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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 | ||
21 | #include "qemu-common.h" | |
1de7afc9 PB |
22 | #include "qemu/atomic.h" |
23 | #include "qemu/option.h" | |
24 | #include "qemu/config-file.h" | |
4b3cfe72 | 25 | #include "qemu/error-report.h" |
556969e9 | 26 | #include "qapi/error.h" |
d33a1810 | 27 | #include "hw/hw.h" |
a2cb15b0 | 28 | #include "hw/pci/msi.h" |
d1f6af6a | 29 | #include "hw/pci/msix.h" |
d426d9fb | 30 | #include "hw/s390x/adapter.h" |
022c62cb | 31 | #include "exec/gdbstub.h" |
8571ed35 | 32 | #include "sysemu/kvm_int.h" |
d2528bdc | 33 | #include "sysemu/cpus.h" |
1de7afc9 | 34 | #include "qemu/bswap.h" |
022c62cb | 35 | #include "exec/memory.h" |
747afd5b | 36 | #include "exec/ram_addr.h" |
022c62cb | 37 | #include "exec/address-spaces.h" |
1de7afc9 | 38 | #include "qemu/event_notifier.h" |
92229a57 | 39 | #include "trace.h" |
197e3524 | 40 | #include "hw/irq.h" |
05330448 | 41 | |
135a129a AK |
42 | #include "hw/boards.h" |
43 | ||
d2f2b8a7 SH |
44 | /* This check must be after config-host.h is included */ |
45 | #ifdef CONFIG_EVENTFD | |
46 | #include <sys/eventfd.h> | |
47 | #endif | |
48 | ||
bc92e4e9 AJ |
49 | /* KVM uses PAGE_SIZE in its definition of KVM_COALESCED_MMIO_MAX. We |
50 | * need to use the real host PAGE_SIZE, as that's what KVM will use. | |
51 | */ | |
52 | #define PAGE_SIZE getpagesize() | |
f65ed4c1 | 53 | |
05330448 AL |
54 | //#define DEBUG_KVM |
55 | ||
56 | #ifdef DEBUG_KVM | |
8c0d577e | 57 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
58 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
59 | #else | |
8c0d577e | 60 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
61 | do { } while (0) |
62 | #endif | |
63 | ||
04fa27f5 JK |
64 | #define KVM_MSI_HASHTAB_SIZE 256 |
65 | ||
4c055ab5 GZ |
66 | struct KVMParkedVcpu { |
67 | unsigned long vcpu_id; | |
68 | int kvm_fd; | |
69 | QLIST_ENTRY(KVMParkedVcpu) node; | |
70 | }; | |
71 | ||
9d1c35df | 72 | struct KVMState |
05330448 | 73 | { |
fc02086b EH |
74 | AccelState parent_obj; |
75 | ||
fb541ca5 | 76 | int nr_slots; |
05330448 AL |
77 | int fd; |
78 | int vmfd; | |
f65ed4c1 | 79 | int coalesced_mmio; |
62a2744c | 80 | struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; |
1cae88b9 | 81 | bool coalesced_flush_in_progress; |
a0fb002c | 82 | int vcpu_events; |
b0b1d690 | 83 | int robust_singlestep; |
ff44f1a3 | 84 | int debugregs; |
e22a25c9 AL |
85 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
86 | struct kvm_sw_breakpoint_head kvm_sw_breakpoints; | |
87 | #endif | |
d2f2b8a7 | 88 | int many_ioeventfds; |
3ab73842 | 89 | int intx_set_mask; |
62dd4eda | 90 | bool sync_mmu; |
92e4b519 DG |
91 | /* The man page (and posix) say ioctl numbers are signed int, but |
92 | * they're not. Linux, glibc and *BSD all treat ioctl numbers as | |
93 | * unsigned, and treating them as signed here can break things */ | |
e333cd69 | 94 | unsigned irq_set_ioctl; |
aed6efb9 | 95 | unsigned int sigmask_len; |
197e3524 | 96 | GHashTable *gsimap; |
84b058d7 JK |
97 | #ifdef KVM_CAP_IRQ_ROUTING |
98 | struct kvm_irq_routing *irq_routes; | |
99 | int nr_allocated_irq_routes; | |
8269fb70 | 100 | unsigned long *used_gsi_bitmap; |
4e2e4e63 | 101 | unsigned int gsi_count; |
04fa27f5 | 102 | QTAILQ_HEAD(msi_hashtab, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE]; |
84b058d7 | 103 | #endif |
7bbda04c | 104 | KVMMemoryListener memory_listener; |
4c055ab5 | 105 | QLIST_HEAD(, KVMParkedVcpu) kvm_parked_vcpus; |
9d1c35df | 106 | }; |
05330448 | 107 | |
6a7af8cb | 108 | KVMState *kvm_state; |
3d4b2649 | 109 | bool kvm_kernel_irqchip; |
15eafc2e | 110 | bool kvm_split_irqchip; |
7ae26bd4 | 111 | bool kvm_async_interrupts_allowed; |
215e79c0 | 112 | bool kvm_halt_in_kernel_allowed; |
69e03ae6 | 113 | bool kvm_eventfds_allowed; |
cc7e0ddf | 114 | bool kvm_irqfds_allowed; |
f41389ae | 115 | bool kvm_resamplefds_allowed; |
614e41bc | 116 | bool kvm_msi_via_irqfd_allowed; |
f3e1bed8 | 117 | bool kvm_gsi_routing_allowed; |
76fe21de | 118 | bool kvm_gsi_direct_mapping; |
13eed94e | 119 | bool kvm_allowed; |
df9c8b75 | 120 | bool kvm_readonly_mem_allowed; |
d0a073a1 | 121 | bool kvm_vm_attributes_allowed; |
50bf31b9 | 122 | bool kvm_direct_msi_allowed; |
35108223 | 123 | bool kvm_ioeventfd_any_length_allowed; |
767a554a | 124 | bool kvm_msi_use_devid; |
cf0f7cf9 | 125 | static bool kvm_immediate_exit; |
05330448 | 126 | |
94a8d39a JK |
127 | static const KVMCapabilityInfo kvm_required_capabilites[] = { |
128 | KVM_CAP_INFO(USER_MEMORY), | |
129 | KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS), | |
89de4b91 | 130 | KVM_CAP_INFO(JOIN_MEMORY_REGIONS_WORKS), |
94a8d39a JK |
131 | KVM_CAP_LAST_INFO |
132 | }; | |
133 | ||
44f2e6c1 BR |
134 | int kvm_get_max_memslots(void) |
135 | { | |
136 | KVMState *s = KVM_STATE(current_machine->accelerator); | |
137 | ||
138 | return s->nr_slots; | |
139 | } | |
140 | ||
7bbda04c | 141 | static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml) |
05330448 | 142 | { |
7bbda04c | 143 | KVMState *s = kvm_state; |
05330448 AL |
144 | int i; |
145 | ||
fb541ca5 | 146 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c PB |
147 | if (kml->slots[i].memory_size == 0) { |
148 | return &kml->slots[i]; | |
a426e122 | 149 | } |
05330448 AL |
150 | } |
151 | ||
b8865591 IM |
152 | return NULL; |
153 | } | |
154 | ||
155 | bool kvm_has_free_slot(MachineState *ms) | |
156 | { | |
7bbda04c PB |
157 | KVMState *s = KVM_STATE(ms->accelerator); |
158 | ||
159 | return kvm_get_free_slot(&s->memory_listener); | |
b8865591 IM |
160 | } |
161 | ||
7bbda04c | 162 | static KVMSlot *kvm_alloc_slot(KVMMemoryListener *kml) |
b8865591 | 163 | { |
7bbda04c | 164 | KVMSlot *slot = kvm_get_free_slot(kml); |
b8865591 IM |
165 | |
166 | if (slot) { | |
167 | return slot; | |
168 | } | |
169 | ||
d3f8d37f AL |
170 | fprintf(stderr, "%s: no free slot available\n", __func__); |
171 | abort(); | |
172 | } | |
173 | ||
7bbda04c | 174 | static KVMSlot *kvm_lookup_matching_slot(KVMMemoryListener *kml, |
a8170e5e | 175 | hwaddr start_addr, |
2747e716 | 176 | hwaddr size) |
d3f8d37f | 177 | { |
7bbda04c | 178 | KVMState *s = kvm_state; |
d3f8d37f AL |
179 | int i; |
180 | ||
fb541ca5 | 181 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c | 182 | KVMSlot *mem = &kml->slots[i]; |
d3f8d37f | 183 | |
2747e716 | 184 | if (start_addr == mem->start_addr && size == mem->memory_size) { |
d3f8d37f AL |
185 | return mem; |
186 | } | |
187 | } | |
188 | ||
05330448 AL |
189 | return NULL; |
190 | } | |
191 | ||
5ea69c2e DH |
192 | /* |
193 | * Calculate and align the start address and the size of the section. | |
194 | * Return the size. If the size is 0, the aligned section is empty. | |
195 | */ | |
196 | static hwaddr kvm_align_section(MemoryRegionSection *section, | |
197 | hwaddr *start) | |
198 | { | |
199 | hwaddr size = int128_get64(section->size); | |
a6ffc423 | 200 | hwaddr delta, aligned; |
5ea69c2e DH |
201 | |
202 | /* kvm works in page size chunks, but the function may be called | |
203 | with sub-page size and unaligned start address. Pad the start | |
204 | address to next and truncate size to previous page boundary. */ | |
a6ffc423 DH |
205 | aligned = ROUND_UP(section->offset_within_address_space, |
206 | qemu_real_host_page_size); | |
207 | delta = aligned - section->offset_within_address_space; | |
208 | *start = aligned; | |
5ea69c2e DH |
209 | if (delta > size) { |
210 | return 0; | |
211 | } | |
5ea69c2e | 212 | |
a6ffc423 | 213 | return (size - delta) & qemu_real_host_page_mask; |
5ea69c2e DH |
214 | } |
215 | ||
9f213ed9 | 216 | int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, |
a8170e5e | 217 | hwaddr *phys_addr) |
983dfc3b | 218 | { |
7bbda04c | 219 | KVMMemoryListener *kml = &s->memory_listener; |
983dfc3b HY |
220 | int i; |
221 | ||
fb541ca5 | 222 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c | 223 | KVMSlot *mem = &kml->slots[i]; |
983dfc3b | 224 | |
9f213ed9 AK |
225 | if (ram >= mem->ram && ram < mem->ram + mem->memory_size) { |
226 | *phys_addr = mem->start_addr + (ram - mem->ram); | |
983dfc3b HY |
227 | return 1; |
228 | } | |
229 | } | |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
7bbda04c | 234 | static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot) |
5832d1f2 | 235 | { |
7bbda04c | 236 | KVMState *s = kvm_state; |
5832d1f2 | 237 | struct kvm_userspace_memory_region mem; |
fe29141b | 238 | int ret; |
5832d1f2 | 239 | |
38bfe691 | 240 | mem.slot = slot->slot | (kml->as_id << 16); |
5832d1f2 | 241 | mem.guest_phys_addr = slot->start_addr; |
9f213ed9 | 242 | mem.userspace_addr = (unsigned long)slot->ram; |
5832d1f2 | 243 | mem.flags = slot->flags; |
651eb0f4 XG |
244 | |
245 | if (slot->memory_size && mem.flags & KVM_MEM_READONLY) { | |
235e8982 JJ |
246 | /* Set the slot size to 0 before setting the slot to the desired |
247 | * value. This is needed based on KVM commit 75d61fbc. */ | |
248 | mem.memory_size = 0; | |
249 | kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); | |
250 | } | |
251 | mem.memory_size = slot->memory_size; | |
fe29141b AK |
252 | ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); |
253 | trace_kvm_set_user_memory(mem.slot, mem.flags, mem.guest_phys_addr, | |
254 | mem.memory_size, mem.userspace_addr, ret); | |
255 | return ret; | |
5832d1f2 AL |
256 | } |
257 | ||
4c055ab5 GZ |
258 | int kvm_destroy_vcpu(CPUState *cpu) |
259 | { | |
260 | KVMState *s = kvm_state; | |
261 | long mmap_size; | |
262 | struct KVMParkedVcpu *vcpu = NULL; | |
263 | int ret = 0; | |
264 | ||
265 | DPRINTF("kvm_destroy_vcpu\n"); | |
266 | ||
267 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
268 | if (mmap_size < 0) { | |
269 | ret = mmap_size; | |
270 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); | |
271 | goto err; | |
272 | } | |
273 | ||
274 | ret = munmap(cpu->kvm_run, mmap_size); | |
275 | if (ret < 0) { | |
276 | goto err; | |
277 | } | |
278 | ||
279 | vcpu = g_malloc0(sizeof(*vcpu)); | |
280 | vcpu->vcpu_id = kvm_arch_vcpu_id(cpu); | |
281 | vcpu->kvm_fd = cpu->kvm_fd; | |
282 | QLIST_INSERT_HEAD(&kvm_state->kvm_parked_vcpus, vcpu, node); | |
283 | err: | |
284 | return ret; | |
285 | } | |
286 | ||
287 | static int kvm_get_vcpu(KVMState *s, unsigned long vcpu_id) | |
288 | { | |
289 | struct KVMParkedVcpu *cpu; | |
290 | ||
291 | QLIST_FOREACH(cpu, &s->kvm_parked_vcpus, node) { | |
292 | if (cpu->vcpu_id == vcpu_id) { | |
293 | int kvm_fd; | |
294 | ||
295 | QLIST_REMOVE(cpu, node); | |
296 | kvm_fd = cpu->kvm_fd; | |
297 | g_free(cpu); | |
298 | return kvm_fd; | |
299 | } | |
300 | } | |
301 | ||
302 | return kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)vcpu_id); | |
303 | } | |
304 | ||
504134d2 | 305 | int kvm_init_vcpu(CPUState *cpu) |
05330448 AL |
306 | { |
307 | KVMState *s = kvm_state; | |
308 | long mmap_size; | |
309 | int ret; | |
310 | ||
8c0d577e | 311 | DPRINTF("kvm_init_vcpu\n"); |
05330448 | 312 | |
4c055ab5 | 313 | ret = kvm_get_vcpu(s, kvm_arch_vcpu_id(cpu)); |
05330448 | 314 | if (ret < 0) { |
8c0d577e | 315 | DPRINTF("kvm_create_vcpu failed\n"); |
05330448 AL |
316 | goto err; |
317 | } | |
318 | ||
8737c51c | 319 | cpu->kvm_fd = ret; |
a60f24b5 | 320 | cpu->kvm_state = s; |
99f31832 | 321 | cpu->vcpu_dirty = true; |
05330448 AL |
322 | |
323 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
324 | if (mmap_size < 0) { | |
748a680b | 325 | ret = mmap_size; |
8c0d577e | 326 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); |
05330448 AL |
327 | goto err; |
328 | } | |
329 | ||
f7575c96 | 330 | cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, |
8737c51c | 331 | cpu->kvm_fd, 0); |
f7575c96 | 332 | if (cpu->kvm_run == MAP_FAILED) { |
05330448 | 333 | ret = -errno; |
8c0d577e | 334 | DPRINTF("mmap'ing vcpu state failed\n"); |
05330448 AL |
335 | goto err; |
336 | } | |
337 | ||
a426e122 JK |
338 | if (s->coalesced_mmio && !s->coalesced_mmio_ring) { |
339 | s->coalesced_mmio_ring = | |
f7575c96 | 340 | (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE; |
a426e122 | 341 | } |
62a2744c | 342 | |
20d695a9 | 343 | ret = kvm_arch_init_vcpu(cpu); |
05330448 AL |
344 | err: |
345 | return ret; | |
346 | } | |
347 | ||
5832d1f2 AL |
348 | /* |
349 | * dirty pages logging control | |
350 | */ | |
25254bbc | 351 | |
d6ff5cbc | 352 | static int kvm_mem_flags(MemoryRegion *mr) |
25254bbc | 353 | { |
d6ff5cbc | 354 | bool readonly = mr->readonly || memory_region_is_romd(mr); |
235e8982 | 355 | int flags = 0; |
d6ff5cbc AJ |
356 | |
357 | if (memory_region_get_dirty_log_mask(mr) != 0) { | |
358 | flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
359 | } | |
235e8982 JJ |
360 | if (readonly && kvm_readonly_mem_allowed) { |
361 | flags |= KVM_MEM_READONLY; | |
362 | } | |
363 | return flags; | |
25254bbc MT |
364 | } |
365 | ||
7bbda04c PB |
366 | static int kvm_slot_update_flags(KVMMemoryListener *kml, KVMSlot *mem, |
367 | MemoryRegion *mr) | |
5832d1f2 | 368 | { |
4495d6a7 JK |
369 | int old_flags; |
370 | ||
4495d6a7 | 371 | old_flags = mem->flags; |
d6ff5cbc | 372 | mem->flags = kvm_mem_flags(mr); |
5832d1f2 | 373 | |
4495d6a7 | 374 | /* If nothing changed effectively, no need to issue ioctl */ |
d6ff5cbc | 375 | if (mem->flags == old_flags) { |
25254bbc | 376 | return 0; |
4495d6a7 JK |
377 | } |
378 | ||
7bbda04c | 379 | return kvm_set_user_memory_region(kml, mem); |
5832d1f2 AL |
380 | } |
381 | ||
7bbda04c PB |
382 | static int kvm_section_update_flags(KVMMemoryListener *kml, |
383 | MemoryRegionSection *section) | |
25254bbc | 384 | { |
343562e8 DH |
385 | hwaddr start_addr, size; |
386 | KVMSlot *mem; | |
25254bbc | 387 | |
343562e8 DH |
388 | size = kvm_align_section(section, &start_addr); |
389 | if (!size) { | |
ea8cb1a8 | 390 | return 0; |
25254bbc | 391 | } |
343562e8 DH |
392 | |
393 | mem = kvm_lookup_matching_slot(kml, start_addr, size); | |
394 | if (!mem) { | |
e377e87c DH |
395 | /* We don't have a slot if we want to trap every access. */ |
396 | return 0; | |
343562e8 DH |
397 | } |
398 | ||
399 | return kvm_slot_update_flags(kml, mem, section->mr); | |
25254bbc MT |
400 | } |
401 | ||
a01672d3 | 402 | static void kvm_log_start(MemoryListener *listener, |
b2dfd71c PB |
403 | MemoryRegionSection *section, |
404 | int old, int new) | |
5832d1f2 | 405 | { |
7bbda04c | 406 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
407 | int r; |
408 | ||
b2dfd71c PB |
409 | if (old != 0) { |
410 | return; | |
411 | } | |
412 | ||
7bbda04c | 413 | r = kvm_section_update_flags(kml, section); |
a01672d3 AK |
414 | if (r < 0) { |
415 | abort(); | |
416 | } | |
5832d1f2 AL |
417 | } |
418 | ||
a01672d3 | 419 | static void kvm_log_stop(MemoryListener *listener, |
b2dfd71c PB |
420 | MemoryRegionSection *section, |
421 | int old, int new) | |
5832d1f2 | 422 | { |
7bbda04c | 423 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
424 | int r; |
425 | ||
b2dfd71c PB |
426 | if (new != 0) { |
427 | return; | |
428 | } | |
429 | ||
7bbda04c | 430 | r = kvm_section_update_flags(kml, section); |
a01672d3 AK |
431 | if (r < 0) { |
432 | abort(); | |
433 | } | |
5832d1f2 AL |
434 | } |
435 | ||
8369e01c | 436 | /* get kvm's dirty pages bitmap and update qemu's */ |
ffcde12f AK |
437 | static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section, |
438 | unsigned long *bitmap) | |
96c1606b | 439 | { |
8e41fb63 FZ |
440 | ram_addr_t start = section->offset_within_region + |
441 | memory_region_get_ram_addr(section->mr); | |
5ff7fb77 JQ |
442 | ram_addr_t pages = int128_get64(section->size) / getpagesize(); |
443 | ||
444 | cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages); | |
8369e01c | 445 | return 0; |
96c1606b AG |
446 | } |
447 | ||
8369e01c MT |
448 | #define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) |
449 | ||
5832d1f2 AL |
450 | /** |
451 | * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space | |
fd4aa979 BS |
452 | * This function updates qemu's dirty bitmap using |
453 | * memory_region_set_dirty(). This means all bits are set | |
454 | * to dirty. | |
5832d1f2 | 455 | * |
d3f8d37f | 456 | * @start_add: start of logged region. |
5832d1f2 AL |
457 | * @end_addr: end of logged region. |
458 | */ | |
7bbda04c PB |
459 | static int kvm_physical_sync_dirty_bitmap(KVMMemoryListener *kml, |
460 | MemoryRegionSection *section) | |
5832d1f2 AL |
461 | { |
462 | KVMState *s = kvm_state; | |
714f78c5 | 463 | struct kvm_dirty_log d = {}; |
151f7749 | 464 | KVMSlot *mem; |
67548f09 DH |
465 | hwaddr start_addr, size; |
466 | ||
467 | size = kvm_align_section(section, &start_addr); | |
468 | if (size) { | |
469 | mem = kvm_lookup_matching_slot(kml, start_addr, size); | |
470 | if (!mem) { | |
e377e87c DH |
471 | /* We don't have a slot if we want to trap every access. */ |
472 | return 0; | |
151f7749 | 473 | } |
5832d1f2 | 474 | |
51b0c606 MT |
475 | /* XXX bad kernel interface alert |
476 | * For dirty bitmap, kernel allocates array of size aligned to | |
477 | * bits-per-long. But for case when the kernel is 64bits and | |
478 | * the userspace is 32bits, userspace can't align to the same | |
479 | * bits-per-long, since sizeof(long) is different between kernel | |
480 | * and user space. This way, userspace will provide buffer which | |
481 | * may be 4 bytes less than the kernel will use, resulting in | |
482 | * userspace memory corruption (which is not detectable by valgrind | |
483 | * too, in most cases). | |
484 | * So for now, let's align to 64 instead of HOST_LONG_BITS here, in | |
cb8d4c8f | 485 | * a hope that sizeof(long) won't become >8 any time soon. |
51b0c606 MT |
486 | */ |
487 | size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), | |
488 | /*HOST_LONG_BITS*/ 64) / 8; | |
67548f09 | 489 | d.dirty_bitmap = g_malloc0(size); |
5832d1f2 | 490 | |
38bfe691 | 491 | d.slot = mem->slot | (kml->as_id << 16); |
50212d63 | 492 | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { |
8c0d577e | 493 | DPRINTF("ioctl failed %d\n", errno); |
67548f09 DH |
494 | g_free(d.dirty_bitmap); |
495 | return -1; | |
151f7749 | 496 | } |
5832d1f2 | 497 | |
ffcde12f | 498 | kvm_get_dirty_pages_log_range(section, d.dirty_bitmap); |
67548f09 | 499 | g_free(d.dirty_bitmap); |
5832d1f2 | 500 | } |
151f7749 | 501 | |
67548f09 | 502 | return 0; |
5832d1f2 AL |
503 | } |
504 | ||
95d2994a AK |
505 | static void kvm_coalesce_mmio_region(MemoryListener *listener, |
506 | MemoryRegionSection *secion, | |
a8170e5e | 507 | hwaddr start, hwaddr size) |
f65ed4c1 | 508 | { |
f65ed4c1 AL |
509 | KVMState *s = kvm_state; |
510 | ||
511 | if (s->coalesced_mmio) { | |
512 | struct kvm_coalesced_mmio_zone zone; | |
513 | ||
514 | zone.addr = start; | |
515 | zone.size = size; | |
7e680753 | 516 | zone.pad = 0; |
f65ed4c1 | 517 | |
95d2994a | 518 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 519 | } |
f65ed4c1 AL |
520 | } |
521 | ||
95d2994a AK |
522 | static void kvm_uncoalesce_mmio_region(MemoryListener *listener, |
523 | MemoryRegionSection *secion, | |
a8170e5e | 524 | hwaddr start, hwaddr size) |
f65ed4c1 | 525 | { |
f65ed4c1 AL |
526 | KVMState *s = kvm_state; |
527 | ||
528 | if (s->coalesced_mmio) { | |
529 | struct kvm_coalesced_mmio_zone zone; | |
530 | ||
531 | zone.addr = start; | |
532 | zone.size = size; | |
7e680753 | 533 | zone.pad = 0; |
f65ed4c1 | 534 | |
95d2994a | 535 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 536 | } |
f65ed4c1 AL |
537 | } |
538 | ||
ad7b8b33 AL |
539 | int kvm_check_extension(KVMState *s, unsigned int extension) |
540 | { | |
541 | int ret; | |
542 | ||
543 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
544 | if (ret < 0) { | |
545 | ret = 0; | |
546 | } | |
547 | ||
548 | return ret; | |
549 | } | |
550 | ||
7d0a07fa AG |
551 | int kvm_vm_check_extension(KVMState *s, unsigned int extension) |
552 | { | |
553 | int ret; | |
554 | ||
555 | ret = kvm_vm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
556 | if (ret < 0) { | |
557 | /* VM wide version not implemented, use global one instead */ | |
558 | ret = kvm_check_extension(s, extension); | |
559 | } | |
560 | ||
561 | return ret; | |
562 | } | |
563 | ||
b680c5ba GK |
564 | static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size) |
565 | { | |
566 | #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN) | |
567 | /* The kernel expects ioeventfd values in HOST_WORDS_BIGENDIAN | |
568 | * endianness, but the memory core hands them in target endianness. | |
569 | * For example, PPC is always treated as big-endian even if running | |
570 | * on KVM and on PPC64LE. Correct here. | |
571 | */ | |
572 | switch (size) { | |
573 | case 2: | |
574 | val = bswap16(val); | |
575 | break; | |
576 | case 4: | |
577 | val = bswap32(val); | |
578 | break; | |
579 | } | |
580 | #endif | |
581 | return val; | |
582 | } | |
583 | ||
584f2be7 | 584 | static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val, |
41cb62c2 | 585 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
586 | { |
587 | int ret; | |
03a96b83 TH |
588 | struct kvm_ioeventfd iofd = { |
589 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, | |
590 | .addr = addr, | |
591 | .len = size, | |
592 | .flags = 0, | |
593 | .fd = fd, | |
594 | }; | |
500ffd4a MT |
595 | |
596 | if (!kvm_enabled()) { | |
597 | return -ENOSYS; | |
598 | } | |
599 | ||
41cb62c2 MT |
600 | if (datamatch) { |
601 | iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
602 | } | |
500ffd4a MT |
603 | if (!assign) { |
604 | iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
605 | } | |
606 | ||
607 | ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); | |
608 | ||
609 | if (ret < 0) { | |
610 | return -errno; | |
611 | } | |
612 | ||
613 | return 0; | |
614 | } | |
615 | ||
44c3f8f7 | 616 | static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val, |
41cb62c2 | 617 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
618 | { |
619 | struct kvm_ioeventfd kick = { | |
b680c5ba | 620 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, |
500ffd4a | 621 | .addr = addr, |
41cb62c2 | 622 | .flags = KVM_IOEVENTFD_FLAG_PIO, |
44c3f8f7 | 623 | .len = size, |
500ffd4a MT |
624 | .fd = fd, |
625 | }; | |
626 | int r; | |
627 | if (!kvm_enabled()) { | |
628 | return -ENOSYS; | |
629 | } | |
41cb62c2 MT |
630 | if (datamatch) { |
631 | kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
632 | } | |
500ffd4a MT |
633 | if (!assign) { |
634 | kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
635 | } | |
636 | r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); | |
637 | if (r < 0) { | |
638 | return r; | |
639 | } | |
640 | return 0; | |
641 | } | |
642 | ||
643 | ||
d2f2b8a7 SH |
644 | static int kvm_check_many_ioeventfds(void) |
645 | { | |
d0dcac83 SH |
646 | /* Userspace can use ioeventfd for io notification. This requires a host |
647 | * that supports eventfd(2) and an I/O thread; since eventfd does not | |
648 | * support SIGIO it cannot interrupt the vcpu. | |
649 | * | |
650 | * Older kernels have a 6 device limit on the KVM io bus. Find out so we | |
d2f2b8a7 SH |
651 | * can avoid creating too many ioeventfds. |
652 | */ | |
12d4536f | 653 | #if defined(CONFIG_EVENTFD) |
d2f2b8a7 SH |
654 | int ioeventfds[7]; |
655 | int i, ret = 0; | |
656 | for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { | |
657 | ioeventfds[i] = eventfd(0, EFD_CLOEXEC); | |
658 | if (ioeventfds[i] < 0) { | |
659 | break; | |
660 | } | |
41cb62c2 | 661 | ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true); |
d2f2b8a7 SH |
662 | if (ret < 0) { |
663 | close(ioeventfds[i]); | |
664 | break; | |
665 | } | |
666 | } | |
667 | ||
668 | /* Decide whether many devices are supported or not */ | |
669 | ret = i == ARRAY_SIZE(ioeventfds); | |
670 | ||
671 | while (i-- > 0) { | |
41cb62c2 | 672 | kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true); |
d2f2b8a7 SH |
673 | close(ioeventfds[i]); |
674 | } | |
675 | return ret; | |
676 | #else | |
677 | return 0; | |
678 | #endif | |
679 | } | |
680 | ||
94a8d39a JK |
681 | static const KVMCapabilityInfo * |
682 | kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list) | |
683 | { | |
684 | while (list->name) { | |
685 | if (!kvm_check_extension(s, list->value)) { | |
686 | return list; | |
687 | } | |
688 | list++; | |
689 | } | |
690 | return NULL; | |
691 | } | |
692 | ||
7bbda04c PB |
693 | static void kvm_set_phys_mem(KVMMemoryListener *kml, |
694 | MemoryRegionSection *section, bool add) | |
46dbef6a | 695 | { |
f357f564 | 696 | KVMSlot *mem; |
46dbef6a | 697 | int err; |
a01672d3 | 698 | MemoryRegion *mr = section->mr; |
235e8982 | 699 | bool writeable = !mr->readonly && !mr->rom_device; |
5ea69c2e DH |
700 | hwaddr start_addr, size; |
701 | void *ram; | |
46dbef6a | 702 | |
a01672d3 | 703 | if (!memory_region_is_ram(mr)) { |
235e8982 JJ |
704 | if (writeable || !kvm_readonly_mem_allowed) { |
705 | return; | |
706 | } else if (!mr->romd_mode) { | |
707 | /* If the memory device is not in romd_mode, then we actually want | |
708 | * to remove the kvm memory slot so all accesses will trap. */ | |
709 | add = false; | |
710 | } | |
9f213ed9 AK |
711 | } |
712 | ||
5ea69c2e DH |
713 | size = kvm_align_section(section, &start_addr); |
714 | if (!size) { | |
715 | return; | |
716 | } | |
717 | ||
bbfd3017 | 718 | /* use aligned delta to align the ram address */ |
5ea69c2e | 719 | ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + |
bbfd3017 | 720 | (start_addr - section->offset_within_address_space); |
a01672d3 | 721 | |
f357f564 | 722 | if (!add) { |
90ed4bcc | 723 | mem = kvm_lookup_matching_slot(kml, start_addr, size); |
46dbef6a | 724 | if (!mem) { |
46dbef6a MT |
725 | return; |
726 | } | |
1bfbac4e | 727 | if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { |
7bbda04c | 728 | kvm_physical_sync_dirty_bitmap(kml, section); |
3fbffb62 AK |
729 | } |
730 | ||
f357f564 | 731 | /* unregister the slot */ |
46dbef6a | 732 | mem->memory_size = 0; |
7bbda04c | 733 | err = kvm_set_user_memory_region(kml, mem); |
46dbef6a | 734 | if (err) { |
1c4fdaba | 735 | fprintf(stderr, "%s: error unregistering slot: %s\n", |
46dbef6a MT |
736 | __func__, strerror(-err)); |
737 | abort(); | |
738 | } | |
f357f564 | 739 | return; |
46dbef6a MT |
740 | } |
741 | ||
f357f564 | 742 | /* register the new slot */ |
7bbda04c | 743 | mem = kvm_alloc_slot(kml); |
46dbef6a MT |
744 | mem->memory_size = size; |
745 | mem->start_addr = start_addr; | |
9f213ed9 | 746 | mem->ram = ram; |
d6ff5cbc | 747 | mem->flags = kvm_mem_flags(mr); |
46dbef6a | 748 | |
7bbda04c | 749 | err = kvm_set_user_memory_region(kml, mem); |
46dbef6a MT |
750 | if (err) { |
751 | fprintf(stderr, "%s: error registering slot: %s\n", __func__, | |
752 | strerror(-err)); | |
753 | abort(); | |
754 | } | |
755 | } | |
756 | ||
a01672d3 AK |
757 | static void kvm_region_add(MemoryListener *listener, |
758 | MemoryRegionSection *section) | |
759 | { | |
7bbda04c PB |
760 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
761 | ||
dfde4e6e | 762 | memory_region_ref(section->mr); |
7bbda04c | 763 | kvm_set_phys_mem(kml, section, true); |
a01672d3 AK |
764 | } |
765 | ||
766 | static void kvm_region_del(MemoryListener *listener, | |
767 | MemoryRegionSection *section) | |
768 | { | |
7bbda04c PB |
769 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
770 | ||
771 | kvm_set_phys_mem(kml, section, false); | |
dfde4e6e | 772 | memory_region_unref(section->mr); |
a01672d3 AK |
773 | } |
774 | ||
775 | static void kvm_log_sync(MemoryListener *listener, | |
776 | MemoryRegionSection *section) | |
7b8f3b78 | 777 | { |
7bbda04c | 778 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
779 | int r; |
780 | ||
7bbda04c | 781 | r = kvm_physical_sync_dirty_bitmap(kml, section); |
a01672d3 AK |
782 | if (r < 0) { |
783 | abort(); | |
784 | } | |
7b8f3b78 MT |
785 | } |
786 | ||
d22b096e AK |
787 | static void kvm_mem_ioeventfd_add(MemoryListener *listener, |
788 | MemoryRegionSection *section, | |
789 | bool match_data, uint64_t data, | |
790 | EventNotifier *e) | |
791 | { | |
792 | int fd = event_notifier_get_fd(e); | |
80a1ea37 AK |
793 | int r; |
794 | ||
4b8f1c88 | 795 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
796 | data, true, int128_get64(section->size), |
797 | match_data); | |
80a1ea37 | 798 | if (r < 0) { |
fa4ba923 AK |
799 | fprintf(stderr, "%s: error adding ioeventfd: %s\n", |
800 | __func__, strerror(-r)); | |
80a1ea37 AK |
801 | abort(); |
802 | } | |
803 | } | |
804 | ||
d22b096e AK |
805 | static void kvm_mem_ioeventfd_del(MemoryListener *listener, |
806 | MemoryRegionSection *section, | |
807 | bool match_data, uint64_t data, | |
808 | EventNotifier *e) | |
80a1ea37 | 809 | { |
d22b096e | 810 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
811 | int r; |
812 | ||
4b8f1c88 | 813 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
814 | data, false, int128_get64(section->size), |
815 | match_data); | |
80a1ea37 AK |
816 | if (r < 0) { |
817 | abort(); | |
818 | } | |
819 | } | |
820 | ||
d22b096e AK |
821 | static void kvm_io_ioeventfd_add(MemoryListener *listener, |
822 | MemoryRegionSection *section, | |
823 | bool match_data, uint64_t data, | |
824 | EventNotifier *e) | |
80a1ea37 | 825 | { |
d22b096e | 826 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
827 | int r; |
828 | ||
44c3f8f7 | 829 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
830 | data, true, int128_get64(section->size), |
831 | match_data); | |
80a1ea37 | 832 | if (r < 0) { |
fa4ba923 AK |
833 | fprintf(stderr, "%s: error adding ioeventfd: %s\n", |
834 | __func__, strerror(-r)); | |
80a1ea37 AK |
835 | abort(); |
836 | } | |
837 | } | |
838 | ||
d22b096e AK |
839 | static void kvm_io_ioeventfd_del(MemoryListener *listener, |
840 | MemoryRegionSection *section, | |
841 | bool match_data, uint64_t data, | |
842 | EventNotifier *e) | |
80a1ea37 AK |
843 | |
844 | { | |
d22b096e | 845 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
846 | int r; |
847 | ||
44c3f8f7 | 848 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
849 | data, false, int128_get64(section->size), |
850 | match_data); | |
80a1ea37 AK |
851 | if (r < 0) { |
852 | abort(); | |
853 | } | |
854 | } | |
855 | ||
38bfe691 PB |
856 | void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml, |
857 | AddressSpace *as, int as_id) | |
7bbda04c PB |
858 | { |
859 | int i; | |
860 | ||
861 | kml->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot)); | |
38bfe691 | 862 | kml->as_id = as_id; |
7bbda04c PB |
863 | |
864 | for (i = 0; i < s->nr_slots; i++) { | |
865 | kml->slots[i].slot = i; | |
866 | } | |
867 | ||
868 | kml->listener.region_add = kvm_region_add; | |
869 | kml->listener.region_del = kvm_region_del; | |
870 | kml->listener.log_start = kvm_log_start; | |
871 | kml->listener.log_stop = kvm_log_stop; | |
872 | kml->listener.log_sync = kvm_log_sync; | |
873 | kml->listener.priority = 10; | |
874 | ||
875 | memory_listener_register(&kml->listener, as); | |
876 | } | |
d22b096e AK |
877 | |
878 | static MemoryListener kvm_io_listener = { | |
d22b096e AK |
879 | .eventfd_add = kvm_io_ioeventfd_add, |
880 | .eventfd_del = kvm_io_ioeventfd_del, | |
72e22d2f | 881 | .priority = 10, |
7b8f3b78 MT |
882 | }; |
883 | ||
3889c3fa | 884 | int kvm_set_irq(KVMState *s, int irq, int level) |
84b058d7 JK |
885 | { |
886 | struct kvm_irq_level event; | |
887 | int ret; | |
888 | ||
7ae26bd4 | 889 | assert(kvm_async_interrupts_enabled()); |
84b058d7 JK |
890 | |
891 | event.level = level; | |
892 | event.irq = irq; | |
e333cd69 | 893 | ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event); |
84b058d7 | 894 | if (ret < 0) { |
3889c3fa | 895 | perror("kvm_set_irq"); |
84b058d7 JK |
896 | abort(); |
897 | } | |
898 | ||
e333cd69 | 899 | return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status; |
84b058d7 JK |
900 | } |
901 | ||
902 | #ifdef KVM_CAP_IRQ_ROUTING | |
d3d3bef0 JK |
903 | typedef struct KVMMSIRoute { |
904 | struct kvm_irq_routing_entry kroute; | |
905 | QTAILQ_ENTRY(KVMMSIRoute) entry; | |
906 | } KVMMSIRoute; | |
907 | ||
84b058d7 JK |
908 | static void set_gsi(KVMState *s, unsigned int gsi) |
909 | { | |
8269fb70 | 910 | set_bit(gsi, s->used_gsi_bitmap); |
84b058d7 JK |
911 | } |
912 | ||
04fa27f5 JK |
913 | static void clear_gsi(KVMState *s, unsigned int gsi) |
914 | { | |
8269fb70 | 915 | clear_bit(gsi, s->used_gsi_bitmap); |
04fa27f5 JK |
916 | } |
917 | ||
7b774593 | 918 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 | 919 | { |
04fa27f5 | 920 | int gsi_count, i; |
84b058d7 | 921 | |
00008418 | 922 | gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1; |
84b058d7 | 923 | if (gsi_count > 0) { |
84b058d7 | 924 | /* Round up so we can search ints using ffs */ |
8269fb70 | 925 | s->used_gsi_bitmap = bitmap_new(gsi_count); |
4e2e4e63 | 926 | s->gsi_count = gsi_count; |
84b058d7 JK |
927 | } |
928 | ||
929 | s->irq_routes = g_malloc0(sizeof(*s->irq_routes)); | |
930 | s->nr_allocated_irq_routes = 0; | |
931 | ||
50bf31b9 | 932 | if (!kvm_direct_msi_allowed) { |
4a3adebb JK |
933 | for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) { |
934 | QTAILQ_INIT(&s->msi_hashtab[i]); | |
935 | } | |
04fa27f5 JK |
936 | } |
937 | ||
84b058d7 JK |
938 | kvm_arch_init_irq_routing(s); |
939 | } | |
940 | ||
cb925cf9 | 941 | void kvm_irqchip_commit_routes(KVMState *s) |
e7b20308 JK |
942 | { |
943 | int ret; | |
944 | ||
7005f7f8 PX |
945 | if (kvm_gsi_direct_mapping()) { |
946 | return; | |
947 | } | |
948 | ||
949 | if (!kvm_gsi_routing_enabled()) { | |
950 | return; | |
951 | } | |
952 | ||
e7b20308 | 953 | s->irq_routes->flags = 0; |
54a6c11b | 954 | trace_kvm_irqchip_commit_routes(); |
e7b20308 JK |
955 | ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); |
956 | assert(ret == 0); | |
957 | } | |
958 | ||
84b058d7 JK |
959 | static void kvm_add_routing_entry(KVMState *s, |
960 | struct kvm_irq_routing_entry *entry) | |
961 | { | |
962 | struct kvm_irq_routing_entry *new; | |
963 | int n, size; | |
964 | ||
965 | if (s->irq_routes->nr == s->nr_allocated_irq_routes) { | |
966 | n = s->nr_allocated_irq_routes * 2; | |
967 | if (n < 64) { | |
968 | n = 64; | |
969 | } | |
970 | size = sizeof(struct kvm_irq_routing); | |
971 | size += n * sizeof(*new); | |
972 | s->irq_routes = g_realloc(s->irq_routes, size); | |
973 | s->nr_allocated_irq_routes = n; | |
974 | } | |
975 | n = s->irq_routes->nr++; | |
976 | new = &s->irq_routes->entries[n]; | |
0fbc2074 MT |
977 | |
978 | *new = *entry; | |
84b058d7 JK |
979 | |
980 | set_gsi(s, entry->gsi); | |
981 | } | |
982 | ||
cc57407e JK |
983 | static int kvm_update_routing_entry(KVMState *s, |
984 | struct kvm_irq_routing_entry *new_entry) | |
985 | { | |
986 | struct kvm_irq_routing_entry *entry; | |
987 | int n; | |
988 | ||
989 | for (n = 0; n < s->irq_routes->nr; n++) { | |
990 | entry = &s->irq_routes->entries[n]; | |
991 | if (entry->gsi != new_entry->gsi) { | |
992 | continue; | |
993 | } | |
994 | ||
40509f7f MT |
995 | if(!memcmp(entry, new_entry, sizeof *entry)) { |
996 | return 0; | |
997 | } | |
998 | ||
0fbc2074 | 999 | *entry = *new_entry; |
cc57407e | 1000 | |
cc57407e JK |
1001 | return 0; |
1002 | } | |
1003 | ||
1004 | return -ESRCH; | |
1005 | } | |
1006 | ||
1df186df | 1007 | void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin) |
84b058d7 | 1008 | { |
0fbc2074 | 1009 | struct kvm_irq_routing_entry e = {}; |
84b058d7 | 1010 | |
4e2e4e63 JK |
1011 | assert(pin < s->gsi_count); |
1012 | ||
84b058d7 JK |
1013 | e.gsi = irq; |
1014 | e.type = KVM_IRQ_ROUTING_IRQCHIP; | |
1015 | e.flags = 0; | |
1016 | e.u.irqchip.irqchip = irqchip; | |
1017 | e.u.irqchip.pin = pin; | |
1018 | kvm_add_routing_entry(s, &e); | |
1019 | } | |
1020 | ||
1e2aa8be | 1021 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
04fa27f5 JK |
1022 | { |
1023 | struct kvm_irq_routing_entry *e; | |
1024 | int i; | |
1025 | ||
76fe21de AK |
1026 | if (kvm_gsi_direct_mapping()) { |
1027 | return; | |
1028 | } | |
1029 | ||
04fa27f5 JK |
1030 | for (i = 0; i < s->irq_routes->nr; i++) { |
1031 | e = &s->irq_routes->entries[i]; | |
1032 | if (e->gsi == virq) { | |
1033 | s->irq_routes->nr--; | |
1034 | *e = s->irq_routes->entries[s->irq_routes->nr]; | |
1035 | } | |
1036 | } | |
1037 | clear_gsi(s, virq); | |
38d87493 | 1038 | kvm_arch_release_virq_post(virq); |
9ba35d0b | 1039 | trace_kvm_irqchip_release_virq(virq); |
04fa27f5 JK |
1040 | } |
1041 | ||
1042 | static unsigned int kvm_hash_msi(uint32_t data) | |
1043 | { | |
1044 | /* This is optimized for IA32 MSI layout. However, no other arch shall | |
1045 | * repeat the mistake of not providing a direct MSI injection API. */ | |
1046 | return data & 0xff; | |
1047 | } | |
1048 | ||
1049 | static void kvm_flush_dynamic_msi_routes(KVMState *s) | |
1050 | { | |
1051 | KVMMSIRoute *route, *next; | |
1052 | unsigned int hash; | |
1053 | ||
1054 | for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) { | |
1055 | QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) { | |
1056 | kvm_irqchip_release_virq(s, route->kroute.gsi); | |
1057 | QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry); | |
1058 | g_free(route); | |
1059 | } | |
1060 | } | |
1061 | } | |
1062 | ||
1063 | static int kvm_irqchip_get_virq(KVMState *s) | |
1064 | { | |
8269fb70 | 1065 | int next_virq; |
04fa27f5 | 1066 | |
bdf02631 WM |
1067 | /* |
1068 | * PIC and IOAPIC share the first 16 GSI numbers, thus the available | |
1069 | * GSI numbers are more than the number of IRQ route. Allocating a GSI | |
1070 | * number can succeed even though a new route entry cannot be added. | |
1071 | * When this happens, flush dynamic MSI entries to free IRQ route entries. | |
1072 | */ | |
50bf31b9 | 1073 | if (!kvm_direct_msi_allowed && s->irq_routes->nr == s->gsi_count) { |
bdf02631 WM |
1074 | kvm_flush_dynamic_msi_routes(s); |
1075 | } | |
1076 | ||
04fa27f5 | 1077 | /* Return the lowest unused GSI in the bitmap */ |
8269fb70 WY |
1078 | next_virq = find_first_zero_bit(s->used_gsi_bitmap, s->gsi_count); |
1079 | if (next_virq >= s->gsi_count) { | |
1080 | return -ENOSPC; | |
1081 | } else { | |
1082 | return next_virq; | |
04fa27f5 | 1083 | } |
04fa27f5 JK |
1084 | } |
1085 | ||
1086 | static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg) | |
1087 | { | |
1088 | unsigned int hash = kvm_hash_msi(msg.data); | |
1089 | KVMMSIRoute *route; | |
1090 | ||
1091 | QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) { | |
1092 | if (route->kroute.u.msi.address_lo == (uint32_t)msg.address && | |
1093 | route->kroute.u.msi.address_hi == (msg.address >> 32) && | |
d07cc1f1 | 1094 | route->kroute.u.msi.data == le32_to_cpu(msg.data)) { |
04fa27f5 JK |
1095 | return route; |
1096 | } | |
1097 | } | |
1098 | return NULL; | |
1099 | } | |
1100 | ||
1101 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1102 | { | |
4a3adebb | 1103 | struct kvm_msi msi; |
04fa27f5 JK |
1104 | KVMMSIRoute *route; |
1105 | ||
50bf31b9 | 1106 | if (kvm_direct_msi_allowed) { |
4a3adebb JK |
1107 | msi.address_lo = (uint32_t)msg.address; |
1108 | msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1109 | msi.data = le32_to_cpu(msg.data); |
4a3adebb JK |
1110 | msi.flags = 0; |
1111 | memset(msi.pad, 0, sizeof(msi.pad)); | |
1112 | ||
1113 | return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi); | |
1114 | } | |
1115 | ||
04fa27f5 JK |
1116 | route = kvm_lookup_msi_route(s, msg); |
1117 | if (!route) { | |
e7b20308 | 1118 | int virq; |
04fa27f5 JK |
1119 | |
1120 | virq = kvm_irqchip_get_virq(s); | |
1121 | if (virq < 0) { | |
1122 | return virq; | |
1123 | } | |
1124 | ||
0fbc2074 | 1125 | route = g_malloc0(sizeof(KVMMSIRoute)); |
04fa27f5 JK |
1126 | route->kroute.gsi = virq; |
1127 | route->kroute.type = KVM_IRQ_ROUTING_MSI; | |
1128 | route->kroute.flags = 0; | |
1129 | route->kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1130 | route->kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1131 | route->kroute.u.msi.data = le32_to_cpu(msg.data); |
04fa27f5 JK |
1132 | |
1133 | kvm_add_routing_entry(s, &route->kroute); | |
cb925cf9 | 1134 | kvm_irqchip_commit_routes(s); |
04fa27f5 JK |
1135 | |
1136 | QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route, | |
1137 | entry); | |
04fa27f5 JK |
1138 | } |
1139 | ||
1140 | assert(route->kroute.type == KVM_IRQ_ROUTING_MSI); | |
1141 | ||
3889c3fa | 1142 | return kvm_set_irq(s, route->kroute.gsi, 1); |
04fa27f5 JK |
1143 | } |
1144 | ||
d1f6af6a | 1145 | int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) |
92b4e489 | 1146 | { |
0fbc2074 | 1147 | struct kvm_irq_routing_entry kroute = {}; |
92b4e489 | 1148 | int virq; |
d1f6af6a PX |
1149 | MSIMessage msg = {0, 0}; |
1150 | ||
88c725c7 | 1151 | if (pci_available && dev) { |
e1d4fb2d | 1152 | msg = pci_get_msi_message(dev, vector); |
d1f6af6a | 1153 | } |
92b4e489 | 1154 | |
76fe21de | 1155 | if (kvm_gsi_direct_mapping()) { |
1850b6b7 | 1156 | return kvm_arch_msi_data_to_gsi(msg.data); |
76fe21de AK |
1157 | } |
1158 | ||
f3e1bed8 | 1159 | if (!kvm_gsi_routing_enabled()) { |
92b4e489 JK |
1160 | return -ENOSYS; |
1161 | } | |
1162 | ||
1163 | virq = kvm_irqchip_get_virq(s); | |
1164 | if (virq < 0) { | |
1165 | return virq; | |
1166 | } | |
1167 | ||
1168 | kroute.gsi = virq; | |
1169 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1170 | kroute.flags = 0; | |
1171 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1172 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1173 | kroute.u.msi.data = le32_to_cpu(msg.data); |
88c725c7 | 1174 | if (pci_available && kvm_msi_devid_required()) { |
767a554a PF |
1175 | kroute.flags = KVM_MSI_VALID_DEVID; |
1176 | kroute.u.msi.devid = pci_requester_id(dev); | |
1177 | } | |
dc9f06ca | 1178 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { |
9e03a040 FB |
1179 | kvm_irqchip_release_virq(s, virq); |
1180 | return -EINVAL; | |
1181 | } | |
92b4e489 | 1182 | |
9ba35d0b PX |
1183 | trace_kvm_irqchip_add_msi_route(dev ? dev->name : (char *)"N/A", |
1184 | vector, virq); | |
54a6c11b | 1185 | |
92b4e489 | 1186 | kvm_add_routing_entry(s, &kroute); |
38d87493 | 1187 | kvm_arch_add_msi_route_post(&kroute, vector, dev); |
cb925cf9 | 1188 | kvm_irqchip_commit_routes(s); |
92b4e489 JK |
1189 | |
1190 | return virq; | |
1191 | } | |
1192 | ||
dc9f06ca PF |
1193 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg, |
1194 | PCIDevice *dev) | |
cc57407e | 1195 | { |
0fbc2074 | 1196 | struct kvm_irq_routing_entry kroute = {}; |
cc57407e | 1197 | |
76fe21de AK |
1198 | if (kvm_gsi_direct_mapping()) { |
1199 | return 0; | |
1200 | } | |
1201 | ||
cc57407e JK |
1202 | if (!kvm_irqchip_in_kernel()) { |
1203 | return -ENOSYS; | |
1204 | } | |
1205 | ||
1206 | kroute.gsi = virq; | |
1207 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1208 | kroute.flags = 0; | |
1209 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1210 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1211 | kroute.u.msi.data = le32_to_cpu(msg.data); |
88c725c7 | 1212 | if (pci_available && kvm_msi_devid_required()) { |
767a554a PF |
1213 | kroute.flags = KVM_MSI_VALID_DEVID; |
1214 | kroute.u.msi.devid = pci_requester_id(dev); | |
1215 | } | |
dc9f06ca | 1216 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { |
9e03a040 FB |
1217 | return -EINVAL; |
1218 | } | |
cc57407e | 1219 | |
54a6c11b PX |
1220 | trace_kvm_irqchip_update_msi_route(virq); |
1221 | ||
cc57407e JK |
1222 | return kvm_update_routing_entry(s, &kroute); |
1223 | } | |
1224 | ||
ca916d37 VM |
1225 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int rfd, int virq, |
1226 | bool assign) | |
39853bbc JK |
1227 | { |
1228 | struct kvm_irqfd irqfd = { | |
1229 | .fd = fd, | |
1230 | .gsi = virq, | |
1231 | .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN, | |
1232 | }; | |
1233 | ||
ca916d37 VM |
1234 | if (rfd != -1) { |
1235 | irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE; | |
1236 | irqfd.resamplefd = rfd; | |
1237 | } | |
1238 | ||
cc7e0ddf | 1239 | if (!kvm_irqfds_enabled()) { |
39853bbc JK |
1240 | return -ENOSYS; |
1241 | } | |
1242 | ||
1243 | return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd); | |
1244 | } | |
1245 | ||
d426d9fb CH |
1246 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
1247 | { | |
e9af2fef | 1248 | struct kvm_irq_routing_entry kroute = {}; |
d426d9fb CH |
1249 | int virq; |
1250 | ||
1251 | if (!kvm_gsi_routing_enabled()) { | |
1252 | return -ENOSYS; | |
1253 | } | |
1254 | ||
1255 | virq = kvm_irqchip_get_virq(s); | |
1256 | if (virq < 0) { | |
1257 | return virq; | |
1258 | } | |
1259 | ||
1260 | kroute.gsi = virq; | |
1261 | kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER; | |
1262 | kroute.flags = 0; | |
1263 | kroute.u.adapter.summary_addr = adapter->summary_addr; | |
1264 | kroute.u.adapter.ind_addr = adapter->ind_addr; | |
1265 | kroute.u.adapter.summary_offset = adapter->summary_offset; | |
1266 | kroute.u.adapter.ind_offset = adapter->ind_offset; | |
1267 | kroute.u.adapter.adapter_id = adapter->adapter_id; | |
1268 | ||
1269 | kvm_add_routing_entry(s, &kroute); | |
d426d9fb CH |
1270 | |
1271 | return virq; | |
1272 | } | |
1273 | ||
977a8d9c AS |
1274 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) |
1275 | { | |
1276 | struct kvm_irq_routing_entry kroute = {}; | |
1277 | int virq; | |
1278 | ||
1279 | if (!kvm_gsi_routing_enabled()) { | |
1280 | return -ENOSYS; | |
1281 | } | |
1282 | if (!kvm_check_extension(s, KVM_CAP_HYPERV_SYNIC)) { | |
1283 | return -ENOSYS; | |
1284 | } | |
1285 | virq = kvm_irqchip_get_virq(s); | |
1286 | if (virq < 0) { | |
1287 | return virq; | |
1288 | } | |
1289 | ||
1290 | kroute.gsi = virq; | |
1291 | kroute.type = KVM_IRQ_ROUTING_HV_SINT; | |
1292 | kroute.flags = 0; | |
1293 | kroute.u.hv_sint.vcpu = vcpu; | |
1294 | kroute.u.hv_sint.sint = sint; | |
1295 | ||
1296 | kvm_add_routing_entry(s, &kroute); | |
1297 | kvm_irqchip_commit_routes(s); | |
1298 | ||
1299 | return virq; | |
1300 | } | |
1301 | ||
84b058d7 JK |
1302 | #else /* !KVM_CAP_IRQ_ROUTING */ |
1303 | ||
7b774593 | 1304 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 JK |
1305 | { |
1306 | } | |
04fa27f5 | 1307 | |
d3d3bef0 JK |
1308 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
1309 | { | |
1310 | } | |
1311 | ||
04fa27f5 JK |
1312 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) |
1313 | { | |
1314 | abort(); | |
1315 | } | |
92b4e489 | 1316 | |
d1f6af6a | 1317 | int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) |
92b4e489 | 1318 | { |
df410675 | 1319 | return -ENOSYS; |
92b4e489 | 1320 | } |
39853bbc | 1321 | |
d426d9fb CH |
1322 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
1323 | { | |
1324 | return -ENOSYS; | |
1325 | } | |
1326 | ||
977a8d9c AS |
1327 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) |
1328 | { | |
1329 | return -ENOSYS; | |
1330 | } | |
1331 | ||
39853bbc JK |
1332 | static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign) |
1333 | { | |
1334 | abort(); | |
1335 | } | |
dabe3143 MT |
1336 | |
1337 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) | |
1338 | { | |
1339 | return -ENOSYS; | |
1340 | } | |
84b058d7 JK |
1341 | #endif /* !KVM_CAP_IRQ_ROUTING */ |
1342 | ||
1c9b71a7 EA |
1343 | int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, |
1344 | EventNotifier *rn, int virq) | |
39853bbc | 1345 | { |
ca916d37 VM |
1346 | return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), |
1347 | rn ? event_notifier_get_fd(rn) : -1, virq, true); | |
39853bbc JK |
1348 | } |
1349 | ||
1c9b71a7 EA |
1350 | int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, |
1351 | int virq) | |
15b2bd18 | 1352 | { |
ca916d37 VM |
1353 | return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), -1, virq, |
1354 | false); | |
15b2bd18 PB |
1355 | } |
1356 | ||
197e3524 EA |
1357 | int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, |
1358 | EventNotifier *rn, qemu_irq irq) | |
1359 | { | |
1360 | gpointer key, gsi; | |
1361 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
1362 | ||
1363 | if (!found) { | |
1364 | return -ENXIO; | |
1365 | } | |
1366 | return kvm_irqchip_add_irqfd_notifier_gsi(s, n, rn, GPOINTER_TO_INT(gsi)); | |
1367 | } | |
1368 | ||
1369 | int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, | |
1370 | qemu_irq irq) | |
1371 | { | |
1372 | gpointer key, gsi; | |
1373 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
1374 | ||
1375 | if (!found) { | |
1376 | return -ENXIO; | |
1377 | } | |
1378 | return kvm_irqchip_remove_irqfd_notifier_gsi(s, n, GPOINTER_TO_INT(gsi)); | |
1379 | } | |
1380 | ||
1381 | void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi) | |
1382 | { | |
1383 | g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi)); | |
1384 | } | |
1385 | ||
8db4936b | 1386 | static void kvm_irqchip_create(MachineState *machine, KVMState *s) |
84b058d7 | 1387 | { |
84b058d7 JK |
1388 | int ret; |
1389 | ||
8db4936b PB |
1390 | if (kvm_check_extension(s, KVM_CAP_IRQCHIP)) { |
1391 | ; | |
1392 | } else if (kvm_check_extension(s, KVM_CAP_S390_IRQCHIP)) { | |
1393 | ret = kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0); | |
1394 | if (ret < 0) { | |
1395 | fprintf(stderr, "Enable kernel irqchip failed: %s\n", strerror(-ret)); | |
1396 | exit(1); | |
1397 | } | |
1398 | } else { | |
1399 | return; | |
84b058d7 JK |
1400 | } |
1401 | ||
d6032e06 CD |
1402 | /* First probe and see if there's a arch-specific hook to create the |
1403 | * in-kernel irqchip for us */ | |
15eafc2e | 1404 | ret = kvm_arch_irqchip_create(machine, s); |
8db4936b | 1405 | if (ret == 0) { |
15eafc2e PB |
1406 | if (machine_kernel_irqchip_split(machine)) { |
1407 | perror("Split IRQ chip mode not supported."); | |
1408 | exit(1); | |
1409 | } else { | |
1410 | ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); | |
1411 | } | |
8db4936b PB |
1412 | } |
1413 | if (ret < 0) { | |
1414 | fprintf(stderr, "Create kernel irqchip failed: %s\n", strerror(-ret)); | |
1415 | exit(1); | |
84b058d7 JK |
1416 | } |
1417 | ||
3d4b2649 | 1418 | kvm_kernel_irqchip = true; |
7ae26bd4 PM |
1419 | /* If we have an in-kernel IRQ chip then we must have asynchronous |
1420 | * interrupt delivery (though the reverse is not necessarily true) | |
1421 | */ | |
1422 | kvm_async_interrupts_allowed = true; | |
215e79c0 | 1423 | kvm_halt_in_kernel_allowed = true; |
84b058d7 JK |
1424 | |
1425 | kvm_init_irq_routing(s); | |
1426 | ||
197e3524 | 1427 | s->gsimap = g_hash_table_new(g_direct_hash, g_direct_equal); |
84b058d7 JK |
1428 | } |
1429 | ||
670436ce AJ |
1430 | /* Find number of supported CPUs using the recommended |
1431 | * procedure from the kernel API documentation to cope with | |
1432 | * older kernels that may be missing capabilities. | |
1433 | */ | |
1434 | static int kvm_recommended_vcpus(KVMState *s) | |
3ed444e9 | 1435 | { |
11748ba7 | 1436 | int ret = kvm_vm_check_extension(s, KVM_CAP_NR_VCPUS); |
670436ce AJ |
1437 | return (ret) ? ret : 4; |
1438 | } | |
3ed444e9 | 1439 | |
670436ce AJ |
1440 | static int kvm_max_vcpus(KVMState *s) |
1441 | { | |
1442 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS); | |
1443 | return (ret) ? ret : kvm_recommended_vcpus(s); | |
3ed444e9 DH |
1444 | } |
1445 | ||
f31e3266 GK |
1446 | static int kvm_max_vcpu_id(KVMState *s) |
1447 | { | |
1448 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPU_ID); | |
1449 | return (ret) ? ret : kvm_max_vcpus(s); | |
1450 | } | |
1451 | ||
41264b38 GK |
1452 | bool kvm_vcpu_id_is_valid(int vcpu_id) |
1453 | { | |
1454 | KVMState *s = KVM_STATE(current_machine->accelerator); | |
f31e3266 | 1455 | return vcpu_id >= 0 && vcpu_id < kvm_max_vcpu_id(s); |
41264b38 GK |
1456 | } |
1457 | ||
f6a1ef64 | 1458 | static int kvm_init(MachineState *ms) |
05330448 | 1459 | { |
f6a1ef64 | 1460 | MachineClass *mc = MACHINE_GET_CLASS(ms); |
168ccc11 JK |
1461 | static const char upgrade_note[] = |
1462 | "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" | |
1463 | "(see http://sourceforge.net/projects/kvm).\n"; | |
670436ce AJ |
1464 | struct { |
1465 | const char *name; | |
1466 | int num; | |
1467 | } num_cpus[] = { | |
1468 | { "SMP", smp_cpus }, | |
1469 | { "hotpluggable", max_cpus }, | |
1470 | { NULL, } | |
1471 | }, *nc = num_cpus; | |
1472 | int soft_vcpus_limit, hard_vcpus_limit; | |
05330448 | 1473 | KVMState *s; |
94a8d39a | 1474 | const KVMCapabilityInfo *missing_cap; |
05330448 | 1475 | int ret; |
7bbda04c | 1476 | int type = 0; |
135a129a | 1477 | const char *kvm_type; |
05330448 | 1478 | |
fc02086b | 1479 | s = KVM_STATE(ms->accelerator); |
05330448 | 1480 | |
3145fcb6 DG |
1481 | /* |
1482 | * On systems where the kernel can support different base page | |
1483 | * sizes, host page size may be different from TARGET_PAGE_SIZE, | |
1484 | * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum | |
1485 | * page size for the system though. | |
1486 | */ | |
1487 | assert(TARGET_PAGE_SIZE <= getpagesize()); | |
1488 | ||
aed6efb9 JH |
1489 | s->sigmask_len = 8; |
1490 | ||
e22a25c9 | 1491 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
72cf2d4f | 1492 | QTAILQ_INIT(&s->kvm_sw_breakpoints); |
e22a25c9 | 1493 | #endif |
4c055ab5 | 1494 | QLIST_INIT(&s->kvm_parked_vcpus); |
05330448 | 1495 | s->vmfd = -1; |
40ff6d7e | 1496 | s->fd = qemu_open("/dev/kvm", O_RDWR); |
05330448 AL |
1497 | if (s->fd == -1) { |
1498 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); | |
1499 | ret = -errno; | |
1500 | goto err; | |
1501 | } | |
1502 | ||
1503 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); | |
1504 | if (ret < KVM_API_VERSION) { | |
0e1dac6c | 1505 | if (ret >= 0) { |
05330448 | 1506 | ret = -EINVAL; |
a426e122 | 1507 | } |
05330448 AL |
1508 | fprintf(stderr, "kvm version too old\n"); |
1509 | goto err; | |
1510 | } | |
1511 | ||
1512 | if (ret > KVM_API_VERSION) { | |
1513 | ret = -EINVAL; | |
1514 | fprintf(stderr, "kvm version not supported\n"); | |
1515 | goto err; | |
1516 | } | |
1517 | ||
cf0f7cf9 | 1518 | kvm_immediate_exit = kvm_check_extension(s, KVM_CAP_IMMEDIATE_EXIT); |
fb541ca5 AW |
1519 | s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS); |
1520 | ||
1521 | /* If unspecified, use the default value */ | |
1522 | if (!s->nr_slots) { | |
1523 | s->nr_slots = 32; | |
1524 | } | |
1525 | ||
135a129a | 1526 | kvm_type = qemu_opt_get(qemu_get_machine_opts(), "kvm-type"); |
f1e29879 MA |
1527 | if (mc->kvm_type) { |
1528 | type = mc->kvm_type(kvm_type); | |
135a129a | 1529 | } else if (kvm_type) { |
0e1dac6c | 1530 | ret = -EINVAL; |
135a129a AK |
1531 | fprintf(stderr, "Invalid argument kvm-type=%s\n", kvm_type); |
1532 | goto err; | |
1533 | } | |
1534 | ||
94ccff13 | 1535 | do { |
135a129a | 1536 | ret = kvm_ioctl(s, KVM_CREATE_VM, type); |
94ccff13 TK |
1537 | } while (ret == -EINTR); |
1538 | ||
1539 | if (ret < 0) { | |
521f438e | 1540 | fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret, |
94ccff13 TK |
1541 | strerror(-ret)); |
1542 | ||
0104dcac | 1543 | #ifdef TARGET_S390X |
2c80e996 CH |
1544 | if (ret == -EINVAL) { |
1545 | fprintf(stderr, | |
1546 | "Host kernel setup problem detected. Please verify:\n"); | |
1547 | fprintf(stderr, "- for kernels supporting the switch_amode or" | |
1548 | " user_mode parameters, whether\n"); | |
1549 | fprintf(stderr, | |
1550 | " user space is running in primary address space\n"); | |
1551 | fprintf(stderr, | |
1552 | "- for kernels supporting the vm.allocate_pgste sysctl, " | |
1553 | "whether it is enabled\n"); | |
1554 | } | |
0104dcac | 1555 | #endif |
05330448 | 1556 | goto err; |
0104dcac | 1557 | } |
05330448 | 1558 | |
94ccff13 | 1559 | s->vmfd = ret; |
11748ba7 GK |
1560 | |
1561 | /* check the vcpu limits */ | |
1562 | soft_vcpus_limit = kvm_recommended_vcpus(s); | |
1563 | hard_vcpus_limit = kvm_max_vcpus(s); | |
1564 | ||
1565 | while (nc->name) { | |
1566 | if (nc->num > soft_vcpus_limit) { | |
1567 | warn_report("Number of %s cpus requested (%d) exceeds " | |
1568 | "the recommended cpus supported by KVM (%d)", | |
1569 | nc->name, nc->num, soft_vcpus_limit); | |
1570 | ||
1571 | if (nc->num > hard_vcpus_limit) { | |
1572 | fprintf(stderr, "Number of %s cpus requested (%d) exceeds " | |
1573 | "the maximum cpus supported by KVM (%d)\n", | |
1574 | nc->name, nc->num, hard_vcpus_limit); | |
1575 | exit(1); | |
1576 | } | |
1577 | } | |
1578 | nc++; | |
1579 | } | |
1580 | ||
94a8d39a JK |
1581 | missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); |
1582 | if (!missing_cap) { | |
1583 | missing_cap = | |
1584 | kvm_check_extension_list(s, kvm_arch_required_capabilities); | |
05330448 | 1585 | } |
94a8d39a | 1586 | if (missing_cap) { |
ad7b8b33 | 1587 | ret = -EINVAL; |
94a8d39a JK |
1588 | fprintf(stderr, "kvm does not support %s\n%s", |
1589 | missing_cap->name, upgrade_note); | |
d85dc283 AL |
1590 | goto err; |
1591 | } | |
1592 | ||
ad7b8b33 | 1593 | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
f65ed4c1 | 1594 | |
a0fb002c JK |
1595 | #ifdef KVM_CAP_VCPU_EVENTS |
1596 | s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); | |
1597 | #endif | |
1598 | ||
b0b1d690 JK |
1599 | s->robust_singlestep = |
1600 | kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); | |
b0b1d690 | 1601 | |
ff44f1a3 JK |
1602 | #ifdef KVM_CAP_DEBUGREGS |
1603 | s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); | |
1604 | #endif | |
1605 | ||
d3d3bef0 | 1606 | #ifdef KVM_CAP_IRQ_ROUTING |
50bf31b9 | 1607 | kvm_direct_msi_allowed = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0); |
d3d3bef0 | 1608 | #endif |
4a3adebb | 1609 | |
3ab73842 JK |
1610 | s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3); |
1611 | ||
e333cd69 | 1612 | s->irq_set_ioctl = KVM_IRQ_LINE; |
8732fbd2 | 1613 | if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) { |
e333cd69 | 1614 | s->irq_set_ioctl = KVM_IRQ_LINE_STATUS; |
8732fbd2 PM |
1615 | } |
1616 | ||
df9c8b75 JJ |
1617 | #ifdef KVM_CAP_READONLY_MEM |
1618 | kvm_readonly_mem_allowed = | |
1619 | (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0); | |
1620 | #endif | |
1621 | ||
69e03ae6 NN |
1622 | kvm_eventfds_allowed = |
1623 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0); | |
1624 | ||
f41389ae EA |
1625 | kvm_irqfds_allowed = |
1626 | (kvm_check_extension(s, KVM_CAP_IRQFD) > 0); | |
1627 | ||
1628 | kvm_resamplefds_allowed = | |
1629 | (kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0); | |
1630 | ||
d0a073a1 DD |
1631 | kvm_vm_attributes_allowed = |
1632 | (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0); | |
1633 | ||
35108223 JW |
1634 | kvm_ioeventfd_any_length_allowed = |
1635 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD_ANY_LENGTH) > 0); | |
1636 | ||
d870cfde GA |
1637 | kvm_state = s; |
1638 | ||
b16565b3 | 1639 | ret = kvm_arch_init(ms, s); |
a426e122 | 1640 | if (ret < 0) { |
05330448 | 1641 | goto err; |
a426e122 | 1642 | } |
05330448 | 1643 | |
8db4936b PB |
1644 | if (machine_kernel_irqchip_allowed(ms)) { |
1645 | kvm_irqchip_create(ms, s); | |
84b058d7 JK |
1646 | } |
1647 | ||
8c56c1a5 PF |
1648 | if (kvm_eventfds_allowed) { |
1649 | s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add; | |
1650 | s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del; | |
1651 | } | |
7bbda04c PB |
1652 | s->memory_listener.listener.coalesced_mmio_add = kvm_coalesce_mmio_region; |
1653 | s->memory_listener.listener.coalesced_mmio_del = kvm_uncoalesce_mmio_region; | |
1654 | ||
1655 | kvm_memory_listener_register(s, &s->memory_listener, | |
38bfe691 | 1656 | &address_space_memory, 0); |
7bbda04c PB |
1657 | memory_listener_register(&kvm_io_listener, |
1658 | &address_space_io); | |
05330448 | 1659 | |
d2f2b8a7 SH |
1660 | s->many_ioeventfds = kvm_check_many_ioeventfds(); |
1661 | ||
62dd4eda GK |
1662 | s->sync_mmu = !!kvm_vm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); |
1663 | ||
05330448 AL |
1664 | return 0; |
1665 | ||
1666 | err: | |
0e1dac6c | 1667 | assert(ret < 0); |
6d1cc321 SW |
1668 | if (s->vmfd >= 0) { |
1669 | close(s->vmfd); | |
1670 | } | |
1671 | if (s->fd != -1) { | |
1672 | close(s->fd); | |
05330448 | 1673 | } |
7bbda04c | 1674 | g_free(s->memory_listener.slots); |
05330448 AL |
1675 | |
1676 | return ret; | |
1677 | } | |
1678 | ||
aed6efb9 JH |
1679 | void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len) |
1680 | { | |
1681 | s->sigmask_len = sigmask_len; | |
1682 | } | |
1683 | ||
4c663752 PB |
1684 | static void kvm_handle_io(uint16_t port, MemTxAttrs attrs, void *data, int direction, |
1685 | int size, uint32_t count) | |
05330448 AL |
1686 | { |
1687 | int i; | |
1688 | uint8_t *ptr = data; | |
1689 | ||
1690 | for (i = 0; i < count; i++) { | |
4c663752 | 1691 | address_space_rw(&address_space_io, port, attrs, |
5c9eb028 | 1692 | ptr, size, |
354678c5 | 1693 | direction == KVM_EXIT_IO_OUT); |
05330448 AL |
1694 | ptr += size; |
1695 | } | |
05330448 AL |
1696 | } |
1697 | ||
5326ab55 | 1698 | static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run) |
7c80eef8 | 1699 | { |
977c7b6d RK |
1700 | fprintf(stderr, "KVM internal error. Suberror: %d\n", |
1701 | run->internal.suberror); | |
1702 | ||
7c80eef8 MT |
1703 | if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) { |
1704 | int i; | |
1705 | ||
7c80eef8 MT |
1706 | for (i = 0; i < run->internal.ndata; ++i) { |
1707 | fprintf(stderr, "extra data[%d]: %"PRIx64"\n", | |
1708 | i, (uint64_t)run->internal.data[i]); | |
1709 | } | |
1710 | } | |
7c80eef8 MT |
1711 | if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) { |
1712 | fprintf(stderr, "emulation failure\n"); | |
20d695a9 | 1713 | if (!kvm_arch_stop_on_emulation_error(cpu)) { |
878096ee | 1714 | cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE); |
d73cd8f4 | 1715 | return EXCP_INTERRUPT; |
a426e122 | 1716 | } |
7c80eef8 MT |
1717 | } |
1718 | /* FIXME: Should trigger a qmp message to let management know | |
1719 | * something went wrong. | |
1720 | */ | |
73aaec4a | 1721 | return -1; |
7c80eef8 | 1722 | } |
7c80eef8 | 1723 | |
62a2744c | 1724 | void kvm_flush_coalesced_mmio_buffer(void) |
f65ed4c1 | 1725 | { |
f65ed4c1 | 1726 | KVMState *s = kvm_state; |
1cae88b9 AK |
1727 | |
1728 | if (s->coalesced_flush_in_progress) { | |
1729 | return; | |
1730 | } | |
1731 | ||
1732 | s->coalesced_flush_in_progress = true; | |
1733 | ||
62a2744c SY |
1734 | if (s->coalesced_mmio_ring) { |
1735 | struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring; | |
f65ed4c1 AL |
1736 | while (ring->first != ring->last) { |
1737 | struct kvm_coalesced_mmio *ent; | |
1738 | ||
1739 | ent = &ring->coalesced_mmio[ring->first]; | |
1740 | ||
1741 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); | |
85199474 | 1742 | smp_wmb(); |
f65ed4c1 AL |
1743 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; |
1744 | } | |
1745 | } | |
1cae88b9 AK |
1746 | |
1747 | s->coalesced_flush_in_progress = false; | |
f65ed4c1 AL |
1748 | } |
1749 | ||
14e6fe12 | 1750 | static void do_kvm_cpu_synchronize_state(CPUState *cpu, run_on_cpu_data arg) |
4c0960c0 | 1751 | { |
99f31832 | 1752 | if (!cpu->vcpu_dirty) { |
20d695a9 | 1753 | kvm_arch_get_registers(cpu); |
99f31832 | 1754 | cpu->vcpu_dirty = true; |
4c0960c0 AK |
1755 | } |
1756 | } | |
1757 | ||
dd1750d7 | 1758 | void kvm_cpu_synchronize_state(CPUState *cpu) |
2705d56a | 1759 | { |
99f31832 | 1760 | if (!cpu->vcpu_dirty) { |
14e6fe12 | 1761 | run_on_cpu(cpu, do_kvm_cpu_synchronize_state, RUN_ON_CPU_NULL); |
a426e122 | 1762 | } |
2705d56a JK |
1763 | } |
1764 | ||
14e6fe12 | 1765 | static void do_kvm_cpu_synchronize_post_reset(CPUState *cpu, run_on_cpu_data arg) |
ea375f9a | 1766 | { |
20d695a9 | 1767 | kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE); |
99f31832 | 1768 | cpu->vcpu_dirty = false; |
ea375f9a JK |
1769 | } |
1770 | ||
c8e2085d DH |
1771 | void kvm_cpu_synchronize_post_reset(CPUState *cpu) |
1772 | { | |
14e6fe12 | 1773 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_reset, RUN_ON_CPU_NULL); |
c8e2085d DH |
1774 | } |
1775 | ||
14e6fe12 | 1776 | static void do_kvm_cpu_synchronize_post_init(CPUState *cpu, run_on_cpu_data arg) |
ea375f9a | 1777 | { |
20d695a9 | 1778 | kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE); |
99f31832 | 1779 | cpu->vcpu_dirty = false; |
ea375f9a JK |
1780 | } |
1781 | ||
c8e2085d DH |
1782 | void kvm_cpu_synchronize_post_init(CPUState *cpu) |
1783 | { | |
14e6fe12 | 1784 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, RUN_ON_CPU_NULL); |
c8e2085d DH |
1785 | } |
1786 | ||
75e972da DG |
1787 | static void do_kvm_cpu_synchronize_pre_loadvm(CPUState *cpu, run_on_cpu_data arg) |
1788 | { | |
99f31832 | 1789 | cpu->vcpu_dirty = true; |
75e972da DG |
1790 | } |
1791 | ||
1792 | void kvm_cpu_synchronize_pre_loadvm(CPUState *cpu) | |
1793 | { | |
1794 | run_on_cpu(cpu, do_kvm_cpu_synchronize_pre_loadvm, RUN_ON_CPU_NULL); | |
1795 | } | |
1796 | ||
2ae41db2 PB |
1797 | #ifdef KVM_HAVE_MCE_INJECTION |
1798 | static __thread void *pending_sigbus_addr; | |
1799 | static __thread int pending_sigbus_code; | |
1800 | static __thread bool have_sigbus_pending; | |
1801 | #endif | |
1802 | ||
cf0f7cf9 PB |
1803 | static void kvm_cpu_kick(CPUState *cpu) |
1804 | { | |
1805 | atomic_set(&cpu->kvm_run->immediate_exit, 1); | |
1806 | } | |
1807 | ||
1808 | static void kvm_cpu_kick_self(void) | |
1809 | { | |
1810 | if (kvm_immediate_exit) { | |
1811 | kvm_cpu_kick(current_cpu); | |
1812 | } else { | |
1813 | qemu_cpu_kick_self(); | |
1814 | } | |
1815 | } | |
1816 | ||
18268b60 PB |
1817 | static void kvm_eat_signals(CPUState *cpu) |
1818 | { | |
1819 | struct timespec ts = { 0, 0 }; | |
1820 | siginfo_t siginfo; | |
1821 | sigset_t waitset; | |
1822 | sigset_t chkset; | |
1823 | int r; | |
1824 | ||
cf0f7cf9 PB |
1825 | if (kvm_immediate_exit) { |
1826 | atomic_set(&cpu->kvm_run->immediate_exit, 0); | |
1827 | /* Write kvm_run->immediate_exit before the cpu->exit_request | |
1828 | * write in kvm_cpu_exec. | |
1829 | */ | |
1830 | smp_wmb(); | |
1831 | return; | |
1832 | } | |
1833 | ||
18268b60 PB |
1834 | sigemptyset(&waitset); |
1835 | sigaddset(&waitset, SIG_IPI); | |
1836 | ||
1837 | do { | |
1838 | r = sigtimedwait(&waitset, &siginfo, &ts); | |
1839 | if (r == -1 && !(errno == EAGAIN || errno == EINTR)) { | |
1840 | perror("sigtimedwait"); | |
1841 | exit(1); | |
1842 | } | |
1843 | ||
1844 | r = sigpending(&chkset); | |
1845 | if (r == -1) { | |
1846 | perror("sigpending"); | |
1847 | exit(1); | |
1848 | } | |
1849 | } while (sigismember(&chkset, SIG_IPI)); | |
1850 | } | |
1851 | ||
1458c363 | 1852 | int kvm_cpu_exec(CPUState *cpu) |
05330448 | 1853 | { |
f7575c96 | 1854 | struct kvm_run *run = cpu->kvm_run; |
7cbb533f | 1855 | int ret, run_ret; |
05330448 | 1856 | |
8c0d577e | 1857 | DPRINTF("kvm_cpu_exec()\n"); |
05330448 | 1858 | |
20d695a9 | 1859 | if (kvm_arch_process_async_events(cpu)) { |
c5c6679d | 1860 | atomic_set(&cpu->exit_request, 0); |
6792a57b | 1861 | return EXCP_HLT; |
9ccfac9e | 1862 | } |
0af691d7 | 1863 | |
4b8523ee | 1864 | qemu_mutex_unlock_iothread(); |
1d78a3c3 | 1865 | cpu_exec_start(cpu); |
4b8523ee | 1866 | |
9ccfac9e | 1867 | do { |
4c663752 PB |
1868 | MemTxAttrs attrs; |
1869 | ||
99f31832 | 1870 | if (cpu->vcpu_dirty) { |
20d695a9 | 1871 | kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE); |
99f31832 | 1872 | cpu->vcpu_dirty = false; |
4c0960c0 AK |
1873 | } |
1874 | ||
20d695a9 | 1875 | kvm_arch_pre_run(cpu, run); |
c5c6679d | 1876 | if (atomic_read(&cpu->exit_request)) { |
9ccfac9e JK |
1877 | DPRINTF("interrupt exit requested\n"); |
1878 | /* | |
1879 | * KVM requires us to reenter the kernel after IO exits to complete | |
1880 | * instruction emulation. This self-signal will ensure that we | |
1881 | * leave ASAP again. | |
1882 | */ | |
cf0f7cf9 | 1883 | kvm_cpu_kick_self(); |
9ccfac9e | 1884 | } |
9ccfac9e | 1885 | |
cf0f7cf9 PB |
1886 | /* Read cpu->exit_request before KVM_RUN reads run->immediate_exit. |
1887 | * Matching barrier in kvm_eat_signals. | |
1888 | */ | |
1889 | smp_rmb(); | |
1890 | ||
1bc22652 | 1891 | run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0); |
9ccfac9e | 1892 | |
4c663752 | 1893 | attrs = kvm_arch_post_run(cpu, run); |
05330448 | 1894 | |
2ae41db2 PB |
1895 | #ifdef KVM_HAVE_MCE_INJECTION |
1896 | if (unlikely(have_sigbus_pending)) { | |
1897 | qemu_mutex_lock_iothread(); | |
1898 | kvm_arch_on_sigbus_vcpu(cpu, pending_sigbus_code, | |
1899 | pending_sigbus_addr); | |
1900 | have_sigbus_pending = false; | |
1901 | qemu_mutex_unlock_iothread(); | |
1902 | } | |
1903 | #endif | |
1904 | ||
7cbb533f | 1905 | if (run_ret < 0) { |
dc77d341 JK |
1906 | if (run_ret == -EINTR || run_ret == -EAGAIN) { |
1907 | DPRINTF("io window exit\n"); | |
18268b60 | 1908 | kvm_eat_signals(cpu); |
d73cd8f4 | 1909 | ret = EXCP_INTERRUPT; |
dc77d341 JK |
1910 | break; |
1911 | } | |
7b011fbc ME |
1912 | fprintf(stderr, "error: kvm run failed %s\n", |
1913 | strerror(-run_ret)); | |
dae02ba5 LV |
1914 | #ifdef TARGET_PPC |
1915 | if (run_ret == -EBUSY) { | |
1916 | fprintf(stderr, | |
1917 | "This is probably because your SMT is enabled.\n" | |
1918 | "VCPU can only run on primary threads with all " | |
1919 | "secondary threads offline.\n"); | |
1920 | } | |
1921 | #endif | |
a85e130e PB |
1922 | ret = -1; |
1923 | break; | |
05330448 AL |
1924 | } |
1925 | ||
b76ac80a | 1926 | trace_kvm_run_exit(cpu->cpu_index, run->exit_reason); |
05330448 AL |
1927 | switch (run->exit_reason) { |
1928 | case KVM_EXIT_IO: | |
8c0d577e | 1929 | DPRINTF("handle_io\n"); |
80b7d2ef | 1930 | /* Called outside BQL */ |
4c663752 | 1931 | kvm_handle_io(run->io.port, attrs, |
b30e93e9 JK |
1932 | (uint8_t *)run + run->io.data_offset, |
1933 | run->io.direction, | |
1934 | run->io.size, | |
1935 | run->io.count); | |
d73cd8f4 | 1936 | ret = 0; |
05330448 AL |
1937 | break; |
1938 | case KVM_EXIT_MMIO: | |
8c0d577e | 1939 | DPRINTF("handle_mmio\n"); |
de7ea885 | 1940 | /* Called outside BQL */ |
4c663752 PB |
1941 | address_space_rw(&address_space_memory, |
1942 | run->mmio.phys_addr, attrs, | |
1943 | run->mmio.data, | |
1944 | run->mmio.len, | |
1945 | run->mmio.is_write); | |
d73cd8f4 | 1946 | ret = 0; |
05330448 AL |
1947 | break; |
1948 | case KVM_EXIT_IRQ_WINDOW_OPEN: | |
8c0d577e | 1949 | DPRINTF("irq_window_open\n"); |
d73cd8f4 | 1950 | ret = EXCP_INTERRUPT; |
05330448 AL |
1951 | break; |
1952 | case KVM_EXIT_SHUTDOWN: | |
8c0d577e | 1953 | DPRINTF("shutdown\n"); |
cf83f140 | 1954 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
d73cd8f4 | 1955 | ret = EXCP_INTERRUPT; |
05330448 AL |
1956 | break; |
1957 | case KVM_EXIT_UNKNOWN: | |
bb44e0d1 JK |
1958 | fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", |
1959 | (uint64_t)run->hw.hardware_exit_reason); | |
73aaec4a | 1960 | ret = -1; |
05330448 | 1961 | break; |
7c80eef8 | 1962 | case KVM_EXIT_INTERNAL_ERROR: |
5326ab55 | 1963 | ret = kvm_handle_internal_error(cpu, run); |
7c80eef8 | 1964 | break; |
99040447 PS |
1965 | case KVM_EXIT_SYSTEM_EVENT: |
1966 | switch (run->system_event.type) { | |
1967 | case KVM_SYSTEM_EVENT_SHUTDOWN: | |
cf83f140 | 1968 | qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); |
99040447 PS |
1969 | ret = EXCP_INTERRUPT; |
1970 | break; | |
1971 | case KVM_SYSTEM_EVENT_RESET: | |
cf83f140 | 1972 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
99040447 PS |
1973 | ret = EXCP_INTERRUPT; |
1974 | break; | |
7c207b90 | 1975 | case KVM_SYSTEM_EVENT_CRASH: |
d187e08d | 1976 | kvm_cpu_synchronize_state(cpu); |
7c207b90 | 1977 | qemu_mutex_lock_iothread(); |
c86f106b | 1978 | qemu_system_guest_panicked(cpu_get_crash_info(cpu)); |
7c207b90 AS |
1979 | qemu_mutex_unlock_iothread(); |
1980 | ret = 0; | |
1981 | break; | |
99040447 PS |
1982 | default: |
1983 | DPRINTF("kvm_arch_handle_exit\n"); | |
1984 | ret = kvm_arch_handle_exit(cpu, run); | |
1985 | break; | |
1986 | } | |
1987 | break; | |
05330448 | 1988 | default: |
8c0d577e | 1989 | DPRINTF("kvm_arch_handle_exit\n"); |
20d695a9 | 1990 | ret = kvm_arch_handle_exit(cpu, run); |
05330448 AL |
1991 | break; |
1992 | } | |
d73cd8f4 | 1993 | } while (ret == 0); |
05330448 | 1994 | |
1d78a3c3 | 1995 | cpu_exec_end(cpu); |
4b8523ee JK |
1996 | qemu_mutex_lock_iothread(); |
1997 | ||
73aaec4a | 1998 | if (ret < 0) { |
878096ee | 1999 | cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE); |
0461d5a6 | 2000 | vm_stop(RUN_STATE_INTERNAL_ERROR); |
becfc390 AL |
2001 | } |
2002 | ||
c5c6679d | 2003 | atomic_set(&cpu->exit_request, 0); |
05330448 AL |
2004 | return ret; |
2005 | } | |
2006 | ||
984b5181 | 2007 | int kvm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
2008 | { |
2009 | int ret; | |
984b5181 AL |
2010 | void *arg; |
2011 | va_list ap; | |
05330448 | 2012 | |
984b5181 AL |
2013 | va_start(ap, type); |
2014 | arg = va_arg(ap, void *); | |
2015 | va_end(ap); | |
2016 | ||
9c775729 | 2017 | trace_kvm_ioctl(type, arg); |
984b5181 | 2018 | ret = ioctl(s->fd, type, arg); |
a426e122 | 2019 | if (ret == -1) { |
05330448 | 2020 | ret = -errno; |
a426e122 | 2021 | } |
05330448 AL |
2022 | return ret; |
2023 | } | |
2024 | ||
984b5181 | 2025 | int kvm_vm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
2026 | { |
2027 | int ret; | |
984b5181 AL |
2028 | void *arg; |
2029 | va_list ap; | |
2030 | ||
2031 | va_start(ap, type); | |
2032 | arg = va_arg(ap, void *); | |
2033 | va_end(ap); | |
05330448 | 2034 | |
9c775729 | 2035 | trace_kvm_vm_ioctl(type, arg); |
984b5181 | 2036 | ret = ioctl(s->vmfd, type, arg); |
a426e122 | 2037 | if (ret == -1) { |
05330448 | 2038 | ret = -errno; |
a426e122 | 2039 | } |
05330448 AL |
2040 | return ret; |
2041 | } | |
2042 | ||
1bc22652 | 2043 | int kvm_vcpu_ioctl(CPUState *cpu, int type, ...) |
05330448 AL |
2044 | { |
2045 | int ret; | |
984b5181 AL |
2046 | void *arg; |
2047 | va_list ap; | |
2048 | ||
2049 | va_start(ap, type); | |
2050 | arg = va_arg(ap, void *); | |
2051 | va_end(ap); | |
05330448 | 2052 | |
9c775729 | 2053 | trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg); |
8737c51c | 2054 | ret = ioctl(cpu->kvm_fd, type, arg); |
a426e122 | 2055 | if (ret == -1) { |
05330448 | 2056 | ret = -errno; |
a426e122 | 2057 | } |
05330448 AL |
2058 | return ret; |
2059 | } | |
bd322087 | 2060 | |
0a6a7cca CD |
2061 | int kvm_device_ioctl(int fd, int type, ...) |
2062 | { | |
2063 | int ret; | |
2064 | void *arg; | |
2065 | va_list ap; | |
2066 | ||
2067 | va_start(ap, type); | |
2068 | arg = va_arg(ap, void *); | |
2069 | va_end(ap); | |
2070 | ||
2071 | trace_kvm_device_ioctl(fd, type, arg); | |
2072 | ret = ioctl(fd, type, arg); | |
2073 | if (ret == -1) { | |
2074 | ret = -errno; | |
2075 | } | |
2076 | return ret; | |
2077 | } | |
2078 | ||
d0a073a1 DD |
2079 | int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr) |
2080 | { | |
2081 | int ret; | |
2082 | struct kvm_device_attr attribute = { | |
2083 | .group = group, | |
2084 | .attr = attr, | |
2085 | }; | |
2086 | ||
2087 | if (!kvm_vm_attributes_allowed) { | |
2088 | return 0; | |
2089 | } | |
2090 | ||
2091 | ret = kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attribute); | |
2092 | /* kvm returns 0 on success for HAS_DEVICE_ATTR */ | |
2093 | return ret ? 0 : 1; | |
2094 | } | |
2095 | ||
4b3cfe72 PF |
2096 | int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr) |
2097 | { | |
2098 | struct kvm_device_attr attribute = { | |
2099 | .group = group, | |
2100 | .attr = attr, | |
2101 | .flags = 0, | |
2102 | }; | |
2103 | ||
2104 | return kvm_device_ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute) ? 0 : 1; | |
2105 | } | |
2106 | ||
556969e9 EA |
2107 | int kvm_device_access(int fd, int group, uint64_t attr, |
2108 | void *val, bool write, Error **errp) | |
4b3cfe72 PF |
2109 | { |
2110 | struct kvm_device_attr kvmattr; | |
2111 | int err; | |
2112 | ||
2113 | kvmattr.flags = 0; | |
2114 | kvmattr.group = group; | |
2115 | kvmattr.attr = attr; | |
2116 | kvmattr.addr = (uintptr_t)val; | |
2117 | ||
2118 | err = kvm_device_ioctl(fd, | |
2119 | write ? KVM_SET_DEVICE_ATTR : KVM_GET_DEVICE_ATTR, | |
2120 | &kvmattr); | |
2121 | if (err < 0) { | |
556969e9 EA |
2122 | error_setg_errno(errp, -err, |
2123 | "KVM_%s_DEVICE_ATTR failed: Group %d " | |
2124 | "attr 0x%016" PRIx64, | |
2125 | write ? "SET" : "GET", group, attr); | |
4b3cfe72 | 2126 | } |
556969e9 | 2127 | return err; |
4b3cfe72 PF |
2128 | } |
2129 | ||
62dd4eda | 2130 | bool kvm_has_sync_mmu(void) |
bd322087 | 2131 | { |
62dd4eda | 2132 | return kvm_state->sync_mmu; |
bd322087 | 2133 | } |
e22a25c9 | 2134 | |
a0fb002c JK |
2135 | int kvm_has_vcpu_events(void) |
2136 | { | |
2137 | return kvm_state->vcpu_events; | |
2138 | } | |
2139 | ||
b0b1d690 JK |
2140 | int kvm_has_robust_singlestep(void) |
2141 | { | |
2142 | return kvm_state->robust_singlestep; | |
2143 | } | |
2144 | ||
ff44f1a3 JK |
2145 | int kvm_has_debugregs(void) |
2146 | { | |
2147 | return kvm_state->debugregs; | |
2148 | } | |
2149 | ||
d2f2b8a7 SH |
2150 | int kvm_has_many_ioeventfds(void) |
2151 | { | |
2152 | if (!kvm_enabled()) { | |
2153 | return 0; | |
2154 | } | |
2155 | return kvm_state->many_ioeventfds; | |
2156 | } | |
2157 | ||
84b058d7 JK |
2158 | int kvm_has_gsi_routing(void) |
2159 | { | |
a9c5eb0d | 2160 | #ifdef KVM_CAP_IRQ_ROUTING |
84b058d7 | 2161 | return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING); |
a9c5eb0d AG |
2162 | #else |
2163 | return false; | |
2164 | #endif | |
84b058d7 JK |
2165 | } |
2166 | ||
3ab73842 JK |
2167 | int kvm_has_intx_set_mask(void) |
2168 | { | |
2169 | return kvm_state->intx_set_mask; | |
2170 | } | |
2171 | ||
5d721b78 AG |
2172 | bool kvm_arm_supports_user_irq(void) |
2173 | { | |
2174 | return kvm_check_extension(kvm_state, KVM_CAP_ARM_USER_IRQ); | |
2175 | } | |
2176 | ||
e22a25c9 | 2177 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
a60f24b5 | 2178 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu, |
e22a25c9 AL |
2179 | target_ulong pc) |
2180 | { | |
2181 | struct kvm_sw_breakpoint *bp; | |
2182 | ||
a60f24b5 | 2183 | QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) { |
a426e122 | 2184 | if (bp->pc == pc) { |
e22a25c9 | 2185 | return bp; |
a426e122 | 2186 | } |
e22a25c9 AL |
2187 | } |
2188 | return NULL; | |
2189 | } | |
2190 | ||
a60f24b5 | 2191 | int kvm_sw_breakpoints_active(CPUState *cpu) |
e22a25c9 | 2192 | { |
a60f24b5 | 2193 | return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints); |
e22a25c9 AL |
2194 | } |
2195 | ||
452e4751 GC |
2196 | struct kvm_set_guest_debug_data { |
2197 | struct kvm_guest_debug dbg; | |
452e4751 GC |
2198 | int err; |
2199 | }; | |
2200 | ||
14e6fe12 | 2201 | static void kvm_invoke_set_guest_debug(CPUState *cpu, run_on_cpu_data data) |
452e4751 | 2202 | { |
14e6fe12 PB |
2203 | struct kvm_set_guest_debug_data *dbg_data = |
2204 | (struct kvm_set_guest_debug_data *) data.host_ptr; | |
b3807725 | 2205 | |
3c0ed2a3 | 2206 | dbg_data->err = kvm_vcpu_ioctl(cpu, KVM_SET_GUEST_DEBUG, |
a60f24b5 | 2207 | &dbg_data->dbg); |
452e4751 GC |
2208 | } |
2209 | ||
38e478ec | 2210 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 | 2211 | { |
452e4751 | 2212 | struct kvm_set_guest_debug_data data; |
e22a25c9 | 2213 | |
b0b1d690 | 2214 | data.dbg.control = reinject_trap; |
e22a25c9 | 2215 | |
ed2803da | 2216 | if (cpu->singlestep_enabled) { |
b0b1d690 JK |
2217 | data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
2218 | } | |
20d695a9 | 2219 | kvm_arch_update_guest_debug(cpu, &data.dbg); |
e22a25c9 | 2220 | |
14e6fe12 PB |
2221 | run_on_cpu(cpu, kvm_invoke_set_guest_debug, |
2222 | RUN_ON_CPU_HOST_PTR(&data)); | |
452e4751 | 2223 | return data.err; |
e22a25c9 AL |
2224 | } |
2225 | ||
62278814 | 2226 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2227 | target_ulong len, int type) |
2228 | { | |
2229 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
2230 | int err; |
2231 | ||
2232 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 2233 | bp = kvm_find_sw_breakpoint(cpu, addr); |
e22a25c9 AL |
2234 | if (bp) { |
2235 | bp->use_count++; | |
2236 | return 0; | |
2237 | } | |
2238 | ||
7267c094 | 2239 | bp = g_malloc(sizeof(struct kvm_sw_breakpoint)); |
e22a25c9 AL |
2240 | bp->pc = addr; |
2241 | bp->use_count = 1; | |
80b7cd73 | 2242 | err = kvm_arch_insert_sw_breakpoint(cpu, bp); |
e22a25c9 | 2243 | if (err) { |
7267c094 | 2244 | g_free(bp); |
e22a25c9 AL |
2245 | return err; |
2246 | } | |
2247 | ||
80b7cd73 | 2248 | QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
e22a25c9 AL |
2249 | } else { |
2250 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); | |
a426e122 | 2251 | if (err) { |
e22a25c9 | 2252 | return err; |
a426e122 | 2253 | } |
e22a25c9 AL |
2254 | } |
2255 | ||
bdc44640 | 2256 | CPU_FOREACH(cpu) { |
38e478ec | 2257 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 2258 | if (err) { |
e22a25c9 | 2259 | return err; |
a426e122 | 2260 | } |
e22a25c9 AL |
2261 | } |
2262 | return 0; | |
2263 | } | |
2264 | ||
62278814 | 2265 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2266 | target_ulong len, int type) |
2267 | { | |
2268 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
2269 | int err; |
2270 | ||
2271 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 2272 | bp = kvm_find_sw_breakpoint(cpu, addr); |
a426e122 | 2273 | if (!bp) { |
e22a25c9 | 2274 | return -ENOENT; |
a426e122 | 2275 | } |
e22a25c9 AL |
2276 | |
2277 | if (bp->use_count > 1) { | |
2278 | bp->use_count--; | |
2279 | return 0; | |
2280 | } | |
2281 | ||
80b7cd73 | 2282 | err = kvm_arch_remove_sw_breakpoint(cpu, bp); |
a426e122 | 2283 | if (err) { |
e22a25c9 | 2284 | return err; |
a426e122 | 2285 | } |
e22a25c9 | 2286 | |
80b7cd73 | 2287 | QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
7267c094 | 2288 | g_free(bp); |
e22a25c9 AL |
2289 | } else { |
2290 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); | |
a426e122 | 2291 | if (err) { |
e22a25c9 | 2292 | return err; |
a426e122 | 2293 | } |
e22a25c9 AL |
2294 | } |
2295 | ||
bdc44640 | 2296 | CPU_FOREACH(cpu) { |
38e478ec | 2297 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 2298 | if (err) { |
e22a25c9 | 2299 | return err; |
a426e122 | 2300 | } |
e22a25c9 AL |
2301 | } |
2302 | return 0; | |
2303 | } | |
2304 | ||
1d5791f4 | 2305 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
2306 | { |
2307 | struct kvm_sw_breakpoint *bp, *next; | |
80b7cd73 | 2308 | KVMState *s = cpu->kvm_state; |
dc54e252 | 2309 | CPUState *tmpcpu; |
e22a25c9 | 2310 | |
72cf2d4f | 2311 | QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
80b7cd73 | 2312 | if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) { |
e22a25c9 | 2313 | /* Try harder to find a CPU that currently sees the breakpoint. */ |
dc54e252 CG |
2314 | CPU_FOREACH(tmpcpu) { |
2315 | if (kvm_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) { | |
e22a25c9 | 2316 | break; |
a426e122 | 2317 | } |
e22a25c9 AL |
2318 | } |
2319 | } | |
78021d6d JK |
2320 | QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry); |
2321 | g_free(bp); | |
e22a25c9 AL |
2322 | } |
2323 | kvm_arch_remove_all_hw_breakpoints(); | |
2324 | ||
bdc44640 | 2325 | CPU_FOREACH(cpu) { |
38e478ec | 2326 | kvm_update_guest_debug(cpu, 0); |
a426e122 | 2327 | } |
e22a25c9 AL |
2328 | } |
2329 | ||
2330 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ | |
2331 | ||
38e478ec | 2332 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 AL |
2333 | { |
2334 | return -EINVAL; | |
2335 | } | |
2336 | ||
62278814 | 2337 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2338 | target_ulong len, int type) |
2339 | { | |
2340 | return -EINVAL; | |
2341 | } | |
2342 | ||
62278814 | 2343 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2344 | target_ulong len, int type) |
2345 | { | |
2346 | return -EINVAL; | |
2347 | } | |
2348 | ||
1d5791f4 | 2349 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
2350 | { |
2351 | } | |
2352 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ | |
cc84de95 | 2353 | |
18268b60 | 2354 | static int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset) |
cc84de95 | 2355 | { |
aed6efb9 | 2356 | KVMState *s = kvm_state; |
cc84de95 MT |
2357 | struct kvm_signal_mask *sigmask; |
2358 | int r; | |
2359 | ||
7267c094 | 2360 | sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset)); |
cc84de95 | 2361 | |
aed6efb9 | 2362 | sigmask->len = s->sigmask_len; |
cc84de95 | 2363 | memcpy(sigmask->sigset, sigset, sizeof(*sigset)); |
1bc22652 | 2364 | r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask); |
7267c094 | 2365 | g_free(sigmask); |
cc84de95 MT |
2366 | |
2367 | return r; | |
2368 | } | |
4d39892c | 2369 | |
cf0f7cf9 | 2370 | static void kvm_ipi_signal(int sig) |
18268b60 | 2371 | { |
cf0f7cf9 PB |
2372 | if (current_cpu) { |
2373 | assert(kvm_immediate_exit); | |
2374 | kvm_cpu_kick(current_cpu); | |
2375 | } | |
18268b60 PB |
2376 | } |
2377 | ||
2378 | void kvm_init_cpu_signals(CPUState *cpu) | |
2379 | { | |
2380 | int r; | |
2381 | sigset_t set; | |
2382 | struct sigaction sigact; | |
2383 | ||
2384 | memset(&sigact, 0, sizeof(sigact)); | |
cf0f7cf9 | 2385 | sigact.sa_handler = kvm_ipi_signal; |
18268b60 PB |
2386 | sigaction(SIG_IPI, &sigact, NULL); |
2387 | ||
2388 | pthread_sigmask(SIG_BLOCK, NULL, &set); | |
2389 | #if defined KVM_HAVE_MCE_INJECTION | |
2390 | sigdelset(&set, SIGBUS); | |
2391 | pthread_sigmask(SIG_SETMASK, &set, NULL); | |
2392 | #endif | |
2393 | sigdelset(&set, SIG_IPI); | |
cf0f7cf9 PB |
2394 | if (kvm_immediate_exit) { |
2395 | r = pthread_sigmask(SIG_SETMASK, &set, NULL); | |
2396 | } else { | |
2397 | r = kvm_set_signal_mask(cpu, &set); | |
2398 | } | |
18268b60 PB |
2399 | if (r) { |
2400 | fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r)); | |
2401 | exit(1); | |
2402 | } | |
2403 | } | |
2404 | ||
2ae41db2 | 2405 | /* Called asynchronously in VCPU thread. */ |
290adf38 | 2406 | int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) |
a1b87fe0 | 2407 | { |
2ae41db2 PB |
2408 | #ifdef KVM_HAVE_MCE_INJECTION |
2409 | if (have_sigbus_pending) { | |
2410 | return 1; | |
2411 | } | |
2412 | have_sigbus_pending = true; | |
2413 | pending_sigbus_addr = addr; | |
2414 | pending_sigbus_code = code; | |
2415 | atomic_set(&cpu->exit_request, 1); | |
2416 | return 0; | |
2417 | #else | |
2418 | return 1; | |
2419 | #endif | |
a1b87fe0 JK |
2420 | } |
2421 | ||
2ae41db2 | 2422 | /* Called synchronously (via signalfd) in main thread. */ |
a1b87fe0 JK |
2423 | int kvm_on_sigbus(int code, void *addr) |
2424 | { | |
2ae41db2 | 2425 | #ifdef KVM_HAVE_MCE_INJECTION |
4d39892c PB |
2426 | /* Action required MCE kills the process if SIGBUS is blocked. Because |
2427 | * that's what happens in the I/O thread, where we handle MCE via signalfd, | |
2428 | * we can only get action optional here. | |
2429 | */ | |
2430 | assert(code != BUS_MCEERR_AR); | |
2431 | kvm_arch_on_sigbus_vcpu(first_cpu, code, addr); | |
2432 | return 0; | |
2ae41db2 PB |
2433 | #else |
2434 | return 1; | |
2435 | #endif | |
a1b87fe0 | 2436 | } |
0a6a7cca CD |
2437 | |
2438 | int kvm_create_device(KVMState *s, uint64_t type, bool test) | |
2439 | { | |
2440 | int ret; | |
2441 | struct kvm_create_device create_dev; | |
2442 | ||
2443 | create_dev.type = type; | |
2444 | create_dev.fd = -1; | |
2445 | create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0; | |
2446 | ||
2447 | if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) { | |
2448 | return -ENOTSUP; | |
2449 | } | |
2450 | ||
2451 | ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev); | |
2452 | if (ret) { | |
2453 | return ret; | |
2454 | } | |
2455 | ||
2456 | return test ? 0 : create_dev.fd; | |
2457 | } | |
ada4135f | 2458 | |
29039acf PX |
2459 | bool kvm_device_supported(int vmfd, uint64_t type) |
2460 | { | |
2461 | struct kvm_create_device create_dev = { | |
2462 | .type = type, | |
2463 | .fd = -1, | |
2464 | .flags = KVM_CREATE_DEVICE_TEST, | |
2465 | }; | |
2466 | ||
2467 | if (ioctl(vmfd, KVM_CHECK_EXTENSION, KVM_CAP_DEVICE_CTRL) <= 0) { | |
2468 | return false; | |
2469 | } | |
2470 | ||
2471 | return (ioctl(vmfd, KVM_CREATE_DEVICE, &create_dev) >= 0); | |
2472 | } | |
2473 | ||
ada4135f CH |
2474 | int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source) |
2475 | { | |
2476 | struct kvm_one_reg reg; | |
2477 | int r; | |
2478 | ||
2479 | reg.id = id; | |
2480 | reg.addr = (uintptr_t) source; | |
2481 | r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); | |
2482 | if (r) { | |
844a3d34 | 2483 | trace_kvm_failed_reg_set(id, strerror(-r)); |
ada4135f CH |
2484 | } |
2485 | return r; | |
2486 | } | |
2487 | ||
2488 | int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target) | |
2489 | { | |
2490 | struct kvm_one_reg reg; | |
2491 | int r; | |
2492 | ||
2493 | reg.id = id; | |
2494 | reg.addr = (uintptr_t) target; | |
2495 | r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); | |
2496 | if (r) { | |
844a3d34 | 2497 | trace_kvm_failed_reg_get(id, strerror(-r)); |
ada4135f CH |
2498 | } |
2499 | return r; | |
2500 | } | |
782c3f29 EH |
2501 | |
2502 | static void kvm_accel_class_init(ObjectClass *oc, void *data) | |
2503 | { | |
2504 | AccelClass *ac = ACCEL_CLASS(oc); | |
2505 | ac->name = "KVM"; | |
0d15da8e | 2506 | ac->init_machine = kvm_init; |
782c3f29 EH |
2507 | ac->allowed = &kvm_allowed; |
2508 | } | |
2509 | ||
2510 | static const TypeInfo kvm_accel_type = { | |
2511 | .name = TYPE_KVM_ACCEL, | |
2512 | .parent = TYPE_ACCEL, | |
2513 | .class_init = kvm_accel_class_init, | |
fc02086b | 2514 | .instance_size = sizeof(KVMState), |
782c3f29 EH |
2515 | }; |
2516 | ||
2517 | static void kvm_type_init(void) | |
2518 | { | |
2519 | type_register_static(&kvm_accel_type); | |
2520 | } | |
2521 | ||
2522 | type_init(kvm_type_init); |