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Commit | Line | Data |
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05330448 AL |
1 | /* |
2 | * QEMU KVM support | |
3 | * | |
4 | * Copyright IBM, Corp. 2008 | |
5832d1f2 | 5 | * Red Hat, Inc. 2008 |
05330448 AL |
6 | * |
7 | * Authors: | |
8 | * Anthony Liguori <aliguori@us.ibm.com> | |
5832d1f2 | 9 | * Glauber Costa <gcosta@redhat.com> |
05330448 AL |
10 | * |
11 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
12 | * See the COPYING file in the top-level directory. | |
13 | * | |
14 | */ | |
15 | ||
d38ea87a | 16 | #include "qemu/osdep.h" |
05330448 | 17 | #include <sys/ioctl.h> |
05330448 AL |
18 | |
19 | #include <linux/kvm.h> | |
20 | ||
1de7afc9 PB |
21 | #include "qemu/atomic.h" |
22 | #include "qemu/option.h" | |
23 | #include "qemu/config-file.h" | |
4b3cfe72 | 24 | #include "qemu/error-report.h" |
556969e9 | 25 | #include "qapi/error.h" |
d33a1810 | 26 | #include "hw/hw.h" |
a2cb15b0 | 27 | #include "hw/pci/msi.h" |
d1f6af6a | 28 | #include "hw/pci/msix.h" |
d426d9fb | 29 | #include "hw/s390x/adapter.h" |
022c62cb | 30 | #include "exec/gdbstub.h" |
8571ed35 | 31 | #include "sysemu/kvm_int.h" |
d2528bdc | 32 | #include "sysemu/cpus.h" |
1de7afc9 | 33 | #include "qemu/bswap.h" |
022c62cb | 34 | #include "exec/memory.h" |
747afd5b | 35 | #include "exec/ram_addr.h" |
022c62cb | 36 | #include "exec/address-spaces.h" |
1de7afc9 | 37 | #include "qemu/event_notifier.h" |
92229a57 | 38 | #include "trace.h" |
197e3524 | 39 | #include "hw/irq.h" |
b20e3780 | 40 | #include "sysemu/sev.h" |
f5948942 | 41 | #include "sysemu/balloon.h" |
05330448 | 42 | |
135a129a AK |
43 | #include "hw/boards.h" |
44 | ||
d2f2b8a7 SH |
45 | /* This check must be after config-host.h is included */ |
46 | #ifdef CONFIG_EVENTFD | |
47 | #include <sys/eventfd.h> | |
48 | #endif | |
49 | ||
bc92e4e9 AJ |
50 | /* KVM uses PAGE_SIZE in its definition of KVM_COALESCED_MMIO_MAX. We |
51 | * need to use the real host PAGE_SIZE, as that's what KVM will use. | |
52 | */ | |
53 | #define PAGE_SIZE getpagesize() | |
f65ed4c1 | 54 | |
05330448 AL |
55 | //#define DEBUG_KVM |
56 | ||
57 | #ifdef DEBUG_KVM | |
8c0d577e | 58 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
59 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
60 | #else | |
8c0d577e | 61 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
62 | do { } while (0) |
63 | #endif | |
64 | ||
04fa27f5 JK |
65 | #define KVM_MSI_HASHTAB_SIZE 256 |
66 | ||
4c055ab5 GZ |
67 | struct KVMParkedVcpu { |
68 | unsigned long vcpu_id; | |
69 | int kvm_fd; | |
70 | QLIST_ENTRY(KVMParkedVcpu) node; | |
71 | }; | |
72 | ||
9d1c35df | 73 | struct KVMState |
05330448 | 74 | { |
fc02086b EH |
75 | AccelState parent_obj; |
76 | ||
fb541ca5 | 77 | int nr_slots; |
05330448 AL |
78 | int fd; |
79 | int vmfd; | |
f65ed4c1 | 80 | int coalesced_mmio; |
e6d34aee | 81 | int coalesced_pio; |
62a2744c | 82 | struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; |
1cae88b9 | 83 | bool coalesced_flush_in_progress; |
a0fb002c | 84 | int vcpu_events; |
b0b1d690 | 85 | int robust_singlestep; |
ff44f1a3 | 86 | int debugregs; |
e22a25c9 | 87 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
b58deb34 | 88 | QTAILQ_HEAD(, kvm_sw_breakpoint) kvm_sw_breakpoints; |
e22a25c9 | 89 | #endif |
d2f2b8a7 | 90 | int many_ioeventfds; |
3ab73842 | 91 | int intx_set_mask; |
62dd4eda | 92 | bool sync_mmu; |
92e4b519 DG |
93 | /* The man page (and posix) say ioctl numbers are signed int, but |
94 | * they're not. Linux, glibc and *BSD all treat ioctl numbers as | |
95 | * unsigned, and treating them as signed here can break things */ | |
e333cd69 | 96 | unsigned irq_set_ioctl; |
aed6efb9 | 97 | unsigned int sigmask_len; |
197e3524 | 98 | GHashTable *gsimap; |
84b058d7 JK |
99 | #ifdef KVM_CAP_IRQ_ROUTING |
100 | struct kvm_irq_routing *irq_routes; | |
101 | int nr_allocated_irq_routes; | |
8269fb70 | 102 | unsigned long *used_gsi_bitmap; |
4e2e4e63 | 103 | unsigned int gsi_count; |
b58deb34 | 104 | QTAILQ_HEAD(, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE]; |
84b058d7 | 105 | #endif |
7bbda04c | 106 | KVMMemoryListener memory_listener; |
4c055ab5 | 107 | QLIST_HEAD(, KVMParkedVcpu) kvm_parked_vcpus; |
b20e3780 BS |
108 | |
109 | /* memory encryption */ | |
110 | void *memcrypt_handle; | |
54e89539 | 111 | int (*memcrypt_encrypt_data)(void *handle, uint8_t *ptr, uint64_t len); |
9d1c35df | 112 | }; |
05330448 | 113 | |
6a7af8cb | 114 | KVMState *kvm_state; |
3d4b2649 | 115 | bool kvm_kernel_irqchip; |
15eafc2e | 116 | bool kvm_split_irqchip; |
7ae26bd4 | 117 | bool kvm_async_interrupts_allowed; |
215e79c0 | 118 | bool kvm_halt_in_kernel_allowed; |
69e03ae6 | 119 | bool kvm_eventfds_allowed; |
cc7e0ddf | 120 | bool kvm_irqfds_allowed; |
f41389ae | 121 | bool kvm_resamplefds_allowed; |
614e41bc | 122 | bool kvm_msi_via_irqfd_allowed; |
f3e1bed8 | 123 | bool kvm_gsi_routing_allowed; |
76fe21de | 124 | bool kvm_gsi_direct_mapping; |
13eed94e | 125 | bool kvm_allowed; |
df9c8b75 | 126 | bool kvm_readonly_mem_allowed; |
d0a073a1 | 127 | bool kvm_vm_attributes_allowed; |
50bf31b9 | 128 | bool kvm_direct_msi_allowed; |
35108223 | 129 | bool kvm_ioeventfd_any_length_allowed; |
767a554a | 130 | bool kvm_msi_use_devid; |
cf0f7cf9 | 131 | static bool kvm_immediate_exit; |
05330448 | 132 | |
94a8d39a JK |
133 | static const KVMCapabilityInfo kvm_required_capabilites[] = { |
134 | KVM_CAP_INFO(USER_MEMORY), | |
135 | KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS), | |
89de4b91 | 136 | KVM_CAP_INFO(JOIN_MEMORY_REGIONS_WORKS), |
94a8d39a JK |
137 | KVM_CAP_LAST_INFO |
138 | }; | |
139 | ||
44f2e6c1 BR |
140 | int kvm_get_max_memslots(void) |
141 | { | |
142 | KVMState *s = KVM_STATE(current_machine->accelerator); | |
143 | ||
144 | return s->nr_slots; | |
145 | } | |
146 | ||
b20e3780 BS |
147 | bool kvm_memcrypt_enabled(void) |
148 | { | |
149 | if (kvm_state && kvm_state->memcrypt_handle) { | |
150 | return true; | |
151 | } | |
152 | ||
153 | return false; | |
154 | } | |
155 | ||
54e89539 BS |
156 | int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len) |
157 | { | |
158 | if (kvm_state->memcrypt_handle && | |
159 | kvm_state->memcrypt_encrypt_data) { | |
160 | return kvm_state->memcrypt_encrypt_data(kvm_state->memcrypt_handle, | |
161 | ptr, len); | |
162 | } | |
163 | ||
164 | return 1; | |
165 | } | |
166 | ||
7bbda04c | 167 | static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml) |
05330448 | 168 | { |
7bbda04c | 169 | KVMState *s = kvm_state; |
05330448 AL |
170 | int i; |
171 | ||
fb541ca5 | 172 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c PB |
173 | if (kml->slots[i].memory_size == 0) { |
174 | return &kml->slots[i]; | |
a426e122 | 175 | } |
05330448 AL |
176 | } |
177 | ||
b8865591 IM |
178 | return NULL; |
179 | } | |
180 | ||
181 | bool kvm_has_free_slot(MachineState *ms) | |
182 | { | |
7bbda04c PB |
183 | KVMState *s = KVM_STATE(ms->accelerator); |
184 | ||
185 | return kvm_get_free_slot(&s->memory_listener); | |
b8865591 IM |
186 | } |
187 | ||
7bbda04c | 188 | static KVMSlot *kvm_alloc_slot(KVMMemoryListener *kml) |
b8865591 | 189 | { |
7bbda04c | 190 | KVMSlot *slot = kvm_get_free_slot(kml); |
b8865591 IM |
191 | |
192 | if (slot) { | |
193 | return slot; | |
194 | } | |
195 | ||
d3f8d37f AL |
196 | fprintf(stderr, "%s: no free slot available\n", __func__); |
197 | abort(); | |
198 | } | |
199 | ||
7bbda04c | 200 | static KVMSlot *kvm_lookup_matching_slot(KVMMemoryListener *kml, |
a8170e5e | 201 | hwaddr start_addr, |
2747e716 | 202 | hwaddr size) |
d3f8d37f | 203 | { |
7bbda04c | 204 | KVMState *s = kvm_state; |
d3f8d37f AL |
205 | int i; |
206 | ||
fb541ca5 | 207 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c | 208 | KVMSlot *mem = &kml->slots[i]; |
d3f8d37f | 209 | |
2747e716 | 210 | if (start_addr == mem->start_addr && size == mem->memory_size) { |
d3f8d37f AL |
211 | return mem; |
212 | } | |
213 | } | |
214 | ||
05330448 AL |
215 | return NULL; |
216 | } | |
217 | ||
5ea69c2e DH |
218 | /* |
219 | * Calculate and align the start address and the size of the section. | |
220 | * Return the size. If the size is 0, the aligned section is empty. | |
221 | */ | |
222 | static hwaddr kvm_align_section(MemoryRegionSection *section, | |
223 | hwaddr *start) | |
224 | { | |
225 | hwaddr size = int128_get64(section->size); | |
a6ffc423 | 226 | hwaddr delta, aligned; |
5ea69c2e DH |
227 | |
228 | /* kvm works in page size chunks, but the function may be called | |
229 | with sub-page size and unaligned start address. Pad the start | |
230 | address to next and truncate size to previous page boundary. */ | |
a6ffc423 DH |
231 | aligned = ROUND_UP(section->offset_within_address_space, |
232 | qemu_real_host_page_size); | |
233 | delta = aligned - section->offset_within_address_space; | |
234 | *start = aligned; | |
5ea69c2e DH |
235 | if (delta > size) { |
236 | return 0; | |
237 | } | |
5ea69c2e | 238 | |
a6ffc423 | 239 | return (size - delta) & qemu_real_host_page_mask; |
5ea69c2e DH |
240 | } |
241 | ||
9f213ed9 | 242 | int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, |
a8170e5e | 243 | hwaddr *phys_addr) |
983dfc3b | 244 | { |
7bbda04c | 245 | KVMMemoryListener *kml = &s->memory_listener; |
983dfc3b HY |
246 | int i; |
247 | ||
fb541ca5 | 248 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c | 249 | KVMSlot *mem = &kml->slots[i]; |
983dfc3b | 250 | |
9f213ed9 AK |
251 | if (ram >= mem->ram && ram < mem->ram + mem->memory_size) { |
252 | *phys_addr = mem->start_addr + (ram - mem->ram); | |
983dfc3b HY |
253 | return 1; |
254 | } | |
255 | } | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
6c090d4a | 260 | static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot, bool new) |
5832d1f2 | 261 | { |
7bbda04c | 262 | KVMState *s = kvm_state; |
5832d1f2 | 263 | struct kvm_userspace_memory_region mem; |
fe29141b | 264 | int ret; |
5832d1f2 | 265 | |
38bfe691 | 266 | mem.slot = slot->slot | (kml->as_id << 16); |
5832d1f2 | 267 | mem.guest_phys_addr = slot->start_addr; |
9f213ed9 | 268 | mem.userspace_addr = (unsigned long)slot->ram; |
5832d1f2 | 269 | mem.flags = slot->flags; |
651eb0f4 | 270 | |
6c090d4a | 271 | if (slot->memory_size && !new && (mem.flags ^ slot->old_flags) & KVM_MEM_READONLY) { |
235e8982 JJ |
272 | /* Set the slot size to 0 before setting the slot to the desired |
273 | * value. This is needed based on KVM commit 75d61fbc. */ | |
274 | mem.memory_size = 0; | |
275 | kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); | |
276 | } | |
277 | mem.memory_size = slot->memory_size; | |
fe29141b | 278 | ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); |
6c090d4a | 279 | slot->old_flags = mem.flags; |
fe29141b AK |
280 | trace_kvm_set_user_memory(mem.slot, mem.flags, mem.guest_phys_addr, |
281 | mem.memory_size, mem.userspace_addr, ret); | |
282 | return ret; | |
5832d1f2 AL |
283 | } |
284 | ||
4c055ab5 GZ |
285 | int kvm_destroy_vcpu(CPUState *cpu) |
286 | { | |
287 | KVMState *s = kvm_state; | |
288 | long mmap_size; | |
289 | struct KVMParkedVcpu *vcpu = NULL; | |
290 | int ret = 0; | |
291 | ||
292 | DPRINTF("kvm_destroy_vcpu\n"); | |
293 | ||
b1115c99 LA |
294 | ret = kvm_arch_destroy_vcpu(cpu); |
295 | if (ret < 0) { | |
296 | goto err; | |
297 | } | |
298 | ||
4c055ab5 GZ |
299 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); |
300 | if (mmap_size < 0) { | |
301 | ret = mmap_size; | |
302 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); | |
303 | goto err; | |
304 | } | |
305 | ||
306 | ret = munmap(cpu->kvm_run, mmap_size); | |
307 | if (ret < 0) { | |
308 | goto err; | |
309 | } | |
310 | ||
311 | vcpu = g_malloc0(sizeof(*vcpu)); | |
312 | vcpu->vcpu_id = kvm_arch_vcpu_id(cpu); | |
313 | vcpu->kvm_fd = cpu->kvm_fd; | |
314 | QLIST_INSERT_HEAD(&kvm_state->kvm_parked_vcpus, vcpu, node); | |
315 | err: | |
316 | return ret; | |
317 | } | |
318 | ||
319 | static int kvm_get_vcpu(KVMState *s, unsigned long vcpu_id) | |
320 | { | |
321 | struct KVMParkedVcpu *cpu; | |
322 | ||
323 | QLIST_FOREACH(cpu, &s->kvm_parked_vcpus, node) { | |
324 | if (cpu->vcpu_id == vcpu_id) { | |
325 | int kvm_fd; | |
326 | ||
327 | QLIST_REMOVE(cpu, node); | |
328 | kvm_fd = cpu->kvm_fd; | |
329 | g_free(cpu); | |
330 | return kvm_fd; | |
331 | } | |
332 | } | |
333 | ||
334 | return kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)vcpu_id); | |
335 | } | |
336 | ||
504134d2 | 337 | int kvm_init_vcpu(CPUState *cpu) |
05330448 AL |
338 | { |
339 | KVMState *s = kvm_state; | |
340 | long mmap_size; | |
341 | int ret; | |
342 | ||
8c0d577e | 343 | DPRINTF("kvm_init_vcpu\n"); |
05330448 | 344 | |
4c055ab5 | 345 | ret = kvm_get_vcpu(s, kvm_arch_vcpu_id(cpu)); |
05330448 | 346 | if (ret < 0) { |
8c0d577e | 347 | DPRINTF("kvm_create_vcpu failed\n"); |
05330448 AL |
348 | goto err; |
349 | } | |
350 | ||
8737c51c | 351 | cpu->kvm_fd = ret; |
a60f24b5 | 352 | cpu->kvm_state = s; |
99f31832 | 353 | cpu->vcpu_dirty = true; |
05330448 AL |
354 | |
355 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
356 | if (mmap_size < 0) { | |
748a680b | 357 | ret = mmap_size; |
8c0d577e | 358 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); |
05330448 AL |
359 | goto err; |
360 | } | |
361 | ||
f7575c96 | 362 | cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, |
8737c51c | 363 | cpu->kvm_fd, 0); |
f7575c96 | 364 | if (cpu->kvm_run == MAP_FAILED) { |
05330448 | 365 | ret = -errno; |
8c0d577e | 366 | DPRINTF("mmap'ing vcpu state failed\n"); |
05330448 AL |
367 | goto err; |
368 | } | |
369 | ||
a426e122 JK |
370 | if (s->coalesced_mmio && !s->coalesced_mmio_ring) { |
371 | s->coalesced_mmio_ring = | |
f7575c96 | 372 | (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE; |
a426e122 | 373 | } |
62a2744c | 374 | |
20d695a9 | 375 | ret = kvm_arch_init_vcpu(cpu); |
05330448 AL |
376 | err: |
377 | return ret; | |
378 | } | |
379 | ||
5832d1f2 AL |
380 | /* |
381 | * dirty pages logging control | |
382 | */ | |
25254bbc | 383 | |
d6ff5cbc | 384 | static int kvm_mem_flags(MemoryRegion *mr) |
25254bbc | 385 | { |
d6ff5cbc | 386 | bool readonly = mr->readonly || memory_region_is_romd(mr); |
235e8982 | 387 | int flags = 0; |
d6ff5cbc AJ |
388 | |
389 | if (memory_region_get_dirty_log_mask(mr) != 0) { | |
390 | flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
391 | } | |
235e8982 JJ |
392 | if (readonly && kvm_readonly_mem_allowed) { |
393 | flags |= KVM_MEM_READONLY; | |
394 | } | |
395 | return flags; | |
25254bbc MT |
396 | } |
397 | ||
7bbda04c PB |
398 | static int kvm_slot_update_flags(KVMMemoryListener *kml, KVMSlot *mem, |
399 | MemoryRegion *mr) | |
5832d1f2 | 400 | { |
d6ff5cbc | 401 | mem->flags = kvm_mem_flags(mr); |
5832d1f2 | 402 | |
4495d6a7 | 403 | /* If nothing changed effectively, no need to issue ioctl */ |
6c090d4a | 404 | if (mem->flags == mem->old_flags) { |
25254bbc | 405 | return 0; |
4495d6a7 JK |
406 | } |
407 | ||
6c090d4a | 408 | return kvm_set_user_memory_region(kml, mem, false); |
5832d1f2 AL |
409 | } |
410 | ||
7bbda04c PB |
411 | static int kvm_section_update_flags(KVMMemoryListener *kml, |
412 | MemoryRegionSection *section) | |
25254bbc | 413 | { |
343562e8 DH |
414 | hwaddr start_addr, size; |
415 | KVMSlot *mem; | |
25254bbc | 416 | |
343562e8 DH |
417 | size = kvm_align_section(section, &start_addr); |
418 | if (!size) { | |
ea8cb1a8 | 419 | return 0; |
25254bbc | 420 | } |
343562e8 DH |
421 | |
422 | mem = kvm_lookup_matching_slot(kml, start_addr, size); | |
423 | if (!mem) { | |
e377e87c DH |
424 | /* We don't have a slot if we want to trap every access. */ |
425 | return 0; | |
343562e8 DH |
426 | } |
427 | ||
428 | return kvm_slot_update_flags(kml, mem, section->mr); | |
25254bbc MT |
429 | } |
430 | ||
a01672d3 | 431 | static void kvm_log_start(MemoryListener *listener, |
b2dfd71c PB |
432 | MemoryRegionSection *section, |
433 | int old, int new) | |
5832d1f2 | 434 | { |
7bbda04c | 435 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
436 | int r; |
437 | ||
b2dfd71c PB |
438 | if (old != 0) { |
439 | return; | |
440 | } | |
441 | ||
7bbda04c | 442 | r = kvm_section_update_flags(kml, section); |
a01672d3 AK |
443 | if (r < 0) { |
444 | abort(); | |
445 | } | |
5832d1f2 AL |
446 | } |
447 | ||
a01672d3 | 448 | static void kvm_log_stop(MemoryListener *listener, |
b2dfd71c PB |
449 | MemoryRegionSection *section, |
450 | int old, int new) | |
5832d1f2 | 451 | { |
7bbda04c | 452 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
453 | int r; |
454 | ||
b2dfd71c PB |
455 | if (new != 0) { |
456 | return; | |
457 | } | |
458 | ||
7bbda04c | 459 | r = kvm_section_update_flags(kml, section); |
a01672d3 AK |
460 | if (r < 0) { |
461 | abort(); | |
462 | } | |
5832d1f2 AL |
463 | } |
464 | ||
8369e01c | 465 | /* get kvm's dirty pages bitmap and update qemu's */ |
ffcde12f AK |
466 | static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section, |
467 | unsigned long *bitmap) | |
96c1606b | 468 | { |
8e41fb63 FZ |
469 | ram_addr_t start = section->offset_within_region + |
470 | memory_region_get_ram_addr(section->mr); | |
5ff7fb77 JQ |
471 | ram_addr_t pages = int128_get64(section->size) / getpagesize(); |
472 | ||
473 | cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages); | |
8369e01c | 474 | return 0; |
96c1606b AG |
475 | } |
476 | ||
8369e01c MT |
477 | #define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) |
478 | ||
5832d1f2 AL |
479 | /** |
480 | * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space | |
fd4aa979 BS |
481 | * This function updates qemu's dirty bitmap using |
482 | * memory_region_set_dirty(). This means all bits are set | |
483 | * to dirty. | |
5832d1f2 | 484 | * |
d3f8d37f | 485 | * @start_add: start of logged region. |
5832d1f2 AL |
486 | * @end_addr: end of logged region. |
487 | */ | |
7bbda04c PB |
488 | static int kvm_physical_sync_dirty_bitmap(KVMMemoryListener *kml, |
489 | MemoryRegionSection *section) | |
5832d1f2 AL |
490 | { |
491 | KVMState *s = kvm_state; | |
714f78c5 | 492 | struct kvm_dirty_log d = {}; |
151f7749 | 493 | KVMSlot *mem; |
67548f09 DH |
494 | hwaddr start_addr, size; |
495 | ||
496 | size = kvm_align_section(section, &start_addr); | |
497 | if (size) { | |
498 | mem = kvm_lookup_matching_slot(kml, start_addr, size); | |
499 | if (!mem) { | |
e377e87c DH |
500 | /* We don't have a slot if we want to trap every access. */ |
501 | return 0; | |
151f7749 | 502 | } |
5832d1f2 | 503 | |
51b0c606 MT |
504 | /* XXX bad kernel interface alert |
505 | * For dirty bitmap, kernel allocates array of size aligned to | |
506 | * bits-per-long. But for case when the kernel is 64bits and | |
507 | * the userspace is 32bits, userspace can't align to the same | |
508 | * bits-per-long, since sizeof(long) is different between kernel | |
509 | * and user space. This way, userspace will provide buffer which | |
510 | * may be 4 bytes less than the kernel will use, resulting in | |
511 | * userspace memory corruption (which is not detectable by valgrind | |
512 | * too, in most cases). | |
513 | * So for now, let's align to 64 instead of HOST_LONG_BITS here, in | |
cb8d4c8f | 514 | * a hope that sizeof(long) won't become >8 any time soon. |
51b0c606 MT |
515 | */ |
516 | size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), | |
517 | /*HOST_LONG_BITS*/ 64) / 8; | |
67548f09 | 518 | d.dirty_bitmap = g_malloc0(size); |
5832d1f2 | 519 | |
38bfe691 | 520 | d.slot = mem->slot | (kml->as_id << 16); |
50212d63 | 521 | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { |
8c0d577e | 522 | DPRINTF("ioctl failed %d\n", errno); |
67548f09 DH |
523 | g_free(d.dirty_bitmap); |
524 | return -1; | |
151f7749 | 525 | } |
5832d1f2 | 526 | |
ffcde12f | 527 | kvm_get_dirty_pages_log_range(section, d.dirty_bitmap); |
67548f09 | 528 | g_free(d.dirty_bitmap); |
5832d1f2 | 529 | } |
151f7749 | 530 | |
67548f09 | 531 | return 0; |
5832d1f2 AL |
532 | } |
533 | ||
95d2994a AK |
534 | static void kvm_coalesce_mmio_region(MemoryListener *listener, |
535 | MemoryRegionSection *secion, | |
a8170e5e | 536 | hwaddr start, hwaddr size) |
f65ed4c1 | 537 | { |
f65ed4c1 AL |
538 | KVMState *s = kvm_state; |
539 | ||
540 | if (s->coalesced_mmio) { | |
541 | struct kvm_coalesced_mmio_zone zone; | |
542 | ||
543 | zone.addr = start; | |
544 | zone.size = size; | |
7e680753 | 545 | zone.pad = 0; |
f65ed4c1 | 546 | |
95d2994a | 547 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 548 | } |
f65ed4c1 AL |
549 | } |
550 | ||
95d2994a AK |
551 | static void kvm_uncoalesce_mmio_region(MemoryListener *listener, |
552 | MemoryRegionSection *secion, | |
a8170e5e | 553 | hwaddr start, hwaddr size) |
f65ed4c1 | 554 | { |
f65ed4c1 AL |
555 | KVMState *s = kvm_state; |
556 | ||
557 | if (s->coalesced_mmio) { | |
558 | struct kvm_coalesced_mmio_zone zone; | |
559 | ||
560 | zone.addr = start; | |
561 | zone.size = size; | |
7e680753 | 562 | zone.pad = 0; |
f65ed4c1 | 563 | |
95d2994a | 564 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 565 | } |
f65ed4c1 AL |
566 | } |
567 | ||
e6d34aee PH |
568 | static void kvm_coalesce_pio_add(MemoryListener *listener, |
569 | MemoryRegionSection *section, | |
570 | hwaddr start, hwaddr size) | |
571 | { | |
572 | KVMState *s = kvm_state; | |
573 | ||
574 | if (s->coalesced_pio) { | |
575 | struct kvm_coalesced_mmio_zone zone; | |
576 | ||
577 | zone.addr = start; | |
578 | zone.size = size; | |
579 | zone.pio = 1; | |
580 | ||
581 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); | |
582 | } | |
583 | } | |
584 | ||
585 | static void kvm_coalesce_pio_del(MemoryListener *listener, | |
586 | MemoryRegionSection *section, | |
587 | hwaddr start, hwaddr size) | |
588 | { | |
589 | KVMState *s = kvm_state; | |
590 | ||
591 | if (s->coalesced_pio) { | |
592 | struct kvm_coalesced_mmio_zone zone; | |
593 | ||
594 | zone.addr = start; | |
595 | zone.size = size; | |
596 | zone.pio = 1; | |
597 | ||
598 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); | |
599 | } | |
600 | } | |
601 | ||
602 | static MemoryListener kvm_coalesced_pio_listener = { | |
603 | .coalesced_io_add = kvm_coalesce_pio_add, | |
604 | .coalesced_io_del = kvm_coalesce_pio_del, | |
605 | }; | |
606 | ||
ad7b8b33 AL |
607 | int kvm_check_extension(KVMState *s, unsigned int extension) |
608 | { | |
609 | int ret; | |
610 | ||
611 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
612 | if (ret < 0) { | |
613 | ret = 0; | |
614 | } | |
615 | ||
616 | return ret; | |
617 | } | |
618 | ||
7d0a07fa AG |
619 | int kvm_vm_check_extension(KVMState *s, unsigned int extension) |
620 | { | |
621 | int ret; | |
622 | ||
623 | ret = kvm_vm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
624 | if (ret < 0) { | |
625 | /* VM wide version not implemented, use global one instead */ | |
626 | ret = kvm_check_extension(s, extension); | |
627 | } | |
628 | ||
629 | return ret; | |
630 | } | |
631 | ||
b680c5ba GK |
632 | static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size) |
633 | { | |
634 | #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN) | |
635 | /* The kernel expects ioeventfd values in HOST_WORDS_BIGENDIAN | |
636 | * endianness, but the memory core hands them in target endianness. | |
637 | * For example, PPC is always treated as big-endian even if running | |
638 | * on KVM and on PPC64LE. Correct here. | |
639 | */ | |
640 | switch (size) { | |
641 | case 2: | |
642 | val = bswap16(val); | |
643 | break; | |
644 | case 4: | |
645 | val = bswap32(val); | |
646 | break; | |
647 | } | |
648 | #endif | |
649 | return val; | |
650 | } | |
651 | ||
584f2be7 | 652 | static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val, |
41cb62c2 | 653 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
654 | { |
655 | int ret; | |
03a96b83 TH |
656 | struct kvm_ioeventfd iofd = { |
657 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, | |
658 | .addr = addr, | |
659 | .len = size, | |
660 | .flags = 0, | |
661 | .fd = fd, | |
662 | }; | |
500ffd4a | 663 | |
876d16cd DDAG |
664 | trace_kvm_set_ioeventfd_mmio(fd, (uint64_t)addr, val, assign, size, |
665 | datamatch); | |
500ffd4a MT |
666 | if (!kvm_enabled()) { |
667 | return -ENOSYS; | |
668 | } | |
669 | ||
41cb62c2 MT |
670 | if (datamatch) { |
671 | iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
672 | } | |
500ffd4a MT |
673 | if (!assign) { |
674 | iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
675 | } | |
676 | ||
677 | ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); | |
678 | ||
679 | if (ret < 0) { | |
680 | return -errno; | |
681 | } | |
682 | ||
683 | return 0; | |
684 | } | |
685 | ||
44c3f8f7 | 686 | static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val, |
41cb62c2 | 687 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
688 | { |
689 | struct kvm_ioeventfd kick = { | |
b680c5ba | 690 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, |
500ffd4a | 691 | .addr = addr, |
41cb62c2 | 692 | .flags = KVM_IOEVENTFD_FLAG_PIO, |
44c3f8f7 | 693 | .len = size, |
500ffd4a MT |
694 | .fd = fd, |
695 | }; | |
696 | int r; | |
876d16cd | 697 | trace_kvm_set_ioeventfd_pio(fd, addr, val, assign, size, datamatch); |
500ffd4a MT |
698 | if (!kvm_enabled()) { |
699 | return -ENOSYS; | |
700 | } | |
41cb62c2 MT |
701 | if (datamatch) { |
702 | kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
703 | } | |
500ffd4a MT |
704 | if (!assign) { |
705 | kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
706 | } | |
707 | r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); | |
708 | if (r < 0) { | |
709 | return r; | |
710 | } | |
711 | return 0; | |
712 | } | |
713 | ||
714 | ||
d2f2b8a7 SH |
715 | static int kvm_check_many_ioeventfds(void) |
716 | { | |
d0dcac83 SH |
717 | /* Userspace can use ioeventfd for io notification. This requires a host |
718 | * that supports eventfd(2) and an I/O thread; since eventfd does not | |
719 | * support SIGIO it cannot interrupt the vcpu. | |
720 | * | |
721 | * Older kernels have a 6 device limit on the KVM io bus. Find out so we | |
d2f2b8a7 SH |
722 | * can avoid creating too many ioeventfds. |
723 | */ | |
12d4536f | 724 | #if defined(CONFIG_EVENTFD) |
d2f2b8a7 SH |
725 | int ioeventfds[7]; |
726 | int i, ret = 0; | |
727 | for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { | |
728 | ioeventfds[i] = eventfd(0, EFD_CLOEXEC); | |
729 | if (ioeventfds[i] < 0) { | |
730 | break; | |
731 | } | |
41cb62c2 | 732 | ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true); |
d2f2b8a7 SH |
733 | if (ret < 0) { |
734 | close(ioeventfds[i]); | |
735 | break; | |
736 | } | |
737 | } | |
738 | ||
739 | /* Decide whether many devices are supported or not */ | |
740 | ret = i == ARRAY_SIZE(ioeventfds); | |
741 | ||
742 | while (i-- > 0) { | |
41cb62c2 | 743 | kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true); |
d2f2b8a7 SH |
744 | close(ioeventfds[i]); |
745 | } | |
746 | return ret; | |
747 | #else | |
748 | return 0; | |
749 | #endif | |
750 | } | |
751 | ||
94a8d39a JK |
752 | static const KVMCapabilityInfo * |
753 | kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list) | |
754 | { | |
755 | while (list->name) { | |
756 | if (!kvm_check_extension(s, list->value)) { | |
757 | return list; | |
758 | } | |
759 | list++; | |
760 | } | |
761 | return NULL; | |
762 | } | |
763 | ||
7bbda04c PB |
764 | static void kvm_set_phys_mem(KVMMemoryListener *kml, |
765 | MemoryRegionSection *section, bool add) | |
46dbef6a | 766 | { |
f357f564 | 767 | KVMSlot *mem; |
46dbef6a | 768 | int err; |
a01672d3 | 769 | MemoryRegion *mr = section->mr; |
235e8982 | 770 | bool writeable = !mr->readonly && !mr->rom_device; |
5ea69c2e DH |
771 | hwaddr start_addr, size; |
772 | void *ram; | |
46dbef6a | 773 | |
a01672d3 | 774 | if (!memory_region_is_ram(mr)) { |
235e8982 JJ |
775 | if (writeable || !kvm_readonly_mem_allowed) { |
776 | return; | |
777 | } else if (!mr->romd_mode) { | |
778 | /* If the memory device is not in romd_mode, then we actually want | |
779 | * to remove the kvm memory slot so all accesses will trap. */ | |
780 | add = false; | |
781 | } | |
9f213ed9 AK |
782 | } |
783 | ||
5ea69c2e DH |
784 | size = kvm_align_section(section, &start_addr); |
785 | if (!size) { | |
786 | return; | |
787 | } | |
788 | ||
bbfd3017 | 789 | /* use aligned delta to align the ram address */ |
5ea69c2e | 790 | ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + |
bbfd3017 | 791 | (start_addr - section->offset_within_address_space); |
a01672d3 | 792 | |
f357f564 | 793 | if (!add) { |
90ed4bcc | 794 | mem = kvm_lookup_matching_slot(kml, start_addr, size); |
46dbef6a | 795 | if (!mem) { |
46dbef6a MT |
796 | return; |
797 | } | |
1bfbac4e | 798 | if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { |
7bbda04c | 799 | kvm_physical_sync_dirty_bitmap(kml, section); |
3fbffb62 AK |
800 | } |
801 | ||
f357f564 | 802 | /* unregister the slot */ |
46dbef6a | 803 | mem->memory_size = 0; |
6c090d4a SZ |
804 | mem->flags = 0; |
805 | err = kvm_set_user_memory_region(kml, mem, false); | |
46dbef6a | 806 | if (err) { |
1c4fdaba | 807 | fprintf(stderr, "%s: error unregistering slot: %s\n", |
46dbef6a MT |
808 | __func__, strerror(-err)); |
809 | abort(); | |
810 | } | |
f357f564 | 811 | return; |
46dbef6a MT |
812 | } |
813 | ||
f357f564 | 814 | /* register the new slot */ |
7bbda04c | 815 | mem = kvm_alloc_slot(kml); |
46dbef6a MT |
816 | mem->memory_size = size; |
817 | mem->start_addr = start_addr; | |
9f213ed9 | 818 | mem->ram = ram; |
d6ff5cbc | 819 | mem->flags = kvm_mem_flags(mr); |
46dbef6a | 820 | |
6c090d4a | 821 | err = kvm_set_user_memory_region(kml, mem, true); |
46dbef6a MT |
822 | if (err) { |
823 | fprintf(stderr, "%s: error registering slot: %s\n", __func__, | |
824 | strerror(-err)); | |
825 | abort(); | |
826 | } | |
827 | } | |
828 | ||
a01672d3 AK |
829 | static void kvm_region_add(MemoryListener *listener, |
830 | MemoryRegionSection *section) | |
831 | { | |
7bbda04c PB |
832 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
833 | ||
dfde4e6e | 834 | memory_region_ref(section->mr); |
7bbda04c | 835 | kvm_set_phys_mem(kml, section, true); |
a01672d3 AK |
836 | } |
837 | ||
838 | static void kvm_region_del(MemoryListener *listener, | |
839 | MemoryRegionSection *section) | |
840 | { | |
7bbda04c PB |
841 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
842 | ||
843 | kvm_set_phys_mem(kml, section, false); | |
dfde4e6e | 844 | memory_region_unref(section->mr); |
a01672d3 AK |
845 | } |
846 | ||
847 | static void kvm_log_sync(MemoryListener *listener, | |
848 | MemoryRegionSection *section) | |
7b8f3b78 | 849 | { |
7bbda04c | 850 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
851 | int r; |
852 | ||
7bbda04c | 853 | r = kvm_physical_sync_dirty_bitmap(kml, section); |
a01672d3 AK |
854 | if (r < 0) { |
855 | abort(); | |
856 | } | |
7b8f3b78 MT |
857 | } |
858 | ||
d22b096e AK |
859 | static void kvm_mem_ioeventfd_add(MemoryListener *listener, |
860 | MemoryRegionSection *section, | |
861 | bool match_data, uint64_t data, | |
862 | EventNotifier *e) | |
863 | { | |
864 | int fd = event_notifier_get_fd(e); | |
80a1ea37 AK |
865 | int r; |
866 | ||
4b8f1c88 | 867 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
868 | data, true, int128_get64(section->size), |
869 | match_data); | |
80a1ea37 | 870 | if (r < 0) { |
e346bcbf YK |
871 | fprintf(stderr, "%s: error adding ioeventfd: %s (%d)\n", |
872 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
873 | abort(); |
874 | } | |
875 | } | |
876 | ||
d22b096e AK |
877 | static void kvm_mem_ioeventfd_del(MemoryListener *listener, |
878 | MemoryRegionSection *section, | |
879 | bool match_data, uint64_t data, | |
880 | EventNotifier *e) | |
80a1ea37 | 881 | { |
d22b096e | 882 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
883 | int r; |
884 | ||
4b8f1c88 | 885 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
886 | data, false, int128_get64(section->size), |
887 | match_data); | |
80a1ea37 | 888 | if (r < 0) { |
e346bcbf YK |
889 | fprintf(stderr, "%s: error deleting ioeventfd: %s (%d)\n", |
890 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
891 | abort(); |
892 | } | |
893 | } | |
894 | ||
d22b096e AK |
895 | static void kvm_io_ioeventfd_add(MemoryListener *listener, |
896 | MemoryRegionSection *section, | |
897 | bool match_data, uint64_t data, | |
898 | EventNotifier *e) | |
80a1ea37 | 899 | { |
d22b096e | 900 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
901 | int r; |
902 | ||
44c3f8f7 | 903 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
904 | data, true, int128_get64(section->size), |
905 | match_data); | |
80a1ea37 | 906 | if (r < 0) { |
e346bcbf YK |
907 | fprintf(stderr, "%s: error adding ioeventfd: %s (%d)\n", |
908 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
909 | abort(); |
910 | } | |
911 | } | |
912 | ||
d22b096e AK |
913 | static void kvm_io_ioeventfd_del(MemoryListener *listener, |
914 | MemoryRegionSection *section, | |
915 | bool match_data, uint64_t data, | |
916 | EventNotifier *e) | |
80a1ea37 AK |
917 | |
918 | { | |
d22b096e | 919 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
920 | int r; |
921 | ||
44c3f8f7 | 922 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
923 | data, false, int128_get64(section->size), |
924 | match_data); | |
80a1ea37 | 925 | if (r < 0) { |
e346bcbf YK |
926 | fprintf(stderr, "%s: error deleting ioeventfd: %s (%d)\n", |
927 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
928 | abort(); |
929 | } | |
930 | } | |
931 | ||
38bfe691 PB |
932 | void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml, |
933 | AddressSpace *as, int as_id) | |
7bbda04c PB |
934 | { |
935 | int i; | |
936 | ||
937 | kml->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot)); | |
38bfe691 | 938 | kml->as_id = as_id; |
7bbda04c PB |
939 | |
940 | for (i = 0; i < s->nr_slots; i++) { | |
941 | kml->slots[i].slot = i; | |
942 | } | |
943 | ||
944 | kml->listener.region_add = kvm_region_add; | |
945 | kml->listener.region_del = kvm_region_del; | |
946 | kml->listener.log_start = kvm_log_start; | |
947 | kml->listener.log_stop = kvm_log_stop; | |
948 | kml->listener.log_sync = kvm_log_sync; | |
949 | kml->listener.priority = 10; | |
950 | ||
951 | memory_listener_register(&kml->listener, as); | |
952 | } | |
d22b096e AK |
953 | |
954 | static MemoryListener kvm_io_listener = { | |
d22b096e AK |
955 | .eventfd_add = kvm_io_ioeventfd_add, |
956 | .eventfd_del = kvm_io_ioeventfd_del, | |
72e22d2f | 957 | .priority = 10, |
7b8f3b78 MT |
958 | }; |
959 | ||
3889c3fa | 960 | int kvm_set_irq(KVMState *s, int irq, int level) |
84b058d7 JK |
961 | { |
962 | struct kvm_irq_level event; | |
963 | int ret; | |
964 | ||
7ae26bd4 | 965 | assert(kvm_async_interrupts_enabled()); |
84b058d7 JK |
966 | |
967 | event.level = level; | |
968 | event.irq = irq; | |
e333cd69 | 969 | ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event); |
84b058d7 | 970 | if (ret < 0) { |
3889c3fa | 971 | perror("kvm_set_irq"); |
84b058d7 JK |
972 | abort(); |
973 | } | |
974 | ||
e333cd69 | 975 | return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status; |
84b058d7 JK |
976 | } |
977 | ||
978 | #ifdef KVM_CAP_IRQ_ROUTING | |
d3d3bef0 JK |
979 | typedef struct KVMMSIRoute { |
980 | struct kvm_irq_routing_entry kroute; | |
981 | QTAILQ_ENTRY(KVMMSIRoute) entry; | |
982 | } KVMMSIRoute; | |
983 | ||
84b058d7 JK |
984 | static void set_gsi(KVMState *s, unsigned int gsi) |
985 | { | |
8269fb70 | 986 | set_bit(gsi, s->used_gsi_bitmap); |
84b058d7 JK |
987 | } |
988 | ||
04fa27f5 JK |
989 | static void clear_gsi(KVMState *s, unsigned int gsi) |
990 | { | |
8269fb70 | 991 | clear_bit(gsi, s->used_gsi_bitmap); |
04fa27f5 JK |
992 | } |
993 | ||
7b774593 | 994 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 | 995 | { |
04fa27f5 | 996 | int gsi_count, i; |
84b058d7 | 997 | |
00008418 | 998 | gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1; |
84b058d7 | 999 | if (gsi_count > 0) { |
84b058d7 | 1000 | /* Round up so we can search ints using ffs */ |
8269fb70 | 1001 | s->used_gsi_bitmap = bitmap_new(gsi_count); |
4e2e4e63 | 1002 | s->gsi_count = gsi_count; |
84b058d7 JK |
1003 | } |
1004 | ||
1005 | s->irq_routes = g_malloc0(sizeof(*s->irq_routes)); | |
1006 | s->nr_allocated_irq_routes = 0; | |
1007 | ||
50bf31b9 | 1008 | if (!kvm_direct_msi_allowed) { |
4a3adebb JK |
1009 | for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) { |
1010 | QTAILQ_INIT(&s->msi_hashtab[i]); | |
1011 | } | |
04fa27f5 JK |
1012 | } |
1013 | ||
84b058d7 JK |
1014 | kvm_arch_init_irq_routing(s); |
1015 | } | |
1016 | ||
cb925cf9 | 1017 | void kvm_irqchip_commit_routes(KVMState *s) |
e7b20308 JK |
1018 | { |
1019 | int ret; | |
1020 | ||
7005f7f8 PX |
1021 | if (kvm_gsi_direct_mapping()) { |
1022 | return; | |
1023 | } | |
1024 | ||
1025 | if (!kvm_gsi_routing_enabled()) { | |
1026 | return; | |
1027 | } | |
1028 | ||
e7b20308 | 1029 | s->irq_routes->flags = 0; |
54a6c11b | 1030 | trace_kvm_irqchip_commit_routes(); |
e7b20308 JK |
1031 | ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); |
1032 | assert(ret == 0); | |
1033 | } | |
1034 | ||
84b058d7 JK |
1035 | static void kvm_add_routing_entry(KVMState *s, |
1036 | struct kvm_irq_routing_entry *entry) | |
1037 | { | |
1038 | struct kvm_irq_routing_entry *new; | |
1039 | int n, size; | |
1040 | ||
1041 | if (s->irq_routes->nr == s->nr_allocated_irq_routes) { | |
1042 | n = s->nr_allocated_irq_routes * 2; | |
1043 | if (n < 64) { | |
1044 | n = 64; | |
1045 | } | |
1046 | size = sizeof(struct kvm_irq_routing); | |
1047 | size += n * sizeof(*new); | |
1048 | s->irq_routes = g_realloc(s->irq_routes, size); | |
1049 | s->nr_allocated_irq_routes = n; | |
1050 | } | |
1051 | n = s->irq_routes->nr++; | |
1052 | new = &s->irq_routes->entries[n]; | |
0fbc2074 MT |
1053 | |
1054 | *new = *entry; | |
84b058d7 JK |
1055 | |
1056 | set_gsi(s, entry->gsi); | |
1057 | } | |
1058 | ||
cc57407e JK |
1059 | static int kvm_update_routing_entry(KVMState *s, |
1060 | struct kvm_irq_routing_entry *new_entry) | |
1061 | { | |
1062 | struct kvm_irq_routing_entry *entry; | |
1063 | int n; | |
1064 | ||
1065 | for (n = 0; n < s->irq_routes->nr; n++) { | |
1066 | entry = &s->irq_routes->entries[n]; | |
1067 | if (entry->gsi != new_entry->gsi) { | |
1068 | continue; | |
1069 | } | |
1070 | ||
40509f7f MT |
1071 | if(!memcmp(entry, new_entry, sizeof *entry)) { |
1072 | return 0; | |
1073 | } | |
1074 | ||
0fbc2074 | 1075 | *entry = *new_entry; |
cc57407e | 1076 | |
cc57407e JK |
1077 | return 0; |
1078 | } | |
1079 | ||
1080 | return -ESRCH; | |
1081 | } | |
1082 | ||
1df186df | 1083 | void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin) |
84b058d7 | 1084 | { |
0fbc2074 | 1085 | struct kvm_irq_routing_entry e = {}; |
84b058d7 | 1086 | |
4e2e4e63 JK |
1087 | assert(pin < s->gsi_count); |
1088 | ||
84b058d7 JK |
1089 | e.gsi = irq; |
1090 | e.type = KVM_IRQ_ROUTING_IRQCHIP; | |
1091 | e.flags = 0; | |
1092 | e.u.irqchip.irqchip = irqchip; | |
1093 | e.u.irqchip.pin = pin; | |
1094 | kvm_add_routing_entry(s, &e); | |
1095 | } | |
1096 | ||
1e2aa8be | 1097 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
04fa27f5 JK |
1098 | { |
1099 | struct kvm_irq_routing_entry *e; | |
1100 | int i; | |
1101 | ||
76fe21de AK |
1102 | if (kvm_gsi_direct_mapping()) { |
1103 | return; | |
1104 | } | |
1105 | ||
04fa27f5 JK |
1106 | for (i = 0; i < s->irq_routes->nr; i++) { |
1107 | e = &s->irq_routes->entries[i]; | |
1108 | if (e->gsi == virq) { | |
1109 | s->irq_routes->nr--; | |
1110 | *e = s->irq_routes->entries[s->irq_routes->nr]; | |
1111 | } | |
1112 | } | |
1113 | clear_gsi(s, virq); | |
38d87493 | 1114 | kvm_arch_release_virq_post(virq); |
9ba35d0b | 1115 | trace_kvm_irqchip_release_virq(virq); |
04fa27f5 JK |
1116 | } |
1117 | ||
1118 | static unsigned int kvm_hash_msi(uint32_t data) | |
1119 | { | |
1120 | /* This is optimized for IA32 MSI layout. However, no other arch shall | |
1121 | * repeat the mistake of not providing a direct MSI injection API. */ | |
1122 | return data & 0xff; | |
1123 | } | |
1124 | ||
1125 | static void kvm_flush_dynamic_msi_routes(KVMState *s) | |
1126 | { | |
1127 | KVMMSIRoute *route, *next; | |
1128 | unsigned int hash; | |
1129 | ||
1130 | for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) { | |
1131 | QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) { | |
1132 | kvm_irqchip_release_virq(s, route->kroute.gsi); | |
1133 | QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry); | |
1134 | g_free(route); | |
1135 | } | |
1136 | } | |
1137 | } | |
1138 | ||
1139 | static int kvm_irqchip_get_virq(KVMState *s) | |
1140 | { | |
8269fb70 | 1141 | int next_virq; |
04fa27f5 | 1142 | |
bdf02631 WM |
1143 | /* |
1144 | * PIC and IOAPIC share the first 16 GSI numbers, thus the available | |
1145 | * GSI numbers are more than the number of IRQ route. Allocating a GSI | |
1146 | * number can succeed even though a new route entry cannot be added. | |
1147 | * When this happens, flush dynamic MSI entries to free IRQ route entries. | |
1148 | */ | |
50bf31b9 | 1149 | if (!kvm_direct_msi_allowed && s->irq_routes->nr == s->gsi_count) { |
bdf02631 WM |
1150 | kvm_flush_dynamic_msi_routes(s); |
1151 | } | |
1152 | ||
04fa27f5 | 1153 | /* Return the lowest unused GSI in the bitmap */ |
8269fb70 WY |
1154 | next_virq = find_first_zero_bit(s->used_gsi_bitmap, s->gsi_count); |
1155 | if (next_virq >= s->gsi_count) { | |
1156 | return -ENOSPC; | |
1157 | } else { | |
1158 | return next_virq; | |
04fa27f5 | 1159 | } |
04fa27f5 JK |
1160 | } |
1161 | ||
1162 | static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg) | |
1163 | { | |
1164 | unsigned int hash = kvm_hash_msi(msg.data); | |
1165 | KVMMSIRoute *route; | |
1166 | ||
1167 | QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) { | |
1168 | if (route->kroute.u.msi.address_lo == (uint32_t)msg.address && | |
1169 | route->kroute.u.msi.address_hi == (msg.address >> 32) && | |
d07cc1f1 | 1170 | route->kroute.u.msi.data == le32_to_cpu(msg.data)) { |
04fa27f5 JK |
1171 | return route; |
1172 | } | |
1173 | } | |
1174 | return NULL; | |
1175 | } | |
1176 | ||
1177 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1178 | { | |
4a3adebb | 1179 | struct kvm_msi msi; |
04fa27f5 JK |
1180 | KVMMSIRoute *route; |
1181 | ||
50bf31b9 | 1182 | if (kvm_direct_msi_allowed) { |
4a3adebb JK |
1183 | msi.address_lo = (uint32_t)msg.address; |
1184 | msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1185 | msi.data = le32_to_cpu(msg.data); |
4a3adebb JK |
1186 | msi.flags = 0; |
1187 | memset(msi.pad, 0, sizeof(msi.pad)); | |
1188 | ||
1189 | return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi); | |
1190 | } | |
1191 | ||
04fa27f5 JK |
1192 | route = kvm_lookup_msi_route(s, msg); |
1193 | if (!route) { | |
e7b20308 | 1194 | int virq; |
04fa27f5 JK |
1195 | |
1196 | virq = kvm_irqchip_get_virq(s); | |
1197 | if (virq < 0) { | |
1198 | return virq; | |
1199 | } | |
1200 | ||
0fbc2074 | 1201 | route = g_malloc0(sizeof(KVMMSIRoute)); |
04fa27f5 JK |
1202 | route->kroute.gsi = virq; |
1203 | route->kroute.type = KVM_IRQ_ROUTING_MSI; | |
1204 | route->kroute.flags = 0; | |
1205 | route->kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1206 | route->kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1207 | route->kroute.u.msi.data = le32_to_cpu(msg.data); |
04fa27f5 JK |
1208 | |
1209 | kvm_add_routing_entry(s, &route->kroute); | |
cb925cf9 | 1210 | kvm_irqchip_commit_routes(s); |
04fa27f5 JK |
1211 | |
1212 | QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route, | |
1213 | entry); | |
04fa27f5 JK |
1214 | } |
1215 | ||
1216 | assert(route->kroute.type == KVM_IRQ_ROUTING_MSI); | |
1217 | ||
3889c3fa | 1218 | return kvm_set_irq(s, route->kroute.gsi, 1); |
04fa27f5 JK |
1219 | } |
1220 | ||
d1f6af6a | 1221 | int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) |
92b4e489 | 1222 | { |
0fbc2074 | 1223 | struct kvm_irq_routing_entry kroute = {}; |
92b4e489 | 1224 | int virq; |
d1f6af6a PX |
1225 | MSIMessage msg = {0, 0}; |
1226 | ||
88c725c7 | 1227 | if (pci_available && dev) { |
e1d4fb2d | 1228 | msg = pci_get_msi_message(dev, vector); |
d1f6af6a | 1229 | } |
92b4e489 | 1230 | |
76fe21de | 1231 | if (kvm_gsi_direct_mapping()) { |
1850b6b7 | 1232 | return kvm_arch_msi_data_to_gsi(msg.data); |
76fe21de AK |
1233 | } |
1234 | ||
f3e1bed8 | 1235 | if (!kvm_gsi_routing_enabled()) { |
92b4e489 JK |
1236 | return -ENOSYS; |
1237 | } | |
1238 | ||
1239 | virq = kvm_irqchip_get_virq(s); | |
1240 | if (virq < 0) { | |
1241 | return virq; | |
1242 | } | |
1243 | ||
1244 | kroute.gsi = virq; | |
1245 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1246 | kroute.flags = 0; | |
1247 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1248 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1249 | kroute.u.msi.data = le32_to_cpu(msg.data); |
88c725c7 | 1250 | if (pci_available && kvm_msi_devid_required()) { |
767a554a PF |
1251 | kroute.flags = KVM_MSI_VALID_DEVID; |
1252 | kroute.u.msi.devid = pci_requester_id(dev); | |
1253 | } | |
dc9f06ca | 1254 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { |
9e03a040 FB |
1255 | kvm_irqchip_release_virq(s, virq); |
1256 | return -EINVAL; | |
1257 | } | |
92b4e489 | 1258 | |
9ba35d0b PX |
1259 | trace_kvm_irqchip_add_msi_route(dev ? dev->name : (char *)"N/A", |
1260 | vector, virq); | |
54a6c11b | 1261 | |
92b4e489 | 1262 | kvm_add_routing_entry(s, &kroute); |
38d87493 | 1263 | kvm_arch_add_msi_route_post(&kroute, vector, dev); |
cb925cf9 | 1264 | kvm_irqchip_commit_routes(s); |
92b4e489 JK |
1265 | |
1266 | return virq; | |
1267 | } | |
1268 | ||
dc9f06ca PF |
1269 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg, |
1270 | PCIDevice *dev) | |
cc57407e | 1271 | { |
0fbc2074 | 1272 | struct kvm_irq_routing_entry kroute = {}; |
cc57407e | 1273 | |
76fe21de AK |
1274 | if (kvm_gsi_direct_mapping()) { |
1275 | return 0; | |
1276 | } | |
1277 | ||
cc57407e JK |
1278 | if (!kvm_irqchip_in_kernel()) { |
1279 | return -ENOSYS; | |
1280 | } | |
1281 | ||
1282 | kroute.gsi = virq; | |
1283 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1284 | kroute.flags = 0; | |
1285 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1286 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1287 | kroute.u.msi.data = le32_to_cpu(msg.data); |
88c725c7 | 1288 | if (pci_available && kvm_msi_devid_required()) { |
767a554a PF |
1289 | kroute.flags = KVM_MSI_VALID_DEVID; |
1290 | kroute.u.msi.devid = pci_requester_id(dev); | |
1291 | } | |
dc9f06ca | 1292 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { |
9e03a040 FB |
1293 | return -EINVAL; |
1294 | } | |
cc57407e | 1295 | |
54a6c11b PX |
1296 | trace_kvm_irqchip_update_msi_route(virq); |
1297 | ||
cc57407e JK |
1298 | return kvm_update_routing_entry(s, &kroute); |
1299 | } | |
1300 | ||
ca916d37 VM |
1301 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int rfd, int virq, |
1302 | bool assign) | |
39853bbc JK |
1303 | { |
1304 | struct kvm_irqfd irqfd = { | |
1305 | .fd = fd, | |
1306 | .gsi = virq, | |
1307 | .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN, | |
1308 | }; | |
1309 | ||
ca916d37 VM |
1310 | if (rfd != -1) { |
1311 | irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE; | |
1312 | irqfd.resamplefd = rfd; | |
1313 | } | |
1314 | ||
cc7e0ddf | 1315 | if (!kvm_irqfds_enabled()) { |
39853bbc JK |
1316 | return -ENOSYS; |
1317 | } | |
1318 | ||
1319 | return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd); | |
1320 | } | |
1321 | ||
d426d9fb CH |
1322 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
1323 | { | |
e9af2fef | 1324 | struct kvm_irq_routing_entry kroute = {}; |
d426d9fb CH |
1325 | int virq; |
1326 | ||
1327 | if (!kvm_gsi_routing_enabled()) { | |
1328 | return -ENOSYS; | |
1329 | } | |
1330 | ||
1331 | virq = kvm_irqchip_get_virq(s); | |
1332 | if (virq < 0) { | |
1333 | return virq; | |
1334 | } | |
1335 | ||
1336 | kroute.gsi = virq; | |
1337 | kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER; | |
1338 | kroute.flags = 0; | |
1339 | kroute.u.adapter.summary_addr = adapter->summary_addr; | |
1340 | kroute.u.adapter.ind_addr = adapter->ind_addr; | |
1341 | kroute.u.adapter.summary_offset = adapter->summary_offset; | |
1342 | kroute.u.adapter.ind_offset = adapter->ind_offset; | |
1343 | kroute.u.adapter.adapter_id = adapter->adapter_id; | |
1344 | ||
1345 | kvm_add_routing_entry(s, &kroute); | |
d426d9fb CH |
1346 | |
1347 | return virq; | |
1348 | } | |
1349 | ||
977a8d9c AS |
1350 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) |
1351 | { | |
1352 | struct kvm_irq_routing_entry kroute = {}; | |
1353 | int virq; | |
1354 | ||
1355 | if (!kvm_gsi_routing_enabled()) { | |
1356 | return -ENOSYS; | |
1357 | } | |
1358 | if (!kvm_check_extension(s, KVM_CAP_HYPERV_SYNIC)) { | |
1359 | return -ENOSYS; | |
1360 | } | |
1361 | virq = kvm_irqchip_get_virq(s); | |
1362 | if (virq < 0) { | |
1363 | return virq; | |
1364 | } | |
1365 | ||
1366 | kroute.gsi = virq; | |
1367 | kroute.type = KVM_IRQ_ROUTING_HV_SINT; | |
1368 | kroute.flags = 0; | |
1369 | kroute.u.hv_sint.vcpu = vcpu; | |
1370 | kroute.u.hv_sint.sint = sint; | |
1371 | ||
1372 | kvm_add_routing_entry(s, &kroute); | |
1373 | kvm_irqchip_commit_routes(s); | |
1374 | ||
1375 | return virq; | |
1376 | } | |
1377 | ||
84b058d7 JK |
1378 | #else /* !KVM_CAP_IRQ_ROUTING */ |
1379 | ||
7b774593 | 1380 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 JK |
1381 | { |
1382 | } | |
04fa27f5 | 1383 | |
d3d3bef0 JK |
1384 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
1385 | { | |
1386 | } | |
1387 | ||
04fa27f5 JK |
1388 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) |
1389 | { | |
1390 | abort(); | |
1391 | } | |
92b4e489 | 1392 | |
d1f6af6a | 1393 | int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) |
92b4e489 | 1394 | { |
df410675 | 1395 | return -ENOSYS; |
92b4e489 | 1396 | } |
39853bbc | 1397 | |
d426d9fb CH |
1398 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
1399 | { | |
1400 | return -ENOSYS; | |
1401 | } | |
1402 | ||
977a8d9c AS |
1403 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) |
1404 | { | |
1405 | return -ENOSYS; | |
1406 | } | |
1407 | ||
39853bbc JK |
1408 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign) |
1409 | { | |
1410 | abort(); | |
1411 | } | |
dabe3143 MT |
1412 | |
1413 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) | |
1414 | { | |
1415 | return -ENOSYS; | |
1416 | } | |
84b058d7 JK |
1417 | #endif /* !KVM_CAP_IRQ_ROUTING */ |
1418 | ||
1c9b71a7 EA |
1419 | int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, |
1420 | EventNotifier *rn, int virq) | |
39853bbc | 1421 | { |
ca916d37 VM |
1422 | return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), |
1423 | rn ? event_notifier_get_fd(rn) : -1, virq, true); | |
39853bbc JK |
1424 | } |
1425 | ||
1c9b71a7 EA |
1426 | int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, |
1427 | int virq) | |
15b2bd18 | 1428 | { |
ca916d37 VM |
1429 | return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), -1, virq, |
1430 | false); | |
15b2bd18 PB |
1431 | } |
1432 | ||
197e3524 EA |
1433 | int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, |
1434 | EventNotifier *rn, qemu_irq irq) | |
1435 | { | |
1436 | gpointer key, gsi; | |
1437 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
1438 | ||
1439 | if (!found) { | |
1440 | return -ENXIO; | |
1441 | } | |
1442 | return kvm_irqchip_add_irqfd_notifier_gsi(s, n, rn, GPOINTER_TO_INT(gsi)); | |
1443 | } | |
1444 | ||
1445 | int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, | |
1446 | qemu_irq irq) | |
1447 | { | |
1448 | gpointer key, gsi; | |
1449 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
1450 | ||
1451 | if (!found) { | |
1452 | return -ENXIO; | |
1453 | } | |
1454 | return kvm_irqchip_remove_irqfd_notifier_gsi(s, n, GPOINTER_TO_INT(gsi)); | |
1455 | } | |
1456 | ||
1457 | void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi) | |
1458 | { | |
1459 | g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi)); | |
1460 | } | |
1461 | ||
8db4936b | 1462 | static void kvm_irqchip_create(MachineState *machine, KVMState *s) |
84b058d7 | 1463 | { |
84b058d7 JK |
1464 | int ret; |
1465 | ||
8db4936b PB |
1466 | if (kvm_check_extension(s, KVM_CAP_IRQCHIP)) { |
1467 | ; | |
1468 | } else if (kvm_check_extension(s, KVM_CAP_S390_IRQCHIP)) { | |
1469 | ret = kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0); | |
1470 | if (ret < 0) { | |
1471 | fprintf(stderr, "Enable kernel irqchip failed: %s\n", strerror(-ret)); | |
1472 | exit(1); | |
1473 | } | |
1474 | } else { | |
1475 | return; | |
84b058d7 JK |
1476 | } |
1477 | ||
d6032e06 CD |
1478 | /* First probe and see if there's a arch-specific hook to create the |
1479 | * in-kernel irqchip for us */ | |
15eafc2e | 1480 | ret = kvm_arch_irqchip_create(machine, s); |
8db4936b | 1481 | if (ret == 0) { |
15eafc2e PB |
1482 | if (machine_kernel_irqchip_split(machine)) { |
1483 | perror("Split IRQ chip mode not supported."); | |
1484 | exit(1); | |
1485 | } else { | |
1486 | ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); | |
1487 | } | |
8db4936b PB |
1488 | } |
1489 | if (ret < 0) { | |
1490 | fprintf(stderr, "Create kernel irqchip failed: %s\n", strerror(-ret)); | |
1491 | exit(1); | |
84b058d7 JK |
1492 | } |
1493 | ||
3d4b2649 | 1494 | kvm_kernel_irqchip = true; |
7ae26bd4 PM |
1495 | /* If we have an in-kernel IRQ chip then we must have asynchronous |
1496 | * interrupt delivery (though the reverse is not necessarily true) | |
1497 | */ | |
1498 | kvm_async_interrupts_allowed = true; | |
215e79c0 | 1499 | kvm_halt_in_kernel_allowed = true; |
84b058d7 JK |
1500 | |
1501 | kvm_init_irq_routing(s); | |
1502 | ||
197e3524 | 1503 | s->gsimap = g_hash_table_new(g_direct_hash, g_direct_equal); |
84b058d7 JK |
1504 | } |
1505 | ||
670436ce AJ |
1506 | /* Find number of supported CPUs using the recommended |
1507 | * procedure from the kernel API documentation to cope with | |
1508 | * older kernels that may be missing capabilities. | |
1509 | */ | |
1510 | static int kvm_recommended_vcpus(KVMState *s) | |
3ed444e9 | 1511 | { |
11748ba7 | 1512 | int ret = kvm_vm_check_extension(s, KVM_CAP_NR_VCPUS); |
670436ce AJ |
1513 | return (ret) ? ret : 4; |
1514 | } | |
3ed444e9 | 1515 | |
670436ce AJ |
1516 | static int kvm_max_vcpus(KVMState *s) |
1517 | { | |
1518 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS); | |
1519 | return (ret) ? ret : kvm_recommended_vcpus(s); | |
3ed444e9 DH |
1520 | } |
1521 | ||
f31e3266 GK |
1522 | static int kvm_max_vcpu_id(KVMState *s) |
1523 | { | |
1524 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPU_ID); | |
1525 | return (ret) ? ret : kvm_max_vcpus(s); | |
1526 | } | |
1527 | ||
41264b38 GK |
1528 | bool kvm_vcpu_id_is_valid(int vcpu_id) |
1529 | { | |
1530 | KVMState *s = KVM_STATE(current_machine->accelerator); | |
f31e3266 | 1531 | return vcpu_id >= 0 && vcpu_id < kvm_max_vcpu_id(s); |
41264b38 GK |
1532 | } |
1533 | ||
f6a1ef64 | 1534 | static int kvm_init(MachineState *ms) |
05330448 | 1535 | { |
f6a1ef64 | 1536 | MachineClass *mc = MACHINE_GET_CLASS(ms); |
168ccc11 JK |
1537 | static const char upgrade_note[] = |
1538 | "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" | |
1539 | "(see http://sourceforge.net/projects/kvm).\n"; | |
670436ce AJ |
1540 | struct { |
1541 | const char *name; | |
1542 | int num; | |
1543 | } num_cpus[] = { | |
1544 | { "SMP", smp_cpus }, | |
1545 | { "hotpluggable", max_cpus }, | |
1546 | { NULL, } | |
1547 | }, *nc = num_cpus; | |
1548 | int soft_vcpus_limit, hard_vcpus_limit; | |
05330448 | 1549 | KVMState *s; |
94a8d39a | 1550 | const KVMCapabilityInfo *missing_cap; |
05330448 | 1551 | int ret; |
7bbda04c | 1552 | int type = 0; |
135a129a | 1553 | const char *kvm_type; |
05330448 | 1554 | |
fc02086b | 1555 | s = KVM_STATE(ms->accelerator); |
05330448 | 1556 | |
3145fcb6 DG |
1557 | /* |
1558 | * On systems where the kernel can support different base page | |
1559 | * sizes, host page size may be different from TARGET_PAGE_SIZE, | |
1560 | * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum | |
1561 | * page size for the system though. | |
1562 | */ | |
1563 | assert(TARGET_PAGE_SIZE <= getpagesize()); | |
1564 | ||
aed6efb9 JH |
1565 | s->sigmask_len = 8; |
1566 | ||
e22a25c9 | 1567 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
72cf2d4f | 1568 | QTAILQ_INIT(&s->kvm_sw_breakpoints); |
e22a25c9 | 1569 | #endif |
4c055ab5 | 1570 | QLIST_INIT(&s->kvm_parked_vcpus); |
05330448 | 1571 | s->vmfd = -1; |
40ff6d7e | 1572 | s->fd = qemu_open("/dev/kvm", O_RDWR); |
05330448 AL |
1573 | if (s->fd == -1) { |
1574 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); | |
1575 | ret = -errno; | |
1576 | goto err; | |
1577 | } | |
1578 | ||
1579 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); | |
1580 | if (ret < KVM_API_VERSION) { | |
0e1dac6c | 1581 | if (ret >= 0) { |
05330448 | 1582 | ret = -EINVAL; |
a426e122 | 1583 | } |
05330448 AL |
1584 | fprintf(stderr, "kvm version too old\n"); |
1585 | goto err; | |
1586 | } | |
1587 | ||
1588 | if (ret > KVM_API_VERSION) { | |
1589 | ret = -EINVAL; | |
1590 | fprintf(stderr, "kvm version not supported\n"); | |
1591 | goto err; | |
1592 | } | |
1593 | ||
cf0f7cf9 | 1594 | kvm_immediate_exit = kvm_check_extension(s, KVM_CAP_IMMEDIATE_EXIT); |
fb541ca5 AW |
1595 | s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS); |
1596 | ||
1597 | /* If unspecified, use the default value */ | |
1598 | if (!s->nr_slots) { | |
1599 | s->nr_slots = 32; | |
1600 | } | |
1601 | ||
135a129a | 1602 | kvm_type = qemu_opt_get(qemu_get_machine_opts(), "kvm-type"); |
f1e29879 | 1603 | if (mc->kvm_type) { |
dc0ca80e | 1604 | type = mc->kvm_type(ms, kvm_type); |
135a129a | 1605 | } else if (kvm_type) { |
0e1dac6c | 1606 | ret = -EINVAL; |
135a129a AK |
1607 | fprintf(stderr, "Invalid argument kvm-type=%s\n", kvm_type); |
1608 | goto err; | |
1609 | } | |
1610 | ||
94ccff13 | 1611 | do { |
135a129a | 1612 | ret = kvm_ioctl(s, KVM_CREATE_VM, type); |
94ccff13 TK |
1613 | } while (ret == -EINTR); |
1614 | ||
1615 | if (ret < 0) { | |
521f438e | 1616 | fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret, |
94ccff13 TK |
1617 | strerror(-ret)); |
1618 | ||
0104dcac | 1619 | #ifdef TARGET_S390X |
2c80e996 CH |
1620 | if (ret == -EINVAL) { |
1621 | fprintf(stderr, | |
1622 | "Host kernel setup problem detected. Please verify:\n"); | |
1623 | fprintf(stderr, "- for kernels supporting the switch_amode or" | |
1624 | " user_mode parameters, whether\n"); | |
1625 | fprintf(stderr, | |
1626 | " user space is running in primary address space\n"); | |
1627 | fprintf(stderr, | |
1628 | "- for kernels supporting the vm.allocate_pgste sysctl, " | |
1629 | "whether it is enabled\n"); | |
1630 | } | |
0104dcac | 1631 | #endif |
05330448 | 1632 | goto err; |
0104dcac | 1633 | } |
05330448 | 1634 | |
94ccff13 | 1635 | s->vmfd = ret; |
11748ba7 GK |
1636 | |
1637 | /* check the vcpu limits */ | |
1638 | soft_vcpus_limit = kvm_recommended_vcpus(s); | |
1639 | hard_vcpus_limit = kvm_max_vcpus(s); | |
1640 | ||
1641 | while (nc->name) { | |
1642 | if (nc->num > soft_vcpus_limit) { | |
1643 | warn_report("Number of %s cpus requested (%d) exceeds " | |
1644 | "the recommended cpus supported by KVM (%d)", | |
1645 | nc->name, nc->num, soft_vcpus_limit); | |
1646 | ||
1647 | if (nc->num > hard_vcpus_limit) { | |
1648 | fprintf(stderr, "Number of %s cpus requested (%d) exceeds " | |
1649 | "the maximum cpus supported by KVM (%d)\n", | |
1650 | nc->name, nc->num, hard_vcpus_limit); | |
1651 | exit(1); | |
1652 | } | |
1653 | } | |
1654 | nc++; | |
1655 | } | |
1656 | ||
94a8d39a JK |
1657 | missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); |
1658 | if (!missing_cap) { | |
1659 | missing_cap = | |
1660 | kvm_check_extension_list(s, kvm_arch_required_capabilities); | |
05330448 | 1661 | } |
94a8d39a | 1662 | if (missing_cap) { |
ad7b8b33 | 1663 | ret = -EINVAL; |
94a8d39a JK |
1664 | fprintf(stderr, "kvm does not support %s\n%s", |
1665 | missing_cap->name, upgrade_note); | |
d85dc283 AL |
1666 | goto err; |
1667 | } | |
1668 | ||
ad7b8b33 | 1669 | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
e6d34aee PH |
1670 | s->coalesced_pio = s->coalesced_mmio && |
1671 | kvm_check_extension(s, KVM_CAP_COALESCED_PIO); | |
f65ed4c1 | 1672 | |
a0fb002c JK |
1673 | #ifdef KVM_CAP_VCPU_EVENTS |
1674 | s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); | |
1675 | #endif | |
1676 | ||
b0b1d690 JK |
1677 | s->robust_singlestep = |
1678 | kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); | |
b0b1d690 | 1679 | |
ff44f1a3 JK |
1680 | #ifdef KVM_CAP_DEBUGREGS |
1681 | s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); | |
1682 | #endif | |
1683 | ||
d3d3bef0 | 1684 | #ifdef KVM_CAP_IRQ_ROUTING |
50bf31b9 | 1685 | kvm_direct_msi_allowed = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0); |
d3d3bef0 | 1686 | #endif |
4a3adebb | 1687 | |
3ab73842 JK |
1688 | s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3); |
1689 | ||
e333cd69 | 1690 | s->irq_set_ioctl = KVM_IRQ_LINE; |
8732fbd2 | 1691 | if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) { |
e333cd69 | 1692 | s->irq_set_ioctl = KVM_IRQ_LINE_STATUS; |
8732fbd2 PM |
1693 | } |
1694 | ||
df9c8b75 JJ |
1695 | kvm_readonly_mem_allowed = |
1696 | (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0); | |
df9c8b75 | 1697 | |
69e03ae6 NN |
1698 | kvm_eventfds_allowed = |
1699 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0); | |
1700 | ||
f41389ae EA |
1701 | kvm_irqfds_allowed = |
1702 | (kvm_check_extension(s, KVM_CAP_IRQFD) > 0); | |
1703 | ||
1704 | kvm_resamplefds_allowed = | |
1705 | (kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0); | |
1706 | ||
d0a073a1 DD |
1707 | kvm_vm_attributes_allowed = |
1708 | (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0); | |
1709 | ||
35108223 JW |
1710 | kvm_ioeventfd_any_length_allowed = |
1711 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD_ANY_LENGTH) > 0); | |
1712 | ||
d870cfde GA |
1713 | kvm_state = s; |
1714 | ||
b20e3780 BS |
1715 | /* |
1716 | * if memory encryption object is specified then initialize the memory | |
1717 | * encryption context. | |
1718 | */ | |
1719 | if (ms->memory_encryption) { | |
1720 | kvm_state->memcrypt_handle = sev_guest_init(ms->memory_encryption); | |
1721 | if (!kvm_state->memcrypt_handle) { | |
1722 | ret = -1; | |
1723 | goto err; | |
1724 | } | |
54e89539 BS |
1725 | |
1726 | kvm_state->memcrypt_encrypt_data = sev_encrypt_data; | |
b20e3780 BS |
1727 | } |
1728 | ||
b16565b3 | 1729 | ret = kvm_arch_init(ms, s); |
a426e122 | 1730 | if (ret < 0) { |
05330448 | 1731 | goto err; |
a426e122 | 1732 | } |
05330448 | 1733 | |
8db4936b PB |
1734 | if (machine_kernel_irqchip_allowed(ms)) { |
1735 | kvm_irqchip_create(ms, s); | |
84b058d7 JK |
1736 | } |
1737 | ||
8c56c1a5 PF |
1738 | if (kvm_eventfds_allowed) { |
1739 | s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add; | |
1740 | s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del; | |
1741 | } | |
e6d34aee PH |
1742 | s->memory_listener.listener.coalesced_io_add = kvm_coalesce_mmio_region; |
1743 | s->memory_listener.listener.coalesced_io_del = kvm_uncoalesce_mmio_region; | |
7bbda04c PB |
1744 | |
1745 | kvm_memory_listener_register(s, &s->memory_listener, | |
38bfe691 | 1746 | &address_space_memory, 0); |
7bbda04c PB |
1747 | memory_listener_register(&kvm_io_listener, |
1748 | &address_space_io); | |
e6d34aee PH |
1749 | memory_listener_register(&kvm_coalesced_pio_listener, |
1750 | &address_space_io); | |
05330448 | 1751 | |
d2f2b8a7 SH |
1752 | s->many_ioeventfds = kvm_check_many_ioeventfds(); |
1753 | ||
62dd4eda | 1754 | s->sync_mmu = !!kvm_vm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); |
f5948942 AW |
1755 | if (!s->sync_mmu) { |
1756 | qemu_balloon_inhibit(true); | |
1757 | } | |
62dd4eda | 1758 | |
05330448 AL |
1759 | return 0; |
1760 | ||
1761 | err: | |
0e1dac6c | 1762 | assert(ret < 0); |
6d1cc321 SW |
1763 | if (s->vmfd >= 0) { |
1764 | close(s->vmfd); | |
1765 | } | |
1766 | if (s->fd != -1) { | |
1767 | close(s->fd); | |
05330448 | 1768 | } |
7bbda04c | 1769 | g_free(s->memory_listener.slots); |
05330448 AL |
1770 | |
1771 | return ret; | |
1772 | } | |
1773 | ||
aed6efb9 JH |
1774 | void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len) |
1775 | { | |
1776 | s->sigmask_len = sigmask_len; | |
1777 | } | |
1778 | ||
4c663752 PB |
1779 | static void kvm_handle_io(uint16_t port, MemTxAttrs attrs, void *data, int direction, |
1780 | int size, uint32_t count) | |
05330448 AL |
1781 | { |
1782 | int i; | |
1783 | uint8_t *ptr = data; | |
1784 | ||
1785 | for (i = 0; i < count; i++) { | |
4c663752 | 1786 | address_space_rw(&address_space_io, port, attrs, |
5c9eb028 | 1787 | ptr, size, |
354678c5 | 1788 | direction == KVM_EXIT_IO_OUT); |
05330448 AL |
1789 | ptr += size; |
1790 | } | |
05330448 AL |
1791 | } |
1792 | ||
5326ab55 | 1793 | static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run) |
7c80eef8 | 1794 | { |
977c7b6d RK |
1795 | fprintf(stderr, "KVM internal error. Suberror: %d\n", |
1796 | run->internal.suberror); | |
1797 | ||
7c80eef8 MT |
1798 | if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) { |
1799 | int i; | |
1800 | ||
7c80eef8 MT |
1801 | for (i = 0; i < run->internal.ndata; ++i) { |
1802 | fprintf(stderr, "extra data[%d]: %"PRIx64"\n", | |
1803 | i, (uint64_t)run->internal.data[i]); | |
1804 | } | |
1805 | } | |
7c80eef8 MT |
1806 | if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) { |
1807 | fprintf(stderr, "emulation failure\n"); | |
20d695a9 | 1808 | if (!kvm_arch_stop_on_emulation_error(cpu)) { |
90c84c56 | 1809 | cpu_dump_state(cpu, stderr, CPU_DUMP_CODE); |
d73cd8f4 | 1810 | return EXCP_INTERRUPT; |
a426e122 | 1811 | } |
7c80eef8 MT |
1812 | } |
1813 | /* FIXME: Should trigger a qmp message to let management know | |
1814 | * something went wrong. | |
1815 | */ | |
73aaec4a | 1816 | return -1; |
7c80eef8 | 1817 | } |
7c80eef8 | 1818 | |
62a2744c | 1819 | void kvm_flush_coalesced_mmio_buffer(void) |
f65ed4c1 | 1820 | { |
f65ed4c1 | 1821 | KVMState *s = kvm_state; |
1cae88b9 AK |
1822 | |
1823 | if (s->coalesced_flush_in_progress) { | |
1824 | return; | |
1825 | } | |
1826 | ||
1827 | s->coalesced_flush_in_progress = true; | |
1828 | ||
62a2744c SY |
1829 | if (s->coalesced_mmio_ring) { |
1830 | struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring; | |
f65ed4c1 AL |
1831 | while (ring->first != ring->last) { |
1832 | struct kvm_coalesced_mmio *ent; | |
1833 | ||
1834 | ent = &ring->coalesced_mmio[ring->first]; | |
1835 | ||
e6d34aee PH |
1836 | if (ent->pio == 1) { |
1837 | address_space_rw(&address_space_io, ent->phys_addr, | |
1838 | MEMTXATTRS_UNSPECIFIED, ent->data, | |
1839 | ent->len, true); | |
1840 | } else { | |
1841 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); | |
1842 | } | |
85199474 | 1843 | smp_wmb(); |
f65ed4c1 AL |
1844 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; |
1845 | } | |
1846 | } | |
1cae88b9 AK |
1847 | |
1848 | s->coalesced_flush_in_progress = false; | |
f65ed4c1 AL |
1849 | } |
1850 | ||
14e6fe12 | 1851 | static void do_kvm_cpu_synchronize_state(CPUState *cpu, run_on_cpu_data arg) |
4c0960c0 | 1852 | { |
99f31832 | 1853 | if (!cpu->vcpu_dirty) { |
20d695a9 | 1854 | kvm_arch_get_registers(cpu); |
99f31832 | 1855 | cpu->vcpu_dirty = true; |
4c0960c0 AK |
1856 | } |
1857 | } | |
1858 | ||
dd1750d7 | 1859 | void kvm_cpu_synchronize_state(CPUState *cpu) |
2705d56a | 1860 | { |
99f31832 | 1861 | if (!cpu->vcpu_dirty) { |
14e6fe12 | 1862 | run_on_cpu(cpu, do_kvm_cpu_synchronize_state, RUN_ON_CPU_NULL); |
a426e122 | 1863 | } |
2705d56a JK |
1864 | } |
1865 | ||
14e6fe12 | 1866 | static void do_kvm_cpu_synchronize_post_reset(CPUState *cpu, run_on_cpu_data arg) |
ea375f9a | 1867 | { |
20d695a9 | 1868 | kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE); |
99f31832 | 1869 | cpu->vcpu_dirty = false; |
ea375f9a JK |
1870 | } |
1871 | ||
c8e2085d DH |
1872 | void kvm_cpu_synchronize_post_reset(CPUState *cpu) |
1873 | { | |
14e6fe12 | 1874 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_reset, RUN_ON_CPU_NULL); |
c8e2085d DH |
1875 | } |
1876 | ||
14e6fe12 | 1877 | static void do_kvm_cpu_synchronize_post_init(CPUState *cpu, run_on_cpu_data arg) |
ea375f9a | 1878 | { |
20d695a9 | 1879 | kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE); |
99f31832 | 1880 | cpu->vcpu_dirty = false; |
ea375f9a JK |
1881 | } |
1882 | ||
c8e2085d DH |
1883 | void kvm_cpu_synchronize_post_init(CPUState *cpu) |
1884 | { | |
14e6fe12 | 1885 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, RUN_ON_CPU_NULL); |
c8e2085d DH |
1886 | } |
1887 | ||
75e972da DG |
1888 | static void do_kvm_cpu_synchronize_pre_loadvm(CPUState *cpu, run_on_cpu_data arg) |
1889 | { | |
99f31832 | 1890 | cpu->vcpu_dirty = true; |
75e972da DG |
1891 | } |
1892 | ||
1893 | void kvm_cpu_synchronize_pre_loadvm(CPUState *cpu) | |
1894 | { | |
1895 | run_on_cpu(cpu, do_kvm_cpu_synchronize_pre_loadvm, RUN_ON_CPU_NULL); | |
1896 | } | |
1897 | ||
2ae41db2 PB |
1898 | #ifdef KVM_HAVE_MCE_INJECTION |
1899 | static __thread void *pending_sigbus_addr; | |
1900 | static __thread int pending_sigbus_code; | |
1901 | static __thread bool have_sigbus_pending; | |
1902 | #endif | |
1903 | ||
cf0f7cf9 PB |
1904 | static void kvm_cpu_kick(CPUState *cpu) |
1905 | { | |
1906 | atomic_set(&cpu->kvm_run->immediate_exit, 1); | |
1907 | } | |
1908 | ||
1909 | static void kvm_cpu_kick_self(void) | |
1910 | { | |
1911 | if (kvm_immediate_exit) { | |
1912 | kvm_cpu_kick(current_cpu); | |
1913 | } else { | |
1914 | qemu_cpu_kick_self(); | |
1915 | } | |
1916 | } | |
1917 | ||
18268b60 PB |
1918 | static void kvm_eat_signals(CPUState *cpu) |
1919 | { | |
1920 | struct timespec ts = { 0, 0 }; | |
1921 | siginfo_t siginfo; | |
1922 | sigset_t waitset; | |
1923 | sigset_t chkset; | |
1924 | int r; | |
1925 | ||
cf0f7cf9 PB |
1926 | if (kvm_immediate_exit) { |
1927 | atomic_set(&cpu->kvm_run->immediate_exit, 0); | |
1928 | /* Write kvm_run->immediate_exit before the cpu->exit_request | |
1929 | * write in kvm_cpu_exec. | |
1930 | */ | |
1931 | smp_wmb(); | |
1932 | return; | |
1933 | } | |
1934 | ||
18268b60 PB |
1935 | sigemptyset(&waitset); |
1936 | sigaddset(&waitset, SIG_IPI); | |
1937 | ||
1938 | do { | |
1939 | r = sigtimedwait(&waitset, &siginfo, &ts); | |
1940 | if (r == -1 && !(errno == EAGAIN || errno == EINTR)) { | |
1941 | perror("sigtimedwait"); | |
1942 | exit(1); | |
1943 | } | |
1944 | ||
1945 | r = sigpending(&chkset); | |
1946 | if (r == -1) { | |
1947 | perror("sigpending"); | |
1948 | exit(1); | |
1949 | } | |
1950 | } while (sigismember(&chkset, SIG_IPI)); | |
1951 | } | |
1952 | ||
1458c363 | 1953 | int kvm_cpu_exec(CPUState *cpu) |
05330448 | 1954 | { |
f7575c96 | 1955 | struct kvm_run *run = cpu->kvm_run; |
7cbb533f | 1956 | int ret, run_ret; |
05330448 | 1957 | |
8c0d577e | 1958 | DPRINTF("kvm_cpu_exec()\n"); |
05330448 | 1959 | |
20d695a9 | 1960 | if (kvm_arch_process_async_events(cpu)) { |
c5c6679d | 1961 | atomic_set(&cpu->exit_request, 0); |
6792a57b | 1962 | return EXCP_HLT; |
9ccfac9e | 1963 | } |
0af691d7 | 1964 | |
4b8523ee | 1965 | qemu_mutex_unlock_iothread(); |
1d78a3c3 | 1966 | cpu_exec_start(cpu); |
4b8523ee | 1967 | |
9ccfac9e | 1968 | do { |
4c663752 PB |
1969 | MemTxAttrs attrs; |
1970 | ||
99f31832 | 1971 | if (cpu->vcpu_dirty) { |
20d695a9 | 1972 | kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE); |
99f31832 | 1973 | cpu->vcpu_dirty = false; |
4c0960c0 AK |
1974 | } |
1975 | ||
20d695a9 | 1976 | kvm_arch_pre_run(cpu, run); |
c5c6679d | 1977 | if (atomic_read(&cpu->exit_request)) { |
9ccfac9e JK |
1978 | DPRINTF("interrupt exit requested\n"); |
1979 | /* | |
1980 | * KVM requires us to reenter the kernel after IO exits to complete | |
1981 | * instruction emulation. This self-signal will ensure that we | |
1982 | * leave ASAP again. | |
1983 | */ | |
cf0f7cf9 | 1984 | kvm_cpu_kick_self(); |
9ccfac9e | 1985 | } |
9ccfac9e | 1986 | |
cf0f7cf9 PB |
1987 | /* Read cpu->exit_request before KVM_RUN reads run->immediate_exit. |
1988 | * Matching barrier in kvm_eat_signals. | |
1989 | */ | |
1990 | smp_rmb(); | |
1991 | ||
1bc22652 | 1992 | run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0); |
9ccfac9e | 1993 | |
4c663752 | 1994 | attrs = kvm_arch_post_run(cpu, run); |
05330448 | 1995 | |
2ae41db2 PB |
1996 | #ifdef KVM_HAVE_MCE_INJECTION |
1997 | if (unlikely(have_sigbus_pending)) { | |
1998 | qemu_mutex_lock_iothread(); | |
1999 | kvm_arch_on_sigbus_vcpu(cpu, pending_sigbus_code, | |
2000 | pending_sigbus_addr); | |
2001 | have_sigbus_pending = false; | |
2002 | qemu_mutex_unlock_iothread(); | |
2003 | } | |
2004 | #endif | |
2005 | ||
7cbb533f | 2006 | if (run_ret < 0) { |
dc77d341 JK |
2007 | if (run_ret == -EINTR || run_ret == -EAGAIN) { |
2008 | DPRINTF("io window exit\n"); | |
18268b60 | 2009 | kvm_eat_signals(cpu); |
d73cd8f4 | 2010 | ret = EXCP_INTERRUPT; |
dc77d341 JK |
2011 | break; |
2012 | } | |
7b011fbc ME |
2013 | fprintf(stderr, "error: kvm run failed %s\n", |
2014 | strerror(-run_ret)); | |
dae02ba5 LV |
2015 | #ifdef TARGET_PPC |
2016 | if (run_ret == -EBUSY) { | |
2017 | fprintf(stderr, | |
2018 | "This is probably because your SMT is enabled.\n" | |
2019 | "VCPU can only run on primary threads with all " | |
2020 | "secondary threads offline.\n"); | |
2021 | } | |
2022 | #endif | |
a85e130e PB |
2023 | ret = -1; |
2024 | break; | |
05330448 AL |
2025 | } |
2026 | ||
b76ac80a | 2027 | trace_kvm_run_exit(cpu->cpu_index, run->exit_reason); |
05330448 AL |
2028 | switch (run->exit_reason) { |
2029 | case KVM_EXIT_IO: | |
8c0d577e | 2030 | DPRINTF("handle_io\n"); |
80b7d2ef | 2031 | /* Called outside BQL */ |
4c663752 | 2032 | kvm_handle_io(run->io.port, attrs, |
b30e93e9 JK |
2033 | (uint8_t *)run + run->io.data_offset, |
2034 | run->io.direction, | |
2035 | run->io.size, | |
2036 | run->io.count); | |
d73cd8f4 | 2037 | ret = 0; |
05330448 AL |
2038 | break; |
2039 | case KVM_EXIT_MMIO: | |
8c0d577e | 2040 | DPRINTF("handle_mmio\n"); |
de7ea885 | 2041 | /* Called outside BQL */ |
4c663752 PB |
2042 | address_space_rw(&address_space_memory, |
2043 | run->mmio.phys_addr, attrs, | |
2044 | run->mmio.data, | |
2045 | run->mmio.len, | |
2046 | run->mmio.is_write); | |
d73cd8f4 | 2047 | ret = 0; |
05330448 AL |
2048 | break; |
2049 | case KVM_EXIT_IRQ_WINDOW_OPEN: | |
8c0d577e | 2050 | DPRINTF("irq_window_open\n"); |
d73cd8f4 | 2051 | ret = EXCP_INTERRUPT; |
05330448 AL |
2052 | break; |
2053 | case KVM_EXIT_SHUTDOWN: | |
8c0d577e | 2054 | DPRINTF("shutdown\n"); |
cf83f140 | 2055 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
d73cd8f4 | 2056 | ret = EXCP_INTERRUPT; |
05330448 AL |
2057 | break; |
2058 | case KVM_EXIT_UNKNOWN: | |
bb44e0d1 JK |
2059 | fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", |
2060 | (uint64_t)run->hw.hardware_exit_reason); | |
73aaec4a | 2061 | ret = -1; |
05330448 | 2062 | break; |
7c80eef8 | 2063 | case KVM_EXIT_INTERNAL_ERROR: |
5326ab55 | 2064 | ret = kvm_handle_internal_error(cpu, run); |
7c80eef8 | 2065 | break; |
99040447 PS |
2066 | case KVM_EXIT_SYSTEM_EVENT: |
2067 | switch (run->system_event.type) { | |
2068 | case KVM_SYSTEM_EVENT_SHUTDOWN: | |
cf83f140 | 2069 | qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); |
99040447 PS |
2070 | ret = EXCP_INTERRUPT; |
2071 | break; | |
2072 | case KVM_SYSTEM_EVENT_RESET: | |
cf83f140 | 2073 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
99040447 PS |
2074 | ret = EXCP_INTERRUPT; |
2075 | break; | |
7c207b90 | 2076 | case KVM_SYSTEM_EVENT_CRASH: |
d187e08d | 2077 | kvm_cpu_synchronize_state(cpu); |
7c207b90 | 2078 | qemu_mutex_lock_iothread(); |
c86f106b | 2079 | qemu_system_guest_panicked(cpu_get_crash_info(cpu)); |
7c207b90 AS |
2080 | qemu_mutex_unlock_iothread(); |
2081 | ret = 0; | |
2082 | break; | |
99040447 PS |
2083 | default: |
2084 | DPRINTF("kvm_arch_handle_exit\n"); | |
2085 | ret = kvm_arch_handle_exit(cpu, run); | |
2086 | break; | |
2087 | } | |
2088 | break; | |
05330448 | 2089 | default: |
8c0d577e | 2090 | DPRINTF("kvm_arch_handle_exit\n"); |
20d695a9 | 2091 | ret = kvm_arch_handle_exit(cpu, run); |
05330448 AL |
2092 | break; |
2093 | } | |
d73cd8f4 | 2094 | } while (ret == 0); |
05330448 | 2095 | |
1d78a3c3 | 2096 | cpu_exec_end(cpu); |
4b8523ee JK |
2097 | qemu_mutex_lock_iothread(); |
2098 | ||
73aaec4a | 2099 | if (ret < 0) { |
90c84c56 | 2100 | cpu_dump_state(cpu, stderr, CPU_DUMP_CODE); |
0461d5a6 | 2101 | vm_stop(RUN_STATE_INTERNAL_ERROR); |
becfc390 AL |
2102 | } |
2103 | ||
c5c6679d | 2104 | atomic_set(&cpu->exit_request, 0); |
05330448 AL |
2105 | return ret; |
2106 | } | |
2107 | ||
984b5181 | 2108 | int kvm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
2109 | { |
2110 | int ret; | |
984b5181 AL |
2111 | void *arg; |
2112 | va_list ap; | |
05330448 | 2113 | |
984b5181 AL |
2114 | va_start(ap, type); |
2115 | arg = va_arg(ap, void *); | |
2116 | va_end(ap); | |
2117 | ||
9c775729 | 2118 | trace_kvm_ioctl(type, arg); |
984b5181 | 2119 | ret = ioctl(s->fd, type, arg); |
a426e122 | 2120 | if (ret == -1) { |
05330448 | 2121 | ret = -errno; |
a426e122 | 2122 | } |
05330448 AL |
2123 | return ret; |
2124 | } | |
2125 | ||
984b5181 | 2126 | int kvm_vm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
2127 | { |
2128 | int ret; | |
984b5181 AL |
2129 | void *arg; |
2130 | va_list ap; | |
2131 | ||
2132 | va_start(ap, type); | |
2133 | arg = va_arg(ap, void *); | |
2134 | va_end(ap); | |
05330448 | 2135 | |
9c775729 | 2136 | trace_kvm_vm_ioctl(type, arg); |
984b5181 | 2137 | ret = ioctl(s->vmfd, type, arg); |
a426e122 | 2138 | if (ret == -1) { |
05330448 | 2139 | ret = -errno; |
a426e122 | 2140 | } |
05330448 AL |
2141 | return ret; |
2142 | } | |
2143 | ||
1bc22652 | 2144 | int kvm_vcpu_ioctl(CPUState *cpu, int type, ...) |
05330448 AL |
2145 | { |
2146 | int ret; | |
984b5181 AL |
2147 | void *arg; |
2148 | va_list ap; | |
2149 | ||
2150 | va_start(ap, type); | |
2151 | arg = va_arg(ap, void *); | |
2152 | va_end(ap); | |
05330448 | 2153 | |
9c775729 | 2154 | trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg); |
8737c51c | 2155 | ret = ioctl(cpu->kvm_fd, type, arg); |
a426e122 | 2156 | if (ret == -1) { |
05330448 | 2157 | ret = -errno; |
a426e122 | 2158 | } |
05330448 AL |
2159 | return ret; |
2160 | } | |
bd322087 | 2161 | |
0a6a7cca CD |
2162 | int kvm_device_ioctl(int fd, int type, ...) |
2163 | { | |
2164 | int ret; | |
2165 | void *arg; | |
2166 | va_list ap; | |
2167 | ||
2168 | va_start(ap, type); | |
2169 | arg = va_arg(ap, void *); | |
2170 | va_end(ap); | |
2171 | ||
2172 | trace_kvm_device_ioctl(fd, type, arg); | |
2173 | ret = ioctl(fd, type, arg); | |
2174 | if (ret == -1) { | |
2175 | ret = -errno; | |
2176 | } | |
2177 | return ret; | |
2178 | } | |
2179 | ||
d0a073a1 DD |
2180 | int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr) |
2181 | { | |
2182 | int ret; | |
2183 | struct kvm_device_attr attribute = { | |
2184 | .group = group, | |
2185 | .attr = attr, | |
2186 | }; | |
2187 | ||
2188 | if (!kvm_vm_attributes_allowed) { | |
2189 | return 0; | |
2190 | } | |
2191 | ||
2192 | ret = kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attribute); | |
2193 | /* kvm returns 0 on success for HAS_DEVICE_ATTR */ | |
2194 | return ret ? 0 : 1; | |
2195 | } | |
2196 | ||
4b3cfe72 PF |
2197 | int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr) |
2198 | { | |
2199 | struct kvm_device_attr attribute = { | |
2200 | .group = group, | |
2201 | .attr = attr, | |
2202 | .flags = 0, | |
2203 | }; | |
2204 | ||
2205 | return kvm_device_ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute) ? 0 : 1; | |
2206 | } | |
2207 | ||
556969e9 EA |
2208 | int kvm_device_access(int fd, int group, uint64_t attr, |
2209 | void *val, bool write, Error **errp) | |
4b3cfe72 PF |
2210 | { |
2211 | struct kvm_device_attr kvmattr; | |
2212 | int err; | |
2213 | ||
2214 | kvmattr.flags = 0; | |
2215 | kvmattr.group = group; | |
2216 | kvmattr.attr = attr; | |
2217 | kvmattr.addr = (uintptr_t)val; | |
2218 | ||
2219 | err = kvm_device_ioctl(fd, | |
2220 | write ? KVM_SET_DEVICE_ATTR : KVM_GET_DEVICE_ATTR, | |
2221 | &kvmattr); | |
2222 | if (err < 0) { | |
556969e9 EA |
2223 | error_setg_errno(errp, -err, |
2224 | "KVM_%s_DEVICE_ATTR failed: Group %d " | |
2225 | "attr 0x%016" PRIx64, | |
2226 | write ? "SET" : "GET", group, attr); | |
4b3cfe72 | 2227 | } |
556969e9 | 2228 | return err; |
4b3cfe72 PF |
2229 | } |
2230 | ||
62dd4eda | 2231 | bool kvm_has_sync_mmu(void) |
bd322087 | 2232 | { |
62dd4eda | 2233 | return kvm_state->sync_mmu; |
bd322087 | 2234 | } |
e22a25c9 | 2235 | |
a0fb002c JK |
2236 | int kvm_has_vcpu_events(void) |
2237 | { | |
2238 | return kvm_state->vcpu_events; | |
2239 | } | |
2240 | ||
b0b1d690 JK |
2241 | int kvm_has_robust_singlestep(void) |
2242 | { | |
2243 | return kvm_state->robust_singlestep; | |
2244 | } | |
2245 | ||
ff44f1a3 JK |
2246 | int kvm_has_debugregs(void) |
2247 | { | |
2248 | return kvm_state->debugregs; | |
2249 | } | |
2250 | ||
d2f2b8a7 SH |
2251 | int kvm_has_many_ioeventfds(void) |
2252 | { | |
2253 | if (!kvm_enabled()) { | |
2254 | return 0; | |
2255 | } | |
2256 | return kvm_state->many_ioeventfds; | |
2257 | } | |
2258 | ||
84b058d7 JK |
2259 | int kvm_has_gsi_routing(void) |
2260 | { | |
a9c5eb0d | 2261 | #ifdef KVM_CAP_IRQ_ROUTING |
84b058d7 | 2262 | return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING); |
a9c5eb0d AG |
2263 | #else |
2264 | return false; | |
2265 | #endif | |
84b058d7 JK |
2266 | } |
2267 | ||
3ab73842 JK |
2268 | int kvm_has_intx_set_mask(void) |
2269 | { | |
2270 | return kvm_state->intx_set_mask; | |
2271 | } | |
2272 | ||
5d721b78 AG |
2273 | bool kvm_arm_supports_user_irq(void) |
2274 | { | |
2275 | return kvm_check_extension(kvm_state, KVM_CAP_ARM_USER_IRQ); | |
2276 | } | |
2277 | ||
e22a25c9 | 2278 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
a60f24b5 | 2279 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu, |
e22a25c9 AL |
2280 | target_ulong pc) |
2281 | { | |
2282 | struct kvm_sw_breakpoint *bp; | |
2283 | ||
a60f24b5 | 2284 | QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) { |
a426e122 | 2285 | if (bp->pc == pc) { |
e22a25c9 | 2286 | return bp; |
a426e122 | 2287 | } |
e22a25c9 AL |
2288 | } |
2289 | return NULL; | |
2290 | } | |
2291 | ||
a60f24b5 | 2292 | int kvm_sw_breakpoints_active(CPUState *cpu) |
e22a25c9 | 2293 | { |
a60f24b5 | 2294 | return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints); |
e22a25c9 AL |
2295 | } |
2296 | ||
452e4751 GC |
2297 | struct kvm_set_guest_debug_data { |
2298 | struct kvm_guest_debug dbg; | |
452e4751 GC |
2299 | int err; |
2300 | }; | |
2301 | ||
14e6fe12 | 2302 | static void kvm_invoke_set_guest_debug(CPUState *cpu, run_on_cpu_data data) |
452e4751 | 2303 | { |
14e6fe12 PB |
2304 | struct kvm_set_guest_debug_data *dbg_data = |
2305 | (struct kvm_set_guest_debug_data *) data.host_ptr; | |
b3807725 | 2306 | |
3c0ed2a3 | 2307 | dbg_data->err = kvm_vcpu_ioctl(cpu, KVM_SET_GUEST_DEBUG, |
a60f24b5 | 2308 | &dbg_data->dbg); |
452e4751 GC |
2309 | } |
2310 | ||
38e478ec | 2311 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 | 2312 | { |
452e4751 | 2313 | struct kvm_set_guest_debug_data data; |
e22a25c9 | 2314 | |
b0b1d690 | 2315 | data.dbg.control = reinject_trap; |
e22a25c9 | 2316 | |
ed2803da | 2317 | if (cpu->singlestep_enabled) { |
b0b1d690 JK |
2318 | data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
2319 | } | |
20d695a9 | 2320 | kvm_arch_update_guest_debug(cpu, &data.dbg); |
e22a25c9 | 2321 | |
14e6fe12 PB |
2322 | run_on_cpu(cpu, kvm_invoke_set_guest_debug, |
2323 | RUN_ON_CPU_HOST_PTR(&data)); | |
452e4751 | 2324 | return data.err; |
e22a25c9 AL |
2325 | } |
2326 | ||
62278814 | 2327 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2328 | target_ulong len, int type) |
2329 | { | |
2330 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
2331 | int err; |
2332 | ||
2333 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 2334 | bp = kvm_find_sw_breakpoint(cpu, addr); |
e22a25c9 AL |
2335 | if (bp) { |
2336 | bp->use_count++; | |
2337 | return 0; | |
2338 | } | |
2339 | ||
7267c094 | 2340 | bp = g_malloc(sizeof(struct kvm_sw_breakpoint)); |
e22a25c9 AL |
2341 | bp->pc = addr; |
2342 | bp->use_count = 1; | |
80b7cd73 | 2343 | err = kvm_arch_insert_sw_breakpoint(cpu, bp); |
e22a25c9 | 2344 | if (err) { |
7267c094 | 2345 | g_free(bp); |
e22a25c9 AL |
2346 | return err; |
2347 | } | |
2348 | ||
80b7cd73 | 2349 | QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
e22a25c9 AL |
2350 | } else { |
2351 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); | |
a426e122 | 2352 | if (err) { |
e22a25c9 | 2353 | return err; |
a426e122 | 2354 | } |
e22a25c9 AL |
2355 | } |
2356 | ||
bdc44640 | 2357 | CPU_FOREACH(cpu) { |
38e478ec | 2358 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 2359 | if (err) { |
e22a25c9 | 2360 | return err; |
a426e122 | 2361 | } |
e22a25c9 AL |
2362 | } |
2363 | return 0; | |
2364 | } | |
2365 | ||
62278814 | 2366 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2367 | target_ulong len, int type) |
2368 | { | |
2369 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
2370 | int err; |
2371 | ||
2372 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 2373 | bp = kvm_find_sw_breakpoint(cpu, addr); |
a426e122 | 2374 | if (!bp) { |
e22a25c9 | 2375 | return -ENOENT; |
a426e122 | 2376 | } |
e22a25c9 AL |
2377 | |
2378 | if (bp->use_count > 1) { | |
2379 | bp->use_count--; | |
2380 | return 0; | |
2381 | } | |
2382 | ||
80b7cd73 | 2383 | err = kvm_arch_remove_sw_breakpoint(cpu, bp); |
a426e122 | 2384 | if (err) { |
e22a25c9 | 2385 | return err; |
a426e122 | 2386 | } |
e22a25c9 | 2387 | |
80b7cd73 | 2388 | QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
7267c094 | 2389 | g_free(bp); |
e22a25c9 AL |
2390 | } else { |
2391 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); | |
a426e122 | 2392 | if (err) { |
e22a25c9 | 2393 | return err; |
a426e122 | 2394 | } |
e22a25c9 AL |
2395 | } |
2396 | ||
bdc44640 | 2397 | CPU_FOREACH(cpu) { |
38e478ec | 2398 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 2399 | if (err) { |
e22a25c9 | 2400 | return err; |
a426e122 | 2401 | } |
e22a25c9 AL |
2402 | } |
2403 | return 0; | |
2404 | } | |
2405 | ||
1d5791f4 | 2406 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
2407 | { |
2408 | struct kvm_sw_breakpoint *bp, *next; | |
80b7cd73 | 2409 | KVMState *s = cpu->kvm_state; |
dc54e252 | 2410 | CPUState *tmpcpu; |
e22a25c9 | 2411 | |
72cf2d4f | 2412 | QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
80b7cd73 | 2413 | if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) { |
e22a25c9 | 2414 | /* Try harder to find a CPU that currently sees the breakpoint. */ |
dc54e252 CG |
2415 | CPU_FOREACH(tmpcpu) { |
2416 | if (kvm_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) { | |
e22a25c9 | 2417 | break; |
a426e122 | 2418 | } |
e22a25c9 AL |
2419 | } |
2420 | } | |
78021d6d JK |
2421 | QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry); |
2422 | g_free(bp); | |
e22a25c9 AL |
2423 | } |
2424 | kvm_arch_remove_all_hw_breakpoints(); | |
2425 | ||
bdc44640 | 2426 | CPU_FOREACH(cpu) { |
38e478ec | 2427 | kvm_update_guest_debug(cpu, 0); |
a426e122 | 2428 | } |
e22a25c9 AL |
2429 | } |
2430 | ||
2431 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ | |
2432 | ||
38e478ec | 2433 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 AL |
2434 | { |
2435 | return -EINVAL; | |
2436 | } | |
2437 | ||
62278814 | 2438 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2439 | target_ulong len, int type) |
2440 | { | |
2441 | return -EINVAL; | |
2442 | } | |
2443 | ||
62278814 | 2444 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2445 | target_ulong len, int type) |
2446 | { | |
2447 | return -EINVAL; | |
2448 | } | |
2449 | ||
1d5791f4 | 2450 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
2451 | { |
2452 | } | |
2453 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ | |
cc84de95 | 2454 | |
18268b60 | 2455 | static int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset) |
cc84de95 | 2456 | { |
aed6efb9 | 2457 | KVMState *s = kvm_state; |
cc84de95 MT |
2458 | struct kvm_signal_mask *sigmask; |
2459 | int r; | |
2460 | ||
7267c094 | 2461 | sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset)); |
cc84de95 | 2462 | |
aed6efb9 | 2463 | sigmask->len = s->sigmask_len; |
cc84de95 | 2464 | memcpy(sigmask->sigset, sigset, sizeof(*sigset)); |
1bc22652 | 2465 | r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask); |
7267c094 | 2466 | g_free(sigmask); |
cc84de95 MT |
2467 | |
2468 | return r; | |
2469 | } | |
4d39892c | 2470 | |
cf0f7cf9 | 2471 | static void kvm_ipi_signal(int sig) |
18268b60 | 2472 | { |
cf0f7cf9 PB |
2473 | if (current_cpu) { |
2474 | assert(kvm_immediate_exit); | |
2475 | kvm_cpu_kick(current_cpu); | |
2476 | } | |
18268b60 PB |
2477 | } |
2478 | ||
2479 | void kvm_init_cpu_signals(CPUState *cpu) | |
2480 | { | |
2481 | int r; | |
2482 | sigset_t set; | |
2483 | struct sigaction sigact; | |
2484 | ||
2485 | memset(&sigact, 0, sizeof(sigact)); | |
cf0f7cf9 | 2486 | sigact.sa_handler = kvm_ipi_signal; |
18268b60 PB |
2487 | sigaction(SIG_IPI, &sigact, NULL); |
2488 | ||
2489 | pthread_sigmask(SIG_BLOCK, NULL, &set); | |
2490 | #if defined KVM_HAVE_MCE_INJECTION | |
2491 | sigdelset(&set, SIGBUS); | |
2492 | pthread_sigmask(SIG_SETMASK, &set, NULL); | |
2493 | #endif | |
2494 | sigdelset(&set, SIG_IPI); | |
cf0f7cf9 PB |
2495 | if (kvm_immediate_exit) { |
2496 | r = pthread_sigmask(SIG_SETMASK, &set, NULL); | |
2497 | } else { | |
2498 | r = kvm_set_signal_mask(cpu, &set); | |
2499 | } | |
18268b60 PB |
2500 | if (r) { |
2501 | fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r)); | |
2502 | exit(1); | |
2503 | } | |
2504 | } | |
2505 | ||
2ae41db2 | 2506 | /* Called asynchronously in VCPU thread. */ |
290adf38 | 2507 | int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) |
a1b87fe0 | 2508 | { |
2ae41db2 PB |
2509 | #ifdef KVM_HAVE_MCE_INJECTION |
2510 | if (have_sigbus_pending) { | |
2511 | return 1; | |
2512 | } | |
2513 | have_sigbus_pending = true; | |
2514 | pending_sigbus_addr = addr; | |
2515 | pending_sigbus_code = code; | |
2516 | atomic_set(&cpu->exit_request, 1); | |
2517 | return 0; | |
2518 | #else | |
2519 | return 1; | |
2520 | #endif | |
a1b87fe0 JK |
2521 | } |
2522 | ||
2ae41db2 | 2523 | /* Called synchronously (via signalfd) in main thread. */ |
a1b87fe0 JK |
2524 | int kvm_on_sigbus(int code, void *addr) |
2525 | { | |
2ae41db2 | 2526 | #ifdef KVM_HAVE_MCE_INJECTION |
4d39892c PB |
2527 | /* Action required MCE kills the process if SIGBUS is blocked. Because |
2528 | * that's what happens in the I/O thread, where we handle MCE via signalfd, | |
2529 | * we can only get action optional here. | |
2530 | */ | |
2531 | assert(code != BUS_MCEERR_AR); | |
2532 | kvm_arch_on_sigbus_vcpu(first_cpu, code, addr); | |
2533 | return 0; | |
2ae41db2 PB |
2534 | #else |
2535 | return 1; | |
2536 | #endif | |
a1b87fe0 | 2537 | } |
0a6a7cca CD |
2538 | |
2539 | int kvm_create_device(KVMState *s, uint64_t type, bool test) | |
2540 | { | |
2541 | int ret; | |
2542 | struct kvm_create_device create_dev; | |
2543 | ||
2544 | create_dev.type = type; | |
2545 | create_dev.fd = -1; | |
2546 | create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0; | |
2547 | ||
2548 | if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) { | |
2549 | return -ENOTSUP; | |
2550 | } | |
2551 | ||
2552 | ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev); | |
2553 | if (ret) { | |
2554 | return ret; | |
2555 | } | |
2556 | ||
2557 | return test ? 0 : create_dev.fd; | |
2558 | } | |
ada4135f | 2559 | |
29039acf PX |
2560 | bool kvm_device_supported(int vmfd, uint64_t type) |
2561 | { | |
2562 | struct kvm_create_device create_dev = { | |
2563 | .type = type, | |
2564 | .fd = -1, | |
2565 | .flags = KVM_CREATE_DEVICE_TEST, | |
2566 | }; | |
2567 | ||
2568 | if (ioctl(vmfd, KVM_CHECK_EXTENSION, KVM_CAP_DEVICE_CTRL) <= 0) { | |
2569 | return false; | |
2570 | } | |
2571 | ||
2572 | return (ioctl(vmfd, KVM_CREATE_DEVICE, &create_dev) >= 0); | |
2573 | } | |
2574 | ||
ada4135f CH |
2575 | int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source) |
2576 | { | |
2577 | struct kvm_one_reg reg; | |
2578 | int r; | |
2579 | ||
2580 | reg.id = id; | |
2581 | reg.addr = (uintptr_t) source; | |
2582 | r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); | |
2583 | if (r) { | |
844a3d34 | 2584 | trace_kvm_failed_reg_set(id, strerror(-r)); |
ada4135f CH |
2585 | } |
2586 | return r; | |
2587 | } | |
2588 | ||
2589 | int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target) | |
2590 | { | |
2591 | struct kvm_one_reg reg; | |
2592 | int r; | |
2593 | ||
2594 | reg.id = id; | |
2595 | reg.addr = (uintptr_t) target; | |
2596 | r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); | |
2597 | if (r) { | |
844a3d34 | 2598 | trace_kvm_failed_reg_get(id, strerror(-r)); |
ada4135f CH |
2599 | } |
2600 | return r; | |
2601 | } | |
782c3f29 EH |
2602 | |
2603 | static void kvm_accel_class_init(ObjectClass *oc, void *data) | |
2604 | { | |
2605 | AccelClass *ac = ACCEL_CLASS(oc); | |
2606 | ac->name = "KVM"; | |
0d15da8e | 2607 | ac->init_machine = kvm_init; |
782c3f29 EH |
2608 | ac->allowed = &kvm_allowed; |
2609 | } | |
2610 | ||
2611 | static const TypeInfo kvm_accel_type = { | |
2612 | .name = TYPE_KVM_ACCEL, | |
2613 | .parent = TYPE_ACCEL, | |
2614 | .class_init = kvm_accel_class_init, | |
fc02086b | 2615 | .instance_size = sizeof(KVMState), |
782c3f29 EH |
2616 | }; |
2617 | ||
2618 | static void kvm_type_init(void) | |
2619 | { | |
2620 | type_register_static(&kvm_accel_type); | |
2621 | } | |
2622 | ||
2623 | type_init(kvm_type_init); |