
866 | bool match_data, uint64_t data, | |
867 | EventNotifier *e) | |
868 | { | |
869 | int fd = event_notifier_get_fd(e); | |
80a1ea37 AK |
870 | int r; |
871 | ||
4b8f1c88 | 872 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
873 | data, true, int128_get64(section->size), |
874 | match_data); | |
80a1ea37 | 875 | if (r < 0) { |
e346bcbf YK |
876 | fprintf(stderr, "%s: error adding ioeventfd: %s (%d)\n", |
877 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
878 | abort(); |
879 | } | |
880 | } | |
881 | ||
d22b096e AK |
882 | static void kvm_mem_ioeventfd_del(MemoryListener *listener, |
883 | MemoryRegionSection *section, | |
884 | bool match_data, uint64_t data, | |
885 | EventNotifier *e) | |
80a1ea37 | 886 | { |
d22b096e | 887 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
888 | int r; |
889 | ||
4b8f1c88 | 890 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
891 | data, false, int128_get64(section->size), |
892 | match_data); | |
80a1ea37 | 893 | if (r < 0) { |
e346bcbf YK |
894 | fprintf(stderr, "%s: error deleting ioeventfd: %s (%d)\n", |
895 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
896 | abort(); |
897 | } | |
898 | } | |
899 | ||
d22b096e AK |
900 | static void kvm_io_ioeventfd_add(MemoryListener *listener, |
901 | MemoryRegionSection *section, | |
902 | bool match_data, uint64_t data, | |
903 | EventNotifier *e) | |
80a1ea37 | 904 | { |
d22b096e | 905 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
906 | int r; |
907 | ||
44c3f8f7 | 908 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
909 | data, true, int128_get64(section->size), |
910 | match_data); | |
80a1ea37 | 911 | if (r < 0) { |
e346bcbf YK |
912 | fprintf(stderr, "%s: error adding ioeventfd: %s (%d)\n", |
913 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
914 | abort(); |
915 | } | |
916 | } | |
917 | ||
d22b096e AK |
918 | static void kvm_io_ioeventfd_del(MemoryListener *listener, |
919 | MemoryRegionSection *section, | |
920 | bool match_data, uint64_t data, | |
921 | EventNotifier *e) | |
80a1ea37 AK |
922 | |
923 | { | |
d22b096e | 924 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
925 | int r; |
926 | ||
44c3f8f7 | 927 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
928 | data, false, int128_get64(section->size), |
929 | match_data); | |
80a1ea37 | 930 | if (r < 0) { |
e346bcbf YK |
931 | fprintf(stderr, "%s: error deleting ioeventfd: %s (%d)\n", |
932 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
933 | abort(); |
934 | } | |
935 | } | |
936 | ||
38bfe691 PB |
937 | void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml, |
938 | AddressSpace *as, int as_id) | |
7bbda04c PB |
939 | { |
940 | int i; | |
941 | ||
942 | kml->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot)); | |
38bfe691 | 943 | kml->as_id = as_id; |
7bbda04c PB |
944 | |
945 | for (i = 0; i < s->nr_slots; i++) { | |
946 | kml->slots[i].slot = i; | |
947 | } | |
948 | ||
949 | kml->listener.region_add = kvm_region_add; | |
950 | kml->listener.region_del = kvm_region_del; | |
951 | kml->listener.log_start = kvm_log_start; | |
952 | kml->listener.log_stop = kvm_log_stop; | |
953 | kml->listener.log_sync = kvm_log_sync; | |
954 | kml->listener.priority = 10; | |
955 | ||
956 | memory_listener_register(&kml->listener, as); | |
957 | } | |
d22b096e AK |
958 | |
959 | static MemoryListener kvm_io_listener = { | |
d22b096e AK |
960 | .eventfd_add = kvm_io_ioeventfd_add, |
961 | .eventfd_del = kvm_io_ioeventfd_del, | |
72e22d2f | 962 | .priority = 10, |
7b8f3b78 MT |
963 | }; |
964 | ||
3889c3fa | 965 | int kvm_set_irq(KVMState *s, int irq, int level) |
84b058d7 JK |
966 | { |
967 | struct kvm_irq_level event; | |
968 | int ret; | |
969 | ||
7ae26bd4 | 970 | assert(kvm_async_interrupts_enabled()); |
84b058d7 JK |
971 | |
972 | event.level = level; | |
973 | event.irq = irq; | |
e333cd69 | 974 | ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event); |
84b058d7 | 975 | if (ret < 0) { |
3889c3fa | 976 | perror("kvm_set_irq"); |
84b058d7 JK |
977 | abort(); |
978 | } | |
979 | ||
e333cd69 | 980 | return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status; |
84b058d7 JK |
981 | } |
982 | ||
983 | #ifdef KVM_CAP_IRQ_ROUTING | |
d3d3bef0 JK |
984 | typedef struct KVMMSIRoute { |
985 | struct kvm_irq_routing_entry kroute; | |
986 | QTAILQ_ENTRY(KVMMSIRoute) entry; | |
987 | } KVMMSIRoute; | |
988 | ||
84b058d7 JK |
989 | static void set_gsi(KVMState *s, unsigned int gsi) |
990 | { | |
8269fb70 | 991 | set_bit(gsi, s->used_gsi_bitmap); |
84b058d7 JK |
992 | } |
993 | ||
04fa27f5 JK |
994 | static void clear_gsi(KVMState *s, unsigned int gsi) |
995 | { | |
8269fb70 | 996 | clear_bit(gsi, s->used_gsi_bitmap); |
04fa27f5 JK |
997 | } |
998 | ||
7b774593 | 999 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 | 1000 | { |
04fa27f5 | 1001 | int gsi_count, i; |
84b058d7 | 1002 | |
00008418 | 1003 | gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1; |
84b058d7 | 1004 | if (gsi_count > 0) { |
84b058d7 | 1005 | /* Round up so we can search ints using ffs */ |
8269fb70 | 1006 | s->used_gsi_bitmap = bitmap_new(gsi_count); |
4e2e4e63 | 1007 | s->gsi_count = gsi_count; |
84b058d7 JK |
1008 | } |
1009 | ||
1010 | s->irq_routes = g_malloc0(sizeof(*s->irq_routes)); | |
1011 | s->nr_allocated_irq_routes = 0; | |
1012 | ||
50bf31b9 | 1013 | if (!kvm_direct_msi_allowed) { |
4a3adebb JK |
1014 | for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) { |
1015 | QTAILQ_INIT(&s->msi_hashtab[i]); | |
1016 | } | |
04fa27f5 JK |
1017 | } |
1018 | ||
84b058d7 JK |
1019 | kvm_arch_init_irq_routing(s); |
1020 | } | |
1021 | ||
cb925cf9 | 1022 | void kvm_irqchip_commit_routes(KVMState *s) |
e7b20308 JK |
1023 | { |
1024 | int ret; | |
1025 | ||
7005f7f8 PX |
1026 | if (kvm_gsi_direct_mapping()) { |
1027 | return; | |
1028 | } | |
1029 | ||
1030 | if (!kvm_gsi_routing_enabled()) { | |
1031 | return; | |
1032 | } | |
1033 | ||
e7b20308 | 1034 | s->irq_routes->flags = 0; |
54a6c11b | 1035 | trace_kvm_irqchip_commit_routes(); |
e7b20308 JK |
1036 | ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); |
1037 | assert(ret == 0); | |
1038 | } | |
1039 | ||
84b058d7 JK |
1040 | static void kvm_add_routing_entry(KVMState *s, |
1041 | struct kvm_irq_routing_entry *entry) | |
1042 | { | |
1043 | struct kvm_irq_routing_entry *new; | |
1044 | int n, size; | |
1045 | ||
1046 | if (s->irq_routes->nr == s->nr_allocated_irq_routes) { | |
1047 | n = s->nr_allocated_irq_routes * 2; | |
1048 | if (n < 64) { | |
1049 | n = 64; | |
1050 | } | |
1051 | size = sizeof(struct kvm_irq_routing); | |
1052 | size += n * sizeof(*new); | |
1053 | s->irq_routes = g_realloc(s->irq_routes, size); | |
1054 | s->nr_allocated_irq_routes = n; | |
1055 | } | |
1056 | n = s->irq_routes->nr++; | |
1057 | new = &s->irq_routes->entries[n]; | |
0fbc2074 MT |
1058 | |
1059 | *new = *entry; | |
84b058d7 JK |
1060 | |
1061 | set_gsi(s, entry->gsi); | |
1062 | } | |
1063 | ||
cc57407e JK |
1064 | static int kvm_update_routing_entry(KVMState *s, |
1065 | struct kvm_irq_routing_entry *new_entry) | |
1066 | { | |
1067 | struct kvm_irq_routing_entry *entry; | |
1068 | int n; | |
1069 | ||
1070 | for (n = 0; n < s->irq_routes->nr; n++) { | |
1071 | entry = &s->irq_routes->entries[n]; | |
1072 | if (entry->gsi != new_entry->gsi) { | |
1073 | continue; | |
1074 | } | |
1075 | ||
40509f7f MT |
1076 | if(!memcmp(entry, new_entry, sizeof *entry)) { |
1077 | return 0; | |
1078 | } | |
1079 | ||
0fbc2074 | 1080 | *entry = *new_entry; |
cc57407e | 1081 | |
cc57407e JK |
1082 | return 0; |
1083 | } | |
1084 | ||
1085 | return -ESRCH; | |
1086 | } | |
1087 | ||
1df186df | 1088 | void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin) |
84b058d7 | 1089 | { |
0fbc2074 | 1090 | struct kvm_irq_routing_entry e = {}; |
84b058d7 | 1091 | |
4e2e4e63 JK |
1092 | assert(pin < s->gsi_count); |
1093 | ||
84b058d7 JK |
1094 | e.gsi = irq; |
1095 | e.type = KVM_IRQ_ROUTING_IRQCHIP; | |
1096 | e.flags = 0; | |
1097 | e.u.irqchip.irqchip = irqchip; | |
1098 | e.u.irqchip.pin = pin; | |
1099 | kvm_add_routing_entry(s, &e); | |
1100 | } | |
1101 | ||
1e2aa8be | 1102 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
04fa27f5 JK |
1103 | { |
1104 | struct kvm_irq_routing_entry *e; | |
1105 | int i; | |
1106 | ||
76fe21de AK |
1107 | if (kvm_gsi_direct_mapping()) { |
1108 | return; | |
1109 | } | |
1110 | ||
04fa27f5 JK |
1111 | for (i = 0; i < s->irq_routes->nr; i++) { |
1112 | e = &s->irq_routes->entries[i]; | |
1113 | if (e->gsi == virq) { | |
1114 | s->irq_routes->nr--; | |
1115 | *e = s->irq_routes->entries[s->irq_routes->nr]; | |
1116 | } | |
1117 | } | |
1118 | clear_gsi(s, virq); | |
38d87493 | 1119 | kvm_arch_release_virq_post(virq); |
9ba35d0b | 1120 | trace_kvm_irqchip_release_virq(virq); |
04fa27f5 JK |
1121 | } |
1122 | ||
1123 | static unsigned int kvm_hash_msi(uint32_t data) | |
1124 | { | |
1125 | /* This is optimized for IA32 MSI layout. However, no other arch shall | |
1126 | * repeat the mistake of not providing a direct MSI injection API. */ | |
1127 | return data & 0xff; | |
1128 | } | |
1129 | ||
1130 | static void kvm_flush_dynamic_msi_routes(KVMState *s) | |
1131 | { | |
1132 | KVMMSIRoute *route, *next; | |
1133 | unsigned int hash; | |
1134 | ||
1135 | for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) { | |
1136 | QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) { | |
1137 | kvm_irqchip_release_virq(s, route->kroute.gsi); | |
1138 | QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry); | |
1139 | g_free(route); | |
1140 | } | |
1141 | } | |
1142 | } | |
1143 | ||
1144 | static int kvm_irqchip_get_virq(KVMState *s) | |
1145 | { | |
8269fb70 | 1146 | int next_virq; |
04fa27f5 | 1147 | |
bdf02631 WM |
1148 | /* |
1149 | * PIC and IOAPIC share the first 16 GSI numbers, thus the available | |
1150 | * GSI numbers are more than the number of IRQ route. Allocating a GSI | |
1151 | * number can succeed even though a new route entry cannot be added. | |
1152 | * When this happens, flush dynamic MSI entries to free IRQ route entries. | |
1153 | */ | |
50bf31b9 | 1154 | if (!kvm_direct_msi_allowed && s->irq_routes->nr == s->gsi_count) { |
bdf02631 WM |
1155 | kvm_flush_dynamic_msi_routes(s); |
1156 | } | |
1157 | ||
04fa27f5 | 1158 | /* Return the lowest unused GSI in the bitmap */ |
8269fb70 WY |
1159 | next_virq = find_first_zero_bit(s->used_gsi_bitmap, s->gsi_count); |
1160 | if (next_virq >= s->gsi_count) { | |
1161 | return -ENOSPC; | |
1162 | } else { | |
1163 | return next_virq; | |
04fa27f5 | 1164 | } |
04fa27f5 JK |
1165 | } |
1166 | ||
1167 | static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg) | |
1168 | { | |
1169 | unsigned int hash = kvm_hash_msi(msg.data); | |
1170 | KVMMSIRoute *route; | |
1171 | ||
1172 | QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) { | |
1173 | if (route->kroute.u.msi.address_lo == (uint32_t)msg.address && | |
1174 | route->kroute.u.msi.address_hi == (msg.address >> 32) && | |
d07cc1f1 | 1175 | route->kroute.u.msi.data == le32_to_cpu(msg.data)) { |
04fa27f5 JK |
1176 | return route; |
1177 | } | |
1178 | } | |
1179 | return NULL; | |
1180 | } | |
1181 | ||
1182 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1183 | { | |
4a3adebb | 1184 | struct kvm_msi msi; |
04fa27f5 JK |
1185 | KVMMSIRoute *route; |
1186 | ||
50bf31b9 | 1187 | if (kvm_direct_msi_allowed) { |
4a3adebb JK |
1188 | msi.address_lo = (uint32_t)msg.address; |
1189 | msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1190 | msi.data = le32_to_cpu(msg.data); |
4a3adebb JK |
1191 | msi.flags = 0; |
1192 | memset(msi.pad, 0, sizeof(msi.pad)); | |
1193 | ||
1194 | return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi); | |
1195 | } | |
1196 | ||
04fa27f5 JK |
1197 | route = kvm_lookup_msi_route(s, msg); |
1198 | if (!route) { | |
e7b20308 | 1199 | int virq; |
04fa27f5 JK |
1200 | |
1201 | virq = kvm_irqchip_get_virq(s); | |
1202 | if (virq < 0) { | |
1203 | return virq; | |
1204 | } | |
1205 | ||
0fbc2074 | 1206 | route = g_malloc0(sizeof(KVMMSIRoute)); |
04fa27f5 JK |
1207 | route->kroute.gsi = virq; |
1208 | route->kroute.type = KVM_IRQ_ROUTING_MSI; | |
1209 | route->kroute.flags = 0; | |
1210 | route->kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1211 | route->kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1212 | route->kroute.u.msi.data = le32_to_cpu(msg.data); |
04fa27f5 JK |
1213 | |
1214 | kvm_add_routing_entry(s, &route->kroute); | |
cb925cf9 | 1215 | kvm_irqchip_commit_routes(s); |
04fa27f5 JK |
1216 | |
1217 | QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route, | |
1218 | entry); | |
04fa27f5 JK |
1219 | } |
1220 | ||
1221 | assert(route->kroute.type == KVM_IRQ_ROUTING_MSI); | |
1222 | ||
3889c3fa | 1223 | return kvm_set_irq(s, route->kroute.gsi, 1); |
04fa27f5 JK |
1224 | } |
1225 | ||
d1f6af6a | 1226 | int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) |
92b4e489 | 1227 | { |
0fbc2074 | 1228 | struct kvm_irq_routing_entry kroute = {}; |
92b4e489 | 1229 | int virq; |
d1f6af6a PX |
1230 | MSIMessage msg = {0, 0}; |
1231 | ||
88c725c7 | 1232 | if (pci_available && dev) { |
e1d4fb2d | 1233 | msg = pci_get_msi_message(dev, vector); |
d1f6af6a | 1234 | } |
92b4e489 | 1235 | |
76fe21de | 1236 | if (kvm_gsi_direct_mapping()) { |
1850b6b7 | 1237 | return kvm_arch_msi_data_to_gsi(msg.data); |
76fe21de AK |
1238 | } |
1239 | ||
f3e1bed8 | 1240 | if (!kvm_gsi_routing_enabled()) { |
92b4e489 JK |
1241 | return -ENOSYS; |
1242 | } | |
1243 | ||
1244 | virq = kvm_irqchip_get_virq(s); | |
1245 | if (virq < 0) { | |
1246 | return virq; | |
1247 | } | |
1248 | ||
1249 | kroute.gsi = virq; | |
1250 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1251 | kroute.flags = 0; | |
1252 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1253 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1254 | kroute.u.msi.data = le32_to_cpu(msg.data); |
88c725c7 | 1255 | if (pci_available && kvm_msi_devid_required()) { |
767a554a PF |
1256 | kroute.flags = KVM_MSI_VALID_DEVID; |
1257 | kroute.u.msi.devid = pci_requester_id(dev); | |
1258 | } | |
dc9f06ca | 1259 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { |
9e03a040 FB |
1260 | kvm_irqchip_release_virq(s, virq); |
1261 | return -EINVAL; | |
1262 | } | |
92b4e489 | 1263 | |
9ba35d0b PX |
1264 | trace_kvm_irqchip_add_msi_route(dev ? dev->name : (char *)"N/A", |
1265 | vector, virq); | |
54a6c11b | 1266 | |
92b4e489 | 1267 | kvm_add_routing_entry(s, &kroute); |
38d87493 | 1268 | kvm_arch_add_msi_route_post(&kroute, vector, dev); |
cb925cf9 | 1269 | kvm_irqchip_commit_routes(s); |
92b4e489 JK |
1270 | |
1271 | return virq; | |
1272 | } | |
1273 | ||
dc9f06ca PF |
1274 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg, |
1275 | PCIDevice *dev) | |
cc57407e | 1276 | { |
0fbc2074 | 1277 | struct kvm_irq_routing_entry kroute = {}; |
cc57407e | 1278 | |
76fe21de AK |
1279 | if (kvm_gsi_direct_mapping()) { |
1280 | return 0; | |
1281 | } | |
1282 | ||
cc57407e JK |
1283 | if (!kvm_irqchip_in_kernel()) { |
1284 | return -ENOSYS; | |
1285 | } | |
1286 | ||
1287 | kroute.gsi = virq; | |
1288 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1289 | kroute.flags = 0; | |
1290 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1291 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1292 | kroute.u.msi.data = le32_to_cpu(msg.data); |
88c725c7 | 1293 | if (pci_available && kvm_msi_devid_required()) { |
767a554a PF |
1294 | kroute.flags = KVM_MSI_VALID_DEVID; |
1295 | kroute.u.msi.devid = pci_requester_id(dev); | |
1296 | } | |
dc9f06ca | 1297 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { |
9e03a040 FB |
1298 | return -EINVAL; |
1299 | } | |
cc57407e | 1300 | |
54a6c11b PX |
1301 | trace_kvm_irqchip_update_msi_route(virq); |
1302 | ||
cc57407e JK |
1303 | return kvm_update_routing_entry(s, &kroute); |
1304 | } | |
1305 | ||
ca916d37 VM |
1306 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int rfd, int virq, |
1307 | bool assign) | |
39853bbc JK |
1308 | { |
1309 | struct kvm_irqfd irqfd = { | |
1310 | .fd = fd, | |
1311 | .gsi = virq, | |
1312 | .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN, | |
1313 | }; | |
1314 | ||
ca916d37 VM |
1315 | if (rfd != -1) { |
1316 | irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE; | |
1317 | irqfd.resamplefd = rfd; | |
1318 | } | |
1319 | ||
cc7e0ddf | 1320 | if (!kvm_irqfds_enabled()) { |
39853bbc JK |
1321 | return -ENOSYS; |
1322 | } | |
1323 | ||
1324 | return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd); | |
1325 | } | |
1326 | ||
d426d9fb CH |
1327 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
1328 | { | |
e9af2fef | 1329 | struct kvm_irq_routing_entry kroute = {}; |
d426d9fb CH |
1330 | int virq; |
1331 | ||
1332 | if (!kvm_gsi_routing_enabled()) { | |
1333 | return -ENOSYS; | |
1334 | } | |
1335 | ||
1336 | virq = kvm_irqchip_get_virq(s); | |
1337 | if (virq < 0) { | |
1338 | return virq; | |
1339 | } | |
1340 | ||
1341 | kroute.gsi = virq; | |
1342 | kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER; | |
1343 | kroute.flags = 0; | |
1344 | kroute.u.adapter.summary_addr = adapter->summary_addr; | |
1345 | kroute.u.adapter.ind_addr = adapter->ind_addr; | |
1346 | kroute.u.adapter.summary_offset = adapter->summary_offset; | |
1347 | kroute.u.adapter.ind_offset = adapter->ind_offset; | |
1348 | kroute.u.adapter.adapter_id = adapter->adapter_id; | |
1349 | ||
1350 | kvm_add_routing_entry(s, &kroute); | |
d426d9fb CH |
1351 | |
1352 | return virq; | |
1353 | } | |
1354 | ||
977a8d9c AS |
1355 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) |
1356 | { | |
1357 | struct kvm_irq_routing_entry kroute = {}; | |
1358 | int virq; | |
1359 | ||
1360 | if (!kvm_gsi_routing_enabled()) { | |
1361 | return -ENOSYS; | |
1362 | } | |
1363 | if (!kvm_check_extension(s, KVM_CAP_HYPERV_SYNIC)) { | |
1364 | return -ENOSYS; | |
1365 | } | |
1366 | virq = kvm_irqchip_get_virq(s); | |
1367 | if (virq < 0) { | |
1368 | return virq; | |
1369 | } | |
1370 | ||
1371 | kroute.gsi = virq; | |
1372 | kroute.type = KVM_IRQ_ROUTING_HV_SINT; | |
1373 | kroute.flags = 0; | |
1374 | kroute.u.hv_sint.vcpu = vcpu; | |
1375 | kroute.u.hv_sint.sint = sint; | |
1376 | ||
1377 | kvm_add_routing_entry(s, &kroute); | |
1378 | kvm_irqchip_commit_routes(s); | |
1379 | ||
1380 | return virq; | |
1381 | } | |
1382 | ||
84b058d7 JK |
1383 | #else /* !KVM_CAP_IRQ_ROUTING */ |
1384 | ||
7b774593 | 1385 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 JK |
1386 | { |
1387 | } | |
04fa27f5 | 1388 | |
d3d3bef0 JK |
1389 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
1390 | { | |
1391 | } | |
1392 | ||
04fa27f5 JK |
1393 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) |
1394 | { | |
1395 | abort(); | |
1396 | } | |
92b4e489 | 1397 | |
d1f6af6a | 1398 | int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) |
92b4e489 | 1399 | { |
df410675 | 1400 | return -ENOSYS; |
92b4e489 | 1401 | } |
39853bbc | 1402 | |
d426d9fb CH |
1403 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
1404 | { | |
1405 | return -ENOSYS; | |
1406 | } | |
1407 | ||
977a8d9c AS |
1408 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) |
1409 | { | |
1410 | return -ENOSYS; | |
1411 | } | |
1412 | ||
39853bbc JK |
1413 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign) |
1414 | { | |
1415 | abort(); | |
1416 | } | |
dabe3143 MT |
1417 | |
1418 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) | |
1419 | { | |
1420 | return -ENOSYS; | |
1421 | } | |
84b058d7 JK |
1422 | #endif /* !KVM_CAP_IRQ_ROUTING */ |
1423 | ||
1c9b71a7 EA |
1424 | int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, |
1425 | EventNotifier *rn, int virq) | |
39853bbc | 1426 | { |
ca916d37 VM |
1427 | return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), |
1428 | rn ? event_notifier_get_fd(rn) : -1, virq, true); | |
39853bbc JK |
1429 | } |
1430 | ||
1c9b71a7 EA |
1431 | int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, |
1432 | int virq) | |
15b2bd18 | 1433 | { |
ca916d37 VM |
1434 | return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), -1, virq, |
1435 | false); | |
15b2bd18 PB |
1436 | } |
1437 | ||
197e3524 EA |
1438 | int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, |
1439 | EventNotifier *rn, qemu_irq irq) | |
1440 | { | |
1441 | gpointer key, gsi; | |
1442 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
1443 | ||
1444 | if (!found) { | |
1445 | return -ENXIO; | |
1446 | } | |
1447 | return kvm_irqchip_add_irqfd_notifier_gsi(s, n, rn, GPOINTER_TO_INT(gsi)); | |
1448 | } | |
1449 | ||
1450 | int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, | |
1451 | qemu_irq irq) | |
1452 | { | |
1453 | gpointer key, gsi; | |
1454 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
1455 | ||
1456 | if (!found) { | |
1457 | return -ENXIO; | |
1458 | } | |
1459 | return kvm_irqchip_remove_irqfd_notifier_gsi(s, n, GPOINTER_TO_INT(gsi)); | |
1460 | } | |
1461 | ||
1462 | void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi) | |
1463 | { | |
1464 | g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi)); | |
1465 | } | |
1466 | ||
8db4936b | 1467 | static void kvm_irqchip_create(MachineState *machine, KVMState *s) |
84b058d7 | 1468 | { |
84b058d7 JK |
1469 | int ret; |
1470 | ||
8db4936b PB |
1471 | if (kvm_check_extension(s, KVM_CAP_IRQCHIP)) { |
1472 | ; | |
1473 | } else if (kvm_check_extension(s, KVM_CAP_S390_IRQCHIP)) { | |
1474 | ret = kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0); | |
1475 | if (ret < 0) { | |
1476 | fprintf(stderr, "Enable kernel irqchip failed: %s\n", strerror(-ret)); | |
1477 | exit(1); | |
1478 | } | |
1479 | } else { | |
1480 | return; | |
84b058d7 JK |
1481 | } |
1482 | ||
d6032e06 CD |
1483 | /* First probe and see if there's a arch-specific hook to create the |
1484 | * in-kernel irqchip for us */ | |
15eafc2e | 1485 | ret = kvm_arch_irqchip_create(machine, s); |
8db4936b | 1486 | if (ret == 0) { |
15eafc2e PB |
1487 | if (machine_kernel_irqchip_split(machine)) { |
1488 | perror("Split IRQ chip mode not supported."); | |
1489 | exit(1); | |
1490 | } else { | |
1491 | ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); | |
1492 | } | |
8db4936b PB |
1493 | } |
1494 | if (ret < 0) { | |
1495 | fprintf(stderr, "Create kernel irqchip failed: %s\n", strerror(-ret)); | |
1496 | exit(1); | |
84b058d7 JK |
1497 | } |
1498 | ||
3d4b2649 | 1499 | kvm_kernel_irqchip = true; |
7ae26bd4 PM |
1500 | /* If we have an in-kernel IRQ chip then we must have asynchronous |
1501 | * interrupt delivery (though the reverse is not necessarily true) | |
1502 | */ | |
1503 | kvm_async_interrupts_allowed = true; | |
215e79c0 | 1504 | kvm_halt_in_kernel_allowed = true; |
84b058d7 JK |
1505 | |
1506 | kvm_init_irq_routing(s); | |
1507 | ||
197e3524 | 1508 | s->gsimap = g_hash_table_new(g_direct_hash, g_direct_equal); |
84b058d7 JK |
1509 | } |
1510 | ||
670436ce AJ |
1511 | /* Find number of supported CPUs using the recommended |
1512 | * procedure from the kernel API documentation to cope with | |
1513 | * older kernels that may be missing capabilities. | |
1514 | */ | |
1515 | static int kvm_recommended_vcpus(KVMState *s) | |
3ed444e9 | 1516 | { |
11748ba7 | 1517 | int ret = kvm_vm_check_extension(s, KVM_CAP_NR_VCPUS); |
670436ce AJ |
1518 | return (ret) ? ret : 4; |
1519 | } | |
3ed444e9 | 1520 | |
670436ce AJ |
1521 | static int kvm_max_vcpus(KVMState *s) |
1522 | { | |
1523 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS); | |
1524 | return (ret) ? ret : kvm_recommended_vcpus(s); | |
3ed444e9 DH |
1525 | } |
1526 | ||
f31e3266 GK |
1527 | static int kvm_max_vcpu_id(KVMState *s) |
1528 | { | |
1529 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPU_ID); | |
1530 | return (ret) ? ret : kvm_max_vcpus(s); | |
1531 | } | |
1532 | ||
41264b38 GK |
1533 | bool kvm_vcpu_id_is_valid(int vcpu_id) |
1534 | { | |
1535 | KVMState *s = KVM_STATE(current_machine->accelerator); | |
f31e3266 | 1536 | return vcpu_id >= 0 && vcpu_id < kvm_max_vcpu_id(s); |
41264b38 GK |
1537 | } |
1538 | ||
f6a1ef64 | 1539 | static int kvm_init(MachineState *ms) |
05330448 | 1540 | { |
f6a1ef64 | 1541 | MachineClass *mc = MACHINE_GET_CLASS(ms); |
168ccc11 JK |
1542 | static const char upgrade_note[] = |
1543 | "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" | |
1544 | "(see http://sourceforge.net/projects/kvm).\n"; | |
670436ce AJ |
1545 | struct { |
1546 | const char *name; | |
1547 | int num; | |
1548 | } num_cpus[] = { | |
5cc8767d LX |
1549 | { "SMP", ms->smp.cpus }, |
1550 | { "hotpluggable", ms->smp.max_cpus }, | |
670436ce AJ |
1551 | { NULL, } |
1552 | }, *nc = num_cpus; | |
1553 | int soft_vcpus_limit, hard_vcpus_limit; | |
05330448 | 1554 | KVMState *s; |
94a8d39a | 1555 | const KVMCapabilityInfo *missing_cap; |
05330448 | 1556 | int ret; |
7bbda04c | 1557 | int type = 0; |
135a129a | 1558 | const char *kvm_type; |
05330448 | 1559 | |
fc02086b | 1560 | s = KVM_STATE(ms->accelerator); |
05330448 | 1561 | |
3145fcb6 DG |
1562 | /* |
1563 | * On systems where the kernel can support different base page | |
1564 | * sizes, host page size may be different from TARGET_PAGE_SIZE, | |
1565 | * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum | |
1566 | * page size for the system though. | |
1567 | */ | |
1568 | assert(TARGET_PAGE_SIZE <= getpagesize()); | |
1569 | ||
aed6efb9 JH |
1570 | s->sigmask_len = 8; |
1571 | ||
e22a25c9 | 1572 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
72cf2d4f | 1573 | QTAILQ_INIT(&s->kvm_sw_breakpoints); |
e22a25c9 | 1574 | #endif |
4c055ab5 | 1575 | QLIST_INIT(&s->kvm_parked_vcpus); |
05330448 | 1576 | s->vmfd = -1; |
40ff6d7e | 1577 | s->fd = qemu_open("/dev/kvm", O_RDWR); |
05330448 AL |
1578 | if (s->fd == -1) { |
1579 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); | |
1580 | ret = -errno; | |
1581 | goto err; | |
1582 | } | |
1583 | ||
1584 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); | |
1585 | if (ret < KVM_API_VERSION) { | |
0e1dac6c | 1586 | if (ret >= 0) { |
05330448 | 1587 | ret = -EINVAL; |
a426e122 | 1588 | } |
05330448 AL |
1589 | fprintf(stderr, "kvm version too old\n"); |
1590 | goto err; | |
1591 | } | |
1592 | ||
1593 | if (ret > KVM_API_VERSION) { | |
1594 | ret = -EINVAL; | |
1595 | fprintf(stderr, "kvm version not supported\n"); | |
1596 | goto err; | |
1597 | } | |
1598 | ||
cf0f7cf9 | 1599 | kvm_immediate_exit = kvm_check_extension(s, KVM_CAP_IMMEDIATE_EXIT); |
fb541ca5 AW |
1600 | s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS); |
1601 | ||
1602 | /* If unspecified, use the default value */ | |
1603 | if (!s->nr_slots) { | |
1604 | s->nr_slots = 32; | |
1605 | } | |
1606 | ||
135a129a | 1607 | kvm_type = qemu_opt_get(qemu_get_machine_opts(), "kvm-type"); |
f1e29879 | 1608 | if (mc->kvm_type) { |
dc0ca80e | 1609 | type = mc->kvm_type(ms, kvm_type); |
135a129a | 1610 | } else if (kvm_type) { |
0e1dac6c | 1611 | ret = -EINVAL; |
135a129a AK |
1612 | fprintf(stderr, "Invalid argument kvm-type=%s\n", kvm_type); |
1613 | goto err; | |
1614 | } | |
1615 | ||
94ccff13 | 1616 | do { |
135a129a | 1617 | ret = kvm_ioctl(s, KVM_CREATE_VM, type); |
94ccff13 TK |
1618 | } while (ret == -EINTR); |
1619 | ||
1620 | if (ret < 0) { | |
521f438e | 1621 | fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret, |
94ccff13 TK |
1622 | strerror(-ret)); |
1623 | ||
0104dcac | 1624 | #ifdef TARGET_S390X |
2c80e996 CH |
1625 | if (ret == -EINVAL) { |
1626 | fprintf(stderr, | |
1627 | "Host kernel setup problem detected. Please verify:\n"); | |
1628 | fprintf(stderr, "- for kernels supporting the switch_amode or" | |
1629 | " user_mode parameters, whether\n"); | |
1630 | fprintf(stderr, | |
1631 | " user space is running in primary address space\n"); | |
1632 | fprintf(stderr, | |
1633 | "- for kernels supporting the vm.allocate_pgste sysctl, " | |
1634 | "whether it is enabled\n"); | |
1635 | } | |
0104dcac | 1636 | #endif |
05330448 | 1637 | goto err; |
0104dcac | 1638 | } |
05330448 | 1639 | |
94ccff13 | 1640 | s->vmfd = ret; |
11748ba7 GK |
1641 | |
1642 | /* check the vcpu limits */ | |
1643 | soft_vcpus_limit = kvm_recommended_vcpus(s); | |
1644 | hard_vcpus_limit = kvm_max_vcpus(s); | |
1645 | ||
1646 | while (nc->name) { | |
1647 | if (nc->num > soft_vcpus_limit) { | |
1648 | warn_report("Number of %s cpus requested (%d) exceeds " | |
1649 | "the recommended cpus supported by KVM (%d)", | |
1650 | nc->name, nc->num, soft_vcpus_limit); | |
1651 | ||
1652 | if (nc->num > hard_vcpus_limit) { | |
1653 | fprintf(stderr, "Number of %s cpus requested (%d) exceeds " | |
1654 | "the maximum cpus supported by KVM (%d)\n", | |
1655 | nc->name, nc->num, hard_vcpus_limit); | |
1656 | exit(1); | |
1657 | } | |
1658 | } | |
1659 | nc++; | |
1660 | } | |
1661 | ||
94a8d39a JK |
1662 | missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); |
1663 | if (!missing_cap) { | |
1664 | missing_cap = | |
1665 | kvm_check_extension_list(s, kvm_arch_required_capabilities); | |
05330448 | 1666 | } |
94a8d39a | 1667 | if (missing_cap) { |
ad7b8b33 | 1668 | ret = -EINVAL; |
94a8d39a JK |
1669 | fprintf(stderr, "kvm does not support %s\n%s", |
1670 | missing_cap->name, upgrade_note); | |
d85dc283 AL |
1671 | goto err; |
1672 | } | |
1673 | ||
ad7b8b33 | 1674 | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
e6d34aee PH |
1675 | s->coalesced_pio = s->coalesced_mmio && |
1676 | kvm_check_extension(s, KVM_CAP_COALESCED_PIO); | |
f65ed4c1 | 1677 | |
a0fb002c JK |
1678 | #ifdef KVM_CAP_VCPU_EVENTS |
1679 | s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); | |
1680 | #endif | |
1681 | ||
b0b1d690 JK |
1682 | s->robust_singlestep = |
1683 | kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); | |
b0b1d690 | 1684 | |
ff44f1a3 JK |
1685 | #ifdef KVM_CAP_DEBUGREGS |
1686 | s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); | |
1687 | #endif | |
1688 | ||
ebbfef2f LA |
1689 | s->max_nested_state_len = kvm_check_extension(s, KVM_CAP_NESTED_STATE); |
1690 | ||
d3d3bef0 | 1691 | #ifdef KVM_CAP_IRQ_ROUTING |
50bf31b9 | 1692 | kvm_direct_msi_allowed = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0); |
d3d3bef0 | 1693 | #endif |
4a3adebb | 1694 | |
3ab73842 JK |
1695 | s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3); |
1696 | ||
e333cd69 | 1697 | s->irq_set_ioctl = KVM_IRQ_LINE; |
8732fbd2 | 1698 | if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) { |
e333cd69 | 1699 | s->irq_set_ioctl = KVM_IRQ_LINE_STATUS; |
8732fbd2 PM |
1700 | } |
1701 | ||
df9c8b75 JJ |
1702 | kvm_readonly_mem_allowed = |
1703 | (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0); | |
df9c8b75 | 1704 | |
69e03ae6 NN |
1705 | kvm_eventfds_allowed = |
1706 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0); | |
1707 | ||
f41389ae EA |
1708 | kvm_irqfds_allowed = |
1709 | (kvm_check_extension(s, KVM_CAP_IRQFD) > 0); | |
1710 | ||
1711 | kvm_resamplefds_allowed = | |
1712 | (kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0); | |
1713 | ||
d0a073a1 DD |
1714 | kvm_vm_attributes_allowed = |
1715 | (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0); | |
1716 | ||
35108223 JW |
1717 | kvm_ioeventfd_any_length_allowed = |
1718 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD_ANY_LENGTH) > 0); | |
1719 | ||
d870cfde GA |
1720 | kvm_state = s; |
1721 | ||
b20e3780 BS |
1722 | /* |
1723 | * if memory encryption object is specified then initialize the memory | |
1724 | * encryption context. | |
1725 | */ | |
1726 | if (ms->memory_encryption) { | |
1727 | kvm_state->memcrypt_handle = sev_guest_init(ms->memory_encryption); | |
1728 | if (!kvm_state->memcrypt_handle) { | |
1729 | ret = -1; | |
1730 | goto err; | |
1731 | } | |
54e89539 BS |
1732 | |
1733 | kvm_state->memcrypt_encrypt_data = sev_encrypt_data; | |
b20e3780 BS |
1734 | } |
1735 | ||
b16565b3 | 1736 | ret = kvm_arch_init(ms, s); |
a426e122 | 1737 | if (ret < 0) { |
05330448 | 1738 | goto err; |
a426e122 | 1739 | } |
05330448 | 1740 | |
8db4936b PB |
1741 | if (machine_kernel_irqchip_allowed(ms)) { |
1742 | kvm_irqchip_create(ms, s); | |
84b058d7 JK |
1743 | } |
1744 | ||
8c56c1a5 PF |
1745 | if (kvm_eventfds_allowed) { |
1746 | s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add; | |
1747 | s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del; | |
1748 | } | |
e6d34aee PH |
1749 | s->memory_listener.listener.coalesced_io_add = kvm_coalesce_mmio_region; |
1750 | s->memory_listener.listener.coalesced_io_del = kvm_uncoalesce_mmio_region; | |
7bbda04c PB |
1751 | |
1752 | kvm_memory_listener_register(s, &s->memory_listener, | |
38bfe691 | 1753 | &address_space_memory, 0); |
7bbda04c PB |
1754 | memory_listener_register(&kvm_io_listener, |
1755 | &address_space_io); | |
e6d34aee PH |
1756 | memory_listener_register(&kvm_coalesced_pio_listener, |
1757 | &address_space_io); | |
05330448 | 1758 | |
d2f2b8a7 SH |
1759 | s->many_ioeventfds = kvm_check_many_ioeventfds(); |
1760 | ||
62dd4eda | 1761 | s->sync_mmu = !!kvm_vm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); |
f5948942 AW |
1762 | if (!s->sync_mmu) { |
1763 | qemu_balloon_inhibit(true); | |
1764 | } | |
62dd4eda | 1765 | |
05330448 AL |
1766 | return 0; |
1767 | ||
1768 | err: | |
0e1dac6c | 1769 | assert(ret < 0); |
6d1cc321 SW |
1770 | if (s->vmfd >= 0) { |
1771 | close(s->vmfd); | |
1772 | } | |
1773 | if (s->fd != -1) { | |
1774 | close(s->fd); | |
05330448 | 1775 | } |
7bbda04c | 1776 | g_free(s->memory_listener.slots); |
05330448 AL |
1777 | |
1778 | return ret; | |
1779 | } | |
1780 | ||
aed6efb9 JH |
1781 | void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len) |
1782 | { | |
1783 | s->sigmask_len = sigmask_len; | |
1784 | } | |
1785 | ||
4c663752 PB |
1786 | static void kvm_handle_io(uint16_t port, MemTxAttrs attrs, void *data, int direction, |
1787 | int size, uint32_t count) | |
05330448 AL |
1788 | { |
1789 | int i; | |
1790 | uint8_t *ptr = data; | |
1791 | ||
1792 | for (i = 0; i < count; i++) { | |
4c663752 | 1793 | address_space_rw(&address_space_io, port, attrs, |
5c9eb028 | 1794 | ptr, size, |
354678c5 | 1795 | direction == KVM_EXIT_IO_OUT); |
05330448 AL |
1796 | ptr += size; |
1797 | } | |
05330448 AL |
1798 | } |
1799 | ||
5326ab55 | 1800 | static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run) |
7c80eef8 | 1801 | { |
977c7b6d RK |
1802 | fprintf(stderr, "KVM internal error. Suberror: %d\n", |
1803 | run->internal.suberror); | |
1804 | ||
7c80eef8 MT |
1805 | if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) { |
1806 | int i; | |
1807 | ||
7c80eef8 MT |
1808 | for (i = 0; i < run->internal.ndata; ++i) { |
1809 | fprintf(stderr, "extra data[%d]: %"PRIx64"\n", | |
1810 | i, (uint64_t)run->internal.data[i]); | |
1811 | } | |
1812 | } | |
7c80eef8 MT |
1813 | if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) { |
1814 | fprintf(stderr, "emulation failure\n"); | |
20d695a9 | 1815 | if (!kvm_arch_stop_on_emulation_error(cpu)) { |
90c84c56 | 1816 | cpu_dump_state(cpu, stderr, CPU_DUMP_CODE); |
d73cd8f4 | 1817 | return EXCP_INTERRUPT; |
a426e122 | 1818 | } |
7c80eef8 MT |
1819 | } |
1820 | /* FIXME: Should trigger a qmp message to let management know | |
1821 | * something went wrong. | |
1822 | */ | |
73aaec4a | 1823 | return -1; |
7c80eef8 | 1824 | } |
7c80eef8 | 1825 | |
62a2744c | 1826 | void kvm_flush_coalesced_mmio_buffer(void) |
f65ed4c1 | 1827 | { |
f65ed4c1 | 1828 | KVMState *s = kvm_state; |
1cae88b9 AK |
1829 | |
1830 | if (s->coalesced_flush_in_progress) { | |
1831 | return; | |
1832 | } | |
1833 | ||
1834 | s->coalesced_flush_in_progress = true; | |
1835 | ||
62a2744c SY |
1836 | if (s->coalesced_mmio_ring) { |
1837 | struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring; | |
f65ed4c1 AL |
1838 | while (ring->first != ring->last) { |
1839 | struct kvm_coalesced_mmio *ent; | |
1840 | ||
1841 | ent = &ring->coalesced_mmio[ring->first]; | |
1842 | ||
e6d34aee PH |
1843 | if (ent->pio == 1) { |
1844 | address_space_rw(&address_space_io, ent->phys_addr, | |
1845 | MEMTXATTRS_UNSPECIFIED, ent->data, | |
1846 | ent->len, true); | |
1847 | } else { | |
1848 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); | |
1849 | } | |
85199474 | 1850 | smp_wmb(); |
f65ed4c1 AL |
1851 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; |
1852 | } | |
1853 | } | |
1cae88b9 AK |
1854 | |
1855 | s->coalesced_flush_in_progress = false; | |
f65ed4c1 AL |
1856 | } |
1857 | ||
14e6fe12 | 1858 | static void do_kvm_cpu_synchronize_state(CPUState *cpu, run_on_cpu_data arg) |
4c0960c0 | 1859 | { |
99f31832 | 1860 | if (!cpu->vcpu_dirty) { |
20d695a9 | 1861 | kvm_arch_get_registers(cpu); |
99f31832 | 1862 | cpu->vcpu_dirty = true; |
4c0960c0 AK |
1863 | } |
1864 | } | |
1865 | ||
dd1750d7 | 1866 | void kvm_cpu_synchronize_state(CPUState *cpu) |
2705d56a | 1867 | { |
99f31832 | 1868 | if (!cpu->vcpu_dirty) { |
14e6fe12 | 1869 | run_on_cpu(cpu, do_kvm_cpu_synchronize_state, RUN_ON_CPU_NULL); |
a426e122 | 1870 | } |
2705d56a JK |
1871 | } |
1872 | ||
14e6fe12 | 1873 | static void do_kvm_cpu_synchronize_post_reset(CPUState *cpu, run_on_cpu_data arg) |
ea375f9a | 1874 | { |
20d695a9 | 1875 | kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE); |
99f31832 | 1876 | cpu->vcpu_dirty = false; |
ea375f9a JK |
1877 | } |
1878 | ||
c8e2085d DH |
1879 | void kvm_cpu_synchronize_post_reset(CPUState *cpu) |
1880 | { | |
14e6fe12 | 1881 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_reset, RUN_ON_CPU_NULL); |
c8e2085d DH |
1882 | } |
1883 | ||
14e6fe12 | 1884 | static void do_kvm_cpu_synchronize_post_init(CPUState *cpu, run_on_cpu_data arg) |
ea375f9a | 1885 | { |
20d695a9 | 1886 | kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE); |
99f31832 | 1887 | cpu->vcpu_dirty = false; |
ea375f9a JK |
1888 | } |
1889 | ||
c8e2085d DH |
1890 | void kvm_cpu_synchronize_post_init(CPUState *cpu) |
1891 | { | |
14e6fe12 | 1892 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, RUN_ON_CPU_NULL); |
c8e2085d DH |
1893 | } |
1894 | ||
75e972da DG |
1895 | static void do_kvm_cpu_synchronize_pre_loadvm(CPUState *cpu, run_on_cpu_data arg) |
1896 | { | |
99f31832 | 1897 | cpu->vcpu_dirty = true; |
75e972da DG |
1898 | } |
1899 | ||
1900 | void kvm_cpu_synchronize_pre_loadvm(CPUState *cpu) | |
1901 | { | |
1902 | run_on_cpu(cpu, do_kvm_cpu_synchronize_pre_loadvm, RUN_ON_CPU_NULL); | |
1903 | } | |
1904 | ||
2ae41db2 PB |
1905 | #ifdef KVM_HAVE_MCE_INJECTION |
1906 | static __thread void *pending_sigbus_addr; | |
1907 | static __thread int pending_sigbus_code; | |
1908 | static __thread bool have_sigbus_pending; | |
1909 | #endif | |
1910 | ||
cf0f7cf9 PB |
1911 | static void kvm_cpu_kick(CPUState *cpu) |
1912 | { | |
1913 | atomic_set(&cpu->kvm_run->immediate_exit, 1); | |
1914 | } | |
1915 | ||
1916 | static void kvm_cpu_kick_self(void) | |
1917 | { | |
1918 | if (kvm_immediate_exit) { | |
1919 | kvm_cpu_kick(current_cpu); | |
1920 | } else { | |
1921 | qemu_cpu_kick_self(); | |
1922 | } | |
1923 | } | |
1924 | ||
18268b60 PB |
1925 | static void kvm_eat_signals(CPUState *cpu) |
1926 | { | |
1927 | struct timespec ts = { 0, 0 }; | |
1928 | siginfo_t siginfo; | |
1929 | sigset_t waitset; | |
1930 | sigset_t chkset; | |
1931 | int r; | |
1932 | ||
cf0f7cf9 PB |
1933 | if (kvm_immediate_exit) { |
1934 | atomic_set(&cpu->kvm_run->immediate_exit, 0); | |
1935 | /* Write kvm_run->immediate_exit before the cpu->exit_request | |
1936 | * write in kvm_cpu_exec. | |
1937 | */ | |
1938 | smp_wmb(); | |
1939 | return; | |
1940 | } | |
1941 | ||
18268b60 PB |
1942 | sigemptyset(&waitset); |
1943 | sigaddset(&waitset, SIG_IPI); | |
1944 | ||
1945 | do { | |
1946 | r = sigtimedwait(&waitset, &siginfo, &ts); | |
1947 | if (r == -1 && !(errno == EAGAIN || errno == EINTR)) { | |
1948 | perror("sigtimedwait"); | |
1949 | exit(1); | |
1950 | } | |
1951 | ||
1952 | r = sigpending(&chkset); | |
1953 | if (r == -1) { | |
1954 | perror("sigpending"); | |
1955 | exit(1); | |
1956 | } | |
1957 | } while (sigismember(&chkset, SIG_IPI)); | |
1958 | } | |
1959 | ||
1458c363 | 1960 | int kvm_cpu_exec(CPUState *cpu) |
05330448 | 1961 | { |
f7575c96 | 1962 | struct kvm_run *run = cpu->kvm_run; |
7cbb533f | 1963 | int ret, run_ret; |
05330448 | 1964 | |
8c0d577e | 1965 | DPRINTF("kvm_cpu_exec()\n"); |
05330448 | 1966 | |
20d695a9 | 1967 | if (kvm_arch_process_async_events(cpu)) { |
c5c6679d | 1968 | atomic_set(&cpu->exit_request, 0); |
6792a57b | 1969 | return EXCP_HLT; |
9ccfac9e | 1970 | } |
0af691d7 | 1971 | |
4b8523ee | 1972 | qemu_mutex_unlock_iothread(); |
1d78a3c3 | 1973 | cpu_exec_start(cpu); |
4b8523ee | 1974 | |
9ccfac9e | 1975 | do { |
4c663752 PB |
1976 | MemTxAttrs attrs; |
1977 | ||
99f31832 | 1978 | if (cpu->vcpu_dirty) { |
20d695a9 | 1979 | kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE); |
99f31832 | 1980 | cpu->vcpu_dirty = false; |
4c0960c0 AK |
1981 | } |
1982 | ||
20d695a9 | 1983 | kvm_arch_pre_run(cpu, run); |
c5c6679d | 1984 | if (atomic_read(&cpu->exit_request)) { |
9ccfac9e JK |
1985 | DPRINTF("interrupt exit requested\n"); |
1986 | /* | |
1987 | * KVM requires us to reenter the kernel after IO exits to complete | |
1988 | * instruction emulation. This self-signal will ensure that we | |
1989 | * leave ASAP again. | |
1990 | */ | |
cf0f7cf9 | 1991 | kvm_cpu_kick_self(); |
9ccfac9e | 1992 | } |
9ccfac9e | 1993 | |
cf0f7cf9 PB |
1994 | /* Read cpu->exit_request before KVM_RUN reads run->immediate_exit. |
1995 | * Matching barrier in kvm_eat_signals. | |
1996 | */ | |
1997 | smp_rmb(); | |
1998 | ||
1bc22652 | 1999 | run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0); |
9ccfac9e | 2000 | |
4c663752 | 2001 | attrs = kvm_arch_post_run(cpu, run); |
05330448 | 2002 | |
2ae41db2 PB |
2003 | #ifdef KVM_HAVE_MCE_INJECTION |
2004 | if (unlikely(have_sigbus_pending)) { | |
2005 | qemu_mutex_lock_iothread(); | |
2006 | kvm_arch_on_sigbus_vcpu(cpu, pending_sigbus_code, | |
2007 | pending_sigbus_addr); | |
2008 | have_sigbus_pending = false; | |
2009 | qemu_mutex_unlock_iothread(); | |
2010 | } | |
2011 | #endif | |
2012 | ||
7cbb533f | 2013 | if (run_ret < 0) { |
dc77d341 JK |
2014 | if (run_ret == -EINTR || run_ret == -EAGAIN) { |
2015 | DPRINTF("io window exit\n"); | |
18268b60 | 2016 | kvm_eat_signals(cpu); |
d73cd8f4 | 2017 | ret = EXCP_INTERRUPT; |
dc77d341 JK |
2018 | break; |
2019 | } | |
7b011fbc ME |
2020 | fprintf(stderr, "error: kvm run failed %s\n", |
2021 | strerror(-run_ret)); | |
dae02ba5 LV |
2022 | #ifdef TARGET_PPC |
2023 | if (run_ret == -EBUSY) { | |
2024 | fprintf(stderr, | |
2025 | "This is probably because your SMT is enabled.\n" | |
2026 | "VCPU can only run on primary threads with all " | |
2027 | "secondary threads offline.\n"); | |
2028 | } | |
2029 | #endif | |
a85e130e PB |
2030 | ret = -1; |
2031 | break; | |
05330448 AL |
2032 | } |
2033 | ||
b76ac80a | 2034 | trace_kvm_run_exit(cpu->cpu_index, run->exit_reason); |
05330448 AL |
2035 | switch (run->exit_reason) { |
2036 | case KVM_EXIT_IO: | |
8c0d577e | 2037 | DPRINTF("handle_io\n"); |
80b7d2ef | 2038 | /* Called outside BQL */ |
4c663752 | 2039 | kvm_handle_io(run->io.port, attrs, |
b30e93e9 JK |
2040 | (uint8_t *)run + run->io.data_offset, |
2041 | run->io.direction, | |
2042 | run->io.size, | |
2043 | run->io.count); | |
d73cd8f4 | 2044 | ret = 0; |
05330448 AL |
2045 | break; |
2046 | case KVM_EXIT_MMIO: | |
8c0d577e | 2047 | DPRINTF("handle_mmio\n"); |
de7ea885 | 2048 | /* Called outside BQL */ |
4c663752 PB |
2049 | address_space_rw(&address_space_memory, |
2050 | run->mmio.phys_addr, attrs, | |
2051 | run->mmio.data, | |
2052 | run->mmio.len, | |
2053 | run->mmio.is_write); | |
d73cd8f4 | 2054 | ret = 0; |
05330448 AL |
2055 | break; |
2056 | case KVM_EXIT_IRQ_WINDOW_OPEN: | |
8c0d577e | 2057 | DPRINTF("irq_window_open\n"); |
d73cd8f4 | 2058 | ret = EXCP_INTERRUPT; |
05330448 AL |
2059 | break; |
2060 | case KVM_EXIT_SHUTDOWN: | |
8c0d577e | 2061 | DPRINTF("shutdown\n"); |
cf83f140 | 2062 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
d73cd8f4 | 2063 | ret = EXCP_INTERRUPT; |
05330448 AL |
2064 | break; |
2065 | case KVM_EXIT_UNKNOWN: | |
bb44e0d1 JK |
2066 | fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", |
2067 | (uint64_t)run->hw.hardware_exit_reason); | |
73aaec4a | 2068 | ret = -1; |
05330448 | 2069 | break; |
7c80eef8 | 2070 | case KVM_EXIT_INTERNAL_ERROR: |
5326ab55 | 2071 | ret = kvm_handle_internal_error(cpu, run); |
7c80eef8 | 2072 | break; |
99040447 PS |
2073 | case KVM_EXIT_SYSTEM_EVENT: |
2074 | switch (run->system_event.type) { | |
2075 | case KVM_SYSTEM_EVENT_SHUTDOWN: | |
cf83f140 | 2076 | qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); |
99040447 PS |
2077 | ret = EXCP_INTERRUPT; |
2078 | break; | |
2079 | case KVM_SYSTEM_EVENT_RESET: | |
cf83f140 | 2080 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
99040447 PS |
2081 | ret = EXCP_INTERRUPT; |
2082 | break; | |
7c207b90 | 2083 | case KVM_SYSTEM_EVENT_CRASH: |
d187e08d | 2084 | kvm_cpu_synchronize_state(cpu); |
7c207b90 | 2085 | qemu_mutex_lock_iothread(); |
c86f106b | 2086 | qemu_system_guest_panicked(cpu_get_crash_info(cpu)); |
7c207b90 AS |
2087 | qemu_mutex_unlock_iothread(); |
2088 | ret = 0; | |
2089 | break; | |
99040447 PS |
2090 | default: |
2091 | DPRINTF("kvm_arch_handle_exit\n"); | |
2092 | ret = kvm_arch_handle_exit(cpu, run); | |
2093 | break; | |
2094 | } | |
2095 | break; | |
05330448 | 2096 | default: |
8c0d577e | 2097 | DPRINTF("kvm_arch_handle_exit\n"); |
20d695a9 | 2098 | ret = kvm_arch_handle_exit(cpu, run); |
05330448 AL |
2099 | break; |
2100 | } | |
d73cd8f4 | 2101 | } while (ret == 0); |
05330448 | 2102 | |
1d78a3c3 | 2103 | cpu_exec_end(cpu); |
4b8523ee JK |
2104 | qemu_mutex_lock_iothread(); |
2105 | ||
73aaec4a | 2106 | if (ret < 0) { |
90c84c56 | 2107 | cpu_dump_state(cpu, stderr, CPU_DUMP_CODE); |
0461d5a6 | 2108 | vm_stop(RUN_STATE_INTERNAL_ERROR); |
becfc390 AL |
2109 | } |
2110 | ||
c5c6679d | 2111 | atomic_set(&cpu->exit_request, 0); |
05330448 AL |
2112 | return ret; |
2113 | } | |
2114 | ||
984b5181 | 2115 | int kvm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
2116 | { |
2117 | int ret; | |
984b5181 AL |
2118 | void *arg; |
2119 | va_list ap; | |
05330448 | 2120 | |
984b5181 AL |
2121 | va_start(ap, type); |
2122 | arg = va_arg(ap, void *); | |
2123 | va_end(ap); | |
2124 | ||
9c775729 | 2125 | trace_kvm_ioctl(type, arg); |
984b5181 | 2126 | ret = ioctl(s->fd, type, arg); |
a426e122 | 2127 | if (ret == -1) { |
05330448 | 2128 | ret = -errno; |
a426e122 | 2129 | } |
05330448 AL |
2130 | return ret; |
2131 | } | |
2132 | ||
984b5181 | 2133 | int kvm_vm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
2134 | { |
2135 | int ret; | |
984b5181 AL |
2136 | void *arg; |
2137 | va_list ap; | |
2138 | ||
2139 | va_start(ap, type); | |
2140 | arg = va_arg(ap, void *); | |
2141 | va_end(ap); | |
05330448 | 2142 | |
9c775729 | 2143 | trace_kvm_vm_ioctl(type, arg); |
984b5181 | 2144 | ret = ioctl(s->vmfd, type, arg); |
a426e122 | 2145 | if (ret == -1) { |
05330448 | 2146 | ret = -errno; |
a426e122 | 2147 | } |
05330448 AL |
2148 | return ret; |
2149 | } | |
2150 | ||
1bc22652 | 2151 | int kvm_vcpu_ioctl(CPUState *cpu, int type, ...) |
05330448 AL |
2152 | { |
2153 | int ret; | |
984b5181 AL |
2154 | void *arg; |
2155 | va_list ap; | |
2156 | ||
2157 | va_start(ap, type); | |
2158 | arg = va_arg(ap, void *); | |
2159 | va_end(ap); | |
05330448 | 2160 | |
9c775729 | 2161 | trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg); |
8737c51c | 2162 | ret = ioctl(cpu->kvm_fd, type, arg); |
a426e122 | 2163 | if (ret == -1) { |
05330448 | 2164 | ret = -errno; |
a426e122 | 2165 | } |
05330448 AL |
2166 | return ret; |
2167 | } | |
bd322087 | 2168 | |
0a6a7cca CD |
2169 | int kvm_device_ioctl(int fd, int type, ...) |
2170 | { | |
2171 | int ret; | |
2172 | void *arg; | |
2173 | va_list ap; | |
2174 | ||
2175 | va_start(ap, type); | |
2176 | arg = va_arg(ap, void *); | |
2177 | va_end(ap); | |
2178 | ||
2179 | trace_kvm_device_ioctl(fd, type, arg); | |
2180 | ret = ioctl(fd, type, arg); | |
2181 | if (ret == -1) { | |
2182 | ret = -errno; | |
2183 | } | |
2184 | return ret; | |
2185 | } | |
2186 | ||
d0a073a1 DD |
2187 | int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr) |
2188 | { | |
2189 | int ret; | |
2190 | struct kvm_device_attr attribute = { | |
2191 | .group = group, | |
2192 | .attr = attr, | |
2193 | }; | |
2194 | ||
2195 | if (!kvm_vm_attributes_allowed) { | |
2196 | return 0; | |
2197 | } | |
2198 | ||
2199 | ret = kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attribute); | |
2200 | /* kvm returns 0 on success for HAS_DEVICE_ATTR */ | |
2201 | return ret ? 0 : 1; | |
2202 | } | |
2203 | ||
4b3cfe72 PF |
2204 | int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr) |
2205 | { | |
2206 | struct kvm_device_attr attribute = { | |
2207 | .group = group, | |
2208 | .attr = attr, | |
2209 | .flags = 0, | |
2210 | }; | |
2211 | ||
2212 | return kvm_device_ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute) ? 0 : 1; | |
2213 | } | |
2214 | ||
556969e9 EA |
2215 | int kvm_device_access(int fd, int group, uint64_t attr, |
2216 | void *val, bool write, Error **errp) | |
4b3cfe72 PF |
2217 | { |
2218 | struct kvm_device_attr kvmattr; | |
2219 | int err; | |
2220 | ||
2221 | kvmattr.flags = 0; | |
2222 | kvmattr.group = group; | |
2223 | kvmattr.attr = attr; | |
2224 | kvmattr.addr = (uintptr_t)val; | |
2225 | ||
2226 | err = kvm_device_ioctl(fd, | |
2227 | write ? KVM_SET_DEVICE_ATTR : KVM_GET_DEVICE_ATTR, | |
2228 | &kvmattr); | |
2229 | if (err < 0) { | |
556969e9 EA |
2230 | error_setg_errno(errp, -err, |
2231 | "KVM_%s_DEVICE_ATTR failed: Group %d " | |
2232 | "attr 0x%016" PRIx64, | |
2233 | write ? "SET" : "GET", group, attr); | |
4b3cfe72 | 2234 | } |
556969e9 | 2235 | return err; |
4b3cfe72 PF |
2236 | } |
2237 | ||
62dd4eda | 2238 | bool kvm_has_sync_mmu(void) |
bd322087 | 2239 | { |
62dd4eda | 2240 | return kvm_state->sync_mmu; |
bd322087 | 2241 | } |
e22a25c9 | 2242 | |
a0fb002c JK |
2243 | int kvm_has_vcpu_events(void) |
2244 | { | |
2245 | return kvm_state->vcpu_events; | |
2246 | } | |
2247 | ||
b0b1d690 JK |
2248 | int kvm_has_robust_singlestep(void) |
2249 | { | |
2250 | return kvm_state->robust_singlestep; | |
2251 | } | |
2252 | ||
ff44f1a3 JK |
2253 | int kvm_has_debugregs(void) |
2254 | { | |
2255 | return kvm_state->debugregs; | |
2256 | } | |
2257 | ||
ebbfef2f LA |
2258 | int kvm_max_nested_state_length(void) |
2259 | { | |
2260 | return kvm_state->max_nested_state_len; | |
2261 | } | |
2262 | ||
d2f2b8a7 SH |
2263 | int kvm_has_many_ioeventfds(void) |
2264 | { | |
2265 | if (!kvm_enabled()) { | |
2266 | return 0; | |
2267 | } | |
2268 | return kvm_state->many_ioeventfds; | |
2269 | } | |
2270 | ||
84b058d7 JK |
2271 | int kvm_has_gsi_routing(void) |
2272 | { | |
a9c5eb0d | 2273 | #ifdef KVM_CAP_IRQ_ROUTING |
84b058d7 | 2274 | return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING); |
a9c5eb0d AG |
2275 | #else |
2276 | return false; | |
2277 | #endif | |
84b058d7 JK |
2278 | } |
2279 | ||
3ab73842 JK |
2280 | int kvm_has_intx_set_mask(void) |
2281 | { | |
2282 | return kvm_state->intx_set_mask; | |
2283 | } | |
2284 | ||
5d721b78 AG |
2285 | bool kvm_arm_supports_user_irq(void) |
2286 | { | |
2287 | return kvm_check_extension(kvm_state, KVM_CAP_ARM_USER_IRQ); | |
2288 | } | |
2289 | ||
e22a25c9 | 2290 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
a60f24b5 | 2291 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu, |
e22a25c9 AL |
2292 | target_ulong pc) |
2293 | { | |
2294 | struct kvm_sw_breakpoint *bp; | |
2295 | ||
a60f24b5 | 2296 | QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) { |
a426e122 | 2297 | if (bp->pc == pc) { |
e22a25c9 | 2298 | return bp; |
a426e122 | 2299 | } |
e22a25c9 AL |
2300 | } |
2301 | return NULL; | |
2302 | } | |
2303 | ||
a60f24b5 | 2304 | int kvm_sw_breakpoints_active(CPUState *cpu) |
e22a25c9 | 2305 | { |
a60f24b5 | 2306 | return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints); |
e22a25c9 AL |
2307 | } |
2308 | ||
452e4751 GC |
2309 | struct kvm_set_guest_debug_data { |
2310 | struct kvm_guest_debug dbg; | |
452e4751 GC |
2311 | int err; |
2312 | }; | |
2313 | ||
14e6fe12 | 2314 | static void kvm_invoke_set_guest_debug(CPUState *cpu, run_on_cpu_data data) |
452e4751 | 2315 | { |
14e6fe12 PB |
2316 | struct kvm_set_guest_debug_data *dbg_data = |
2317 | (struct kvm_set_guest_debug_data *) data.host_ptr; | |
b3807725 | 2318 | |
3c0ed2a3 | 2319 | dbg_data->err = kvm_vcpu_ioctl(cpu, KVM_SET_GUEST_DEBUG, |
a60f24b5 | 2320 | &dbg_data->dbg); |
452e4751 GC |
2321 | } |
2322 | ||
38e478ec | 2323 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 | 2324 | { |
452e4751 | 2325 | struct kvm_set_guest_debug_data data; |
e22a25c9 | 2326 | |
b0b1d690 | 2327 | data.dbg.control = reinject_trap; |
e22a25c9 | 2328 | |
ed2803da | 2329 | if (cpu->singlestep_enabled) { |
b0b1d690 JK |
2330 | data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
2331 | } | |
20d695a9 | 2332 | kvm_arch_update_guest_debug(cpu, &data.dbg); |
e22a25c9 | 2333 | |
14e6fe12 PB |
2334 | run_on_cpu(cpu, kvm_invoke_set_guest_debug, |
2335 | RUN_ON_CPU_HOST_PTR(&data)); | |
452e4751 | 2336 | return data.err; |
e22a25c9 AL |
2337 | } |
2338 | ||
62278814 | 2339 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2340 | target_ulong len, int type) |
2341 | { | |
2342 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
2343 | int err; |
2344 | ||
2345 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 2346 | bp = kvm_find_sw_breakpoint(cpu, addr); |
e22a25c9 AL |
2347 | if (bp) { |
2348 | bp->use_count++; | |
2349 | return 0; | |
2350 | } | |
2351 | ||
7267c094 | 2352 | bp = g_malloc(sizeof(struct kvm_sw_breakpoint)); |
e22a25c9 AL |
2353 | bp->pc = addr; |
2354 | bp->use_count = 1; | |
80b7cd73 | 2355 | err = kvm_arch_insert_sw_breakpoint(cpu, bp); |
e22a25c9 | 2356 | if (err) { |
7267c094 | 2357 | g_free(bp); |
e22a25c9 AL |
2358 | return err; |
2359 | } | |
2360 | ||
80b7cd73 | 2361 | QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
e22a25c9 AL |
2362 | } else { |
2363 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); | |
a426e122 | 2364 | if (err) { |
e22a25c9 | 2365 | return err; |
a426e122 | 2366 | } |
e22a25c9 AL |
2367 | } |
2368 | ||
bdc44640 | 2369 | CPU_FOREACH(cpu) { |
38e478ec | 2370 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 2371 | if (err) { |
e22a25c9 | 2372 | return err; |
a426e122 | 2373 | } |
e22a25c9 AL |
2374 | } |
2375 | return 0; | |
2376 | } | |
2377 | ||
62278814 | 2378 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2379 | target_ulong len, int type) |
2380 | { | |
2381 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
2382 | int err; |
2383 | ||
2384 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 2385 | bp = kvm_find_sw_breakpoint(cpu, addr); |
a426e122 | 2386 | if (!bp) { |
e22a25c9 | 2387 | return -ENOENT; |
a426e122 | 2388 | } |
e22a25c9 AL |
2389 | |
2390 | if (bp->use_count > 1) { | |
2391 | bp->use_count--; | |
2392 | return 0; | |
2393 | } | |
2394 | ||
80b7cd73 | 2395 | err = kvm_arch_remove_sw_breakpoint(cpu, bp); |
a426e122 | 2396 | if (err) { |
e22a25c9 | 2397 | return err; |
a426e122 | 2398 | } |
e22a25c9 | 2399 | |
80b7cd73 | 2400 | QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
7267c094 | 2401 | g_free(bp); |
e22a25c9 AL |
2402 | } else { |
2403 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); | |
a426e122 | 2404 | if (err) { |
e22a25c9 | 2405 | return err; |
a426e122 | 2406 | } |
e22a25c9 AL |
2407 | } |
2408 | ||
bdc44640 | 2409 | CPU_FOREACH(cpu) { |
38e478ec | 2410 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 2411 | if (err) { |
e22a25c9 | 2412 | return err; |
a426e122 | 2413 | } |
e22a25c9 AL |
2414 | } |
2415 | return 0; | |
2416 | } | |
2417 | ||
1d5791f4 | 2418 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
2419 | { |
2420 | struct kvm_sw_breakpoint *bp, *next; | |
80b7cd73 | 2421 | KVMState *s = cpu->kvm_state; |
dc54e252 | 2422 | CPUState *tmpcpu; |
e22a25c9 | 2423 | |
72cf2d4f | 2424 | QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
80b7cd73 | 2425 | if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) { |
e22a25c9 | 2426 | /* Try harder to find a CPU that currently sees the breakpoint. */ |
dc54e252 CG |
2427 | CPU_FOREACH(tmpcpu) { |
2428 | if (kvm_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) { | |
e22a25c9 | 2429 | break; |
a426e122 | 2430 | } |
e22a25c9 AL |
2431 | } |
2432 | } | |
78021d6d JK |
2433 | QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry); |
2434 | g_free(bp); | |
e22a25c9 AL |
2435 | } |
2436 | kvm_arch_remove_all_hw_breakpoints(); | |
2437 | ||
bdc44640 | 2438 | CPU_FOREACH(cpu) { |
38e478ec | 2439 | kvm_update_guest_debug(cpu, 0); |
a426e122 | 2440 | } |
e22a25c9 AL |
2441 | } |
2442 | ||
2443 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ | |
2444 | ||
38e478ec | 2445 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 AL |
2446 | { |
2447 | return -EINVAL; | |
2448 | } | |
2449 | ||
62278814 | 2450 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2451 | target_ulong len, int type) |
2452 | { | |
2453 | return -EINVAL; | |
2454 | } | |
2455 | ||
62278814 | 2456 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2457 | target_ulong len, int type) |
2458 | { | |
2459 | return -EINVAL; | |
2460 | } | |
2461 | ||
1d5791f4 | 2462 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
2463 | { |
2464 | } | |
2465 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ | |
cc84de95 | 2466 | |
18268b60 | 2467 | static int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset) |
cc84de95 | 2468 | { |
aed6efb9 | 2469 | KVMState *s = kvm_state; |
cc84de95 MT |
2470 | struct kvm_signal_mask *sigmask; |
2471 | int r; | |
2472 | ||
7267c094 | 2473 | sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset)); |
cc84de95 | 2474 | |
aed6efb9 | 2475 | sigmask->len = s->sigmask_len; |
cc84de95 | 2476 | memcpy(sigmask->sigset, sigset, sizeof(*sigset)); |
1bc22652 | 2477 | r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask); |
7267c094 | 2478 | g_free(sigmask); |
cc84de95 MT |
2479 | |
2480 | return r; | |
2481 | } | |
4d39892c | 2482 | |
cf0f7cf9 | 2483 | static void kvm_ipi_signal(int sig) |
18268b60 | 2484 | { |
cf0f7cf9 PB |
2485 | if (current_cpu) { |
2486 | assert(kvm_immediate_exit); | |
2487 | kvm_cpu_kick(current_cpu); | |
2488 | } | |
18268b60 PB |
2489 | } |
2490 | ||
2491 | void kvm_init_cpu_signals(CPUState *cpu) | |
2492 | { | |
2493 | int r; | |
2494 | sigset_t set; | |
2495 | struct sigaction sigact; | |
2496 | ||
2497 | memset(&sigact, 0, sizeof(sigact)); | |
cf0f7cf9 | 2498 | sigact.sa_handler = kvm_ipi_signal; |
18268b60 PB |
2499 | sigaction(SIG_IPI, &sigact, NULL); |
2500 | ||
2501 | pthread_sigmask(SIG_BLOCK, NULL, &set); | |
2502 | #if defined KVM_HAVE_MCE_INJECTION | |
2503 | sigdelset(&set, SIGBUS); | |
2504 | pthread_sigmask(SIG_SETMASK, &set, NULL); | |
2505 | #endif | |
2506 | sigdelset(&set, SIG_IPI); | |
cf0f7cf9 PB |
2507 | if (kvm_immediate_exit) { |
2508 | r = pthread_sigmask(SIG_SETMASK, &set, NULL); | |
2509 | } else { | |
2510 | r = kvm_set_signal_mask(cpu, &set); | |
2511 | } | |
18268b60 PB |
2512 | if (r) { |
2513 | fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r)); | |
2514 | exit(1); | |
2515 | } | |
2516 | } | |
2517 | ||
2ae41db2 | 2518 | /* Called asynchronously in VCPU thread. */ |
290adf38 | 2519 | int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) |
a1b87fe0 | 2520 | { |
2ae41db2 PB |
2521 | #ifdef KVM_HAVE_MCE_INJECTION |
2522 | if (have_sigbus_pending) { | |
2523 | return 1; | |
2524 | } | |
2525 | have_sigbus_pending = true; | |
2526 | pending_sigbus_addr = addr; | |
2527 | pending_sigbus_code = code; | |
2528 | atomic_set(&cpu->exit_request, 1); | |
2529 | return 0; | |
2530 | #else | |
2531 | return 1; | |
2532 | #endif | |
a1b87fe0 JK |
2533 | } |
2534 | ||
2ae41db2 | 2535 | /* Called synchronously (via signalfd) in main thread. */ |
a1b87fe0 JK |
2536 | int kvm_on_sigbus(int code, void *addr) |
2537 | { | |
2ae41db2 | 2538 | #ifdef KVM_HAVE_MCE_INJECTION |
4d39892c PB |
2539 | /* Action required MCE kills the process if SIGBUS is blocked. Because |
2540 | * that's what happens in the I/O thread, where we handle MCE via signalfd, | |
2541 | * we can only get action optional here. | |
2542 | */ | |
2543 | assert(code != BUS_MCEERR_AR); | |
2544 | kvm_arch_on_sigbus_vcpu(first_cpu, code, addr); | |
2545 | return 0; | |
2ae41db2 PB |
2546 | #else |
2547 | return 1; | |
2548 | #endif | |
a1b87fe0 | 2549 | } |
0a6a7cca CD |
2550 | |
2551 | int kvm_create_device(KVMState *s, uint64_t type, bool test) | |
2552 | { | |
2553 | int ret; | |
2554 | struct kvm_create_device create_dev; | |
2555 | ||
2556 | create_dev.type = type; | |
2557 | create_dev.fd = -1; | |
2558 | create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0; | |
2559 | ||
2560 | if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) { | |
2561 | return -ENOTSUP; | |
2562 | } | |
2563 | ||
2564 | ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev); | |
2565 | if (ret) { | |
2566 | return ret; | |
2567 | } | |
2568 | ||
2569 | return test ? 0 : create_dev.fd; | |
2570 | } | |
ada4135f | 2571 | |
29039acf PX |
2572 | bool kvm_device_supported(int vmfd, uint64_t type) |
2573 | { | |
2574 | struct kvm_create_device create_dev = { | |
2575 | .type = type, | |
2576 | .fd = -1, | |
2577 | .flags = KVM_CREATE_DEVICE_TEST, | |
2578 | }; | |
2579 | ||
2580 | if (ioctl(vmfd, KVM_CHECK_EXTENSION, KVM_CAP_DEVICE_CTRL) <= 0) { | |
2581 | return false; | |
2582 | } | |
2583 | ||
2584 | return (ioctl(vmfd, KVM_CREATE_DEVICE, &create_dev) >= 0); | |
2585 | } | |
2586 | ||
ada4135f CH |
2587 | int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source) |
2588 | { | |
2589 | struct kvm_one_reg reg; | |
2590 | int r; | |
2591 | ||
2592 | reg.id = id; | |
2593 | reg.addr = (uintptr_t) source; | |
2594 | r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); | |
2595 | if (r) { | |
844a3d34 | 2596 | trace_kvm_failed_reg_set(id, strerror(-r)); |
ada4135f CH |
2597 | } |
2598 | return r; | |
2599 | } | |
2600 | ||
2601 | int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target) | |
2602 | { | |
2603 | struct kvm_one_reg reg; | |
2604 | int r; | |
2605 | ||
2606 | reg.id = id; | |
2607 | reg.addr = (uintptr_t) target; | |
2608 | r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); | |
2609 | if (r) { | |
844a3d34 | 2610 | trace_kvm_failed_reg_get(id, strerror(-r)); |
ada4135f CH |
2611 | } |
2612 | return r; | |
2613 | } | |
782c3f29 EH |
2614 | |
2615 | static void kvm_accel_class_init(ObjectClass *oc, void *data) | |
2616 | { | |
2617 | AccelClass *ac = ACCEL_CLASS(oc); | |
2618 | ac->name = "KVM"; | |
0d15da8e | 2619 | ac->init_machine = kvm_init; |
782c3f29 EH |
2620 | ac->allowed = &kvm_allowed; |
2621 | } | |
2622 | ||
2623 | static const TypeInfo kvm_accel_type = { | |
2624 | .name = TYPE_KVM_ACCEL, | |
2625 | .parent = TYPE_ACCEL, | |
2626 | .class_init = kvm_accel_class_init, | |
fc02086b | 2627 | .instance_size = sizeof(KVMState), |
782c3f29 EH |
2628 | }; |
2629 | ||
2630 | static void kvm_type_init(void) | |
2631 | { | |
2632 | type_register_static(&kvm_accel_type); | |
2633 | } | |
2634 | ||
2635 | type_init(kvm_type_init); |