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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> |
b4420f19 | 18 | #include <poll.h> |
05330448 AL |
19 | |
20 | #include <linux/kvm.h> | |
21 | ||
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" |
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" |
54d31236 | 32 | #include "sysemu/runstate.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" |
1de7afc9 | 37 | #include "qemu/event_notifier.h" |
db725815 | 38 | #include "qemu/main-loop.h" |
92229a57 | 39 | #include "trace.h" |
197e3524 | 40 | #include "hw/irq.h" |
23b0898e | 41 | #include "qapi/visitor.h" |
11bc4a13 PB |
42 | #include "qapi/qapi-types-common.h" |
43 | #include "qapi/qapi-visit-common.h" | |
6b552b9b | 44 | #include "sysemu/reset.h" |
57038a92 CF |
45 | #include "qemu/guest-random.h" |
46 | #include "sysemu/hw_accel.h" | |
47 | #include "kvm-cpus.h" | |
05330448 | 48 | |
135a129a AK |
49 | #include "hw/boards.h" |
50 | ||
d2f2b8a7 SH |
51 | /* This check must be after config-host.h is included */ |
52 | #ifdef CONFIG_EVENTFD | |
53 | #include <sys/eventfd.h> | |
54 | #endif | |
55 | ||
bc92e4e9 AJ |
56 | /* KVM uses PAGE_SIZE in its definition of KVM_COALESCED_MMIO_MAX. We |
57 | * need to use the real host PAGE_SIZE, as that's what KVM will use. | |
58 | */ | |
eb8b1a79 JY |
59 | #ifdef PAGE_SIZE |
60 | #undef PAGE_SIZE | |
61 | #endif | |
038adc2f | 62 | #define PAGE_SIZE qemu_real_host_page_size |
f65ed4c1 | 63 | |
05330448 AL |
64 | //#define DEBUG_KVM |
65 | ||
66 | #ifdef DEBUG_KVM | |
8c0d577e | 67 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
68 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
69 | #else | |
8c0d577e | 70 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
71 | do { } while (0) |
72 | #endif | |
73 | ||
04fa27f5 JK |
74 | #define KVM_MSI_HASHTAB_SIZE 256 |
75 | ||
4c055ab5 GZ |
76 | struct KVMParkedVcpu { |
77 | unsigned long vcpu_id; | |
78 | int kvm_fd; | |
79 | QLIST_ENTRY(KVMParkedVcpu) node; | |
80 | }; | |
81 | ||
b4420f19 PX |
82 | enum KVMDirtyRingReaperState { |
83 | KVM_DIRTY_RING_REAPER_NONE = 0, | |
84 | /* The reaper is sleeping */ | |
85 | KVM_DIRTY_RING_REAPER_WAIT, | |
86 | /* The reaper is reaping for dirty pages */ | |
87 | KVM_DIRTY_RING_REAPER_REAPING, | |
88 | }; | |
89 | ||
90 | /* | |
91 | * KVM reaper instance, responsible for collecting the KVM dirty bits | |
92 | * via the dirty ring. | |
93 | */ | |
94 | struct KVMDirtyRingReaper { | |
95 | /* The reaper thread */ | |
96 | QemuThread reaper_thr; | |
97 | volatile uint64_t reaper_iteration; /* iteration number of reaper thr */ | |
98 | volatile enum KVMDirtyRingReaperState reaper_state; /* reap thr state */ | |
99 | }; | |
100 | ||
9d1c35df | 101 | struct KVMState |
05330448 | 102 | { |
fc02086b EH |
103 | AccelState parent_obj; |
104 | ||
fb541ca5 | 105 | int nr_slots; |
05330448 AL |
106 | int fd; |
107 | int vmfd; | |
f65ed4c1 | 108 | int coalesced_mmio; |
e6d34aee | 109 | int coalesced_pio; |
62a2744c | 110 | struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; |
1cae88b9 | 111 | bool coalesced_flush_in_progress; |
a0fb002c | 112 | int vcpu_events; |
b0b1d690 | 113 | int robust_singlestep; |
ff44f1a3 | 114 | int debugregs; |
e22a25c9 | 115 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
b58deb34 | 116 | QTAILQ_HEAD(, kvm_sw_breakpoint) kvm_sw_breakpoints; |
e22a25c9 | 117 | #endif |
ebbfef2f | 118 | int max_nested_state_len; |
d2f2b8a7 | 119 | int many_ioeventfds; |
3ab73842 | 120 | int intx_set_mask; |
23b0898e | 121 | int kvm_shadow_mem; |
11bc4a13 PB |
122 | bool kernel_irqchip_allowed; |
123 | bool kernel_irqchip_required; | |
d1972be1 | 124 | OnOffAuto kernel_irqchip_split; |
62dd4eda | 125 | bool sync_mmu; |
494cd11d | 126 | uint64_t manual_dirty_log_protect; |
92e4b519 DG |
127 | /* The man page (and posix) say ioctl numbers are signed int, but |
128 | * they're not. Linux, glibc and *BSD all treat ioctl numbers as | |
129 | * unsigned, and treating them as signed here can break things */ | |
e333cd69 | 130 | unsigned irq_set_ioctl; |
aed6efb9 | 131 | unsigned int sigmask_len; |
197e3524 | 132 | GHashTable *gsimap; |
84b058d7 JK |
133 | #ifdef KVM_CAP_IRQ_ROUTING |
134 | struct kvm_irq_routing *irq_routes; | |
135 | int nr_allocated_irq_routes; | |
8269fb70 | 136 | unsigned long *used_gsi_bitmap; |
4e2e4e63 | 137 | unsigned int gsi_count; |
b58deb34 | 138 | QTAILQ_HEAD(, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE]; |
84b058d7 | 139 | #endif |
7bbda04c | 140 | KVMMemoryListener memory_listener; |
4c055ab5 | 141 | QLIST_HEAD(, KVMParkedVcpu) kvm_parked_vcpus; |
b20e3780 | 142 | |
8072aae3 AK |
143 | /* For "info mtree -f" to tell if an MR is registered in KVM */ |
144 | int nr_as; | |
145 | struct KVMAs { | |
146 | KVMMemoryListener *ml; | |
147 | AddressSpace *as; | |
148 | } *as; | |
2ea5cb0a PX |
149 | uint64_t kvm_dirty_ring_bytes; /* Size of the per-vcpu dirty ring */ |
150 | uint32_t kvm_dirty_ring_size; /* Number of dirty GFNs per ring */ | |
b4420f19 | 151 | struct KVMDirtyRingReaper reaper; |
9d1c35df | 152 | }; |
05330448 | 153 | |
6a7af8cb | 154 | KVMState *kvm_state; |
3d4b2649 | 155 | bool kvm_kernel_irqchip; |
15eafc2e | 156 | bool kvm_split_irqchip; |
7ae26bd4 | 157 | bool kvm_async_interrupts_allowed; |
215e79c0 | 158 | bool kvm_halt_in_kernel_allowed; |
69e03ae6 | 159 | bool kvm_eventfds_allowed; |
cc7e0ddf | 160 | bool kvm_irqfds_allowed; |
f41389ae | 161 | bool kvm_resamplefds_allowed; |
614e41bc | 162 | bool kvm_msi_via_irqfd_allowed; |
f3e1bed8 | 163 | bool kvm_gsi_routing_allowed; |
76fe21de | 164 | bool kvm_gsi_direct_mapping; |
13eed94e | 165 | bool kvm_allowed; |
df9c8b75 | 166 | bool kvm_readonly_mem_allowed; |
d0a073a1 | 167 | bool kvm_vm_attributes_allowed; |
50bf31b9 | 168 | bool kvm_direct_msi_allowed; |
35108223 | 169 | bool kvm_ioeventfd_any_length_allowed; |
767a554a | 170 | bool kvm_msi_use_devid; |
cf0f7cf9 | 171 | static bool kvm_immediate_exit; |
023ae9a8 | 172 | static hwaddr kvm_max_slot_size = ~0; |
05330448 | 173 | |
94a8d39a JK |
174 | static const KVMCapabilityInfo kvm_required_capabilites[] = { |
175 | KVM_CAP_INFO(USER_MEMORY), | |
176 | KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS), | |
89de4b91 | 177 | KVM_CAP_INFO(JOIN_MEMORY_REGIONS_WORKS), |
94a8d39a JK |
178 | KVM_CAP_LAST_INFO |
179 | }; | |
180 | ||
3607715a DG |
181 | static NotifierList kvm_irqchip_change_notifiers = |
182 | NOTIFIER_LIST_INITIALIZER(kvm_irqchip_change_notifiers); | |
183 | ||
c82d9d43 PX |
184 | struct KVMResampleFd { |
185 | int gsi; | |
186 | EventNotifier *resample_event; | |
187 | QLIST_ENTRY(KVMResampleFd) node; | |
188 | }; | |
189 | typedef struct KVMResampleFd KVMResampleFd; | |
190 | ||
191 | /* | |
192 | * Only used with split irqchip where we need to do the resample fd | |
193 | * kick for the kernel from userspace. | |
194 | */ | |
195 | static QLIST_HEAD(, KVMResampleFd) kvm_resample_fd_list = | |
196 | QLIST_HEAD_INITIALIZER(kvm_resample_fd_list); | |
197 | ||
a2f77862 PX |
198 | static QemuMutex kml_slots_lock; |
199 | ||
200 | #define kvm_slots_lock() qemu_mutex_lock(&kml_slots_lock) | |
201 | #define kvm_slots_unlock() qemu_mutex_unlock(&kml_slots_lock) | |
36adac49 | 202 | |
ea776d15 PX |
203 | static void kvm_slot_init_dirty_bitmap(KVMSlot *mem); |
204 | ||
c82d9d43 PX |
205 | static inline void kvm_resample_fd_remove(int gsi) |
206 | { | |
207 | KVMResampleFd *rfd; | |
208 | ||
209 | QLIST_FOREACH(rfd, &kvm_resample_fd_list, node) { | |
210 | if (rfd->gsi == gsi) { | |
211 | QLIST_REMOVE(rfd, node); | |
212 | g_free(rfd); | |
213 | break; | |
214 | } | |
215 | } | |
216 | } | |
217 | ||
218 | static inline void kvm_resample_fd_insert(int gsi, EventNotifier *event) | |
219 | { | |
220 | KVMResampleFd *rfd = g_new0(KVMResampleFd, 1); | |
221 | ||
222 | rfd->gsi = gsi; | |
223 | rfd->resample_event = event; | |
224 | ||
225 | QLIST_INSERT_HEAD(&kvm_resample_fd_list, rfd, node); | |
226 | } | |
227 | ||
228 | void kvm_resample_fd_notify(int gsi) | |
229 | { | |
230 | KVMResampleFd *rfd; | |
231 | ||
232 | QLIST_FOREACH(rfd, &kvm_resample_fd_list, node) { | |
233 | if (rfd->gsi == gsi) { | |
234 | event_notifier_set(rfd->resample_event); | |
235 | trace_kvm_resample_fd_notify(gsi); | |
236 | return; | |
237 | } | |
238 | } | |
239 | } | |
240 | ||
44f2e6c1 BR |
241 | int kvm_get_max_memslots(void) |
242 | { | |
4f7f5893 | 243 | KVMState *s = KVM_STATE(current_accel()); |
44f2e6c1 BR |
244 | |
245 | return s->nr_slots; | |
246 | } | |
247 | ||
36adac49 | 248 | /* Called with KVMMemoryListener.slots_lock held */ |
7bbda04c | 249 | static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml) |
05330448 | 250 | { |
7bbda04c | 251 | KVMState *s = kvm_state; |
05330448 AL |
252 | int i; |
253 | ||
fb541ca5 | 254 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c PB |
255 | if (kml->slots[i].memory_size == 0) { |
256 | return &kml->slots[i]; | |
a426e122 | 257 | } |
05330448 AL |
258 | } |
259 | ||
b8865591 IM |
260 | return NULL; |
261 | } | |
262 | ||
263 | bool kvm_has_free_slot(MachineState *ms) | |
264 | { | |
7bbda04c | 265 | KVMState *s = KVM_STATE(ms->accelerator); |
36adac49 PX |
266 | bool result; |
267 | KVMMemoryListener *kml = &s->memory_listener; | |
268 | ||
a2f77862 | 269 | kvm_slots_lock(); |
36adac49 | 270 | result = !!kvm_get_free_slot(kml); |
a2f77862 | 271 | kvm_slots_unlock(); |
7bbda04c | 272 | |
36adac49 | 273 | return result; |
b8865591 IM |
274 | } |
275 | ||
36adac49 | 276 | /* Called with KVMMemoryListener.slots_lock held */ |
7bbda04c | 277 | static KVMSlot *kvm_alloc_slot(KVMMemoryListener *kml) |
b8865591 | 278 | { |
7bbda04c | 279 | KVMSlot *slot = kvm_get_free_slot(kml); |
b8865591 IM |
280 | |
281 | if (slot) { | |
282 | return slot; | |
283 | } | |
284 | ||
d3f8d37f AL |
285 | fprintf(stderr, "%s: no free slot available\n", __func__); |
286 | abort(); | |
287 | } | |
288 | ||
7bbda04c | 289 | static KVMSlot *kvm_lookup_matching_slot(KVMMemoryListener *kml, |
a8170e5e | 290 | hwaddr start_addr, |
2747e716 | 291 | hwaddr size) |
d3f8d37f | 292 | { |
7bbda04c | 293 | KVMState *s = kvm_state; |
d3f8d37f AL |
294 | int i; |
295 | ||
fb541ca5 | 296 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c | 297 | KVMSlot *mem = &kml->slots[i]; |
d3f8d37f | 298 | |
2747e716 | 299 | if (start_addr == mem->start_addr && size == mem->memory_size) { |
d3f8d37f AL |
300 | return mem; |
301 | } | |
302 | } | |
303 | ||
05330448 AL |
304 | return NULL; |
305 | } | |
306 | ||
5ea69c2e DH |
307 | /* |
308 | * Calculate and align the start address and the size of the section. | |
309 | * Return the size. If the size is 0, the aligned section is empty. | |
310 | */ | |
311 | static hwaddr kvm_align_section(MemoryRegionSection *section, | |
312 | hwaddr *start) | |
313 | { | |
314 | hwaddr size = int128_get64(section->size); | |
a6ffc423 | 315 | hwaddr delta, aligned; |
5ea69c2e DH |
316 | |
317 | /* kvm works in page size chunks, but the function may be called | |
318 | with sub-page size and unaligned start address. Pad the start | |
319 | address to next and truncate size to previous page boundary. */ | |
a6ffc423 DH |
320 | aligned = ROUND_UP(section->offset_within_address_space, |
321 | qemu_real_host_page_size); | |
322 | delta = aligned - section->offset_within_address_space; | |
323 | *start = aligned; | |
5ea69c2e DH |
324 | if (delta > size) { |
325 | return 0; | |
326 | } | |
5ea69c2e | 327 | |
a6ffc423 | 328 | return (size - delta) & qemu_real_host_page_mask; |
5ea69c2e DH |
329 | } |
330 | ||
9f213ed9 | 331 | int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, |
a8170e5e | 332 | hwaddr *phys_addr) |
983dfc3b | 333 | { |
7bbda04c | 334 | KVMMemoryListener *kml = &s->memory_listener; |
36adac49 | 335 | int i, ret = 0; |
983dfc3b | 336 | |
a2f77862 | 337 | kvm_slots_lock(); |
fb541ca5 | 338 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c | 339 | KVMSlot *mem = &kml->slots[i]; |
983dfc3b | 340 | |
9f213ed9 AK |
341 | if (ram >= mem->ram && ram < mem->ram + mem->memory_size) { |
342 | *phys_addr = mem->start_addr + (ram - mem->ram); | |
36adac49 PX |
343 | ret = 1; |
344 | break; | |
983dfc3b HY |
345 | } |
346 | } | |
a2f77862 | 347 | kvm_slots_unlock(); |
983dfc3b | 348 | |
36adac49 | 349 | return ret; |
983dfc3b HY |
350 | } |
351 | ||
6c090d4a | 352 | static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot, bool new) |
5832d1f2 | 353 | { |
7bbda04c | 354 | KVMState *s = kvm_state; |
5832d1f2 | 355 | struct kvm_userspace_memory_region mem; |
fe29141b | 356 | int ret; |
5832d1f2 | 357 | |
38bfe691 | 358 | mem.slot = slot->slot | (kml->as_id << 16); |
5832d1f2 | 359 | mem.guest_phys_addr = slot->start_addr; |
9f213ed9 | 360 | mem.userspace_addr = (unsigned long)slot->ram; |
5832d1f2 | 361 | mem.flags = slot->flags; |
651eb0f4 | 362 | |
6c090d4a | 363 | if (slot->memory_size && !new && (mem.flags ^ slot->old_flags) & KVM_MEM_READONLY) { |
235e8982 JJ |
364 | /* Set the slot size to 0 before setting the slot to the desired |
365 | * value. This is needed based on KVM commit 75d61fbc. */ | |
366 | mem.memory_size = 0; | |
88cd34ee PMD |
367 | ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); |
368 | if (ret < 0) { | |
369 | goto err; | |
370 | } | |
235e8982 JJ |
371 | } |
372 | mem.memory_size = slot->memory_size; | |
fe29141b | 373 | ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); |
6c090d4a | 374 | slot->old_flags = mem.flags; |
88cd34ee | 375 | err: |
fe29141b AK |
376 | trace_kvm_set_user_memory(mem.slot, mem.flags, mem.guest_phys_addr, |
377 | mem.memory_size, mem.userspace_addr, ret); | |
88cd34ee PMD |
378 | if (ret < 0) { |
379 | error_report("%s: KVM_SET_USER_MEMORY_REGION failed, slot=%d," | |
380 | " start=0x%" PRIx64 ", size=0x%" PRIx64 ": %s", | |
381 | __func__, mem.slot, slot->start_addr, | |
382 | (uint64_t)mem.memory_size, strerror(errno)); | |
383 | } | |
fe29141b | 384 | return ret; |
5832d1f2 AL |
385 | } |
386 | ||
57038a92 | 387 | static int do_kvm_destroy_vcpu(CPUState *cpu) |
4c055ab5 GZ |
388 | { |
389 | KVMState *s = kvm_state; | |
390 | long mmap_size; | |
391 | struct KVMParkedVcpu *vcpu = NULL; | |
392 | int ret = 0; | |
393 | ||
394 | DPRINTF("kvm_destroy_vcpu\n"); | |
395 | ||
b1115c99 LA |
396 | ret = kvm_arch_destroy_vcpu(cpu); |
397 | if (ret < 0) { | |
398 | goto err; | |
399 | } | |
400 | ||
4c055ab5 GZ |
401 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); |
402 | if (mmap_size < 0) { | |
403 | ret = mmap_size; | |
404 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); | |
405 | goto err; | |
406 | } | |
407 | ||
408 | ret = munmap(cpu->kvm_run, mmap_size); | |
409 | if (ret < 0) { | |
410 | goto err; | |
411 | } | |
412 | ||
b4420f19 PX |
413 | if (cpu->kvm_dirty_gfns) { |
414 | ret = munmap(cpu->kvm_dirty_gfns, s->kvm_dirty_ring_size); | |
415 | if (ret < 0) { | |
416 | goto err; | |
417 | } | |
418 | } | |
419 | ||
4c055ab5 GZ |
420 | vcpu = g_malloc0(sizeof(*vcpu)); |
421 | vcpu->vcpu_id = kvm_arch_vcpu_id(cpu); | |
422 | vcpu->kvm_fd = cpu->kvm_fd; | |
423 | QLIST_INSERT_HEAD(&kvm_state->kvm_parked_vcpus, vcpu, node); | |
424 | err: | |
425 | return ret; | |
426 | } | |
427 | ||
57038a92 CF |
428 | void kvm_destroy_vcpu(CPUState *cpu) |
429 | { | |
430 | if (do_kvm_destroy_vcpu(cpu) < 0) { | |
431 | error_report("kvm_destroy_vcpu failed"); | |
432 | exit(EXIT_FAILURE); | |
433 | } | |
434 | } | |
435 | ||
4c055ab5 GZ |
436 | static int kvm_get_vcpu(KVMState *s, unsigned long vcpu_id) |
437 | { | |
438 | struct KVMParkedVcpu *cpu; | |
439 | ||
440 | QLIST_FOREACH(cpu, &s->kvm_parked_vcpus, node) { | |
441 | if (cpu->vcpu_id == vcpu_id) { | |
442 | int kvm_fd; | |
443 | ||
444 | QLIST_REMOVE(cpu, node); | |
445 | kvm_fd = cpu->kvm_fd; | |
446 | g_free(cpu); | |
447 | return kvm_fd; | |
448 | } | |
449 | } | |
450 | ||
451 | return kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)vcpu_id); | |
452 | } | |
453 | ||
d0a92b35 | 454 | int kvm_init_vcpu(CPUState *cpu, Error **errp) |
05330448 AL |
455 | { |
456 | KVMState *s = kvm_state; | |
457 | long mmap_size; | |
458 | int ret; | |
459 | ||
d0a92b35 | 460 | trace_kvm_init_vcpu(cpu->cpu_index, kvm_arch_vcpu_id(cpu)); |
05330448 | 461 | |
4c055ab5 | 462 | ret = kvm_get_vcpu(s, kvm_arch_vcpu_id(cpu)); |
05330448 | 463 | if (ret < 0) { |
d0a92b35 DDAG |
464 | error_setg_errno(errp, -ret, "kvm_init_vcpu: kvm_get_vcpu failed (%lu)", |
465 | kvm_arch_vcpu_id(cpu)); | |
05330448 AL |
466 | goto err; |
467 | } | |
468 | ||
8737c51c | 469 | cpu->kvm_fd = ret; |
a60f24b5 | 470 | cpu->kvm_state = s; |
99f31832 | 471 | cpu->vcpu_dirty = true; |
05330448 AL |
472 | |
473 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
474 | if (mmap_size < 0) { | |
748a680b | 475 | ret = mmap_size; |
d0a92b35 DDAG |
476 | error_setg_errno(errp, -mmap_size, |
477 | "kvm_init_vcpu: KVM_GET_VCPU_MMAP_SIZE failed"); | |
05330448 AL |
478 | goto err; |
479 | } | |
480 | ||
f7575c96 | 481 | cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, |
8737c51c | 482 | cpu->kvm_fd, 0); |
f7575c96 | 483 | if (cpu->kvm_run == MAP_FAILED) { |
05330448 | 484 | ret = -errno; |
d0a92b35 DDAG |
485 | error_setg_errno(errp, ret, |
486 | "kvm_init_vcpu: mmap'ing vcpu state failed (%lu)", | |
487 | kvm_arch_vcpu_id(cpu)); | |
05330448 AL |
488 | goto err; |
489 | } | |
490 | ||
a426e122 JK |
491 | if (s->coalesced_mmio && !s->coalesced_mmio_ring) { |
492 | s->coalesced_mmio_ring = | |
f7575c96 | 493 | (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE; |
a426e122 | 494 | } |
62a2744c | 495 | |
b4420f19 PX |
496 | if (s->kvm_dirty_ring_size) { |
497 | /* Use MAP_SHARED to share pages with the kernel */ | |
498 | cpu->kvm_dirty_gfns = mmap(NULL, s->kvm_dirty_ring_size, | |
499 | PROT_READ | PROT_WRITE, MAP_SHARED, | |
500 | cpu->kvm_fd, | |
501 | PAGE_SIZE * KVM_DIRTY_LOG_PAGE_OFFSET); | |
502 | if (cpu->kvm_dirty_gfns == MAP_FAILED) { | |
503 | ret = -errno; | |
504 | DPRINTF("mmap'ing vcpu dirty gfns failed: %d\n", ret); | |
505 | goto err; | |
506 | } | |
507 | } | |
508 | ||
20d695a9 | 509 | ret = kvm_arch_init_vcpu(cpu); |
d0a92b35 DDAG |
510 | if (ret < 0) { |
511 | error_setg_errno(errp, -ret, | |
512 | "kvm_init_vcpu: kvm_arch_init_vcpu failed (%lu)", | |
513 | kvm_arch_vcpu_id(cpu)); | |
514 | } | |
05330448 AL |
515 | err: |
516 | return ret; | |
517 | } | |
518 | ||
5832d1f2 AL |
519 | /* |
520 | * dirty pages logging control | |
521 | */ | |
25254bbc | 522 | |
d6ff5cbc | 523 | static int kvm_mem_flags(MemoryRegion *mr) |
25254bbc | 524 | { |
d6ff5cbc | 525 | bool readonly = mr->readonly || memory_region_is_romd(mr); |
235e8982 | 526 | int flags = 0; |
d6ff5cbc AJ |
527 | |
528 | if (memory_region_get_dirty_log_mask(mr) != 0) { | |
529 | flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
530 | } | |
235e8982 JJ |
531 | if (readonly && kvm_readonly_mem_allowed) { |
532 | flags |= KVM_MEM_READONLY; | |
533 | } | |
534 | return flags; | |
25254bbc MT |
535 | } |
536 | ||
36adac49 | 537 | /* Called with KVMMemoryListener.slots_lock held */ |
7bbda04c PB |
538 | static int kvm_slot_update_flags(KVMMemoryListener *kml, KVMSlot *mem, |
539 | MemoryRegion *mr) | |
5832d1f2 | 540 | { |
d6ff5cbc | 541 | mem->flags = kvm_mem_flags(mr); |
5832d1f2 | 542 | |
4495d6a7 | 543 | /* If nothing changed effectively, no need to issue ioctl */ |
6c090d4a | 544 | if (mem->flags == mem->old_flags) { |
25254bbc | 545 | return 0; |
4495d6a7 JK |
546 | } |
547 | ||
ea776d15 | 548 | kvm_slot_init_dirty_bitmap(mem); |
6c090d4a | 549 | return kvm_set_user_memory_region(kml, mem, false); |
5832d1f2 AL |
550 | } |
551 | ||
7bbda04c PB |
552 | static int kvm_section_update_flags(KVMMemoryListener *kml, |
553 | MemoryRegionSection *section) | |
25254bbc | 554 | { |
023ae9a8 | 555 | hwaddr start_addr, size, slot_size; |
343562e8 | 556 | KVMSlot *mem; |
36adac49 | 557 | int ret = 0; |
25254bbc | 558 | |
343562e8 DH |
559 | size = kvm_align_section(section, &start_addr); |
560 | if (!size) { | |
ea8cb1a8 | 561 | return 0; |
25254bbc | 562 | } |
343562e8 | 563 | |
a2f77862 | 564 | kvm_slots_lock(); |
36adac49 | 565 | |
023ae9a8 IM |
566 | while (size && !ret) { |
567 | slot_size = MIN(kvm_max_slot_size, size); | |
568 | mem = kvm_lookup_matching_slot(kml, start_addr, slot_size); | |
569 | if (!mem) { | |
570 | /* We don't have a slot if we want to trap every access. */ | |
571 | goto out; | |
572 | } | |
343562e8 | 573 | |
023ae9a8 IM |
574 | ret = kvm_slot_update_flags(kml, mem, section->mr); |
575 | start_addr += slot_size; | |
576 | size -= slot_size; | |
577 | } | |
36adac49 PX |
578 | |
579 | out: | |
a2f77862 | 580 | kvm_slots_unlock(); |
36adac49 | 581 | return ret; |
25254bbc MT |
582 | } |
583 | ||
a01672d3 | 584 | static void kvm_log_start(MemoryListener *listener, |
b2dfd71c PB |
585 | MemoryRegionSection *section, |
586 | int old, int new) | |
5832d1f2 | 587 | { |
7bbda04c | 588 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
589 | int r; |
590 | ||
b2dfd71c PB |
591 | if (old != 0) { |
592 | return; | |
593 | } | |
594 | ||
7bbda04c | 595 | r = kvm_section_update_flags(kml, section); |
a01672d3 AK |
596 | if (r < 0) { |
597 | abort(); | |
598 | } | |
5832d1f2 AL |
599 | } |
600 | ||
a01672d3 | 601 | static void kvm_log_stop(MemoryListener *listener, |
b2dfd71c PB |
602 | MemoryRegionSection *section, |
603 | int old, int new) | |
5832d1f2 | 604 | { |
7bbda04c | 605 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
606 | int r; |
607 | ||
b2dfd71c PB |
608 | if (new != 0) { |
609 | return; | |
610 | } | |
611 | ||
7bbda04c | 612 | r = kvm_section_update_flags(kml, section); |
a01672d3 AK |
613 | if (r < 0) { |
614 | abort(); | |
615 | } | |
5832d1f2 AL |
616 | } |
617 | ||
8369e01c | 618 | /* get kvm's dirty pages bitmap and update qemu's */ |
2c20b27e | 619 | static void kvm_slot_sync_dirty_pages(KVMSlot *slot) |
96c1606b | 620 | { |
2c20b27e PX |
621 | ram_addr_t start = slot->ram_start_offset; |
622 | ram_addr_t pages = slot->memory_size / qemu_real_host_page_size; | |
5ff7fb77 | 623 | |
2c20b27e | 624 | cpu_physical_memory_set_dirty_lebitmap(slot->dirty_bmap, start, pages); |
96c1606b AG |
625 | } |
626 | ||
b4420f19 PX |
627 | static void kvm_slot_reset_dirty_pages(KVMSlot *slot) |
628 | { | |
629 | memset(slot->dirty_bmap, 0, slot->dirty_bmap_size); | |
630 | } | |
631 | ||
8369e01c MT |
632 | #define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) |
633 | ||
9b3a31c7 | 634 | /* Allocate the dirty bitmap for a slot */ |
ea776d15 | 635 | static void kvm_slot_init_dirty_bitmap(KVMSlot *mem) |
9b3a31c7 | 636 | { |
ea776d15 PX |
637 | if (!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) || mem->dirty_bmap) { |
638 | return; | |
639 | } | |
640 | ||
9b3a31c7 DDAG |
641 | /* |
642 | * XXX bad kernel interface alert | |
643 | * For dirty bitmap, kernel allocates array of size aligned to | |
644 | * bits-per-long. But for case when the kernel is 64bits and | |
645 | * the userspace is 32bits, userspace can't align to the same | |
646 | * bits-per-long, since sizeof(long) is different between kernel | |
647 | * and user space. This way, userspace will provide buffer which | |
648 | * may be 4 bytes less than the kernel will use, resulting in | |
649 | * userspace memory corruption (which is not detectable by valgrind | |
650 | * too, in most cases). | |
651 | * So for now, let's align to 64 instead of HOST_LONG_BITS here, in | |
652 | * a hope that sizeof(long) won't become >8 any time soon. | |
e0a8f993 KZ |
653 | * |
654 | * Note: the granule of kvm dirty log is qemu_real_host_page_size. | |
655 | * And mem->memory_size is aligned to it (otherwise this mem can't | |
656 | * be registered to KVM). | |
9b3a31c7 | 657 | */ |
e0a8f993 | 658 | hwaddr bitmap_size = ALIGN(mem->memory_size / qemu_real_host_page_size, |
9b3a31c7 DDAG |
659 | /*HOST_LONG_BITS*/ 64) / 8; |
660 | mem->dirty_bmap = g_malloc0(bitmap_size); | |
563d32ba | 661 | mem->dirty_bmap_size = bitmap_size; |
9b3a31c7 DDAG |
662 | } |
663 | ||
e65e5f50 PX |
664 | /* |
665 | * Sync dirty bitmap from kernel to KVMSlot.dirty_bmap, return true if | |
666 | * succeeded, false otherwise | |
667 | */ | |
668 | static bool kvm_slot_get_dirty_log(KVMState *s, KVMSlot *slot) | |
669 | { | |
670 | struct kvm_dirty_log d = {}; | |
671 | int ret; | |
672 | ||
673 | d.dirty_bitmap = slot->dirty_bmap; | |
674 | d.slot = slot->slot | (slot->as_id << 16); | |
675 | ret = kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d); | |
676 | ||
677 | if (ret == -ENOENT) { | |
678 | /* kernel does not have dirty bitmap in this slot */ | |
679 | ret = 0; | |
680 | } | |
681 | if (ret) { | |
682 | error_report_once("%s: KVM_GET_DIRTY_LOG failed with %d", | |
683 | __func__, ret); | |
684 | } | |
685 | return ret == 0; | |
686 | } | |
687 | ||
b4420f19 PX |
688 | /* Should be with all slots_lock held for the address spaces. */ |
689 | static void kvm_dirty_ring_mark_page(KVMState *s, uint32_t as_id, | |
690 | uint32_t slot_id, uint64_t offset) | |
691 | { | |
692 | KVMMemoryListener *kml; | |
693 | KVMSlot *mem; | |
694 | ||
695 | if (as_id >= s->nr_as) { | |
696 | return; | |
697 | } | |
698 | ||
699 | kml = s->as[as_id].ml; | |
700 | mem = &kml->slots[slot_id]; | |
701 | ||
702 | if (!mem->memory_size || offset >= | |
703 | (mem->memory_size / qemu_real_host_page_size)) { | |
704 | return; | |
705 | } | |
706 | ||
707 | set_bit(offset, mem->dirty_bmap); | |
708 | } | |
709 | ||
710 | static bool dirty_gfn_is_dirtied(struct kvm_dirty_gfn *gfn) | |
711 | { | |
712 | return gfn->flags == KVM_DIRTY_GFN_F_DIRTY; | |
713 | } | |
714 | ||
715 | static void dirty_gfn_set_collected(struct kvm_dirty_gfn *gfn) | |
716 | { | |
717 | gfn->flags = KVM_DIRTY_GFN_F_RESET; | |
718 | } | |
719 | ||
720 | /* | |
721 | * Should be with all slots_lock held for the address spaces. It returns the | |
722 | * dirty page we've collected on this dirty ring. | |
723 | */ | |
724 | static uint32_t kvm_dirty_ring_reap_one(KVMState *s, CPUState *cpu) | |
725 | { | |
726 | struct kvm_dirty_gfn *dirty_gfns = cpu->kvm_dirty_gfns, *cur; | |
727 | uint32_t ring_size = s->kvm_dirty_ring_size; | |
728 | uint32_t count = 0, fetch = cpu->kvm_fetch_index; | |
729 | ||
730 | assert(dirty_gfns && ring_size); | |
731 | trace_kvm_dirty_ring_reap_vcpu(cpu->cpu_index); | |
732 | ||
733 | while (true) { | |
734 | cur = &dirty_gfns[fetch % ring_size]; | |
735 | if (!dirty_gfn_is_dirtied(cur)) { | |
736 | break; | |
737 | } | |
738 | kvm_dirty_ring_mark_page(s, cur->slot >> 16, cur->slot & 0xffff, | |
739 | cur->offset); | |
740 | dirty_gfn_set_collected(cur); | |
741 | trace_kvm_dirty_ring_page(cpu->cpu_index, fetch, cur->offset); | |
742 | fetch++; | |
743 | count++; | |
744 | } | |
745 | cpu->kvm_fetch_index = fetch; | |
746 | ||
747 | return count; | |
748 | } | |
749 | ||
750 | /* Must be with slots_lock held */ | |
751 | static uint64_t kvm_dirty_ring_reap_locked(KVMState *s) | |
752 | { | |
753 | int ret; | |
754 | CPUState *cpu; | |
755 | uint64_t total = 0; | |
756 | int64_t stamp; | |
757 | ||
758 | stamp = get_clock(); | |
759 | ||
760 | CPU_FOREACH(cpu) { | |
761 | total += kvm_dirty_ring_reap_one(s, cpu); | |
762 | } | |
763 | ||
764 | if (total) { | |
765 | ret = kvm_vm_ioctl(s, KVM_RESET_DIRTY_RINGS); | |
766 | assert(ret == total); | |
767 | } | |
768 | ||
769 | stamp = get_clock() - stamp; | |
770 | ||
771 | if (total) { | |
772 | trace_kvm_dirty_ring_reap(total, stamp / 1000); | |
773 | } | |
774 | ||
775 | return total; | |
776 | } | |
777 | ||
778 | /* | |
779 | * Currently for simplicity, we must hold BQL before calling this. We can | |
780 | * consider to drop the BQL if we're clear with all the race conditions. | |
781 | */ | |
782 | static uint64_t kvm_dirty_ring_reap(KVMState *s) | |
783 | { | |
784 | uint64_t total; | |
785 | ||
786 | /* | |
787 | * We need to lock all kvm slots for all address spaces here, | |
788 | * because: | |
789 | * | |
790 | * (1) We need to mark dirty for dirty bitmaps in multiple slots | |
791 | * and for tons of pages, so it's better to take the lock here | |
792 | * once rather than once per page. And more importantly, | |
793 | * | |
794 | * (2) We must _NOT_ publish dirty bits to the other threads | |
795 | * (e.g., the migration thread) via the kvm memory slot dirty | |
796 | * bitmaps before correctly re-protect those dirtied pages. | |
797 | * Otherwise we can have potential risk of data corruption if | |
798 | * the page data is read in the other thread before we do | |
799 | * reset below. | |
800 | */ | |
801 | kvm_slots_lock(); | |
802 | total = kvm_dirty_ring_reap_locked(s); | |
803 | kvm_slots_unlock(); | |
804 | ||
805 | return total; | |
806 | } | |
807 | ||
808 | static void do_kvm_cpu_synchronize_kick(CPUState *cpu, run_on_cpu_data arg) | |
809 | { | |
810 | /* No need to do anything */ | |
811 | } | |
812 | ||
813 | /* | |
814 | * Kick all vcpus out in a synchronized way. When returned, we | |
815 | * guarantee that every vcpu has been kicked and at least returned to | |
816 | * userspace once. | |
817 | */ | |
818 | static void kvm_cpu_synchronize_kick_all(void) | |
819 | { | |
820 | CPUState *cpu; | |
821 | ||
822 | CPU_FOREACH(cpu) { | |
823 | run_on_cpu(cpu, do_kvm_cpu_synchronize_kick, RUN_ON_CPU_NULL); | |
824 | } | |
825 | } | |
826 | ||
827 | /* | |
828 | * Flush all the existing dirty pages to the KVM slot buffers. When | |
829 | * this call returns, we guarantee that all the touched dirty pages | |
830 | * before calling this function have been put into the per-kvmslot | |
831 | * dirty bitmap. | |
832 | * | |
833 | * This function must be called with BQL held. | |
834 | */ | |
835 | static void kvm_dirty_ring_flush(void) | |
836 | { | |
837 | trace_kvm_dirty_ring_flush(0); | |
838 | /* | |
839 | * The function needs to be serialized. Since this function | |
840 | * should always be with BQL held, serialization is guaranteed. | |
841 | * However, let's be sure of it. | |
842 | */ | |
843 | assert(qemu_mutex_iothread_locked()); | |
844 | /* | |
845 | * First make sure to flush the hardware buffers by kicking all | |
846 | * vcpus out in a synchronous way. | |
847 | */ | |
848 | kvm_cpu_synchronize_kick_all(); | |
849 | kvm_dirty_ring_reap(kvm_state); | |
850 | trace_kvm_dirty_ring_flush(1); | |
851 | } | |
852 | ||
5832d1f2 | 853 | /** |
4a12a11a | 854 | * kvm_physical_sync_dirty_bitmap - Sync dirty bitmap from kernel space |
5832d1f2 | 855 | * |
4a12a11a PX |
856 | * This function will first try to fetch dirty bitmap from the kernel, |
857 | * and then updates qemu's dirty bitmap. | |
858 | * | |
36adac49 PX |
859 | * NOTE: caller must be with kml->slots_lock held. |
860 | * | |
4a12a11a PX |
861 | * @kml: the KVM memory listener object |
862 | * @section: the memory section to sync the dirty bitmap with | |
5832d1f2 | 863 | */ |
e65e5f50 PX |
864 | static void kvm_physical_sync_dirty_bitmap(KVMMemoryListener *kml, |
865 | MemoryRegionSection *section) | |
5832d1f2 AL |
866 | { |
867 | KVMState *s = kvm_state; | |
151f7749 | 868 | KVMSlot *mem; |
67548f09 | 869 | hwaddr start_addr, size; |
2c20b27e | 870 | hwaddr slot_size; |
67548f09 DH |
871 | |
872 | size = kvm_align_section(section, &start_addr); | |
023ae9a8 | 873 | while (size) { |
023ae9a8 IM |
874 | slot_size = MIN(kvm_max_slot_size, size); |
875 | mem = kvm_lookup_matching_slot(kml, start_addr, slot_size); | |
67548f09 | 876 | if (!mem) { |
e377e87c | 877 | /* We don't have a slot if we want to trap every access. */ |
e65e5f50 | 878 | return; |
151f7749 | 879 | } |
e65e5f50 | 880 | if (kvm_slot_get_dirty_log(s, mem)) { |
2c20b27e | 881 | kvm_slot_sync_dirty_pages(mem); |
151f7749 | 882 | } |
023ae9a8 IM |
883 | start_addr += slot_size; |
884 | size -= slot_size; | |
5832d1f2 | 885 | } |
5832d1f2 AL |
886 | } |
887 | ||
ff4aa114 PX |
888 | /* Alignment requirement for KVM_CLEAR_DIRTY_LOG - 64 pages */ |
889 | #define KVM_CLEAR_LOG_SHIFT 6 | |
890 | #define KVM_CLEAR_LOG_ALIGN (qemu_real_host_page_size << KVM_CLEAR_LOG_SHIFT) | |
891 | #define KVM_CLEAR_LOG_MASK (-KVM_CLEAR_LOG_ALIGN) | |
892 | ||
4222147d PB |
893 | static int kvm_log_clear_one_slot(KVMSlot *mem, int as_id, uint64_t start, |
894 | uint64_t size) | |
ff4aa114 PX |
895 | { |
896 | KVMState *s = kvm_state; | |
4222147d | 897 | uint64_t end, bmap_start, start_delta, bmap_npages; |
ff4aa114 | 898 | struct kvm_clear_dirty_log d; |
ff4aa114 | 899 | unsigned long *bmap_clear = NULL, psize = qemu_real_host_page_size; |
4222147d | 900 | int ret; |
ff4aa114 PX |
901 | |
902 | /* | |
903 | * We need to extend either the start or the size or both to | |
904 | * satisfy the KVM interface requirement. Firstly, do the start | |
905 | * page alignment on 64 host pages | |
906 | */ | |
84516e5b PB |
907 | bmap_start = start & KVM_CLEAR_LOG_MASK; |
908 | start_delta = start - bmap_start; | |
ff4aa114 PX |
909 | bmap_start /= psize; |
910 | ||
911 | /* | |
912 | * The kernel interface has restriction on the size too, that either: | |
913 | * | |
914 | * (1) the size is 64 host pages aligned (just like the start), or | |
915 | * (2) the size fills up until the end of the KVM memslot. | |
916 | */ | |
917 | bmap_npages = DIV_ROUND_UP(size + start_delta, KVM_CLEAR_LOG_ALIGN) | |
918 | << KVM_CLEAR_LOG_SHIFT; | |
919 | end = mem->memory_size / psize; | |
920 | if (bmap_npages > end - bmap_start) { | |
921 | bmap_npages = end - bmap_start; | |
922 | } | |
923 | start_delta /= psize; | |
924 | ||
925 | /* | |
926 | * Prepare the bitmap to clear dirty bits. Here we must guarantee | |
927 | * that we won't clear any unknown dirty bits otherwise we might | |
928 | * accidentally clear some set bits which are not yet synced from | |
929 | * the kernel into QEMU's bitmap, then we'll lose track of the | |
930 | * guest modifications upon those pages (which can directly lead | |
931 | * to guest data loss or panic after migration). | |
932 | * | |
933 | * Layout of the KVMSlot.dirty_bmap: | |
934 | * | |
935 | * |<-------- bmap_npages -----------..>| | |
936 | * [1] | |
937 | * start_delta size | |
938 | * |----------------|-------------|------------------|------------| | |
939 | * ^ ^ ^ ^ | |
940 | * | | | | | |
941 | * start bmap_start (start) end | |
942 | * of memslot of memslot | |
943 | * | |
944 | * [1] bmap_npages can be aligned to either 64 pages or the end of slot | |
945 | */ | |
946 | ||
947 | assert(bmap_start % BITS_PER_LONG == 0); | |
948 | /* We should never do log_clear before log_sync */ | |
949 | assert(mem->dirty_bmap); | |
4054adbd | 950 | if (start_delta || bmap_npages - size / psize) { |
ff4aa114 PX |
951 | /* Slow path - we need to manipulate a temp bitmap */ |
952 | bmap_clear = bitmap_new(bmap_npages); | |
953 | bitmap_copy_with_src_offset(bmap_clear, mem->dirty_bmap, | |
954 | bmap_start, start_delta + size / psize); | |
955 | /* | |
956 | * We need to fill the holes at start because that was not | |
957 | * specified by the caller and we extended the bitmap only for | |
958 | * 64 pages alignment | |
959 | */ | |
960 | bitmap_clear(bmap_clear, 0, start_delta); | |
961 | d.dirty_bitmap = bmap_clear; | |
962 | } else { | |
4054adbd ZY |
963 | /* |
964 | * Fast path - both start and size align well with BITS_PER_LONG | |
965 | * (or the end of memory slot) | |
966 | */ | |
ff4aa114 PX |
967 | d.dirty_bitmap = mem->dirty_bmap + BIT_WORD(bmap_start); |
968 | } | |
969 | ||
970 | d.first_page = bmap_start; | |
971 | /* It should never overflow. If it happens, say something */ | |
972 | assert(bmap_npages <= UINT32_MAX); | |
973 | d.num_pages = bmap_npages; | |
4222147d | 974 | d.slot = mem->slot | (as_id << 16); |
ff4aa114 | 975 | |
38e0b790 TH |
976 | ret = kvm_vm_ioctl(s, KVM_CLEAR_DIRTY_LOG, &d); |
977 | if (ret < 0 && ret != -ENOENT) { | |
ff4aa114 PX |
978 | error_report("%s: KVM_CLEAR_DIRTY_LOG failed, slot=%d, " |
979 | "start=0x%"PRIx64", size=0x%"PRIx32", errno=%d", | |
980 | __func__, d.slot, (uint64_t)d.first_page, | |
981 | (uint32_t)d.num_pages, ret); | |
982 | } else { | |
983 | ret = 0; | |
984 | trace_kvm_clear_dirty_log(d.slot, d.first_page, d.num_pages); | |
985 | } | |
986 | ||
987 | /* | |
988 | * After we have updated the remote dirty bitmap, we update the | |
989 | * cached bitmap as well for the memslot, then if another user | |
990 | * clears the same region we know we shouldn't clear it again on | |
991 | * the remote otherwise it's data loss as well. | |
992 | */ | |
993 | bitmap_clear(mem->dirty_bmap, bmap_start + start_delta, | |
994 | size / psize); | |
995 | /* This handles the NULL case well */ | |
996 | g_free(bmap_clear); | |
4222147d PB |
997 | return ret; |
998 | } | |
999 | ||
1000 | ||
1001 | /** | |
1002 | * kvm_physical_log_clear - Clear the kernel's dirty bitmap for range | |
1003 | * | |
1004 | * NOTE: this will be a no-op if we haven't enabled manual dirty log | |
1005 | * protection in the host kernel because in that case this operation | |
1006 | * will be done within log_sync(). | |
1007 | * | |
1008 | * @kml: the kvm memory listener | |
1009 | * @section: the memory range to clear dirty bitmap | |
1010 | */ | |
1011 | static int kvm_physical_log_clear(KVMMemoryListener *kml, | |
1012 | MemoryRegionSection *section) | |
1013 | { | |
1014 | KVMState *s = kvm_state; | |
84516e5b PB |
1015 | uint64_t start, size, offset, count; |
1016 | KVMSlot *mem; | |
87287ac0 | 1017 | int ret = 0, i; |
4222147d PB |
1018 | |
1019 | if (!s->manual_dirty_log_protect) { | |
1020 | /* No need to do explicit clear */ | |
87287ac0 | 1021 | return ret; |
4222147d PB |
1022 | } |
1023 | ||
1024 | start = section->offset_within_address_space; | |
1025 | size = int128_get64(section->size); | |
1026 | ||
1027 | if (!size) { | |
1028 | /* Nothing more we can do... */ | |
87287ac0 | 1029 | return ret; |
4222147d PB |
1030 | } |
1031 | ||
a2f77862 | 1032 | kvm_slots_lock(); |
4222147d | 1033 | |
4222147d PB |
1034 | for (i = 0; i < s->nr_slots; i++) { |
1035 | mem = &kml->slots[i]; | |
84516e5b PB |
1036 | /* Discard slots that are empty or do not overlap the section */ |
1037 | if (!mem->memory_size || | |
1038 | mem->start_addr > start + size - 1 || | |
1039 | start > mem->start_addr + mem->memory_size - 1) { | |
1040 | continue; | |
1041 | } | |
1042 | ||
1043 | if (start >= mem->start_addr) { | |
1044 | /* The slot starts before section or is aligned to it. */ | |
1045 | offset = start - mem->start_addr; | |
1046 | count = MIN(mem->memory_size - offset, size); | |
1047 | } else { | |
1048 | /* The slot starts after section. */ | |
1049 | offset = 0; | |
1050 | count = MIN(mem->memory_size, size - (mem->start_addr - start)); | |
1051 | } | |
1052 | ret = kvm_log_clear_one_slot(mem, kml->as_id, offset, count); | |
1053 | if (ret < 0) { | |
4222147d PB |
1054 | break; |
1055 | } | |
1056 | } | |
1057 | ||
a2f77862 | 1058 | kvm_slots_unlock(); |
ff4aa114 PX |
1059 | |
1060 | return ret; | |
1061 | } | |
1062 | ||
95d2994a AK |
1063 | static void kvm_coalesce_mmio_region(MemoryListener *listener, |
1064 | MemoryRegionSection *secion, | |
a8170e5e | 1065 | hwaddr start, hwaddr size) |
f65ed4c1 | 1066 | { |
f65ed4c1 AL |
1067 | KVMState *s = kvm_state; |
1068 | ||
1069 | if (s->coalesced_mmio) { | |
1070 | struct kvm_coalesced_mmio_zone zone; | |
1071 | ||
1072 | zone.addr = start; | |
1073 | zone.size = size; | |
7e680753 | 1074 | zone.pad = 0; |
f65ed4c1 | 1075 | |
95d2994a | 1076 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 1077 | } |
f65ed4c1 AL |
1078 | } |
1079 | ||
95d2994a AK |
1080 | static void kvm_uncoalesce_mmio_region(MemoryListener *listener, |
1081 | MemoryRegionSection *secion, | |
a8170e5e | 1082 | hwaddr start, hwaddr size) |
f65ed4c1 | 1083 | { |
f65ed4c1 AL |
1084 | KVMState *s = kvm_state; |
1085 | ||
1086 | if (s->coalesced_mmio) { | |
1087 | struct kvm_coalesced_mmio_zone zone; | |
1088 | ||
1089 | zone.addr = start; | |
1090 | zone.size = size; | |
7e680753 | 1091 | zone.pad = 0; |
f65ed4c1 | 1092 | |
95d2994a | 1093 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 1094 | } |
f65ed4c1 AL |
1095 | } |
1096 | ||
e6d34aee PH |
1097 | static void kvm_coalesce_pio_add(MemoryListener *listener, |
1098 | MemoryRegionSection *section, | |
1099 | hwaddr start, hwaddr size) | |
1100 | { | |
1101 | KVMState *s = kvm_state; | |
1102 | ||
1103 | if (s->coalesced_pio) { | |
1104 | struct kvm_coalesced_mmio_zone zone; | |
1105 | ||
1106 | zone.addr = start; | |
1107 | zone.size = size; | |
1108 | zone.pio = 1; | |
1109 | ||
1110 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); | |
1111 | } | |
1112 | } | |
1113 | ||
1114 | static void kvm_coalesce_pio_del(MemoryListener *listener, | |
1115 | MemoryRegionSection *section, | |
1116 | hwaddr start, hwaddr size) | |
1117 | { | |
1118 | KVMState *s = kvm_state; | |
1119 | ||
1120 | if (s->coalesced_pio) { | |
1121 | struct kvm_coalesced_mmio_zone zone; | |
1122 | ||
1123 | zone.addr = start; | |
1124 | zone.size = size; | |
1125 | zone.pio = 1; | |
1126 | ||
1127 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | static MemoryListener kvm_coalesced_pio_listener = { | |
1132 | .coalesced_io_add = kvm_coalesce_pio_add, | |
1133 | .coalesced_io_del = kvm_coalesce_pio_del, | |
1134 | }; | |
1135 | ||
ad7b8b33 AL |
1136 | int kvm_check_extension(KVMState *s, unsigned int extension) |
1137 | { | |
1138 | int ret; | |
1139 | ||
1140 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
1141 | if (ret < 0) { | |
1142 | ret = 0; | |
1143 | } | |
1144 | ||
1145 | return ret; | |
1146 | } | |
1147 | ||
7d0a07fa AG |
1148 | int kvm_vm_check_extension(KVMState *s, unsigned int extension) |
1149 | { | |
1150 | int ret; | |
1151 | ||
1152 | ret = kvm_vm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
1153 | if (ret < 0) { | |
1154 | /* VM wide version not implemented, use global one instead */ | |
1155 | ret = kvm_check_extension(s, extension); | |
1156 | } | |
1157 | ||
1158 | return ret; | |
1159 | } | |
1160 | ||
6b552b9b DG |
1161 | typedef struct HWPoisonPage { |
1162 | ram_addr_t ram_addr; | |
1163 | QLIST_ENTRY(HWPoisonPage) list; | |
1164 | } HWPoisonPage; | |
1165 | ||
1166 | static QLIST_HEAD(, HWPoisonPage) hwpoison_page_list = | |
1167 | QLIST_HEAD_INITIALIZER(hwpoison_page_list); | |
1168 | ||
1169 | static void kvm_unpoison_all(void *param) | |
1170 | { | |
1171 | HWPoisonPage *page, *next_page; | |
1172 | ||
1173 | QLIST_FOREACH_SAFE(page, &hwpoison_page_list, list, next_page) { | |
1174 | QLIST_REMOVE(page, list); | |
1175 | qemu_ram_remap(page->ram_addr, TARGET_PAGE_SIZE); | |
1176 | g_free(page); | |
1177 | } | |
1178 | } | |
1179 | ||
1180 | void kvm_hwpoison_page_add(ram_addr_t ram_addr) | |
1181 | { | |
1182 | HWPoisonPage *page; | |
1183 | ||
1184 | QLIST_FOREACH(page, &hwpoison_page_list, list) { | |
1185 | if (page->ram_addr == ram_addr) { | |
1186 | return; | |
1187 | } | |
1188 | } | |
1189 | page = g_new(HWPoisonPage, 1); | |
1190 | page->ram_addr = ram_addr; | |
1191 | QLIST_INSERT_HEAD(&hwpoison_page_list, page, list); | |
1192 | } | |
1193 | ||
b680c5ba GK |
1194 | static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size) |
1195 | { | |
1196 | #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN) | |
1197 | /* The kernel expects ioeventfd values in HOST_WORDS_BIGENDIAN | |
1198 | * endianness, but the memory core hands them in target endianness. | |
1199 | * For example, PPC is always treated as big-endian even if running | |
1200 | * on KVM and on PPC64LE. Correct here. | |
1201 | */ | |
1202 | switch (size) { | |
1203 | case 2: | |
1204 | val = bswap16(val); | |
1205 | break; | |
1206 | case 4: | |
1207 | val = bswap32(val); | |
1208 | break; | |
1209 | } | |
1210 | #endif | |
1211 | return val; | |
1212 | } | |
1213 | ||
584f2be7 | 1214 | static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val, |
41cb62c2 | 1215 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
1216 | { |
1217 | int ret; | |
03a96b83 TH |
1218 | struct kvm_ioeventfd iofd = { |
1219 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, | |
1220 | .addr = addr, | |
1221 | .len = size, | |
1222 | .flags = 0, | |
1223 | .fd = fd, | |
1224 | }; | |
500ffd4a | 1225 | |
876d16cd DDAG |
1226 | trace_kvm_set_ioeventfd_mmio(fd, (uint64_t)addr, val, assign, size, |
1227 | datamatch); | |
500ffd4a MT |
1228 | if (!kvm_enabled()) { |
1229 | return -ENOSYS; | |
1230 | } | |
1231 | ||
41cb62c2 MT |
1232 | if (datamatch) { |
1233 | iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
1234 | } | |
500ffd4a MT |
1235 | if (!assign) { |
1236 | iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
1237 | } | |
1238 | ||
1239 | ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); | |
1240 | ||
1241 | if (ret < 0) { | |
1242 | return -errno; | |
1243 | } | |
1244 | ||
1245 | return 0; | |
1246 | } | |
1247 | ||
44c3f8f7 | 1248 | static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val, |
41cb62c2 | 1249 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
1250 | { |
1251 | struct kvm_ioeventfd kick = { | |
b680c5ba | 1252 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, |
500ffd4a | 1253 | .addr = addr, |
41cb62c2 | 1254 | .flags = KVM_IOEVENTFD_FLAG_PIO, |
44c3f8f7 | 1255 | .len = size, |
500ffd4a MT |
1256 | .fd = fd, |
1257 | }; | |
1258 | int r; | |
876d16cd | 1259 | trace_kvm_set_ioeventfd_pio(fd, addr, val, assign, size, datamatch); |
500ffd4a MT |
1260 | if (!kvm_enabled()) { |
1261 | return -ENOSYS; | |
1262 | } | |
41cb62c2 MT |
1263 | if (datamatch) { |
1264 | kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
1265 | } | |
500ffd4a MT |
1266 | if (!assign) { |
1267 | kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
1268 | } | |
1269 | r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); | |
1270 | if (r < 0) { | |
1271 | return r; | |
1272 | } | |
1273 | return 0; | |
1274 | } | |
1275 | ||
1276 | ||
d2f2b8a7 SH |
1277 | static int kvm_check_many_ioeventfds(void) |
1278 | { | |
d0dcac83 SH |
1279 | /* Userspace can use ioeventfd for io notification. This requires a host |
1280 | * that supports eventfd(2) and an I/O thread; since eventfd does not | |
1281 | * support SIGIO it cannot interrupt the vcpu. | |
1282 | * | |
1283 | * Older kernels have a 6 device limit on the KVM io bus. Find out so we | |
d2f2b8a7 SH |
1284 | * can avoid creating too many ioeventfds. |
1285 | */ | |
12d4536f | 1286 | #if defined(CONFIG_EVENTFD) |
d2f2b8a7 SH |
1287 | int ioeventfds[7]; |
1288 | int i, ret = 0; | |
1289 | for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { | |
1290 | ioeventfds[i] = eventfd(0, EFD_CLOEXEC); | |
1291 | if (ioeventfds[i] < 0) { | |
1292 | break; | |
1293 | } | |
41cb62c2 | 1294 | ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true); |
d2f2b8a7 SH |
1295 | if (ret < 0) { |
1296 | close(ioeventfds[i]); | |
1297 | break; | |
1298 | } | |
1299 | } | |
1300 | ||
1301 | /* Decide whether many devices are supported or not */ | |
1302 | ret = i == ARRAY_SIZE(ioeventfds); | |
1303 | ||
1304 | while (i-- > 0) { | |
41cb62c2 | 1305 | kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true); |
d2f2b8a7 SH |
1306 | close(ioeventfds[i]); |
1307 | } | |
1308 | return ret; | |
1309 | #else | |
1310 | return 0; | |
1311 | #endif | |
1312 | } | |
1313 | ||
94a8d39a JK |
1314 | static const KVMCapabilityInfo * |
1315 | kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list) | |
1316 | { | |
1317 | while (list->name) { | |
1318 | if (!kvm_check_extension(s, list->value)) { | |
1319 | return list; | |
1320 | } | |
1321 | list++; | |
1322 | } | |
1323 | return NULL; | |
1324 | } | |
1325 | ||
023ae9a8 IM |
1326 | void kvm_set_max_memslot_size(hwaddr max_slot_size) |
1327 | { | |
1328 | g_assert( | |
1329 | ROUND_UP(max_slot_size, qemu_real_host_page_size) == max_slot_size | |
1330 | ); | |
1331 | kvm_max_slot_size = max_slot_size; | |
1332 | } | |
1333 | ||
7bbda04c PB |
1334 | static void kvm_set_phys_mem(KVMMemoryListener *kml, |
1335 | MemoryRegionSection *section, bool add) | |
46dbef6a | 1336 | { |
f357f564 | 1337 | KVMSlot *mem; |
46dbef6a | 1338 | int err; |
a01672d3 | 1339 | MemoryRegion *mr = section->mr; |
235e8982 | 1340 | bool writeable = !mr->readonly && !mr->rom_device; |
2c20b27e PX |
1341 | hwaddr start_addr, size, slot_size, mr_offset; |
1342 | ram_addr_t ram_start_offset; | |
5ea69c2e | 1343 | void *ram; |
46dbef6a | 1344 | |
a01672d3 | 1345 | if (!memory_region_is_ram(mr)) { |
235e8982 JJ |
1346 | if (writeable || !kvm_readonly_mem_allowed) { |
1347 | return; | |
1348 | } else if (!mr->romd_mode) { | |
1349 | /* If the memory device is not in romd_mode, then we actually want | |
1350 | * to remove the kvm memory slot so all accesses will trap. */ | |
1351 | add = false; | |
1352 | } | |
9f213ed9 AK |
1353 | } |
1354 | ||
5ea69c2e DH |
1355 | size = kvm_align_section(section, &start_addr); |
1356 | if (!size) { | |
1357 | return; | |
1358 | } | |
1359 | ||
2c20b27e PX |
1360 | /* The offset of the kvmslot within the memory region */ |
1361 | mr_offset = section->offset_within_region + start_addr - | |
1362 | section->offset_within_address_space; | |
1363 | ||
1364 | /* use aligned delta to align the ram address and offset */ | |
1365 | ram = memory_region_get_ram_ptr(mr) + mr_offset; | |
1366 | ram_start_offset = memory_region_get_ram_addr(mr) + mr_offset; | |
a01672d3 | 1367 | |
a2f77862 | 1368 | kvm_slots_lock(); |
36adac49 | 1369 | |
f357f564 | 1370 | if (!add) { |
023ae9a8 IM |
1371 | do { |
1372 | slot_size = MIN(kvm_max_slot_size, size); | |
1373 | mem = kvm_lookup_matching_slot(kml, start_addr, slot_size); | |
1374 | if (!mem) { | |
1375 | goto out; | |
1376 | } | |
1377 | if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { | |
b4420f19 PX |
1378 | /* |
1379 | * NOTE: We should be aware of the fact that here we're only | |
1380 | * doing a best effort to sync dirty bits. No matter whether | |
1381 | * we're using dirty log or dirty ring, we ignored two facts: | |
1382 | * | |
1383 | * (1) dirty bits can reside in hardware buffers (PML) | |
1384 | * | |
1385 | * (2) after we collected dirty bits here, pages can be dirtied | |
1386 | * again before we do the final KVM_SET_USER_MEMORY_REGION to | |
1387 | * remove the slot. | |
1388 | * | |
1389 | * Not easy. Let's cross the fingers until it's fixed. | |
1390 | */ | |
1391 | if (kvm_state->kvm_dirty_ring_size) { | |
1392 | kvm_dirty_ring_reap_locked(kvm_state); | |
1393 | } else { | |
1394 | kvm_slot_get_dirty_log(kvm_state, mem); | |
1395 | } | |
29b7e8be | 1396 | kvm_slot_sync_dirty_pages(mem); |
023ae9a8 | 1397 | } |
3fbffb62 | 1398 | |
023ae9a8 IM |
1399 | /* unregister the slot */ |
1400 | g_free(mem->dirty_bmap); | |
1401 | mem->dirty_bmap = NULL; | |
1402 | mem->memory_size = 0; | |
1403 | mem->flags = 0; | |
1404 | err = kvm_set_user_memory_region(kml, mem, false); | |
1405 | if (err) { | |
1406 | fprintf(stderr, "%s: error unregistering slot: %s\n", | |
1407 | __func__, strerror(-err)); | |
1408 | abort(); | |
1409 | } | |
1410 | start_addr += slot_size; | |
1411 | size -= slot_size; | |
1412 | } while (size); | |
36adac49 | 1413 | goto out; |
46dbef6a MT |
1414 | } |
1415 | ||
f357f564 | 1416 | /* register the new slot */ |
023ae9a8 IM |
1417 | do { |
1418 | slot_size = MIN(kvm_max_slot_size, size); | |
1419 | mem = kvm_alloc_slot(kml); | |
e65e5f50 | 1420 | mem->as_id = kml->as_id; |
023ae9a8 IM |
1421 | mem->memory_size = slot_size; |
1422 | mem->start_addr = start_addr; | |
2c20b27e | 1423 | mem->ram_start_offset = ram_start_offset; |
023ae9a8 IM |
1424 | mem->ram = ram; |
1425 | mem->flags = kvm_mem_flags(mr); | |
ea776d15 | 1426 | kvm_slot_init_dirty_bitmap(mem); |
023ae9a8 IM |
1427 | err = kvm_set_user_memory_region(kml, mem, true); |
1428 | if (err) { | |
1429 | fprintf(stderr, "%s: error registering slot: %s\n", __func__, | |
1430 | strerror(-err)); | |
1431 | abort(); | |
1432 | } | |
1433 | start_addr += slot_size; | |
2c20b27e | 1434 | ram_start_offset += slot_size; |
023ae9a8 IM |
1435 | ram += slot_size; |
1436 | size -= slot_size; | |
1437 | } while (size); | |
36adac49 PX |
1438 | |
1439 | out: | |
a2f77862 | 1440 | kvm_slots_unlock(); |
46dbef6a MT |
1441 | } |
1442 | ||
b4420f19 PX |
1443 | static void *kvm_dirty_ring_reaper_thread(void *data) |
1444 | { | |
1445 | KVMState *s = data; | |
1446 | struct KVMDirtyRingReaper *r = &s->reaper; | |
1447 | ||
1448 | rcu_register_thread(); | |
1449 | ||
1450 | trace_kvm_dirty_ring_reaper("init"); | |
1451 | ||
1452 | while (true) { | |
1453 | r->reaper_state = KVM_DIRTY_RING_REAPER_WAIT; | |
1454 | trace_kvm_dirty_ring_reaper("wait"); | |
1455 | /* | |
1456 | * TODO: provide a smarter timeout rather than a constant? | |
1457 | */ | |
1458 | sleep(1); | |
1459 | ||
1460 | trace_kvm_dirty_ring_reaper("wakeup"); | |
1461 | r->reaper_state = KVM_DIRTY_RING_REAPER_REAPING; | |
1462 | ||
1463 | qemu_mutex_lock_iothread(); | |
1464 | kvm_dirty_ring_reap(s); | |
1465 | qemu_mutex_unlock_iothread(); | |
1466 | ||
1467 | r->reaper_iteration++; | |
1468 | } | |
1469 | ||
1470 | trace_kvm_dirty_ring_reaper("exit"); | |
1471 | ||
1472 | rcu_unregister_thread(); | |
1473 | ||
1474 | return NULL; | |
1475 | } | |
1476 | ||
1477 | static int kvm_dirty_ring_reaper_init(KVMState *s) | |
1478 | { | |
1479 | struct KVMDirtyRingReaper *r = &s->reaper; | |
1480 | ||
1481 | qemu_thread_create(&r->reaper_thr, "kvm-reaper", | |
1482 | kvm_dirty_ring_reaper_thread, | |
1483 | s, QEMU_THREAD_JOINABLE); | |
1484 | ||
1485 | return 0; | |
1486 | } | |
1487 | ||
a01672d3 AK |
1488 | static void kvm_region_add(MemoryListener *listener, |
1489 | MemoryRegionSection *section) | |
1490 | { | |
7bbda04c PB |
1491 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
1492 | ||
dfde4e6e | 1493 | memory_region_ref(section->mr); |
7bbda04c | 1494 | kvm_set_phys_mem(kml, section, true); |
a01672d3 AK |
1495 | } |
1496 | ||
1497 | static void kvm_region_del(MemoryListener *listener, | |
1498 | MemoryRegionSection *section) | |
1499 | { | |
7bbda04c PB |
1500 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
1501 | ||
1502 | kvm_set_phys_mem(kml, section, false); | |
dfde4e6e | 1503 | memory_region_unref(section->mr); |
a01672d3 AK |
1504 | } |
1505 | ||
1506 | static void kvm_log_sync(MemoryListener *listener, | |
1507 | MemoryRegionSection *section) | |
7b8f3b78 | 1508 | { |
7bbda04c | 1509 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 | 1510 | |
a2f77862 | 1511 | kvm_slots_lock(); |
e65e5f50 | 1512 | kvm_physical_sync_dirty_bitmap(kml, section); |
a2f77862 | 1513 | kvm_slots_unlock(); |
7b8f3b78 MT |
1514 | } |
1515 | ||
b4420f19 PX |
1516 | static void kvm_log_sync_global(MemoryListener *l) |
1517 | { | |
1518 | KVMMemoryListener *kml = container_of(l, KVMMemoryListener, listener); | |
1519 | KVMState *s = kvm_state; | |
1520 | KVMSlot *mem; | |
1521 | int i; | |
1522 | ||
1523 | /* Flush all kernel dirty addresses into KVMSlot dirty bitmap */ | |
1524 | kvm_dirty_ring_flush(); | |
1525 | ||
1526 | /* | |
1527 | * TODO: make this faster when nr_slots is big while there are | |
1528 | * only a few used slots (small VMs). | |
1529 | */ | |
1530 | kvm_slots_lock(); | |
1531 | for (i = 0; i < s->nr_slots; i++) { | |
1532 | mem = &kml->slots[i]; | |
1533 | if (mem->memory_size && mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { | |
1534 | kvm_slot_sync_dirty_pages(mem); | |
1535 | /* | |
1536 | * This is not needed by KVM_GET_DIRTY_LOG because the | |
1537 | * ioctl will unconditionally overwrite the whole region. | |
1538 | * However kvm dirty ring has no such side effect. | |
1539 | */ | |
1540 | kvm_slot_reset_dirty_pages(mem); | |
1541 | } | |
1542 | } | |
1543 | kvm_slots_unlock(); | |
1544 | } | |
1545 | ||
ff4aa114 PX |
1546 | static void kvm_log_clear(MemoryListener *listener, |
1547 | MemoryRegionSection *section) | |
1548 | { | |
1549 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); | |
1550 | int r; | |
1551 | ||
1552 | r = kvm_physical_log_clear(kml, section); | |
1553 | if (r < 0) { | |
1554 | error_report_once("%s: kvm log clear failed: mr=%s " | |
1555 | "offset=%"HWADDR_PRIx" size=%"PRIx64, __func__, | |
1556 | section->mr->name, section->offset_within_region, | |
1557 | int128_get64(section->size)); | |
1558 | abort(); | |
1559 | } | |
1560 | } | |
1561 | ||
d22b096e AK |
1562 | static void kvm_mem_ioeventfd_add(MemoryListener *listener, |
1563 | MemoryRegionSection *section, | |
1564 | bool match_data, uint64_t data, | |
1565 | EventNotifier *e) | |
1566 | { | |
1567 | int fd = event_notifier_get_fd(e); | |
80a1ea37 AK |
1568 | int r; |
1569 | ||
4b8f1c88 | 1570 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
1571 | data, true, int128_get64(section->size), |
1572 | match_data); | |
80a1ea37 | 1573 | if (r < 0) { |
e346bcbf YK |
1574 | fprintf(stderr, "%s: error adding ioeventfd: %s (%d)\n", |
1575 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1576 | abort(); |
1577 | } | |
1578 | } | |
1579 | ||
d22b096e AK |
1580 | static void kvm_mem_ioeventfd_del(MemoryListener *listener, |
1581 | MemoryRegionSection *section, | |
1582 | bool match_data, uint64_t data, | |
1583 | EventNotifier *e) | |
80a1ea37 | 1584 | { |
d22b096e | 1585 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
1586 | int r; |
1587 | ||
4b8f1c88 | 1588 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
1589 | data, false, int128_get64(section->size), |
1590 | match_data); | |
80a1ea37 | 1591 | if (r < 0) { |
e346bcbf YK |
1592 | fprintf(stderr, "%s: error deleting ioeventfd: %s (%d)\n", |
1593 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1594 | abort(); |
1595 | } | |
1596 | } | |
1597 | ||
d22b096e AK |
1598 | static void kvm_io_ioeventfd_add(MemoryListener *listener, |
1599 | MemoryRegionSection *section, | |
1600 | bool match_data, uint64_t data, | |
1601 | EventNotifier *e) | |
80a1ea37 | 1602 | { |
d22b096e | 1603 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
1604 | int r; |
1605 | ||
44c3f8f7 | 1606 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
1607 | data, true, int128_get64(section->size), |
1608 | match_data); | |
80a1ea37 | 1609 | if (r < 0) { |
e346bcbf YK |
1610 | fprintf(stderr, "%s: error adding ioeventfd: %s (%d)\n", |
1611 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1612 | abort(); |
1613 | } | |
1614 | } | |
1615 | ||
d22b096e AK |
1616 | static void kvm_io_ioeventfd_del(MemoryListener *listener, |
1617 | MemoryRegionSection *section, | |
1618 | bool match_data, uint64_t data, | |
1619 | EventNotifier *e) | |
80a1ea37 AK |
1620 | |
1621 | { | |
d22b096e | 1622 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
1623 | int r; |
1624 | ||
44c3f8f7 | 1625 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
1626 | data, false, int128_get64(section->size), |
1627 | match_data); | |
80a1ea37 | 1628 | if (r < 0) { |
e346bcbf YK |
1629 | fprintf(stderr, "%s: error deleting ioeventfd: %s (%d)\n", |
1630 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1631 | abort(); |
1632 | } | |
1633 | } | |
1634 | ||
38bfe691 PB |
1635 | void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml, |
1636 | AddressSpace *as, int as_id) | |
7bbda04c PB |
1637 | { |
1638 | int i; | |
1639 | ||
1640 | kml->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot)); | |
38bfe691 | 1641 | kml->as_id = as_id; |
7bbda04c PB |
1642 | |
1643 | for (i = 0; i < s->nr_slots; i++) { | |
1644 | kml->slots[i].slot = i; | |
1645 | } | |
1646 | ||
1647 | kml->listener.region_add = kvm_region_add; | |
1648 | kml->listener.region_del = kvm_region_del; | |
1649 | kml->listener.log_start = kvm_log_start; | |
1650 | kml->listener.log_stop = kvm_log_stop; | |
7bbda04c PB |
1651 | kml->listener.priority = 10; |
1652 | ||
b4420f19 PX |
1653 | if (s->kvm_dirty_ring_size) { |
1654 | kml->listener.log_sync_global = kvm_log_sync_global; | |
1655 | } else { | |
1656 | kml->listener.log_sync = kvm_log_sync; | |
1657 | kml->listener.log_clear = kvm_log_clear; | |
1658 | } | |
1659 | ||
7bbda04c | 1660 | memory_listener_register(&kml->listener, as); |
8072aae3 AK |
1661 | |
1662 | for (i = 0; i < s->nr_as; ++i) { | |
1663 | if (!s->as[i].as) { | |
1664 | s->as[i].as = as; | |
1665 | s->as[i].ml = kml; | |
1666 | break; | |
1667 | } | |
1668 | } | |
7bbda04c | 1669 | } |
d22b096e AK |
1670 | |
1671 | static MemoryListener kvm_io_listener = { | |
d22b096e AK |
1672 | .eventfd_add = kvm_io_ioeventfd_add, |
1673 | .eventfd_del = kvm_io_ioeventfd_del, | |
72e22d2f | 1674 | .priority = 10, |
7b8f3b78 MT |
1675 | }; |
1676 | ||
3889c3fa | 1677 | int kvm_set_irq(KVMState *s, int irq, int level) |
84b058d7 JK |
1678 | { |
1679 | struct kvm_irq_level event; | |
1680 | int ret; | |
1681 | ||
7ae26bd4 | 1682 | assert(kvm_async_interrupts_enabled()); |
84b058d7 JK |
1683 | |
1684 | event.level = level; | |
1685 | event.irq = irq; | |
e333cd69 | 1686 | ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event); |
84b058d7 | 1687 | if (ret < 0) { |
3889c3fa | 1688 | perror("kvm_set_irq"); |
84b058d7 JK |
1689 | abort(); |
1690 | } | |
1691 | ||
e333cd69 | 1692 | return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status; |
84b058d7 JK |
1693 | } |
1694 | ||
1695 | #ifdef KVM_CAP_IRQ_ROUTING | |
d3d3bef0 JK |
1696 | typedef struct KVMMSIRoute { |
1697 | struct kvm_irq_routing_entry kroute; | |
1698 | QTAILQ_ENTRY(KVMMSIRoute) entry; | |
1699 | } KVMMSIRoute; | |
1700 | ||
84b058d7 JK |
1701 | static void set_gsi(KVMState *s, unsigned int gsi) |
1702 | { | |
8269fb70 | 1703 | set_bit(gsi, s->used_gsi_bitmap); |
84b058d7 JK |
1704 | } |
1705 | ||
04fa27f5 JK |
1706 | static void clear_gsi(KVMState *s, unsigned int gsi) |
1707 | { | |
8269fb70 | 1708 | clear_bit(gsi, s->used_gsi_bitmap); |
04fa27f5 JK |
1709 | } |
1710 | ||
7b774593 | 1711 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 | 1712 | { |
04fa27f5 | 1713 | int gsi_count, i; |
84b058d7 | 1714 | |
00008418 | 1715 | gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1; |
84b058d7 | 1716 | if (gsi_count > 0) { |
84b058d7 | 1717 | /* Round up so we can search ints using ffs */ |
8269fb70 | 1718 | s->used_gsi_bitmap = bitmap_new(gsi_count); |
4e2e4e63 | 1719 | s->gsi_count = gsi_count; |
84b058d7 JK |
1720 | } |
1721 | ||
1722 | s->irq_routes = g_malloc0(sizeof(*s->irq_routes)); | |
1723 | s->nr_allocated_irq_routes = 0; | |
1724 | ||
50bf31b9 | 1725 | if (!kvm_direct_msi_allowed) { |
4a3adebb JK |
1726 | for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) { |
1727 | QTAILQ_INIT(&s->msi_hashtab[i]); | |
1728 | } | |
04fa27f5 JK |
1729 | } |
1730 | ||
84b058d7 JK |
1731 | kvm_arch_init_irq_routing(s); |
1732 | } | |
1733 | ||
cb925cf9 | 1734 | void kvm_irqchip_commit_routes(KVMState *s) |
e7b20308 JK |
1735 | { |
1736 | int ret; | |
1737 | ||
7005f7f8 PX |
1738 | if (kvm_gsi_direct_mapping()) { |
1739 | return; | |
1740 | } | |
1741 | ||
1742 | if (!kvm_gsi_routing_enabled()) { | |
1743 | return; | |
1744 | } | |
1745 | ||
e7b20308 | 1746 | s->irq_routes->flags = 0; |
54a6c11b | 1747 | trace_kvm_irqchip_commit_routes(); |
e7b20308 JK |
1748 | ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); |
1749 | assert(ret == 0); | |
1750 | } | |
1751 | ||
84b058d7 JK |
1752 | static void kvm_add_routing_entry(KVMState *s, |
1753 | struct kvm_irq_routing_entry *entry) | |
1754 | { | |
1755 | struct kvm_irq_routing_entry *new; | |
1756 | int n, size; | |
1757 | ||
1758 | if (s->irq_routes->nr == s->nr_allocated_irq_routes) { | |
1759 | n = s->nr_allocated_irq_routes * 2; | |
1760 | if (n < 64) { | |
1761 | n = 64; | |
1762 | } | |
1763 | size = sizeof(struct kvm_irq_routing); | |
1764 | size += n * sizeof(*new); | |
1765 | s->irq_routes = g_realloc(s->irq_routes, size); | |
1766 | s->nr_allocated_irq_routes = n; | |
1767 | } | |
1768 | n = s->irq_routes->nr++; | |
1769 | new = &s->irq_routes->entries[n]; | |
0fbc2074 MT |
1770 | |
1771 | *new = *entry; | |
84b058d7 JK |
1772 | |
1773 | set_gsi(s, entry->gsi); | |
1774 | } | |
1775 | ||
cc57407e JK |
1776 | static int kvm_update_routing_entry(KVMState *s, |
1777 | struct kvm_irq_routing_entry *new_entry) | |
1778 | { | |
1779 | struct kvm_irq_routing_entry *entry; | |
1780 | int n; | |
1781 | ||
1782 | for (n = 0; n < s->irq_routes->nr; n++) { | |
1783 | entry = &s->irq_routes->entries[n]; | |
1784 | if (entry->gsi != new_entry->gsi) { | |
1785 | continue; | |
1786 | } | |
1787 | ||
40509f7f MT |
1788 | if(!memcmp(entry, new_entry, sizeof *entry)) { |
1789 | return 0; | |
1790 | } | |
1791 | ||
0fbc2074 | 1792 | *entry = *new_entry; |
cc57407e | 1793 | |
cc57407e JK |
1794 | return 0; |
1795 | } | |
1796 | ||
1797 | return -ESRCH; | |
1798 | } | |
1799 | ||
1df186df | 1800 | void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin) |
84b058d7 | 1801 | { |
0fbc2074 | 1802 | struct kvm_irq_routing_entry e = {}; |
84b058d7 | 1803 | |
4e2e4e63 JK |
1804 | assert(pin < s->gsi_count); |
1805 | ||
84b058d7 JK |
1806 | e.gsi = irq; |
1807 | e.type = KVM_IRQ_ROUTING_IRQCHIP; | |
1808 | e.flags = 0; | |
1809 | e.u.irqchip.irqchip = irqchip; | |
1810 | e.u.irqchip.pin = pin; | |
1811 | kvm_add_routing_entry(s, &e); | |
1812 | } | |
1813 | ||
1e2aa8be | 1814 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
04fa27f5 JK |
1815 | { |
1816 | struct kvm_irq_routing_entry *e; | |
1817 | int i; | |
1818 | ||
76fe21de AK |
1819 | if (kvm_gsi_direct_mapping()) { |
1820 | return; | |
1821 | } | |
1822 | ||
04fa27f5 JK |
1823 | for (i = 0; i < s->irq_routes->nr; i++) { |
1824 | e = &s->irq_routes->entries[i]; | |
1825 | if (e->gsi == virq) { | |
1826 | s->irq_routes->nr--; | |
1827 | *e = s->irq_routes->entries[s->irq_routes->nr]; | |
1828 | } | |
1829 | } | |
1830 | clear_gsi(s, virq); | |
38d87493 | 1831 | kvm_arch_release_virq_post(virq); |
9ba35d0b | 1832 | trace_kvm_irqchip_release_virq(virq); |
04fa27f5 JK |
1833 | } |
1834 | ||
3607715a DG |
1835 | void kvm_irqchip_add_change_notifier(Notifier *n) |
1836 | { | |
1837 | notifier_list_add(&kvm_irqchip_change_notifiers, n); | |
1838 | } | |
1839 | ||
1840 | void kvm_irqchip_remove_change_notifier(Notifier *n) | |
1841 | { | |
1842 | notifier_remove(n); | |
1843 | } | |
1844 | ||
1845 | void kvm_irqchip_change_notify(void) | |
1846 | { | |
1847 | notifier_list_notify(&kvm_irqchip_change_notifiers, NULL); | |
1848 | } | |
1849 | ||
04fa27f5 JK |
1850 | static unsigned int kvm_hash_msi(uint32_t data) |
1851 | { | |
1852 | /* This is optimized for IA32 MSI layout. However, no other arch shall | |
1853 | * repeat the mistake of not providing a direct MSI injection API. */ | |
1854 | return data & 0xff; | |
1855 | } | |
1856 | ||
1857 | static void kvm_flush_dynamic_msi_routes(KVMState *s) | |
1858 | { | |
1859 | KVMMSIRoute *route, *next; | |
1860 | unsigned int hash; | |
1861 | ||
1862 | for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) { | |
1863 | QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) { | |
1864 | kvm_irqchip_release_virq(s, route->kroute.gsi); | |
1865 | QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry); | |
1866 | g_free(route); | |
1867 | } | |
1868 | } | |
1869 | } | |
1870 | ||
1871 | static int kvm_irqchip_get_virq(KVMState *s) | |
1872 | { | |
8269fb70 | 1873 | int next_virq; |
04fa27f5 | 1874 | |
bdf02631 WM |
1875 | /* |
1876 | * PIC and IOAPIC share the first 16 GSI numbers, thus the available | |
1877 | * GSI numbers are more than the number of IRQ route. Allocating a GSI | |
1878 | * number can succeed even though a new route entry cannot be added. | |
1879 | * When this happens, flush dynamic MSI entries to free IRQ route entries. | |
1880 | */ | |
50bf31b9 | 1881 | if (!kvm_direct_msi_allowed && s->irq_routes->nr == s->gsi_count) { |
bdf02631 WM |
1882 | kvm_flush_dynamic_msi_routes(s); |
1883 | } | |
1884 | ||
04fa27f5 | 1885 | /* Return the lowest unused GSI in the bitmap */ |
8269fb70 WY |
1886 | next_virq = find_first_zero_bit(s->used_gsi_bitmap, s->gsi_count); |
1887 | if (next_virq >= s->gsi_count) { | |
1888 | return -ENOSPC; | |
1889 | } else { | |
1890 | return next_virq; | |
04fa27f5 | 1891 | } |
04fa27f5 JK |
1892 | } |
1893 | ||
1894 | static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg) | |
1895 | { | |
1896 | unsigned int hash = kvm_hash_msi(msg.data); | |
1897 | KVMMSIRoute *route; | |
1898 | ||
1899 | QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) { | |
1900 | if (route->kroute.u.msi.address_lo == (uint32_t)msg.address && | |
1901 | route->kroute.u.msi.address_hi == (msg.address >> 32) && | |
d07cc1f1 | 1902 | route->kroute.u.msi.data == le32_to_cpu(msg.data)) { |
04fa27f5 JK |
1903 | return route; |
1904 | } | |
1905 | } | |
1906 | return NULL; | |
1907 | } | |
1908 | ||
1909 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1910 | { | |
4a3adebb | 1911 | struct kvm_msi msi; |
04fa27f5 JK |
1912 | KVMMSIRoute *route; |
1913 | ||
50bf31b9 | 1914 | if (kvm_direct_msi_allowed) { |
4a3adebb JK |
1915 | msi.address_lo = (uint32_t)msg.address; |
1916 | msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1917 | msi.data = le32_to_cpu(msg.data); |
4a3adebb JK |
1918 | msi.flags = 0; |
1919 | memset(msi.pad, 0, sizeof(msi.pad)); | |
1920 | ||
1921 | return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi); | |
1922 | } | |
1923 | ||
04fa27f5 JK |
1924 | route = kvm_lookup_msi_route(s, msg); |
1925 | if (!route) { | |
e7b20308 | 1926 | int virq; |
04fa27f5 JK |
1927 | |
1928 | virq = kvm_irqchip_get_virq(s); | |
1929 | if (virq < 0) { | |
1930 | return virq; | |
1931 | } | |
1932 | ||
0fbc2074 | 1933 | route = g_malloc0(sizeof(KVMMSIRoute)); |
04fa27f5 JK |
1934 | route->kroute.gsi = virq; |
1935 | route->kroute.type = KVM_IRQ_ROUTING_MSI; | |
1936 | route->kroute.flags = 0; | |
1937 | route->kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1938 | route->kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1939 | route->kroute.u.msi.data = le32_to_cpu(msg.data); |
04fa27f5 JK |
1940 | |
1941 | kvm_add_routing_entry(s, &route->kroute); | |
cb925cf9 | 1942 | kvm_irqchip_commit_routes(s); |
04fa27f5 JK |
1943 | |
1944 | QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route, | |
1945 | entry); | |
04fa27f5 JK |
1946 | } |
1947 | ||
1948 | assert(route->kroute.type == KVM_IRQ_ROUTING_MSI); | |
1949 | ||
3889c3fa | 1950 | return kvm_set_irq(s, route->kroute.gsi, 1); |
04fa27f5 JK |
1951 | } |
1952 | ||
d1f6af6a | 1953 | int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) |
92b4e489 | 1954 | { |
0fbc2074 | 1955 | struct kvm_irq_routing_entry kroute = {}; |
92b4e489 | 1956 | int virq; |
d1f6af6a PX |
1957 | MSIMessage msg = {0, 0}; |
1958 | ||
88c725c7 | 1959 | if (pci_available && dev) { |
e1d4fb2d | 1960 | msg = pci_get_msi_message(dev, vector); |
d1f6af6a | 1961 | } |
92b4e489 | 1962 | |
76fe21de | 1963 | if (kvm_gsi_direct_mapping()) { |
1850b6b7 | 1964 | return kvm_arch_msi_data_to_gsi(msg.data); |
76fe21de AK |
1965 | } |
1966 | ||
f3e1bed8 | 1967 | if (!kvm_gsi_routing_enabled()) { |
92b4e489 JK |
1968 | return -ENOSYS; |
1969 | } | |
1970 | ||
1971 | virq = kvm_irqchip_get_virq(s); | |
1972 | if (virq < 0) { | |
1973 | return virq; | |
1974 | } | |
1975 | ||
1976 | kroute.gsi = virq; | |
1977 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1978 | kroute.flags = 0; | |
1979 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1980 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1981 | kroute.u.msi.data = le32_to_cpu(msg.data); |
88c725c7 | 1982 | if (pci_available && kvm_msi_devid_required()) { |
767a554a PF |
1983 | kroute.flags = KVM_MSI_VALID_DEVID; |
1984 | kroute.u.msi.devid = pci_requester_id(dev); | |
1985 | } | |
dc9f06ca | 1986 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { |
9e03a040 FB |
1987 | kvm_irqchip_release_virq(s, virq); |
1988 | return -EINVAL; | |
1989 | } | |
92b4e489 | 1990 | |
9ba35d0b PX |
1991 | trace_kvm_irqchip_add_msi_route(dev ? dev->name : (char *)"N/A", |
1992 | vector, virq); | |
54a6c11b | 1993 | |
92b4e489 | 1994 | kvm_add_routing_entry(s, &kroute); |
38d87493 | 1995 | kvm_arch_add_msi_route_post(&kroute, vector, dev); |
cb925cf9 | 1996 | kvm_irqchip_commit_routes(s); |
92b4e489 JK |
1997 | |
1998 | return virq; | |
1999 | } | |
2000 | ||
dc9f06ca PF |
2001 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg, |
2002 | PCIDevice *dev) | |
cc57407e | 2003 | { |
0fbc2074 | 2004 | struct kvm_irq_routing_entry kroute = {}; |
cc57407e | 2005 | |
76fe21de AK |
2006 | if (kvm_gsi_direct_mapping()) { |
2007 | return 0; | |
2008 | } | |
2009 | ||
cc57407e JK |
2010 | if (!kvm_irqchip_in_kernel()) { |
2011 | return -ENOSYS; | |
2012 | } | |
2013 | ||
2014 | kroute.gsi = virq; | |
2015 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
2016 | kroute.flags = 0; | |
2017 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
2018 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 2019 | kroute.u.msi.data = le32_to_cpu(msg.data); |
88c725c7 | 2020 | if (pci_available && kvm_msi_devid_required()) { |
767a554a PF |
2021 | kroute.flags = KVM_MSI_VALID_DEVID; |
2022 | kroute.u.msi.devid = pci_requester_id(dev); | |
2023 | } | |
dc9f06ca | 2024 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { |
9e03a040 FB |
2025 | return -EINVAL; |
2026 | } | |
cc57407e | 2027 | |
54a6c11b PX |
2028 | trace_kvm_irqchip_update_msi_route(virq); |
2029 | ||
cc57407e JK |
2030 | return kvm_update_routing_entry(s, &kroute); |
2031 | } | |
2032 | ||
ff66ba87 PX |
2033 | static int kvm_irqchip_assign_irqfd(KVMState *s, EventNotifier *event, |
2034 | EventNotifier *resample, int virq, | |
ca916d37 | 2035 | bool assign) |
39853bbc | 2036 | { |
ff66ba87 PX |
2037 | int fd = event_notifier_get_fd(event); |
2038 | int rfd = resample ? event_notifier_get_fd(resample) : -1; | |
2039 | ||
39853bbc JK |
2040 | struct kvm_irqfd irqfd = { |
2041 | .fd = fd, | |
2042 | .gsi = virq, | |
2043 | .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN, | |
2044 | }; | |
2045 | ||
ca916d37 | 2046 | if (rfd != -1) { |
c82d9d43 PX |
2047 | assert(assign); |
2048 | if (kvm_irqchip_is_split()) { | |
2049 | /* | |
2050 | * When the slow irqchip (e.g. IOAPIC) is in the | |
2051 | * userspace, KVM kernel resamplefd will not work because | |
2052 | * the EOI of the interrupt will be delivered to userspace | |
2053 | * instead, so the KVM kernel resamplefd kick will be | |
2054 | * skipped. The userspace here mimics what the kernel | |
2055 | * provides with resamplefd, remember the resamplefd and | |
2056 | * kick it when we receive EOI of this IRQ. | |
2057 | * | |
2058 | * This is hackery because IOAPIC is mostly bypassed | |
2059 | * (except EOI broadcasts) when irqfd is used. However | |
2060 | * this can bring much performance back for split irqchip | |
2061 | * with INTx IRQs (for VFIO, this gives 93% perf of the | |
2062 | * full fast path, which is 46% perf boost comparing to | |
2063 | * the INTx slow path). | |
2064 | */ | |
2065 | kvm_resample_fd_insert(virq, resample); | |
2066 | } else { | |
2067 | irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE; | |
2068 | irqfd.resamplefd = rfd; | |
2069 | } | |
2070 | } else if (!assign) { | |
2071 | if (kvm_irqchip_is_split()) { | |
2072 | kvm_resample_fd_remove(virq); | |
2073 | } | |
ca916d37 VM |
2074 | } |
2075 | ||
cc7e0ddf | 2076 | if (!kvm_irqfds_enabled()) { |
39853bbc JK |
2077 | return -ENOSYS; |
2078 | } | |
2079 | ||
2080 | return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd); | |
2081 | } | |
2082 | ||
d426d9fb CH |
2083 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
2084 | { | |
e9af2fef | 2085 | struct kvm_irq_routing_entry kroute = {}; |
d426d9fb CH |
2086 | int virq; |
2087 | ||
2088 | if (!kvm_gsi_routing_enabled()) { | |
2089 | return -ENOSYS; | |
2090 | } | |
2091 | ||
2092 | virq = kvm_irqchip_get_virq(s); | |
2093 | if (virq < 0) { | |
2094 | return virq; | |
2095 | } | |
2096 | ||
2097 | kroute.gsi = virq; | |
2098 | kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER; | |
2099 | kroute.flags = 0; | |
2100 | kroute.u.adapter.summary_addr = adapter->summary_addr; | |
2101 | kroute.u.adapter.ind_addr = adapter->ind_addr; | |
2102 | kroute.u.adapter.summary_offset = adapter->summary_offset; | |
2103 | kroute.u.adapter.ind_offset = adapter->ind_offset; | |
2104 | kroute.u.adapter.adapter_id = adapter->adapter_id; | |
2105 | ||
2106 | kvm_add_routing_entry(s, &kroute); | |
d426d9fb CH |
2107 | |
2108 | return virq; | |
2109 | } | |
2110 | ||
977a8d9c AS |
2111 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) |
2112 | { | |
2113 | struct kvm_irq_routing_entry kroute = {}; | |
2114 | int virq; | |
2115 | ||
2116 | if (!kvm_gsi_routing_enabled()) { | |
2117 | return -ENOSYS; | |
2118 | } | |
2119 | if (!kvm_check_extension(s, KVM_CAP_HYPERV_SYNIC)) { | |
2120 | return -ENOSYS; | |
2121 | } | |
2122 | virq = kvm_irqchip_get_virq(s); | |
2123 | if (virq < 0) { | |
2124 | return virq; | |
2125 | } | |
2126 | ||
2127 | kroute.gsi = virq; | |
2128 | kroute.type = KVM_IRQ_ROUTING_HV_SINT; | |
2129 | kroute.flags = 0; | |
2130 | kroute.u.hv_sint.vcpu = vcpu; | |
2131 | kroute.u.hv_sint.sint = sint; | |
2132 | ||
2133 | kvm_add_routing_entry(s, &kroute); | |
2134 | kvm_irqchip_commit_routes(s); | |
2135 | ||
2136 | return virq; | |
2137 | } | |
2138 | ||
84b058d7 JK |
2139 | #else /* !KVM_CAP_IRQ_ROUTING */ |
2140 | ||
7b774593 | 2141 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 JK |
2142 | { |
2143 | } | |
04fa27f5 | 2144 | |
d3d3bef0 JK |
2145 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
2146 | { | |
2147 | } | |
2148 | ||
04fa27f5 JK |
2149 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) |
2150 | { | |
2151 | abort(); | |
2152 | } | |
92b4e489 | 2153 | |
d1f6af6a | 2154 | int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) |
92b4e489 | 2155 | { |
df410675 | 2156 | return -ENOSYS; |
92b4e489 | 2157 | } |
39853bbc | 2158 | |
d426d9fb CH |
2159 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
2160 | { | |
2161 | return -ENOSYS; | |
2162 | } | |
2163 | ||
977a8d9c AS |
2164 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) |
2165 | { | |
2166 | return -ENOSYS; | |
2167 | } | |
2168 | ||
ff66ba87 PX |
2169 | static int kvm_irqchip_assign_irqfd(KVMState *s, EventNotifier *event, |
2170 | EventNotifier *resample, int virq, | |
2171 | bool assign) | |
39853bbc JK |
2172 | { |
2173 | abort(); | |
2174 | } | |
dabe3143 MT |
2175 | |
2176 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) | |
2177 | { | |
2178 | return -ENOSYS; | |
2179 | } | |
84b058d7 JK |
2180 | #endif /* !KVM_CAP_IRQ_ROUTING */ |
2181 | ||
1c9b71a7 EA |
2182 | int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, |
2183 | EventNotifier *rn, int virq) | |
39853bbc | 2184 | { |
ff66ba87 | 2185 | return kvm_irqchip_assign_irqfd(s, n, rn, virq, true); |
39853bbc JK |
2186 | } |
2187 | ||
1c9b71a7 EA |
2188 | int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, |
2189 | int virq) | |
15b2bd18 | 2190 | { |
ff66ba87 | 2191 | return kvm_irqchip_assign_irqfd(s, n, NULL, virq, false); |
15b2bd18 PB |
2192 | } |
2193 | ||
197e3524 EA |
2194 | int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, |
2195 | EventNotifier *rn, qemu_irq irq) | |
2196 | { | |
2197 | gpointer key, gsi; | |
2198 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
2199 | ||
2200 | if (!found) { | |
2201 | return -ENXIO; | |
2202 | } | |
2203 | return kvm_irqchip_add_irqfd_notifier_gsi(s, n, rn, GPOINTER_TO_INT(gsi)); | |
2204 | } | |
2205 | ||
2206 | int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, | |
2207 | qemu_irq irq) | |
2208 | { | |
2209 | gpointer key, gsi; | |
2210 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
2211 | ||
2212 | if (!found) { | |
2213 | return -ENXIO; | |
2214 | } | |
2215 | return kvm_irqchip_remove_irqfd_notifier_gsi(s, n, GPOINTER_TO_INT(gsi)); | |
2216 | } | |
2217 | ||
2218 | void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi) | |
2219 | { | |
2220 | g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi)); | |
2221 | } | |
2222 | ||
4376c40d | 2223 | static void kvm_irqchip_create(KVMState *s) |
84b058d7 | 2224 | { |
84b058d7 JK |
2225 | int ret; |
2226 | ||
d1972be1 | 2227 | assert(s->kernel_irqchip_split != ON_OFF_AUTO_AUTO); |
8db4936b PB |
2228 | if (kvm_check_extension(s, KVM_CAP_IRQCHIP)) { |
2229 | ; | |
2230 | } else if (kvm_check_extension(s, KVM_CAP_S390_IRQCHIP)) { | |
2231 | ret = kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0); | |
2232 | if (ret < 0) { | |
2233 | fprintf(stderr, "Enable kernel irqchip failed: %s\n", strerror(-ret)); | |
2234 | exit(1); | |
2235 | } | |
2236 | } else { | |
2237 | return; | |
84b058d7 JK |
2238 | } |
2239 | ||
d6032e06 CD |
2240 | /* First probe and see if there's a arch-specific hook to create the |
2241 | * in-kernel irqchip for us */ | |
4376c40d | 2242 | ret = kvm_arch_irqchip_create(s); |
8db4936b | 2243 | if (ret == 0) { |
d1972be1 | 2244 | if (s->kernel_irqchip_split == ON_OFF_AUTO_ON) { |
15eafc2e PB |
2245 | perror("Split IRQ chip mode not supported."); |
2246 | exit(1); | |
2247 | } else { | |
2248 | ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); | |
2249 | } | |
8db4936b PB |
2250 | } |
2251 | if (ret < 0) { | |
2252 | fprintf(stderr, "Create kernel irqchip failed: %s\n", strerror(-ret)); | |
2253 | exit(1); | |
84b058d7 JK |
2254 | } |
2255 | ||
3d4b2649 | 2256 | kvm_kernel_irqchip = true; |
7ae26bd4 PM |
2257 | /* If we have an in-kernel IRQ chip then we must have asynchronous |
2258 | * interrupt delivery (though the reverse is not necessarily true) | |
2259 | */ | |
2260 | kvm_async_interrupts_allowed = true; | |
215e79c0 | 2261 | kvm_halt_in_kernel_allowed = true; |
84b058d7 JK |
2262 | |
2263 | kvm_init_irq_routing(s); | |
2264 | ||
197e3524 | 2265 | s->gsimap = g_hash_table_new(g_direct_hash, g_direct_equal); |
84b058d7 JK |
2266 | } |
2267 | ||
670436ce AJ |
2268 | /* Find number of supported CPUs using the recommended |
2269 | * procedure from the kernel API documentation to cope with | |
2270 | * older kernels that may be missing capabilities. | |
2271 | */ | |
2272 | static int kvm_recommended_vcpus(KVMState *s) | |
3ed444e9 | 2273 | { |
11748ba7 | 2274 | int ret = kvm_vm_check_extension(s, KVM_CAP_NR_VCPUS); |
670436ce AJ |
2275 | return (ret) ? ret : 4; |
2276 | } | |
3ed444e9 | 2277 | |
670436ce AJ |
2278 | static int kvm_max_vcpus(KVMState *s) |
2279 | { | |
2280 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS); | |
2281 | return (ret) ? ret : kvm_recommended_vcpus(s); | |
3ed444e9 DH |
2282 | } |
2283 | ||
f31e3266 GK |
2284 | static int kvm_max_vcpu_id(KVMState *s) |
2285 | { | |
2286 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPU_ID); | |
2287 | return (ret) ? ret : kvm_max_vcpus(s); | |
2288 | } | |
2289 | ||
41264b38 GK |
2290 | bool kvm_vcpu_id_is_valid(int vcpu_id) |
2291 | { | |
4f7f5893 | 2292 | KVMState *s = KVM_STATE(current_accel()); |
f31e3266 | 2293 | return vcpu_id >= 0 && vcpu_id < kvm_max_vcpu_id(s); |
41264b38 GK |
2294 | } |
2295 | ||
f6a1ef64 | 2296 | static int kvm_init(MachineState *ms) |
05330448 | 2297 | { |
f6a1ef64 | 2298 | MachineClass *mc = MACHINE_GET_CLASS(ms); |
168ccc11 JK |
2299 | static const char upgrade_note[] = |
2300 | "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" | |
2301 | "(see http://sourceforge.net/projects/kvm).\n"; | |
670436ce AJ |
2302 | struct { |
2303 | const char *name; | |
2304 | int num; | |
2305 | } num_cpus[] = { | |
5cc8767d LX |
2306 | { "SMP", ms->smp.cpus }, |
2307 | { "hotpluggable", ms->smp.max_cpus }, | |
670436ce AJ |
2308 | { NULL, } |
2309 | }, *nc = num_cpus; | |
2310 | int soft_vcpus_limit, hard_vcpus_limit; | |
05330448 | 2311 | KVMState *s; |
94a8d39a | 2312 | const KVMCapabilityInfo *missing_cap; |
05330448 | 2313 | int ret; |
7bbda04c | 2314 | int type = 0; |
494cd11d | 2315 | uint64_t dirty_log_manual_caps; |
05330448 | 2316 | |
a2f77862 PX |
2317 | qemu_mutex_init(&kml_slots_lock); |
2318 | ||
fc02086b | 2319 | s = KVM_STATE(ms->accelerator); |
05330448 | 2320 | |
3145fcb6 DG |
2321 | /* |
2322 | * On systems where the kernel can support different base page | |
2323 | * sizes, host page size may be different from TARGET_PAGE_SIZE, | |
2324 | * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum | |
2325 | * page size for the system though. | |
2326 | */ | |
038adc2f | 2327 | assert(TARGET_PAGE_SIZE <= qemu_real_host_page_size); |
3145fcb6 | 2328 | |
aed6efb9 JH |
2329 | s->sigmask_len = 8; |
2330 | ||
e22a25c9 | 2331 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
72cf2d4f | 2332 | QTAILQ_INIT(&s->kvm_sw_breakpoints); |
e22a25c9 | 2333 | #endif |
4c055ab5 | 2334 | QLIST_INIT(&s->kvm_parked_vcpus); |
448058aa | 2335 | s->fd = qemu_open_old("/dev/kvm", O_RDWR); |
05330448 AL |
2336 | if (s->fd == -1) { |
2337 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); | |
2338 | ret = -errno; | |
2339 | goto err; | |
2340 | } | |
2341 | ||
2342 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); | |
2343 | if (ret < KVM_API_VERSION) { | |
0e1dac6c | 2344 | if (ret >= 0) { |
05330448 | 2345 | ret = -EINVAL; |
a426e122 | 2346 | } |
05330448 AL |
2347 | fprintf(stderr, "kvm version too old\n"); |
2348 | goto err; | |
2349 | } | |
2350 | ||
2351 | if (ret > KVM_API_VERSION) { | |
2352 | ret = -EINVAL; | |
2353 | fprintf(stderr, "kvm version not supported\n"); | |
2354 | goto err; | |
2355 | } | |
2356 | ||
cf0f7cf9 | 2357 | kvm_immediate_exit = kvm_check_extension(s, KVM_CAP_IMMEDIATE_EXIT); |
fb541ca5 AW |
2358 | s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS); |
2359 | ||
2360 | /* If unspecified, use the default value */ | |
2361 | if (!s->nr_slots) { | |
2362 | s->nr_slots = 32; | |
2363 | } | |
2364 | ||
8072aae3 AK |
2365 | s->nr_as = kvm_check_extension(s, KVM_CAP_MULTI_ADDRESS_SPACE); |
2366 | if (s->nr_as <= 1) { | |
2367 | s->nr_as = 1; | |
2368 | } | |
2369 | s->as = g_new0(struct KVMAs, s->nr_as); | |
2370 | ||
f2ce39b4 PB |
2371 | if (object_property_find(OBJECT(current_machine), "kvm-type")) { |
2372 | g_autofree char *kvm_type = object_property_get_str(OBJECT(current_machine), | |
2373 | "kvm-type", | |
2374 | &error_abort); | |
dc0ca80e | 2375 | type = mc->kvm_type(ms, kvm_type); |
516fc0a0 AJ |
2376 | } else if (mc->kvm_type) { |
2377 | type = mc->kvm_type(ms, NULL); | |
135a129a AK |
2378 | } |
2379 | ||
94ccff13 | 2380 | do { |
135a129a | 2381 | ret = kvm_ioctl(s, KVM_CREATE_VM, type); |
94ccff13 TK |
2382 | } while (ret == -EINTR); |
2383 | ||
2384 | if (ret < 0) { | |
521f438e | 2385 | fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret, |
94ccff13 TK |
2386 | strerror(-ret)); |
2387 | ||
0104dcac | 2388 | #ifdef TARGET_S390X |
2c80e996 CH |
2389 | if (ret == -EINVAL) { |
2390 | fprintf(stderr, | |
2391 | "Host kernel setup problem detected. Please verify:\n"); | |
2392 | fprintf(stderr, "- for kernels supporting the switch_amode or" | |
2393 | " user_mode parameters, whether\n"); | |
2394 | fprintf(stderr, | |
2395 | " user space is running in primary address space\n"); | |
2396 | fprintf(stderr, | |
2397 | "- for kernels supporting the vm.allocate_pgste sysctl, " | |
2398 | "whether it is enabled\n"); | |
2399 | } | |
0104dcac | 2400 | #endif |
05330448 | 2401 | goto err; |
0104dcac | 2402 | } |
05330448 | 2403 | |
94ccff13 | 2404 | s->vmfd = ret; |
11748ba7 GK |
2405 | |
2406 | /* check the vcpu limits */ | |
2407 | soft_vcpus_limit = kvm_recommended_vcpus(s); | |
2408 | hard_vcpus_limit = kvm_max_vcpus(s); | |
2409 | ||
2410 | while (nc->name) { | |
2411 | if (nc->num > soft_vcpus_limit) { | |
2412 | warn_report("Number of %s cpus requested (%d) exceeds " | |
2413 | "the recommended cpus supported by KVM (%d)", | |
2414 | nc->name, nc->num, soft_vcpus_limit); | |
2415 | ||
2416 | if (nc->num > hard_vcpus_limit) { | |
2417 | fprintf(stderr, "Number of %s cpus requested (%d) exceeds " | |
2418 | "the maximum cpus supported by KVM (%d)\n", | |
2419 | nc->name, nc->num, hard_vcpus_limit); | |
2420 | exit(1); | |
2421 | } | |
2422 | } | |
2423 | nc++; | |
2424 | } | |
2425 | ||
94a8d39a JK |
2426 | missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); |
2427 | if (!missing_cap) { | |
2428 | missing_cap = | |
2429 | kvm_check_extension_list(s, kvm_arch_required_capabilities); | |
05330448 | 2430 | } |
94a8d39a | 2431 | if (missing_cap) { |
ad7b8b33 | 2432 | ret = -EINVAL; |
94a8d39a JK |
2433 | fprintf(stderr, "kvm does not support %s\n%s", |
2434 | missing_cap->name, upgrade_note); | |
d85dc283 AL |
2435 | goto err; |
2436 | } | |
2437 | ||
ad7b8b33 | 2438 | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
e6d34aee PH |
2439 | s->coalesced_pio = s->coalesced_mmio && |
2440 | kvm_check_extension(s, KVM_CAP_COALESCED_PIO); | |
f65ed4c1 | 2441 | |
b4420f19 PX |
2442 | /* |
2443 | * Enable KVM dirty ring if supported, otherwise fall back to | |
2444 | * dirty logging mode | |
2445 | */ | |
2446 | if (s->kvm_dirty_ring_size > 0) { | |
2447 | uint64_t ring_bytes; | |
2448 | ||
2449 | ring_bytes = s->kvm_dirty_ring_size * sizeof(struct kvm_dirty_gfn); | |
2450 | ||
2451 | /* Read the max supported pages */ | |
2452 | ret = kvm_vm_check_extension(s, KVM_CAP_DIRTY_LOG_RING); | |
2453 | if (ret > 0) { | |
2454 | if (ring_bytes > ret) { | |
2455 | error_report("KVM dirty ring size %" PRIu32 " too big " | |
2456 | "(maximum is %ld). Please use a smaller value.", | |
2457 | s->kvm_dirty_ring_size, | |
2458 | (long)ret / sizeof(struct kvm_dirty_gfn)); | |
2459 | ret = -EINVAL; | |
2460 | goto err; | |
2461 | } | |
2462 | ||
2463 | ret = kvm_vm_enable_cap(s, KVM_CAP_DIRTY_LOG_RING, 0, ring_bytes); | |
2464 | if (ret) { | |
2465 | error_report("Enabling of KVM dirty ring failed: %s. " | |
2466 | "Suggested mininum value is 1024.", strerror(-ret)); | |
2467 | goto err; | |
2468 | } | |
2469 | ||
2470 | s->kvm_dirty_ring_bytes = ring_bytes; | |
2471 | } else { | |
2472 | warn_report("KVM dirty ring not available, using bitmap method"); | |
2473 | s->kvm_dirty_ring_size = 0; | |
2474 | } | |
2475 | } | |
2476 | ||
a81a5926 PX |
2477 | /* |
2478 | * KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 is not needed when dirty ring is | |
2479 | * enabled. More importantly, KVM_DIRTY_LOG_INITIALLY_SET will assume no | |
2480 | * page is wr-protected initially, which is against how kvm dirty ring is | |
2481 | * usage - kvm dirty ring requires all pages are wr-protected at the very | |
2482 | * beginning. Enabling this feature for dirty ring causes data corruption. | |
b4420f19 PX |
2483 | * |
2484 | * TODO: Without KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 and kvm clear dirty log, | |
2485 | * we may expect a higher stall time when starting the migration. In the | |
2486 | * future we can enable KVM_CLEAR_DIRTY_LOG to work with dirty ring too: | |
2487 | * instead of clearing dirty bit, it can be a way to explicitly wr-protect | |
2488 | * guest pages. | |
a81a5926 PX |
2489 | */ |
2490 | if (!s->kvm_dirty_ring_size) { | |
2491 | dirty_log_manual_caps = | |
2492 | kvm_check_extension(s, KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2); | |
2493 | dirty_log_manual_caps &= (KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE | | |
2494 | KVM_DIRTY_LOG_INITIALLY_SET); | |
2495 | s->manual_dirty_log_protect = dirty_log_manual_caps; | |
2496 | if (dirty_log_manual_caps) { | |
2497 | ret = kvm_vm_enable_cap(s, KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2, 0, | |
2498 | dirty_log_manual_caps); | |
2499 | if (ret) { | |
2500 | warn_report("Trying to enable capability %"PRIu64" of " | |
2501 | "KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 but failed. " | |
2502 | "Falling back to the legacy mode. ", | |
2503 | dirty_log_manual_caps); | |
2504 | s->manual_dirty_log_protect = 0; | |
2505 | } | |
ff4aa114 PX |
2506 | } |
2507 | } | |
2508 | ||
a0fb002c JK |
2509 | #ifdef KVM_CAP_VCPU_EVENTS |
2510 | s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); | |
2511 | #endif | |
2512 | ||
b0b1d690 JK |
2513 | s->robust_singlestep = |
2514 | kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); | |
b0b1d690 | 2515 | |
ff44f1a3 JK |
2516 | #ifdef KVM_CAP_DEBUGREGS |
2517 | s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); | |
2518 | #endif | |
2519 | ||
ebbfef2f LA |
2520 | s->max_nested_state_len = kvm_check_extension(s, KVM_CAP_NESTED_STATE); |
2521 | ||
d3d3bef0 | 2522 | #ifdef KVM_CAP_IRQ_ROUTING |
50bf31b9 | 2523 | kvm_direct_msi_allowed = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0); |
d3d3bef0 | 2524 | #endif |
4a3adebb | 2525 | |
3ab73842 JK |
2526 | s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3); |
2527 | ||
e333cd69 | 2528 | s->irq_set_ioctl = KVM_IRQ_LINE; |
8732fbd2 | 2529 | if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) { |
e333cd69 | 2530 | s->irq_set_ioctl = KVM_IRQ_LINE_STATUS; |
8732fbd2 PM |
2531 | } |
2532 | ||
df9c8b75 JJ |
2533 | kvm_readonly_mem_allowed = |
2534 | (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0); | |
df9c8b75 | 2535 | |
69e03ae6 NN |
2536 | kvm_eventfds_allowed = |
2537 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0); | |
2538 | ||
f41389ae EA |
2539 | kvm_irqfds_allowed = |
2540 | (kvm_check_extension(s, KVM_CAP_IRQFD) > 0); | |
2541 | ||
2542 | kvm_resamplefds_allowed = | |
2543 | (kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0); | |
2544 | ||
d0a073a1 DD |
2545 | kvm_vm_attributes_allowed = |
2546 | (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0); | |
2547 | ||
35108223 JW |
2548 | kvm_ioeventfd_any_length_allowed = |
2549 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD_ANY_LENGTH) > 0); | |
2550 | ||
d870cfde GA |
2551 | kvm_state = s; |
2552 | ||
b16565b3 | 2553 | ret = kvm_arch_init(ms, s); |
a426e122 | 2554 | if (ret < 0) { |
05330448 | 2555 | goto err; |
a426e122 | 2556 | } |
05330448 | 2557 | |
d1972be1 XL |
2558 | if (s->kernel_irqchip_split == ON_OFF_AUTO_AUTO) { |
2559 | s->kernel_irqchip_split = mc->default_kernel_irqchip_split ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF; | |
2560 | } | |
2561 | ||
6b552b9b DG |
2562 | qemu_register_reset(kvm_unpoison_all, NULL); |
2563 | ||
11bc4a13 | 2564 | if (s->kernel_irqchip_allowed) { |
4376c40d | 2565 | kvm_irqchip_create(s); |
84b058d7 JK |
2566 | } |
2567 | ||
8c56c1a5 PF |
2568 | if (kvm_eventfds_allowed) { |
2569 | s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add; | |
2570 | s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del; | |
2571 | } | |
e6d34aee PH |
2572 | s->memory_listener.listener.coalesced_io_add = kvm_coalesce_mmio_region; |
2573 | s->memory_listener.listener.coalesced_io_del = kvm_uncoalesce_mmio_region; | |
7bbda04c PB |
2574 | |
2575 | kvm_memory_listener_register(s, &s->memory_listener, | |
38bfe691 | 2576 | &address_space_memory, 0); |
f9b49088 EA |
2577 | if (kvm_eventfds_allowed) { |
2578 | memory_listener_register(&kvm_io_listener, | |
2579 | &address_space_io); | |
2580 | } | |
e6d34aee PH |
2581 | memory_listener_register(&kvm_coalesced_pio_listener, |
2582 | &address_space_io); | |
05330448 | 2583 | |
d2f2b8a7 SH |
2584 | s->many_ioeventfds = kvm_check_many_ioeventfds(); |
2585 | ||
62dd4eda | 2586 | s->sync_mmu = !!kvm_vm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); |
f5948942 | 2587 | if (!s->sync_mmu) { |
956b109f DH |
2588 | ret = ram_block_discard_disable(true); |
2589 | assert(!ret); | |
f5948942 | 2590 | } |
b4420f19 PX |
2591 | |
2592 | if (s->kvm_dirty_ring_size) { | |
2593 | ret = kvm_dirty_ring_reaper_init(s); | |
2594 | if (ret) { | |
2595 | goto err; | |
2596 | } | |
2597 | } | |
2598 | ||
05330448 AL |
2599 | return 0; |
2600 | ||
2601 | err: | |
0e1dac6c | 2602 | assert(ret < 0); |
6d1cc321 SW |
2603 | if (s->vmfd >= 0) { |
2604 | close(s->vmfd); | |
2605 | } | |
2606 | if (s->fd != -1) { | |
2607 | close(s->fd); | |
05330448 | 2608 | } |
7bbda04c | 2609 | g_free(s->memory_listener.slots); |
05330448 AL |
2610 | |
2611 | return ret; | |
2612 | } | |
2613 | ||
aed6efb9 JH |
2614 | void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len) |
2615 | { | |
2616 | s->sigmask_len = sigmask_len; | |
2617 | } | |
2618 | ||
4c663752 PB |
2619 | static void kvm_handle_io(uint16_t port, MemTxAttrs attrs, void *data, int direction, |
2620 | int size, uint32_t count) | |
05330448 AL |
2621 | { |
2622 | int i; | |
2623 | uint8_t *ptr = data; | |
2624 | ||
2625 | for (i = 0; i < count; i++) { | |
4c663752 | 2626 | address_space_rw(&address_space_io, port, attrs, |
5c9eb028 | 2627 | ptr, size, |
354678c5 | 2628 | direction == KVM_EXIT_IO_OUT); |
05330448 AL |
2629 | ptr += size; |
2630 | } | |
05330448 AL |
2631 | } |
2632 | ||
5326ab55 | 2633 | static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run) |
7c80eef8 | 2634 | { |
977c7b6d RK |
2635 | fprintf(stderr, "KVM internal error. Suberror: %d\n", |
2636 | run->internal.suberror); | |
2637 | ||
7c80eef8 MT |
2638 | if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) { |
2639 | int i; | |
2640 | ||
7c80eef8 | 2641 | for (i = 0; i < run->internal.ndata; ++i) { |
56567da3 | 2642 | fprintf(stderr, "extra data[%d]: 0x%016"PRIx64"\n", |
7c80eef8 MT |
2643 | i, (uint64_t)run->internal.data[i]); |
2644 | } | |
2645 | } | |
7c80eef8 MT |
2646 | if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) { |
2647 | fprintf(stderr, "emulation failure\n"); | |
20d695a9 | 2648 | if (!kvm_arch_stop_on_emulation_error(cpu)) { |
90c84c56 | 2649 | cpu_dump_state(cpu, stderr, CPU_DUMP_CODE); |
d73cd8f4 | 2650 | return EXCP_INTERRUPT; |
a426e122 | 2651 | } |
7c80eef8 MT |
2652 | } |
2653 | /* FIXME: Should trigger a qmp message to let management know | |
2654 | * something went wrong. | |
2655 | */ | |
73aaec4a | 2656 | return -1; |
7c80eef8 | 2657 | } |
7c80eef8 | 2658 | |
62a2744c | 2659 | void kvm_flush_coalesced_mmio_buffer(void) |
f65ed4c1 | 2660 | { |
f65ed4c1 | 2661 | KVMState *s = kvm_state; |
1cae88b9 AK |
2662 | |
2663 | if (s->coalesced_flush_in_progress) { | |
2664 | return; | |
2665 | } | |
2666 | ||
2667 | s->coalesced_flush_in_progress = true; | |
2668 | ||
62a2744c SY |
2669 | if (s->coalesced_mmio_ring) { |
2670 | struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring; | |
f65ed4c1 AL |
2671 | while (ring->first != ring->last) { |
2672 | struct kvm_coalesced_mmio *ent; | |
2673 | ||
2674 | ent = &ring->coalesced_mmio[ring->first]; | |
2675 | ||
e6d34aee | 2676 | if (ent->pio == 1) { |
19f70347 PM |
2677 | address_space_write(&address_space_io, ent->phys_addr, |
2678 | MEMTXATTRS_UNSPECIFIED, ent->data, | |
2679 | ent->len); | |
e6d34aee PH |
2680 | } else { |
2681 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); | |
2682 | } | |
85199474 | 2683 | smp_wmb(); |
f65ed4c1 AL |
2684 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; |
2685 | } | |
2686 | } | |
1cae88b9 AK |
2687 | |
2688 | s->coalesced_flush_in_progress = false; | |
f65ed4c1 AL |
2689 | } |
2690 | ||
92a5199b TL |
2691 | bool kvm_cpu_check_are_resettable(void) |
2692 | { | |
2693 | return kvm_arch_cpu_check_are_resettable(); | |
2694 | } | |
2695 | ||
14e6fe12 | 2696 | static void do_kvm_cpu_synchronize_state(CPUState *cpu, run_on_cpu_data arg) |
4c0960c0 | 2697 | { |
99f31832 | 2698 | if (!cpu->vcpu_dirty) { |
20d695a9 | 2699 | kvm_arch_get_registers(cpu); |
99f31832 | 2700 | cpu->vcpu_dirty = true; |
4c0960c0 AK |
2701 | } |
2702 | } | |
2703 | ||
dd1750d7 | 2704 | void kvm_cpu_synchronize_state(CPUState *cpu) |
2705d56a | 2705 | { |
99f31832 | 2706 | if (!cpu->vcpu_dirty) { |
14e6fe12 | 2707 | run_on_cpu(cpu, do_kvm_cpu_synchronize_state, RUN_ON_CPU_NULL); |
a426e122 | 2708 | } |
2705d56a JK |
2709 | } |
2710 | ||
14e6fe12 | 2711 | static void do_kvm_cpu_synchronize_post_reset(CPUState *cpu, run_on_cpu_data arg) |
ea375f9a | 2712 | { |
20d695a9 | 2713 | kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE); |
99f31832 | 2714 | cpu->vcpu_dirty = false; |
ea375f9a JK |
2715 | } |
2716 | ||
c8e2085d DH |
2717 | void kvm_cpu_synchronize_post_reset(CPUState *cpu) |
2718 | { | |
14e6fe12 | 2719 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_reset, RUN_ON_CPU_NULL); |
c8e2085d DH |
2720 | } |
2721 | ||
14e6fe12 | 2722 | static void do_kvm_cpu_synchronize_post_init(CPUState *cpu, run_on_cpu_data arg) |
ea375f9a | 2723 | { |
20d695a9 | 2724 | kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE); |
99f31832 | 2725 | cpu->vcpu_dirty = false; |
ea375f9a JK |
2726 | } |
2727 | ||
c8e2085d DH |
2728 | void kvm_cpu_synchronize_post_init(CPUState *cpu) |
2729 | { | |
14e6fe12 | 2730 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, RUN_ON_CPU_NULL); |
c8e2085d DH |
2731 | } |
2732 | ||
75e972da DG |
2733 | static void do_kvm_cpu_synchronize_pre_loadvm(CPUState *cpu, run_on_cpu_data arg) |
2734 | { | |
99f31832 | 2735 | cpu->vcpu_dirty = true; |
75e972da DG |
2736 | } |
2737 | ||
2738 | void kvm_cpu_synchronize_pre_loadvm(CPUState *cpu) | |
2739 | { | |
2740 | run_on_cpu(cpu, do_kvm_cpu_synchronize_pre_loadvm, RUN_ON_CPU_NULL); | |
2741 | } | |
2742 | ||
2ae41db2 PB |
2743 | #ifdef KVM_HAVE_MCE_INJECTION |
2744 | static __thread void *pending_sigbus_addr; | |
2745 | static __thread int pending_sigbus_code; | |
2746 | static __thread bool have_sigbus_pending; | |
2747 | #endif | |
2748 | ||
cf0f7cf9 PB |
2749 | static void kvm_cpu_kick(CPUState *cpu) |
2750 | { | |
d73415a3 | 2751 | qatomic_set(&cpu->kvm_run->immediate_exit, 1); |
cf0f7cf9 PB |
2752 | } |
2753 | ||
2754 | static void kvm_cpu_kick_self(void) | |
2755 | { | |
2756 | if (kvm_immediate_exit) { | |
2757 | kvm_cpu_kick(current_cpu); | |
2758 | } else { | |
2759 | qemu_cpu_kick_self(); | |
2760 | } | |
2761 | } | |
2762 | ||
18268b60 PB |
2763 | static void kvm_eat_signals(CPUState *cpu) |
2764 | { | |
2765 | struct timespec ts = { 0, 0 }; | |
2766 | siginfo_t siginfo; | |
2767 | sigset_t waitset; | |
2768 | sigset_t chkset; | |
2769 | int r; | |
2770 | ||
cf0f7cf9 | 2771 | if (kvm_immediate_exit) { |
d73415a3 | 2772 | qatomic_set(&cpu->kvm_run->immediate_exit, 0); |
cf0f7cf9 PB |
2773 | /* Write kvm_run->immediate_exit before the cpu->exit_request |
2774 | * write in kvm_cpu_exec. | |
2775 | */ | |
2776 | smp_wmb(); | |
2777 | return; | |
2778 | } | |
2779 | ||
18268b60 PB |
2780 | sigemptyset(&waitset); |
2781 | sigaddset(&waitset, SIG_IPI); | |
2782 | ||
2783 | do { | |
2784 | r = sigtimedwait(&waitset, &siginfo, &ts); | |
2785 | if (r == -1 && !(errno == EAGAIN || errno == EINTR)) { | |
2786 | perror("sigtimedwait"); | |
2787 | exit(1); | |
2788 | } | |
2789 | ||
2790 | r = sigpending(&chkset); | |
2791 | if (r == -1) { | |
2792 | perror("sigpending"); | |
2793 | exit(1); | |
2794 | } | |
2795 | } while (sigismember(&chkset, SIG_IPI)); | |
2796 | } | |
2797 | ||
1458c363 | 2798 | int kvm_cpu_exec(CPUState *cpu) |
05330448 | 2799 | { |
f7575c96 | 2800 | struct kvm_run *run = cpu->kvm_run; |
7cbb533f | 2801 | int ret, run_ret; |
05330448 | 2802 | |
8c0d577e | 2803 | DPRINTF("kvm_cpu_exec()\n"); |
05330448 | 2804 | |
20d695a9 | 2805 | if (kvm_arch_process_async_events(cpu)) { |
d73415a3 | 2806 | qatomic_set(&cpu->exit_request, 0); |
6792a57b | 2807 | return EXCP_HLT; |
9ccfac9e | 2808 | } |
0af691d7 | 2809 | |
4b8523ee | 2810 | qemu_mutex_unlock_iothread(); |
1d78a3c3 | 2811 | cpu_exec_start(cpu); |
4b8523ee | 2812 | |
9ccfac9e | 2813 | do { |
4c663752 PB |
2814 | MemTxAttrs attrs; |
2815 | ||
99f31832 | 2816 | if (cpu->vcpu_dirty) { |
20d695a9 | 2817 | kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE); |
99f31832 | 2818 | cpu->vcpu_dirty = false; |
4c0960c0 AK |
2819 | } |
2820 | ||
20d695a9 | 2821 | kvm_arch_pre_run(cpu, run); |
d73415a3 | 2822 | if (qatomic_read(&cpu->exit_request)) { |
9ccfac9e JK |
2823 | DPRINTF("interrupt exit requested\n"); |
2824 | /* | |
2825 | * KVM requires us to reenter the kernel after IO exits to complete | |
2826 | * instruction emulation. This self-signal will ensure that we | |
2827 | * leave ASAP again. | |
2828 | */ | |
cf0f7cf9 | 2829 | kvm_cpu_kick_self(); |
9ccfac9e | 2830 | } |
9ccfac9e | 2831 | |
cf0f7cf9 PB |
2832 | /* Read cpu->exit_request before KVM_RUN reads run->immediate_exit. |
2833 | * Matching barrier in kvm_eat_signals. | |
2834 | */ | |
2835 | smp_rmb(); | |
2836 | ||
1bc22652 | 2837 | run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0); |
9ccfac9e | 2838 | |
4c663752 | 2839 | attrs = kvm_arch_post_run(cpu, run); |
05330448 | 2840 | |
2ae41db2 PB |
2841 | #ifdef KVM_HAVE_MCE_INJECTION |
2842 | if (unlikely(have_sigbus_pending)) { | |
2843 | qemu_mutex_lock_iothread(); | |
2844 | kvm_arch_on_sigbus_vcpu(cpu, pending_sigbus_code, | |
2845 | pending_sigbus_addr); | |
2846 | have_sigbus_pending = false; | |
2847 | qemu_mutex_unlock_iothread(); | |
2848 | } | |
2849 | #endif | |
2850 | ||
7cbb533f | 2851 | if (run_ret < 0) { |
dc77d341 JK |
2852 | if (run_ret == -EINTR || run_ret == -EAGAIN) { |
2853 | DPRINTF("io window exit\n"); | |
18268b60 | 2854 | kvm_eat_signals(cpu); |
d73cd8f4 | 2855 | ret = EXCP_INTERRUPT; |
dc77d341 JK |
2856 | break; |
2857 | } | |
7b011fbc ME |
2858 | fprintf(stderr, "error: kvm run failed %s\n", |
2859 | strerror(-run_ret)); | |
dae02ba5 LV |
2860 | #ifdef TARGET_PPC |
2861 | if (run_ret == -EBUSY) { | |
2862 | fprintf(stderr, | |
2863 | "This is probably because your SMT is enabled.\n" | |
2864 | "VCPU can only run on primary threads with all " | |
2865 | "secondary threads offline.\n"); | |
2866 | } | |
2867 | #endif | |
a85e130e PB |
2868 | ret = -1; |
2869 | break; | |
05330448 AL |
2870 | } |
2871 | ||
b76ac80a | 2872 | trace_kvm_run_exit(cpu->cpu_index, run->exit_reason); |
05330448 AL |
2873 | switch (run->exit_reason) { |
2874 | case KVM_EXIT_IO: | |
8c0d577e | 2875 | DPRINTF("handle_io\n"); |
80b7d2ef | 2876 | /* Called outside BQL */ |
4c663752 | 2877 | kvm_handle_io(run->io.port, attrs, |
b30e93e9 JK |
2878 | (uint8_t *)run + run->io.data_offset, |
2879 | run->io.direction, | |
2880 | run->io.size, | |
2881 | run->io.count); | |
d73cd8f4 | 2882 | ret = 0; |
05330448 AL |
2883 | break; |
2884 | case KVM_EXIT_MMIO: | |
8c0d577e | 2885 | DPRINTF("handle_mmio\n"); |
de7ea885 | 2886 | /* Called outside BQL */ |
4c663752 PB |
2887 | address_space_rw(&address_space_memory, |
2888 | run->mmio.phys_addr, attrs, | |
2889 | run->mmio.data, | |
2890 | run->mmio.len, | |
2891 | run->mmio.is_write); | |
d73cd8f4 | 2892 | ret = 0; |
05330448 AL |
2893 | break; |
2894 | case KVM_EXIT_IRQ_WINDOW_OPEN: | |
8c0d577e | 2895 | DPRINTF("irq_window_open\n"); |
d73cd8f4 | 2896 | ret = EXCP_INTERRUPT; |
05330448 AL |
2897 | break; |
2898 | case KVM_EXIT_SHUTDOWN: | |
8c0d577e | 2899 | DPRINTF("shutdown\n"); |
cf83f140 | 2900 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
d73cd8f4 | 2901 | ret = EXCP_INTERRUPT; |
05330448 AL |
2902 | break; |
2903 | case KVM_EXIT_UNKNOWN: | |
bb44e0d1 JK |
2904 | fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", |
2905 | (uint64_t)run->hw.hardware_exit_reason); | |
73aaec4a | 2906 | ret = -1; |
05330448 | 2907 | break; |
7c80eef8 | 2908 | case KVM_EXIT_INTERNAL_ERROR: |
5326ab55 | 2909 | ret = kvm_handle_internal_error(cpu, run); |
7c80eef8 | 2910 | break; |
b4420f19 PX |
2911 | case KVM_EXIT_DIRTY_RING_FULL: |
2912 | /* | |
2913 | * We shouldn't continue if the dirty ring of this vcpu is | |
2914 | * still full. Got kicked by KVM_RESET_DIRTY_RINGS. | |
2915 | */ | |
2916 | trace_kvm_dirty_ring_full(cpu->cpu_index); | |
2917 | qemu_mutex_lock_iothread(); | |
2918 | kvm_dirty_ring_reap(kvm_state); | |
2919 | qemu_mutex_unlock_iothread(); | |
2920 | ret = 0; | |
2921 | break; | |
99040447 PS |
2922 | case KVM_EXIT_SYSTEM_EVENT: |
2923 | switch (run->system_event.type) { | |
2924 | case KVM_SYSTEM_EVENT_SHUTDOWN: | |
cf83f140 | 2925 | qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); |
99040447 PS |
2926 | ret = EXCP_INTERRUPT; |
2927 | break; | |
2928 | case KVM_SYSTEM_EVENT_RESET: | |
cf83f140 | 2929 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
99040447 PS |
2930 | ret = EXCP_INTERRUPT; |
2931 | break; | |
7c207b90 | 2932 | case KVM_SYSTEM_EVENT_CRASH: |
d187e08d | 2933 | kvm_cpu_synchronize_state(cpu); |
7c207b90 | 2934 | qemu_mutex_lock_iothread(); |
c86f106b | 2935 | qemu_system_guest_panicked(cpu_get_crash_info(cpu)); |
7c207b90 AS |
2936 | qemu_mutex_unlock_iothread(); |
2937 | ret = 0; | |
2938 | break; | |
99040447 PS |
2939 | default: |
2940 | DPRINTF("kvm_arch_handle_exit\n"); | |
2941 | ret = kvm_arch_handle_exit(cpu, run); | |
2942 | break; | |
2943 | } | |
2944 | break; | |
05330448 | 2945 | default: |
8c0d577e | 2946 | DPRINTF("kvm_arch_handle_exit\n"); |
20d695a9 | 2947 | ret = kvm_arch_handle_exit(cpu, run); |
05330448 AL |
2948 | break; |
2949 | } | |
d73cd8f4 | 2950 | } while (ret == 0); |
05330448 | 2951 | |
1d78a3c3 | 2952 | cpu_exec_end(cpu); |
4b8523ee JK |
2953 | qemu_mutex_lock_iothread(); |
2954 | ||
73aaec4a | 2955 | if (ret < 0) { |
90c84c56 | 2956 | cpu_dump_state(cpu, stderr, CPU_DUMP_CODE); |
0461d5a6 | 2957 | vm_stop(RUN_STATE_INTERNAL_ERROR); |
becfc390 AL |
2958 | } |
2959 | ||
d73415a3 | 2960 | qatomic_set(&cpu->exit_request, 0); |
05330448 AL |
2961 | return ret; |
2962 | } | |
2963 | ||
984b5181 | 2964 | int kvm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
2965 | { |
2966 | int ret; | |
984b5181 AL |
2967 | void *arg; |
2968 | va_list ap; | |
05330448 | 2969 | |
984b5181 AL |
2970 | va_start(ap, type); |
2971 | arg = va_arg(ap, void *); | |
2972 | va_end(ap); | |
2973 | ||
9c775729 | 2974 | trace_kvm_ioctl(type, arg); |
984b5181 | 2975 | ret = ioctl(s->fd, type, arg); |
a426e122 | 2976 | if (ret == -1) { |
05330448 | 2977 | ret = -errno; |
a426e122 | 2978 | } |
05330448 AL |
2979 | return ret; |
2980 | } | |
2981 | ||
984b5181 | 2982 | int kvm_vm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
2983 | { |
2984 | int ret; | |
984b5181 AL |
2985 | void *arg; |
2986 | va_list ap; | |
2987 | ||
2988 | va_start(ap, type); | |
2989 | arg = va_arg(ap, void *); | |
2990 | va_end(ap); | |
05330448 | 2991 | |
9c775729 | 2992 | trace_kvm_vm_ioctl(type, arg); |
984b5181 | 2993 | ret = ioctl(s->vmfd, type, arg); |
a426e122 | 2994 | if (ret == -1) { |
05330448 | 2995 | ret = -errno; |
a426e122 | 2996 | } |
05330448 AL |
2997 | return ret; |
2998 | } | |
2999 | ||
1bc22652 | 3000 | int kvm_vcpu_ioctl(CPUState *cpu, int type, ...) |
05330448 AL |
3001 | { |
3002 | int ret; | |
984b5181 AL |
3003 | void *arg; |
3004 | va_list ap; | |
3005 | ||
3006 | va_start(ap, type); | |
3007 | arg = va_arg(ap, void *); | |
3008 | va_end(ap); | |
05330448 | 3009 | |
9c775729 | 3010 | trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg); |
8737c51c | 3011 | ret = ioctl(cpu->kvm_fd, type, arg); |
a426e122 | 3012 | if (ret == -1) { |
05330448 | 3013 | ret = -errno; |
a426e122 | 3014 | } |
05330448 AL |
3015 | return ret; |
3016 | } | |
bd322087 | 3017 | |
0a6a7cca CD |
3018 | int kvm_device_ioctl(int fd, int type, ...) |
3019 | { | |
3020 | int ret; | |
3021 | void *arg; | |
3022 | va_list ap; | |
3023 | ||
3024 | va_start(ap, type); | |
3025 | arg = va_arg(ap, void *); | |
3026 | va_end(ap); | |
3027 | ||
3028 | trace_kvm_device_ioctl(fd, type, arg); | |
3029 | ret = ioctl(fd, type, arg); | |
3030 | if (ret == -1) { | |
3031 | ret = -errno; | |
3032 | } | |
3033 | return ret; | |
3034 | } | |
3035 | ||
d0a073a1 DD |
3036 | int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr) |
3037 | { | |
3038 | int ret; | |
3039 | struct kvm_device_attr attribute = { | |
3040 | .group = group, | |
3041 | .attr = attr, | |
3042 | }; | |
3043 | ||
3044 | if (!kvm_vm_attributes_allowed) { | |
3045 | return 0; | |
3046 | } | |
3047 | ||
3048 | ret = kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attribute); | |
3049 | /* kvm returns 0 on success for HAS_DEVICE_ATTR */ | |
3050 | return ret ? 0 : 1; | |
3051 | } | |
3052 | ||
4b3cfe72 PF |
3053 | int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr) |
3054 | { | |
3055 | struct kvm_device_attr attribute = { | |
3056 | .group = group, | |
3057 | .attr = attr, | |
3058 | .flags = 0, | |
3059 | }; | |
3060 | ||
3061 | return kvm_device_ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute) ? 0 : 1; | |
3062 | } | |
3063 | ||
556969e9 EA |
3064 | int kvm_device_access(int fd, int group, uint64_t attr, |
3065 | void *val, bool write, Error **errp) | |
4b3cfe72 PF |
3066 | { |
3067 | struct kvm_device_attr kvmattr; | |
3068 | int err; | |
3069 | ||
3070 | kvmattr.flags = 0; | |
3071 | kvmattr.group = group; | |
3072 | kvmattr.attr = attr; | |
3073 | kvmattr.addr = (uintptr_t)val; | |
3074 | ||
3075 | err = kvm_device_ioctl(fd, | |
3076 | write ? KVM_SET_DEVICE_ATTR : KVM_GET_DEVICE_ATTR, | |
3077 | &kvmattr); | |
3078 | if (err < 0) { | |
556969e9 EA |
3079 | error_setg_errno(errp, -err, |
3080 | "KVM_%s_DEVICE_ATTR failed: Group %d " | |
3081 | "attr 0x%016" PRIx64, | |
3082 | write ? "SET" : "GET", group, attr); | |
4b3cfe72 | 3083 | } |
556969e9 | 3084 | return err; |
4b3cfe72 PF |
3085 | } |
3086 | ||
62dd4eda | 3087 | bool kvm_has_sync_mmu(void) |
bd322087 | 3088 | { |
62dd4eda | 3089 | return kvm_state->sync_mmu; |
bd322087 | 3090 | } |
e22a25c9 | 3091 | |
a0fb002c JK |
3092 | int kvm_has_vcpu_events(void) |
3093 | { | |
3094 | return kvm_state->vcpu_events; | |
3095 | } | |
3096 | ||
b0b1d690 JK |
3097 | int kvm_has_robust_singlestep(void) |
3098 | { | |
3099 | return kvm_state->robust_singlestep; | |
3100 | } | |
3101 | ||
ff44f1a3 JK |
3102 | int kvm_has_debugregs(void) |
3103 | { | |
3104 | return kvm_state->debugregs; | |
3105 | } | |
3106 | ||
ebbfef2f LA |
3107 | int kvm_max_nested_state_length(void) |
3108 | { | |
3109 | return kvm_state->max_nested_state_len; | |
3110 | } | |
3111 | ||
d2f2b8a7 SH |
3112 | int kvm_has_many_ioeventfds(void) |
3113 | { | |
3114 | if (!kvm_enabled()) { | |
3115 | return 0; | |
3116 | } | |
3117 | return kvm_state->many_ioeventfds; | |
3118 | } | |
3119 | ||
84b058d7 JK |
3120 | int kvm_has_gsi_routing(void) |
3121 | { | |
a9c5eb0d | 3122 | #ifdef KVM_CAP_IRQ_ROUTING |
84b058d7 | 3123 | return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING); |
a9c5eb0d AG |
3124 | #else |
3125 | return false; | |
3126 | #endif | |
84b058d7 JK |
3127 | } |
3128 | ||
3ab73842 JK |
3129 | int kvm_has_intx_set_mask(void) |
3130 | { | |
3131 | return kvm_state->intx_set_mask; | |
3132 | } | |
3133 | ||
5d721b78 AG |
3134 | bool kvm_arm_supports_user_irq(void) |
3135 | { | |
3136 | return kvm_check_extension(kvm_state, KVM_CAP_ARM_USER_IRQ); | |
3137 | } | |
3138 | ||
e22a25c9 | 3139 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
a60f24b5 | 3140 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu, |
e22a25c9 AL |
3141 | target_ulong pc) |
3142 | { | |
3143 | struct kvm_sw_breakpoint *bp; | |
3144 | ||
a60f24b5 | 3145 | QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) { |
a426e122 | 3146 | if (bp->pc == pc) { |
e22a25c9 | 3147 | return bp; |
a426e122 | 3148 | } |
e22a25c9 AL |
3149 | } |
3150 | return NULL; | |
3151 | } | |
3152 | ||
a60f24b5 | 3153 | int kvm_sw_breakpoints_active(CPUState *cpu) |
e22a25c9 | 3154 | { |
a60f24b5 | 3155 | return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints); |
e22a25c9 AL |
3156 | } |
3157 | ||
452e4751 GC |
3158 | struct kvm_set_guest_debug_data { |
3159 | struct kvm_guest_debug dbg; | |
452e4751 GC |
3160 | int err; |
3161 | }; | |
3162 | ||
14e6fe12 | 3163 | static void kvm_invoke_set_guest_debug(CPUState *cpu, run_on_cpu_data data) |
452e4751 | 3164 | { |
14e6fe12 PB |
3165 | struct kvm_set_guest_debug_data *dbg_data = |
3166 | (struct kvm_set_guest_debug_data *) data.host_ptr; | |
b3807725 | 3167 | |
3c0ed2a3 | 3168 | dbg_data->err = kvm_vcpu_ioctl(cpu, KVM_SET_GUEST_DEBUG, |
a60f24b5 | 3169 | &dbg_data->dbg); |
452e4751 GC |
3170 | } |
3171 | ||
38e478ec | 3172 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 | 3173 | { |
452e4751 | 3174 | struct kvm_set_guest_debug_data data; |
e22a25c9 | 3175 | |
b0b1d690 | 3176 | data.dbg.control = reinject_trap; |
e22a25c9 | 3177 | |
ed2803da | 3178 | if (cpu->singlestep_enabled) { |
b0b1d690 JK |
3179 | data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
3180 | } | |
20d695a9 | 3181 | kvm_arch_update_guest_debug(cpu, &data.dbg); |
e22a25c9 | 3182 | |
14e6fe12 PB |
3183 | run_on_cpu(cpu, kvm_invoke_set_guest_debug, |
3184 | RUN_ON_CPU_HOST_PTR(&data)); | |
452e4751 | 3185 | return data.err; |
e22a25c9 AL |
3186 | } |
3187 | ||
62278814 | 3188 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
3189 | target_ulong len, int type) |
3190 | { | |
3191 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
3192 | int err; |
3193 | ||
3194 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 3195 | bp = kvm_find_sw_breakpoint(cpu, addr); |
e22a25c9 AL |
3196 | if (bp) { |
3197 | bp->use_count++; | |
3198 | return 0; | |
3199 | } | |
3200 | ||
7267c094 | 3201 | bp = g_malloc(sizeof(struct kvm_sw_breakpoint)); |
e22a25c9 AL |
3202 | bp->pc = addr; |
3203 | bp->use_count = 1; | |
80b7cd73 | 3204 | err = kvm_arch_insert_sw_breakpoint(cpu, bp); |
e22a25c9 | 3205 | if (err) { |
7267c094 | 3206 | g_free(bp); |
e22a25c9 AL |
3207 | return err; |
3208 | } | |
3209 | ||
80b7cd73 | 3210 | QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
e22a25c9 AL |
3211 | } else { |
3212 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); | |
a426e122 | 3213 | if (err) { |
e22a25c9 | 3214 | return err; |
a426e122 | 3215 | } |
e22a25c9 AL |
3216 | } |
3217 | ||
bdc44640 | 3218 | CPU_FOREACH(cpu) { |
38e478ec | 3219 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 3220 | if (err) { |
e22a25c9 | 3221 | return err; |
a426e122 | 3222 | } |
e22a25c9 AL |
3223 | } |
3224 | return 0; | |
3225 | } | |
3226 | ||
62278814 | 3227 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
3228 | target_ulong len, int type) |
3229 | { | |
3230 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
3231 | int err; |
3232 | ||
3233 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 3234 | bp = kvm_find_sw_breakpoint(cpu, addr); |
a426e122 | 3235 | if (!bp) { |
e22a25c9 | 3236 | return -ENOENT; |
a426e122 | 3237 | } |
e22a25c9 AL |
3238 | |
3239 | if (bp->use_count > 1) { | |
3240 | bp->use_count--; | |
3241 | return 0; | |
3242 | } | |
3243 | ||
80b7cd73 | 3244 | err = kvm_arch_remove_sw_breakpoint(cpu, bp); |
a426e122 | 3245 | if (err) { |
e22a25c9 | 3246 | return err; |
a426e122 | 3247 | } |
e22a25c9 | 3248 | |
80b7cd73 | 3249 | QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
7267c094 | 3250 | g_free(bp); |
e22a25c9 AL |
3251 | } else { |
3252 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); | |
a426e122 | 3253 | if (err) { |
e22a25c9 | 3254 | return err; |
a426e122 | 3255 | } |
e22a25c9 AL |
3256 | } |
3257 | ||
bdc44640 | 3258 | CPU_FOREACH(cpu) { |
38e478ec | 3259 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 3260 | if (err) { |
e22a25c9 | 3261 | return err; |
a426e122 | 3262 | } |
e22a25c9 AL |
3263 | } |
3264 | return 0; | |
3265 | } | |
3266 | ||
1d5791f4 | 3267 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
3268 | { |
3269 | struct kvm_sw_breakpoint *bp, *next; | |
80b7cd73 | 3270 | KVMState *s = cpu->kvm_state; |
dc54e252 | 3271 | CPUState *tmpcpu; |
e22a25c9 | 3272 | |
72cf2d4f | 3273 | QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
80b7cd73 | 3274 | if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) { |
e22a25c9 | 3275 | /* Try harder to find a CPU that currently sees the breakpoint. */ |
dc54e252 CG |
3276 | CPU_FOREACH(tmpcpu) { |
3277 | if (kvm_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) { | |
e22a25c9 | 3278 | break; |
a426e122 | 3279 | } |
e22a25c9 AL |
3280 | } |
3281 | } | |
78021d6d JK |
3282 | QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry); |
3283 | g_free(bp); | |
e22a25c9 AL |
3284 | } |
3285 | kvm_arch_remove_all_hw_breakpoints(); | |
3286 | ||
bdc44640 | 3287 | CPU_FOREACH(cpu) { |
38e478ec | 3288 | kvm_update_guest_debug(cpu, 0); |
a426e122 | 3289 | } |
e22a25c9 AL |
3290 | } |
3291 | ||
3292 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ | |
3293 | ||
38e478ec | 3294 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 AL |
3295 | { |
3296 | return -EINVAL; | |
3297 | } | |
3298 | ||
62278814 | 3299 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
3300 | target_ulong len, int type) |
3301 | { | |
3302 | return -EINVAL; | |
3303 | } | |
3304 | ||
62278814 | 3305 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
3306 | target_ulong len, int type) |
3307 | { | |
3308 | return -EINVAL; | |
3309 | } | |
3310 | ||
1d5791f4 | 3311 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
3312 | { |
3313 | } | |
3314 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ | |
cc84de95 | 3315 | |
18268b60 | 3316 | static int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset) |
cc84de95 | 3317 | { |
aed6efb9 | 3318 | KVMState *s = kvm_state; |
cc84de95 MT |
3319 | struct kvm_signal_mask *sigmask; |
3320 | int r; | |
3321 | ||
7267c094 | 3322 | sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset)); |
cc84de95 | 3323 | |
aed6efb9 | 3324 | sigmask->len = s->sigmask_len; |
cc84de95 | 3325 | memcpy(sigmask->sigset, sigset, sizeof(*sigset)); |
1bc22652 | 3326 | r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask); |
7267c094 | 3327 | g_free(sigmask); |
cc84de95 MT |
3328 | |
3329 | return r; | |
3330 | } | |
4d39892c | 3331 | |
cf0f7cf9 | 3332 | static void kvm_ipi_signal(int sig) |
18268b60 | 3333 | { |
cf0f7cf9 PB |
3334 | if (current_cpu) { |
3335 | assert(kvm_immediate_exit); | |
3336 | kvm_cpu_kick(current_cpu); | |
3337 | } | |
18268b60 PB |
3338 | } |
3339 | ||
3340 | void kvm_init_cpu_signals(CPUState *cpu) | |
3341 | { | |
3342 | int r; | |
3343 | sigset_t set; | |
3344 | struct sigaction sigact; | |
3345 | ||
3346 | memset(&sigact, 0, sizeof(sigact)); | |
cf0f7cf9 | 3347 | sigact.sa_handler = kvm_ipi_signal; |
18268b60 PB |
3348 | sigaction(SIG_IPI, &sigact, NULL); |
3349 | ||
3350 | pthread_sigmask(SIG_BLOCK, NULL, &set); | |
3351 | #if defined KVM_HAVE_MCE_INJECTION | |
3352 | sigdelset(&set, SIGBUS); | |
3353 | pthread_sigmask(SIG_SETMASK, &set, NULL); | |
3354 | #endif | |
3355 | sigdelset(&set, SIG_IPI); | |
cf0f7cf9 PB |
3356 | if (kvm_immediate_exit) { |
3357 | r = pthread_sigmask(SIG_SETMASK, &set, NULL); | |
3358 | } else { | |
3359 | r = kvm_set_signal_mask(cpu, &set); | |
3360 | } | |
18268b60 PB |
3361 | if (r) { |
3362 | fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r)); | |
3363 | exit(1); | |
3364 | } | |
3365 | } | |
3366 | ||
2ae41db2 | 3367 | /* Called asynchronously in VCPU thread. */ |
290adf38 | 3368 | int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) |
a1b87fe0 | 3369 | { |
2ae41db2 PB |
3370 | #ifdef KVM_HAVE_MCE_INJECTION |
3371 | if (have_sigbus_pending) { | |
3372 | return 1; | |
3373 | } | |
3374 | have_sigbus_pending = true; | |
3375 | pending_sigbus_addr = addr; | |
3376 | pending_sigbus_code = code; | |
d73415a3 | 3377 | qatomic_set(&cpu->exit_request, 1); |
2ae41db2 PB |
3378 | return 0; |
3379 | #else | |
3380 | return 1; | |
3381 | #endif | |
a1b87fe0 JK |
3382 | } |
3383 | ||
2ae41db2 | 3384 | /* Called synchronously (via signalfd) in main thread. */ |
a1b87fe0 JK |
3385 | int kvm_on_sigbus(int code, void *addr) |
3386 | { | |
2ae41db2 | 3387 | #ifdef KVM_HAVE_MCE_INJECTION |
4d39892c PB |
3388 | /* Action required MCE kills the process if SIGBUS is blocked. Because |
3389 | * that's what happens in the I/O thread, where we handle MCE via signalfd, | |
3390 | * we can only get action optional here. | |
3391 | */ | |
3392 | assert(code != BUS_MCEERR_AR); | |
3393 | kvm_arch_on_sigbus_vcpu(first_cpu, code, addr); | |
3394 | return 0; | |
2ae41db2 PB |
3395 | #else |
3396 | return 1; | |
3397 | #endif | |
a1b87fe0 | 3398 | } |
0a6a7cca CD |
3399 | |
3400 | int kvm_create_device(KVMState *s, uint64_t type, bool test) | |
3401 | { | |
3402 | int ret; | |
3403 | struct kvm_create_device create_dev; | |
3404 | ||
3405 | create_dev.type = type; | |
3406 | create_dev.fd = -1; | |
3407 | create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0; | |
3408 | ||
3409 | if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) { | |
3410 | return -ENOTSUP; | |
3411 | } | |
3412 | ||
3413 | ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev); | |
3414 | if (ret) { | |
3415 | return ret; | |
3416 | } | |
3417 | ||
3418 | return test ? 0 : create_dev.fd; | |
3419 | } | |
ada4135f | 3420 | |
29039acf PX |
3421 | bool kvm_device_supported(int vmfd, uint64_t type) |
3422 | { | |
3423 | struct kvm_create_device create_dev = { | |
3424 | .type = type, | |
3425 | .fd = -1, | |
3426 | .flags = KVM_CREATE_DEVICE_TEST, | |
3427 | }; | |
3428 | ||
3429 | if (ioctl(vmfd, KVM_CHECK_EXTENSION, KVM_CAP_DEVICE_CTRL) <= 0) { | |
3430 | return false; | |
3431 | } | |
3432 | ||
3433 | return (ioctl(vmfd, KVM_CREATE_DEVICE, &create_dev) >= 0); | |
3434 | } | |
3435 | ||
ada4135f CH |
3436 | int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source) |
3437 | { | |
3438 | struct kvm_one_reg reg; | |
3439 | int r; | |
3440 | ||
3441 | reg.id = id; | |
3442 | reg.addr = (uintptr_t) source; | |
3443 | r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); | |
3444 | if (r) { | |
844a3d34 | 3445 | trace_kvm_failed_reg_set(id, strerror(-r)); |
ada4135f CH |
3446 | } |
3447 | return r; | |
3448 | } | |
3449 | ||
3450 | int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target) | |
3451 | { | |
3452 | struct kvm_one_reg reg; | |
3453 | int r; | |
3454 | ||
3455 | reg.id = id; | |
3456 | reg.addr = (uintptr_t) target; | |
3457 | r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); | |
3458 | if (r) { | |
844a3d34 | 3459 | trace_kvm_failed_reg_get(id, strerror(-r)); |
ada4135f CH |
3460 | } |
3461 | return r; | |
3462 | } | |
782c3f29 | 3463 | |
8072aae3 AK |
3464 | static bool kvm_accel_has_memory(MachineState *ms, AddressSpace *as, |
3465 | hwaddr start_addr, hwaddr size) | |
3466 | { | |
3467 | KVMState *kvm = KVM_STATE(ms->accelerator); | |
3468 | int i; | |
3469 | ||
3470 | for (i = 0; i < kvm->nr_as; ++i) { | |
3471 | if (kvm->as[i].as == as && kvm->as[i].ml) { | |
023ae9a8 | 3472 | size = MIN(kvm_max_slot_size, size); |
8072aae3 AK |
3473 | return NULL != kvm_lookup_matching_slot(kvm->as[i].ml, |
3474 | start_addr, size); | |
3475 | } | |
3476 | } | |
3477 | ||
3478 | return false; | |
3479 | } | |
3480 | ||
23b0898e PB |
3481 | static void kvm_get_kvm_shadow_mem(Object *obj, Visitor *v, |
3482 | const char *name, void *opaque, | |
3483 | Error **errp) | |
3484 | { | |
3485 | KVMState *s = KVM_STATE(obj); | |
3486 | int64_t value = s->kvm_shadow_mem; | |
3487 | ||
3488 | visit_type_int(v, name, &value, errp); | |
3489 | } | |
3490 | ||
3491 | static void kvm_set_kvm_shadow_mem(Object *obj, Visitor *v, | |
3492 | const char *name, void *opaque, | |
3493 | Error **errp) | |
3494 | { | |
3495 | KVMState *s = KVM_STATE(obj); | |
23b0898e PB |
3496 | int64_t value; |
3497 | ||
70cbae42 PB |
3498 | if (s->fd != -1) { |
3499 | error_setg(errp, "Cannot set properties after the accelerator has been initialized"); | |
3500 | return; | |
3501 | } | |
3502 | ||
668f62ec | 3503 | if (!visit_type_int(v, name, &value, errp)) { |
23b0898e PB |
3504 | return; |
3505 | } | |
3506 | ||
3507 | s->kvm_shadow_mem = value; | |
3508 | } | |
3509 | ||
11bc4a13 PB |
3510 | static void kvm_set_kernel_irqchip(Object *obj, Visitor *v, |
3511 | const char *name, void *opaque, | |
3512 | Error **errp) | |
3513 | { | |
11bc4a13 PB |
3514 | KVMState *s = KVM_STATE(obj); |
3515 | OnOffSplit mode; | |
3516 | ||
70cbae42 PB |
3517 | if (s->fd != -1) { |
3518 | error_setg(errp, "Cannot set properties after the accelerator has been initialized"); | |
3519 | return; | |
3520 | } | |
3521 | ||
14217038 | 3522 | if (!visit_type_OnOffSplit(v, name, &mode, errp)) { |
11bc4a13 | 3523 | return; |
14217038 MA |
3524 | } |
3525 | switch (mode) { | |
3526 | case ON_OFF_SPLIT_ON: | |
3527 | s->kernel_irqchip_allowed = true; | |
3528 | s->kernel_irqchip_required = true; | |
3529 | s->kernel_irqchip_split = ON_OFF_AUTO_OFF; | |
3530 | break; | |
3531 | case ON_OFF_SPLIT_OFF: | |
3532 | s->kernel_irqchip_allowed = false; | |
3533 | s->kernel_irqchip_required = false; | |
3534 | s->kernel_irqchip_split = ON_OFF_AUTO_OFF; | |
3535 | break; | |
3536 | case ON_OFF_SPLIT_SPLIT: | |
3537 | s->kernel_irqchip_allowed = true; | |
3538 | s->kernel_irqchip_required = true; | |
3539 | s->kernel_irqchip_split = ON_OFF_AUTO_ON; | |
3540 | break; | |
3541 | default: | |
3542 | /* The value was checked in visit_type_OnOffSplit() above. If | |
3543 | * we get here, then something is wrong in QEMU. | |
3544 | */ | |
3545 | abort(); | |
11bc4a13 PB |
3546 | } |
3547 | } | |
3548 | ||
4376c40d PB |
3549 | bool kvm_kernel_irqchip_allowed(void) |
3550 | { | |
11bc4a13 | 3551 | return kvm_state->kernel_irqchip_allowed; |
4376c40d PB |
3552 | } |
3553 | ||
3554 | bool kvm_kernel_irqchip_required(void) | |
3555 | { | |
11bc4a13 | 3556 | return kvm_state->kernel_irqchip_required; |
4376c40d PB |
3557 | } |
3558 | ||
3559 | bool kvm_kernel_irqchip_split(void) | |
3560 | { | |
d1972be1 | 3561 | return kvm_state->kernel_irqchip_split == ON_OFF_AUTO_ON; |
4376c40d PB |
3562 | } |
3563 | ||
2ea5cb0a PX |
3564 | static void kvm_get_dirty_ring_size(Object *obj, Visitor *v, |
3565 | const char *name, void *opaque, | |
3566 | Error **errp) | |
3567 | { | |
3568 | KVMState *s = KVM_STATE(obj); | |
3569 | uint32_t value = s->kvm_dirty_ring_size; | |
3570 | ||
3571 | visit_type_uint32(v, name, &value, errp); | |
3572 | } | |
3573 | ||
3574 | static void kvm_set_dirty_ring_size(Object *obj, Visitor *v, | |
3575 | const char *name, void *opaque, | |
3576 | Error **errp) | |
3577 | { | |
3578 | KVMState *s = KVM_STATE(obj); | |
3579 | Error *error = NULL; | |
3580 | uint32_t value; | |
3581 | ||
3582 | if (s->fd != -1) { | |
3583 | error_setg(errp, "Cannot set properties after the accelerator has been initialized"); | |
3584 | return; | |
3585 | } | |
3586 | ||
3587 | visit_type_uint32(v, name, &value, &error); | |
3588 | if (error) { | |
3589 | error_propagate(errp, error); | |
3590 | return; | |
3591 | } | |
3592 | if (value & (value - 1)) { | |
3593 | error_setg(errp, "dirty-ring-size must be a power of two."); | |
3594 | return; | |
3595 | } | |
3596 | ||
3597 | s->kvm_dirty_ring_size = value; | |
3598 | } | |
3599 | ||
23b0898e PB |
3600 | static void kvm_accel_instance_init(Object *obj) |
3601 | { | |
3602 | KVMState *s = KVM_STATE(obj); | |
3603 | ||
70cbae42 PB |
3604 | s->fd = -1; |
3605 | s->vmfd = -1; | |
23b0898e | 3606 | s->kvm_shadow_mem = -1; |
d1972be1 XL |
3607 | s->kernel_irqchip_allowed = true; |
3608 | s->kernel_irqchip_split = ON_OFF_AUTO_AUTO; | |
2ea5cb0a PX |
3609 | /* KVM dirty ring is by default off */ |
3610 | s->kvm_dirty_ring_size = 0; | |
23b0898e PB |
3611 | } |
3612 | ||
782c3f29 EH |
3613 | static void kvm_accel_class_init(ObjectClass *oc, void *data) |
3614 | { | |
3615 | AccelClass *ac = ACCEL_CLASS(oc); | |
3616 | ac->name = "KVM"; | |
0d15da8e | 3617 | ac->init_machine = kvm_init; |
8072aae3 | 3618 | ac->has_memory = kvm_accel_has_memory; |
782c3f29 | 3619 | ac->allowed = &kvm_allowed; |
23b0898e | 3620 | |
11bc4a13 PB |
3621 | object_class_property_add(oc, "kernel-irqchip", "on|off|split", |
3622 | NULL, kvm_set_kernel_irqchip, | |
d2623129 | 3623 | NULL, NULL); |
11bc4a13 | 3624 | object_class_property_set_description(oc, "kernel-irqchip", |
7eecec7d | 3625 | "Configure KVM in-kernel irqchip"); |
11bc4a13 | 3626 | |
23b0898e PB |
3627 | object_class_property_add(oc, "kvm-shadow-mem", "int", |
3628 | kvm_get_kvm_shadow_mem, kvm_set_kvm_shadow_mem, | |
d2623129 | 3629 | NULL, NULL); |
23b0898e | 3630 | object_class_property_set_description(oc, "kvm-shadow-mem", |
7eecec7d | 3631 | "KVM shadow MMU size"); |
2ea5cb0a PX |
3632 | |
3633 | object_class_property_add(oc, "dirty-ring-size", "uint32", | |
3634 | kvm_get_dirty_ring_size, kvm_set_dirty_ring_size, | |
3635 | NULL, NULL); | |
3636 | object_class_property_set_description(oc, "dirty-ring-size", | |
3637 | "Size of KVM dirty page ring buffer (default: 0, i.e. use bitmap)"); | |
782c3f29 EH |
3638 | } |
3639 | ||
3640 | static const TypeInfo kvm_accel_type = { | |
3641 | .name = TYPE_KVM_ACCEL, | |
3642 | .parent = TYPE_ACCEL, | |
23b0898e | 3643 | .instance_init = kvm_accel_instance_init, |
782c3f29 | 3644 | .class_init = kvm_accel_class_init, |
fc02086b | 3645 | .instance_size = sizeof(KVMState), |
782c3f29 EH |
3646 | }; |
3647 | ||
3648 | static void kvm_type_init(void) | |
3649 | { | |
3650 | type_register_static(&kvm_accel_type); | |
3651 | } | |
3652 | ||
3653 | type_init(kvm_type_init); |