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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" |
f5948942 | 43 | #include "sysemu/balloon.h" |
23b0898e | 44 | #include "qapi/visitor.h" |
11bc4a13 PB |
45 | #include "qapi/qapi-types-common.h" |
46 | #include "qapi/qapi-visit-common.h" | |
6b552b9b | 47 | #include "sysemu/reset.h" |
05330448 | 48 | |
135a129a AK |
49 | #include "hw/boards.h" |
50 | ||
d2f2b8a7 SH |
51 | /* This check must be after config-host.h is included */ |
52 | #ifdef CONFIG_EVENTFD | |
53 | #include <sys/eventfd.h> | |
54 | #endif | |
55 | ||
bc92e4e9 AJ |
56 | /* KVM uses PAGE_SIZE in its definition of KVM_COALESCED_MMIO_MAX. We |
57 | * need to use the real host PAGE_SIZE, as that's what KVM will use. | |
58 | */ | |
038adc2f | 59 | #define PAGE_SIZE qemu_real_host_page_size |
f65ed4c1 | 60 | |
05330448 AL |
61 | //#define DEBUG_KVM |
62 | ||
63 | #ifdef DEBUG_KVM | |
8c0d577e | 64 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
65 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
66 | #else | |
8c0d577e | 67 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
68 | do { } while (0) |
69 | #endif | |
70 | ||
04fa27f5 JK |
71 | #define KVM_MSI_HASHTAB_SIZE 256 |
72 | ||
4c055ab5 GZ |
73 | struct KVMParkedVcpu { |
74 | unsigned long vcpu_id; | |
75 | int kvm_fd; | |
76 | QLIST_ENTRY(KVMParkedVcpu) node; | |
77 | }; | |
78 | ||
9d1c35df | 79 | struct KVMState |
05330448 | 80 | { |
fc02086b EH |
81 | AccelState parent_obj; |
82 | ||
fb541ca5 | 83 | int nr_slots; |
05330448 AL |
84 | int fd; |
85 | int vmfd; | |
f65ed4c1 | 86 | int coalesced_mmio; |
e6d34aee | 87 | int coalesced_pio; |
62a2744c | 88 | struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; |
1cae88b9 | 89 | bool coalesced_flush_in_progress; |
a0fb002c | 90 | int vcpu_events; |
b0b1d690 | 91 | int robust_singlestep; |
ff44f1a3 | 92 | int debugregs; |
e22a25c9 | 93 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
b58deb34 | 94 | QTAILQ_HEAD(, kvm_sw_breakpoint) kvm_sw_breakpoints; |
e22a25c9 | 95 | #endif |
ebbfef2f | 96 | int max_nested_state_len; |
d2f2b8a7 | 97 | int many_ioeventfds; |
3ab73842 | 98 | int intx_set_mask; |
23b0898e | 99 | int kvm_shadow_mem; |
11bc4a13 PB |
100 | bool kernel_irqchip_allowed; |
101 | bool kernel_irqchip_required; | |
d1972be1 | 102 | OnOffAuto kernel_irqchip_split; |
62dd4eda | 103 | bool sync_mmu; |
ff4aa114 | 104 | bool manual_dirty_log_protect; |
92e4b519 DG |
105 | /* The man page (and posix) say ioctl numbers are signed int, but |
106 | * they're not. Linux, glibc and *BSD all treat ioctl numbers as | |
107 | * unsigned, and treating them as signed here can break things */ | |
e333cd69 | 108 | unsigned irq_set_ioctl; |
aed6efb9 | 109 | unsigned int sigmask_len; |
197e3524 | 110 | GHashTable *gsimap; |
84b058d7 JK |
111 | #ifdef KVM_CAP_IRQ_ROUTING |
112 | struct kvm_irq_routing *irq_routes; | |
113 | int nr_allocated_irq_routes; | |
8269fb70 | 114 | unsigned long *used_gsi_bitmap; |
4e2e4e63 | 115 | unsigned int gsi_count; |
b58deb34 | 116 | QTAILQ_HEAD(, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE]; |
84b058d7 | 117 | #endif |
7bbda04c | 118 | KVMMemoryListener memory_listener; |
4c055ab5 | 119 | QLIST_HEAD(, KVMParkedVcpu) kvm_parked_vcpus; |
b20e3780 BS |
120 | |
121 | /* memory encryption */ | |
122 | void *memcrypt_handle; | |
54e89539 | 123 | int (*memcrypt_encrypt_data)(void *handle, uint8_t *ptr, uint64_t len); |
8072aae3 AK |
124 | |
125 | /* For "info mtree -f" to tell if an MR is registered in KVM */ | |
126 | int nr_as; | |
127 | struct KVMAs { | |
128 | KVMMemoryListener *ml; | |
129 | AddressSpace *as; | |
130 | } *as; | |
9d1c35df | 131 | }; |
05330448 | 132 | |
6a7af8cb | 133 | KVMState *kvm_state; |
3d4b2649 | 134 | bool kvm_kernel_irqchip; |
15eafc2e | 135 | bool kvm_split_irqchip; |
7ae26bd4 | 136 | bool kvm_async_interrupts_allowed; |
215e79c0 | 137 | bool kvm_halt_in_kernel_allowed; |
69e03ae6 | 138 | bool kvm_eventfds_allowed; |
cc7e0ddf | 139 | bool kvm_irqfds_allowed; |
f41389ae | 140 | bool kvm_resamplefds_allowed; |
614e41bc | 141 | bool kvm_msi_via_irqfd_allowed; |
f3e1bed8 | 142 | bool kvm_gsi_routing_allowed; |
76fe21de | 143 | bool kvm_gsi_direct_mapping; |
13eed94e | 144 | bool kvm_allowed; |
df9c8b75 | 145 | bool kvm_readonly_mem_allowed; |
d0a073a1 | 146 | bool kvm_vm_attributes_allowed; |
50bf31b9 | 147 | bool kvm_direct_msi_allowed; |
35108223 | 148 | bool kvm_ioeventfd_any_length_allowed; |
767a554a | 149 | bool kvm_msi_use_devid; |
cf0f7cf9 | 150 | static bool kvm_immediate_exit; |
023ae9a8 | 151 | static hwaddr kvm_max_slot_size = ~0; |
05330448 | 152 | |
94a8d39a JK |
153 | static const KVMCapabilityInfo kvm_required_capabilites[] = { |
154 | KVM_CAP_INFO(USER_MEMORY), | |
155 | KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS), | |
89de4b91 | 156 | KVM_CAP_INFO(JOIN_MEMORY_REGIONS_WORKS), |
94a8d39a JK |
157 | KVM_CAP_LAST_INFO |
158 | }; | |
159 | ||
3607715a DG |
160 | static NotifierList kvm_irqchip_change_notifiers = |
161 | NOTIFIER_LIST_INITIALIZER(kvm_irqchip_change_notifiers); | |
162 | ||
36adac49 PX |
163 | #define kvm_slots_lock(kml) qemu_mutex_lock(&(kml)->slots_lock) |
164 | #define kvm_slots_unlock(kml) qemu_mutex_unlock(&(kml)->slots_lock) | |
165 | ||
44f2e6c1 BR |
166 | int kvm_get_max_memslots(void) |
167 | { | |
4f7f5893 | 168 | KVMState *s = KVM_STATE(current_accel()); |
44f2e6c1 BR |
169 | |
170 | return s->nr_slots; | |
171 | } | |
172 | ||
b20e3780 BS |
173 | bool kvm_memcrypt_enabled(void) |
174 | { | |
175 | if (kvm_state && kvm_state->memcrypt_handle) { | |
176 | return true; | |
177 | } | |
178 | ||
179 | return false; | |
180 | } | |
181 | ||
54e89539 BS |
182 | int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len) |
183 | { | |
184 | if (kvm_state->memcrypt_handle && | |
185 | kvm_state->memcrypt_encrypt_data) { | |
186 | return kvm_state->memcrypt_encrypt_data(kvm_state->memcrypt_handle, | |
187 | ptr, len); | |
188 | } | |
189 | ||
190 | return 1; | |
191 | } | |
192 | ||
36adac49 | 193 | /* Called with KVMMemoryListener.slots_lock held */ |
7bbda04c | 194 | static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml) |
05330448 | 195 | { |
7bbda04c | 196 | KVMState *s = kvm_state; |
05330448 AL |
197 | int i; |
198 | ||
fb541ca5 | 199 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c PB |
200 | if (kml->slots[i].memory_size == 0) { |
201 | return &kml->slots[i]; | |
a426e122 | 202 | } |
05330448 AL |
203 | } |
204 | ||
b8865591 IM |
205 | return NULL; |
206 | } | |
207 | ||
208 | bool kvm_has_free_slot(MachineState *ms) | |
209 | { | |
7bbda04c | 210 | KVMState *s = KVM_STATE(ms->accelerator); |
36adac49 PX |
211 | bool result; |
212 | KVMMemoryListener *kml = &s->memory_listener; | |
213 | ||
214 | kvm_slots_lock(kml); | |
215 | result = !!kvm_get_free_slot(kml); | |
216 | kvm_slots_unlock(kml); | |
7bbda04c | 217 | |
36adac49 | 218 | return result; |
b8865591 IM |
219 | } |
220 | ||
36adac49 | 221 | /* Called with KVMMemoryListener.slots_lock held */ |
7bbda04c | 222 | static KVMSlot *kvm_alloc_slot(KVMMemoryListener *kml) |
b8865591 | 223 | { |
7bbda04c | 224 | KVMSlot *slot = kvm_get_free_slot(kml); |
b8865591 IM |
225 | |
226 | if (slot) { | |
227 | return slot; | |
228 | } | |
229 | ||
d3f8d37f AL |
230 | fprintf(stderr, "%s: no free slot available\n", __func__); |
231 | abort(); | |
232 | } | |
233 | ||
7bbda04c | 234 | static KVMSlot *kvm_lookup_matching_slot(KVMMemoryListener *kml, |
a8170e5e | 235 | hwaddr start_addr, |
2747e716 | 236 | hwaddr size) |
d3f8d37f | 237 | { |
7bbda04c | 238 | KVMState *s = kvm_state; |
d3f8d37f AL |
239 | int i; |
240 | ||
fb541ca5 | 241 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c | 242 | KVMSlot *mem = &kml->slots[i]; |
d3f8d37f | 243 | |
2747e716 | 244 | if (start_addr == mem->start_addr && size == mem->memory_size) { |
d3f8d37f AL |
245 | return mem; |
246 | } | |
247 | } | |
248 | ||
05330448 AL |
249 | return NULL; |
250 | } | |
251 | ||
5ea69c2e DH |
252 | /* |
253 | * Calculate and align the start address and the size of the section. | |
254 | * Return the size. If the size is 0, the aligned section is empty. | |
255 | */ | |
256 | static hwaddr kvm_align_section(MemoryRegionSection *section, | |
257 | hwaddr *start) | |
258 | { | |
259 | hwaddr size = int128_get64(section->size); | |
a6ffc423 | 260 | hwaddr delta, aligned; |
5ea69c2e DH |
261 | |
262 | /* kvm works in page size chunks, but the function may be called | |
263 | with sub-page size and unaligned start address. Pad the start | |
264 | address to next and truncate size to previous page boundary. */ | |
a6ffc423 DH |
265 | aligned = ROUND_UP(section->offset_within_address_space, |
266 | qemu_real_host_page_size); | |
267 | delta = aligned - section->offset_within_address_space; | |
268 | *start = aligned; | |
5ea69c2e DH |
269 | if (delta > size) { |
270 | return 0; | |
271 | } | |
5ea69c2e | 272 | |
a6ffc423 | 273 | return (size - delta) & qemu_real_host_page_mask; |
5ea69c2e DH |
274 | } |
275 | ||
9f213ed9 | 276 | int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, |
a8170e5e | 277 | hwaddr *phys_addr) |
983dfc3b | 278 | { |
7bbda04c | 279 | KVMMemoryListener *kml = &s->memory_listener; |
36adac49 | 280 | int i, ret = 0; |
983dfc3b | 281 | |
36adac49 | 282 | kvm_slots_lock(kml); |
fb541ca5 | 283 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c | 284 | KVMSlot *mem = &kml->slots[i]; |
983dfc3b | 285 | |
9f213ed9 AK |
286 | if (ram >= mem->ram && ram < mem->ram + mem->memory_size) { |
287 | *phys_addr = mem->start_addr + (ram - mem->ram); | |
36adac49 PX |
288 | ret = 1; |
289 | break; | |
983dfc3b HY |
290 | } |
291 | } | |
36adac49 | 292 | kvm_slots_unlock(kml); |
983dfc3b | 293 | |
36adac49 | 294 | return ret; |
983dfc3b HY |
295 | } |
296 | ||
6c090d4a | 297 | static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot, bool new) |
5832d1f2 | 298 | { |
7bbda04c | 299 | KVMState *s = kvm_state; |
5832d1f2 | 300 | struct kvm_userspace_memory_region mem; |
fe29141b | 301 | int ret; |
5832d1f2 | 302 | |
38bfe691 | 303 | mem.slot = slot->slot | (kml->as_id << 16); |
5832d1f2 | 304 | mem.guest_phys_addr = slot->start_addr; |
9f213ed9 | 305 | mem.userspace_addr = (unsigned long)slot->ram; |
5832d1f2 | 306 | mem.flags = slot->flags; |
651eb0f4 | 307 | |
6c090d4a | 308 | if (slot->memory_size && !new && (mem.flags ^ slot->old_flags) & KVM_MEM_READONLY) { |
235e8982 JJ |
309 | /* Set the slot size to 0 before setting the slot to the desired |
310 | * value. This is needed based on KVM commit 75d61fbc. */ | |
311 | mem.memory_size = 0; | |
88cd34ee PMD |
312 | ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); |
313 | if (ret < 0) { | |
314 | goto err; | |
315 | } | |
235e8982 JJ |
316 | } |
317 | mem.memory_size = slot->memory_size; | |
fe29141b | 318 | ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); |
6c090d4a | 319 | slot->old_flags = mem.flags; |
88cd34ee | 320 | err: |
fe29141b AK |
321 | trace_kvm_set_user_memory(mem.slot, mem.flags, mem.guest_phys_addr, |
322 | mem.memory_size, mem.userspace_addr, ret); | |
88cd34ee PMD |
323 | if (ret < 0) { |
324 | error_report("%s: KVM_SET_USER_MEMORY_REGION failed, slot=%d," | |
325 | " start=0x%" PRIx64 ", size=0x%" PRIx64 ": %s", | |
326 | __func__, mem.slot, slot->start_addr, | |
327 | (uint64_t)mem.memory_size, strerror(errno)); | |
328 | } | |
fe29141b | 329 | return ret; |
5832d1f2 AL |
330 | } |
331 | ||
4c055ab5 GZ |
332 | int kvm_destroy_vcpu(CPUState *cpu) |
333 | { | |
334 | KVMState *s = kvm_state; | |
335 | long mmap_size; | |
336 | struct KVMParkedVcpu *vcpu = NULL; | |
337 | int ret = 0; | |
338 | ||
339 | DPRINTF("kvm_destroy_vcpu\n"); | |
340 | ||
b1115c99 LA |
341 | ret = kvm_arch_destroy_vcpu(cpu); |
342 | if (ret < 0) { | |
343 | goto err; | |
344 | } | |
345 | ||
4c055ab5 GZ |
346 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); |
347 | if (mmap_size < 0) { | |
348 | ret = mmap_size; | |
349 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); | |
350 | goto err; | |
351 | } | |
352 | ||
353 | ret = munmap(cpu->kvm_run, mmap_size); | |
354 | if (ret < 0) { | |
355 | goto err; | |
356 | } | |
357 | ||
358 | vcpu = g_malloc0(sizeof(*vcpu)); | |
359 | vcpu->vcpu_id = kvm_arch_vcpu_id(cpu); | |
360 | vcpu->kvm_fd = cpu->kvm_fd; | |
361 | QLIST_INSERT_HEAD(&kvm_state->kvm_parked_vcpus, vcpu, node); | |
362 | err: | |
363 | return ret; | |
364 | } | |
365 | ||
366 | static int kvm_get_vcpu(KVMState *s, unsigned long vcpu_id) | |
367 | { | |
368 | struct KVMParkedVcpu *cpu; | |
369 | ||
370 | QLIST_FOREACH(cpu, &s->kvm_parked_vcpus, node) { | |
371 | if (cpu->vcpu_id == vcpu_id) { | |
372 | int kvm_fd; | |
373 | ||
374 | QLIST_REMOVE(cpu, node); | |
375 | kvm_fd = cpu->kvm_fd; | |
376 | g_free(cpu); | |
377 | return kvm_fd; | |
378 | } | |
379 | } | |
380 | ||
381 | return kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)vcpu_id); | |
382 | } | |
383 | ||
504134d2 | 384 | int kvm_init_vcpu(CPUState *cpu) |
05330448 AL |
385 | { |
386 | KVMState *s = kvm_state; | |
387 | long mmap_size; | |
388 | int ret; | |
389 | ||
8c0d577e | 390 | DPRINTF("kvm_init_vcpu\n"); |
05330448 | 391 | |
4c055ab5 | 392 | ret = kvm_get_vcpu(s, kvm_arch_vcpu_id(cpu)); |
05330448 | 393 | if (ret < 0) { |
8c0d577e | 394 | DPRINTF("kvm_create_vcpu failed\n"); |
05330448 AL |
395 | goto err; |
396 | } | |
397 | ||
8737c51c | 398 | cpu->kvm_fd = ret; |
a60f24b5 | 399 | cpu->kvm_state = s; |
99f31832 | 400 | cpu->vcpu_dirty = true; |
05330448 AL |
401 | |
402 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
403 | if (mmap_size < 0) { | |
748a680b | 404 | ret = mmap_size; |
8c0d577e | 405 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); |
05330448 AL |
406 | goto err; |
407 | } | |
408 | ||
f7575c96 | 409 | cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, |
8737c51c | 410 | cpu->kvm_fd, 0); |
f7575c96 | 411 | if (cpu->kvm_run == MAP_FAILED) { |
05330448 | 412 | ret = -errno; |
8c0d577e | 413 | DPRINTF("mmap'ing vcpu state failed\n"); |
05330448 AL |
414 | goto err; |
415 | } | |
416 | ||
a426e122 JK |
417 | if (s->coalesced_mmio && !s->coalesced_mmio_ring) { |
418 | s->coalesced_mmio_ring = | |
f7575c96 | 419 | (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE; |
a426e122 | 420 | } |
62a2744c | 421 | |
20d695a9 | 422 | ret = kvm_arch_init_vcpu(cpu); |
05330448 AL |
423 | err: |
424 | return ret; | |
425 | } | |
426 | ||
5832d1f2 AL |
427 | /* |
428 | * dirty pages logging control | |
429 | */ | |
25254bbc | 430 | |
d6ff5cbc | 431 | static int kvm_mem_flags(MemoryRegion *mr) |
25254bbc | 432 | { |
d6ff5cbc | 433 | bool readonly = mr->readonly || memory_region_is_romd(mr); |
235e8982 | 434 | int flags = 0; |
d6ff5cbc AJ |
435 | |
436 | if (memory_region_get_dirty_log_mask(mr) != 0) { | |
437 | flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
438 | } | |
235e8982 JJ |
439 | if (readonly && kvm_readonly_mem_allowed) { |
440 | flags |= KVM_MEM_READONLY; | |
441 | } | |
442 | return flags; | |
25254bbc MT |
443 | } |
444 | ||
36adac49 | 445 | /* Called with KVMMemoryListener.slots_lock held */ |
7bbda04c PB |
446 | static int kvm_slot_update_flags(KVMMemoryListener *kml, KVMSlot *mem, |
447 | MemoryRegion *mr) | |
5832d1f2 | 448 | { |
d6ff5cbc | 449 | mem->flags = kvm_mem_flags(mr); |
5832d1f2 | 450 | |
4495d6a7 | 451 | /* If nothing changed effectively, no need to issue ioctl */ |
6c090d4a | 452 | if (mem->flags == mem->old_flags) { |
25254bbc | 453 | return 0; |
4495d6a7 JK |
454 | } |
455 | ||
6c090d4a | 456 | return kvm_set_user_memory_region(kml, mem, false); |
5832d1f2 AL |
457 | } |
458 | ||
7bbda04c PB |
459 | static int kvm_section_update_flags(KVMMemoryListener *kml, |
460 | MemoryRegionSection *section) | |
25254bbc | 461 | { |
023ae9a8 | 462 | hwaddr start_addr, size, slot_size; |
343562e8 | 463 | KVMSlot *mem; |
36adac49 | 464 | int ret = 0; |
25254bbc | 465 | |
343562e8 DH |
466 | size = kvm_align_section(section, &start_addr); |
467 | if (!size) { | |
ea8cb1a8 | 468 | return 0; |
25254bbc | 469 | } |
343562e8 | 470 | |
36adac49 PX |
471 | kvm_slots_lock(kml); |
472 | ||
023ae9a8 IM |
473 | while (size && !ret) { |
474 | slot_size = MIN(kvm_max_slot_size, size); | |
475 | mem = kvm_lookup_matching_slot(kml, start_addr, slot_size); | |
476 | if (!mem) { | |
477 | /* We don't have a slot if we want to trap every access. */ | |
478 | goto out; | |
479 | } | |
343562e8 | 480 | |
023ae9a8 IM |
481 | ret = kvm_slot_update_flags(kml, mem, section->mr); |
482 | start_addr += slot_size; | |
483 | size -= slot_size; | |
484 | } | |
36adac49 PX |
485 | |
486 | out: | |
487 | kvm_slots_unlock(kml); | |
488 | return ret; | |
25254bbc MT |
489 | } |
490 | ||
a01672d3 | 491 | static void kvm_log_start(MemoryListener *listener, |
b2dfd71c PB |
492 | MemoryRegionSection *section, |
493 | int old, int new) | |
5832d1f2 | 494 | { |
7bbda04c | 495 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
496 | int r; |
497 | ||
b2dfd71c PB |
498 | if (old != 0) { |
499 | return; | |
500 | } | |
501 | ||
7bbda04c | 502 | r = kvm_section_update_flags(kml, section); |
a01672d3 AK |
503 | if (r < 0) { |
504 | abort(); | |
505 | } | |
5832d1f2 AL |
506 | } |
507 | ||
a01672d3 | 508 | static void kvm_log_stop(MemoryListener *listener, |
b2dfd71c PB |
509 | MemoryRegionSection *section, |
510 | int old, int new) | |
5832d1f2 | 511 | { |
7bbda04c | 512 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
513 | int r; |
514 | ||
b2dfd71c PB |
515 | if (new != 0) { |
516 | return; | |
517 | } | |
518 | ||
7bbda04c | 519 | r = kvm_section_update_flags(kml, section); |
a01672d3 AK |
520 | if (r < 0) { |
521 | abort(); | |
522 | } | |
5832d1f2 AL |
523 | } |
524 | ||
8369e01c | 525 | /* get kvm's dirty pages bitmap and update qemu's */ |
ffcde12f AK |
526 | static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section, |
527 | unsigned long *bitmap) | |
96c1606b | 528 | { |
8e41fb63 FZ |
529 | ram_addr_t start = section->offset_within_region + |
530 | memory_region_get_ram_addr(section->mr); | |
038adc2f | 531 | ram_addr_t pages = int128_get64(section->size) / qemu_real_host_page_size; |
5ff7fb77 JQ |
532 | |
533 | cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages); | |
8369e01c | 534 | return 0; |
96c1606b AG |
535 | } |
536 | ||
8369e01c MT |
537 | #define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) |
538 | ||
9b3a31c7 DDAG |
539 | /* Allocate the dirty bitmap for a slot */ |
540 | static void kvm_memslot_init_dirty_bitmap(KVMSlot *mem) | |
541 | { | |
542 | /* | |
543 | * XXX bad kernel interface alert | |
544 | * For dirty bitmap, kernel allocates array of size aligned to | |
545 | * bits-per-long. But for case when the kernel is 64bits and | |
546 | * the userspace is 32bits, userspace can't align to the same | |
547 | * bits-per-long, since sizeof(long) is different between kernel | |
548 | * and user space. This way, userspace will provide buffer which | |
549 | * may be 4 bytes less than the kernel will use, resulting in | |
550 | * userspace memory corruption (which is not detectable by valgrind | |
551 | * too, in most cases). | |
552 | * So for now, let's align to 64 instead of HOST_LONG_BITS here, in | |
553 | * a hope that sizeof(long) won't become >8 any time soon. | |
554 | */ | |
555 | hwaddr bitmap_size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), | |
556 | /*HOST_LONG_BITS*/ 64) / 8; | |
557 | mem->dirty_bmap = g_malloc0(bitmap_size); | |
558 | } | |
559 | ||
5832d1f2 | 560 | /** |
4a12a11a | 561 | * kvm_physical_sync_dirty_bitmap - Sync dirty bitmap from kernel space |
5832d1f2 | 562 | * |
4a12a11a PX |
563 | * This function will first try to fetch dirty bitmap from the kernel, |
564 | * and then updates qemu's dirty bitmap. | |
565 | * | |
36adac49 PX |
566 | * NOTE: caller must be with kml->slots_lock held. |
567 | * | |
4a12a11a PX |
568 | * @kml: the KVM memory listener object |
569 | * @section: the memory section to sync the dirty bitmap with | |
5832d1f2 | 570 | */ |
7bbda04c PB |
571 | static int kvm_physical_sync_dirty_bitmap(KVMMemoryListener *kml, |
572 | MemoryRegionSection *section) | |
5832d1f2 AL |
573 | { |
574 | KVMState *s = kvm_state; | |
714f78c5 | 575 | struct kvm_dirty_log d = {}; |
151f7749 | 576 | KVMSlot *mem; |
67548f09 | 577 | hwaddr start_addr, size; |
023ae9a8 | 578 | hwaddr slot_size, slot_offset = 0; |
36adac49 | 579 | int ret = 0; |
67548f09 DH |
580 | |
581 | size = kvm_align_section(section, &start_addr); | |
023ae9a8 IM |
582 | while (size) { |
583 | MemoryRegionSection subsection = *section; | |
584 | ||
585 | slot_size = MIN(kvm_max_slot_size, size); | |
586 | mem = kvm_lookup_matching_slot(kml, start_addr, slot_size); | |
67548f09 | 587 | if (!mem) { |
e377e87c | 588 | /* We don't have a slot if we want to trap every access. */ |
36adac49 | 589 | goto out; |
151f7749 | 590 | } |
5832d1f2 | 591 | |
9f4bf4ba PX |
592 | if (!mem->dirty_bmap) { |
593 | /* Allocate on the first log_sync, once and for all */ | |
9b3a31c7 | 594 | kvm_memslot_init_dirty_bitmap(mem); |
9f4bf4ba | 595 | } |
5832d1f2 | 596 | |
9f4bf4ba | 597 | d.dirty_bitmap = mem->dirty_bmap; |
38bfe691 | 598 | d.slot = mem->slot | (kml->as_id << 16); |
50212d63 | 599 | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { |
8c0d577e | 600 | DPRINTF("ioctl failed %d\n", errno); |
36adac49 PX |
601 | ret = -1; |
602 | goto out; | |
151f7749 | 603 | } |
5832d1f2 | 604 | |
023ae9a8 IM |
605 | subsection.offset_within_region += slot_offset; |
606 | subsection.size = int128_make64(slot_size); | |
607 | kvm_get_dirty_pages_log_range(&subsection, d.dirty_bitmap); | |
608 | ||
609 | slot_offset += slot_size; | |
610 | start_addr += slot_size; | |
611 | size -= slot_size; | |
5832d1f2 | 612 | } |
36adac49 PX |
613 | out: |
614 | return ret; | |
5832d1f2 AL |
615 | } |
616 | ||
ff4aa114 PX |
617 | /* Alignment requirement for KVM_CLEAR_DIRTY_LOG - 64 pages */ |
618 | #define KVM_CLEAR_LOG_SHIFT 6 | |
619 | #define KVM_CLEAR_LOG_ALIGN (qemu_real_host_page_size << KVM_CLEAR_LOG_SHIFT) | |
620 | #define KVM_CLEAR_LOG_MASK (-KVM_CLEAR_LOG_ALIGN) | |
621 | ||
4222147d PB |
622 | static int kvm_log_clear_one_slot(KVMSlot *mem, int as_id, uint64_t start, |
623 | uint64_t size) | |
ff4aa114 PX |
624 | { |
625 | KVMState *s = kvm_state; | |
4222147d | 626 | uint64_t end, bmap_start, start_delta, bmap_npages; |
ff4aa114 | 627 | struct kvm_clear_dirty_log d; |
ff4aa114 | 628 | unsigned long *bmap_clear = NULL, psize = qemu_real_host_page_size; |
4222147d | 629 | int ret; |
ff4aa114 PX |
630 | |
631 | /* | |
632 | * We need to extend either the start or the size or both to | |
633 | * satisfy the KVM interface requirement. Firstly, do the start | |
634 | * page alignment on 64 host pages | |
635 | */ | |
84516e5b PB |
636 | bmap_start = start & KVM_CLEAR_LOG_MASK; |
637 | start_delta = start - bmap_start; | |
ff4aa114 PX |
638 | bmap_start /= psize; |
639 | ||
640 | /* | |
641 | * The kernel interface has restriction on the size too, that either: | |
642 | * | |
643 | * (1) the size is 64 host pages aligned (just like the start), or | |
644 | * (2) the size fills up until the end of the KVM memslot. | |
645 | */ | |
646 | bmap_npages = DIV_ROUND_UP(size + start_delta, KVM_CLEAR_LOG_ALIGN) | |
647 | << KVM_CLEAR_LOG_SHIFT; | |
648 | end = mem->memory_size / psize; | |
649 | if (bmap_npages > end - bmap_start) { | |
650 | bmap_npages = end - bmap_start; | |
651 | } | |
652 | start_delta /= psize; | |
653 | ||
654 | /* | |
655 | * Prepare the bitmap to clear dirty bits. Here we must guarantee | |
656 | * that we won't clear any unknown dirty bits otherwise we might | |
657 | * accidentally clear some set bits which are not yet synced from | |
658 | * the kernel into QEMU's bitmap, then we'll lose track of the | |
659 | * guest modifications upon those pages (which can directly lead | |
660 | * to guest data loss or panic after migration). | |
661 | * | |
662 | * Layout of the KVMSlot.dirty_bmap: | |
663 | * | |
664 | * |<-------- bmap_npages -----------..>| | |
665 | * [1] | |
666 | * start_delta size | |
667 | * |----------------|-------------|------------------|------------| | |
668 | * ^ ^ ^ ^ | |
669 | * | | | | | |
670 | * start bmap_start (start) end | |
671 | * of memslot of memslot | |
672 | * | |
673 | * [1] bmap_npages can be aligned to either 64 pages or the end of slot | |
674 | */ | |
675 | ||
676 | assert(bmap_start % BITS_PER_LONG == 0); | |
677 | /* We should never do log_clear before log_sync */ | |
678 | assert(mem->dirty_bmap); | |
679 | if (start_delta) { | |
680 | /* Slow path - we need to manipulate a temp bitmap */ | |
681 | bmap_clear = bitmap_new(bmap_npages); | |
682 | bitmap_copy_with_src_offset(bmap_clear, mem->dirty_bmap, | |
683 | bmap_start, start_delta + size / psize); | |
684 | /* | |
685 | * We need to fill the holes at start because that was not | |
686 | * specified by the caller and we extended the bitmap only for | |
687 | * 64 pages alignment | |
688 | */ | |
689 | bitmap_clear(bmap_clear, 0, start_delta); | |
690 | d.dirty_bitmap = bmap_clear; | |
691 | } else { | |
692 | /* Fast path - start address aligns well with BITS_PER_LONG */ | |
693 | d.dirty_bitmap = mem->dirty_bmap + BIT_WORD(bmap_start); | |
694 | } | |
695 | ||
696 | d.first_page = bmap_start; | |
697 | /* It should never overflow. If it happens, say something */ | |
698 | assert(bmap_npages <= UINT32_MAX); | |
699 | d.num_pages = bmap_npages; | |
4222147d | 700 | d.slot = mem->slot | (as_id << 16); |
ff4aa114 PX |
701 | |
702 | if (kvm_vm_ioctl(s, KVM_CLEAR_DIRTY_LOG, &d) == -1) { | |
703 | ret = -errno; | |
704 | error_report("%s: KVM_CLEAR_DIRTY_LOG failed, slot=%d, " | |
705 | "start=0x%"PRIx64", size=0x%"PRIx32", errno=%d", | |
706 | __func__, d.slot, (uint64_t)d.first_page, | |
707 | (uint32_t)d.num_pages, ret); | |
708 | } else { | |
709 | ret = 0; | |
710 | trace_kvm_clear_dirty_log(d.slot, d.first_page, d.num_pages); | |
711 | } | |
712 | ||
713 | /* | |
714 | * After we have updated the remote dirty bitmap, we update the | |
715 | * cached bitmap as well for the memslot, then if another user | |
716 | * clears the same region we know we shouldn't clear it again on | |
717 | * the remote otherwise it's data loss as well. | |
718 | */ | |
719 | bitmap_clear(mem->dirty_bmap, bmap_start + start_delta, | |
720 | size / psize); | |
721 | /* This handles the NULL case well */ | |
722 | g_free(bmap_clear); | |
4222147d PB |
723 | return ret; |
724 | } | |
725 | ||
726 | ||
727 | /** | |
728 | * kvm_physical_log_clear - Clear the kernel's dirty bitmap for range | |
729 | * | |
730 | * NOTE: this will be a no-op if we haven't enabled manual dirty log | |
731 | * protection in the host kernel because in that case this operation | |
732 | * will be done within log_sync(). | |
733 | * | |
734 | * @kml: the kvm memory listener | |
735 | * @section: the memory range to clear dirty bitmap | |
736 | */ | |
737 | static int kvm_physical_log_clear(KVMMemoryListener *kml, | |
738 | MemoryRegionSection *section) | |
739 | { | |
740 | KVMState *s = kvm_state; | |
84516e5b PB |
741 | uint64_t start, size, offset, count; |
742 | KVMSlot *mem; | |
87287ac0 | 743 | int ret = 0, i; |
4222147d PB |
744 | |
745 | if (!s->manual_dirty_log_protect) { | |
746 | /* No need to do explicit clear */ | |
87287ac0 | 747 | return ret; |
4222147d PB |
748 | } |
749 | ||
750 | start = section->offset_within_address_space; | |
751 | size = int128_get64(section->size); | |
752 | ||
753 | if (!size) { | |
754 | /* Nothing more we can do... */ | |
87287ac0 | 755 | return ret; |
4222147d PB |
756 | } |
757 | ||
758 | kvm_slots_lock(kml); | |
759 | ||
4222147d PB |
760 | for (i = 0; i < s->nr_slots; i++) { |
761 | mem = &kml->slots[i]; | |
84516e5b PB |
762 | /* Discard slots that are empty or do not overlap the section */ |
763 | if (!mem->memory_size || | |
764 | mem->start_addr > start + size - 1 || | |
765 | start > mem->start_addr + mem->memory_size - 1) { | |
766 | continue; | |
767 | } | |
768 | ||
769 | if (start >= mem->start_addr) { | |
770 | /* The slot starts before section or is aligned to it. */ | |
771 | offset = start - mem->start_addr; | |
772 | count = MIN(mem->memory_size - offset, size); | |
773 | } else { | |
774 | /* The slot starts after section. */ | |
775 | offset = 0; | |
776 | count = MIN(mem->memory_size, size - (mem->start_addr - start)); | |
777 | } | |
778 | ret = kvm_log_clear_one_slot(mem, kml->as_id, offset, count); | |
779 | if (ret < 0) { | |
4222147d PB |
780 | break; |
781 | } | |
782 | } | |
783 | ||
ff4aa114 PX |
784 | kvm_slots_unlock(kml); |
785 | ||
786 | return ret; | |
787 | } | |
788 | ||
95d2994a AK |
789 | static void kvm_coalesce_mmio_region(MemoryListener *listener, |
790 | MemoryRegionSection *secion, | |
a8170e5e | 791 | hwaddr start, hwaddr size) |
f65ed4c1 | 792 | { |
f65ed4c1 AL |
793 | KVMState *s = kvm_state; |
794 | ||
795 | if (s->coalesced_mmio) { | |
796 | struct kvm_coalesced_mmio_zone zone; | |
797 | ||
798 | zone.addr = start; | |
799 | zone.size = size; | |
7e680753 | 800 | zone.pad = 0; |
f65ed4c1 | 801 | |
95d2994a | 802 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 803 | } |
f65ed4c1 AL |
804 | } |
805 | ||
95d2994a AK |
806 | static void kvm_uncoalesce_mmio_region(MemoryListener *listener, |
807 | MemoryRegionSection *secion, | |
a8170e5e | 808 | hwaddr start, hwaddr size) |
f65ed4c1 | 809 | { |
f65ed4c1 AL |
810 | KVMState *s = kvm_state; |
811 | ||
812 | if (s->coalesced_mmio) { | |
813 | struct kvm_coalesced_mmio_zone zone; | |
814 | ||
815 | zone.addr = start; | |
816 | zone.size = size; | |
7e680753 | 817 | zone.pad = 0; |
f65ed4c1 | 818 | |
95d2994a | 819 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 820 | } |
f65ed4c1 AL |
821 | } |
822 | ||
e6d34aee PH |
823 | static void kvm_coalesce_pio_add(MemoryListener *listener, |
824 | MemoryRegionSection *section, | |
825 | hwaddr start, hwaddr size) | |
826 | { | |
827 | KVMState *s = kvm_state; | |
828 | ||
829 | if (s->coalesced_pio) { | |
830 | struct kvm_coalesced_mmio_zone zone; | |
831 | ||
832 | zone.addr = start; | |
833 | zone.size = size; | |
834 | zone.pio = 1; | |
835 | ||
836 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); | |
837 | } | |
838 | } | |
839 | ||
840 | static void kvm_coalesce_pio_del(MemoryListener *listener, | |
841 | MemoryRegionSection *section, | |
842 | hwaddr start, hwaddr size) | |
843 | { | |
844 | KVMState *s = kvm_state; | |
845 | ||
846 | if (s->coalesced_pio) { | |
847 | struct kvm_coalesced_mmio_zone zone; | |
848 | ||
849 | zone.addr = start; | |
850 | zone.size = size; | |
851 | zone.pio = 1; | |
852 | ||
853 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); | |
854 | } | |
855 | } | |
856 | ||
857 | static MemoryListener kvm_coalesced_pio_listener = { | |
858 | .coalesced_io_add = kvm_coalesce_pio_add, | |
859 | .coalesced_io_del = kvm_coalesce_pio_del, | |
860 | }; | |
861 | ||
ad7b8b33 AL |
862 | int kvm_check_extension(KVMState *s, unsigned int extension) |
863 | { | |
864 | int ret; | |
865 | ||
866 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
867 | if (ret < 0) { | |
868 | ret = 0; | |
869 | } | |
870 | ||
871 | return ret; | |
872 | } | |
873 | ||
7d0a07fa AG |
874 | int kvm_vm_check_extension(KVMState *s, unsigned int extension) |
875 | { | |
876 | int ret; | |
877 | ||
878 | ret = kvm_vm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
879 | if (ret < 0) { | |
880 | /* VM wide version not implemented, use global one instead */ | |
881 | ret = kvm_check_extension(s, extension); | |
882 | } | |
883 | ||
884 | return ret; | |
885 | } | |
886 | ||
6b552b9b DG |
887 | typedef struct HWPoisonPage { |
888 | ram_addr_t ram_addr; | |
889 | QLIST_ENTRY(HWPoisonPage) list; | |
890 | } HWPoisonPage; | |
891 | ||
892 | static QLIST_HEAD(, HWPoisonPage) hwpoison_page_list = | |
893 | QLIST_HEAD_INITIALIZER(hwpoison_page_list); | |
894 | ||
895 | static void kvm_unpoison_all(void *param) | |
896 | { | |
897 | HWPoisonPage *page, *next_page; | |
898 | ||
899 | QLIST_FOREACH_SAFE(page, &hwpoison_page_list, list, next_page) { | |
900 | QLIST_REMOVE(page, list); | |
901 | qemu_ram_remap(page->ram_addr, TARGET_PAGE_SIZE); | |
902 | g_free(page); | |
903 | } | |
904 | } | |
905 | ||
906 | void kvm_hwpoison_page_add(ram_addr_t ram_addr) | |
907 | { | |
908 | HWPoisonPage *page; | |
909 | ||
910 | QLIST_FOREACH(page, &hwpoison_page_list, list) { | |
911 | if (page->ram_addr == ram_addr) { | |
912 | return; | |
913 | } | |
914 | } | |
915 | page = g_new(HWPoisonPage, 1); | |
916 | page->ram_addr = ram_addr; | |
917 | QLIST_INSERT_HEAD(&hwpoison_page_list, page, list); | |
918 | } | |
919 | ||
b680c5ba GK |
920 | static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size) |
921 | { | |
922 | #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN) | |
923 | /* The kernel expects ioeventfd values in HOST_WORDS_BIGENDIAN | |
924 | * endianness, but the memory core hands them in target endianness. | |
925 | * For example, PPC is always treated as big-endian even if running | |
926 | * on KVM and on PPC64LE. Correct here. | |
927 | */ | |
928 | switch (size) { | |
929 | case 2: | |
930 | val = bswap16(val); | |
931 | break; | |
932 | case 4: | |
933 | val = bswap32(val); | |
934 | break; | |
935 | } | |
936 | #endif | |
937 | return val; | |
938 | } | |
939 | ||
584f2be7 | 940 | static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val, |
41cb62c2 | 941 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
942 | { |
943 | int ret; | |
03a96b83 TH |
944 | struct kvm_ioeventfd iofd = { |
945 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, | |
946 | .addr = addr, | |
947 | .len = size, | |
948 | .flags = 0, | |
949 | .fd = fd, | |
950 | }; | |
500ffd4a | 951 | |
876d16cd DDAG |
952 | trace_kvm_set_ioeventfd_mmio(fd, (uint64_t)addr, val, assign, size, |
953 | datamatch); | |
500ffd4a MT |
954 | if (!kvm_enabled()) { |
955 | return -ENOSYS; | |
956 | } | |
957 | ||
41cb62c2 MT |
958 | if (datamatch) { |
959 | iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
960 | } | |
500ffd4a MT |
961 | if (!assign) { |
962 | iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
963 | } | |
964 | ||
965 | ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); | |
966 | ||
967 | if (ret < 0) { | |
968 | return -errno; | |
969 | } | |
970 | ||
971 | return 0; | |
972 | } | |
973 | ||
44c3f8f7 | 974 | static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val, |
41cb62c2 | 975 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
976 | { |
977 | struct kvm_ioeventfd kick = { | |
b680c5ba | 978 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, |
500ffd4a | 979 | .addr = addr, |
41cb62c2 | 980 | .flags = KVM_IOEVENTFD_FLAG_PIO, |
44c3f8f7 | 981 | .len = size, |
500ffd4a MT |
982 | .fd = fd, |
983 | }; | |
984 | int r; | |
876d16cd | 985 | trace_kvm_set_ioeventfd_pio(fd, addr, val, assign, size, datamatch); |
500ffd4a MT |
986 | if (!kvm_enabled()) { |
987 | return -ENOSYS; | |
988 | } | |
41cb62c2 MT |
989 | if (datamatch) { |
990 | kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
991 | } | |
500ffd4a MT |
992 | if (!assign) { |
993 | kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
994 | } | |
995 | r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); | |
996 | if (r < 0) { | |
997 | return r; | |
998 | } | |
999 | return 0; | |
1000 | } | |
1001 | ||
1002 | ||
d2f2b8a7 SH |
1003 | static int kvm_check_many_ioeventfds(void) |
1004 | { | |
d0dcac83 SH |
1005 | /* Userspace can use ioeventfd for io notification. This requires a host |
1006 | * that supports eventfd(2) and an I/O thread; since eventfd does not | |
1007 | * support SIGIO it cannot interrupt the vcpu. | |
1008 | * | |
1009 | * Older kernels have a 6 device limit on the KVM io bus. Find out so we | |
d2f2b8a7 SH |
1010 | * can avoid creating too many ioeventfds. |
1011 | */ | |
12d4536f | 1012 | #if defined(CONFIG_EVENTFD) |
d2f2b8a7 SH |
1013 | int ioeventfds[7]; |
1014 | int i, ret = 0; | |
1015 | for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { | |
1016 | ioeventfds[i] = eventfd(0, EFD_CLOEXEC); | |
1017 | if (ioeventfds[i] < 0) { | |
1018 | break; | |
1019 | } | |
41cb62c2 | 1020 | ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true); |
d2f2b8a7 SH |
1021 | if (ret < 0) { |
1022 | close(ioeventfds[i]); | |
1023 | break; | |
1024 | } | |
1025 | } | |
1026 | ||
1027 | /* Decide whether many devices are supported or not */ | |
1028 | ret = i == ARRAY_SIZE(ioeventfds); | |
1029 | ||
1030 | while (i-- > 0) { | |
41cb62c2 | 1031 | kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true); |
d2f2b8a7 SH |
1032 | close(ioeventfds[i]); |
1033 | } | |
1034 | return ret; | |
1035 | #else | |
1036 | return 0; | |
1037 | #endif | |
1038 | } | |
1039 | ||
94a8d39a JK |
1040 | static const KVMCapabilityInfo * |
1041 | kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list) | |
1042 | { | |
1043 | while (list->name) { | |
1044 | if (!kvm_check_extension(s, list->value)) { | |
1045 | return list; | |
1046 | } | |
1047 | list++; | |
1048 | } | |
1049 | return NULL; | |
1050 | } | |
1051 | ||
023ae9a8 IM |
1052 | void kvm_set_max_memslot_size(hwaddr max_slot_size) |
1053 | { | |
1054 | g_assert( | |
1055 | ROUND_UP(max_slot_size, qemu_real_host_page_size) == max_slot_size | |
1056 | ); | |
1057 | kvm_max_slot_size = max_slot_size; | |
1058 | } | |
1059 | ||
7bbda04c PB |
1060 | static void kvm_set_phys_mem(KVMMemoryListener *kml, |
1061 | MemoryRegionSection *section, bool add) | |
46dbef6a | 1062 | { |
f357f564 | 1063 | KVMSlot *mem; |
46dbef6a | 1064 | int err; |
a01672d3 | 1065 | MemoryRegion *mr = section->mr; |
235e8982 | 1066 | bool writeable = !mr->readonly && !mr->rom_device; |
023ae9a8 | 1067 | hwaddr start_addr, size, slot_size; |
5ea69c2e | 1068 | void *ram; |
46dbef6a | 1069 | |
a01672d3 | 1070 | if (!memory_region_is_ram(mr)) { |
235e8982 JJ |
1071 | if (writeable || !kvm_readonly_mem_allowed) { |
1072 | return; | |
1073 | } else if (!mr->romd_mode) { | |
1074 | /* If the memory device is not in romd_mode, then we actually want | |
1075 | * to remove the kvm memory slot so all accesses will trap. */ | |
1076 | add = false; | |
1077 | } | |
9f213ed9 AK |
1078 | } |
1079 | ||
5ea69c2e DH |
1080 | size = kvm_align_section(section, &start_addr); |
1081 | if (!size) { | |
1082 | return; | |
1083 | } | |
1084 | ||
bbfd3017 | 1085 | /* use aligned delta to align the ram address */ |
5ea69c2e | 1086 | ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + |
bbfd3017 | 1087 | (start_addr - section->offset_within_address_space); |
a01672d3 | 1088 | |
36adac49 PX |
1089 | kvm_slots_lock(kml); |
1090 | ||
f357f564 | 1091 | if (!add) { |
023ae9a8 IM |
1092 | do { |
1093 | slot_size = MIN(kvm_max_slot_size, size); | |
1094 | mem = kvm_lookup_matching_slot(kml, start_addr, slot_size); | |
1095 | if (!mem) { | |
1096 | goto out; | |
1097 | } | |
1098 | if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { | |
1099 | kvm_physical_sync_dirty_bitmap(kml, section); | |
1100 | } | |
3fbffb62 | 1101 | |
023ae9a8 IM |
1102 | /* unregister the slot */ |
1103 | g_free(mem->dirty_bmap); | |
1104 | mem->dirty_bmap = NULL; | |
1105 | mem->memory_size = 0; | |
1106 | mem->flags = 0; | |
1107 | err = kvm_set_user_memory_region(kml, mem, false); | |
1108 | if (err) { | |
1109 | fprintf(stderr, "%s: error unregistering slot: %s\n", | |
1110 | __func__, strerror(-err)); | |
1111 | abort(); | |
1112 | } | |
1113 | start_addr += slot_size; | |
1114 | size -= slot_size; | |
1115 | } while (size); | |
36adac49 | 1116 | goto out; |
46dbef6a MT |
1117 | } |
1118 | ||
f357f564 | 1119 | /* register the new slot */ |
023ae9a8 IM |
1120 | do { |
1121 | slot_size = MIN(kvm_max_slot_size, size); | |
1122 | mem = kvm_alloc_slot(kml); | |
1123 | mem->memory_size = slot_size; | |
1124 | mem->start_addr = start_addr; | |
1125 | mem->ram = ram; | |
1126 | mem->flags = kvm_mem_flags(mr); | |
1127 | ||
9b3a31c7 DDAG |
1128 | if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { |
1129 | /* | |
1130 | * Reallocate the bmap; it means it doesn't disappear in | |
1131 | * middle of a migrate. | |
1132 | */ | |
1133 | kvm_memslot_init_dirty_bitmap(mem); | |
1134 | } | |
023ae9a8 IM |
1135 | err = kvm_set_user_memory_region(kml, mem, true); |
1136 | if (err) { | |
1137 | fprintf(stderr, "%s: error registering slot: %s\n", __func__, | |
1138 | strerror(-err)); | |
1139 | abort(); | |
1140 | } | |
1141 | start_addr += slot_size; | |
1142 | ram += slot_size; | |
1143 | size -= slot_size; | |
1144 | } while (size); | |
36adac49 PX |
1145 | |
1146 | out: | |
1147 | kvm_slots_unlock(kml); | |
46dbef6a MT |
1148 | } |
1149 | ||
a01672d3 AK |
1150 | static void kvm_region_add(MemoryListener *listener, |
1151 | MemoryRegionSection *section) | |
1152 | { | |
7bbda04c PB |
1153 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
1154 | ||
dfde4e6e | 1155 | memory_region_ref(section->mr); |
7bbda04c | 1156 | kvm_set_phys_mem(kml, section, true); |
a01672d3 AK |
1157 | } |
1158 | ||
1159 | static void kvm_region_del(MemoryListener *listener, | |
1160 | MemoryRegionSection *section) | |
1161 | { | |
7bbda04c PB |
1162 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
1163 | ||
1164 | kvm_set_phys_mem(kml, section, false); | |
dfde4e6e | 1165 | memory_region_unref(section->mr); |
a01672d3 AK |
1166 | } |
1167 | ||
1168 | static void kvm_log_sync(MemoryListener *listener, | |
1169 | MemoryRegionSection *section) | |
7b8f3b78 | 1170 | { |
7bbda04c | 1171 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
1172 | int r; |
1173 | ||
36adac49 | 1174 | kvm_slots_lock(kml); |
7bbda04c | 1175 | r = kvm_physical_sync_dirty_bitmap(kml, section); |
36adac49 | 1176 | kvm_slots_unlock(kml); |
a01672d3 AK |
1177 | if (r < 0) { |
1178 | abort(); | |
1179 | } | |
7b8f3b78 MT |
1180 | } |
1181 | ||
ff4aa114 PX |
1182 | static void kvm_log_clear(MemoryListener *listener, |
1183 | MemoryRegionSection *section) | |
1184 | { | |
1185 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); | |
1186 | int r; | |
1187 | ||
1188 | r = kvm_physical_log_clear(kml, section); | |
1189 | if (r < 0) { | |
1190 | error_report_once("%s: kvm log clear failed: mr=%s " | |
1191 | "offset=%"HWADDR_PRIx" size=%"PRIx64, __func__, | |
1192 | section->mr->name, section->offset_within_region, | |
1193 | int128_get64(section->size)); | |
1194 | abort(); | |
1195 | } | |
1196 | } | |
1197 | ||
d22b096e AK |
1198 | static void kvm_mem_ioeventfd_add(MemoryListener *listener, |
1199 | MemoryRegionSection *section, | |
1200 | bool match_data, uint64_t data, | |
1201 | EventNotifier *e) | |
1202 | { | |
1203 | int fd = event_notifier_get_fd(e); | |
80a1ea37 AK |
1204 | int r; |
1205 | ||
4b8f1c88 | 1206 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
1207 | data, true, int128_get64(section->size), |
1208 | match_data); | |
80a1ea37 | 1209 | if (r < 0) { |
e346bcbf YK |
1210 | fprintf(stderr, "%s: error adding ioeventfd: %s (%d)\n", |
1211 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1212 | abort(); |
1213 | } | |
1214 | } | |
1215 | ||
d22b096e AK |
1216 | static void kvm_mem_ioeventfd_del(MemoryListener *listener, |
1217 | MemoryRegionSection *section, | |
1218 | bool match_data, uint64_t data, | |
1219 | EventNotifier *e) | |
80a1ea37 | 1220 | { |
d22b096e | 1221 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
1222 | int r; |
1223 | ||
4b8f1c88 | 1224 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
1225 | data, false, int128_get64(section->size), |
1226 | match_data); | |
80a1ea37 | 1227 | if (r < 0) { |
e346bcbf YK |
1228 | fprintf(stderr, "%s: error deleting ioeventfd: %s (%d)\n", |
1229 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1230 | abort(); |
1231 | } | |
1232 | } | |
1233 | ||
d22b096e AK |
1234 | static void kvm_io_ioeventfd_add(MemoryListener *listener, |
1235 | MemoryRegionSection *section, | |
1236 | bool match_data, uint64_t data, | |
1237 | EventNotifier *e) | |
80a1ea37 | 1238 | { |
d22b096e | 1239 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
1240 | int r; |
1241 | ||
44c3f8f7 | 1242 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
1243 | data, true, int128_get64(section->size), |
1244 | match_data); | |
80a1ea37 | 1245 | if (r < 0) { |
e346bcbf YK |
1246 | fprintf(stderr, "%s: error adding ioeventfd: %s (%d)\n", |
1247 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1248 | abort(); |
1249 | } | |
1250 | } | |
1251 | ||
d22b096e AK |
1252 | static void kvm_io_ioeventfd_del(MemoryListener *listener, |
1253 | MemoryRegionSection *section, | |
1254 | bool match_data, uint64_t data, | |
1255 | EventNotifier *e) | |
80a1ea37 AK |
1256 | |
1257 | { | |
d22b096e | 1258 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
1259 | int r; |
1260 | ||
44c3f8f7 | 1261 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
1262 | data, false, int128_get64(section->size), |
1263 | match_data); | |
80a1ea37 | 1264 | if (r < 0) { |
e346bcbf YK |
1265 | fprintf(stderr, "%s: error deleting ioeventfd: %s (%d)\n", |
1266 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1267 | abort(); |
1268 | } | |
1269 | } | |
1270 | ||
38bfe691 PB |
1271 | void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml, |
1272 | AddressSpace *as, int as_id) | |
7bbda04c PB |
1273 | { |
1274 | int i; | |
1275 | ||
36adac49 | 1276 | qemu_mutex_init(&kml->slots_lock); |
7bbda04c | 1277 | kml->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot)); |
38bfe691 | 1278 | kml->as_id = as_id; |
7bbda04c PB |
1279 | |
1280 | for (i = 0; i < s->nr_slots; i++) { | |
1281 | kml->slots[i].slot = i; | |
1282 | } | |
1283 | ||
1284 | kml->listener.region_add = kvm_region_add; | |
1285 | kml->listener.region_del = kvm_region_del; | |
1286 | kml->listener.log_start = kvm_log_start; | |
1287 | kml->listener.log_stop = kvm_log_stop; | |
1288 | kml->listener.log_sync = kvm_log_sync; | |
ff4aa114 | 1289 | kml->listener.log_clear = kvm_log_clear; |
7bbda04c PB |
1290 | kml->listener.priority = 10; |
1291 | ||
1292 | memory_listener_register(&kml->listener, as); | |
8072aae3 AK |
1293 | |
1294 | for (i = 0; i < s->nr_as; ++i) { | |
1295 | if (!s->as[i].as) { | |
1296 | s->as[i].as = as; | |
1297 | s->as[i].ml = kml; | |
1298 | break; | |
1299 | } | |
1300 | } | |
7bbda04c | 1301 | } |
d22b096e AK |
1302 | |
1303 | static MemoryListener kvm_io_listener = { | |
d22b096e AK |
1304 | .eventfd_add = kvm_io_ioeventfd_add, |
1305 | .eventfd_del = kvm_io_ioeventfd_del, | |
72e22d2f | 1306 | .priority = 10, |
7b8f3b78 MT |
1307 | }; |
1308 | ||
3889c3fa | 1309 | int kvm_set_irq(KVMState *s, int irq, int level) |
84b058d7 JK |
1310 | { |
1311 | struct kvm_irq_level event; | |
1312 | int ret; | |
1313 | ||
7ae26bd4 | 1314 | assert(kvm_async_interrupts_enabled()); |
84b058d7 JK |
1315 | |
1316 | event.level = level; | |
1317 | event.irq = irq; | |
e333cd69 | 1318 | ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event); |
84b058d7 | 1319 | if (ret < 0) { |
3889c3fa | 1320 | perror("kvm_set_irq"); |
84b058d7 JK |
1321 | abort(); |
1322 | } | |
1323 | ||
e333cd69 | 1324 | return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status; |
84b058d7 JK |
1325 | } |
1326 | ||
1327 | #ifdef KVM_CAP_IRQ_ROUTING | |
d3d3bef0 JK |
1328 | typedef struct KVMMSIRoute { |
1329 | struct kvm_irq_routing_entry kroute; | |
1330 | QTAILQ_ENTRY(KVMMSIRoute) entry; | |
1331 | } KVMMSIRoute; | |
1332 | ||
84b058d7 JK |
1333 | static void set_gsi(KVMState *s, unsigned int gsi) |
1334 | { | |
8269fb70 | 1335 | set_bit(gsi, s->used_gsi_bitmap); |
84b058d7 JK |
1336 | } |
1337 | ||
04fa27f5 JK |
1338 | static void clear_gsi(KVMState *s, unsigned int gsi) |
1339 | { | |
8269fb70 | 1340 | clear_bit(gsi, s->used_gsi_bitmap); |
04fa27f5 JK |
1341 | } |
1342 | ||
7b774593 | 1343 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 | 1344 | { |
04fa27f5 | 1345 | int gsi_count, i; |
84b058d7 | 1346 | |
00008418 | 1347 | gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1; |
84b058d7 | 1348 | if (gsi_count > 0) { |
84b058d7 | 1349 | /* Round up so we can search ints using ffs */ |
8269fb70 | 1350 | s->used_gsi_bitmap = bitmap_new(gsi_count); |
4e2e4e63 | 1351 | s->gsi_count = gsi_count; |
84b058d7 JK |
1352 | } |
1353 | ||
1354 | s->irq_routes = g_malloc0(sizeof(*s->irq_routes)); | |
1355 | s->nr_allocated_irq_routes = 0; | |
1356 | ||
50bf31b9 | 1357 | if (!kvm_direct_msi_allowed) { |
4a3adebb JK |
1358 | for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) { |
1359 | QTAILQ_INIT(&s->msi_hashtab[i]); | |
1360 | } | |
04fa27f5 JK |
1361 | } |
1362 | ||
84b058d7 JK |
1363 | kvm_arch_init_irq_routing(s); |
1364 | } | |
1365 | ||
cb925cf9 | 1366 | void kvm_irqchip_commit_routes(KVMState *s) |
e7b20308 JK |
1367 | { |
1368 | int ret; | |
1369 | ||
7005f7f8 PX |
1370 | if (kvm_gsi_direct_mapping()) { |
1371 | return; | |
1372 | } | |
1373 | ||
1374 | if (!kvm_gsi_routing_enabled()) { | |
1375 | return; | |
1376 | } | |
1377 | ||
e7b20308 | 1378 | s->irq_routes->flags = 0; |
54a6c11b | 1379 | trace_kvm_irqchip_commit_routes(); |
e7b20308 JK |
1380 | ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); |
1381 | assert(ret == 0); | |
1382 | } | |
1383 | ||
84b058d7 JK |
1384 | static void kvm_add_routing_entry(KVMState *s, |
1385 | struct kvm_irq_routing_entry *entry) | |
1386 | { | |
1387 | struct kvm_irq_routing_entry *new; | |
1388 | int n, size; | |
1389 | ||
1390 | if (s->irq_routes->nr == s->nr_allocated_irq_routes) { | |
1391 | n = s->nr_allocated_irq_routes * 2; | |
1392 | if (n < 64) { | |
1393 | n = 64; | |
1394 | } | |
1395 | size = sizeof(struct kvm_irq_routing); | |
1396 | size += n * sizeof(*new); | |
1397 | s->irq_routes = g_realloc(s->irq_routes, size); | |
1398 | s->nr_allocated_irq_routes = n; | |
1399 | } | |
1400 | n = s->irq_routes->nr++; | |
1401 | new = &s->irq_routes->entries[n]; | |
0fbc2074 MT |
1402 | |
1403 | *new = *entry; | |
84b058d7 JK |
1404 | |
1405 | set_gsi(s, entry->gsi); | |
1406 | } | |
1407 | ||
cc57407e JK |
1408 | static int kvm_update_routing_entry(KVMState *s, |
1409 | struct kvm_irq_routing_entry *new_entry) | |
1410 | { | |
1411 | struct kvm_irq_routing_entry *entry; | |
1412 | int n; | |
1413 | ||
1414 | for (n = 0; n < s->irq_routes->nr; n++) { | |
1415 | entry = &s->irq_routes->entries[n]; | |
1416 | if (entry->gsi != new_entry->gsi) { | |
1417 | continue; | |
1418 | } | |
1419 | ||
40509f7f MT |
1420 | if(!memcmp(entry, new_entry, sizeof *entry)) { |
1421 | return 0; | |
1422 | } | |
1423 | ||
0fbc2074 | 1424 | *entry = *new_entry; |
cc57407e | 1425 | |
cc57407e JK |
1426 | return 0; |
1427 | } | |
1428 | ||
1429 | return -ESRCH; | |
1430 | } | |
1431 | ||
1df186df | 1432 | void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin) |
84b058d7 | 1433 | { |
0fbc2074 | 1434 | struct kvm_irq_routing_entry e = {}; |
84b058d7 | 1435 | |
4e2e4e63 JK |
1436 | assert(pin < s->gsi_count); |
1437 | ||
84b058d7 JK |
1438 | e.gsi = irq; |
1439 | e.type = KVM_IRQ_ROUTING_IRQCHIP; | |
1440 | e.flags = 0; | |
1441 | e.u.irqchip.irqchip = irqchip; | |
1442 | e.u.irqchip.pin = pin; | |
1443 | kvm_add_routing_entry(s, &e); | |
1444 | } | |
1445 | ||
1e2aa8be | 1446 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
04fa27f5 JK |
1447 | { |
1448 | struct kvm_irq_routing_entry *e; | |
1449 | int i; | |
1450 | ||
76fe21de AK |
1451 | if (kvm_gsi_direct_mapping()) { |
1452 | return; | |
1453 | } | |
1454 | ||
04fa27f5 JK |
1455 | for (i = 0; i < s->irq_routes->nr; i++) { |
1456 | e = &s->irq_routes->entries[i]; | |
1457 | if (e->gsi == virq) { | |
1458 | s->irq_routes->nr--; | |
1459 | *e = s->irq_routes->entries[s->irq_routes->nr]; | |
1460 | } | |
1461 | } | |
1462 | clear_gsi(s, virq); | |
38d87493 | 1463 | kvm_arch_release_virq_post(virq); |
9ba35d0b | 1464 | trace_kvm_irqchip_release_virq(virq); |
04fa27f5 JK |
1465 | } |
1466 | ||
3607715a DG |
1467 | void kvm_irqchip_add_change_notifier(Notifier *n) |
1468 | { | |
1469 | notifier_list_add(&kvm_irqchip_change_notifiers, n); | |
1470 | } | |
1471 | ||
1472 | void kvm_irqchip_remove_change_notifier(Notifier *n) | |
1473 | { | |
1474 | notifier_remove(n); | |
1475 | } | |
1476 | ||
1477 | void kvm_irqchip_change_notify(void) | |
1478 | { | |
1479 | notifier_list_notify(&kvm_irqchip_change_notifiers, NULL); | |
1480 | } | |
1481 | ||
04fa27f5 JK |
1482 | static unsigned int kvm_hash_msi(uint32_t data) |
1483 | { | |
1484 | /* This is optimized for IA32 MSI layout. However, no other arch shall | |
1485 | * repeat the mistake of not providing a direct MSI injection API. */ | |
1486 | return data & 0xff; | |
1487 | } | |
1488 | ||
1489 | static void kvm_flush_dynamic_msi_routes(KVMState *s) | |
1490 | { | |
1491 | KVMMSIRoute *route, *next; | |
1492 | unsigned int hash; | |
1493 | ||
1494 | for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) { | |
1495 | QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) { | |
1496 | kvm_irqchip_release_virq(s, route->kroute.gsi); | |
1497 | QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry); | |
1498 | g_free(route); | |
1499 | } | |
1500 | } | |
1501 | } | |
1502 | ||
1503 | static int kvm_irqchip_get_virq(KVMState *s) | |
1504 | { | |
8269fb70 | 1505 | int next_virq; |
04fa27f5 | 1506 | |
bdf02631 WM |
1507 | /* |
1508 | * PIC and IOAPIC share the first 16 GSI numbers, thus the available | |
1509 | * GSI numbers are more than the number of IRQ route. Allocating a GSI | |
1510 | * number can succeed even though a new route entry cannot be added. | |
1511 | * When this happens, flush dynamic MSI entries to free IRQ route entries. | |
1512 | */ | |
50bf31b9 | 1513 | if (!kvm_direct_msi_allowed && s->irq_routes->nr == s->gsi_count) { |
bdf02631 WM |
1514 | kvm_flush_dynamic_msi_routes(s); |
1515 | } | |
1516 | ||
04fa27f5 | 1517 | /* Return the lowest unused GSI in the bitmap */ |
8269fb70 WY |
1518 | next_virq = find_first_zero_bit(s->used_gsi_bitmap, s->gsi_count); |
1519 | if (next_virq >= s->gsi_count) { | |
1520 | return -ENOSPC; | |
1521 | } else { | |
1522 | return next_virq; | |
04fa27f5 | 1523 | } |
04fa27f5 JK |
1524 | } |
1525 | ||
1526 | static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg) | |
1527 | { | |
1528 | unsigned int hash = kvm_hash_msi(msg.data); | |
1529 | KVMMSIRoute *route; | |
1530 | ||
1531 | QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) { | |
1532 | if (route->kroute.u.msi.address_lo == (uint32_t)msg.address && | |
1533 | route->kroute.u.msi.address_hi == (msg.address >> 32) && | |
d07cc1f1 | 1534 | route->kroute.u.msi.data == le32_to_cpu(msg.data)) { |
04fa27f5 JK |
1535 | return route; |
1536 | } | |
1537 | } | |
1538 | return NULL; | |
1539 | } | |
1540 | ||
1541 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1542 | { | |
4a3adebb | 1543 | struct kvm_msi msi; |
04fa27f5 JK |
1544 | KVMMSIRoute *route; |
1545 | ||
50bf31b9 | 1546 | if (kvm_direct_msi_allowed) { |
4a3adebb JK |
1547 | msi.address_lo = (uint32_t)msg.address; |
1548 | msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1549 | msi.data = le32_to_cpu(msg.data); |
4a3adebb JK |
1550 | msi.flags = 0; |
1551 | memset(msi.pad, 0, sizeof(msi.pad)); | |
1552 | ||
1553 | return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi); | |
1554 | } | |
1555 | ||
04fa27f5 JK |
1556 | route = kvm_lookup_msi_route(s, msg); |
1557 | if (!route) { | |
e7b20308 | 1558 | int virq; |
04fa27f5 JK |
1559 | |
1560 | virq = kvm_irqchip_get_virq(s); | |
1561 | if (virq < 0) { | |
1562 | return virq; | |
1563 | } | |
1564 | ||
0fbc2074 | 1565 | route = g_malloc0(sizeof(KVMMSIRoute)); |
04fa27f5 JK |
1566 | route->kroute.gsi = virq; |
1567 | route->kroute.type = KVM_IRQ_ROUTING_MSI; | |
1568 | route->kroute.flags = 0; | |
1569 | route->kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1570 | route->kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1571 | route->kroute.u.msi.data = le32_to_cpu(msg.data); |
04fa27f5 JK |
1572 | |
1573 | kvm_add_routing_entry(s, &route->kroute); | |
cb925cf9 | 1574 | kvm_irqchip_commit_routes(s); |
04fa27f5 JK |
1575 | |
1576 | QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route, | |
1577 | entry); | |
04fa27f5 JK |
1578 | } |
1579 | ||
1580 | assert(route->kroute.type == KVM_IRQ_ROUTING_MSI); | |
1581 | ||
3889c3fa | 1582 | return kvm_set_irq(s, route->kroute.gsi, 1); |
04fa27f5 JK |
1583 | } |
1584 | ||
d1f6af6a | 1585 | int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) |
92b4e489 | 1586 | { |
0fbc2074 | 1587 | struct kvm_irq_routing_entry kroute = {}; |
92b4e489 | 1588 | int virq; |
d1f6af6a PX |
1589 | MSIMessage msg = {0, 0}; |
1590 | ||
88c725c7 | 1591 | if (pci_available && dev) { |
e1d4fb2d | 1592 | msg = pci_get_msi_message(dev, vector); |
d1f6af6a | 1593 | } |
92b4e489 | 1594 | |
76fe21de | 1595 | if (kvm_gsi_direct_mapping()) { |
1850b6b7 | 1596 | return kvm_arch_msi_data_to_gsi(msg.data); |
76fe21de AK |
1597 | } |
1598 | ||
f3e1bed8 | 1599 | if (!kvm_gsi_routing_enabled()) { |
92b4e489 JK |
1600 | return -ENOSYS; |
1601 | } | |
1602 | ||
1603 | virq = kvm_irqchip_get_virq(s); | |
1604 | if (virq < 0) { | |
1605 | return virq; | |
1606 | } | |
1607 | ||
1608 | kroute.gsi = virq; | |
1609 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1610 | kroute.flags = 0; | |
1611 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1612 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1613 | kroute.u.msi.data = le32_to_cpu(msg.data); |
88c725c7 | 1614 | if (pci_available && kvm_msi_devid_required()) { |
767a554a PF |
1615 | kroute.flags = KVM_MSI_VALID_DEVID; |
1616 | kroute.u.msi.devid = pci_requester_id(dev); | |
1617 | } | |
dc9f06ca | 1618 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { |
9e03a040 FB |
1619 | kvm_irqchip_release_virq(s, virq); |
1620 | return -EINVAL; | |
1621 | } | |
92b4e489 | 1622 | |
9ba35d0b PX |
1623 | trace_kvm_irqchip_add_msi_route(dev ? dev->name : (char *)"N/A", |
1624 | vector, virq); | |
54a6c11b | 1625 | |
92b4e489 | 1626 | kvm_add_routing_entry(s, &kroute); |
38d87493 | 1627 | kvm_arch_add_msi_route_post(&kroute, vector, dev); |
cb925cf9 | 1628 | kvm_irqchip_commit_routes(s); |
92b4e489 JK |
1629 | |
1630 | return virq; | |
1631 | } | |
1632 | ||
dc9f06ca PF |
1633 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg, |
1634 | PCIDevice *dev) | |
cc57407e | 1635 | { |
0fbc2074 | 1636 | struct kvm_irq_routing_entry kroute = {}; |
cc57407e | 1637 | |
76fe21de AK |
1638 | if (kvm_gsi_direct_mapping()) { |
1639 | return 0; | |
1640 | } | |
1641 | ||
cc57407e JK |
1642 | if (!kvm_irqchip_in_kernel()) { |
1643 | return -ENOSYS; | |
1644 | } | |
1645 | ||
1646 | kroute.gsi = virq; | |
1647 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1648 | kroute.flags = 0; | |
1649 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1650 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1651 | kroute.u.msi.data = le32_to_cpu(msg.data); |
88c725c7 | 1652 | if (pci_available && kvm_msi_devid_required()) { |
767a554a PF |
1653 | kroute.flags = KVM_MSI_VALID_DEVID; |
1654 | kroute.u.msi.devid = pci_requester_id(dev); | |
1655 | } | |
dc9f06ca | 1656 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { |
9e03a040 FB |
1657 | return -EINVAL; |
1658 | } | |
cc57407e | 1659 | |
54a6c11b PX |
1660 | trace_kvm_irqchip_update_msi_route(virq); |
1661 | ||
cc57407e JK |
1662 | return kvm_update_routing_entry(s, &kroute); |
1663 | } | |
1664 | ||
ca916d37 VM |
1665 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int rfd, int virq, |
1666 | bool assign) | |
39853bbc JK |
1667 | { |
1668 | struct kvm_irqfd irqfd = { | |
1669 | .fd = fd, | |
1670 | .gsi = virq, | |
1671 | .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN, | |
1672 | }; | |
1673 | ||
ca916d37 VM |
1674 | if (rfd != -1) { |
1675 | irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE; | |
1676 | irqfd.resamplefd = rfd; | |
1677 | } | |
1678 | ||
cc7e0ddf | 1679 | if (!kvm_irqfds_enabled()) { |
39853bbc JK |
1680 | return -ENOSYS; |
1681 | } | |
1682 | ||
1683 | return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd); | |
1684 | } | |
1685 | ||
d426d9fb CH |
1686 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
1687 | { | |
e9af2fef | 1688 | struct kvm_irq_routing_entry kroute = {}; |
d426d9fb CH |
1689 | int virq; |
1690 | ||
1691 | if (!kvm_gsi_routing_enabled()) { | |
1692 | return -ENOSYS; | |
1693 | } | |
1694 | ||
1695 | virq = kvm_irqchip_get_virq(s); | |
1696 | if (virq < 0) { | |
1697 | return virq; | |
1698 | } | |
1699 | ||
1700 | kroute.gsi = virq; | |
1701 | kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER; | |
1702 | kroute.flags = 0; | |
1703 | kroute.u.adapter.summary_addr = adapter->summary_addr; | |
1704 | kroute.u.adapter.ind_addr = adapter->ind_addr; | |
1705 | kroute.u.adapter.summary_offset = adapter->summary_offset; | |
1706 | kroute.u.adapter.ind_offset = adapter->ind_offset; | |
1707 | kroute.u.adapter.adapter_id = adapter->adapter_id; | |
1708 | ||
1709 | kvm_add_routing_entry(s, &kroute); | |
d426d9fb CH |
1710 | |
1711 | return virq; | |
1712 | } | |
1713 | ||
977a8d9c AS |
1714 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) |
1715 | { | |
1716 | struct kvm_irq_routing_entry kroute = {}; | |
1717 | int virq; | |
1718 | ||
1719 | if (!kvm_gsi_routing_enabled()) { | |
1720 | return -ENOSYS; | |
1721 | } | |
1722 | if (!kvm_check_extension(s, KVM_CAP_HYPERV_SYNIC)) { | |
1723 | return -ENOSYS; | |
1724 | } | |
1725 | virq = kvm_irqchip_get_virq(s); | |
1726 | if (virq < 0) { | |
1727 | return virq; | |
1728 | } | |
1729 | ||
1730 | kroute.gsi = virq; | |
1731 | kroute.type = KVM_IRQ_ROUTING_HV_SINT; | |
1732 | kroute.flags = 0; | |
1733 | kroute.u.hv_sint.vcpu = vcpu; | |
1734 | kroute.u.hv_sint.sint = sint; | |
1735 | ||
1736 | kvm_add_routing_entry(s, &kroute); | |
1737 | kvm_irqchip_commit_routes(s); | |
1738 | ||
1739 | return virq; | |
1740 | } | |
1741 | ||
84b058d7 JK |
1742 | #else /* !KVM_CAP_IRQ_ROUTING */ |
1743 | ||
7b774593 | 1744 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 JK |
1745 | { |
1746 | } | |
04fa27f5 | 1747 | |
d3d3bef0 JK |
1748 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
1749 | { | |
1750 | } | |
1751 | ||
04fa27f5 JK |
1752 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) |
1753 | { | |
1754 | abort(); | |
1755 | } | |
92b4e489 | 1756 | |
d1f6af6a | 1757 | int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) |
92b4e489 | 1758 | { |
df410675 | 1759 | return -ENOSYS; |
92b4e489 | 1760 | } |
39853bbc | 1761 | |
d426d9fb CH |
1762 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
1763 | { | |
1764 | return -ENOSYS; | |
1765 | } | |
1766 | ||
977a8d9c AS |
1767 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) |
1768 | { | |
1769 | return -ENOSYS; | |
1770 | } | |
1771 | ||
39853bbc JK |
1772 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign) |
1773 | { | |
1774 | abort(); | |
1775 | } | |
dabe3143 MT |
1776 | |
1777 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) | |
1778 | { | |
1779 | return -ENOSYS; | |
1780 | } | |
84b058d7 JK |
1781 | #endif /* !KVM_CAP_IRQ_ROUTING */ |
1782 | ||
1c9b71a7 EA |
1783 | int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, |
1784 | EventNotifier *rn, int virq) | |
39853bbc | 1785 | { |
ca916d37 VM |
1786 | return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), |
1787 | rn ? event_notifier_get_fd(rn) : -1, virq, true); | |
39853bbc JK |
1788 | } |
1789 | ||
1c9b71a7 EA |
1790 | int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, |
1791 | int virq) | |
15b2bd18 | 1792 | { |
ca916d37 VM |
1793 | return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), -1, virq, |
1794 | false); | |
15b2bd18 PB |
1795 | } |
1796 | ||
197e3524 EA |
1797 | int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, |
1798 | EventNotifier *rn, qemu_irq irq) | |
1799 | { | |
1800 | gpointer key, gsi; | |
1801 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
1802 | ||
1803 | if (!found) { | |
1804 | return -ENXIO; | |
1805 | } | |
1806 | return kvm_irqchip_add_irqfd_notifier_gsi(s, n, rn, GPOINTER_TO_INT(gsi)); | |
1807 | } | |
1808 | ||
1809 | int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, | |
1810 | qemu_irq irq) | |
1811 | { | |
1812 | gpointer key, gsi; | |
1813 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
1814 | ||
1815 | if (!found) { | |
1816 | return -ENXIO; | |
1817 | } | |
1818 | return kvm_irqchip_remove_irqfd_notifier_gsi(s, n, GPOINTER_TO_INT(gsi)); | |
1819 | } | |
1820 | ||
1821 | void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi) | |
1822 | { | |
1823 | g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi)); | |
1824 | } | |
1825 | ||
4376c40d | 1826 | static void kvm_irqchip_create(KVMState *s) |
84b058d7 | 1827 | { |
84b058d7 JK |
1828 | int ret; |
1829 | ||
d1972be1 | 1830 | assert(s->kernel_irqchip_split != ON_OFF_AUTO_AUTO); |
8db4936b PB |
1831 | if (kvm_check_extension(s, KVM_CAP_IRQCHIP)) { |
1832 | ; | |
1833 | } else if (kvm_check_extension(s, KVM_CAP_S390_IRQCHIP)) { | |
1834 | ret = kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0); | |
1835 | if (ret < 0) { | |
1836 | fprintf(stderr, "Enable kernel irqchip failed: %s\n", strerror(-ret)); | |
1837 | exit(1); | |
1838 | } | |
1839 | } else { | |
1840 | return; | |
84b058d7 JK |
1841 | } |
1842 | ||
d6032e06 CD |
1843 | /* First probe and see if there's a arch-specific hook to create the |
1844 | * in-kernel irqchip for us */ | |
4376c40d | 1845 | ret = kvm_arch_irqchip_create(s); |
8db4936b | 1846 | if (ret == 0) { |
d1972be1 | 1847 | if (s->kernel_irqchip_split == ON_OFF_AUTO_ON) { |
15eafc2e PB |
1848 | perror("Split IRQ chip mode not supported."); |
1849 | exit(1); | |
1850 | } else { | |
1851 | ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); | |
1852 | } | |
8db4936b PB |
1853 | } |
1854 | if (ret < 0) { | |
1855 | fprintf(stderr, "Create kernel irqchip failed: %s\n", strerror(-ret)); | |
1856 | exit(1); | |
84b058d7 JK |
1857 | } |
1858 | ||
3d4b2649 | 1859 | kvm_kernel_irqchip = true; |
7ae26bd4 PM |
1860 | /* If we have an in-kernel IRQ chip then we must have asynchronous |
1861 | * interrupt delivery (though the reverse is not necessarily true) | |
1862 | */ | |
1863 | kvm_async_interrupts_allowed = true; | |
215e79c0 | 1864 | kvm_halt_in_kernel_allowed = true; |
84b058d7 JK |
1865 | |
1866 | kvm_init_irq_routing(s); | |
1867 | ||
197e3524 | 1868 | s->gsimap = g_hash_table_new(g_direct_hash, g_direct_equal); |
84b058d7 JK |
1869 | } |
1870 | ||
670436ce AJ |
1871 | /* Find number of supported CPUs using the recommended |
1872 | * procedure from the kernel API documentation to cope with | |
1873 | * older kernels that may be missing capabilities. | |
1874 | */ | |
1875 | static int kvm_recommended_vcpus(KVMState *s) | |
3ed444e9 | 1876 | { |
11748ba7 | 1877 | int ret = kvm_vm_check_extension(s, KVM_CAP_NR_VCPUS); |
670436ce AJ |
1878 | return (ret) ? ret : 4; |
1879 | } | |
3ed444e9 | 1880 | |
670436ce AJ |
1881 | static int kvm_max_vcpus(KVMState *s) |
1882 | { | |
1883 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS); | |
1884 | return (ret) ? ret : kvm_recommended_vcpus(s); | |
3ed444e9 DH |
1885 | } |
1886 | ||
f31e3266 GK |
1887 | static int kvm_max_vcpu_id(KVMState *s) |
1888 | { | |
1889 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPU_ID); | |
1890 | return (ret) ? ret : kvm_max_vcpus(s); | |
1891 | } | |
1892 | ||
41264b38 GK |
1893 | bool kvm_vcpu_id_is_valid(int vcpu_id) |
1894 | { | |
4f7f5893 | 1895 | KVMState *s = KVM_STATE(current_accel()); |
f31e3266 | 1896 | return vcpu_id >= 0 && vcpu_id < kvm_max_vcpu_id(s); |
41264b38 GK |
1897 | } |
1898 | ||
f6a1ef64 | 1899 | static int kvm_init(MachineState *ms) |
05330448 | 1900 | { |
f6a1ef64 | 1901 | MachineClass *mc = MACHINE_GET_CLASS(ms); |
168ccc11 JK |
1902 | static const char upgrade_note[] = |
1903 | "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" | |
1904 | "(see http://sourceforge.net/projects/kvm).\n"; | |
670436ce AJ |
1905 | struct { |
1906 | const char *name; | |
1907 | int num; | |
1908 | } num_cpus[] = { | |
5cc8767d LX |
1909 | { "SMP", ms->smp.cpus }, |
1910 | { "hotpluggable", ms->smp.max_cpus }, | |
670436ce AJ |
1911 | { NULL, } |
1912 | }, *nc = num_cpus; | |
1913 | int soft_vcpus_limit, hard_vcpus_limit; | |
05330448 | 1914 | KVMState *s; |
94a8d39a | 1915 | const KVMCapabilityInfo *missing_cap; |
05330448 | 1916 | int ret; |
7bbda04c | 1917 | int type = 0; |
135a129a | 1918 | const char *kvm_type; |
05330448 | 1919 | |
fc02086b | 1920 | s = KVM_STATE(ms->accelerator); |
05330448 | 1921 | |
3145fcb6 DG |
1922 | /* |
1923 | * On systems where the kernel can support different base page | |
1924 | * sizes, host page size may be different from TARGET_PAGE_SIZE, | |
1925 | * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum | |
1926 | * page size for the system though. | |
1927 | */ | |
038adc2f | 1928 | assert(TARGET_PAGE_SIZE <= qemu_real_host_page_size); |
3145fcb6 | 1929 | |
aed6efb9 JH |
1930 | s->sigmask_len = 8; |
1931 | ||
e22a25c9 | 1932 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
72cf2d4f | 1933 | QTAILQ_INIT(&s->kvm_sw_breakpoints); |
e22a25c9 | 1934 | #endif |
4c055ab5 | 1935 | QLIST_INIT(&s->kvm_parked_vcpus); |
05330448 | 1936 | s->vmfd = -1; |
40ff6d7e | 1937 | s->fd = qemu_open("/dev/kvm", O_RDWR); |
05330448 AL |
1938 | if (s->fd == -1) { |
1939 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); | |
1940 | ret = -errno; | |
1941 | goto err; | |
1942 | } | |
1943 | ||
1944 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); | |
1945 | if (ret < KVM_API_VERSION) { | |
0e1dac6c | 1946 | if (ret >= 0) { |
05330448 | 1947 | ret = -EINVAL; |
a426e122 | 1948 | } |
05330448 AL |
1949 | fprintf(stderr, "kvm version too old\n"); |
1950 | goto err; | |
1951 | } | |
1952 | ||
1953 | if (ret > KVM_API_VERSION) { | |
1954 | ret = -EINVAL; | |
1955 | fprintf(stderr, "kvm version not supported\n"); | |
1956 | goto err; | |
1957 | } | |
1958 | ||
cf0f7cf9 | 1959 | kvm_immediate_exit = kvm_check_extension(s, KVM_CAP_IMMEDIATE_EXIT); |
fb541ca5 AW |
1960 | s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS); |
1961 | ||
1962 | /* If unspecified, use the default value */ | |
1963 | if (!s->nr_slots) { | |
1964 | s->nr_slots = 32; | |
1965 | } | |
1966 | ||
8072aae3 AK |
1967 | s->nr_as = kvm_check_extension(s, KVM_CAP_MULTI_ADDRESS_SPACE); |
1968 | if (s->nr_as <= 1) { | |
1969 | s->nr_as = 1; | |
1970 | } | |
1971 | s->as = g_new0(struct KVMAs, s->nr_as); | |
1972 | ||
135a129a | 1973 | kvm_type = qemu_opt_get(qemu_get_machine_opts(), "kvm-type"); |
f1e29879 | 1974 | if (mc->kvm_type) { |
dc0ca80e | 1975 | type = mc->kvm_type(ms, kvm_type); |
135a129a | 1976 | } else if (kvm_type) { |
0e1dac6c | 1977 | ret = -EINVAL; |
135a129a AK |
1978 | fprintf(stderr, "Invalid argument kvm-type=%s\n", kvm_type); |
1979 | goto err; | |
1980 | } | |
1981 | ||
94ccff13 | 1982 | do { |
135a129a | 1983 | ret = kvm_ioctl(s, KVM_CREATE_VM, type); |
94ccff13 TK |
1984 | } while (ret == -EINTR); |
1985 | ||
1986 | if (ret < 0) { | |
521f438e | 1987 | fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret, |
94ccff13 TK |
1988 | strerror(-ret)); |
1989 | ||
0104dcac | 1990 | #ifdef TARGET_S390X |
2c80e996 CH |
1991 | if (ret == -EINVAL) { |
1992 | fprintf(stderr, | |
1993 | "Host kernel setup problem detected. Please verify:\n"); | |
1994 | fprintf(stderr, "- for kernels supporting the switch_amode or" | |
1995 | " user_mode parameters, whether\n"); | |
1996 | fprintf(stderr, | |
1997 | " user space is running in primary address space\n"); | |
1998 | fprintf(stderr, | |
1999 | "- for kernels supporting the vm.allocate_pgste sysctl, " | |
2000 | "whether it is enabled\n"); | |
2001 | } | |
0104dcac | 2002 | #endif |
05330448 | 2003 | goto err; |
0104dcac | 2004 | } |
05330448 | 2005 | |
94ccff13 | 2006 | s->vmfd = ret; |
11748ba7 GK |
2007 | |
2008 | /* check the vcpu limits */ | |
2009 | soft_vcpus_limit = kvm_recommended_vcpus(s); | |
2010 | hard_vcpus_limit = kvm_max_vcpus(s); | |
2011 | ||
2012 | while (nc->name) { | |
2013 | if (nc->num > soft_vcpus_limit) { | |
2014 | warn_report("Number of %s cpus requested (%d) exceeds " | |
2015 | "the recommended cpus supported by KVM (%d)", | |
2016 | nc->name, nc->num, soft_vcpus_limit); | |
2017 | ||
2018 | if (nc->num > hard_vcpus_limit) { | |
2019 | fprintf(stderr, "Number of %s cpus requested (%d) exceeds " | |
2020 | "the maximum cpus supported by KVM (%d)\n", | |
2021 | nc->name, nc->num, hard_vcpus_limit); | |
2022 | exit(1); | |
2023 | } | |
2024 | } | |
2025 | nc++; | |
2026 | } | |
2027 | ||
94a8d39a JK |
2028 | missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); |
2029 | if (!missing_cap) { | |
2030 | missing_cap = | |
2031 | kvm_check_extension_list(s, kvm_arch_required_capabilities); | |
05330448 | 2032 | } |
94a8d39a | 2033 | if (missing_cap) { |
ad7b8b33 | 2034 | ret = -EINVAL; |
94a8d39a JK |
2035 | fprintf(stderr, "kvm does not support %s\n%s", |
2036 | missing_cap->name, upgrade_note); | |
d85dc283 AL |
2037 | goto err; |
2038 | } | |
2039 | ||
ad7b8b33 | 2040 | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
e6d34aee PH |
2041 | s->coalesced_pio = s->coalesced_mmio && |
2042 | kvm_check_extension(s, KVM_CAP_COALESCED_PIO); | |
f65ed4c1 | 2043 | |
ff4aa114 PX |
2044 | s->manual_dirty_log_protect = |
2045 | kvm_check_extension(s, KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2); | |
2046 | if (s->manual_dirty_log_protect) { | |
2047 | ret = kvm_vm_enable_cap(s, KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2, 0, 1); | |
2048 | if (ret) { | |
2049 | warn_report("Trying to enable KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 " | |
2050 | "but failed. Falling back to the legacy mode. "); | |
2051 | s->manual_dirty_log_protect = false; | |
2052 | } | |
2053 | } | |
2054 | ||
a0fb002c JK |
2055 | #ifdef KVM_CAP_VCPU_EVENTS |
2056 | s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); | |
2057 | #endif | |
2058 | ||
b0b1d690 JK |
2059 | s->robust_singlestep = |
2060 | kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); | |
b0b1d690 | 2061 | |
ff44f1a3 JK |
2062 | #ifdef KVM_CAP_DEBUGREGS |
2063 | s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); | |
2064 | #endif | |
2065 | ||
ebbfef2f LA |
2066 | s->max_nested_state_len = kvm_check_extension(s, KVM_CAP_NESTED_STATE); |
2067 | ||
d3d3bef0 | 2068 | #ifdef KVM_CAP_IRQ_ROUTING |
50bf31b9 | 2069 | kvm_direct_msi_allowed = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0); |
d3d3bef0 | 2070 | #endif |
4a3adebb | 2071 | |
3ab73842 JK |
2072 | s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3); |
2073 | ||
e333cd69 | 2074 | s->irq_set_ioctl = KVM_IRQ_LINE; |
8732fbd2 | 2075 | if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) { |
e333cd69 | 2076 | s->irq_set_ioctl = KVM_IRQ_LINE_STATUS; |
8732fbd2 PM |
2077 | } |
2078 | ||
df9c8b75 JJ |
2079 | kvm_readonly_mem_allowed = |
2080 | (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0); | |
df9c8b75 | 2081 | |
69e03ae6 NN |
2082 | kvm_eventfds_allowed = |
2083 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0); | |
2084 | ||
f41389ae EA |
2085 | kvm_irqfds_allowed = |
2086 | (kvm_check_extension(s, KVM_CAP_IRQFD) > 0); | |
2087 | ||
2088 | kvm_resamplefds_allowed = | |
2089 | (kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0); | |
2090 | ||
d0a073a1 DD |
2091 | kvm_vm_attributes_allowed = |
2092 | (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0); | |
2093 | ||
35108223 JW |
2094 | kvm_ioeventfd_any_length_allowed = |
2095 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD_ANY_LENGTH) > 0); | |
2096 | ||
d870cfde GA |
2097 | kvm_state = s; |
2098 | ||
b20e3780 BS |
2099 | /* |
2100 | * if memory encryption object is specified then initialize the memory | |
2101 | * encryption context. | |
2102 | */ | |
2103 | if (ms->memory_encryption) { | |
2104 | kvm_state->memcrypt_handle = sev_guest_init(ms->memory_encryption); | |
2105 | if (!kvm_state->memcrypt_handle) { | |
2106 | ret = -1; | |
2107 | goto err; | |
2108 | } | |
54e89539 BS |
2109 | |
2110 | kvm_state->memcrypt_encrypt_data = sev_encrypt_data; | |
b20e3780 BS |
2111 | } |
2112 | ||
b16565b3 | 2113 | ret = kvm_arch_init(ms, s); |
a426e122 | 2114 | if (ret < 0) { |
05330448 | 2115 | goto err; |
a426e122 | 2116 | } |
05330448 | 2117 | |
d1972be1 XL |
2118 | if (s->kernel_irqchip_split == ON_OFF_AUTO_AUTO) { |
2119 | s->kernel_irqchip_split = mc->default_kernel_irqchip_split ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF; | |
2120 | } | |
2121 | ||
6b552b9b DG |
2122 | qemu_register_reset(kvm_unpoison_all, NULL); |
2123 | ||
11bc4a13 | 2124 | if (s->kernel_irqchip_allowed) { |
4376c40d | 2125 | kvm_irqchip_create(s); |
84b058d7 JK |
2126 | } |
2127 | ||
8c56c1a5 PF |
2128 | if (kvm_eventfds_allowed) { |
2129 | s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add; | |
2130 | s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del; | |
2131 | } | |
e6d34aee PH |
2132 | s->memory_listener.listener.coalesced_io_add = kvm_coalesce_mmio_region; |
2133 | s->memory_listener.listener.coalesced_io_del = kvm_uncoalesce_mmio_region; | |
7bbda04c PB |
2134 | |
2135 | kvm_memory_listener_register(s, &s->memory_listener, | |
38bfe691 | 2136 | &address_space_memory, 0); |
7bbda04c PB |
2137 | memory_listener_register(&kvm_io_listener, |
2138 | &address_space_io); | |
e6d34aee PH |
2139 | memory_listener_register(&kvm_coalesced_pio_listener, |
2140 | &address_space_io); | |
05330448 | 2141 | |
d2f2b8a7 SH |
2142 | s->many_ioeventfds = kvm_check_many_ioeventfds(); |
2143 | ||
62dd4eda | 2144 | s->sync_mmu = !!kvm_vm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); |
f5948942 AW |
2145 | if (!s->sync_mmu) { |
2146 | qemu_balloon_inhibit(true); | |
2147 | } | |
62dd4eda | 2148 | |
05330448 AL |
2149 | return 0; |
2150 | ||
2151 | err: | |
0e1dac6c | 2152 | assert(ret < 0); |
6d1cc321 SW |
2153 | if (s->vmfd >= 0) { |
2154 | close(s->vmfd); | |
2155 | } | |
2156 | if (s->fd != -1) { | |
2157 | close(s->fd); | |
05330448 | 2158 | } |
7bbda04c | 2159 | g_free(s->memory_listener.slots); |
05330448 AL |
2160 | |
2161 | return ret; | |
2162 | } | |
2163 | ||
aed6efb9 JH |
2164 | void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len) |
2165 | { | |
2166 | s->sigmask_len = sigmask_len; | |
2167 | } | |
2168 | ||
4c663752 PB |
2169 | static void kvm_handle_io(uint16_t port, MemTxAttrs attrs, void *data, int direction, |
2170 | int size, uint32_t count) | |
05330448 AL |
2171 | { |
2172 | int i; | |
2173 | uint8_t *ptr = data; | |
2174 | ||
2175 | for (i = 0; i < count; i++) { | |
4c663752 | 2176 | address_space_rw(&address_space_io, port, attrs, |
5c9eb028 | 2177 | ptr, size, |
354678c5 | 2178 | direction == KVM_EXIT_IO_OUT); |
05330448 AL |
2179 | ptr += size; |
2180 | } | |
05330448 AL |
2181 | } |
2182 | ||
5326ab55 | 2183 | static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run) |
7c80eef8 | 2184 | { |
977c7b6d RK |
2185 | fprintf(stderr, "KVM internal error. Suberror: %d\n", |
2186 | run->internal.suberror); | |
2187 | ||
7c80eef8 MT |
2188 | if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) { |
2189 | int i; | |
2190 | ||
7c80eef8 MT |
2191 | for (i = 0; i < run->internal.ndata; ++i) { |
2192 | fprintf(stderr, "extra data[%d]: %"PRIx64"\n", | |
2193 | i, (uint64_t)run->internal.data[i]); | |
2194 | } | |
2195 | } | |
7c80eef8 MT |
2196 | if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) { |
2197 | fprintf(stderr, "emulation failure\n"); | |
20d695a9 | 2198 | if (!kvm_arch_stop_on_emulation_error(cpu)) { |
90c84c56 | 2199 | cpu_dump_state(cpu, stderr, CPU_DUMP_CODE); |
d73cd8f4 | 2200 | return EXCP_INTERRUPT; |
a426e122 | 2201 | } |
7c80eef8 MT |
2202 | } |
2203 | /* FIXME: Should trigger a qmp message to let management know | |
2204 | * something went wrong. | |
2205 | */ | |
73aaec4a | 2206 | return -1; |
7c80eef8 | 2207 | } |
7c80eef8 | 2208 | |
62a2744c | 2209 | void kvm_flush_coalesced_mmio_buffer(void) |
f65ed4c1 | 2210 | { |
f65ed4c1 | 2211 | KVMState *s = kvm_state; |
1cae88b9 AK |
2212 | |
2213 | if (s->coalesced_flush_in_progress) { | |
2214 | return; | |
2215 | } | |
2216 | ||
2217 | s->coalesced_flush_in_progress = true; | |
2218 | ||
62a2744c SY |
2219 | if (s->coalesced_mmio_ring) { |
2220 | struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring; | |
f65ed4c1 AL |
2221 | while (ring->first != ring->last) { |
2222 | struct kvm_coalesced_mmio *ent; | |
2223 | ||
2224 | ent = &ring->coalesced_mmio[ring->first]; | |
2225 | ||
e6d34aee | 2226 | if (ent->pio == 1) { |
19f70347 PM |
2227 | address_space_write(&address_space_io, ent->phys_addr, |
2228 | MEMTXATTRS_UNSPECIFIED, ent->data, | |
2229 | ent->len); | |
e6d34aee PH |
2230 | } else { |
2231 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); | |
2232 | } | |
85199474 | 2233 | smp_wmb(); |
f65ed4c1 AL |
2234 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; |
2235 | } | |
2236 | } | |
1cae88b9 AK |
2237 | |
2238 | s->coalesced_flush_in_progress = false; | |
f65ed4c1 AL |
2239 | } |
2240 | ||
14e6fe12 | 2241 | static void do_kvm_cpu_synchronize_state(CPUState *cpu, run_on_cpu_data arg) |
4c0960c0 | 2242 | { |
99f31832 | 2243 | if (!cpu->vcpu_dirty) { |
20d695a9 | 2244 | kvm_arch_get_registers(cpu); |
99f31832 | 2245 | cpu->vcpu_dirty = true; |
4c0960c0 AK |
2246 | } |
2247 | } | |
2248 | ||
dd1750d7 | 2249 | void kvm_cpu_synchronize_state(CPUState *cpu) |
2705d56a | 2250 | { |
99f31832 | 2251 | if (!cpu->vcpu_dirty) { |
14e6fe12 | 2252 | run_on_cpu(cpu, do_kvm_cpu_synchronize_state, RUN_ON_CPU_NULL); |
a426e122 | 2253 | } |
2705d56a JK |
2254 | } |
2255 | ||
14e6fe12 | 2256 | static void do_kvm_cpu_synchronize_post_reset(CPUState *cpu, run_on_cpu_data arg) |
ea375f9a | 2257 | { |
20d695a9 | 2258 | kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE); |
99f31832 | 2259 | cpu->vcpu_dirty = false; |
ea375f9a JK |
2260 | } |
2261 | ||
c8e2085d DH |
2262 | void kvm_cpu_synchronize_post_reset(CPUState *cpu) |
2263 | { | |
14e6fe12 | 2264 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_reset, RUN_ON_CPU_NULL); |
c8e2085d DH |
2265 | } |
2266 | ||
14e6fe12 | 2267 | static void do_kvm_cpu_synchronize_post_init(CPUState *cpu, run_on_cpu_data arg) |
ea375f9a | 2268 | { |
20d695a9 | 2269 | kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE); |
99f31832 | 2270 | cpu->vcpu_dirty = false; |
ea375f9a JK |
2271 | } |
2272 | ||
c8e2085d DH |
2273 | void kvm_cpu_synchronize_post_init(CPUState *cpu) |
2274 | { | |
14e6fe12 | 2275 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, RUN_ON_CPU_NULL); |
c8e2085d DH |
2276 | } |
2277 | ||
75e972da DG |
2278 | static void do_kvm_cpu_synchronize_pre_loadvm(CPUState *cpu, run_on_cpu_data arg) |
2279 | { | |
99f31832 | 2280 | cpu->vcpu_dirty = true; |
75e972da DG |
2281 | } |
2282 | ||
2283 | void kvm_cpu_synchronize_pre_loadvm(CPUState *cpu) | |
2284 | { | |
2285 | run_on_cpu(cpu, do_kvm_cpu_synchronize_pre_loadvm, RUN_ON_CPU_NULL); | |
2286 | } | |
2287 | ||
2ae41db2 PB |
2288 | #ifdef KVM_HAVE_MCE_INJECTION |
2289 | static __thread void *pending_sigbus_addr; | |
2290 | static __thread int pending_sigbus_code; | |
2291 | static __thread bool have_sigbus_pending; | |
2292 | #endif | |
2293 | ||
cf0f7cf9 PB |
2294 | static void kvm_cpu_kick(CPUState *cpu) |
2295 | { | |
2296 | atomic_set(&cpu->kvm_run->immediate_exit, 1); | |
2297 | } | |
2298 | ||
2299 | static void kvm_cpu_kick_self(void) | |
2300 | { | |
2301 | if (kvm_immediate_exit) { | |
2302 | kvm_cpu_kick(current_cpu); | |
2303 | } else { | |
2304 | qemu_cpu_kick_self(); | |
2305 | } | |
2306 | } | |
2307 | ||
18268b60 PB |
2308 | static void kvm_eat_signals(CPUState *cpu) |
2309 | { | |
2310 | struct timespec ts = { 0, 0 }; | |
2311 | siginfo_t siginfo; | |
2312 | sigset_t waitset; | |
2313 | sigset_t chkset; | |
2314 | int r; | |
2315 | ||
cf0f7cf9 PB |
2316 | if (kvm_immediate_exit) { |
2317 | atomic_set(&cpu->kvm_run->immediate_exit, 0); | |
2318 | /* Write kvm_run->immediate_exit before the cpu->exit_request | |
2319 | * write in kvm_cpu_exec. | |
2320 | */ | |
2321 | smp_wmb(); | |
2322 | return; | |
2323 | } | |
2324 | ||
18268b60 PB |
2325 | sigemptyset(&waitset); |
2326 | sigaddset(&waitset, SIG_IPI); | |
2327 | ||
2328 | do { | |
2329 | r = sigtimedwait(&waitset, &siginfo, &ts); | |
2330 | if (r == -1 && !(errno == EAGAIN || errno == EINTR)) { | |
2331 | perror("sigtimedwait"); | |
2332 | exit(1); | |
2333 | } | |
2334 | ||
2335 | r = sigpending(&chkset); | |
2336 | if (r == -1) { | |
2337 | perror("sigpending"); | |
2338 | exit(1); | |
2339 | } | |
2340 | } while (sigismember(&chkset, SIG_IPI)); | |
2341 | } | |
2342 | ||
1458c363 | 2343 | int kvm_cpu_exec(CPUState *cpu) |
05330448 | 2344 | { |
f7575c96 | 2345 | struct kvm_run *run = cpu->kvm_run; |
7cbb533f | 2346 | int ret, run_ret; |
05330448 | 2347 | |
8c0d577e | 2348 | DPRINTF("kvm_cpu_exec()\n"); |
05330448 | 2349 | |
20d695a9 | 2350 | if (kvm_arch_process_async_events(cpu)) { |
c5c6679d | 2351 | atomic_set(&cpu->exit_request, 0); |
6792a57b | 2352 | return EXCP_HLT; |
9ccfac9e | 2353 | } |
0af691d7 | 2354 | |
4b8523ee | 2355 | qemu_mutex_unlock_iothread(); |
1d78a3c3 | 2356 | cpu_exec_start(cpu); |
4b8523ee | 2357 | |
9ccfac9e | 2358 | do { |
4c663752 PB |
2359 | MemTxAttrs attrs; |
2360 | ||
99f31832 | 2361 | if (cpu->vcpu_dirty) { |
20d695a9 | 2362 | kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE); |
99f31832 | 2363 | cpu->vcpu_dirty = false; |
4c0960c0 AK |
2364 | } |
2365 | ||
20d695a9 | 2366 | kvm_arch_pre_run(cpu, run); |
c5c6679d | 2367 | if (atomic_read(&cpu->exit_request)) { |
9ccfac9e JK |
2368 | DPRINTF("interrupt exit requested\n"); |
2369 | /* | |
2370 | * KVM requires us to reenter the kernel after IO exits to complete | |
2371 | * instruction emulation. This self-signal will ensure that we | |
2372 | * leave ASAP again. | |
2373 | */ | |
cf0f7cf9 | 2374 | kvm_cpu_kick_self(); |
9ccfac9e | 2375 | } |
9ccfac9e | 2376 | |
cf0f7cf9 PB |
2377 | /* Read cpu->exit_request before KVM_RUN reads run->immediate_exit. |
2378 | * Matching barrier in kvm_eat_signals. | |
2379 | */ | |
2380 | smp_rmb(); | |
2381 | ||
1bc22652 | 2382 | run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0); |
9ccfac9e | 2383 | |
4c663752 | 2384 | attrs = kvm_arch_post_run(cpu, run); |
05330448 | 2385 | |
2ae41db2 PB |
2386 | #ifdef KVM_HAVE_MCE_INJECTION |
2387 | if (unlikely(have_sigbus_pending)) { | |
2388 | qemu_mutex_lock_iothread(); | |
2389 | kvm_arch_on_sigbus_vcpu(cpu, pending_sigbus_code, | |
2390 | pending_sigbus_addr); | |
2391 | have_sigbus_pending = false; | |
2392 | qemu_mutex_unlock_iothread(); | |
2393 | } | |
2394 | #endif | |
2395 | ||
7cbb533f | 2396 | if (run_ret < 0) { |
dc77d341 JK |
2397 | if (run_ret == -EINTR || run_ret == -EAGAIN) { |
2398 | DPRINTF("io window exit\n"); | |
18268b60 | 2399 | kvm_eat_signals(cpu); |
d73cd8f4 | 2400 | ret = EXCP_INTERRUPT; |
dc77d341 JK |
2401 | break; |
2402 | } | |
7b011fbc ME |
2403 | fprintf(stderr, "error: kvm run failed %s\n", |
2404 | strerror(-run_ret)); | |
dae02ba5 LV |
2405 | #ifdef TARGET_PPC |
2406 | if (run_ret == -EBUSY) { | |
2407 | fprintf(stderr, | |
2408 | "This is probably because your SMT is enabled.\n" | |
2409 | "VCPU can only run on primary threads with all " | |
2410 | "secondary threads offline.\n"); | |
2411 | } | |
2412 | #endif | |
a85e130e PB |
2413 | ret = -1; |
2414 | break; | |
05330448 AL |
2415 | } |
2416 | ||
b76ac80a | 2417 | trace_kvm_run_exit(cpu->cpu_index, run->exit_reason); |
05330448 AL |
2418 | switch (run->exit_reason) { |
2419 | case KVM_EXIT_IO: | |
8c0d577e | 2420 | DPRINTF("handle_io\n"); |
80b7d2ef | 2421 | /* Called outside BQL */ |
4c663752 | 2422 | kvm_handle_io(run->io.port, attrs, |
b30e93e9 JK |
2423 | (uint8_t *)run + run->io.data_offset, |
2424 | run->io.direction, | |
2425 | run->io.size, | |
2426 | run->io.count); | |
d73cd8f4 | 2427 | ret = 0; |
05330448 AL |
2428 | break; |
2429 | case KVM_EXIT_MMIO: | |
8c0d577e | 2430 | DPRINTF("handle_mmio\n"); |
de7ea885 | 2431 | /* Called outside BQL */ |
4c663752 PB |
2432 | address_space_rw(&address_space_memory, |
2433 | run->mmio.phys_addr, attrs, | |
2434 | run->mmio.data, | |
2435 | run->mmio.len, | |
2436 | run->mmio.is_write); | |
d73cd8f4 | 2437 | ret = 0; |
05330448 AL |
2438 | break; |
2439 | case KVM_EXIT_IRQ_WINDOW_OPEN: | |
8c0d577e | 2440 | DPRINTF("irq_window_open\n"); |
d73cd8f4 | 2441 | ret = EXCP_INTERRUPT; |
05330448 AL |
2442 | break; |
2443 | case KVM_EXIT_SHUTDOWN: | |
8c0d577e | 2444 | DPRINTF("shutdown\n"); |
cf83f140 | 2445 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
d73cd8f4 | 2446 | ret = EXCP_INTERRUPT; |
05330448 AL |
2447 | break; |
2448 | case KVM_EXIT_UNKNOWN: | |
bb44e0d1 JK |
2449 | fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", |
2450 | (uint64_t)run->hw.hardware_exit_reason); | |
73aaec4a | 2451 | ret = -1; |
05330448 | 2452 | break; |
7c80eef8 | 2453 | case KVM_EXIT_INTERNAL_ERROR: |
5326ab55 | 2454 | ret = kvm_handle_internal_error(cpu, run); |
7c80eef8 | 2455 | break; |
99040447 PS |
2456 | case KVM_EXIT_SYSTEM_EVENT: |
2457 | switch (run->system_event.type) { | |
2458 | case KVM_SYSTEM_EVENT_SHUTDOWN: | |
cf83f140 | 2459 | qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); |
99040447 PS |
2460 | ret = EXCP_INTERRUPT; |
2461 | break; | |
2462 | case KVM_SYSTEM_EVENT_RESET: | |
cf83f140 | 2463 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
99040447 PS |
2464 | ret = EXCP_INTERRUPT; |
2465 | break; | |
7c207b90 | 2466 | case KVM_SYSTEM_EVENT_CRASH: |
d187e08d | 2467 | kvm_cpu_synchronize_state(cpu); |
7c207b90 | 2468 | qemu_mutex_lock_iothread(); |
c86f106b | 2469 | qemu_system_guest_panicked(cpu_get_crash_info(cpu)); |
7c207b90 AS |
2470 | qemu_mutex_unlock_iothread(); |
2471 | ret = 0; | |
2472 | break; | |
99040447 PS |
2473 | default: |
2474 | DPRINTF("kvm_arch_handle_exit\n"); | |
2475 | ret = kvm_arch_handle_exit(cpu, run); | |
2476 | break; | |
2477 | } | |
2478 | break; | |
05330448 | 2479 | default: |
8c0d577e | 2480 | DPRINTF("kvm_arch_handle_exit\n"); |
20d695a9 | 2481 | ret = kvm_arch_handle_exit(cpu, run); |
05330448 AL |
2482 | break; |
2483 | } | |
d73cd8f4 | 2484 | } while (ret == 0); |
05330448 | 2485 | |
1d78a3c3 | 2486 | cpu_exec_end(cpu); |
4b8523ee JK |
2487 | qemu_mutex_lock_iothread(); |
2488 | ||
73aaec4a | 2489 | if (ret < 0) { |
90c84c56 | 2490 | cpu_dump_state(cpu, stderr, CPU_DUMP_CODE); |
0461d5a6 | 2491 | vm_stop(RUN_STATE_INTERNAL_ERROR); |
becfc390 AL |
2492 | } |
2493 | ||
c5c6679d | 2494 | atomic_set(&cpu->exit_request, 0); |
05330448 AL |
2495 | return ret; |
2496 | } | |
2497 | ||
984b5181 | 2498 | int kvm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
2499 | { |
2500 | int ret; | |
984b5181 AL |
2501 | void *arg; |
2502 | va_list ap; | |
05330448 | 2503 | |
984b5181 AL |
2504 | va_start(ap, type); |
2505 | arg = va_arg(ap, void *); | |
2506 | va_end(ap); | |
2507 | ||
9c775729 | 2508 | trace_kvm_ioctl(type, arg); |
984b5181 | 2509 | ret = ioctl(s->fd, type, arg); |
a426e122 | 2510 | if (ret == -1) { |
05330448 | 2511 | ret = -errno; |
a426e122 | 2512 | } |
05330448 AL |
2513 | return ret; |
2514 | } | |
2515 | ||
984b5181 | 2516 | int kvm_vm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
2517 | { |
2518 | int ret; | |
984b5181 AL |
2519 | void *arg; |
2520 | va_list ap; | |
2521 | ||
2522 | va_start(ap, type); | |
2523 | arg = va_arg(ap, void *); | |
2524 | va_end(ap); | |
05330448 | 2525 | |
9c775729 | 2526 | trace_kvm_vm_ioctl(type, arg); |
984b5181 | 2527 | ret = ioctl(s->vmfd, type, arg); |
a426e122 | 2528 | if (ret == -1) { |
05330448 | 2529 | ret = -errno; |
a426e122 | 2530 | } |
05330448 AL |
2531 | return ret; |
2532 | } | |
2533 | ||
1bc22652 | 2534 | int kvm_vcpu_ioctl(CPUState *cpu, int type, ...) |
05330448 AL |
2535 | { |
2536 | int ret; | |
984b5181 AL |
2537 | void *arg; |
2538 | va_list ap; | |
2539 | ||
2540 | va_start(ap, type); | |
2541 | arg = va_arg(ap, void *); | |
2542 | va_end(ap); | |
05330448 | 2543 | |
9c775729 | 2544 | trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg); |
8737c51c | 2545 | ret = ioctl(cpu->kvm_fd, type, arg); |
a426e122 | 2546 | if (ret == -1) { |
05330448 | 2547 | ret = -errno; |
a426e122 | 2548 | } |
05330448 AL |
2549 | return ret; |
2550 | } | |
bd322087 | 2551 | |
0a6a7cca CD |
2552 | int kvm_device_ioctl(int fd, int type, ...) |
2553 | { | |
2554 | int ret; | |
2555 | void *arg; | |
2556 | va_list ap; | |
2557 | ||
2558 | va_start(ap, type); | |
2559 | arg = va_arg(ap, void *); | |
2560 | va_end(ap); | |
2561 | ||
2562 | trace_kvm_device_ioctl(fd, type, arg); | |
2563 | ret = ioctl(fd, type, arg); | |
2564 | if (ret == -1) { | |
2565 | ret = -errno; | |
2566 | } | |
2567 | return ret; | |
2568 | } | |
2569 | ||
d0a073a1 DD |
2570 | int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr) |
2571 | { | |
2572 | int ret; | |
2573 | struct kvm_device_attr attribute = { | |
2574 | .group = group, | |
2575 | .attr = attr, | |
2576 | }; | |
2577 | ||
2578 | if (!kvm_vm_attributes_allowed) { | |
2579 | return 0; | |
2580 | } | |
2581 | ||
2582 | ret = kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attribute); | |
2583 | /* kvm returns 0 on success for HAS_DEVICE_ATTR */ | |
2584 | return ret ? 0 : 1; | |
2585 | } | |
2586 | ||
4b3cfe72 PF |
2587 | int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr) |
2588 | { | |
2589 | struct kvm_device_attr attribute = { | |
2590 | .group = group, | |
2591 | .attr = attr, | |
2592 | .flags = 0, | |
2593 | }; | |
2594 | ||
2595 | return kvm_device_ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute) ? 0 : 1; | |
2596 | } | |
2597 | ||
556969e9 EA |
2598 | int kvm_device_access(int fd, int group, uint64_t attr, |
2599 | void *val, bool write, Error **errp) | |
4b3cfe72 PF |
2600 | { |
2601 | struct kvm_device_attr kvmattr; | |
2602 | int err; | |
2603 | ||
2604 | kvmattr.flags = 0; | |
2605 | kvmattr.group = group; | |
2606 | kvmattr.attr = attr; | |
2607 | kvmattr.addr = (uintptr_t)val; | |
2608 | ||
2609 | err = kvm_device_ioctl(fd, | |
2610 | write ? KVM_SET_DEVICE_ATTR : KVM_GET_DEVICE_ATTR, | |
2611 | &kvmattr); | |
2612 | if (err < 0) { | |
556969e9 EA |
2613 | error_setg_errno(errp, -err, |
2614 | "KVM_%s_DEVICE_ATTR failed: Group %d " | |
2615 | "attr 0x%016" PRIx64, | |
2616 | write ? "SET" : "GET", group, attr); | |
4b3cfe72 | 2617 | } |
556969e9 | 2618 | return err; |
4b3cfe72 PF |
2619 | } |
2620 | ||
62dd4eda | 2621 | bool kvm_has_sync_mmu(void) |
bd322087 | 2622 | { |
62dd4eda | 2623 | return kvm_state->sync_mmu; |
bd322087 | 2624 | } |
e22a25c9 | 2625 | |
a0fb002c JK |
2626 | int kvm_has_vcpu_events(void) |
2627 | { | |
2628 | return kvm_state->vcpu_events; | |
2629 | } | |
2630 | ||
b0b1d690 JK |
2631 | int kvm_has_robust_singlestep(void) |
2632 | { | |
2633 | return kvm_state->robust_singlestep; | |
2634 | } | |
2635 | ||
ff44f1a3 JK |
2636 | int kvm_has_debugregs(void) |
2637 | { | |
2638 | return kvm_state->debugregs; | |
2639 | } | |
2640 | ||
ebbfef2f LA |
2641 | int kvm_max_nested_state_length(void) |
2642 | { | |
2643 | return kvm_state->max_nested_state_len; | |
2644 | } | |
2645 | ||
d2f2b8a7 SH |
2646 | int kvm_has_many_ioeventfds(void) |
2647 | { | |
2648 | if (!kvm_enabled()) { | |
2649 | return 0; | |
2650 | } | |
2651 | return kvm_state->many_ioeventfds; | |
2652 | } | |
2653 | ||
84b058d7 JK |
2654 | int kvm_has_gsi_routing(void) |
2655 | { | |
a9c5eb0d | 2656 | #ifdef KVM_CAP_IRQ_ROUTING |
84b058d7 | 2657 | return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING); |
a9c5eb0d AG |
2658 | #else |
2659 | return false; | |
2660 | #endif | |
84b058d7 JK |
2661 | } |
2662 | ||
3ab73842 JK |
2663 | int kvm_has_intx_set_mask(void) |
2664 | { | |
2665 | return kvm_state->intx_set_mask; | |
2666 | } | |
2667 | ||
5d721b78 AG |
2668 | bool kvm_arm_supports_user_irq(void) |
2669 | { | |
2670 | return kvm_check_extension(kvm_state, KVM_CAP_ARM_USER_IRQ); | |
2671 | } | |
2672 | ||
e22a25c9 | 2673 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
a60f24b5 | 2674 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu, |
e22a25c9 AL |
2675 | target_ulong pc) |
2676 | { | |
2677 | struct kvm_sw_breakpoint *bp; | |
2678 | ||
a60f24b5 | 2679 | QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) { |
a426e122 | 2680 | if (bp->pc == pc) { |
e22a25c9 | 2681 | return bp; |
a426e122 | 2682 | } |
e22a25c9 AL |
2683 | } |
2684 | return NULL; | |
2685 | } | |
2686 | ||
a60f24b5 | 2687 | int kvm_sw_breakpoints_active(CPUState *cpu) |
e22a25c9 | 2688 | { |
a60f24b5 | 2689 | return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints); |
e22a25c9 AL |
2690 | } |
2691 | ||
452e4751 GC |
2692 | struct kvm_set_guest_debug_data { |
2693 | struct kvm_guest_debug dbg; | |
452e4751 GC |
2694 | int err; |
2695 | }; | |
2696 | ||
14e6fe12 | 2697 | static void kvm_invoke_set_guest_debug(CPUState *cpu, run_on_cpu_data data) |
452e4751 | 2698 | { |
14e6fe12 PB |
2699 | struct kvm_set_guest_debug_data *dbg_data = |
2700 | (struct kvm_set_guest_debug_data *) data.host_ptr; | |
b3807725 | 2701 | |
3c0ed2a3 | 2702 | dbg_data->err = kvm_vcpu_ioctl(cpu, KVM_SET_GUEST_DEBUG, |
a60f24b5 | 2703 | &dbg_data->dbg); |
452e4751 GC |
2704 | } |
2705 | ||
38e478ec | 2706 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 | 2707 | { |
452e4751 | 2708 | struct kvm_set_guest_debug_data data; |
e22a25c9 | 2709 | |
b0b1d690 | 2710 | data.dbg.control = reinject_trap; |
e22a25c9 | 2711 | |
ed2803da | 2712 | if (cpu->singlestep_enabled) { |
b0b1d690 JK |
2713 | data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
2714 | } | |
20d695a9 | 2715 | kvm_arch_update_guest_debug(cpu, &data.dbg); |
e22a25c9 | 2716 | |
14e6fe12 PB |
2717 | run_on_cpu(cpu, kvm_invoke_set_guest_debug, |
2718 | RUN_ON_CPU_HOST_PTR(&data)); | |
452e4751 | 2719 | return data.err; |
e22a25c9 AL |
2720 | } |
2721 | ||
62278814 | 2722 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2723 | target_ulong len, int type) |
2724 | { | |
2725 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
2726 | int err; |
2727 | ||
2728 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 2729 | bp = kvm_find_sw_breakpoint(cpu, addr); |
e22a25c9 AL |
2730 | if (bp) { |
2731 | bp->use_count++; | |
2732 | return 0; | |
2733 | } | |
2734 | ||
7267c094 | 2735 | bp = g_malloc(sizeof(struct kvm_sw_breakpoint)); |
e22a25c9 AL |
2736 | bp->pc = addr; |
2737 | bp->use_count = 1; | |
80b7cd73 | 2738 | err = kvm_arch_insert_sw_breakpoint(cpu, bp); |
e22a25c9 | 2739 | if (err) { |
7267c094 | 2740 | g_free(bp); |
e22a25c9 AL |
2741 | return err; |
2742 | } | |
2743 | ||
80b7cd73 | 2744 | QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
e22a25c9 AL |
2745 | } else { |
2746 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); | |
a426e122 | 2747 | if (err) { |
e22a25c9 | 2748 | return err; |
a426e122 | 2749 | } |
e22a25c9 AL |
2750 | } |
2751 | ||
bdc44640 | 2752 | CPU_FOREACH(cpu) { |
38e478ec | 2753 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 2754 | if (err) { |
e22a25c9 | 2755 | return err; |
a426e122 | 2756 | } |
e22a25c9 AL |
2757 | } |
2758 | return 0; | |
2759 | } | |
2760 | ||
62278814 | 2761 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2762 | target_ulong len, int type) |
2763 | { | |
2764 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
2765 | int err; |
2766 | ||
2767 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 2768 | bp = kvm_find_sw_breakpoint(cpu, addr); |
a426e122 | 2769 | if (!bp) { |
e22a25c9 | 2770 | return -ENOENT; |
a426e122 | 2771 | } |
e22a25c9 AL |
2772 | |
2773 | if (bp->use_count > 1) { | |
2774 | bp->use_count--; | |
2775 | return 0; | |
2776 | } | |
2777 | ||
80b7cd73 | 2778 | err = kvm_arch_remove_sw_breakpoint(cpu, bp); |
a426e122 | 2779 | if (err) { |
e22a25c9 | 2780 | return err; |
a426e122 | 2781 | } |
e22a25c9 | 2782 | |
80b7cd73 | 2783 | QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
7267c094 | 2784 | g_free(bp); |
e22a25c9 AL |
2785 | } else { |
2786 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); | |
a426e122 | 2787 | if (err) { |
e22a25c9 | 2788 | return err; |
a426e122 | 2789 | } |
e22a25c9 AL |
2790 | } |
2791 | ||
bdc44640 | 2792 | CPU_FOREACH(cpu) { |
38e478ec | 2793 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 2794 | if (err) { |
e22a25c9 | 2795 | return err; |
a426e122 | 2796 | } |
e22a25c9 AL |
2797 | } |
2798 | return 0; | |
2799 | } | |
2800 | ||
1d5791f4 | 2801 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
2802 | { |
2803 | struct kvm_sw_breakpoint *bp, *next; | |
80b7cd73 | 2804 | KVMState *s = cpu->kvm_state; |
dc54e252 | 2805 | CPUState *tmpcpu; |
e22a25c9 | 2806 | |
72cf2d4f | 2807 | QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
80b7cd73 | 2808 | if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) { |
e22a25c9 | 2809 | /* Try harder to find a CPU that currently sees the breakpoint. */ |
dc54e252 CG |
2810 | CPU_FOREACH(tmpcpu) { |
2811 | if (kvm_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) { | |
e22a25c9 | 2812 | break; |
a426e122 | 2813 | } |
e22a25c9 AL |
2814 | } |
2815 | } | |
78021d6d JK |
2816 | QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry); |
2817 | g_free(bp); | |
e22a25c9 AL |
2818 | } |
2819 | kvm_arch_remove_all_hw_breakpoints(); | |
2820 | ||
bdc44640 | 2821 | CPU_FOREACH(cpu) { |
38e478ec | 2822 | kvm_update_guest_debug(cpu, 0); |
a426e122 | 2823 | } |
e22a25c9 AL |
2824 | } |
2825 | ||
2826 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ | |
2827 | ||
38e478ec | 2828 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 AL |
2829 | { |
2830 | return -EINVAL; | |
2831 | } | |
2832 | ||
62278814 | 2833 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2834 | target_ulong len, int type) |
2835 | { | |
2836 | return -EINVAL; | |
2837 | } | |
2838 | ||
62278814 | 2839 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2840 | target_ulong len, int type) |
2841 | { | |
2842 | return -EINVAL; | |
2843 | } | |
2844 | ||
1d5791f4 | 2845 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
2846 | { |
2847 | } | |
2848 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ | |
cc84de95 | 2849 | |
18268b60 | 2850 | static int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset) |
cc84de95 | 2851 | { |
aed6efb9 | 2852 | KVMState *s = kvm_state; |
cc84de95 MT |
2853 | struct kvm_signal_mask *sigmask; |
2854 | int r; | |
2855 | ||
7267c094 | 2856 | sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset)); |
cc84de95 | 2857 | |
aed6efb9 | 2858 | sigmask->len = s->sigmask_len; |
cc84de95 | 2859 | memcpy(sigmask->sigset, sigset, sizeof(*sigset)); |
1bc22652 | 2860 | r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask); |
7267c094 | 2861 | g_free(sigmask); |
cc84de95 MT |
2862 | |
2863 | return r; | |
2864 | } | |
4d39892c | 2865 | |
cf0f7cf9 | 2866 | static void kvm_ipi_signal(int sig) |
18268b60 | 2867 | { |
cf0f7cf9 PB |
2868 | if (current_cpu) { |
2869 | assert(kvm_immediate_exit); | |
2870 | kvm_cpu_kick(current_cpu); | |
2871 | } | |
18268b60 PB |
2872 | } |
2873 | ||
2874 | void kvm_init_cpu_signals(CPUState *cpu) | |
2875 | { | |
2876 | int r; | |
2877 | sigset_t set; | |
2878 | struct sigaction sigact; | |
2879 | ||
2880 | memset(&sigact, 0, sizeof(sigact)); | |
cf0f7cf9 | 2881 | sigact.sa_handler = kvm_ipi_signal; |
18268b60 PB |
2882 | sigaction(SIG_IPI, &sigact, NULL); |
2883 | ||
2884 | pthread_sigmask(SIG_BLOCK, NULL, &set); | |
2885 | #if defined KVM_HAVE_MCE_INJECTION | |
2886 | sigdelset(&set, SIGBUS); | |
2887 | pthread_sigmask(SIG_SETMASK, &set, NULL); | |
2888 | #endif | |
2889 | sigdelset(&set, SIG_IPI); | |
cf0f7cf9 PB |
2890 | if (kvm_immediate_exit) { |
2891 | r = pthread_sigmask(SIG_SETMASK, &set, NULL); | |
2892 | } else { | |
2893 | r = kvm_set_signal_mask(cpu, &set); | |
2894 | } | |
18268b60 PB |
2895 | if (r) { |
2896 | fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r)); | |
2897 | exit(1); | |
2898 | } | |
2899 | } | |
2900 | ||
2ae41db2 | 2901 | /* Called asynchronously in VCPU thread. */ |
290adf38 | 2902 | int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) |
a1b87fe0 | 2903 | { |
2ae41db2 PB |
2904 | #ifdef KVM_HAVE_MCE_INJECTION |
2905 | if (have_sigbus_pending) { | |
2906 | return 1; | |
2907 | } | |
2908 | have_sigbus_pending = true; | |
2909 | pending_sigbus_addr = addr; | |
2910 | pending_sigbus_code = code; | |
2911 | atomic_set(&cpu->exit_request, 1); | |
2912 | return 0; | |
2913 | #else | |
2914 | return 1; | |
2915 | #endif | |
a1b87fe0 JK |
2916 | } |
2917 | ||
2ae41db2 | 2918 | /* Called synchronously (via signalfd) in main thread. */ |
a1b87fe0 JK |
2919 | int kvm_on_sigbus(int code, void *addr) |
2920 | { | |
2ae41db2 | 2921 | #ifdef KVM_HAVE_MCE_INJECTION |
4d39892c PB |
2922 | /* Action required MCE kills the process if SIGBUS is blocked. Because |
2923 | * that's what happens in the I/O thread, where we handle MCE via signalfd, | |
2924 | * we can only get action optional here. | |
2925 | */ | |
2926 | assert(code != BUS_MCEERR_AR); | |
2927 | kvm_arch_on_sigbus_vcpu(first_cpu, code, addr); | |
2928 | return 0; | |
2ae41db2 PB |
2929 | #else |
2930 | return 1; | |
2931 | #endif | |
a1b87fe0 | 2932 | } |
0a6a7cca CD |
2933 | |
2934 | int kvm_create_device(KVMState *s, uint64_t type, bool test) | |
2935 | { | |
2936 | int ret; | |
2937 | struct kvm_create_device create_dev; | |
2938 | ||
2939 | create_dev.type = type; | |
2940 | create_dev.fd = -1; | |
2941 | create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0; | |
2942 | ||
2943 | if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) { | |
2944 | return -ENOTSUP; | |
2945 | } | |
2946 | ||
2947 | ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev); | |
2948 | if (ret) { | |
2949 | return ret; | |
2950 | } | |
2951 | ||
2952 | return test ? 0 : create_dev.fd; | |
2953 | } | |
ada4135f | 2954 | |
29039acf PX |
2955 | bool kvm_device_supported(int vmfd, uint64_t type) |
2956 | { | |
2957 | struct kvm_create_device create_dev = { | |
2958 | .type = type, | |
2959 | .fd = -1, | |
2960 | .flags = KVM_CREATE_DEVICE_TEST, | |
2961 | }; | |
2962 | ||
2963 | if (ioctl(vmfd, KVM_CHECK_EXTENSION, KVM_CAP_DEVICE_CTRL) <= 0) { | |
2964 | return false; | |
2965 | } | |
2966 | ||
2967 | return (ioctl(vmfd, KVM_CREATE_DEVICE, &create_dev) >= 0); | |
2968 | } | |
2969 | ||
ada4135f CH |
2970 | int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source) |
2971 | { | |
2972 | struct kvm_one_reg reg; | |
2973 | int r; | |
2974 | ||
2975 | reg.id = id; | |
2976 | reg.addr = (uintptr_t) source; | |
2977 | r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); | |
2978 | if (r) { | |
844a3d34 | 2979 | trace_kvm_failed_reg_set(id, strerror(-r)); |
ada4135f CH |
2980 | } |
2981 | return r; | |
2982 | } | |
2983 | ||
2984 | int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target) | |
2985 | { | |
2986 | struct kvm_one_reg reg; | |
2987 | int r; | |
2988 | ||
2989 | reg.id = id; | |
2990 | reg.addr = (uintptr_t) target; | |
2991 | r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); | |
2992 | if (r) { | |
844a3d34 | 2993 | trace_kvm_failed_reg_get(id, strerror(-r)); |
ada4135f CH |
2994 | } |
2995 | return r; | |
2996 | } | |
782c3f29 | 2997 | |
8072aae3 AK |
2998 | static bool kvm_accel_has_memory(MachineState *ms, AddressSpace *as, |
2999 | hwaddr start_addr, hwaddr size) | |
3000 | { | |
3001 | KVMState *kvm = KVM_STATE(ms->accelerator); | |
3002 | int i; | |
3003 | ||
3004 | for (i = 0; i < kvm->nr_as; ++i) { | |
3005 | if (kvm->as[i].as == as && kvm->as[i].ml) { | |
023ae9a8 | 3006 | size = MIN(kvm_max_slot_size, size); |
8072aae3 AK |
3007 | return NULL != kvm_lookup_matching_slot(kvm->as[i].ml, |
3008 | start_addr, size); | |
3009 | } | |
3010 | } | |
3011 | ||
3012 | return false; | |
3013 | } | |
3014 | ||
23b0898e PB |
3015 | static void kvm_get_kvm_shadow_mem(Object *obj, Visitor *v, |
3016 | const char *name, void *opaque, | |
3017 | Error **errp) | |
3018 | { | |
3019 | KVMState *s = KVM_STATE(obj); | |
3020 | int64_t value = s->kvm_shadow_mem; | |
3021 | ||
3022 | visit_type_int(v, name, &value, errp); | |
3023 | } | |
3024 | ||
3025 | static void kvm_set_kvm_shadow_mem(Object *obj, Visitor *v, | |
3026 | const char *name, void *opaque, | |
3027 | Error **errp) | |
3028 | { | |
3029 | KVMState *s = KVM_STATE(obj); | |
3030 | Error *error = NULL; | |
3031 | int64_t value; | |
3032 | ||
3033 | visit_type_int(v, name, &value, &error); | |
3034 | if (error) { | |
3035 | error_propagate(errp, error); | |
3036 | return; | |
3037 | } | |
3038 | ||
3039 | s->kvm_shadow_mem = value; | |
3040 | } | |
3041 | ||
11bc4a13 PB |
3042 | static void kvm_set_kernel_irqchip(Object *obj, Visitor *v, |
3043 | const char *name, void *opaque, | |
3044 | Error **errp) | |
3045 | { | |
3046 | Error *err = NULL; | |
3047 | KVMState *s = KVM_STATE(obj); | |
3048 | OnOffSplit mode; | |
3049 | ||
3050 | visit_type_OnOffSplit(v, name, &mode, &err); | |
3051 | if (err) { | |
3052 | error_propagate(errp, err); | |
3053 | return; | |
3054 | } else { | |
3055 | switch (mode) { | |
3056 | case ON_OFF_SPLIT_ON: | |
3057 | s->kernel_irqchip_allowed = true; | |
3058 | s->kernel_irqchip_required = true; | |
d1972be1 | 3059 | s->kernel_irqchip_split = ON_OFF_AUTO_OFF; |
11bc4a13 PB |
3060 | break; |
3061 | case ON_OFF_SPLIT_OFF: | |
3062 | s->kernel_irqchip_allowed = false; | |
3063 | s->kernel_irqchip_required = false; | |
d1972be1 | 3064 | s->kernel_irqchip_split = ON_OFF_AUTO_OFF; |
11bc4a13 PB |
3065 | break; |
3066 | case ON_OFF_SPLIT_SPLIT: | |
3067 | s->kernel_irqchip_allowed = true; | |
3068 | s->kernel_irqchip_required = true; | |
d1972be1 | 3069 | s->kernel_irqchip_split = ON_OFF_AUTO_ON; |
11bc4a13 PB |
3070 | break; |
3071 | default: | |
3072 | /* The value was checked in visit_type_OnOffSplit() above. If | |
3073 | * we get here, then something is wrong in QEMU. | |
3074 | */ | |
3075 | abort(); | |
3076 | } | |
3077 | } | |
3078 | } | |
3079 | ||
4376c40d PB |
3080 | bool kvm_kernel_irqchip_allowed(void) |
3081 | { | |
11bc4a13 | 3082 | return kvm_state->kernel_irqchip_allowed; |
4376c40d PB |
3083 | } |
3084 | ||
3085 | bool kvm_kernel_irqchip_required(void) | |
3086 | { | |
11bc4a13 | 3087 | return kvm_state->kernel_irqchip_required; |
4376c40d PB |
3088 | } |
3089 | ||
3090 | bool kvm_kernel_irqchip_split(void) | |
3091 | { | |
d1972be1 | 3092 | return kvm_state->kernel_irqchip_split == ON_OFF_AUTO_ON; |
4376c40d PB |
3093 | } |
3094 | ||
23b0898e PB |
3095 | static void kvm_accel_instance_init(Object *obj) |
3096 | { | |
3097 | KVMState *s = KVM_STATE(obj); | |
3098 | ||
3099 | s->kvm_shadow_mem = -1; | |
d1972be1 XL |
3100 | s->kernel_irqchip_allowed = true; |
3101 | s->kernel_irqchip_split = ON_OFF_AUTO_AUTO; | |
23b0898e PB |
3102 | } |
3103 | ||
782c3f29 EH |
3104 | static void kvm_accel_class_init(ObjectClass *oc, void *data) |
3105 | { | |
3106 | AccelClass *ac = ACCEL_CLASS(oc); | |
3107 | ac->name = "KVM"; | |
0d15da8e | 3108 | ac->init_machine = kvm_init; |
8072aae3 | 3109 | ac->has_memory = kvm_accel_has_memory; |
782c3f29 | 3110 | ac->allowed = &kvm_allowed; |
23b0898e | 3111 | |
11bc4a13 PB |
3112 | object_class_property_add(oc, "kernel-irqchip", "on|off|split", |
3113 | NULL, kvm_set_kernel_irqchip, | |
d2623129 | 3114 | NULL, NULL); |
11bc4a13 | 3115 | object_class_property_set_description(oc, "kernel-irqchip", |
7eecec7d | 3116 | "Configure KVM in-kernel irqchip"); |
11bc4a13 | 3117 | |
23b0898e PB |
3118 | object_class_property_add(oc, "kvm-shadow-mem", "int", |
3119 | kvm_get_kvm_shadow_mem, kvm_set_kvm_shadow_mem, | |
d2623129 | 3120 | NULL, NULL); |
23b0898e | 3121 | object_class_property_set_description(oc, "kvm-shadow-mem", |
7eecec7d | 3122 | "KVM shadow MMU size"); |
782c3f29 EH |
3123 | } |
3124 | ||
3125 | static const TypeInfo kvm_accel_type = { | |
3126 | .name = TYPE_KVM_ACCEL, | |
3127 | .parent = TYPE_ACCEL, | |
23b0898e | 3128 | .instance_init = kvm_accel_instance_init, |
782c3f29 | 3129 | .class_init = kvm_accel_class_init, |
fc02086b | 3130 | .instance_size = sizeof(KVMState), |
782c3f29 EH |
3131 | }; |
3132 | ||
3133 | static void kvm_type_init(void) | |
3134 | { | |
3135 | type_register_static(&kvm_accel_type); | |
3136 | } | |
3137 | ||
3138 | type_init(kvm_type_init); |