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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" |
a2cb15b0 | 26 | #include "hw/pci/msi.h" |
d1f6af6a | 27 | #include "hw/pci/msix.h" |
d426d9fb | 28 | #include "hw/s390x/adapter.h" |
022c62cb | 29 | #include "exec/gdbstub.h" |
8571ed35 | 30 | #include "sysemu/kvm_int.h" |
54d31236 | 31 | #include "sysemu/runstate.h" |
d2528bdc | 32 | #include "sysemu/cpus.h" |
46517dd4 | 33 | #include "sysemu/sysemu.h" |
1de7afc9 | 34 | #include "qemu/bswap.h" |
022c62cb | 35 | #include "exec/memory.h" |
747afd5b | 36 | #include "exec/ram_addr.h" |
022c62cb | 37 | #include "exec/address-spaces.h" |
1de7afc9 | 38 | #include "qemu/event_notifier.h" |
db725815 | 39 | #include "qemu/main-loop.h" |
92229a57 | 40 | #include "trace.h" |
197e3524 | 41 | #include "hw/irq.h" |
b20e3780 | 42 | #include "sysemu/sev.h" |
23b0898e | 43 | #include "qapi/visitor.h" |
11bc4a13 PB |
44 | #include "qapi/qapi-types-common.h" |
45 | #include "qapi/qapi-visit-common.h" | |
6b552b9b | 46 | #include "sysemu/reset.h" |
05330448 | 47 | |
135a129a AK |
48 | #include "hw/boards.h" |
49 | ||
d2f2b8a7 SH |
50 | /* This check must be after config-host.h is included */ |
51 | #ifdef CONFIG_EVENTFD | |
52 | #include <sys/eventfd.h> | |
53 | #endif | |
54 | ||
bc92e4e9 AJ |
55 | /* KVM uses PAGE_SIZE in its definition of KVM_COALESCED_MMIO_MAX. We |
56 | * need to use the real host PAGE_SIZE, as that's what KVM will use. | |
57 | */ | |
038adc2f | 58 | #define PAGE_SIZE qemu_real_host_page_size |
f65ed4c1 | 59 | |
05330448 AL |
60 | //#define DEBUG_KVM |
61 | ||
62 | #ifdef DEBUG_KVM | |
8c0d577e | 63 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
64 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
65 | #else | |
8c0d577e | 66 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
67 | do { } while (0) |
68 | #endif | |
69 | ||
04fa27f5 JK |
70 | #define KVM_MSI_HASHTAB_SIZE 256 |
71 | ||
4c055ab5 GZ |
72 | struct KVMParkedVcpu { |
73 | unsigned long vcpu_id; | |
74 | int kvm_fd; | |
75 | QLIST_ENTRY(KVMParkedVcpu) node; | |
76 | }; | |
77 | ||
9d1c35df | 78 | struct KVMState |
05330448 | 79 | { |
fc02086b EH |
80 | AccelState parent_obj; |
81 | ||
fb541ca5 | 82 | int nr_slots; |
05330448 AL |
83 | int fd; |
84 | int vmfd; | |
f65ed4c1 | 85 | int coalesced_mmio; |
e6d34aee | 86 | int coalesced_pio; |
62a2744c | 87 | struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; |
1cae88b9 | 88 | bool coalesced_flush_in_progress; |
a0fb002c | 89 | int vcpu_events; |
b0b1d690 | 90 | int robust_singlestep; |
ff44f1a3 | 91 | int debugregs; |
e22a25c9 | 92 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
b58deb34 | 93 | QTAILQ_HEAD(, kvm_sw_breakpoint) kvm_sw_breakpoints; |
e22a25c9 | 94 | #endif |
ebbfef2f | 95 | int max_nested_state_len; |
d2f2b8a7 | 96 | int many_ioeventfds; |
3ab73842 | 97 | int intx_set_mask; |
23b0898e | 98 | int kvm_shadow_mem; |
11bc4a13 PB |
99 | bool kernel_irqchip_allowed; |
100 | bool kernel_irqchip_required; | |
d1972be1 | 101 | OnOffAuto kernel_irqchip_split; |
62dd4eda | 102 | bool sync_mmu; |
494cd11d | 103 | uint64_t manual_dirty_log_protect; |
92e4b519 DG |
104 | /* The man page (and posix) say ioctl numbers are signed int, but |
105 | * they're not. Linux, glibc and *BSD all treat ioctl numbers as | |
106 | * unsigned, and treating them as signed here can break things */ | |
e333cd69 | 107 | unsigned irq_set_ioctl; |
aed6efb9 | 108 | unsigned int sigmask_len; |
197e3524 | 109 | GHashTable *gsimap; |
84b058d7 JK |
110 | #ifdef KVM_CAP_IRQ_ROUTING |
111 | struct kvm_irq_routing *irq_routes; | |
112 | int nr_allocated_irq_routes; | |
8269fb70 | 113 | unsigned long *used_gsi_bitmap; |
4e2e4e63 | 114 | unsigned int gsi_count; |
b58deb34 | 115 | QTAILQ_HEAD(, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE]; |
84b058d7 | 116 | #endif |
7bbda04c | 117 | KVMMemoryListener memory_listener; |
4c055ab5 | 118 | QLIST_HEAD(, KVMParkedVcpu) kvm_parked_vcpus; |
b20e3780 BS |
119 | |
120 | /* memory encryption */ | |
121 | void *memcrypt_handle; | |
54e89539 | 122 | int (*memcrypt_encrypt_data)(void *handle, uint8_t *ptr, uint64_t len); |
8072aae3 AK |
123 | |
124 | /* For "info mtree -f" to tell if an MR is registered in KVM */ | |
125 | int nr_as; | |
126 | struct KVMAs { | |
127 | KVMMemoryListener *ml; | |
128 | AddressSpace *as; | |
129 | } *as; | |
9d1c35df | 130 | }; |
05330448 | 131 | |
6a7af8cb | 132 | KVMState *kvm_state; |
3d4b2649 | 133 | bool kvm_kernel_irqchip; |
15eafc2e | 134 | bool kvm_split_irqchip; |
7ae26bd4 | 135 | bool kvm_async_interrupts_allowed; |
215e79c0 | 136 | bool kvm_halt_in_kernel_allowed; |
69e03ae6 | 137 | bool kvm_eventfds_allowed; |
cc7e0ddf | 138 | bool kvm_irqfds_allowed; |
f41389ae | 139 | bool kvm_resamplefds_allowed; |
614e41bc | 140 | bool kvm_msi_via_irqfd_allowed; |
f3e1bed8 | 141 | bool kvm_gsi_routing_allowed; |
76fe21de | 142 | bool kvm_gsi_direct_mapping; |
13eed94e | 143 | bool kvm_allowed; |
df9c8b75 | 144 | bool kvm_readonly_mem_allowed; |
d0a073a1 | 145 | bool kvm_vm_attributes_allowed; |
50bf31b9 | 146 | bool kvm_direct_msi_allowed; |
35108223 | 147 | bool kvm_ioeventfd_any_length_allowed; |
767a554a | 148 | bool kvm_msi_use_devid; |
cf0f7cf9 | 149 | static bool kvm_immediate_exit; |
023ae9a8 | 150 | static hwaddr kvm_max_slot_size = ~0; |
05330448 | 151 | |
94a8d39a JK |
152 | static const KVMCapabilityInfo kvm_required_capabilites[] = { |
153 | KVM_CAP_INFO(USER_MEMORY), | |
154 | KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS), | |
89de4b91 | 155 | KVM_CAP_INFO(JOIN_MEMORY_REGIONS_WORKS), |
94a8d39a JK |
156 | KVM_CAP_LAST_INFO |
157 | }; | |
158 | ||
3607715a DG |
159 | static NotifierList kvm_irqchip_change_notifiers = |
160 | NOTIFIER_LIST_INITIALIZER(kvm_irqchip_change_notifiers); | |
161 | ||
c82d9d43 PX |
162 | struct KVMResampleFd { |
163 | int gsi; | |
164 | EventNotifier *resample_event; | |
165 | QLIST_ENTRY(KVMResampleFd) node; | |
166 | }; | |
167 | typedef struct KVMResampleFd KVMResampleFd; | |
168 | ||
169 | /* | |
170 | * Only used with split irqchip where we need to do the resample fd | |
171 | * kick for the kernel from userspace. | |
172 | */ | |
173 | static QLIST_HEAD(, KVMResampleFd) kvm_resample_fd_list = | |
174 | QLIST_HEAD_INITIALIZER(kvm_resample_fd_list); | |
175 | ||
36adac49 PX |
176 | #define kvm_slots_lock(kml) qemu_mutex_lock(&(kml)->slots_lock) |
177 | #define kvm_slots_unlock(kml) qemu_mutex_unlock(&(kml)->slots_lock) | |
178 | ||
c82d9d43 PX |
179 | static inline void kvm_resample_fd_remove(int gsi) |
180 | { | |
181 | KVMResampleFd *rfd; | |
182 | ||
183 | QLIST_FOREACH(rfd, &kvm_resample_fd_list, node) { | |
184 | if (rfd->gsi == gsi) { | |
185 | QLIST_REMOVE(rfd, node); | |
186 | g_free(rfd); | |
187 | break; | |
188 | } | |
189 | } | |
190 | } | |
191 | ||
192 | static inline void kvm_resample_fd_insert(int gsi, EventNotifier *event) | |
193 | { | |
194 | KVMResampleFd *rfd = g_new0(KVMResampleFd, 1); | |
195 | ||
196 | rfd->gsi = gsi; | |
197 | rfd->resample_event = event; | |
198 | ||
199 | QLIST_INSERT_HEAD(&kvm_resample_fd_list, rfd, node); | |
200 | } | |
201 | ||
202 | void kvm_resample_fd_notify(int gsi) | |
203 | { | |
204 | KVMResampleFd *rfd; | |
205 | ||
206 | QLIST_FOREACH(rfd, &kvm_resample_fd_list, node) { | |
207 | if (rfd->gsi == gsi) { | |
208 | event_notifier_set(rfd->resample_event); | |
209 | trace_kvm_resample_fd_notify(gsi); | |
210 | return; | |
211 | } | |
212 | } | |
213 | } | |
214 | ||
44f2e6c1 BR |
215 | int kvm_get_max_memslots(void) |
216 | { | |
4f7f5893 | 217 | KVMState *s = KVM_STATE(current_accel()); |
44f2e6c1 BR |
218 | |
219 | return s->nr_slots; | |
220 | } | |
221 | ||
b20e3780 BS |
222 | bool kvm_memcrypt_enabled(void) |
223 | { | |
224 | if (kvm_state && kvm_state->memcrypt_handle) { | |
225 | return true; | |
226 | } | |
227 | ||
228 | return false; | |
229 | } | |
230 | ||
54e89539 BS |
231 | int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len) |
232 | { | |
233 | if (kvm_state->memcrypt_handle && | |
234 | kvm_state->memcrypt_encrypt_data) { | |
235 | return kvm_state->memcrypt_encrypt_data(kvm_state->memcrypt_handle, | |
236 | ptr, len); | |
237 | } | |
238 | ||
239 | return 1; | |
240 | } | |
241 | ||
36adac49 | 242 | /* Called with KVMMemoryListener.slots_lock held */ |
7bbda04c | 243 | static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml) |
05330448 | 244 | { |
7bbda04c | 245 | KVMState *s = kvm_state; |
05330448 AL |
246 | int i; |
247 | ||
fb541ca5 | 248 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c PB |
249 | if (kml->slots[i].memory_size == 0) { |
250 | return &kml->slots[i]; | |
a426e122 | 251 | } |
05330448 AL |
252 | } |
253 | ||
b8865591 IM |
254 | return NULL; |
255 | } | |
256 | ||
257 | bool kvm_has_free_slot(MachineState *ms) | |
258 | { | |
7bbda04c | 259 | KVMState *s = KVM_STATE(ms->accelerator); |
36adac49 PX |
260 | bool result; |
261 | KVMMemoryListener *kml = &s->memory_listener; | |
262 | ||
263 | kvm_slots_lock(kml); | |
264 | result = !!kvm_get_free_slot(kml); | |
265 | kvm_slots_unlock(kml); | |
7bbda04c | 266 | |
36adac49 | 267 | return result; |
b8865591 IM |
268 | } |
269 | ||
36adac49 | 270 | /* Called with KVMMemoryListener.slots_lock held */ |
7bbda04c | 271 | static KVMSlot *kvm_alloc_slot(KVMMemoryListener *kml) |
b8865591 | 272 | { |
7bbda04c | 273 | KVMSlot *slot = kvm_get_free_slot(kml); |
b8865591 IM |
274 | |
275 | if (slot) { | |
276 | return slot; | |
277 | } | |
278 | ||
d3f8d37f AL |
279 | fprintf(stderr, "%s: no free slot available\n", __func__); |
280 | abort(); | |
281 | } | |
282 | ||
7bbda04c | 283 | static KVMSlot *kvm_lookup_matching_slot(KVMMemoryListener *kml, |
a8170e5e | 284 | hwaddr start_addr, |
2747e716 | 285 | hwaddr size) |
d3f8d37f | 286 | { |
7bbda04c | 287 | KVMState *s = kvm_state; |
d3f8d37f AL |
288 | int i; |
289 | ||
fb541ca5 | 290 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c | 291 | KVMSlot *mem = &kml->slots[i]; |
d3f8d37f | 292 | |
2747e716 | 293 | if (start_addr == mem->start_addr && size == mem->memory_size) { |
d3f8d37f AL |
294 | return mem; |
295 | } | |
296 | } | |
297 | ||
05330448 AL |
298 | return NULL; |
299 | } | |
300 | ||
5ea69c2e DH |
301 | /* |
302 | * Calculate and align the start address and the size of the section. | |
303 | * Return the size. If the size is 0, the aligned section is empty. | |
304 | */ | |
305 | static hwaddr kvm_align_section(MemoryRegionSection *section, | |
306 | hwaddr *start) | |
307 | { | |
308 | hwaddr size = int128_get64(section->size); | |
a6ffc423 | 309 | hwaddr delta, aligned; |
5ea69c2e DH |
310 | |
311 | /* kvm works in page size chunks, but the function may be called | |
312 | with sub-page size and unaligned start address. Pad the start | |
313 | address to next and truncate size to previous page boundary. */ | |
a6ffc423 DH |
314 | aligned = ROUND_UP(section->offset_within_address_space, |
315 | qemu_real_host_page_size); | |
316 | delta = aligned - section->offset_within_address_space; | |
317 | *start = aligned; | |
5ea69c2e DH |
318 | if (delta > size) { |
319 | return 0; | |
320 | } | |
5ea69c2e | 321 | |
a6ffc423 | 322 | return (size - delta) & qemu_real_host_page_mask; |
5ea69c2e DH |
323 | } |
324 | ||
9f213ed9 | 325 | int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, |
a8170e5e | 326 | hwaddr *phys_addr) |
983dfc3b | 327 | { |
7bbda04c | 328 | KVMMemoryListener *kml = &s->memory_listener; |
36adac49 | 329 | int i, ret = 0; |
983dfc3b | 330 | |
36adac49 | 331 | kvm_slots_lock(kml); |
fb541ca5 | 332 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c | 333 | KVMSlot *mem = &kml->slots[i]; |
983dfc3b | 334 | |
9f213ed9 AK |
335 | if (ram >= mem->ram && ram < mem->ram + mem->memory_size) { |
336 | *phys_addr = mem->start_addr + (ram - mem->ram); | |
36adac49 PX |
337 | ret = 1; |
338 | break; | |
983dfc3b HY |
339 | } |
340 | } | |
36adac49 | 341 | kvm_slots_unlock(kml); |
983dfc3b | 342 | |
36adac49 | 343 | return ret; |
983dfc3b HY |
344 | } |
345 | ||
6c090d4a | 346 | static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot, bool new) |
5832d1f2 | 347 | { |
7bbda04c | 348 | KVMState *s = kvm_state; |
5832d1f2 | 349 | struct kvm_userspace_memory_region mem; |
fe29141b | 350 | int ret; |
5832d1f2 | 351 | |
38bfe691 | 352 | mem.slot = slot->slot | (kml->as_id << 16); |
5832d1f2 | 353 | mem.guest_phys_addr = slot->start_addr; |
9f213ed9 | 354 | mem.userspace_addr = (unsigned long)slot->ram; |
5832d1f2 | 355 | mem.flags = slot->flags; |
651eb0f4 | 356 | |
6c090d4a | 357 | if (slot->memory_size && !new && (mem.flags ^ slot->old_flags) & KVM_MEM_READONLY) { |
235e8982 JJ |
358 | /* Set the slot size to 0 before setting the slot to the desired |
359 | * value. This is needed based on KVM commit 75d61fbc. */ | |
360 | mem.memory_size = 0; | |
88cd34ee PMD |
361 | ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); |
362 | if (ret < 0) { | |
363 | goto err; | |
364 | } | |
235e8982 JJ |
365 | } |
366 | mem.memory_size = slot->memory_size; | |
fe29141b | 367 | ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); |
6c090d4a | 368 | slot->old_flags = mem.flags; |
88cd34ee | 369 | err: |
fe29141b AK |
370 | trace_kvm_set_user_memory(mem.slot, mem.flags, mem.guest_phys_addr, |
371 | mem.memory_size, mem.userspace_addr, ret); | |
88cd34ee PMD |
372 | if (ret < 0) { |
373 | error_report("%s: KVM_SET_USER_MEMORY_REGION failed, slot=%d," | |
374 | " start=0x%" PRIx64 ", size=0x%" PRIx64 ": %s", | |
375 | __func__, mem.slot, slot->start_addr, | |
376 | (uint64_t)mem.memory_size, strerror(errno)); | |
377 | } | |
fe29141b | 378 | return ret; |
5832d1f2 AL |
379 | } |
380 | ||
4c055ab5 GZ |
381 | int kvm_destroy_vcpu(CPUState *cpu) |
382 | { | |
383 | KVMState *s = kvm_state; | |
384 | long mmap_size; | |
385 | struct KVMParkedVcpu *vcpu = NULL; | |
386 | int ret = 0; | |
387 | ||
388 | DPRINTF("kvm_destroy_vcpu\n"); | |
389 | ||
b1115c99 LA |
390 | ret = kvm_arch_destroy_vcpu(cpu); |
391 | if (ret < 0) { | |
392 | goto err; | |
393 | } | |
394 | ||
4c055ab5 GZ |
395 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); |
396 | if (mmap_size < 0) { | |
397 | ret = mmap_size; | |
398 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); | |
399 | goto err; | |
400 | } | |
401 | ||
402 | ret = munmap(cpu->kvm_run, mmap_size); | |
403 | if (ret < 0) { | |
404 | goto err; | |
405 | } | |
406 | ||
407 | vcpu = g_malloc0(sizeof(*vcpu)); | |
408 | vcpu->vcpu_id = kvm_arch_vcpu_id(cpu); | |
409 | vcpu->kvm_fd = cpu->kvm_fd; | |
410 | QLIST_INSERT_HEAD(&kvm_state->kvm_parked_vcpus, vcpu, node); | |
411 | err: | |
412 | return ret; | |
413 | } | |
414 | ||
415 | static int kvm_get_vcpu(KVMState *s, unsigned long vcpu_id) | |
416 | { | |
417 | struct KVMParkedVcpu *cpu; | |
418 | ||
419 | QLIST_FOREACH(cpu, &s->kvm_parked_vcpus, node) { | |
420 | if (cpu->vcpu_id == vcpu_id) { | |
421 | int kvm_fd; | |
422 | ||
423 | QLIST_REMOVE(cpu, node); | |
424 | kvm_fd = cpu->kvm_fd; | |
425 | g_free(cpu); | |
426 | return kvm_fd; | |
427 | } | |
428 | } | |
429 | ||
430 | return kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)vcpu_id); | |
431 | } | |
432 | ||
504134d2 | 433 | int kvm_init_vcpu(CPUState *cpu) |
05330448 AL |
434 | { |
435 | KVMState *s = kvm_state; | |
436 | long mmap_size; | |
437 | int ret; | |
438 | ||
8c0d577e | 439 | DPRINTF("kvm_init_vcpu\n"); |
05330448 | 440 | |
4c055ab5 | 441 | ret = kvm_get_vcpu(s, kvm_arch_vcpu_id(cpu)); |
05330448 | 442 | if (ret < 0) { |
8c0d577e | 443 | DPRINTF("kvm_create_vcpu failed\n"); |
05330448 AL |
444 | goto err; |
445 | } | |
446 | ||
8737c51c | 447 | cpu->kvm_fd = ret; |
a60f24b5 | 448 | cpu->kvm_state = s; |
99f31832 | 449 | cpu->vcpu_dirty = true; |
05330448 AL |
450 | |
451 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
452 | if (mmap_size < 0) { | |
748a680b | 453 | ret = mmap_size; |
8c0d577e | 454 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); |
05330448 AL |
455 | goto err; |
456 | } | |
457 | ||
f7575c96 | 458 | cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, |
8737c51c | 459 | cpu->kvm_fd, 0); |
f7575c96 | 460 | if (cpu->kvm_run == MAP_FAILED) { |
05330448 | 461 | ret = -errno; |
8c0d577e | 462 | DPRINTF("mmap'ing vcpu state failed\n"); |
05330448 AL |
463 | goto err; |
464 | } | |
465 | ||
a426e122 JK |
466 | if (s->coalesced_mmio && !s->coalesced_mmio_ring) { |
467 | s->coalesced_mmio_ring = | |
f7575c96 | 468 | (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE; |
a426e122 | 469 | } |
62a2744c | 470 | |
20d695a9 | 471 | ret = kvm_arch_init_vcpu(cpu); |
05330448 AL |
472 | err: |
473 | return ret; | |
474 | } | |
475 | ||
5832d1f2 AL |
476 | /* |
477 | * dirty pages logging control | |
478 | */ | |
25254bbc | 479 | |
d6ff5cbc | 480 | static int kvm_mem_flags(MemoryRegion *mr) |
25254bbc | 481 | { |
d6ff5cbc | 482 | bool readonly = mr->readonly || memory_region_is_romd(mr); |
235e8982 | 483 | int flags = 0; |
d6ff5cbc AJ |
484 | |
485 | if (memory_region_get_dirty_log_mask(mr) != 0) { | |
486 | flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
487 | } | |
235e8982 JJ |
488 | if (readonly && kvm_readonly_mem_allowed) { |
489 | flags |= KVM_MEM_READONLY; | |
490 | } | |
491 | return flags; | |
25254bbc MT |
492 | } |
493 | ||
36adac49 | 494 | /* Called with KVMMemoryListener.slots_lock held */ |
7bbda04c PB |
495 | static int kvm_slot_update_flags(KVMMemoryListener *kml, KVMSlot *mem, |
496 | MemoryRegion *mr) | |
5832d1f2 | 497 | { |
d6ff5cbc | 498 | mem->flags = kvm_mem_flags(mr); |
5832d1f2 | 499 | |
4495d6a7 | 500 | /* If nothing changed effectively, no need to issue ioctl */ |
6c090d4a | 501 | if (mem->flags == mem->old_flags) { |
25254bbc | 502 | return 0; |
4495d6a7 JK |
503 | } |
504 | ||
6c090d4a | 505 | return kvm_set_user_memory_region(kml, mem, false); |
5832d1f2 AL |
506 | } |
507 | ||
7bbda04c PB |
508 | static int kvm_section_update_flags(KVMMemoryListener *kml, |
509 | MemoryRegionSection *section) | |
25254bbc | 510 | { |
023ae9a8 | 511 | hwaddr start_addr, size, slot_size; |
343562e8 | 512 | KVMSlot *mem; |
36adac49 | 513 | int ret = 0; |
25254bbc | 514 | |
343562e8 DH |
515 | size = kvm_align_section(section, &start_addr); |
516 | if (!size) { | |
ea8cb1a8 | 517 | return 0; |
25254bbc | 518 | } |
343562e8 | 519 | |
36adac49 PX |
520 | kvm_slots_lock(kml); |
521 | ||
023ae9a8 IM |
522 | while (size && !ret) { |
523 | slot_size = MIN(kvm_max_slot_size, size); | |
524 | mem = kvm_lookup_matching_slot(kml, start_addr, slot_size); | |
525 | if (!mem) { | |
526 | /* We don't have a slot if we want to trap every access. */ | |
527 | goto out; | |
528 | } | |
343562e8 | 529 | |
023ae9a8 IM |
530 | ret = kvm_slot_update_flags(kml, mem, section->mr); |
531 | start_addr += slot_size; | |
532 | size -= slot_size; | |
533 | } | |
36adac49 PX |
534 | |
535 | out: | |
536 | kvm_slots_unlock(kml); | |
537 | return ret; | |
25254bbc MT |
538 | } |
539 | ||
a01672d3 | 540 | static void kvm_log_start(MemoryListener *listener, |
b2dfd71c PB |
541 | MemoryRegionSection *section, |
542 | int old, int new) | |
5832d1f2 | 543 | { |
7bbda04c | 544 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
545 | int r; |
546 | ||
b2dfd71c PB |
547 | if (old != 0) { |
548 | return; | |
549 | } | |
550 | ||
7bbda04c | 551 | r = kvm_section_update_flags(kml, section); |
a01672d3 AK |
552 | if (r < 0) { |
553 | abort(); | |
554 | } | |
5832d1f2 AL |
555 | } |
556 | ||
a01672d3 | 557 | static void kvm_log_stop(MemoryListener *listener, |
b2dfd71c PB |
558 | MemoryRegionSection *section, |
559 | int old, int new) | |
5832d1f2 | 560 | { |
7bbda04c | 561 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
562 | int r; |
563 | ||
b2dfd71c PB |
564 | if (new != 0) { |
565 | return; | |
566 | } | |
567 | ||
7bbda04c | 568 | r = kvm_section_update_flags(kml, section); |
a01672d3 AK |
569 | if (r < 0) { |
570 | abort(); | |
571 | } | |
5832d1f2 AL |
572 | } |
573 | ||
8369e01c | 574 | /* get kvm's dirty pages bitmap and update qemu's */ |
ffcde12f AK |
575 | static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section, |
576 | unsigned long *bitmap) | |
96c1606b | 577 | { |
8e41fb63 FZ |
578 | ram_addr_t start = section->offset_within_region + |
579 | memory_region_get_ram_addr(section->mr); | |
038adc2f | 580 | ram_addr_t pages = int128_get64(section->size) / qemu_real_host_page_size; |
5ff7fb77 JQ |
581 | |
582 | cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages); | |
8369e01c | 583 | return 0; |
96c1606b AG |
584 | } |
585 | ||
8369e01c MT |
586 | #define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) |
587 | ||
9b3a31c7 DDAG |
588 | /* Allocate the dirty bitmap for a slot */ |
589 | static void kvm_memslot_init_dirty_bitmap(KVMSlot *mem) | |
590 | { | |
591 | /* | |
592 | * XXX bad kernel interface alert | |
593 | * For dirty bitmap, kernel allocates array of size aligned to | |
594 | * bits-per-long. But for case when the kernel is 64bits and | |
595 | * the userspace is 32bits, userspace can't align to the same | |
596 | * bits-per-long, since sizeof(long) is different between kernel | |
597 | * and user space. This way, userspace will provide buffer which | |
598 | * may be 4 bytes less than the kernel will use, resulting in | |
599 | * userspace memory corruption (which is not detectable by valgrind | |
600 | * too, in most cases). | |
601 | * So for now, let's align to 64 instead of HOST_LONG_BITS here, in | |
602 | * a hope that sizeof(long) won't become >8 any time soon. | |
603 | */ | |
604 | hwaddr bitmap_size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), | |
605 | /*HOST_LONG_BITS*/ 64) / 8; | |
606 | mem->dirty_bmap = g_malloc0(bitmap_size); | |
607 | } | |
608 | ||
5832d1f2 | 609 | /** |
4a12a11a | 610 | * kvm_physical_sync_dirty_bitmap - Sync dirty bitmap from kernel space |
5832d1f2 | 611 | * |
4a12a11a PX |
612 | * This function will first try to fetch dirty bitmap from the kernel, |
613 | * and then updates qemu's dirty bitmap. | |
614 | * | |
36adac49 PX |
615 | * NOTE: caller must be with kml->slots_lock held. |
616 | * | |
4a12a11a PX |
617 | * @kml: the KVM memory listener object |
618 | * @section: the memory section to sync the dirty bitmap with | |
5832d1f2 | 619 | */ |
7bbda04c PB |
620 | static int kvm_physical_sync_dirty_bitmap(KVMMemoryListener *kml, |
621 | MemoryRegionSection *section) | |
5832d1f2 AL |
622 | { |
623 | KVMState *s = kvm_state; | |
714f78c5 | 624 | struct kvm_dirty_log d = {}; |
151f7749 | 625 | KVMSlot *mem; |
67548f09 | 626 | hwaddr start_addr, size; |
023ae9a8 | 627 | hwaddr slot_size, slot_offset = 0; |
36adac49 | 628 | int ret = 0; |
67548f09 DH |
629 | |
630 | size = kvm_align_section(section, &start_addr); | |
023ae9a8 IM |
631 | while (size) { |
632 | MemoryRegionSection subsection = *section; | |
633 | ||
634 | slot_size = MIN(kvm_max_slot_size, size); | |
635 | mem = kvm_lookup_matching_slot(kml, start_addr, slot_size); | |
67548f09 | 636 | if (!mem) { |
e377e87c | 637 | /* We don't have a slot if we want to trap every access. */ |
36adac49 | 638 | goto out; |
151f7749 | 639 | } |
5832d1f2 | 640 | |
9f4bf4ba PX |
641 | if (!mem->dirty_bmap) { |
642 | /* Allocate on the first log_sync, once and for all */ | |
9b3a31c7 | 643 | kvm_memslot_init_dirty_bitmap(mem); |
9f4bf4ba | 644 | } |
5832d1f2 | 645 | |
9f4bf4ba | 646 | d.dirty_bitmap = mem->dirty_bmap; |
38bfe691 | 647 | d.slot = mem->slot | (kml->as_id << 16); |
50212d63 | 648 | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { |
8c0d577e | 649 | DPRINTF("ioctl failed %d\n", errno); |
36adac49 PX |
650 | ret = -1; |
651 | goto out; | |
151f7749 | 652 | } |
5832d1f2 | 653 | |
023ae9a8 IM |
654 | subsection.offset_within_region += slot_offset; |
655 | subsection.size = int128_make64(slot_size); | |
656 | kvm_get_dirty_pages_log_range(&subsection, d.dirty_bitmap); | |
657 | ||
658 | slot_offset += slot_size; | |
659 | start_addr += slot_size; | |
660 | size -= slot_size; | |
5832d1f2 | 661 | } |
36adac49 PX |
662 | out: |
663 | return ret; | |
5832d1f2 AL |
664 | } |
665 | ||
ff4aa114 PX |
666 | /* Alignment requirement for KVM_CLEAR_DIRTY_LOG - 64 pages */ |
667 | #define KVM_CLEAR_LOG_SHIFT 6 | |
668 | #define KVM_CLEAR_LOG_ALIGN (qemu_real_host_page_size << KVM_CLEAR_LOG_SHIFT) | |
669 | #define KVM_CLEAR_LOG_MASK (-KVM_CLEAR_LOG_ALIGN) | |
670 | ||
4222147d PB |
671 | static int kvm_log_clear_one_slot(KVMSlot *mem, int as_id, uint64_t start, |
672 | uint64_t size) | |
ff4aa114 PX |
673 | { |
674 | KVMState *s = kvm_state; | |
4222147d | 675 | uint64_t end, bmap_start, start_delta, bmap_npages; |
ff4aa114 | 676 | struct kvm_clear_dirty_log d; |
ff4aa114 | 677 | unsigned long *bmap_clear = NULL, psize = qemu_real_host_page_size; |
4222147d | 678 | int ret; |
ff4aa114 PX |
679 | |
680 | /* | |
681 | * We need to extend either the start or the size or both to | |
682 | * satisfy the KVM interface requirement. Firstly, do the start | |
683 | * page alignment on 64 host pages | |
684 | */ | |
84516e5b PB |
685 | bmap_start = start & KVM_CLEAR_LOG_MASK; |
686 | start_delta = start - bmap_start; | |
ff4aa114 PX |
687 | bmap_start /= psize; |
688 | ||
689 | /* | |
690 | * The kernel interface has restriction on the size too, that either: | |
691 | * | |
692 | * (1) the size is 64 host pages aligned (just like the start), or | |
693 | * (2) the size fills up until the end of the KVM memslot. | |
694 | */ | |
695 | bmap_npages = DIV_ROUND_UP(size + start_delta, KVM_CLEAR_LOG_ALIGN) | |
696 | << KVM_CLEAR_LOG_SHIFT; | |
697 | end = mem->memory_size / psize; | |
698 | if (bmap_npages > end - bmap_start) { | |
699 | bmap_npages = end - bmap_start; | |
700 | } | |
701 | start_delta /= psize; | |
702 | ||
703 | /* | |
704 | * Prepare the bitmap to clear dirty bits. Here we must guarantee | |
705 | * that we won't clear any unknown dirty bits otherwise we might | |
706 | * accidentally clear some set bits which are not yet synced from | |
707 | * the kernel into QEMU's bitmap, then we'll lose track of the | |
708 | * guest modifications upon those pages (which can directly lead | |
709 | * to guest data loss or panic after migration). | |
710 | * | |
711 | * Layout of the KVMSlot.dirty_bmap: | |
712 | * | |
713 | * |<-------- bmap_npages -----------..>| | |
714 | * [1] | |
715 | * start_delta size | |
716 | * |----------------|-------------|------------------|------------| | |
717 | * ^ ^ ^ ^ | |
718 | * | | | | | |
719 | * start bmap_start (start) end | |
720 | * of memslot of memslot | |
721 | * | |
722 | * [1] bmap_npages can be aligned to either 64 pages or the end of slot | |
723 | */ | |
724 | ||
725 | assert(bmap_start % BITS_PER_LONG == 0); | |
726 | /* We should never do log_clear before log_sync */ | |
727 | assert(mem->dirty_bmap); | |
728 | if (start_delta) { | |
729 | /* Slow path - we need to manipulate a temp bitmap */ | |
730 | bmap_clear = bitmap_new(bmap_npages); | |
731 | bitmap_copy_with_src_offset(bmap_clear, mem->dirty_bmap, | |
732 | bmap_start, start_delta + size / psize); | |
733 | /* | |
734 | * We need to fill the holes at start because that was not | |
735 | * specified by the caller and we extended the bitmap only for | |
736 | * 64 pages alignment | |
737 | */ | |
738 | bitmap_clear(bmap_clear, 0, start_delta); | |
739 | d.dirty_bitmap = bmap_clear; | |
740 | } else { | |
741 | /* Fast path - start address aligns well with BITS_PER_LONG */ | |
742 | d.dirty_bitmap = mem->dirty_bmap + BIT_WORD(bmap_start); | |
743 | } | |
744 | ||
745 | d.first_page = bmap_start; | |
746 | /* It should never overflow. If it happens, say something */ | |
747 | assert(bmap_npages <= UINT32_MAX); | |
748 | d.num_pages = bmap_npages; | |
4222147d | 749 | d.slot = mem->slot | (as_id << 16); |
ff4aa114 PX |
750 | |
751 | if (kvm_vm_ioctl(s, KVM_CLEAR_DIRTY_LOG, &d) == -1) { | |
752 | ret = -errno; | |
753 | error_report("%s: KVM_CLEAR_DIRTY_LOG failed, slot=%d, " | |
754 | "start=0x%"PRIx64", size=0x%"PRIx32", errno=%d", | |
755 | __func__, d.slot, (uint64_t)d.first_page, | |
756 | (uint32_t)d.num_pages, ret); | |
757 | } else { | |
758 | ret = 0; | |
759 | trace_kvm_clear_dirty_log(d.slot, d.first_page, d.num_pages); | |
760 | } | |
761 | ||
762 | /* | |
763 | * After we have updated the remote dirty bitmap, we update the | |
764 | * cached bitmap as well for the memslot, then if another user | |
765 | * clears the same region we know we shouldn't clear it again on | |
766 | * the remote otherwise it's data loss as well. | |
767 | */ | |
768 | bitmap_clear(mem->dirty_bmap, bmap_start + start_delta, | |
769 | size / psize); | |
770 | /* This handles the NULL case well */ | |
771 | g_free(bmap_clear); | |
4222147d PB |
772 | return ret; |
773 | } | |
774 | ||
775 | ||
776 | /** | |
777 | * kvm_physical_log_clear - Clear the kernel's dirty bitmap for range | |
778 | * | |
779 | * NOTE: this will be a no-op if we haven't enabled manual dirty log | |
780 | * protection in the host kernel because in that case this operation | |
781 | * will be done within log_sync(). | |
782 | * | |
783 | * @kml: the kvm memory listener | |
784 | * @section: the memory range to clear dirty bitmap | |
785 | */ | |
786 | static int kvm_physical_log_clear(KVMMemoryListener *kml, | |
787 | MemoryRegionSection *section) | |
788 | { | |
789 | KVMState *s = kvm_state; | |
84516e5b PB |
790 | uint64_t start, size, offset, count; |
791 | KVMSlot *mem; | |
87287ac0 | 792 | int ret = 0, i; |
4222147d PB |
793 | |
794 | if (!s->manual_dirty_log_protect) { | |
795 | /* No need to do explicit clear */ | |
87287ac0 | 796 | return ret; |
4222147d PB |
797 | } |
798 | ||
799 | start = section->offset_within_address_space; | |
800 | size = int128_get64(section->size); | |
801 | ||
802 | if (!size) { | |
803 | /* Nothing more we can do... */ | |
87287ac0 | 804 | return ret; |
4222147d PB |
805 | } |
806 | ||
807 | kvm_slots_lock(kml); | |
808 | ||
4222147d PB |
809 | for (i = 0; i < s->nr_slots; i++) { |
810 | mem = &kml->slots[i]; | |
84516e5b PB |
811 | /* Discard slots that are empty or do not overlap the section */ |
812 | if (!mem->memory_size || | |
813 | mem->start_addr > start + size - 1 || | |
814 | start > mem->start_addr + mem->memory_size - 1) { | |
815 | continue; | |
816 | } | |
817 | ||
818 | if (start >= mem->start_addr) { | |
819 | /* The slot starts before section or is aligned to it. */ | |
820 | offset = start - mem->start_addr; | |
821 | count = MIN(mem->memory_size - offset, size); | |
822 | } else { | |
823 | /* The slot starts after section. */ | |
824 | offset = 0; | |
825 | count = MIN(mem->memory_size, size - (mem->start_addr - start)); | |
826 | } | |
827 | ret = kvm_log_clear_one_slot(mem, kml->as_id, offset, count); | |
828 | if (ret < 0) { | |
4222147d PB |
829 | break; |
830 | } | |
831 | } | |
832 | ||
ff4aa114 PX |
833 | kvm_slots_unlock(kml); |
834 | ||
835 | return ret; | |
836 | } | |
837 | ||
95d2994a AK |
838 | static void kvm_coalesce_mmio_region(MemoryListener *listener, |
839 | MemoryRegionSection *secion, | |
a8170e5e | 840 | hwaddr start, hwaddr size) |
f65ed4c1 | 841 | { |
f65ed4c1 AL |
842 | KVMState *s = kvm_state; |
843 | ||
844 | if (s->coalesced_mmio) { | |
845 | struct kvm_coalesced_mmio_zone zone; | |
846 | ||
847 | zone.addr = start; | |
848 | zone.size = size; | |
7e680753 | 849 | zone.pad = 0; |
f65ed4c1 | 850 | |
95d2994a | 851 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 852 | } |
f65ed4c1 AL |
853 | } |
854 | ||
95d2994a AK |
855 | static void kvm_uncoalesce_mmio_region(MemoryListener *listener, |
856 | MemoryRegionSection *secion, | |
a8170e5e | 857 | hwaddr start, hwaddr size) |
f65ed4c1 | 858 | { |
f65ed4c1 AL |
859 | KVMState *s = kvm_state; |
860 | ||
861 | if (s->coalesced_mmio) { | |
862 | struct kvm_coalesced_mmio_zone zone; | |
863 | ||
864 | zone.addr = start; | |
865 | zone.size = size; | |
7e680753 | 866 | zone.pad = 0; |
f65ed4c1 | 867 | |
95d2994a | 868 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 869 | } |
f65ed4c1 AL |
870 | } |
871 | ||
e6d34aee PH |
872 | static void kvm_coalesce_pio_add(MemoryListener *listener, |
873 | MemoryRegionSection *section, | |
874 | hwaddr start, hwaddr size) | |
875 | { | |
876 | KVMState *s = kvm_state; | |
877 | ||
878 | if (s->coalesced_pio) { | |
879 | struct kvm_coalesced_mmio_zone zone; | |
880 | ||
881 | zone.addr = start; | |
882 | zone.size = size; | |
883 | zone.pio = 1; | |
884 | ||
885 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); | |
886 | } | |
887 | } | |
888 | ||
889 | static void kvm_coalesce_pio_del(MemoryListener *listener, | |
890 | MemoryRegionSection *section, | |
891 | hwaddr start, hwaddr size) | |
892 | { | |
893 | KVMState *s = kvm_state; | |
894 | ||
895 | if (s->coalesced_pio) { | |
896 | struct kvm_coalesced_mmio_zone zone; | |
897 | ||
898 | zone.addr = start; | |
899 | zone.size = size; | |
900 | zone.pio = 1; | |
901 | ||
902 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); | |
903 | } | |
904 | } | |
905 | ||
906 | static MemoryListener kvm_coalesced_pio_listener = { | |
907 | .coalesced_io_add = kvm_coalesce_pio_add, | |
908 | .coalesced_io_del = kvm_coalesce_pio_del, | |
909 | }; | |
910 | ||
ad7b8b33 AL |
911 | int kvm_check_extension(KVMState *s, unsigned int extension) |
912 | { | |
913 | int ret; | |
914 | ||
915 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
916 | if (ret < 0) { | |
917 | ret = 0; | |
918 | } | |
919 | ||
920 | return ret; | |
921 | } | |
922 | ||
7d0a07fa AG |
923 | int kvm_vm_check_extension(KVMState *s, unsigned int extension) |
924 | { | |
925 | int ret; | |
926 | ||
927 | ret = kvm_vm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
928 | if (ret < 0) { | |
929 | /* VM wide version not implemented, use global one instead */ | |
930 | ret = kvm_check_extension(s, extension); | |
931 | } | |
932 | ||
933 | return ret; | |
934 | } | |
935 | ||
6b552b9b DG |
936 | typedef struct HWPoisonPage { |
937 | ram_addr_t ram_addr; | |
938 | QLIST_ENTRY(HWPoisonPage) list; | |
939 | } HWPoisonPage; | |
940 | ||
941 | static QLIST_HEAD(, HWPoisonPage) hwpoison_page_list = | |
942 | QLIST_HEAD_INITIALIZER(hwpoison_page_list); | |
943 | ||
944 | static void kvm_unpoison_all(void *param) | |
945 | { | |
946 | HWPoisonPage *page, *next_page; | |
947 | ||
948 | QLIST_FOREACH_SAFE(page, &hwpoison_page_list, list, next_page) { | |
949 | QLIST_REMOVE(page, list); | |
950 | qemu_ram_remap(page->ram_addr, TARGET_PAGE_SIZE); | |
951 | g_free(page); | |
952 | } | |
953 | } | |
954 | ||
955 | void kvm_hwpoison_page_add(ram_addr_t ram_addr) | |
956 | { | |
957 | HWPoisonPage *page; | |
958 | ||
959 | QLIST_FOREACH(page, &hwpoison_page_list, list) { | |
960 | if (page->ram_addr == ram_addr) { | |
961 | return; | |
962 | } | |
963 | } | |
964 | page = g_new(HWPoisonPage, 1); | |
965 | page->ram_addr = ram_addr; | |
966 | QLIST_INSERT_HEAD(&hwpoison_page_list, page, list); | |
967 | } | |
968 | ||
b680c5ba GK |
969 | static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size) |
970 | { | |
971 | #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN) | |
972 | /* The kernel expects ioeventfd values in HOST_WORDS_BIGENDIAN | |
973 | * endianness, but the memory core hands them in target endianness. | |
974 | * For example, PPC is always treated as big-endian even if running | |
975 | * on KVM and on PPC64LE. Correct here. | |
976 | */ | |
977 | switch (size) { | |
978 | case 2: | |
979 | val = bswap16(val); | |
980 | break; | |
981 | case 4: | |
982 | val = bswap32(val); | |
983 | break; | |
984 | } | |
985 | #endif | |
986 | return val; | |
987 | } | |
988 | ||
584f2be7 | 989 | static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val, |
41cb62c2 | 990 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
991 | { |
992 | int ret; | |
03a96b83 TH |
993 | struct kvm_ioeventfd iofd = { |
994 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, | |
995 | .addr = addr, | |
996 | .len = size, | |
997 | .flags = 0, | |
998 | .fd = fd, | |
999 | }; | |
500ffd4a | 1000 | |
876d16cd DDAG |
1001 | trace_kvm_set_ioeventfd_mmio(fd, (uint64_t)addr, val, assign, size, |
1002 | datamatch); | |
500ffd4a MT |
1003 | if (!kvm_enabled()) { |
1004 | return -ENOSYS; | |
1005 | } | |
1006 | ||
41cb62c2 MT |
1007 | if (datamatch) { |
1008 | iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
1009 | } | |
500ffd4a MT |
1010 | if (!assign) { |
1011 | iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
1012 | } | |
1013 | ||
1014 | ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); | |
1015 | ||
1016 | if (ret < 0) { | |
1017 | return -errno; | |
1018 | } | |
1019 | ||
1020 | return 0; | |
1021 | } | |
1022 | ||
44c3f8f7 | 1023 | static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val, |
41cb62c2 | 1024 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
1025 | { |
1026 | struct kvm_ioeventfd kick = { | |
b680c5ba | 1027 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, |
500ffd4a | 1028 | .addr = addr, |
41cb62c2 | 1029 | .flags = KVM_IOEVENTFD_FLAG_PIO, |
44c3f8f7 | 1030 | .len = size, |
500ffd4a MT |
1031 | .fd = fd, |
1032 | }; | |
1033 | int r; | |
876d16cd | 1034 | trace_kvm_set_ioeventfd_pio(fd, addr, val, assign, size, datamatch); |
500ffd4a MT |
1035 | if (!kvm_enabled()) { |
1036 | return -ENOSYS; | |
1037 | } | |
41cb62c2 MT |
1038 | if (datamatch) { |
1039 | kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
1040 | } | |
500ffd4a MT |
1041 | if (!assign) { |
1042 | kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
1043 | } | |
1044 | r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); | |
1045 | if (r < 0) { | |
1046 | return r; | |
1047 | } | |
1048 | return 0; | |
1049 | } | |
1050 | ||
1051 | ||
d2f2b8a7 SH |
1052 | static int kvm_check_many_ioeventfds(void) |
1053 | { | |
d0dcac83 SH |
1054 | /* Userspace can use ioeventfd for io notification. This requires a host |
1055 | * that supports eventfd(2) and an I/O thread; since eventfd does not | |
1056 | * support SIGIO it cannot interrupt the vcpu. | |
1057 | * | |
1058 | * Older kernels have a 6 device limit on the KVM io bus. Find out so we | |
d2f2b8a7 SH |
1059 | * can avoid creating too many ioeventfds. |
1060 | */ | |
12d4536f | 1061 | #if defined(CONFIG_EVENTFD) |
d2f2b8a7 SH |
1062 | int ioeventfds[7]; |
1063 | int i, ret = 0; | |
1064 | for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { | |
1065 | ioeventfds[i] = eventfd(0, EFD_CLOEXEC); | |
1066 | if (ioeventfds[i] < 0) { | |
1067 | break; | |
1068 | } | |
41cb62c2 | 1069 | ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true); |
d2f2b8a7 SH |
1070 | if (ret < 0) { |
1071 | close(ioeventfds[i]); | |
1072 | break; | |
1073 | } | |
1074 | } | |
1075 | ||
1076 | /* Decide whether many devices are supported or not */ | |
1077 | ret = i == ARRAY_SIZE(ioeventfds); | |
1078 | ||
1079 | while (i-- > 0) { | |
41cb62c2 | 1080 | kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true); |
d2f2b8a7 SH |
1081 | close(ioeventfds[i]); |
1082 | } | |
1083 | return ret; | |
1084 | #else | |
1085 | return 0; | |
1086 | #endif | |
1087 | } | |
1088 | ||
94a8d39a JK |
1089 | static const KVMCapabilityInfo * |
1090 | kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list) | |
1091 | { | |
1092 | while (list->name) { | |
1093 | if (!kvm_check_extension(s, list->value)) { | |
1094 | return list; | |
1095 | } | |
1096 | list++; | |
1097 | } | |
1098 | return NULL; | |
1099 | } | |
1100 | ||
023ae9a8 IM |
1101 | void kvm_set_max_memslot_size(hwaddr max_slot_size) |
1102 | { | |
1103 | g_assert( | |
1104 | ROUND_UP(max_slot_size, qemu_real_host_page_size) == max_slot_size | |
1105 | ); | |
1106 | kvm_max_slot_size = max_slot_size; | |
1107 | } | |
1108 | ||
7bbda04c PB |
1109 | static void kvm_set_phys_mem(KVMMemoryListener *kml, |
1110 | MemoryRegionSection *section, bool add) | |
46dbef6a | 1111 | { |
f357f564 | 1112 | KVMSlot *mem; |
46dbef6a | 1113 | int err; |
a01672d3 | 1114 | MemoryRegion *mr = section->mr; |
235e8982 | 1115 | bool writeable = !mr->readonly && !mr->rom_device; |
023ae9a8 | 1116 | hwaddr start_addr, size, slot_size; |
5ea69c2e | 1117 | void *ram; |
46dbef6a | 1118 | |
a01672d3 | 1119 | if (!memory_region_is_ram(mr)) { |
235e8982 JJ |
1120 | if (writeable || !kvm_readonly_mem_allowed) { |
1121 | return; | |
1122 | } else if (!mr->romd_mode) { | |
1123 | /* If the memory device is not in romd_mode, then we actually want | |
1124 | * to remove the kvm memory slot so all accesses will trap. */ | |
1125 | add = false; | |
1126 | } | |
9f213ed9 AK |
1127 | } |
1128 | ||
5ea69c2e DH |
1129 | size = kvm_align_section(section, &start_addr); |
1130 | if (!size) { | |
1131 | return; | |
1132 | } | |
1133 | ||
bbfd3017 | 1134 | /* use aligned delta to align the ram address */ |
5ea69c2e | 1135 | ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + |
bbfd3017 | 1136 | (start_addr - section->offset_within_address_space); |
a01672d3 | 1137 | |
36adac49 PX |
1138 | kvm_slots_lock(kml); |
1139 | ||
f357f564 | 1140 | if (!add) { |
023ae9a8 IM |
1141 | do { |
1142 | slot_size = MIN(kvm_max_slot_size, size); | |
1143 | mem = kvm_lookup_matching_slot(kml, start_addr, slot_size); | |
1144 | if (!mem) { | |
1145 | goto out; | |
1146 | } | |
1147 | if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { | |
1148 | kvm_physical_sync_dirty_bitmap(kml, section); | |
1149 | } | |
3fbffb62 | 1150 | |
023ae9a8 IM |
1151 | /* unregister the slot */ |
1152 | g_free(mem->dirty_bmap); | |
1153 | mem->dirty_bmap = NULL; | |
1154 | mem->memory_size = 0; | |
1155 | mem->flags = 0; | |
1156 | err = kvm_set_user_memory_region(kml, mem, false); | |
1157 | if (err) { | |
1158 | fprintf(stderr, "%s: error unregistering slot: %s\n", | |
1159 | __func__, strerror(-err)); | |
1160 | abort(); | |
1161 | } | |
1162 | start_addr += slot_size; | |
1163 | size -= slot_size; | |
1164 | } while (size); | |
36adac49 | 1165 | goto out; |
46dbef6a MT |
1166 | } |
1167 | ||
f357f564 | 1168 | /* register the new slot */ |
023ae9a8 IM |
1169 | do { |
1170 | slot_size = MIN(kvm_max_slot_size, size); | |
1171 | mem = kvm_alloc_slot(kml); | |
1172 | mem->memory_size = slot_size; | |
1173 | mem->start_addr = start_addr; | |
1174 | mem->ram = ram; | |
1175 | mem->flags = kvm_mem_flags(mr); | |
1176 | ||
9b3a31c7 DDAG |
1177 | if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { |
1178 | /* | |
1179 | * Reallocate the bmap; it means it doesn't disappear in | |
1180 | * middle of a migrate. | |
1181 | */ | |
1182 | kvm_memslot_init_dirty_bitmap(mem); | |
1183 | } | |
023ae9a8 IM |
1184 | err = kvm_set_user_memory_region(kml, mem, true); |
1185 | if (err) { | |
1186 | fprintf(stderr, "%s: error registering slot: %s\n", __func__, | |
1187 | strerror(-err)); | |
1188 | abort(); | |
1189 | } | |
1190 | start_addr += slot_size; | |
1191 | ram += slot_size; | |
1192 | size -= slot_size; | |
1193 | } while (size); | |
36adac49 PX |
1194 | |
1195 | out: | |
1196 | kvm_slots_unlock(kml); | |
46dbef6a MT |
1197 | } |
1198 | ||
a01672d3 AK |
1199 | static void kvm_region_add(MemoryListener *listener, |
1200 | MemoryRegionSection *section) | |
1201 | { | |
7bbda04c PB |
1202 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
1203 | ||
dfde4e6e | 1204 | memory_region_ref(section->mr); |
7bbda04c | 1205 | kvm_set_phys_mem(kml, section, true); |
a01672d3 AK |
1206 | } |
1207 | ||
1208 | static void kvm_region_del(MemoryListener *listener, | |
1209 | MemoryRegionSection *section) | |
1210 | { | |
7bbda04c PB |
1211 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
1212 | ||
1213 | kvm_set_phys_mem(kml, section, false); | |
dfde4e6e | 1214 | memory_region_unref(section->mr); |
a01672d3 AK |
1215 | } |
1216 | ||
1217 | static void kvm_log_sync(MemoryListener *listener, | |
1218 | MemoryRegionSection *section) | |
7b8f3b78 | 1219 | { |
7bbda04c | 1220 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
1221 | int r; |
1222 | ||
36adac49 | 1223 | kvm_slots_lock(kml); |
7bbda04c | 1224 | r = kvm_physical_sync_dirty_bitmap(kml, section); |
36adac49 | 1225 | kvm_slots_unlock(kml); |
a01672d3 AK |
1226 | if (r < 0) { |
1227 | abort(); | |
1228 | } | |
7b8f3b78 MT |
1229 | } |
1230 | ||
ff4aa114 PX |
1231 | static void kvm_log_clear(MemoryListener *listener, |
1232 | MemoryRegionSection *section) | |
1233 | { | |
1234 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); | |
1235 | int r; | |
1236 | ||
1237 | r = kvm_physical_log_clear(kml, section); | |
1238 | if (r < 0) { | |
1239 | error_report_once("%s: kvm log clear failed: mr=%s " | |
1240 | "offset=%"HWADDR_PRIx" size=%"PRIx64, __func__, | |
1241 | section->mr->name, section->offset_within_region, | |
1242 | int128_get64(section->size)); | |
1243 | abort(); | |
1244 | } | |
1245 | } | |
1246 | ||
d22b096e AK |
1247 | static void kvm_mem_ioeventfd_add(MemoryListener *listener, |
1248 | MemoryRegionSection *section, | |
1249 | bool match_data, uint64_t data, | |
1250 | EventNotifier *e) | |
1251 | { | |
1252 | int fd = event_notifier_get_fd(e); | |
80a1ea37 AK |
1253 | int r; |
1254 | ||
4b8f1c88 | 1255 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
1256 | data, true, int128_get64(section->size), |
1257 | match_data); | |
80a1ea37 | 1258 | if (r < 0) { |
e346bcbf YK |
1259 | fprintf(stderr, "%s: error adding ioeventfd: %s (%d)\n", |
1260 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1261 | abort(); |
1262 | } | |
1263 | } | |
1264 | ||
d22b096e AK |
1265 | static void kvm_mem_ioeventfd_del(MemoryListener *listener, |
1266 | MemoryRegionSection *section, | |
1267 | bool match_data, uint64_t data, | |
1268 | EventNotifier *e) | |
80a1ea37 | 1269 | { |
d22b096e | 1270 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
1271 | int r; |
1272 | ||
4b8f1c88 | 1273 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
1274 | data, false, int128_get64(section->size), |
1275 | match_data); | |
80a1ea37 | 1276 | if (r < 0) { |
e346bcbf YK |
1277 | fprintf(stderr, "%s: error deleting ioeventfd: %s (%d)\n", |
1278 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1279 | abort(); |
1280 | } | |
1281 | } | |
1282 | ||
d22b096e AK |
1283 | static void kvm_io_ioeventfd_add(MemoryListener *listener, |
1284 | MemoryRegionSection *section, | |
1285 | bool match_data, uint64_t data, | |
1286 | EventNotifier *e) | |
80a1ea37 | 1287 | { |
d22b096e | 1288 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
1289 | int r; |
1290 | ||
44c3f8f7 | 1291 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
1292 | data, true, int128_get64(section->size), |
1293 | match_data); | |
80a1ea37 | 1294 | if (r < 0) { |
e346bcbf YK |
1295 | fprintf(stderr, "%s: error adding ioeventfd: %s (%d)\n", |
1296 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1297 | abort(); |
1298 | } | |
1299 | } | |
1300 | ||
d22b096e AK |
1301 | static void kvm_io_ioeventfd_del(MemoryListener *listener, |
1302 | MemoryRegionSection *section, | |
1303 | bool match_data, uint64_t data, | |
1304 | EventNotifier *e) | |
80a1ea37 AK |
1305 | |
1306 | { | |
d22b096e | 1307 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
1308 | int r; |
1309 | ||
44c3f8f7 | 1310 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
1311 | data, false, int128_get64(section->size), |
1312 | match_data); | |
80a1ea37 | 1313 | if (r < 0) { |
e346bcbf YK |
1314 | fprintf(stderr, "%s: error deleting ioeventfd: %s (%d)\n", |
1315 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1316 | abort(); |
1317 | } | |
1318 | } | |
1319 | ||
38bfe691 PB |
1320 | void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml, |
1321 | AddressSpace *as, int as_id) | |
7bbda04c PB |
1322 | { |
1323 | int i; | |
1324 | ||
36adac49 | 1325 | qemu_mutex_init(&kml->slots_lock); |
7bbda04c | 1326 | kml->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot)); |
38bfe691 | 1327 | kml->as_id = as_id; |
7bbda04c PB |
1328 | |
1329 | for (i = 0; i < s->nr_slots; i++) { | |
1330 | kml->slots[i].slot = i; | |
1331 | } | |
1332 | ||
1333 | kml->listener.region_add = kvm_region_add; | |
1334 | kml->listener.region_del = kvm_region_del; | |
1335 | kml->listener.log_start = kvm_log_start; | |
1336 | kml->listener.log_stop = kvm_log_stop; | |
1337 | kml->listener.log_sync = kvm_log_sync; | |
ff4aa114 | 1338 | kml->listener.log_clear = kvm_log_clear; |
7bbda04c PB |
1339 | kml->listener.priority = 10; |
1340 | ||
1341 | memory_listener_register(&kml->listener, as); | |
8072aae3 AK |
1342 | |
1343 | for (i = 0; i < s->nr_as; ++i) { | |
1344 | if (!s->as[i].as) { | |
1345 | s->as[i].as = as; | |
1346 | s->as[i].ml = kml; | |
1347 | break; | |
1348 | } | |
1349 | } | |
7bbda04c | 1350 | } |
d22b096e AK |
1351 | |
1352 | static MemoryListener kvm_io_listener = { | |
d22b096e AK |
1353 | .eventfd_add = kvm_io_ioeventfd_add, |
1354 | .eventfd_del = kvm_io_ioeventfd_del, | |
72e22d2f | 1355 | .priority = 10, |
7b8f3b78 MT |
1356 | }; |
1357 | ||
3889c3fa | 1358 | int kvm_set_irq(KVMState *s, int irq, int level) |
84b058d7 JK |
1359 | { |
1360 | struct kvm_irq_level event; | |
1361 | int ret; | |
1362 | ||
7ae26bd4 | 1363 | assert(kvm_async_interrupts_enabled()); |
84b058d7 JK |
1364 | |
1365 | event.level = level; | |
1366 | event.irq = irq; | |
e333cd69 | 1367 | ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event); |
84b058d7 | 1368 | if (ret < 0) { |
3889c3fa | 1369 | perror("kvm_set_irq"); |
84b058d7 JK |
1370 | abort(); |
1371 | } | |
1372 | ||
e333cd69 | 1373 | return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status; |
84b058d7 JK |
1374 | } |
1375 | ||
1376 | #ifdef KVM_CAP_IRQ_ROUTING | |
d3d3bef0 JK |
1377 | typedef struct KVMMSIRoute { |
1378 | struct kvm_irq_routing_entry kroute; | |
1379 | QTAILQ_ENTRY(KVMMSIRoute) entry; | |
1380 | } KVMMSIRoute; | |
1381 | ||
84b058d7 JK |
1382 | static void set_gsi(KVMState *s, unsigned int gsi) |
1383 | { | |
8269fb70 | 1384 | set_bit(gsi, s->used_gsi_bitmap); |
84b058d7 JK |
1385 | } |
1386 | ||
04fa27f5 JK |
1387 | static void clear_gsi(KVMState *s, unsigned int gsi) |
1388 | { | |
8269fb70 | 1389 | clear_bit(gsi, s->used_gsi_bitmap); |
04fa27f5 JK |
1390 | } |
1391 | ||
7b774593 | 1392 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 | 1393 | { |
04fa27f5 | 1394 | int gsi_count, i; |
84b058d7 | 1395 | |
00008418 | 1396 | gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1; |
84b058d7 | 1397 | if (gsi_count > 0) { |
84b058d7 | 1398 | /* Round up so we can search ints using ffs */ |
8269fb70 | 1399 | s->used_gsi_bitmap = bitmap_new(gsi_count); |
4e2e4e63 | 1400 | s->gsi_count = gsi_count; |
84b058d7 JK |
1401 | } |
1402 | ||
1403 | s->irq_routes = g_malloc0(sizeof(*s->irq_routes)); | |
1404 | s->nr_allocated_irq_routes = 0; | |
1405 | ||
50bf31b9 | 1406 | if (!kvm_direct_msi_allowed) { |
4a3adebb JK |
1407 | for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) { |
1408 | QTAILQ_INIT(&s->msi_hashtab[i]); | |
1409 | } | |
04fa27f5 JK |
1410 | } |
1411 | ||
84b058d7 JK |
1412 | kvm_arch_init_irq_routing(s); |
1413 | } | |
1414 | ||
cb925cf9 | 1415 | void kvm_irqchip_commit_routes(KVMState *s) |
e7b20308 JK |
1416 | { |
1417 | int ret; | |
1418 | ||
7005f7f8 PX |
1419 | if (kvm_gsi_direct_mapping()) { |
1420 | return; | |
1421 | } | |
1422 | ||
1423 | if (!kvm_gsi_routing_enabled()) { | |
1424 | return; | |
1425 | } | |
1426 | ||
e7b20308 | 1427 | s->irq_routes->flags = 0; |
54a6c11b | 1428 | trace_kvm_irqchip_commit_routes(); |
e7b20308 JK |
1429 | ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); |
1430 | assert(ret == 0); | |
1431 | } | |
1432 | ||
84b058d7 JK |
1433 | static void kvm_add_routing_entry(KVMState *s, |
1434 | struct kvm_irq_routing_entry *entry) | |
1435 | { | |
1436 | struct kvm_irq_routing_entry *new; | |
1437 | int n, size; | |
1438 | ||
1439 | if (s->irq_routes->nr == s->nr_allocated_irq_routes) { | |
1440 | n = s->nr_allocated_irq_routes * 2; | |
1441 | if (n < 64) { | |
1442 | n = 64; | |
1443 | } | |
1444 | size = sizeof(struct kvm_irq_routing); | |
1445 | size += n * sizeof(*new); | |
1446 | s->irq_routes = g_realloc(s->irq_routes, size); | |
1447 | s->nr_allocated_irq_routes = n; | |
1448 | } | |
1449 | n = s->irq_routes->nr++; | |
1450 | new = &s->irq_routes->entries[n]; | |
0fbc2074 MT |
1451 | |
1452 | *new = *entry; | |
84b058d7 JK |
1453 | |
1454 | set_gsi(s, entry->gsi); | |
1455 | } | |
1456 | ||
cc57407e JK |
1457 | static int kvm_update_routing_entry(KVMState *s, |
1458 | struct kvm_irq_routing_entry *new_entry) | |
1459 | { | |
1460 | struct kvm_irq_routing_entry *entry; | |
1461 | int n; | |
1462 | ||
1463 | for (n = 0; n < s->irq_routes->nr; n++) { | |
1464 | entry = &s->irq_routes->entries[n]; | |
1465 | if (entry->gsi != new_entry->gsi) { | |
1466 | continue; | |
1467 | } | |
1468 | ||
40509f7f MT |
1469 | if(!memcmp(entry, new_entry, sizeof *entry)) { |
1470 | return 0; | |
1471 | } | |
1472 | ||
0fbc2074 | 1473 | *entry = *new_entry; |
cc57407e | 1474 | |
cc57407e JK |
1475 | return 0; |
1476 | } | |
1477 | ||
1478 | return -ESRCH; | |
1479 | } | |
1480 | ||
1df186df | 1481 | void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin) |
84b058d7 | 1482 | { |
0fbc2074 | 1483 | struct kvm_irq_routing_entry e = {}; |
84b058d7 | 1484 | |
4e2e4e63 JK |
1485 | assert(pin < s->gsi_count); |
1486 | ||
84b058d7 JK |
1487 | e.gsi = irq; |
1488 | e.type = KVM_IRQ_ROUTING_IRQCHIP; | |
1489 | e.flags = 0; | |
1490 | e.u.irqchip.irqchip = irqchip; | |
1491 | e.u.irqchip.pin = pin; | |
1492 | kvm_add_routing_entry(s, &e); | |
1493 | } | |
1494 | ||
1e2aa8be | 1495 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
04fa27f5 JK |
1496 | { |
1497 | struct kvm_irq_routing_entry *e; | |
1498 | int i; | |
1499 | ||
76fe21de AK |
1500 | if (kvm_gsi_direct_mapping()) { |
1501 | return; | |
1502 | } | |
1503 | ||
04fa27f5 JK |
1504 | for (i = 0; i < s->irq_routes->nr; i++) { |
1505 | e = &s->irq_routes->entries[i]; | |
1506 | if (e->gsi == virq) { | |
1507 | s->irq_routes->nr--; | |
1508 | *e = s->irq_routes->entries[s->irq_routes->nr]; | |
1509 | } | |
1510 | } | |
1511 | clear_gsi(s, virq); | |
38d87493 | 1512 | kvm_arch_release_virq_post(virq); |
9ba35d0b | 1513 | trace_kvm_irqchip_release_virq(virq); |
04fa27f5 JK |
1514 | } |
1515 | ||
3607715a DG |
1516 | void kvm_irqchip_add_change_notifier(Notifier *n) |
1517 | { | |
1518 | notifier_list_add(&kvm_irqchip_change_notifiers, n); | |
1519 | } | |
1520 | ||
1521 | void kvm_irqchip_remove_change_notifier(Notifier *n) | |
1522 | { | |
1523 | notifier_remove(n); | |
1524 | } | |
1525 | ||
1526 | void kvm_irqchip_change_notify(void) | |
1527 | { | |
1528 | notifier_list_notify(&kvm_irqchip_change_notifiers, NULL); | |
1529 | } | |
1530 | ||
04fa27f5 JK |
1531 | static unsigned int kvm_hash_msi(uint32_t data) |
1532 | { | |
1533 | /* This is optimized for IA32 MSI layout. However, no other arch shall | |
1534 | * repeat the mistake of not providing a direct MSI injection API. */ | |
1535 | return data & 0xff; | |
1536 | } | |
1537 | ||
1538 | static void kvm_flush_dynamic_msi_routes(KVMState *s) | |
1539 | { | |
1540 | KVMMSIRoute *route, *next; | |
1541 | unsigned int hash; | |
1542 | ||
1543 | for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) { | |
1544 | QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) { | |
1545 | kvm_irqchip_release_virq(s, route->kroute.gsi); | |
1546 | QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry); | |
1547 | g_free(route); | |
1548 | } | |
1549 | } | |
1550 | } | |
1551 | ||
1552 | static int kvm_irqchip_get_virq(KVMState *s) | |
1553 | { | |
8269fb70 | 1554 | int next_virq; |
04fa27f5 | 1555 | |
bdf02631 WM |
1556 | /* |
1557 | * PIC and IOAPIC share the first 16 GSI numbers, thus the available | |
1558 | * GSI numbers are more than the number of IRQ route. Allocating a GSI | |
1559 | * number can succeed even though a new route entry cannot be added. | |
1560 | * When this happens, flush dynamic MSI entries to free IRQ route entries. | |
1561 | */ | |
50bf31b9 | 1562 | if (!kvm_direct_msi_allowed && s->irq_routes->nr == s->gsi_count) { |
bdf02631 WM |
1563 | kvm_flush_dynamic_msi_routes(s); |
1564 | } | |
1565 | ||
04fa27f5 | 1566 | /* Return the lowest unused GSI in the bitmap */ |
8269fb70 WY |
1567 | next_virq = find_first_zero_bit(s->used_gsi_bitmap, s->gsi_count); |
1568 | if (next_virq >= s->gsi_count) { | |
1569 | return -ENOSPC; | |
1570 | } else { | |
1571 | return next_virq; | |
04fa27f5 | 1572 | } |
04fa27f5 JK |
1573 | } |
1574 | ||
1575 | static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg) | |
1576 | { | |
1577 | unsigned int hash = kvm_hash_msi(msg.data); | |
1578 | KVMMSIRoute *route; | |
1579 | ||
1580 | QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) { | |
1581 | if (route->kroute.u.msi.address_lo == (uint32_t)msg.address && | |
1582 | route->kroute.u.msi.address_hi == (msg.address >> 32) && | |
d07cc1f1 | 1583 | route->kroute.u.msi.data == le32_to_cpu(msg.data)) { |
04fa27f5 JK |
1584 | return route; |
1585 | } | |
1586 | } | |
1587 | return NULL; | |
1588 | } | |
1589 | ||
1590 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1591 | { | |
4a3adebb | 1592 | struct kvm_msi msi; |
04fa27f5 JK |
1593 | KVMMSIRoute *route; |
1594 | ||
50bf31b9 | 1595 | if (kvm_direct_msi_allowed) { |
4a3adebb JK |
1596 | msi.address_lo = (uint32_t)msg.address; |
1597 | msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1598 | msi.data = le32_to_cpu(msg.data); |
4a3adebb JK |
1599 | msi.flags = 0; |
1600 | memset(msi.pad, 0, sizeof(msi.pad)); | |
1601 | ||
1602 | return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi); | |
1603 | } | |
1604 | ||
04fa27f5 JK |
1605 | route = kvm_lookup_msi_route(s, msg); |
1606 | if (!route) { | |
e7b20308 | 1607 | int virq; |
04fa27f5 JK |
1608 | |
1609 | virq = kvm_irqchip_get_virq(s); | |
1610 | if (virq < 0) { | |
1611 | return virq; | |
1612 | } | |
1613 | ||
0fbc2074 | 1614 | route = g_malloc0(sizeof(KVMMSIRoute)); |
04fa27f5 JK |
1615 | route->kroute.gsi = virq; |
1616 | route->kroute.type = KVM_IRQ_ROUTING_MSI; | |
1617 | route->kroute.flags = 0; | |
1618 | route->kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1619 | route->kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1620 | route->kroute.u.msi.data = le32_to_cpu(msg.data); |
04fa27f5 JK |
1621 | |
1622 | kvm_add_routing_entry(s, &route->kroute); | |
cb925cf9 | 1623 | kvm_irqchip_commit_routes(s); |
04fa27f5 JK |
1624 | |
1625 | QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route, | |
1626 | entry); | |
04fa27f5 JK |
1627 | } |
1628 | ||
1629 | assert(route->kroute.type == KVM_IRQ_ROUTING_MSI); | |
1630 | ||
3889c3fa | 1631 | return kvm_set_irq(s, route->kroute.gsi, 1); |
04fa27f5 JK |
1632 | } |
1633 | ||
d1f6af6a | 1634 | int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) |
92b4e489 | 1635 | { |
0fbc2074 | 1636 | struct kvm_irq_routing_entry kroute = {}; |
92b4e489 | 1637 | int virq; |
d1f6af6a PX |
1638 | MSIMessage msg = {0, 0}; |
1639 | ||
88c725c7 | 1640 | if (pci_available && dev) { |
e1d4fb2d | 1641 | msg = pci_get_msi_message(dev, vector); |
d1f6af6a | 1642 | } |
92b4e489 | 1643 | |
76fe21de | 1644 | if (kvm_gsi_direct_mapping()) { |
1850b6b7 | 1645 | return kvm_arch_msi_data_to_gsi(msg.data); |
76fe21de AK |
1646 | } |
1647 | ||
f3e1bed8 | 1648 | if (!kvm_gsi_routing_enabled()) { |
92b4e489 JK |
1649 | return -ENOSYS; |
1650 | } | |
1651 | ||
1652 | virq = kvm_irqchip_get_virq(s); | |
1653 | if (virq < 0) { | |
1654 | return virq; | |
1655 | } | |
1656 | ||
1657 | kroute.gsi = virq; | |
1658 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1659 | kroute.flags = 0; | |
1660 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1661 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1662 | kroute.u.msi.data = le32_to_cpu(msg.data); |
88c725c7 | 1663 | if (pci_available && kvm_msi_devid_required()) { |
767a554a PF |
1664 | kroute.flags = KVM_MSI_VALID_DEVID; |
1665 | kroute.u.msi.devid = pci_requester_id(dev); | |
1666 | } | |
dc9f06ca | 1667 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { |
9e03a040 FB |
1668 | kvm_irqchip_release_virq(s, virq); |
1669 | return -EINVAL; | |
1670 | } | |
92b4e489 | 1671 | |
9ba35d0b PX |
1672 | trace_kvm_irqchip_add_msi_route(dev ? dev->name : (char *)"N/A", |
1673 | vector, virq); | |
54a6c11b | 1674 | |
92b4e489 | 1675 | kvm_add_routing_entry(s, &kroute); |
38d87493 | 1676 | kvm_arch_add_msi_route_post(&kroute, vector, dev); |
cb925cf9 | 1677 | kvm_irqchip_commit_routes(s); |
92b4e489 JK |
1678 | |
1679 | return virq; | |
1680 | } | |
1681 | ||
dc9f06ca PF |
1682 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg, |
1683 | PCIDevice *dev) | |
cc57407e | 1684 | { |
0fbc2074 | 1685 | struct kvm_irq_routing_entry kroute = {}; |
cc57407e | 1686 | |
76fe21de AK |
1687 | if (kvm_gsi_direct_mapping()) { |
1688 | return 0; | |
1689 | } | |
1690 | ||
cc57407e JK |
1691 | if (!kvm_irqchip_in_kernel()) { |
1692 | return -ENOSYS; | |
1693 | } | |
1694 | ||
1695 | kroute.gsi = virq; | |
1696 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1697 | kroute.flags = 0; | |
1698 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1699 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1700 | kroute.u.msi.data = le32_to_cpu(msg.data); |
88c725c7 | 1701 | if (pci_available && kvm_msi_devid_required()) { |
767a554a PF |
1702 | kroute.flags = KVM_MSI_VALID_DEVID; |
1703 | kroute.u.msi.devid = pci_requester_id(dev); | |
1704 | } | |
dc9f06ca | 1705 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { |
9e03a040 FB |
1706 | return -EINVAL; |
1707 | } | |
cc57407e | 1708 | |
54a6c11b PX |
1709 | trace_kvm_irqchip_update_msi_route(virq); |
1710 | ||
cc57407e JK |
1711 | return kvm_update_routing_entry(s, &kroute); |
1712 | } | |
1713 | ||
ff66ba87 PX |
1714 | static int kvm_irqchip_assign_irqfd(KVMState *s, EventNotifier *event, |
1715 | EventNotifier *resample, int virq, | |
ca916d37 | 1716 | bool assign) |
39853bbc | 1717 | { |
ff66ba87 PX |
1718 | int fd = event_notifier_get_fd(event); |
1719 | int rfd = resample ? event_notifier_get_fd(resample) : -1; | |
1720 | ||
39853bbc JK |
1721 | struct kvm_irqfd irqfd = { |
1722 | .fd = fd, | |
1723 | .gsi = virq, | |
1724 | .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN, | |
1725 | }; | |
1726 | ||
ca916d37 | 1727 | if (rfd != -1) { |
c82d9d43 PX |
1728 | assert(assign); |
1729 | if (kvm_irqchip_is_split()) { | |
1730 | /* | |
1731 | * When the slow irqchip (e.g. IOAPIC) is in the | |
1732 | * userspace, KVM kernel resamplefd will not work because | |
1733 | * the EOI of the interrupt will be delivered to userspace | |
1734 | * instead, so the KVM kernel resamplefd kick will be | |
1735 | * skipped. The userspace here mimics what the kernel | |
1736 | * provides with resamplefd, remember the resamplefd and | |
1737 | * kick it when we receive EOI of this IRQ. | |
1738 | * | |
1739 | * This is hackery because IOAPIC is mostly bypassed | |
1740 | * (except EOI broadcasts) when irqfd is used. However | |
1741 | * this can bring much performance back for split irqchip | |
1742 | * with INTx IRQs (for VFIO, this gives 93% perf of the | |
1743 | * full fast path, which is 46% perf boost comparing to | |
1744 | * the INTx slow path). | |
1745 | */ | |
1746 | kvm_resample_fd_insert(virq, resample); | |
1747 | } else { | |
1748 | irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE; | |
1749 | irqfd.resamplefd = rfd; | |
1750 | } | |
1751 | } else if (!assign) { | |
1752 | if (kvm_irqchip_is_split()) { | |
1753 | kvm_resample_fd_remove(virq); | |
1754 | } | |
ca916d37 VM |
1755 | } |
1756 | ||
cc7e0ddf | 1757 | if (!kvm_irqfds_enabled()) { |
39853bbc JK |
1758 | return -ENOSYS; |
1759 | } | |
1760 | ||
1761 | return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd); | |
1762 | } | |
1763 | ||
d426d9fb CH |
1764 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
1765 | { | |
e9af2fef | 1766 | struct kvm_irq_routing_entry kroute = {}; |
d426d9fb CH |
1767 | int virq; |
1768 | ||
1769 | if (!kvm_gsi_routing_enabled()) { | |
1770 | return -ENOSYS; | |
1771 | } | |
1772 | ||
1773 | virq = kvm_irqchip_get_virq(s); | |
1774 | if (virq < 0) { | |
1775 | return virq; | |
1776 | } | |
1777 | ||
1778 | kroute.gsi = virq; | |
1779 | kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER; | |
1780 | kroute.flags = 0; | |
1781 | kroute.u.adapter.summary_addr = adapter->summary_addr; | |
1782 | kroute.u.adapter.ind_addr = adapter->ind_addr; | |
1783 | kroute.u.adapter.summary_offset = adapter->summary_offset; | |
1784 | kroute.u.adapter.ind_offset = adapter->ind_offset; | |
1785 | kroute.u.adapter.adapter_id = adapter->adapter_id; | |
1786 | ||
1787 | kvm_add_routing_entry(s, &kroute); | |
d426d9fb CH |
1788 | |
1789 | return virq; | |
1790 | } | |
1791 | ||
977a8d9c AS |
1792 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) |
1793 | { | |
1794 | struct kvm_irq_routing_entry kroute = {}; | |
1795 | int virq; | |
1796 | ||
1797 | if (!kvm_gsi_routing_enabled()) { | |
1798 | return -ENOSYS; | |
1799 | } | |
1800 | if (!kvm_check_extension(s, KVM_CAP_HYPERV_SYNIC)) { | |
1801 | return -ENOSYS; | |
1802 | } | |
1803 | virq = kvm_irqchip_get_virq(s); | |
1804 | if (virq < 0) { | |
1805 | return virq; | |
1806 | } | |
1807 | ||
1808 | kroute.gsi = virq; | |
1809 | kroute.type = KVM_IRQ_ROUTING_HV_SINT; | |
1810 | kroute.flags = 0; | |
1811 | kroute.u.hv_sint.vcpu = vcpu; | |
1812 | kroute.u.hv_sint.sint = sint; | |
1813 | ||
1814 | kvm_add_routing_entry(s, &kroute); | |
1815 | kvm_irqchip_commit_routes(s); | |
1816 | ||
1817 | return virq; | |
1818 | } | |
1819 | ||
84b058d7 JK |
1820 | #else /* !KVM_CAP_IRQ_ROUTING */ |
1821 | ||
7b774593 | 1822 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 JK |
1823 | { |
1824 | } | |
04fa27f5 | 1825 | |
d3d3bef0 JK |
1826 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
1827 | { | |
1828 | } | |
1829 | ||
04fa27f5 JK |
1830 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) |
1831 | { | |
1832 | abort(); | |
1833 | } | |
92b4e489 | 1834 | |
d1f6af6a | 1835 | int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) |
92b4e489 | 1836 | { |
df410675 | 1837 | return -ENOSYS; |
92b4e489 | 1838 | } |
39853bbc | 1839 | |
d426d9fb CH |
1840 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
1841 | { | |
1842 | return -ENOSYS; | |
1843 | } | |
1844 | ||
977a8d9c AS |
1845 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) |
1846 | { | |
1847 | return -ENOSYS; | |
1848 | } | |
1849 | ||
ff66ba87 PX |
1850 | static int kvm_irqchip_assign_irqfd(KVMState *s, EventNotifier *event, |
1851 | EventNotifier *resample, int virq, | |
1852 | bool assign) | |
39853bbc JK |
1853 | { |
1854 | abort(); | |
1855 | } | |
dabe3143 MT |
1856 | |
1857 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) | |
1858 | { | |
1859 | return -ENOSYS; | |
1860 | } | |
84b058d7 JK |
1861 | #endif /* !KVM_CAP_IRQ_ROUTING */ |
1862 | ||
1c9b71a7 EA |
1863 | int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, |
1864 | EventNotifier *rn, int virq) | |
39853bbc | 1865 | { |
ff66ba87 | 1866 | return kvm_irqchip_assign_irqfd(s, n, rn, virq, true); |
39853bbc JK |
1867 | } |
1868 | ||
1c9b71a7 EA |
1869 | int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, |
1870 | int virq) | |
15b2bd18 | 1871 | { |
ff66ba87 | 1872 | return kvm_irqchip_assign_irqfd(s, n, NULL, virq, false); |
15b2bd18 PB |
1873 | } |
1874 | ||
197e3524 EA |
1875 | int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, |
1876 | EventNotifier *rn, qemu_irq irq) | |
1877 | { | |
1878 | gpointer key, gsi; | |
1879 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
1880 | ||
1881 | if (!found) { | |
1882 | return -ENXIO; | |
1883 | } | |
1884 | return kvm_irqchip_add_irqfd_notifier_gsi(s, n, rn, GPOINTER_TO_INT(gsi)); | |
1885 | } | |
1886 | ||
1887 | int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, | |
1888 | qemu_irq irq) | |
1889 | { | |
1890 | gpointer key, gsi; | |
1891 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
1892 | ||
1893 | if (!found) { | |
1894 | return -ENXIO; | |
1895 | } | |
1896 | return kvm_irqchip_remove_irqfd_notifier_gsi(s, n, GPOINTER_TO_INT(gsi)); | |
1897 | } | |
1898 | ||
1899 | void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi) | |
1900 | { | |
1901 | g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi)); | |
1902 | } | |
1903 | ||
4376c40d | 1904 | static void kvm_irqchip_create(KVMState *s) |
84b058d7 | 1905 | { |
84b058d7 JK |
1906 | int ret; |
1907 | ||
d1972be1 | 1908 | assert(s->kernel_irqchip_split != ON_OFF_AUTO_AUTO); |
8db4936b PB |
1909 | if (kvm_check_extension(s, KVM_CAP_IRQCHIP)) { |
1910 | ; | |
1911 | } else if (kvm_check_extension(s, KVM_CAP_S390_IRQCHIP)) { | |
1912 | ret = kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0); | |
1913 | if (ret < 0) { | |
1914 | fprintf(stderr, "Enable kernel irqchip failed: %s\n", strerror(-ret)); | |
1915 | exit(1); | |
1916 | } | |
1917 | } else { | |
1918 | return; | |
84b058d7 JK |
1919 | } |
1920 | ||
d6032e06 CD |
1921 | /* First probe and see if there's a arch-specific hook to create the |
1922 | * in-kernel irqchip for us */ | |
4376c40d | 1923 | ret = kvm_arch_irqchip_create(s); |
8db4936b | 1924 | if (ret == 0) { |
d1972be1 | 1925 | if (s->kernel_irqchip_split == ON_OFF_AUTO_ON) { |
15eafc2e PB |
1926 | perror("Split IRQ chip mode not supported."); |
1927 | exit(1); | |
1928 | } else { | |
1929 | ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); | |
1930 | } | |
8db4936b PB |
1931 | } |
1932 | if (ret < 0) { | |
1933 | fprintf(stderr, "Create kernel irqchip failed: %s\n", strerror(-ret)); | |
1934 | exit(1); | |
84b058d7 JK |
1935 | } |
1936 | ||
3d4b2649 | 1937 | kvm_kernel_irqchip = true; |
7ae26bd4 PM |
1938 | /* If we have an in-kernel IRQ chip then we must have asynchronous |
1939 | * interrupt delivery (though the reverse is not necessarily true) | |
1940 | */ | |
1941 | kvm_async_interrupts_allowed = true; | |
215e79c0 | 1942 | kvm_halt_in_kernel_allowed = true; |
84b058d7 JK |
1943 | |
1944 | kvm_init_irq_routing(s); | |
1945 | ||
197e3524 | 1946 | s->gsimap = g_hash_table_new(g_direct_hash, g_direct_equal); |
84b058d7 JK |
1947 | } |
1948 | ||
670436ce AJ |
1949 | /* Find number of supported CPUs using the recommended |
1950 | * procedure from the kernel API documentation to cope with | |
1951 | * older kernels that may be missing capabilities. | |
1952 | */ | |
1953 | static int kvm_recommended_vcpus(KVMState *s) | |
3ed444e9 | 1954 | { |
11748ba7 | 1955 | int ret = kvm_vm_check_extension(s, KVM_CAP_NR_VCPUS); |
670436ce AJ |
1956 | return (ret) ? ret : 4; |
1957 | } | |
3ed444e9 | 1958 | |
670436ce AJ |
1959 | static int kvm_max_vcpus(KVMState *s) |
1960 | { | |
1961 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS); | |
1962 | return (ret) ? ret : kvm_recommended_vcpus(s); | |
3ed444e9 DH |
1963 | } |
1964 | ||
f31e3266 GK |
1965 | static int kvm_max_vcpu_id(KVMState *s) |
1966 | { | |
1967 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPU_ID); | |
1968 | return (ret) ? ret : kvm_max_vcpus(s); | |
1969 | } | |
1970 | ||
41264b38 GK |
1971 | bool kvm_vcpu_id_is_valid(int vcpu_id) |
1972 | { | |
4f7f5893 | 1973 | KVMState *s = KVM_STATE(current_accel()); |
f31e3266 | 1974 | return vcpu_id >= 0 && vcpu_id < kvm_max_vcpu_id(s); |
41264b38 GK |
1975 | } |
1976 | ||
f6a1ef64 | 1977 | static int kvm_init(MachineState *ms) |
05330448 | 1978 | { |
f6a1ef64 | 1979 | MachineClass *mc = MACHINE_GET_CLASS(ms); |
168ccc11 JK |
1980 | static const char upgrade_note[] = |
1981 | "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" | |
1982 | "(see http://sourceforge.net/projects/kvm).\n"; | |
670436ce AJ |
1983 | struct { |
1984 | const char *name; | |
1985 | int num; | |
1986 | } num_cpus[] = { | |
5cc8767d LX |
1987 | { "SMP", ms->smp.cpus }, |
1988 | { "hotpluggable", ms->smp.max_cpus }, | |
670436ce AJ |
1989 | { NULL, } |
1990 | }, *nc = num_cpus; | |
1991 | int soft_vcpus_limit, hard_vcpus_limit; | |
05330448 | 1992 | KVMState *s; |
94a8d39a | 1993 | const KVMCapabilityInfo *missing_cap; |
05330448 | 1994 | int ret; |
7bbda04c | 1995 | int type = 0; |
135a129a | 1996 | const char *kvm_type; |
494cd11d | 1997 | uint64_t dirty_log_manual_caps; |
05330448 | 1998 | |
fc02086b | 1999 | s = KVM_STATE(ms->accelerator); |
05330448 | 2000 | |
3145fcb6 DG |
2001 | /* |
2002 | * On systems where the kernel can support different base page | |
2003 | * sizes, host page size may be different from TARGET_PAGE_SIZE, | |
2004 | * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum | |
2005 | * page size for the system though. | |
2006 | */ | |
038adc2f | 2007 | assert(TARGET_PAGE_SIZE <= qemu_real_host_page_size); |
3145fcb6 | 2008 | |
aed6efb9 JH |
2009 | s->sigmask_len = 8; |
2010 | ||
e22a25c9 | 2011 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
72cf2d4f | 2012 | QTAILQ_INIT(&s->kvm_sw_breakpoints); |
e22a25c9 | 2013 | #endif |
4c055ab5 | 2014 | QLIST_INIT(&s->kvm_parked_vcpus); |
05330448 | 2015 | s->vmfd = -1; |
448058aa | 2016 | s->fd = qemu_open_old("/dev/kvm", O_RDWR); |
05330448 AL |
2017 | if (s->fd == -1) { |
2018 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); | |
2019 | ret = -errno; | |
2020 | goto err; | |
2021 | } | |
2022 | ||
2023 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); | |
2024 | if (ret < KVM_API_VERSION) { | |
0e1dac6c | 2025 | if (ret >= 0) { |
05330448 | 2026 | ret = -EINVAL; |
a426e122 | 2027 | } |
05330448 AL |
2028 | fprintf(stderr, "kvm version too old\n"); |
2029 | goto err; | |
2030 | } | |
2031 | ||
2032 | if (ret > KVM_API_VERSION) { | |
2033 | ret = -EINVAL; | |
2034 | fprintf(stderr, "kvm version not supported\n"); | |
2035 | goto err; | |
2036 | } | |
2037 | ||
cf0f7cf9 | 2038 | kvm_immediate_exit = kvm_check_extension(s, KVM_CAP_IMMEDIATE_EXIT); |
fb541ca5 AW |
2039 | s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS); |
2040 | ||
2041 | /* If unspecified, use the default value */ | |
2042 | if (!s->nr_slots) { | |
2043 | s->nr_slots = 32; | |
2044 | } | |
2045 | ||
8072aae3 AK |
2046 | s->nr_as = kvm_check_extension(s, KVM_CAP_MULTI_ADDRESS_SPACE); |
2047 | if (s->nr_as <= 1) { | |
2048 | s->nr_as = 1; | |
2049 | } | |
2050 | s->as = g_new0(struct KVMAs, s->nr_as); | |
2051 | ||
135a129a | 2052 | kvm_type = qemu_opt_get(qemu_get_machine_opts(), "kvm-type"); |
f1e29879 | 2053 | if (mc->kvm_type) { |
dc0ca80e | 2054 | type = mc->kvm_type(ms, kvm_type); |
135a129a | 2055 | } else if (kvm_type) { |
0e1dac6c | 2056 | ret = -EINVAL; |
135a129a AK |
2057 | fprintf(stderr, "Invalid argument kvm-type=%s\n", kvm_type); |
2058 | goto err; | |
2059 | } | |
2060 | ||
94ccff13 | 2061 | do { |
135a129a | 2062 | ret = kvm_ioctl(s, KVM_CREATE_VM, type); |
94ccff13 TK |
2063 | } while (ret == -EINTR); |
2064 | ||
2065 | if (ret < 0) { | |
521f438e | 2066 | fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret, |
94ccff13 TK |
2067 | strerror(-ret)); |
2068 | ||
0104dcac | 2069 | #ifdef TARGET_S390X |
2c80e996 CH |
2070 | if (ret == -EINVAL) { |
2071 | fprintf(stderr, | |
2072 | "Host kernel setup problem detected. Please verify:\n"); | |
2073 | fprintf(stderr, "- for kernels supporting the switch_amode or" | |
2074 | " user_mode parameters, whether\n"); | |
2075 | fprintf(stderr, | |
2076 | " user space is running in primary address space\n"); | |
2077 | fprintf(stderr, | |
2078 | "- for kernels supporting the vm.allocate_pgste sysctl, " | |
2079 | "whether it is enabled\n"); | |
2080 | } | |
0104dcac | 2081 | #endif |
05330448 | 2082 | goto err; |
0104dcac | 2083 | } |
05330448 | 2084 | |
94ccff13 | 2085 | s->vmfd = ret; |
11748ba7 GK |
2086 | |
2087 | /* check the vcpu limits */ | |
2088 | soft_vcpus_limit = kvm_recommended_vcpus(s); | |
2089 | hard_vcpus_limit = kvm_max_vcpus(s); | |
2090 | ||
2091 | while (nc->name) { | |
2092 | if (nc->num > soft_vcpus_limit) { | |
2093 | warn_report("Number of %s cpus requested (%d) exceeds " | |
2094 | "the recommended cpus supported by KVM (%d)", | |
2095 | nc->name, nc->num, soft_vcpus_limit); | |
2096 | ||
2097 | if (nc->num > hard_vcpus_limit) { | |
2098 | fprintf(stderr, "Number of %s cpus requested (%d) exceeds " | |
2099 | "the maximum cpus supported by KVM (%d)\n", | |
2100 | nc->name, nc->num, hard_vcpus_limit); | |
2101 | exit(1); | |
2102 | } | |
2103 | } | |
2104 | nc++; | |
2105 | } | |
2106 | ||
94a8d39a JK |
2107 | missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); |
2108 | if (!missing_cap) { | |
2109 | missing_cap = | |
2110 | kvm_check_extension_list(s, kvm_arch_required_capabilities); | |
05330448 | 2111 | } |
94a8d39a | 2112 | if (missing_cap) { |
ad7b8b33 | 2113 | ret = -EINVAL; |
94a8d39a JK |
2114 | fprintf(stderr, "kvm does not support %s\n%s", |
2115 | missing_cap->name, upgrade_note); | |
d85dc283 AL |
2116 | goto err; |
2117 | } | |
2118 | ||
ad7b8b33 | 2119 | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
e6d34aee PH |
2120 | s->coalesced_pio = s->coalesced_mmio && |
2121 | kvm_check_extension(s, KVM_CAP_COALESCED_PIO); | |
f65ed4c1 | 2122 | |
494cd11d | 2123 | dirty_log_manual_caps = |
ff4aa114 | 2124 | kvm_check_extension(s, KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2); |
494cd11d JZ |
2125 | dirty_log_manual_caps &= (KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE | |
2126 | KVM_DIRTY_LOG_INITIALLY_SET); | |
2127 | s->manual_dirty_log_protect = dirty_log_manual_caps; | |
2128 | if (dirty_log_manual_caps) { | |
2129 | ret = kvm_vm_enable_cap(s, KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2, 0, | |
2130 | dirty_log_manual_caps); | |
ff4aa114 | 2131 | if (ret) { |
494cd11d JZ |
2132 | warn_report("Trying to enable capability %"PRIu64" of " |
2133 | "KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 but failed. " | |
2134 | "Falling back to the legacy mode. ", | |
2135 | dirty_log_manual_caps); | |
2136 | s->manual_dirty_log_protect = 0; | |
ff4aa114 PX |
2137 | } |
2138 | } | |
2139 | ||
a0fb002c JK |
2140 | #ifdef KVM_CAP_VCPU_EVENTS |
2141 | s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); | |
2142 | #endif | |
2143 | ||
b0b1d690 JK |
2144 | s->robust_singlestep = |
2145 | kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); | |
b0b1d690 | 2146 | |
ff44f1a3 JK |
2147 | #ifdef KVM_CAP_DEBUGREGS |
2148 | s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); | |
2149 | #endif | |
2150 | ||
ebbfef2f LA |
2151 | s->max_nested_state_len = kvm_check_extension(s, KVM_CAP_NESTED_STATE); |
2152 | ||
d3d3bef0 | 2153 | #ifdef KVM_CAP_IRQ_ROUTING |
50bf31b9 | 2154 | kvm_direct_msi_allowed = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0); |
d3d3bef0 | 2155 | #endif |
4a3adebb | 2156 | |
3ab73842 JK |
2157 | s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3); |
2158 | ||
e333cd69 | 2159 | s->irq_set_ioctl = KVM_IRQ_LINE; |
8732fbd2 | 2160 | if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) { |
e333cd69 | 2161 | s->irq_set_ioctl = KVM_IRQ_LINE_STATUS; |
8732fbd2 PM |
2162 | } |
2163 | ||
df9c8b75 JJ |
2164 | kvm_readonly_mem_allowed = |
2165 | (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0); | |
df9c8b75 | 2166 | |
69e03ae6 NN |
2167 | kvm_eventfds_allowed = |
2168 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0); | |
2169 | ||
f41389ae EA |
2170 | kvm_irqfds_allowed = |
2171 | (kvm_check_extension(s, KVM_CAP_IRQFD) > 0); | |
2172 | ||
2173 | kvm_resamplefds_allowed = | |
2174 | (kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0); | |
2175 | ||
d0a073a1 DD |
2176 | kvm_vm_attributes_allowed = |
2177 | (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0); | |
2178 | ||
35108223 JW |
2179 | kvm_ioeventfd_any_length_allowed = |
2180 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD_ANY_LENGTH) > 0); | |
2181 | ||
d870cfde GA |
2182 | kvm_state = s; |
2183 | ||
b20e3780 BS |
2184 | /* |
2185 | * if memory encryption object is specified then initialize the memory | |
2186 | * encryption context. | |
2187 | */ | |
2188 | if (ms->memory_encryption) { | |
2189 | kvm_state->memcrypt_handle = sev_guest_init(ms->memory_encryption); | |
2190 | if (!kvm_state->memcrypt_handle) { | |
2191 | ret = -1; | |
2192 | goto err; | |
2193 | } | |
54e89539 BS |
2194 | |
2195 | kvm_state->memcrypt_encrypt_data = sev_encrypt_data; | |
b20e3780 BS |
2196 | } |
2197 | ||
b16565b3 | 2198 | ret = kvm_arch_init(ms, s); |
a426e122 | 2199 | if (ret < 0) { |
05330448 | 2200 | goto err; |
a426e122 | 2201 | } |
05330448 | 2202 | |
d1972be1 XL |
2203 | if (s->kernel_irqchip_split == ON_OFF_AUTO_AUTO) { |
2204 | s->kernel_irqchip_split = mc->default_kernel_irqchip_split ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF; | |
2205 | } | |
2206 | ||
6b552b9b DG |
2207 | qemu_register_reset(kvm_unpoison_all, NULL); |
2208 | ||
11bc4a13 | 2209 | if (s->kernel_irqchip_allowed) { |
4376c40d | 2210 | kvm_irqchip_create(s); |
84b058d7 JK |
2211 | } |
2212 | ||
8c56c1a5 PF |
2213 | if (kvm_eventfds_allowed) { |
2214 | s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add; | |
2215 | s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del; | |
2216 | } | |
e6d34aee PH |
2217 | s->memory_listener.listener.coalesced_io_add = kvm_coalesce_mmio_region; |
2218 | s->memory_listener.listener.coalesced_io_del = kvm_uncoalesce_mmio_region; | |
7bbda04c PB |
2219 | |
2220 | kvm_memory_listener_register(s, &s->memory_listener, | |
38bfe691 | 2221 | &address_space_memory, 0); |
7bbda04c PB |
2222 | memory_listener_register(&kvm_io_listener, |
2223 | &address_space_io); | |
e6d34aee PH |
2224 | memory_listener_register(&kvm_coalesced_pio_listener, |
2225 | &address_space_io); | |
05330448 | 2226 | |
d2f2b8a7 SH |
2227 | s->many_ioeventfds = kvm_check_many_ioeventfds(); |
2228 | ||
62dd4eda | 2229 | s->sync_mmu = !!kvm_vm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); |
f5948942 | 2230 | if (!s->sync_mmu) { |
956b109f DH |
2231 | ret = ram_block_discard_disable(true); |
2232 | assert(!ret); | |
f5948942 | 2233 | } |
62dd4eda | 2234 | |
05330448 AL |
2235 | return 0; |
2236 | ||
2237 | err: | |
0e1dac6c | 2238 | assert(ret < 0); |
6d1cc321 SW |
2239 | if (s->vmfd >= 0) { |
2240 | close(s->vmfd); | |
2241 | } | |
2242 | if (s->fd != -1) { | |
2243 | close(s->fd); | |
05330448 | 2244 | } |
7bbda04c | 2245 | g_free(s->memory_listener.slots); |
05330448 AL |
2246 | |
2247 | return ret; | |
2248 | } | |
2249 | ||
aed6efb9 JH |
2250 | void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len) |
2251 | { | |
2252 | s->sigmask_len = sigmask_len; | |
2253 | } | |
2254 | ||
4c663752 PB |
2255 | static void kvm_handle_io(uint16_t port, MemTxAttrs attrs, void *data, int direction, |
2256 | int size, uint32_t count) | |
05330448 AL |
2257 | { |
2258 | int i; | |
2259 | uint8_t *ptr = data; | |
2260 | ||
2261 | for (i = 0; i < count; i++) { | |
4c663752 | 2262 | address_space_rw(&address_space_io, port, attrs, |
5c9eb028 | 2263 | ptr, size, |
354678c5 | 2264 | direction == KVM_EXIT_IO_OUT); |
05330448 AL |
2265 | ptr += size; |
2266 | } | |
05330448 AL |
2267 | } |
2268 | ||
5326ab55 | 2269 | static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run) |
7c80eef8 | 2270 | { |
977c7b6d RK |
2271 | fprintf(stderr, "KVM internal error. Suberror: %d\n", |
2272 | run->internal.suberror); | |
2273 | ||
7c80eef8 MT |
2274 | if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) { |
2275 | int i; | |
2276 | ||
7c80eef8 MT |
2277 | for (i = 0; i < run->internal.ndata; ++i) { |
2278 | fprintf(stderr, "extra data[%d]: %"PRIx64"\n", | |
2279 | i, (uint64_t)run->internal.data[i]); | |
2280 | } | |
2281 | } | |
7c80eef8 MT |
2282 | if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) { |
2283 | fprintf(stderr, "emulation failure\n"); | |
20d695a9 | 2284 | if (!kvm_arch_stop_on_emulation_error(cpu)) { |
90c84c56 | 2285 | cpu_dump_state(cpu, stderr, CPU_DUMP_CODE); |
d73cd8f4 | 2286 | return EXCP_INTERRUPT; |
a426e122 | 2287 | } |
7c80eef8 MT |
2288 | } |
2289 | /* FIXME: Should trigger a qmp message to let management know | |
2290 | * something went wrong. | |
2291 | */ | |
73aaec4a | 2292 | return -1; |
7c80eef8 | 2293 | } |
7c80eef8 | 2294 | |
62a2744c | 2295 | void kvm_flush_coalesced_mmio_buffer(void) |
f65ed4c1 | 2296 | { |
f65ed4c1 | 2297 | KVMState *s = kvm_state; |
1cae88b9 AK |
2298 | |
2299 | if (s->coalesced_flush_in_progress) { | |
2300 | return; | |
2301 | } | |
2302 | ||
2303 | s->coalesced_flush_in_progress = true; | |
2304 | ||
62a2744c SY |
2305 | if (s->coalesced_mmio_ring) { |
2306 | struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring; | |
f65ed4c1 AL |
2307 | while (ring->first != ring->last) { |
2308 | struct kvm_coalesced_mmio *ent; | |
2309 | ||
2310 | ent = &ring->coalesced_mmio[ring->first]; | |
2311 | ||
e6d34aee | 2312 | if (ent->pio == 1) { |
19f70347 PM |
2313 | address_space_write(&address_space_io, ent->phys_addr, |
2314 | MEMTXATTRS_UNSPECIFIED, ent->data, | |
2315 | ent->len); | |
e6d34aee PH |
2316 | } else { |
2317 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); | |
2318 | } | |
85199474 | 2319 | smp_wmb(); |
f65ed4c1 AL |
2320 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; |
2321 | } | |
2322 | } | |
1cae88b9 AK |
2323 | |
2324 | s->coalesced_flush_in_progress = false; | |
f65ed4c1 AL |
2325 | } |
2326 | ||
14e6fe12 | 2327 | static void do_kvm_cpu_synchronize_state(CPUState *cpu, run_on_cpu_data arg) |
4c0960c0 | 2328 | { |
99f31832 | 2329 | if (!cpu->vcpu_dirty) { |
20d695a9 | 2330 | kvm_arch_get_registers(cpu); |
99f31832 | 2331 | cpu->vcpu_dirty = true; |
4c0960c0 AK |
2332 | } |
2333 | } | |
2334 | ||
dd1750d7 | 2335 | void kvm_cpu_synchronize_state(CPUState *cpu) |
2705d56a | 2336 | { |
99f31832 | 2337 | if (!cpu->vcpu_dirty) { |
14e6fe12 | 2338 | run_on_cpu(cpu, do_kvm_cpu_synchronize_state, RUN_ON_CPU_NULL); |
a426e122 | 2339 | } |
2705d56a JK |
2340 | } |
2341 | ||
14e6fe12 | 2342 | static void do_kvm_cpu_synchronize_post_reset(CPUState *cpu, run_on_cpu_data arg) |
ea375f9a | 2343 | { |
20d695a9 | 2344 | kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE); |
99f31832 | 2345 | cpu->vcpu_dirty = false; |
ea375f9a JK |
2346 | } |
2347 | ||
c8e2085d DH |
2348 | void kvm_cpu_synchronize_post_reset(CPUState *cpu) |
2349 | { | |
14e6fe12 | 2350 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_reset, RUN_ON_CPU_NULL); |
c8e2085d DH |
2351 | } |
2352 | ||
14e6fe12 | 2353 | static void do_kvm_cpu_synchronize_post_init(CPUState *cpu, run_on_cpu_data arg) |
ea375f9a | 2354 | { |
20d695a9 | 2355 | kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE); |
99f31832 | 2356 | cpu->vcpu_dirty = false; |
ea375f9a JK |
2357 | } |
2358 | ||
c8e2085d DH |
2359 | void kvm_cpu_synchronize_post_init(CPUState *cpu) |
2360 | { | |
14e6fe12 | 2361 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, RUN_ON_CPU_NULL); |
c8e2085d DH |
2362 | } |
2363 | ||
75e972da DG |
2364 | static void do_kvm_cpu_synchronize_pre_loadvm(CPUState *cpu, run_on_cpu_data arg) |
2365 | { | |
99f31832 | 2366 | cpu->vcpu_dirty = true; |
75e972da DG |
2367 | } |
2368 | ||
2369 | void kvm_cpu_synchronize_pre_loadvm(CPUState *cpu) | |
2370 | { | |
2371 | run_on_cpu(cpu, do_kvm_cpu_synchronize_pre_loadvm, RUN_ON_CPU_NULL); | |
2372 | } | |
2373 | ||
2ae41db2 PB |
2374 | #ifdef KVM_HAVE_MCE_INJECTION |
2375 | static __thread void *pending_sigbus_addr; | |
2376 | static __thread int pending_sigbus_code; | |
2377 | static __thread bool have_sigbus_pending; | |
2378 | #endif | |
2379 | ||
cf0f7cf9 PB |
2380 | static void kvm_cpu_kick(CPUState *cpu) |
2381 | { | |
2382 | atomic_set(&cpu->kvm_run->immediate_exit, 1); | |
2383 | } | |
2384 | ||
2385 | static void kvm_cpu_kick_self(void) | |
2386 | { | |
2387 | if (kvm_immediate_exit) { | |
2388 | kvm_cpu_kick(current_cpu); | |
2389 | } else { | |
2390 | qemu_cpu_kick_self(); | |
2391 | } | |
2392 | } | |
2393 | ||
18268b60 PB |
2394 | static void kvm_eat_signals(CPUState *cpu) |
2395 | { | |
2396 | struct timespec ts = { 0, 0 }; | |
2397 | siginfo_t siginfo; | |
2398 | sigset_t waitset; | |
2399 | sigset_t chkset; | |
2400 | int r; | |
2401 | ||
cf0f7cf9 PB |
2402 | if (kvm_immediate_exit) { |
2403 | atomic_set(&cpu->kvm_run->immediate_exit, 0); | |
2404 | /* Write kvm_run->immediate_exit before the cpu->exit_request | |
2405 | * write in kvm_cpu_exec. | |
2406 | */ | |
2407 | smp_wmb(); | |
2408 | return; | |
2409 | } | |
2410 | ||
18268b60 PB |
2411 | sigemptyset(&waitset); |
2412 | sigaddset(&waitset, SIG_IPI); | |
2413 | ||
2414 | do { | |
2415 | r = sigtimedwait(&waitset, &siginfo, &ts); | |
2416 | if (r == -1 && !(errno == EAGAIN || errno == EINTR)) { | |
2417 | perror("sigtimedwait"); | |
2418 | exit(1); | |
2419 | } | |
2420 | ||
2421 | r = sigpending(&chkset); | |
2422 | if (r == -1) { | |
2423 | perror("sigpending"); | |
2424 | exit(1); | |
2425 | } | |
2426 | } while (sigismember(&chkset, SIG_IPI)); | |
2427 | } | |
2428 | ||
1458c363 | 2429 | int kvm_cpu_exec(CPUState *cpu) |
05330448 | 2430 | { |
f7575c96 | 2431 | struct kvm_run *run = cpu->kvm_run; |
7cbb533f | 2432 | int ret, run_ret; |
05330448 | 2433 | |
8c0d577e | 2434 | DPRINTF("kvm_cpu_exec()\n"); |
05330448 | 2435 | |
20d695a9 | 2436 | if (kvm_arch_process_async_events(cpu)) { |
c5c6679d | 2437 | atomic_set(&cpu->exit_request, 0); |
6792a57b | 2438 | return EXCP_HLT; |
9ccfac9e | 2439 | } |
0af691d7 | 2440 | |
4b8523ee | 2441 | qemu_mutex_unlock_iothread(); |
1d78a3c3 | 2442 | cpu_exec_start(cpu); |
4b8523ee | 2443 | |
9ccfac9e | 2444 | do { |
4c663752 PB |
2445 | MemTxAttrs attrs; |
2446 | ||
99f31832 | 2447 | if (cpu->vcpu_dirty) { |
20d695a9 | 2448 | kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE); |
99f31832 | 2449 | cpu->vcpu_dirty = false; |
4c0960c0 AK |
2450 | } |
2451 | ||
20d695a9 | 2452 | kvm_arch_pre_run(cpu, run); |
c5c6679d | 2453 | if (atomic_read(&cpu->exit_request)) { |
9ccfac9e JK |
2454 | DPRINTF("interrupt exit requested\n"); |
2455 | /* | |
2456 | * KVM requires us to reenter the kernel after IO exits to complete | |
2457 | * instruction emulation. This self-signal will ensure that we | |
2458 | * leave ASAP again. | |
2459 | */ | |
cf0f7cf9 | 2460 | kvm_cpu_kick_self(); |
9ccfac9e | 2461 | } |
9ccfac9e | 2462 | |
cf0f7cf9 PB |
2463 | /* Read cpu->exit_request before KVM_RUN reads run->immediate_exit. |
2464 | * Matching barrier in kvm_eat_signals. | |
2465 | */ | |
2466 | smp_rmb(); | |
2467 | ||
1bc22652 | 2468 | run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0); |
9ccfac9e | 2469 | |
4c663752 | 2470 | attrs = kvm_arch_post_run(cpu, run); |
05330448 | 2471 | |
2ae41db2 PB |
2472 | #ifdef KVM_HAVE_MCE_INJECTION |
2473 | if (unlikely(have_sigbus_pending)) { | |
2474 | qemu_mutex_lock_iothread(); | |
2475 | kvm_arch_on_sigbus_vcpu(cpu, pending_sigbus_code, | |
2476 | pending_sigbus_addr); | |
2477 | have_sigbus_pending = false; | |
2478 | qemu_mutex_unlock_iothread(); | |
2479 | } | |
2480 | #endif | |
2481 | ||
7cbb533f | 2482 | if (run_ret < 0) { |
dc77d341 JK |
2483 | if (run_ret == -EINTR || run_ret == -EAGAIN) { |
2484 | DPRINTF("io window exit\n"); | |
18268b60 | 2485 | kvm_eat_signals(cpu); |
d73cd8f4 | 2486 | ret = EXCP_INTERRUPT; |
dc77d341 JK |
2487 | break; |
2488 | } | |
7b011fbc ME |
2489 | fprintf(stderr, "error: kvm run failed %s\n", |
2490 | strerror(-run_ret)); | |
dae02ba5 LV |
2491 | #ifdef TARGET_PPC |
2492 | if (run_ret == -EBUSY) { | |
2493 | fprintf(stderr, | |
2494 | "This is probably because your SMT is enabled.\n" | |
2495 | "VCPU can only run on primary threads with all " | |
2496 | "secondary threads offline.\n"); | |
2497 | } | |
2498 | #endif | |
a85e130e PB |
2499 | ret = -1; |
2500 | break; | |
05330448 AL |
2501 | } |
2502 | ||
b76ac80a | 2503 | trace_kvm_run_exit(cpu->cpu_index, run->exit_reason); |
05330448 AL |
2504 | switch (run->exit_reason) { |
2505 | case KVM_EXIT_IO: | |
8c0d577e | 2506 | DPRINTF("handle_io\n"); |
80b7d2ef | 2507 | /* Called outside BQL */ |
4c663752 | 2508 | kvm_handle_io(run->io.port, attrs, |
b30e93e9 JK |
2509 | (uint8_t *)run + run->io.data_offset, |
2510 | run->io.direction, | |
2511 | run->io.size, | |
2512 | run->io.count); | |
d73cd8f4 | 2513 | ret = 0; |
05330448 AL |
2514 | break; |
2515 | case KVM_EXIT_MMIO: | |
8c0d577e | 2516 | DPRINTF("handle_mmio\n"); |
de7ea885 | 2517 | /* Called outside BQL */ |
4c663752 PB |
2518 | address_space_rw(&address_space_memory, |
2519 | run->mmio.phys_addr, attrs, | |
2520 | run->mmio.data, | |
2521 | run->mmio.len, | |
2522 | run->mmio.is_write); | |
d73cd8f4 | 2523 | ret = 0; |
05330448 AL |
2524 | break; |
2525 | case KVM_EXIT_IRQ_WINDOW_OPEN: | |
8c0d577e | 2526 | DPRINTF("irq_window_open\n"); |
d73cd8f4 | 2527 | ret = EXCP_INTERRUPT; |
05330448 AL |
2528 | break; |
2529 | case KVM_EXIT_SHUTDOWN: | |
8c0d577e | 2530 | DPRINTF("shutdown\n"); |
cf83f140 | 2531 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
d73cd8f4 | 2532 | ret = EXCP_INTERRUPT; |
05330448 AL |
2533 | break; |
2534 | case KVM_EXIT_UNKNOWN: | |
bb44e0d1 JK |
2535 | fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", |
2536 | (uint64_t)run->hw.hardware_exit_reason); | |
73aaec4a | 2537 | ret = -1; |
05330448 | 2538 | break; |
7c80eef8 | 2539 | case KVM_EXIT_INTERNAL_ERROR: |
5326ab55 | 2540 | ret = kvm_handle_internal_error(cpu, run); |
7c80eef8 | 2541 | break; |
99040447 PS |
2542 | case KVM_EXIT_SYSTEM_EVENT: |
2543 | switch (run->system_event.type) { | |
2544 | case KVM_SYSTEM_EVENT_SHUTDOWN: | |
cf83f140 | 2545 | qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); |
99040447 PS |
2546 | ret = EXCP_INTERRUPT; |
2547 | break; | |
2548 | case KVM_SYSTEM_EVENT_RESET: | |
cf83f140 | 2549 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
99040447 PS |
2550 | ret = EXCP_INTERRUPT; |
2551 | break; | |
7c207b90 | 2552 | case KVM_SYSTEM_EVENT_CRASH: |
d187e08d | 2553 | kvm_cpu_synchronize_state(cpu); |
7c207b90 | 2554 | qemu_mutex_lock_iothread(); |
c86f106b | 2555 | qemu_system_guest_panicked(cpu_get_crash_info(cpu)); |
7c207b90 AS |
2556 | qemu_mutex_unlock_iothread(); |
2557 | ret = 0; | |
2558 | break; | |
99040447 PS |
2559 | default: |
2560 | DPRINTF("kvm_arch_handle_exit\n"); | |
2561 | ret = kvm_arch_handle_exit(cpu, run); | |
2562 | break; | |
2563 | } | |
2564 | break; | |
05330448 | 2565 | default: |
8c0d577e | 2566 | DPRINTF("kvm_arch_handle_exit\n"); |
20d695a9 | 2567 | ret = kvm_arch_handle_exit(cpu, run); |
05330448 AL |
2568 | break; |
2569 | } | |
d73cd8f4 | 2570 | } while (ret == 0); |
05330448 | 2571 | |
1d78a3c3 | 2572 | cpu_exec_end(cpu); |
4b8523ee JK |
2573 | qemu_mutex_lock_iothread(); |
2574 | ||
73aaec4a | 2575 | if (ret < 0) { |
90c84c56 | 2576 | cpu_dump_state(cpu, stderr, CPU_DUMP_CODE); |
0461d5a6 | 2577 | vm_stop(RUN_STATE_INTERNAL_ERROR); |
becfc390 AL |
2578 | } |
2579 | ||
c5c6679d | 2580 | atomic_set(&cpu->exit_request, 0); |
05330448 AL |
2581 | return ret; |
2582 | } | |
2583 | ||
984b5181 | 2584 | int kvm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
2585 | { |
2586 | int ret; | |
984b5181 AL |
2587 | void *arg; |
2588 | va_list ap; | |
05330448 | 2589 | |
984b5181 AL |
2590 | va_start(ap, type); |
2591 | arg = va_arg(ap, void *); | |
2592 | va_end(ap); | |
2593 | ||
9c775729 | 2594 | trace_kvm_ioctl(type, arg); |
984b5181 | 2595 | ret = ioctl(s->fd, type, arg); |
a426e122 | 2596 | if (ret == -1) { |
05330448 | 2597 | ret = -errno; |
a426e122 | 2598 | } |
05330448 AL |
2599 | return ret; |
2600 | } | |
2601 | ||
984b5181 | 2602 | int kvm_vm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
2603 | { |
2604 | int ret; | |
984b5181 AL |
2605 | void *arg; |
2606 | va_list ap; | |
2607 | ||
2608 | va_start(ap, type); | |
2609 | arg = va_arg(ap, void *); | |
2610 | va_end(ap); | |
05330448 | 2611 | |
9c775729 | 2612 | trace_kvm_vm_ioctl(type, arg); |
984b5181 | 2613 | ret = ioctl(s->vmfd, type, arg); |
a426e122 | 2614 | if (ret == -1) { |
05330448 | 2615 | ret = -errno; |
a426e122 | 2616 | } |
05330448 AL |
2617 | return ret; |
2618 | } | |
2619 | ||
1bc22652 | 2620 | int kvm_vcpu_ioctl(CPUState *cpu, int type, ...) |
05330448 AL |
2621 | { |
2622 | int ret; | |
984b5181 AL |
2623 | void *arg; |
2624 | va_list ap; | |
2625 | ||
2626 | va_start(ap, type); | |
2627 | arg = va_arg(ap, void *); | |
2628 | va_end(ap); | |
05330448 | 2629 | |
9c775729 | 2630 | trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg); |
8737c51c | 2631 | ret = ioctl(cpu->kvm_fd, type, arg); |
a426e122 | 2632 | if (ret == -1) { |
05330448 | 2633 | ret = -errno; |
a426e122 | 2634 | } |
05330448 AL |
2635 | return ret; |
2636 | } | |
bd322087 | 2637 | |
0a6a7cca CD |
2638 | int kvm_device_ioctl(int fd, int type, ...) |
2639 | { | |
2640 | int ret; | |
2641 | void *arg; | |
2642 | va_list ap; | |
2643 | ||
2644 | va_start(ap, type); | |
2645 | arg = va_arg(ap, void *); | |
2646 | va_end(ap); | |
2647 | ||
2648 | trace_kvm_device_ioctl(fd, type, arg); | |
2649 | ret = ioctl(fd, type, arg); | |
2650 | if (ret == -1) { | |
2651 | ret = -errno; | |
2652 | } | |
2653 | return ret; | |
2654 | } | |
2655 | ||
d0a073a1 DD |
2656 | int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr) |
2657 | { | |
2658 | int ret; | |
2659 | struct kvm_device_attr attribute = { | |
2660 | .group = group, | |
2661 | .attr = attr, | |
2662 | }; | |
2663 | ||
2664 | if (!kvm_vm_attributes_allowed) { | |
2665 | return 0; | |
2666 | } | |
2667 | ||
2668 | ret = kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attribute); | |
2669 | /* kvm returns 0 on success for HAS_DEVICE_ATTR */ | |
2670 | return ret ? 0 : 1; | |
2671 | } | |
2672 | ||
4b3cfe72 PF |
2673 | int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr) |
2674 | { | |
2675 | struct kvm_device_attr attribute = { | |
2676 | .group = group, | |
2677 | .attr = attr, | |
2678 | .flags = 0, | |
2679 | }; | |
2680 | ||
2681 | return kvm_device_ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute) ? 0 : 1; | |
2682 | } | |
2683 | ||
556969e9 EA |
2684 | int kvm_device_access(int fd, int group, uint64_t attr, |
2685 | void *val, bool write, Error **errp) | |
4b3cfe72 PF |
2686 | { |
2687 | struct kvm_device_attr kvmattr; | |
2688 | int err; | |
2689 | ||
2690 | kvmattr.flags = 0; | |
2691 | kvmattr.group = group; | |
2692 | kvmattr.attr = attr; | |
2693 | kvmattr.addr = (uintptr_t)val; | |
2694 | ||
2695 | err = kvm_device_ioctl(fd, | |
2696 | write ? KVM_SET_DEVICE_ATTR : KVM_GET_DEVICE_ATTR, | |
2697 | &kvmattr); | |
2698 | if (err < 0) { | |
556969e9 EA |
2699 | error_setg_errno(errp, -err, |
2700 | "KVM_%s_DEVICE_ATTR failed: Group %d " | |
2701 | "attr 0x%016" PRIx64, | |
2702 | write ? "SET" : "GET", group, attr); | |
4b3cfe72 | 2703 | } |
556969e9 | 2704 | return err; |
4b3cfe72 PF |
2705 | } |
2706 | ||
62dd4eda | 2707 | bool kvm_has_sync_mmu(void) |
bd322087 | 2708 | { |
62dd4eda | 2709 | return kvm_state->sync_mmu; |
bd322087 | 2710 | } |
e22a25c9 | 2711 | |
a0fb002c JK |
2712 | int kvm_has_vcpu_events(void) |
2713 | { | |
2714 | return kvm_state->vcpu_events; | |
2715 | } | |
2716 | ||
b0b1d690 JK |
2717 | int kvm_has_robust_singlestep(void) |
2718 | { | |
2719 | return kvm_state->robust_singlestep; | |
2720 | } | |
2721 | ||
ff44f1a3 JK |
2722 | int kvm_has_debugregs(void) |
2723 | { | |
2724 | return kvm_state->debugregs; | |
2725 | } | |
2726 | ||
ebbfef2f LA |
2727 | int kvm_max_nested_state_length(void) |
2728 | { | |
2729 | return kvm_state->max_nested_state_len; | |
2730 | } | |
2731 | ||
d2f2b8a7 SH |
2732 | int kvm_has_many_ioeventfds(void) |
2733 | { | |
2734 | if (!kvm_enabled()) { | |
2735 | return 0; | |
2736 | } | |
2737 | return kvm_state->many_ioeventfds; | |
2738 | } | |
2739 | ||
84b058d7 JK |
2740 | int kvm_has_gsi_routing(void) |
2741 | { | |
a9c5eb0d | 2742 | #ifdef KVM_CAP_IRQ_ROUTING |
84b058d7 | 2743 | return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING); |
a9c5eb0d AG |
2744 | #else |
2745 | return false; | |
2746 | #endif | |
84b058d7 JK |
2747 | } |
2748 | ||
3ab73842 JK |
2749 | int kvm_has_intx_set_mask(void) |
2750 | { | |
2751 | return kvm_state->intx_set_mask; | |
2752 | } | |
2753 | ||
5d721b78 AG |
2754 | bool kvm_arm_supports_user_irq(void) |
2755 | { | |
2756 | return kvm_check_extension(kvm_state, KVM_CAP_ARM_USER_IRQ); | |
2757 | } | |
2758 | ||
e22a25c9 | 2759 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
a60f24b5 | 2760 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu, |
e22a25c9 AL |
2761 | target_ulong pc) |
2762 | { | |
2763 | struct kvm_sw_breakpoint *bp; | |
2764 | ||
a60f24b5 | 2765 | QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) { |
a426e122 | 2766 | if (bp->pc == pc) { |
e22a25c9 | 2767 | return bp; |
a426e122 | 2768 | } |
e22a25c9 AL |
2769 | } |
2770 | return NULL; | |
2771 | } | |
2772 | ||
a60f24b5 | 2773 | int kvm_sw_breakpoints_active(CPUState *cpu) |
e22a25c9 | 2774 | { |
a60f24b5 | 2775 | return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints); |
e22a25c9 AL |
2776 | } |
2777 | ||
452e4751 GC |
2778 | struct kvm_set_guest_debug_data { |
2779 | struct kvm_guest_debug dbg; | |
452e4751 GC |
2780 | int err; |
2781 | }; | |
2782 | ||
14e6fe12 | 2783 | static void kvm_invoke_set_guest_debug(CPUState *cpu, run_on_cpu_data data) |
452e4751 | 2784 | { |
14e6fe12 PB |
2785 | struct kvm_set_guest_debug_data *dbg_data = |
2786 | (struct kvm_set_guest_debug_data *) data.host_ptr; | |
b3807725 | 2787 | |
3c0ed2a3 | 2788 | dbg_data->err = kvm_vcpu_ioctl(cpu, KVM_SET_GUEST_DEBUG, |
a60f24b5 | 2789 | &dbg_data->dbg); |
452e4751 GC |
2790 | } |
2791 | ||
38e478ec | 2792 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 | 2793 | { |
452e4751 | 2794 | struct kvm_set_guest_debug_data data; |
e22a25c9 | 2795 | |
b0b1d690 | 2796 | data.dbg.control = reinject_trap; |
e22a25c9 | 2797 | |
ed2803da | 2798 | if (cpu->singlestep_enabled) { |
b0b1d690 JK |
2799 | data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
2800 | } | |
20d695a9 | 2801 | kvm_arch_update_guest_debug(cpu, &data.dbg); |
e22a25c9 | 2802 | |
14e6fe12 PB |
2803 | run_on_cpu(cpu, kvm_invoke_set_guest_debug, |
2804 | RUN_ON_CPU_HOST_PTR(&data)); | |
452e4751 | 2805 | return data.err; |
e22a25c9 AL |
2806 | } |
2807 | ||
62278814 | 2808 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2809 | target_ulong len, int type) |
2810 | { | |
2811 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
2812 | int err; |
2813 | ||
2814 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 2815 | bp = kvm_find_sw_breakpoint(cpu, addr); |
e22a25c9 AL |
2816 | if (bp) { |
2817 | bp->use_count++; | |
2818 | return 0; | |
2819 | } | |
2820 | ||
7267c094 | 2821 | bp = g_malloc(sizeof(struct kvm_sw_breakpoint)); |
e22a25c9 AL |
2822 | bp->pc = addr; |
2823 | bp->use_count = 1; | |
80b7cd73 | 2824 | err = kvm_arch_insert_sw_breakpoint(cpu, bp); |
e22a25c9 | 2825 | if (err) { |
7267c094 | 2826 | g_free(bp); |
e22a25c9 AL |
2827 | return err; |
2828 | } | |
2829 | ||
80b7cd73 | 2830 | QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
e22a25c9 AL |
2831 | } else { |
2832 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); | |
a426e122 | 2833 | if (err) { |
e22a25c9 | 2834 | return err; |
a426e122 | 2835 | } |
e22a25c9 AL |
2836 | } |
2837 | ||
bdc44640 | 2838 | CPU_FOREACH(cpu) { |
38e478ec | 2839 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 2840 | if (err) { |
e22a25c9 | 2841 | return err; |
a426e122 | 2842 | } |
e22a25c9 AL |
2843 | } |
2844 | return 0; | |
2845 | } | |
2846 | ||
62278814 | 2847 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2848 | target_ulong len, int type) |
2849 | { | |
2850 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
2851 | int err; |
2852 | ||
2853 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 2854 | bp = kvm_find_sw_breakpoint(cpu, addr); |
a426e122 | 2855 | if (!bp) { |
e22a25c9 | 2856 | return -ENOENT; |
a426e122 | 2857 | } |
e22a25c9 AL |
2858 | |
2859 | if (bp->use_count > 1) { | |
2860 | bp->use_count--; | |
2861 | return 0; | |
2862 | } | |
2863 | ||
80b7cd73 | 2864 | err = kvm_arch_remove_sw_breakpoint(cpu, bp); |
a426e122 | 2865 | if (err) { |
e22a25c9 | 2866 | return err; |
a426e122 | 2867 | } |
e22a25c9 | 2868 | |
80b7cd73 | 2869 | QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
7267c094 | 2870 | g_free(bp); |
e22a25c9 AL |
2871 | } else { |
2872 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); | |
a426e122 | 2873 | if (err) { |
e22a25c9 | 2874 | return err; |
a426e122 | 2875 | } |
e22a25c9 AL |
2876 | } |
2877 | ||
bdc44640 | 2878 | CPU_FOREACH(cpu) { |
38e478ec | 2879 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 2880 | if (err) { |
e22a25c9 | 2881 | return err; |
a426e122 | 2882 | } |
e22a25c9 AL |
2883 | } |
2884 | return 0; | |
2885 | } | |
2886 | ||
1d5791f4 | 2887 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
2888 | { |
2889 | struct kvm_sw_breakpoint *bp, *next; | |
80b7cd73 | 2890 | KVMState *s = cpu->kvm_state; |
dc54e252 | 2891 | CPUState *tmpcpu; |
e22a25c9 | 2892 | |
72cf2d4f | 2893 | QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
80b7cd73 | 2894 | if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) { |
e22a25c9 | 2895 | /* Try harder to find a CPU that currently sees the breakpoint. */ |
dc54e252 CG |
2896 | CPU_FOREACH(tmpcpu) { |
2897 | if (kvm_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) { | |
e22a25c9 | 2898 | break; |
a426e122 | 2899 | } |
e22a25c9 AL |
2900 | } |
2901 | } | |
78021d6d JK |
2902 | QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry); |
2903 | g_free(bp); | |
e22a25c9 AL |
2904 | } |
2905 | kvm_arch_remove_all_hw_breakpoints(); | |
2906 | ||
bdc44640 | 2907 | CPU_FOREACH(cpu) { |
38e478ec | 2908 | kvm_update_guest_debug(cpu, 0); |
a426e122 | 2909 | } |
e22a25c9 AL |
2910 | } |
2911 | ||
2912 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ | |
2913 | ||
38e478ec | 2914 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 AL |
2915 | { |
2916 | return -EINVAL; | |
2917 | } | |
2918 | ||
62278814 | 2919 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2920 | target_ulong len, int type) |
2921 | { | |
2922 | return -EINVAL; | |
2923 | } | |
2924 | ||
62278814 | 2925 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2926 | target_ulong len, int type) |
2927 | { | |
2928 | return -EINVAL; | |
2929 | } | |
2930 | ||
1d5791f4 | 2931 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
2932 | { |
2933 | } | |
2934 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ | |
cc84de95 | 2935 | |
18268b60 | 2936 | static int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset) |
cc84de95 | 2937 | { |
aed6efb9 | 2938 | KVMState *s = kvm_state; |
cc84de95 MT |
2939 | struct kvm_signal_mask *sigmask; |
2940 | int r; | |
2941 | ||
7267c094 | 2942 | sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset)); |
cc84de95 | 2943 | |
aed6efb9 | 2944 | sigmask->len = s->sigmask_len; |
cc84de95 | 2945 | memcpy(sigmask->sigset, sigset, sizeof(*sigset)); |
1bc22652 | 2946 | r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask); |
7267c094 | 2947 | g_free(sigmask); |
cc84de95 MT |
2948 | |
2949 | return r; | |
2950 | } | |
4d39892c | 2951 | |
cf0f7cf9 | 2952 | static void kvm_ipi_signal(int sig) |
18268b60 | 2953 | { |
cf0f7cf9 PB |
2954 | if (current_cpu) { |
2955 | assert(kvm_immediate_exit); | |
2956 | kvm_cpu_kick(current_cpu); | |
2957 | } | |
18268b60 PB |
2958 | } |
2959 | ||
2960 | void kvm_init_cpu_signals(CPUState *cpu) | |
2961 | { | |
2962 | int r; | |
2963 | sigset_t set; | |
2964 | struct sigaction sigact; | |
2965 | ||
2966 | memset(&sigact, 0, sizeof(sigact)); | |
cf0f7cf9 | 2967 | sigact.sa_handler = kvm_ipi_signal; |
18268b60 PB |
2968 | sigaction(SIG_IPI, &sigact, NULL); |
2969 | ||
2970 | pthread_sigmask(SIG_BLOCK, NULL, &set); | |
2971 | #if defined KVM_HAVE_MCE_INJECTION | |
2972 | sigdelset(&set, SIGBUS); | |
2973 | pthread_sigmask(SIG_SETMASK, &set, NULL); | |
2974 | #endif | |
2975 | sigdelset(&set, SIG_IPI); | |
cf0f7cf9 PB |
2976 | if (kvm_immediate_exit) { |
2977 | r = pthread_sigmask(SIG_SETMASK, &set, NULL); | |
2978 | } else { | |
2979 | r = kvm_set_signal_mask(cpu, &set); | |
2980 | } | |
18268b60 PB |
2981 | if (r) { |
2982 | fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r)); | |
2983 | exit(1); | |
2984 | } | |
2985 | } | |
2986 | ||
2ae41db2 | 2987 | /* Called asynchronously in VCPU thread. */ |
290adf38 | 2988 | int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) |
a1b87fe0 | 2989 | { |
2ae41db2 PB |
2990 | #ifdef KVM_HAVE_MCE_INJECTION |
2991 | if (have_sigbus_pending) { | |
2992 | return 1; | |
2993 | } | |
2994 | have_sigbus_pending = true; | |
2995 | pending_sigbus_addr = addr; | |
2996 | pending_sigbus_code = code; | |
2997 | atomic_set(&cpu->exit_request, 1); | |
2998 | return 0; | |
2999 | #else | |
3000 | return 1; | |
3001 | #endif | |
a1b87fe0 JK |
3002 | } |
3003 | ||
2ae41db2 | 3004 | /* Called synchronously (via signalfd) in main thread. */ |
a1b87fe0 JK |
3005 | int kvm_on_sigbus(int code, void *addr) |
3006 | { | |
2ae41db2 | 3007 | #ifdef KVM_HAVE_MCE_INJECTION |
4d39892c PB |
3008 | /* Action required MCE kills the process if SIGBUS is blocked. Because |
3009 | * that's what happens in the I/O thread, where we handle MCE via signalfd, | |
3010 | * we can only get action optional here. | |
3011 | */ | |
3012 | assert(code != BUS_MCEERR_AR); | |
3013 | kvm_arch_on_sigbus_vcpu(first_cpu, code, addr); | |
3014 | return 0; | |
2ae41db2 PB |
3015 | #else |
3016 | return 1; | |
3017 | #endif | |
a1b87fe0 | 3018 | } |
0a6a7cca CD |
3019 | |
3020 | int kvm_create_device(KVMState *s, uint64_t type, bool test) | |
3021 | { | |
3022 | int ret; | |
3023 | struct kvm_create_device create_dev; | |
3024 | ||
3025 | create_dev.type = type; | |
3026 | create_dev.fd = -1; | |
3027 | create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0; | |
3028 | ||
3029 | if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) { | |
3030 | return -ENOTSUP; | |
3031 | } | |
3032 | ||
3033 | ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev); | |
3034 | if (ret) { | |
3035 | return ret; | |
3036 | } | |
3037 | ||
3038 | return test ? 0 : create_dev.fd; | |
3039 | } | |
ada4135f | 3040 | |
29039acf PX |
3041 | bool kvm_device_supported(int vmfd, uint64_t type) |
3042 | { | |
3043 | struct kvm_create_device create_dev = { | |
3044 | .type = type, | |
3045 | .fd = -1, | |
3046 | .flags = KVM_CREATE_DEVICE_TEST, | |
3047 | }; | |
3048 | ||
3049 | if (ioctl(vmfd, KVM_CHECK_EXTENSION, KVM_CAP_DEVICE_CTRL) <= 0) { | |
3050 | return false; | |
3051 | } | |
3052 | ||
3053 | return (ioctl(vmfd, KVM_CREATE_DEVICE, &create_dev) >= 0); | |
3054 | } | |
3055 | ||
ada4135f CH |
3056 | int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source) |
3057 | { | |
3058 | struct kvm_one_reg reg; | |
3059 | int r; | |
3060 | ||
3061 | reg.id = id; | |
3062 | reg.addr = (uintptr_t) source; | |
3063 | r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); | |
3064 | if (r) { | |
844a3d34 | 3065 | trace_kvm_failed_reg_set(id, strerror(-r)); |
ada4135f CH |
3066 | } |
3067 | return r; | |
3068 | } | |
3069 | ||
3070 | int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target) | |
3071 | { | |
3072 | struct kvm_one_reg reg; | |
3073 | int r; | |
3074 | ||
3075 | reg.id = id; | |
3076 | reg.addr = (uintptr_t) target; | |
3077 | r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); | |
3078 | if (r) { | |
844a3d34 | 3079 | trace_kvm_failed_reg_get(id, strerror(-r)); |
ada4135f CH |
3080 | } |
3081 | return r; | |
3082 | } | |
782c3f29 | 3083 | |
8072aae3 AK |
3084 | static bool kvm_accel_has_memory(MachineState *ms, AddressSpace *as, |
3085 | hwaddr start_addr, hwaddr size) | |
3086 | { | |
3087 | KVMState *kvm = KVM_STATE(ms->accelerator); | |
3088 | int i; | |
3089 | ||
3090 | for (i = 0; i < kvm->nr_as; ++i) { | |
3091 | if (kvm->as[i].as == as && kvm->as[i].ml) { | |
023ae9a8 | 3092 | size = MIN(kvm_max_slot_size, size); |
8072aae3 AK |
3093 | return NULL != kvm_lookup_matching_slot(kvm->as[i].ml, |
3094 | start_addr, size); | |
3095 | } | |
3096 | } | |
3097 | ||
3098 | return false; | |
3099 | } | |
3100 | ||
23b0898e PB |
3101 | static void kvm_get_kvm_shadow_mem(Object *obj, Visitor *v, |
3102 | const char *name, void *opaque, | |
3103 | Error **errp) | |
3104 | { | |
3105 | KVMState *s = KVM_STATE(obj); | |
3106 | int64_t value = s->kvm_shadow_mem; | |
3107 | ||
3108 | visit_type_int(v, name, &value, errp); | |
3109 | } | |
3110 | ||
3111 | static void kvm_set_kvm_shadow_mem(Object *obj, Visitor *v, | |
3112 | const char *name, void *opaque, | |
3113 | Error **errp) | |
3114 | { | |
3115 | KVMState *s = KVM_STATE(obj); | |
23b0898e PB |
3116 | int64_t value; |
3117 | ||
668f62ec | 3118 | if (!visit_type_int(v, name, &value, errp)) { |
23b0898e PB |
3119 | return; |
3120 | } | |
3121 | ||
3122 | s->kvm_shadow_mem = value; | |
3123 | } | |
3124 | ||
11bc4a13 PB |
3125 | static void kvm_set_kernel_irqchip(Object *obj, Visitor *v, |
3126 | const char *name, void *opaque, | |
3127 | Error **errp) | |
3128 | { | |
11bc4a13 PB |
3129 | KVMState *s = KVM_STATE(obj); |
3130 | OnOffSplit mode; | |
3131 | ||
14217038 | 3132 | if (!visit_type_OnOffSplit(v, name, &mode, errp)) { |
11bc4a13 | 3133 | return; |
14217038 MA |
3134 | } |
3135 | switch (mode) { | |
3136 | case ON_OFF_SPLIT_ON: | |
3137 | s->kernel_irqchip_allowed = true; | |
3138 | s->kernel_irqchip_required = true; | |
3139 | s->kernel_irqchip_split = ON_OFF_AUTO_OFF; | |
3140 | break; | |
3141 | case ON_OFF_SPLIT_OFF: | |
3142 | s->kernel_irqchip_allowed = false; | |
3143 | s->kernel_irqchip_required = false; | |
3144 | s->kernel_irqchip_split = ON_OFF_AUTO_OFF; | |
3145 | break; | |
3146 | case ON_OFF_SPLIT_SPLIT: | |
3147 | s->kernel_irqchip_allowed = true; | |
3148 | s->kernel_irqchip_required = true; | |
3149 | s->kernel_irqchip_split = ON_OFF_AUTO_ON; | |
3150 | break; | |
3151 | default: | |
3152 | /* The value was checked in visit_type_OnOffSplit() above. If | |
3153 | * we get here, then something is wrong in QEMU. | |
3154 | */ | |
3155 | abort(); | |
11bc4a13 PB |
3156 | } |
3157 | } | |
3158 | ||
4376c40d PB |
3159 | bool kvm_kernel_irqchip_allowed(void) |
3160 | { | |
11bc4a13 | 3161 | return kvm_state->kernel_irqchip_allowed; |
4376c40d PB |
3162 | } |
3163 | ||
3164 | bool kvm_kernel_irqchip_required(void) | |
3165 | { | |
11bc4a13 | 3166 | return kvm_state->kernel_irqchip_required; |
4376c40d PB |
3167 | } |
3168 | ||
3169 | bool kvm_kernel_irqchip_split(void) | |
3170 | { | |
d1972be1 | 3171 | return kvm_state->kernel_irqchip_split == ON_OFF_AUTO_ON; |
4376c40d PB |
3172 | } |
3173 | ||
23b0898e PB |
3174 | static void kvm_accel_instance_init(Object *obj) |
3175 | { | |
3176 | KVMState *s = KVM_STATE(obj); | |
3177 | ||
3178 | s->kvm_shadow_mem = -1; | |
d1972be1 XL |
3179 | s->kernel_irqchip_allowed = true; |
3180 | s->kernel_irqchip_split = ON_OFF_AUTO_AUTO; | |
23b0898e PB |
3181 | } |
3182 | ||
782c3f29 EH |
3183 | static void kvm_accel_class_init(ObjectClass *oc, void *data) |
3184 | { | |
3185 | AccelClass *ac = ACCEL_CLASS(oc); | |
3186 | ac->name = "KVM"; | |
0d15da8e | 3187 | ac->init_machine = kvm_init; |
8072aae3 | 3188 | ac->has_memory = kvm_accel_has_memory; |
782c3f29 | 3189 | ac->allowed = &kvm_allowed; |
23b0898e | 3190 | |
11bc4a13 PB |
3191 | object_class_property_add(oc, "kernel-irqchip", "on|off|split", |
3192 | NULL, kvm_set_kernel_irqchip, | |
d2623129 | 3193 | NULL, NULL); |
11bc4a13 | 3194 | object_class_property_set_description(oc, "kernel-irqchip", |
7eecec7d | 3195 | "Configure KVM in-kernel irqchip"); |
11bc4a13 | 3196 | |
23b0898e PB |
3197 | object_class_property_add(oc, "kvm-shadow-mem", "int", |
3198 | kvm_get_kvm_shadow_mem, kvm_set_kvm_shadow_mem, | |
d2623129 | 3199 | NULL, NULL); |
23b0898e | 3200 | object_class_property_set_description(oc, "kvm-shadow-mem", |
7eecec7d | 3201 | "KVM shadow MMU size"); |
782c3f29 EH |
3202 | } |
3203 | ||
3204 | static const TypeInfo kvm_accel_type = { | |
3205 | .name = TYPE_KVM_ACCEL, | |
3206 | .parent = TYPE_ACCEL, | |
23b0898e | 3207 | .instance_init = kvm_accel_instance_init, |
782c3f29 | 3208 | .class_init = kvm_accel_class_init, |
fc02086b | 3209 | .instance_size = sizeof(KVMState), |
782c3f29 EH |
3210 | }; |
3211 | ||
3212 | static void kvm_type_init(void) | |
3213 | { | |
3214 | type_register_static(&kvm_accel_type); | |
3215 | } | |
3216 | ||
3217 | type_init(kvm_type_init); |