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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 | 413 | if (cpu->kvm_dirty_gfns) { |
dcafa248 | 414 | ret = munmap(cpu->kvm_dirty_gfns, s->kvm_dirty_ring_bytes); |
b4420f19 PX |
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; |
7786ae40 | 472 | cpu->dirty_pages = 0; |
05330448 AL |
473 | |
474 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
475 | if (mmap_size < 0) { | |
748a680b | 476 | ret = mmap_size; |
d0a92b35 DDAG |
477 | error_setg_errno(errp, -mmap_size, |
478 | "kvm_init_vcpu: KVM_GET_VCPU_MMAP_SIZE failed"); | |
05330448 AL |
479 | goto err; |
480 | } | |
481 | ||
f7575c96 | 482 | cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, |
8737c51c | 483 | cpu->kvm_fd, 0); |
f7575c96 | 484 | if (cpu->kvm_run == MAP_FAILED) { |
05330448 | 485 | ret = -errno; |
d0a92b35 DDAG |
486 | error_setg_errno(errp, ret, |
487 | "kvm_init_vcpu: mmap'ing vcpu state failed (%lu)", | |
488 | kvm_arch_vcpu_id(cpu)); | |
05330448 AL |
489 | goto err; |
490 | } | |
491 | ||
a426e122 JK |
492 | if (s->coalesced_mmio && !s->coalesced_mmio_ring) { |
493 | s->coalesced_mmio_ring = | |
f7575c96 | 494 | (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE; |
a426e122 | 495 | } |
62a2744c | 496 | |
b4420f19 PX |
497 | if (s->kvm_dirty_ring_size) { |
498 | /* Use MAP_SHARED to share pages with the kernel */ | |
dcafa248 | 499 | cpu->kvm_dirty_gfns = mmap(NULL, s->kvm_dirty_ring_bytes, |
b4420f19 PX |
500 | PROT_READ | PROT_WRITE, MAP_SHARED, |
501 | cpu->kvm_fd, | |
502 | PAGE_SIZE * KVM_DIRTY_LOG_PAGE_OFFSET); | |
503 | if (cpu->kvm_dirty_gfns == MAP_FAILED) { | |
504 | ret = -errno; | |
505 | DPRINTF("mmap'ing vcpu dirty gfns failed: %d\n", ret); | |
506 | goto err; | |
507 | } | |
508 | } | |
509 | ||
20d695a9 | 510 | ret = kvm_arch_init_vcpu(cpu); |
d0a92b35 DDAG |
511 | if (ret < 0) { |
512 | error_setg_errno(errp, -ret, | |
513 | "kvm_init_vcpu: kvm_arch_init_vcpu failed (%lu)", | |
514 | kvm_arch_vcpu_id(cpu)); | |
515 | } | |
05330448 AL |
516 | err: |
517 | return ret; | |
518 | } | |
519 | ||
5832d1f2 AL |
520 | /* |
521 | * dirty pages logging control | |
522 | */ | |
25254bbc | 523 | |
d6ff5cbc | 524 | static int kvm_mem_flags(MemoryRegion *mr) |
25254bbc | 525 | { |
d6ff5cbc | 526 | bool readonly = mr->readonly || memory_region_is_romd(mr); |
235e8982 | 527 | int flags = 0; |
d6ff5cbc AJ |
528 | |
529 | if (memory_region_get_dirty_log_mask(mr) != 0) { | |
530 | flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
531 | } | |
235e8982 JJ |
532 | if (readonly && kvm_readonly_mem_allowed) { |
533 | flags |= KVM_MEM_READONLY; | |
534 | } | |
535 | return flags; | |
25254bbc MT |
536 | } |
537 | ||
36adac49 | 538 | /* Called with KVMMemoryListener.slots_lock held */ |
7bbda04c PB |
539 | static int kvm_slot_update_flags(KVMMemoryListener *kml, KVMSlot *mem, |
540 | MemoryRegion *mr) | |
5832d1f2 | 541 | { |
d6ff5cbc | 542 | mem->flags = kvm_mem_flags(mr); |
5832d1f2 | 543 | |
4495d6a7 | 544 | /* If nothing changed effectively, no need to issue ioctl */ |
6c090d4a | 545 | if (mem->flags == mem->old_flags) { |
25254bbc | 546 | return 0; |
4495d6a7 JK |
547 | } |
548 | ||
ea776d15 | 549 | kvm_slot_init_dirty_bitmap(mem); |
6c090d4a | 550 | return kvm_set_user_memory_region(kml, mem, false); |
5832d1f2 AL |
551 | } |
552 | ||
7bbda04c PB |
553 | static int kvm_section_update_flags(KVMMemoryListener *kml, |
554 | MemoryRegionSection *section) | |
25254bbc | 555 | { |
023ae9a8 | 556 | hwaddr start_addr, size, slot_size; |
343562e8 | 557 | KVMSlot *mem; |
36adac49 | 558 | int ret = 0; |
25254bbc | 559 | |
343562e8 DH |
560 | size = kvm_align_section(section, &start_addr); |
561 | if (!size) { | |
ea8cb1a8 | 562 | return 0; |
25254bbc | 563 | } |
343562e8 | 564 | |
a2f77862 | 565 | kvm_slots_lock(); |
36adac49 | 566 | |
023ae9a8 IM |
567 | while (size && !ret) { |
568 | slot_size = MIN(kvm_max_slot_size, size); | |
569 | mem = kvm_lookup_matching_slot(kml, start_addr, slot_size); | |
570 | if (!mem) { | |
571 | /* We don't have a slot if we want to trap every access. */ | |
572 | goto out; | |
573 | } | |
343562e8 | 574 | |
023ae9a8 IM |
575 | ret = kvm_slot_update_flags(kml, mem, section->mr); |
576 | start_addr += slot_size; | |
577 | size -= slot_size; | |
578 | } | |
36adac49 PX |
579 | |
580 | out: | |
a2f77862 | 581 | kvm_slots_unlock(); |
36adac49 | 582 | return ret; |
25254bbc MT |
583 | } |
584 | ||
a01672d3 | 585 | static void kvm_log_start(MemoryListener *listener, |
b2dfd71c PB |
586 | MemoryRegionSection *section, |
587 | int old, int new) | |
5832d1f2 | 588 | { |
7bbda04c | 589 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
590 | int r; |
591 | ||
b2dfd71c PB |
592 | if (old != 0) { |
593 | return; | |
594 | } | |
595 | ||
7bbda04c | 596 | r = kvm_section_update_flags(kml, section); |
a01672d3 AK |
597 | if (r < 0) { |
598 | abort(); | |
599 | } | |
5832d1f2 AL |
600 | } |
601 | ||
a01672d3 | 602 | static void kvm_log_stop(MemoryListener *listener, |
b2dfd71c PB |
603 | MemoryRegionSection *section, |
604 | int old, int new) | |
5832d1f2 | 605 | { |
7bbda04c | 606 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
607 | int r; |
608 | ||
b2dfd71c PB |
609 | if (new != 0) { |
610 | return; | |
611 | } | |
612 | ||
7bbda04c | 613 | r = kvm_section_update_flags(kml, section); |
a01672d3 AK |
614 | if (r < 0) { |
615 | abort(); | |
616 | } | |
5832d1f2 AL |
617 | } |
618 | ||
8369e01c | 619 | /* get kvm's dirty pages bitmap and update qemu's */ |
2c20b27e | 620 | static void kvm_slot_sync_dirty_pages(KVMSlot *slot) |
96c1606b | 621 | { |
2c20b27e PX |
622 | ram_addr_t start = slot->ram_start_offset; |
623 | ram_addr_t pages = slot->memory_size / qemu_real_host_page_size; | |
5ff7fb77 | 624 | |
2c20b27e | 625 | cpu_physical_memory_set_dirty_lebitmap(slot->dirty_bmap, start, pages); |
96c1606b AG |
626 | } |
627 | ||
b4420f19 PX |
628 | static void kvm_slot_reset_dirty_pages(KVMSlot *slot) |
629 | { | |
630 | memset(slot->dirty_bmap, 0, slot->dirty_bmap_size); | |
631 | } | |
632 | ||
8369e01c MT |
633 | #define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) |
634 | ||
9b3a31c7 | 635 | /* Allocate the dirty bitmap for a slot */ |
ea776d15 | 636 | static void kvm_slot_init_dirty_bitmap(KVMSlot *mem) |
9b3a31c7 | 637 | { |
ea776d15 PX |
638 | if (!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) || mem->dirty_bmap) { |
639 | return; | |
640 | } | |
641 | ||
9b3a31c7 DDAG |
642 | /* |
643 | * XXX bad kernel interface alert | |
644 | * For dirty bitmap, kernel allocates array of size aligned to | |
645 | * bits-per-long. But for case when the kernel is 64bits and | |
646 | * the userspace is 32bits, userspace can't align to the same | |
647 | * bits-per-long, since sizeof(long) is different between kernel | |
648 | * and user space. This way, userspace will provide buffer which | |
649 | * may be 4 bytes less than the kernel will use, resulting in | |
650 | * userspace memory corruption (which is not detectable by valgrind | |
651 | * too, in most cases). | |
652 | * So for now, let's align to 64 instead of HOST_LONG_BITS here, in | |
653 | * a hope that sizeof(long) won't become >8 any time soon. | |
e0a8f993 KZ |
654 | * |
655 | * Note: the granule of kvm dirty log is qemu_real_host_page_size. | |
656 | * And mem->memory_size is aligned to it (otherwise this mem can't | |
657 | * be registered to KVM). | |
9b3a31c7 | 658 | */ |
e0a8f993 | 659 | hwaddr bitmap_size = ALIGN(mem->memory_size / qemu_real_host_page_size, |
9b3a31c7 DDAG |
660 | /*HOST_LONG_BITS*/ 64) / 8; |
661 | mem->dirty_bmap = g_malloc0(bitmap_size); | |
563d32ba | 662 | mem->dirty_bmap_size = bitmap_size; |
9b3a31c7 DDAG |
663 | } |
664 | ||
e65e5f50 PX |
665 | /* |
666 | * Sync dirty bitmap from kernel to KVMSlot.dirty_bmap, return true if | |
667 | * succeeded, false otherwise | |
668 | */ | |
669 | static bool kvm_slot_get_dirty_log(KVMState *s, KVMSlot *slot) | |
670 | { | |
671 | struct kvm_dirty_log d = {}; | |
672 | int ret; | |
673 | ||
674 | d.dirty_bitmap = slot->dirty_bmap; | |
675 | d.slot = slot->slot | (slot->as_id << 16); | |
676 | ret = kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d); | |
677 | ||
678 | if (ret == -ENOENT) { | |
679 | /* kernel does not have dirty bitmap in this slot */ | |
680 | ret = 0; | |
681 | } | |
682 | if (ret) { | |
683 | error_report_once("%s: KVM_GET_DIRTY_LOG failed with %d", | |
684 | __func__, ret); | |
685 | } | |
686 | return ret == 0; | |
687 | } | |
688 | ||
b4420f19 PX |
689 | /* Should be with all slots_lock held for the address spaces. */ |
690 | static void kvm_dirty_ring_mark_page(KVMState *s, uint32_t as_id, | |
691 | uint32_t slot_id, uint64_t offset) | |
692 | { | |
693 | KVMMemoryListener *kml; | |
694 | KVMSlot *mem; | |
695 | ||
696 | if (as_id >= s->nr_as) { | |
697 | return; | |
698 | } | |
699 | ||
700 | kml = s->as[as_id].ml; | |
701 | mem = &kml->slots[slot_id]; | |
702 | ||
703 | if (!mem->memory_size || offset >= | |
704 | (mem->memory_size / qemu_real_host_page_size)) { | |
705 | return; | |
706 | } | |
707 | ||
708 | set_bit(offset, mem->dirty_bmap); | |
709 | } | |
710 | ||
711 | static bool dirty_gfn_is_dirtied(struct kvm_dirty_gfn *gfn) | |
712 | { | |
713 | return gfn->flags == KVM_DIRTY_GFN_F_DIRTY; | |
714 | } | |
715 | ||
716 | static void dirty_gfn_set_collected(struct kvm_dirty_gfn *gfn) | |
717 | { | |
718 | gfn->flags = KVM_DIRTY_GFN_F_RESET; | |
719 | } | |
720 | ||
721 | /* | |
722 | * Should be with all slots_lock held for the address spaces. It returns the | |
723 | * dirty page we've collected on this dirty ring. | |
724 | */ | |
725 | static uint32_t kvm_dirty_ring_reap_one(KVMState *s, CPUState *cpu) | |
726 | { | |
727 | struct kvm_dirty_gfn *dirty_gfns = cpu->kvm_dirty_gfns, *cur; | |
728 | uint32_t ring_size = s->kvm_dirty_ring_size; | |
729 | uint32_t count = 0, fetch = cpu->kvm_fetch_index; | |
730 | ||
731 | assert(dirty_gfns && ring_size); | |
732 | trace_kvm_dirty_ring_reap_vcpu(cpu->cpu_index); | |
733 | ||
734 | while (true) { | |
735 | cur = &dirty_gfns[fetch % ring_size]; | |
736 | if (!dirty_gfn_is_dirtied(cur)) { | |
737 | break; | |
738 | } | |
739 | kvm_dirty_ring_mark_page(s, cur->slot >> 16, cur->slot & 0xffff, | |
740 | cur->offset); | |
741 | dirty_gfn_set_collected(cur); | |
742 | trace_kvm_dirty_ring_page(cpu->cpu_index, fetch, cur->offset); | |
743 | fetch++; | |
744 | count++; | |
745 | } | |
746 | cpu->kvm_fetch_index = fetch; | |
7786ae40 | 747 | cpu->dirty_pages += count; |
b4420f19 PX |
748 | |
749 | return count; | |
750 | } | |
751 | ||
752 | /* Must be with slots_lock held */ | |
753 | static uint64_t kvm_dirty_ring_reap_locked(KVMState *s) | |
754 | { | |
755 | int ret; | |
756 | CPUState *cpu; | |
757 | uint64_t total = 0; | |
758 | int64_t stamp; | |
759 | ||
760 | stamp = get_clock(); | |
761 | ||
762 | CPU_FOREACH(cpu) { | |
763 | total += kvm_dirty_ring_reap_one(s, cpu); | |
764 | } | |
765 | ||
766 | if (total) { | |
767 | ret = kvm_vm_ioctl(s, KVM_RESET_DIRTY_RINGS); | |
768 | assert(ret == total); | |
769 | } | |
770 | ||
771 | stamp = get_clock() - stamp; | |
772 | ||
773 | if (total) { | |
774 | trace_kvm_dirty_ring_reap(total, stamp / 1000); | |
775 | } | |
776 | ||
777 | return total; | |
778 | } | |
779 | ||
780 | /* | |
781 | * Currently for simplicity, we must hold BQL before calling this. We can | |
782 | * consider to drop the BQL if we're clear with all the race conditions. | |
783 | */ | |
784 | static uint64_t kvm_dirty_ring_reap(KVMState *s) | |
785 | { | |
786 | uint64_t total; | |
787 | ||
788 | /* | |
789 | * We need to lock all kvm slots for all address spaces here, | |
790 | * because: | |
791 | * | |
792 | * (1) We need to mark dirty for dirty bitmaps in multiple slots | |
793 | * and for tons of pages, so it's better to take the lock here | |
794 | * once rather than once per page. And more importantly, | |
795 | * | |
796 | * (2) We must _NOT_ publish dirty bits to the other threads | |
797 | * (e.g., the migration thread) via the kvm memory slot dirty | |
798 | * bitmaps before correctly re-protect those dirtied pages. | |
799 | * Otherwise we can have potential risk of data corruption if | |
800 | * the page data is read in the other thread before we do | |
801 | * reset below. | |
802 | */ | |
803 | kvm_slots_lock(); | |
804 | total = kvm_dirty_ring_reap_locked(s); | |
805 | kvm_slots_unlock(); | |
806 | ||
807 | return total; | |
808 | } | |
809 | ||
810 | static void do_kvm_cpu_synchronize_kick(CPUState *cpu, run_on_cpu_data arg) | |
811 | { | |
812 | /* No need to do anything */ | |
813 | } | |
814 | ||
815 | /* | |
816 | * Kick all vcpus out in a synchronized way. When returned, we | |
817 | * guarantee that every vcpu has been kicked and at least returned to | |
818 | * userspace once. | |
819 | */ | |
820 | static void kvm_cpu_synchronize_kick_all(void) | |
821 | { | |
822 | CPUState *cpu; | |
823 | ||
824 | CPU_FOREACH(cpu) { | |
825 | run_on_cpu(cpu, do_kvm_cpu_synchronize_kick, RUN_ON_CPU_NULL); | |
826 | } | |
827 | } | |
828 | ||
829 | /* | |
830 | * Flush all the existing dirty pages to the KVM slot buffers. When | |
831 | * this call returns, we guarantee that all the touched dirty pages | |
832 | * before calling this function have been put into the per-kvmslot | |
833 | * dirty bitmap. | |
834 | * | |
835 | * This function must be called with BQL held. | |
836 | */ | |
837 | static void kvm_dirty_ring_flush(void) | |
838 | { | |
839 | trace_kvm_dirty_ring_flush(0); | |
840 | /* | |
841 | * The function needs to be serialized. Since this function | |
842 | * should always be with BQL held, serialization is guaranteed. | |
843 | * However, let's be sure of it. | |
844 | */ | |
845 | assert(qemu_mutex_iothread_locked()); | |
846 | /* | |
847 | * First make sure to flush the hardware buffers by kicking all | |
848 | * vcpus out in a synchronous way. | |
849 | */ | |
850 | kvm_cpu_synchronize_kick_all(); | |
851 | kvm_dirty_ring_reap(kvm_state); | |
852 | trace_kvm_dirty_ring_flush(1); | |
853 | } | |
854 | ||
5832d1f2 | 855 | /** |
4a12a11a | 856 | * kvm_physical_sync_dirty_bitmap - Sync dirty bitmap from kernel space |
5832d1f2 | 857 | * |
4a12a11a PX |
858 | * This function will first try to fetch dirty bitmap from the kernel, |
859 | * and then updates qemu's dirty bitmap. | |
860 | * | |
36adac49 PX |
861 | * NOTE: caller must be with kml->slots_lock held. |
862 | * | |
4a12a11a PX |
863 | * @kml: the KVM memory listener object |
864 | * @section: the memory section to sync the dirty bitmap with | |
5832d1f2 | 865 | */ |
e65e5f50 PX |
866 | static void kvm_physical_sync_dirty_bitmap(KVMMemoryListener *kml, |
867 | MemoryRegionSection *section) | |
5832d1f2 AL |
868 | { |
869 | KVMState *s = kvm_state; | |
151f7749 | 870 | KVMSlot *mem; |
67548f09 | 871 | hwaddr start_addr, size; |
2c20b27e | 872 | hwaddr slot_size; |
67548f09 DH |
873 | |
874 | size = kvm_align_section(section, &start_addr); | |
023ae9a8 | 875 | while (size) { |
023ae9a8 IM |
876 | slot_size = MIN(kvm_max_slot_size, size); |
877 | mem = kvm_lookup_matching_slot(kml, start_addr, slot_size); | |
67548f09 | 878 | if (!mem) { |
e377e87c | 879 | /* We don't have a slot if we want to trap every access. */ |
e65e5f50 | 880 | return; |
151f7749 | 881 | } |
e65e5f50 | 882 | if (kvm_slot_get_dirty_log(s, mem)) { |
2c20b27e | 883 | kvm_slot_sync_dirty_pages(mem); |
151f7749 | 884 | } |
023ae9a8 IM |
885 | start_addr += slot_size; |
886 | size -= slot_size; | |
5832d1f2 | 887 | } |
5832d1f2 AL |
888 | } |
889 | ||
ff4aa114 PX |
890 | /* Alignment requirement for KVM_CLEAR_DIRTY_LOG - 64 pages */ |
891 | #define KVM_CLEAR_LOG_SHIFT 6 | |
892 | #define KVM_CLEAR_LOG_ALIGN (qemu_real_host_page_size << KVM_CLEAR_LOG_SHIFT) | |
893 | #define KVM_CLEAR_LOG_MASK (-KVM_CLEAR_LOG_ALIGN) | |
894 | ||
4222147d PB |
895 | static int kvm_log_clear_one_slot(KVMSlot *mem, int as_id, uint64_t start, |
896 | uint64_t size) | |
ff4aa114 PX |
897 | { |
898 | KVMState *s = kvm_state; | |
4222147d | 899 | uint64_t end, bmap_start, start_delta, bmap_npages; |
ff4aa114 | 900 | struct kvm_clear_dirty_log d; |
ff4aa114 | 901 | unsigned long *bmap_clear = NULL, psize = qemu_real_host_page_size; |
4222147d | 902 | int ret; |
ff4aa114 PX |
903 | |
904 | /* | |
905 | * We need to extend either the start or the size or both to | |
906 | * satisfy the KVM interface requirement. Firstly, do the start | |
907 | * page alignment on 64 host pages | |
908 | */ | |
84516e5b PB |
909 | bmap_start = start & KVM_CLEAR_LOG_MASK; |
910 | start_delta = start - bmap_start; | |
ff4aa114 PX |
911 | bmap_start /= psize; |
912 | ||
913 | /* | |
914 | * The kernel interface has restriction on the size too, that either: | |
915 | * | |
916 | * (1) the size is 64 host pages aligned (just like the start), or | |
917 | * (2) the size fills up until the end of the KVM memslot. | |
918 | */ | |
919 | bmap_npages = DIV_ROUND_UP(size + start_delta, KVM_CLEAR_LOG_ALIGN) | |
920 | << KVM_CLEAR_LOG_SHIFT; | |
921 | end = mem->memory_size / psize; | |
922 | if (bmap_npages > end - bmap_start) { | |
923 | bmap_npages = end - bmap_start; | |
924 | } | |
925 | start_delta /= psize; | |
926 | ||
927 | /* | |
928 | * Prepare the bitmap to clear dirty bits. Here we must guarantee | |
929 | * that we won't clear any unknown dirty bits otherwise we might | |
930 | * accidentally clear some set bits which are not yet synced from | |
931 | * the kernel into QEMU's bitmap, then we'll lose track of the | |
932 | * guest modifications upon those pages (which can directly lead | |
933 | * to guest data loss or panic after migration). | |
934 | * | |
935 | * Layout of the KVMSlot.dirty_bmap: | |
936 | * | |
937 | * |<-------- bmap_npages -----------..>| | |
938 | * [1] | |
939 | * start_delta size | |
940 | * |----------------|-------------|------------------|------------| | |
941 | * ^ ^ ^ ^ | |
942 | * | | | | | |
943 | * start bmap_start (start) end | |
944 | * of memslot of memslot | |
945 | * | |
946 | * [1] bmap_npages can be aligned to either 64 pages or the end of slot | |
947 | */ | |
948 | ||
949 | assert(bmap_start % BITS_PER_LONG == 0); | |
950 | /* We should never do log_clear before log_sync */ | |
951 | assert(mem->dirty_bmap); | |
4054adbd | 952 | if (start_delta || bmap_npages - size / psize) { |
ff4aa114 PX |
953 | /* Slow path - we need to manipulate a temp bitmap */ |
954 | bmap_clear = bitmap_new(bmap_npages); | |
955 | bitmap_copy_with_src_offset(bmap_clear, mem->dirty_bmap, | |
956 | bmap_start, start_delta + size / psize); | |
957 | /* | |
958 | * We need to fill the holes at start because that was not | |
959 | * specified by the caller and we extended the bitmap only for | |
960 | * 64 pages alignment | |
961 | */ | |
962 | bitmap_clear(bmap_clear, 0, start_delta); | |
963 | d.dirty_bitmap = bmap_clear; | |
964 | } else { | |
4054adbd ZY |
965 | /* |
966 | * Fast path - both start and size align well with BITS_PER_LONG | |
967 | * (or the end of memory slot) | |
968 | */ | |
ff4aa114 PX |
969 | d.dirty_bitmap = mem->dirty_bmap + BIT_WORD(bmap_start); |
970 | } | |
971 | ||
972 | d.first_page = bmap_start; | |
973 | /* It should never overflow. If it happens, say something */ | |
974 | assert(bmap_npages <= UINT32_MAX); | |
975 | d.num_pages = bmap_npages; | |
4222147d | 976 | d.slot = mem->slot | (as_id << 16); |
ff4aa114 | 977 | |
38e0b790 TH |
978 | ret = kvm_vm_ioctl(s, KVM_CLEAR_DIRTY_LOG, &d); |
979 | if (ret < 0 && ret != -ENOENT) { | |
ff4aa114 PX |
980 | error_report("%s: KVM_CLEAR_DIRTY_LOG failed, slot=%d, " |
981 | "start=0x%"PRIx64", size=0x%"PRIx32", errno=%d", | |
982 | __func__, d.slot, (uint64_t)d.first_page, | |
983 | (uint32_t)d.num_pages, ret); | |
984 | } else { | |
985 | ret = 0; | |
986 | trace_kvm_clear_dirty_log(d.slot, d.first_page, d.num_pages); | |
987 | } | |
988 | ||
989 | /* | |
990 | * After we have updated the remote dirty bitmap, we update the | |
991 | * cached bitmap as well for the memslot, then if another user | |
992 | * clears the same region we know we shouldn't clear it again on | |
993 | * the remote otherwise it's data loss as well. | |
994 | */ | |
995 | bitmap_clear(mem->dirty_bmap, bmap_start + start_delta, | |
996 | size / psize); | |
997 | /* This handles the NULL case well */ | |
998 | g_free(bmap_clear); | |
4222147d PB |
999 | return ret; |
1000 | } | |
1001 | ||
1002 | ||
1003 | /** | |
1004 | * kvm_physical_log_clear - Clear the kernel's dirty bitmap for range | |
1005 | * | |
1006 | * NOTE: this will be a no-op if we haven't enabled manual dirty log | |
1007 | * protection in the host kernel because in that case this operation | |
1008 | * will be done within log_sync(). | |
1009 | * | |
1010 | * @kml: the kvm memory listener | |
1011 | * @section: the memory range to clear dirty bitmap | |
1012 | */ | |
1013 | static int kvm_physical_log_clear(KVMMemoryListener *kml, | |
1014 | MemoryRegionSection *section) | |
1015 | { | |
1016 | KVMState *s = kvm_state; | |
84516e5b PB |
1017 | uint64_t start, size, offset, count; |
1018 | KVMSlot *mem; | |
87287ac0 | 1019 | int ret = 0, i; |
4222147d PB |
1020 | |
1021 | if (!s->manual_dirty_log_protect) { | |
1022 | /* No need to do explicit clear */ | |
87287ac0 | 1023 | return ret; |
4222147d PB |
1024 | } |
1025 | ||
1026 | start = section->offset_within_address_space; | |
1027 | size = int128_get64(section->size); | |
1028 | ||
1029 | if (!size) { | |
1030 | /* Nothing more we can do... */ | |
87287ac0 | 1031 | return ret; |
4222147d PB |
1032 | } |
1033 | ||
a2f77862 | 1034 | kvm_slots_lock(); |
4222147d | 1035 | |
4222147d PB |
1036 | for (i = 0; i < s->nr_slots; i++) { |
1037 | mem = &kml->slots[i]; | |
84516e5b PB |
1038 | /* Discard slots that are empty or do not overlap the section */ |
1039 | if (!mem->memory_size || | |
1040 | mem->start_addr > start + size - 1 || | |
1041 | start > mem->start_addr + mem->memory_size - 1) { | |
1042 | continue; | |
1043 | } | |
1044 | ||
1045 | if (start >= mem->start_addr) { | |
1046 | /* The slot starts before section or is aligned to it. */ | |
1047 | offset = start - mem->start_addr; | |
1048 | count = MIN(mem->memory_size - offset, size); | |
1049 | } else { | |
1050 | /* The slot starts after section. */ | |
1051 | offset = 0; | |
1052 | count = MIN(mem->memory_size, size - (mem->start_addr - start)); | |
1053 | } | |
1054 | ret = kvm_log_clear_one_slot(mem, kml->as_id, offset, count); | |
1055 | if (ret < 0) { | |
4222147d PB |
1056 | break; |
1057 | } | |
1058 | } | |
1059 | ||
a2f77862 | 1060 | kvm_slots_unlock(); |
ff4aa114 PX |
1061 | |
1062 | return ret; | |
1063 | } | |
1064 | ||
95d2994a AK |
1065 | static void kvm_coalesce_mmio_region(MemoryListener *listener, |
1066 | MemoryRegionSection *secion, | |
a8170e5e | 1067 | hwaddr start, hwaddr size) |
f65ed4c1 | 1068 | { |
f65ed4c1 AL |
1069 | KVMState *s = kvm_state; |
1070 | ||
1071 | if (s->coalesced_mmio) { | |
1072 | struct kvm_coalesced_mmio_zone zone; | |
1073 | ||
1074 | zone.addr = start; | |
1075 | zone.size = size; | |
7e680753 | 1076 | zone.pad = 0; |
f65ed4c1 | 1077 | |
95d2994a | 1078 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 1079 | } |
f65ed4c1 AL |
1080 | } |
1081 | ||
95d2994a AK |
1082 | static void kvm_uncoalesce_mmio_region(MemoryListener *listener, |
1083 | MemoryRegionSection *secion, | |
a8170e5e | 1084 | hwaddr start, hwaddr size) |
f65ed4c1 | 1085 | { |
f65ed4c1 AL |
1086 | KVMState *s = kvm_state; |
1087 | ||
1088 | if (s->coalesced_mmio) { | |
1089 | struct kvm_coalesced_mmio_zone zone; | |
1090 | ||
1091 | zone.addr = start; | |
1092 | zone.size = size; | |
7e680753 | 1093 | zone.pad = 0; |
f65ed4c1 | 1094 | |
95d2994a | 1095 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 1096 | } |
f65ed4c1 AL |
1097 | } |
1098 | ||
e6d34aee PH |
1099 | static void kvm_coalesce_pio_add(MemoryListener *listener, |
1100 | MemoryRegionSection *section, | |
1101 | hwaddr start, hwaddr size) | |
1102 | { | |
1103 | KVMState *s = kvm_state; | |
1104 | ||
1105 | if (s->coalesced_pio) { | |
1106 | struct kvm_coalesced_mmio_zone zone; | |
1107 | ||
1108 | zone.addr = start; | |
1109 | zone.size = size; | |
1110 | zone.pio = 1; | |
1111 | ||
1112 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); | |
1113 | } | |
1114 | } | |
1115 | ||
1116 | static void kvm_coalesce_pio_del(MemoryListener *listener, | |
1117 | MemoryRegionSection *section, | |
1118 | hwaddr start, hwaddr size) | |
1119 | { | |
1120 | KVMState *s = kvm_state; | |
1121 | ||
1122 | if (s->coalesced_pio) { | |
1123 | struct kvm_coalesced_mmio_zone zone; | |
1124 | ||
1125 | zone.addr = start; | |
1126 | zone.size = size; | |
1127 | zone.pio = 1; | |
1128 | ||
1129 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); | |
1130 | } | |
1131 | } | |
1132 | ||
1133 | static MemoryListener kvm_coalesced_pio_listener = { | |
142518bd | 1134 | .name = "kvm-coalesced-pio", |
e6d34aee PH |
1135 | .coalesced_io_add = kvm_coalesce_pio_add, |
1136 | .coalesced_io_del = kvm_coalesce_pio_del, | |
1137 | }; | |
1138 | ||
ad7b8b33 AL |
1139 | int kvm_check_extension(KVMState *s, unsigned int extension) |
1140 | { | |
1141 | int ret; | |
1142 | ||
1143 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
1144 | if (ret < 0) { | |
1145 | ret = 0; | |
1146 | } | |
1147 | ||
1148 | return ret; | |
1149 | } | |
1150 | ||
7d0a07fa AG |
1151 | int kvm_vm_check_extension(KVMState *s, unsigned int extension) |
1152 | { | |
1153 | int ret; | |
1154 | ||
1155 | ret = kvm_vm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
1156 | if (ret < 0) { | |
1157 | /* VM wide version not implemented, use global one instead */ | |
1158 | ret = kvm_check_extension(s, extension); | |
1159 | } | |
1160 | ||
1161 | return ret; | |
1162 | } | |
1163 | ||
6b552b9b DG |
1164 | typedef struct HWPoisonPage { |
1165 | ram_addr_t ram_addr; | |
1166 | QLIST_ENTRY(HWPoisonPage) list; | |
1167 | } HWPoisonPage; | |
1168 | ||
1169 | static QLIST_HEAD(, HWPoisonPage) hwpoison_page_list = | |
1170 | QLIST_HEAD_INITIALIZER(hwpoison_page_list); | |
1171 | ||
1172 | static void kvm_unpoison_all(void *param) | |
1173 | { | |
1174 | HWPoisonPage *page, *next_page; | |
1175 | ||
1176 | QLIST_FOREACH_SAFE(page, &hwpoison_page_list, list, next_page) { | |
1177 | QLIST_REMOVE(page, list); | |
1178 | qemu_ram_remap(page->ram_addr, TARGET_PAGE_SIZE); | |
1179 | g_free(page); | |
1180 | } | |
1181 | } | |
1182 | ||
1183 | void kvm_hwpoison_page_add(ram_addr_t ram_addr) | |
1184 | { | |
1185 | HWPoisonPage *page; | |
1186 | ||
1187 | QLIST_FOREACH(page, &hwpoison_page_list, list) { | |
1188 | if (page->ram_addr == ram_addr) { | |
1189 | return; | |
1190 | } | |
1191 | } | |
1192 | page = g_new(HWPoisonPage, 1); | |
1193 | page->ram_addr = ram_addr; | |
1194 | QLIST_INSERT_HEAD(&hwpoison_page_list, page, list); | |
1195 | } | |
1196 | ||
b680c5ba GK |
1197 | static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size) |
1198 | { | |
1199 | #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN) | |
1200 | /* The kernel expects ioeventfd values in HOST_WORDS_BIGENDIAN | |
1201 | * endianness, but the memory core hands them in target endianness. | |
1202 | * For example, PPC is always treated as big-endian even if running | |
1203 | * on KVM and on PPC64LE. Correct here. | |
1204 | */ | |
1205 | switch (size) { | |
1206 | case 2: | |
1207 | val = bswap16(val); | |
1208 | break; | |
1209 | case 4: | |
1210 | val = bswap32(val); | |
1211 | break; | |
1212 | } | |
1213 | #endif | |
1214 | return val; | |
1215 | } | |
1216 | ||
584f2be7 | 1217 | static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val, |
41cb62c2 | 1218 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
1219 | { |
1220 | int ret; | |
03a96b83 TH |
1221 | struct kvm_ioeventfd iofd = { |
1222 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, | |
1223 | .addr = addr, | |
1224 | .len = size, | |
1225 | .flags = 0, | |
1226 | .fd = fd, | |
1227 | }; | |
500ffd4a | 1228 | |
876d16cd DDAG |
1229 | trace_kvm_set_ioeventfd_mmio(fd, (uint64_t)addr, val, assign, size, |
1230 | datamatch); | |
500ffd4a MT |
1231 | if (!kvm_enabled()) { |
1232 | return -ENOSYS; | |
1233 | } | |
1234 | ||
41cb62c2 MT |
1235 | if (datamatch) { |
1236 | iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
1237 | } | |
500ffd4a MT |
1238 | if (!assign) { |
1239 | iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
1240 | } | |
1241 | ||
1242 | ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); | |
1243 | ||
1244 | if (ret < 0) { | |
1245 | return -errno; | |
1246 | } | |
1247 | ||
1248 | return 0; | |
1249 | } | |
1250 | ||
44c3f8f7 | 1251 | static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val, |
41cb62c2 | 1252 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
1253 | { |
1254 | struct kvm_ioeventfd kick = { | |
b680c5ba | 1255 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, |
500ffd4a | 1256 | .addr = addr, |
41cb62c2 | 1257 | .flags = KVM_IOEVENTFD_FLAG_PIO, |
44c3f8f7 | 1258 | .len = size, |
500ffd4a MT |
1259 | .fd = fd, |
1260 | }; | |
1261 | int r; | |
876d16cd | 1262 | trace_kvm_set_ioeventfd_pio(fd, addr, val, assign, size, datamatch); |
500ffd4a MT |
1263 | if (!kvm_enabled()) { |
1264 | return -ENOSYS; | |
1265 | } | |
41cb62c2 MT |
1266 | if (datamatch) { |
1267 | kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
1268 | } | |
500ffd4a MT |
1269 | if (!assign) { |
1270 | kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
1271 | } | |
1272 | r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); | |
1273 | if (r < 0) { | |
1274 | return r; | |
1275 | } | |
1276 | return 0; | |
1277 | } | |
1278 | ||
1279 | ||
d2f2b8a7 SH |
1280 | static int kvm_check_many_ioeventfds(void) |
1281 | { | |
d0dcac83 SH |
1282 | /* Userspace can use ioeventfd for io notification. This requires a host |
1283 | * that supports eventfd(2) and an I/O thread; since eventfd does not | |
1284 | * support SIGIO it cannot interrupt the vcpu. | |
1285 | * | |
1286 | * Older kernels have a 6 device limit on the KVM io bus. Find out so we | |
d2f2b8a7 SH |
1287 | * can avoid creating too many ioeventfds. |
1288 | */ | |
12d4536f | 1289 | #if defined(CONFIG_EVENTFD) |
d2f2b8a7 SH |
1290 | int ioeventfds[7]; |
1291 | int i, ret = 0; | |
1292 | for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { | |
1293 | ioeventfds[i] = eventfd(0, EFD_CLOEXEC); | |
1294 | if (ioeventfds[i] < 0) { | |
1295 | break; | |
1296 | } | |
41cb62c2 | 1297 | ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true); |
d2f2b8a7 SH |
1298 | if (ret < 0) { |
1299 | close(ioeventfds[i]); | |
1300 | break; | |
1301 | } | |
1302 | } | |
1303 | ||
1304 | /* Decide whether many devices are supported or not */ | |
1305 | ret = i == ARRAY_SIZE(ioeventfds); | |
1306 | ||
1307 | while (i-- > 0) { | |
41cb62c2 | 1308 | kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true); |
d2f2b8a7 SH |
1309 | close(ioeventfds[i]); |
1310 | } | |
1311 | return ret; | |
1312 | #else | |
1313 | return 0; | |
1314 | #endif | |
1315 | } | |
1316 | ||
94a8d39a JK |
1317 | static const KVMCapabilityInfo * |
1318 | kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list) | |
1319 | { | |
1320 | while (list->name) { | |
1321 | if (!kvm_check_extension(s, list->value)) { | |
1322 | return list; | |
1323 | } | |
1324 | list++; | |
1325 | } | |
1326 | return NULL; | |
1327 | } | |
1328 | ||
023ae9a8 IM |
1329 | void kvm_set_max_memslot_size(hwaddr max_slot_size) |
1330 | { | |
1331 | g_assert( | |
1332 | ROUND_UP(max_slot_size, qemu_real_host_page_size) == max_slot_size | |
1333 | ); | |
1334 | kvm_max_slot_size = max_slot_size; | |
1335 | } | |
1336 | ||
7bbda04c PB |
1337 | static void kvm_set_phys_mem(KVMMemoryListener *kml, |
1338 | MemoryRegionSection *section, bool add) | |
46dbef6a | 1339 | { |
f357f564 | 1340 | KVMSlot *mem; |
46dbef6a | 1341 | int err; |
a01672d3 | 1342 | MemoryRegion *mr = section->mr; |
235e8982 | 1343 | bool writeable = !mr->readonly && !mr->rom_device; |
2c20b27e PX |
1344 | hwaddr start_addr, size, slot_size, mr_offset; |
1345 | ram_addr_t ram_start_offset; | |
5ea69c2e | 1346 | void *ram; |
46dbef6a | 1347 | |
a01672d3 | 1348 | if (!memory_region_is_ram(mr)) { |
235e8982 JJ |
1349 | if (writeable || !kvm_readonly_mem_allowed) { |
1350 | return; | |
1351 | } else if (!mr->romd_mode) { | |
1352 | /* If the memory device is not in romd_mode, then we actually want | |
1353 | * to remove the kvm memory slot so all accesses will trap. */ | |
1354 | add = false; | |
1355 | } | |
9f213ed9 AK |
1356 | } |
1357 | ||
5ea69c2e DH |
1358 | size = kvm_align_section(section, &start_addr); |
1359 | if (!size) { | |
1360 | return; | |
1361 | } | |
1362 | ||
2c20b27e PX |
1363 | /* The offset of the kvmslot within the memory region */ |
1364 | mr_offset = section->offset_within_region + start_addr - | |
1365 | section->offset_within_address_space; | |
1366 | ||
1367 | /* use aligned delta to align the ram address and offset */ | |
1368 | ram = memory_region_get_ram_ptr(mr) + mr_offset; | |
1369 | ram_start_offset = memory_region_get_ram_addr(mr) + mr_offset; | |
a01672d3 | 1370 | |
a2f77862 | 1371 | kvm_slots_lock(); |
36adac49 | 1372 | |
f357f564 | 1373 | if (!add) { |
023ae9a8 IM |
1374 | do { |
1375 | slot_size = MIN(kvm_max_slot_size, size); | |
1376 | mem = kvm_lookup_matching_slot(kml, start_addr, slot_size); | |
1377 | if (!mem) { | |
1378 | goto out; | |
1379 | } | |
1380 | if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { | |
b4420f19 PX |
1381 | /* |
1382 | * NOTE: We should be aware of the fact that here we're only | |
1383 | * doing a best effort to sync dirty bits. No matter whether | |
1384 | * we're using dirty log or dirty ring, we ignored two facts: | |
1385 | * | |
1386 | * (1) dirty bits can reside in hardware buffers (PML) | |
1387 | * | |
1388 | * (2) after we collected dirty bits here, pages can be dirtied | |
1389 | * again before we do the final KVM_SET_USER_MEMORY_REGION to | |
1390 | * remove the slot. | |
1391 | * | |
1392 | * Not easy. Let's cross the fingers until it's fixed. | |
1393 | */ | |
1394 | if (kvm_state->kvm_dirty_ring_size) { | |
1395 | kvm_dirty_ring_reap_locked(kvm_state); | |
1396 | } else { | |
1397 | kvm_slot_get_dirty_log(kvm_state, mem); | |
1398 | } | |
29b7e8be | 1399 | kvm_slot_sync_dirty_pages(mem); |
023ae9a8 | 1400 | } |
3fbffb62 | 1401 | |
023ae9a8 IM |
1402 | /* unregister the slot */ |
1403 | g_free(mem->dirty_bmap); | |
1404 | mem->dirty_bmap = NULL; | |
1405 | mem->memory_size = 0; | |
1406 | mem->flags = 0; | |
1407 | err = kvm_set_user_memory_region(kml, mem, false); | |
1408 | if (err) { | |
1409 | fprintf(stderr, "%s: error unregistering slot: %s\n", | |
1410 | __func__, strerror(-err)); | |
1411 | abort(); | |
1412 | } | |
1413 | start_addr += slot_size; | |
1414 | size -= slot_size; | |
1415 | } while (size); | |
36adac49 | 1416 | goto out; |
46dbef6a MT |
1417 | } |
1418 | ||
f357f564 | 1419 | /* register the new slot */ |
023ae9a8 IM |
1420 | do { |
1421 | slot_size = MIN(kvm_max_slot_size, size); | |
1422 | mem = kvm_alloc_slot(kml); | |
e65e5f50 | 1423 | mem->as_id = kml->as_id; |
023ae9a8 IM |
1424 | mem->memory_size = slot_size; |
1425 | mem->start_addr = start_addr; | |
2c20b27e | 1426 | mem->ram_start_offset = ram_start_offset; |
023ae9a8 IM |
1427 | mem->ram = ram; |
1428 | mem->flags = kvm_mem_flags(mr); | |
ea776d15 | 1429 | kvm_slot_init_dirty_bitmap(mem); |
023ae9a8 IM |
1430 | err = kvm_set_user_memory_region(kml, mem, true); |
1431 | if (err) { | |
1432 | fprintf(stderr, "%s: error registering slot: %s\n", __func__, | |
1433 | strerror(-err)); | |
1434 | abort(); | |
1435 | } | |
1436 | start_addr += slot_size; | |
2c20b27e | 1437 | ram_start_offset += slot_size; |
023ae9a8 IM |
1438 | ram += slot_size; |
1439 | size -= slot_size; | |
1440 | } while (size); | |
36adac49 PX |
1441 | |
1442 | out: | |
a2f77862 | 1443 | kvm_slots_unlock(); |
46dbef6a MT |
1444 | } |
1445 | ||
b4420f19 PX |
1446 | static void *kvm_dirty_ring_reaper_thread(void *data) |
1447 | { | |
1448 | KVMState *s = data; | |
1449 | struct KVMDirtyRingReaper *r = &s->reaper; | |
1450 | ||
1451 | rcu_register_thread(); | |
1452 | ||
1453 | trace_kvm_dirty_ring_reaper("init"); | |
1454 | ||
1455 | while (true) { | |
1456 | r->reaper_state = KVM_DIRTY_RING_REAPER_WAIT; | |
1457 | trace_kvm_dirty_ring_reaper("wait"); | |
1458 | /* | |
1459 | * TODO: provide a smarter timeout rather than a constant? | |
1460 | */ | |
1461 | sleep(1); | |
1462 | ||
1463 | trace_kvm_dirty_ring_reaper("wakeup"); | |
1464 | r->reaper_state = KVM_DIRTY_RING_REAPER_REAPING; | |
1465 | ||
1466 | qemu_mutex_lock_iothread(); | |
1467 | kvm_dirty_ring_reap(s); | |
1468 | qemu_mutex_unlock_iothread(); | |
1469 | ||
1470 | r->reaper_iteration++; | |
1471 | } | |
1472 | ||
1473 | trace_kvm_dirty_ring_reaper("exit"); | |
1474 | ||
1475 | rcu_unregister_thread(); | |
1476 | ||
1477 | return NULL; | |
1478 | } | |
1479 | ||
1480 | static int kvm_dirty_ring_reaper_init(KVMState *s) | |
1481 | { | |
1482 | struct KVMDirtyRingReaper *r = &s->reaper; | |
1483 | ||
1484 | qemu_thread_create(&r->reaper_thr, "kvm-reaper", | |
1485 | kvm_dirty_ring_reaper_thread, | |
1486 | s, QEMU_THREAD_JOINABLE); | |
1487 | ||
1488 | return 0; | |
1489 | } | |
1490 | ||
a01672d3 AK |
1491 | static void kvm_region_add(MemoryListener *listener, |
1492 | MemoryRegionSection *section) | |
1493 | { | |
7bbda04c PB |
1494 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
1495 | ||
dfde4e6e | 1496 | memory_region_ref(section->mr); |
7bbda04c | 1497 | kvm_set_phys_mem(kml, section, true); |
a01672d3 AK |
1498 | } |
1499 | ||
1500 | static void kvm_region_del(MemoryListener *listener, | |
1501 | MemoryRegionSection *section) | |
1502 | { | |
7bbda04c PB |
1503 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
1504 | ||
1505 | kvm_set_phys_mem(kml, section, false); | |
dfde4e6e | 1506 | memory_region_unref(section->mr); |
a01672d3 AK |
1507 | } |
1508 | ||
1509 | static void kvm_log_sync(MemoryListener *listener, | |
1510 | MemoryRegionSection *section) | |
7b8f3b78 | 1511 | { |
7bbda04c | 1512 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 | 1513 | |
a2f77862 | 1514 | kvm_slots_lock(); |
e65e5f50 | 1515 | kvm_physical_sync_dirty_bitmap(kml, section); |
a2f77862 | 1516 | kvm_slots_unlock(); |
7b8f3b78 MT |
1517 | } |
1518 | ||
b4420f19 PX |
1519 | static void kvm_log_sync_global(MemoryListener *l) |
1520 | { | |
1521 | KVMMemoryListener *kml = container_of(l, KVMMemoryListener, listener); | |
1522 | KVMState *s = kvm_state; | |
1523 | KVMSlot *mem; | |
1524 | int i; | |
1525 | ||
1526 | /* Flush all kernel dirty addresses into KVMSlot dirty bitmap */ | |
1527 | kvm_dirty_ring_flush(); | |
1528 | ||
1529 | /* | |
1530 | * TODO: make this faster when nr_slots is big while there are | |
1531 | * only a few used slots (small VMs). | |
1532 | */ | |
1533 | kvm_slots_lock(); | |
1534 | for (i = 0; i < s->nr_slots; i++) { | |
1535 | mem = &kml->slots[i]; | |
1536 | if (mem->memory_size && mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { | |
1537 | kvm_slot_sync_dirty_pages(mem); | |
1538 | /* | |
1539 | * This is not needed by KVM_GET_DIRTY_LOG because the | |
1540 | * ioctl will unconditionally overwrite the whole region. | |
1541 | * However kvm dirty ring has no such side effect. | |
1542 | */ | |
1543 | kvm_slot_reset_dirty_pages(mem); | |
1544 | } | |
1545 | } | |
1546 | kvm_slots_unlock(); | |
1547 | } | |
1548 | ||
ff4aa114 PX |
1549 | static void kvm_log_clear(MemoryListener *listener, |
1550 | MemoryRegionSection *section) | |
1551 | { | |
1552 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); | |
1553 | int r; | |
1554 | ||
1555 | r = kvm_physical_log_clear(kml, section); | |
1556 | if (r < 0) { | |
1557 | error_report_once("%s: kvm log clear failed: mr=%s " | |
1558 | "offset=%"HWADDR_PRIx" size=%"PRIx64, __func__, | |
1559 | section->mr->name, section->offset_within_region, | |
1560 | int128_get64(section->size)); | |
1561 | abort(); | |
1562 | } | |
1563 | } | |
1564 | ||
d22b096e AK |
1565 | static void kvm_mem_ioeventfd_add(MemoryListener *listener, |
1566 | MemoryRegionSection *section, | |
1567 | bool match_data, uint64_t data, | |
1568 | EventNotifier *e) | |
1569 | { | |
1570 | int fd = event_notifier_get_fd(e); | |
80a1ea37 AK |
1571 | int r; |
1572 | ||
4b8f1c88 | 1573 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
1574 | data, true, int128_get64(section->size), |
1575 | match_data); | |
80a1ea37 | 1576 | if (r < 0) { |
e346bcbf YK |
1577 | fprintf(stderr, "%s: error adding ioeventfd: %s (%d)\n", |
1578 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1579 | abort(); |
1580 | } | |
1581 | } | |
1582 | ||
d22b096e AK |
1583 | static void kvm_mem_ioeventfd_del(MemoryListener *listener, |
1584 | MemoryRegionSection *section, | |
1585 | bool match_data, uint64_t data, | |
1586 | EventNotifier *e) | |
80a1ea37 | 1587 | { |
d22b096e | 1588 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
1589 | int r; |
1590 | ||
4b8f1c88 | 1591 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
1592 | data, false, int128_get64(section->size), |
1593 | match_data); | |
80a1ea37 | 1594 | if (r < 0) { |
e346bcbf YK |
1595 | fprintf(stderr, "%s: error deleting ioeventfd: %s (%d)\n", |
1596 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1597 | abort(); |
1598 | } | |
1599 | } | |
1600 | ||
d22b096e AK |
1601 | static void kvm_io_ioeventfd_add(MemoryListener *listener, |
1602 | MemoryRegionSection *section, | |
1603 | bool match_data, uint64_t data, | |
1604 | EventNotifier *e) | |
80a1ea37 | 1605 | { |
d22b096e | 1606 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
1607 | int r; |
1608 | ||
44c3f8f7 | 1609 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
1610 | data, true, int128_get64(section->size), |
1611 | match_data); | |
80a1ea37 | 1612 | if (r < 0) { |
e346bcbf YK |
1613 | fprintf(stderr, "%s: error adding ioeventfd: %s (%d)\n", |
1614 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1615 | abort(); |
1616 | } | |
1617 | } | |
1618 | ||
d22b096e AK |
1619 | static void kvm_io_ioeventfd_del(MemoryListener *listener, |
1620 | MemoryRegionSection *section, | |
1621 | bool match_data, uint64_t data, | |
1622 | EventNotifier *e) | |
80a1ea37 AK |
1623 | |
1624 | { | |
d22b096e | 1625 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
1626 | int r; |
1627 | ||
44c3f8f7 | 1628 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
1629 | data, false, int128_get64(section->size), |
1630 | match_data); | |
80a1ea37 | 1631 | if (r < 0) { |
e346bcbf YK |
1632 | fprintf(stderr, "%s: error deleting ioeventfd: %s (%d)\n", |
1633 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1634 | abort(); |
1635 | } | |
1636 | } | |
1637 | ||
38bfe691 | 1638 | void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml, |
142518bd | 1639 | AddressSpace *as, int as_id, const char *name) |
7bbda04c PB |
1640 | { |
1641 | int i; | |
1642 | ||
1643 | kml->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot)); | |
38bfe691 | 1644 | kml->as_id = as_id; |
7bbda04c PB |
1645 | |
1646 | for (i = 0; i < s->nr_slots; i++) { | |
1647 | kml->slots[i].slot = i; | |
1648 | } | |
1649 | ||
1650 | kml->listener.region_add = kvm_region_add; | |
1651 | kml->listener.region_del = kvm_region_del; | |
1652 | kml->listener.log_start = kvm_log_start; | |
1653 | kml->listener.log_stop = kvm_log_stop; | |
7bbda04c | 1654 | kml->listener.priority = 10; |
142518bd | 1655 | kml->listener.name = name; |
7bbda04c | 1656 | |
b4420f19 PX |
1657 | if (s->kvm_dirty_ring_size) { |
1658 | kml->listener.log_sync_global = kvm_log_sync_global; | |
1659 | } else { | |
1660 | kml->listener.log_sync = kvm_log_sync; | |
1661 | kml->listener.log_clear = kvm_log_clear; | |
1662 | } | |
1663 | ||
7bbda04c | 1664 | memory_listener_register(&kml->listener, as); |
8072aae3 AK |
1665 | |
1666 | for (i = 0; i < s->nr_as; ++i) { | |
1667 | if (!s->as[i].as) { | |
1668 | s->as[i].as = as; | |
1669 | s->as[i].ml = kml; | |
1670 | break; | |
1671 | } | |
1672 | } | |
7bbda04c | 1673 | } |
d22b096e AK |
1674 | |
1675 | static MemoryListener kvm_io_listener = { | |
142518bd | 1676 | .name = "kvm-io", |
d22b096e AK |
1677 | .eventfd_add = kvm_io_ioeventfd_add, |
1678 | .eventfd_del = kvm_io_ioeventfd_del, | |
72e22d2f | 1679 | .priority = 10, |
7b8f3b78 MT |
1680 | }; |
1681 | ||
3889c3fa | 1682 | int kvm_set_irq(KVMState *s, int irq, int level) |
84b058d7 JK |
1683 | { |
1684 | struct kvm_irq_level event; | |
1685 | int ret; | |
1686 | ||
7ae26bd4 | 1687 | assert(kvm_async_interrupts_enabled()); |
84b058d7 JK |
1688 | |
1689 | event.level = level; | |
1690 | event.irq = irq; | |
e333cd69 | 1691 | ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event); |
84b058d7 | 1692 | if (ret < 0) { |
3889c3fa | 1693 | perror("kvm_set_irq"); |
84b058d7 JK |
1694 | abort(); |
1695 | } | |
1696 | ||
e333cd69 | 1697 | return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status; |
84b058d7 JK |
1698 | } |
1699 | ||
1700 | #ifdef KVM_CAP_IRQ_ROUTING | |
d3d3bef0 JK |
1701 | typedef struct KVMMSIRoute { |
1702 | struct kvm_irq_routing_entry kroute; | |
1703 | QTAILQ_ENTRY(KVMMSIRoute) entry; | |
1704 | } KVMMSIRoute; | |
1705 | ||
84b058d7 JK |
1706 | static void set_gsi(KVMState *s, unsigned int gsi) |
1707 | { | |
8269fb70 | 1708 | set_bit(gsi, s->used_gsi_bitmap); |
84b058d7 JK |
1709 | } |
1710 | ||
04fa27f5 JK |
1711 | static void clear_gsi(KVMState *s, unsigned int gsi) |
1712 | { | |
8269fb70 | 1713 | clear_bit(gsi, s->used_gsi_bitmap); |
04fa27f5 JK |
1714 | } |
1715 | ||
7b774593 | 1716 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 | 1717 | { |
04fa27f5 | 1718 | int gsi_count, i; |
84b058d7 | 1719 | |
00008418 | 1720 | gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1; |
84b058d7 | 1721 | if (gsi_count > 0) { |
84b058d7 | 1722 | /* Round up so we can search ints using ffs */ |
8269fb70 | 1723 | s->used_gsi_bitmap = bitmap_new(gsi_count); |
4e2e4e63 | 1724 | s->gsi_count = gsi_count; |
84b058d7 JK |
1725 | } |
1726 | ||
1727 | s->irq_routes = g_malloc0(sizeof(*s->irq_routes)); | |
1728 | s->nr_allocated_irq_routes = 0; | |
1729 | ||
50bf31b9 | 1730 | if (!kvm_direct_msi_allowed) { |
4a3adebb JK |
1731 | for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) { |
1732 | QTAILQ_INIT(&s->msi_hashtab[i]); | |
1733 | } | |
04fa27f5 JK |
1734 | } |
1735 | ||
84b058d7 JK |
1736 | kvm_arch_init_irq_routing(s); |
1737 | } | |
1738 | ||
cb925cf9 | 1739 | void kvm_irqchip_commit_routes(KVMState *s) |
e7b20308 JK |
1740 | { |
1741 | int ret; | |
1742 | ||
7005f7f8 PX |
1743 | if (kvm_gsi_direct_mapping()) { |
1744 | return; | |
1745 | } | |
1746 | ||
1747 | if (!kvm_gsi_routing_enabled()) { | |
1748 | return; | |
1749 | } | |
1750 | ||
e7b20308 | 1751 | s->irq_routes->flags = 0; |
54a6c11b | 1752 | trace_kvm_irqchip_commit_routes(); |
e7b20308 JK |
1753 | ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); |
1754 | assert(ret == 0); | |
1755 | } | |
1756 | ||
84b058d7 JK |
1757 | static void kvm_add_routing_entry(KVMState *s, |
1758 | struct kvm_irq_routing_entry *entry) | |
1759 | { | |
1760 | struct kvm_irq_routing_entry *new; | |
1761 | int n, size; | |
1762 | ||
1763 | if (s->irq_routes->nr == s->nr_allocated_irq_routes) { | |
1764 | n = s->nr_allocated_irq_routes * 2; | |
1765 | if (n < 64) { | |
1766 | n = 64; | |
1767 | } | |
1768 | size = sizeof(struct kvm_irq_routing); | |
1769 | size += n * sizeof(*new); | |
1770 | s->irq_routes = g_realloc(s->irq_routes, size); | |
1771 | s->nr_allocated_irq_routes = n; | |
1772 | } | |
1773 | n = s->irq_routes->nr++; | |
1774 | new = &s->irq_routes->entries[n]; | |
0fbc2074 MT |
1775 | |
1776 | *new = *entry; | |
84b058d7 JK |
1777 | |
1778 | set_gsi(s, entry->gsi); | |
1779 | } | |
1780 | ||
cc57407e JK |
1781 | static int kvm_update_routing_entry(KVMState *s, |
1782 | struct kvm_irq_routing_entry *new_entry) | |
1783 | { | |
1784 | struct kvm_irq_routing_entry *entry; | |
1785 | int n; | |
1786 | ||
1787 | for (n = 0; n < s->irq_routes->nr; n++) { | |
1788 | entry = &s->irq_routes->entries[n]; | |
1789 | if (entry->gsi != new_entry->gsi) { | |
1790 | continue; | |
1791 | } | |
1792 | ||
40509f7f MT |
1793 | if(!memcmp(entry, new_entry, sizeof *entry)) { |
1794 | return 0; | |
1795 | } | |
1796 | ||
0fbc2074 | 1797 | *entry = *new_entry; |
cc57407e | 1798 | |
cc57407e JK |
1799 | return 0; |
1800 | } | |
1801 | ||
1802 | return -ESRCH; | |
1803 | } | |
1804 | ||
1df186df | 1805 | void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin) |
84b058d7 | 1806 | { |
0fbc2074 | 1807 | struct kvm_irq_routing_entry e = {}; |
84b058d7 | 1808 | |
4e2e4e63 JK |
1809 | assert(pin < s->gsi_count); |
1810 | ||
84b058d7 JK |
1811 | e.gsi = irq; |
1812 | e.type = KVM_IRQ_ROUTING_IRQCHIP; | |
1813 | e.flags = 0; | |
1814 | e.u.irqchip.irqchip = irqchip; | |
1815 | e.u.irqchip.pin = pin; | |
1816 | kvm_add_routing_entry(s, &e); | |
1817 | } | |
1818 | ||
1e2aa8be | 1819 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
04fa27f5 JK |
1820 | { |
1821 | struct kvm_irq_routing_entry *e; | |
1822 | int i; | |
1823 | ||
76fe21de AK |
1824 | if (kvm_gsi_direct_mapping()) { |
1825 | return; | |
1826 | } | |
1827 | ||
04fa27f5 JK |
1828 | for (i = 0; i < s->irq_routes->nr; i++) { |
1829 | e = &s->irq_routes->entries[i]; | |
1830 | if (e->gsi == virq) { | |
1831 | s->irq_routes->nr--; | |
1832 | *e = s->irq_routes->entries[s->irq_routes->nr]; | |
1833 | } | |
1834 | } | |
1835 | clear_gsi(s, virq); | |
38d87493 | 1836 | kvm_arch_release_virq_post(virq); |
9ba35d0b | 1837 | trace_kvm_irqchip_release_virq(virq); |
04fa27f5 JK |
1838 | } |
1839 | ||
3607715a DG |
1840 | void kvm_irqchip_add_change_notifier(Notifier *n) |
1841 | { | |
1842 | notifier_list_add(&kvm_irqchip_change_notifiers, n); | |
1843 | } | |
1844 | ||
1845 | void kvm_irqchip_remove_change_notifier(Notifier *n) | |
1846 | { | |
1847 | notifier_remove(n); | |
1848 | } | |
1849 | ||
1850 | void kvm_irqchip_change_notify(void) | |
1851 | { | |
1852 | notifier_list_notify(&kvm_irqchip_change_notifiers, NULL); | |
1853 | } | |
1854 | ||
04fa27f5 JK |
1855 | static unsigned int kvm_hash_msi(uint32_t data) |
1856 | { | |
1857 | /* This is optimized for IA32 MSI layout. However, no other arch shall | |
1858 | * repeat the mistake of not providing a direct MSI injection API. */ | |
1859 | return data & 0xff; | |
1860 | } | |
1861 | ||
1862 | static void kvm_flush_dynamic_msi_routes(KVMState *s) | |
1863 | { | |
1864 | KVMMSIRoute *route, *next; | |
1865 | unsigned int hash; | |
1866 | ||
1867 | for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) { | |
1868 | QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) { | |
1869 | kvm_irqchip_release_virq(s, route->kroute.gsi); | |
1870 | QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry); | |
1871 | g_free(route); | |
1872 | } | |
1873 | } | |
1874 | } | |
1875 | ||
1876 | static int kvm_irqchip_get_virq(KVMState *s) | |
1877 | { | |
8269fb70 | 1878 | int next_virq; |
04fa27f5 | 1879 | |
bdf02631 WM |
1880 | /* |
1881 | * PIC and IOAPIC share the first 16 GSI numbers, thus the available | |
1882 | * GSI numbers are more than the number of IRQ route. Allocating a GSI | |
1883 | * number can succeed even though a new route entry cannot be added. | |
1884 | * When this happens, flush dynamic MSI entries to free IRQ route entries. | |
1885 | */ | |
50bf31b9 | 1886 | if (!kvm_direct_msi_allowed && s->irq_routes->nr == s->gsi_count) { |
bdf02631 WM |
1887 | kvm_flush_dynamic_msi_routes(s); |
1888 | } | |
1889 | ||
04fa27f5 | 1890 | /* Return the lowest unused GSI in the bitmap */ |
8269fb70 WY |
1891 | next_virq = find_first_zero_bit(s->used_gsi_bitmap, s->gsi_count); |
1892 | if (next_virq >= s->gsi_count) { | |
1893 | return -ENOSPC; | |
1894 | } else { | |
1895 | return next_virq; | |
04fa27f5 | 1896 | } |
04fa27f5 JK |
1897 | } |
1898 | ||
1899 | static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg) | |
1900 | { | |
1901 | unsigned int hash = kvm_hash_msi(msg.data); | |
1902 | KVMMSIRoute *route; | |
1903 | ||
1904 | QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) { | |
1905 | if (route->kroute.u.msi.address_lo == (uint32_t)msg.address && | |
1906 | route->kroute.u.msi.address_hi == (msg.address >> 32) && | |
d07cc1f1 | 1907 | route->kroute.u.msi.data == le32_to_cpu(msg.data)) { |
04fa27f5 JK |
1908 | return route; |
1909 | } | |
1910 | } | |
1911 | return NULL; | |
1912 | } | |
1913 | ||
1914 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1915 | { | |
4a3adebb | 1916 | struct kvm_msi msi; |
04fa27f5 JK |
1917 | KVMMSIRoute *route; |
1918 | ||
50bf31b9 | 1919 | if (kvm_direct_msi_allowed) { |
4a3adebb JK |
1920 | msi.address_lo = (uint32_t)msg.address; |
1921 | msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1922 | msi.data = le32_to_cpu(msg.data); |
4a3adebb JK |
1923 | msi.flags = 0; |
1924 | memset(msi.pad, 0, sizeof(msi.pad)); | |
1925 | ||
1926 | return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi); | |
1927 | } | |
1928 | ||
04fa27f5 JK |
1929 | route = kvm_lookup_msi_route(s, msg); |
1930 | if (!route) { | |
e7b20308 | 1931 | int virq; |
04fa27f5 JK |
1932 | |
1933 | virq = kvm_irqchip_get_virq(s); | |
1934 | if (virq < 0) { | |
1935 | return virq; | |
1936 | } | |
1937 | ||
0fbc2074 | 1938 | route = g_malloc0(sizeof(KVMMSIRoute)); |
04fa27f5 JK |
1939 | route->kroute.gsi = virq; |
1940 | route->kroute.type = KVM_IRQ_ROUTING_MSI; | |
1941 | route->kroute.flags = 0; | |
1942 | route->kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1943 | route->kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1944 | route->kroute.u.msi.data = le32_to_cpu(msg.data); |
04fa27f5 JK |
1945 | |
1946 | kvm_add_routing_entry(s, &route->kroute); | |
cb925cf9 | 1947 | kvm_irqchip_commit_routes(s); |
04fa27f5 JK |
1948 | |
1949 | QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route, | |
1950 | entry); | |
04fa27f5 JK |
1951 | } |
1952 | ||
1953 | assert(route->kroute.type == KVM_IRQ_ROUTING_MSI); | |
1954 | ||
3889c3fa | 1955 | return kvm_set_irq(s, route->kroute.gsi, 1); |
04fa27f5 JK |
1956 | } |
1957 | ||
d1f6af6a | 1958 | int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) |
92b4e489 | 1959 | { |
0fbc2074 | 1960 | struct kvm_irq_routing_entry kroute = {}; |
92b4e489 | 1961 | int virq; |
d1f6af6a PX |
1962 | MSIMessage msg = {0, 0}; |
1963 | ||
88c725c7 | 1964 | if (pci_available && dev) { |
e1d4fb2d | 1965 | msg = pci_get_msi_message(dev, vector); |
d1f6af6a | 1966 | } |
92b4e489 | 1967 | |
76fe21de | 1968 | if (kvm_gsi_direct_mapping()) { |
1850b6b7 | 1969 | return kvm_arch_msi_data_to_gsi(msg.data); |
76fe21de AK |
1970 | } |
1971 | ||
f3e1bed8 | 1972 | if (!kvm_gsi_routing_enabled()) { |
92b4e489 JK |
1973 | return -ENOSYS; |
1974 | } | |
1975 | ||
1976 | virq = kvm_irqchip_get_virq(s); | |
1977 | if (virq < 0) { | |
1978 | return virq; | |
1979 | } | |
1980 | ||
1981 | kroute.gsi = virq; | |
1982 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1983 | kroute.flags = 0; | |
1984 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1985 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1986 | kroute.u.msi.data = le32_to_cpu(msg.data); |
88c725c7 | 1987 | if (pci_available && kvm_msi_devid_required()) { |
767a554a PF |
1988 | kroute.flags = KVM_MSI_VALID_DEVID; |
1989 | kroute.u.msi.devid = pci_requester_id(dev); | |
1990 | } | |
dc9f06ca | 1991 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { |
9e03a040 FB |
1992 | kvm_irqchip_release_virq(s, virq); |
1993 | return -EINVAL; | |
1994 | } | |
92b4e489 | 1995 | |
9ba35d0b PX |
1996 | trace_kvm_irqchip_add_msi_route(dev ? dev->name : (char *)"N/A", |
1997 | vector, virq); | |
54a6c11b | 1998 | |
92b4e489 | 1999 | kvm_add_routing_entry(s, &kroute); |
38d87493 | 2000 | kvm_arch_add_msi_route_post(&kroute, vector, dev); |
cb925cf9 | 2001 | kvm_irqchip_commit_routes(s); |
92b4e489 JK |
2002 | |
2003 | return virq; | |
2004 | } | |
2005 | ||
dc9f06ca PF |
2006 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg, |
2007 | PCIDevice *dev) | |
cc57407e | 2008 | { |
0fbc2074 | 2009 | struct kvm_irq_routing_entry kroute = {}; |
cc57407e | 2010 | |
76fe21de AK |
2011 | if (kvm_gsi_direct_mapping()) { |
2012 | return 0; | |
2013 | } | |
2014 | ||
cc57407e JK |
2015 | if (!kvm_irqchip_in_kernel()) { |
2016 | return -ENOSYS; | |
2017 | } | |
2018 | ||
2019 | kroute.gsi = virq; | |
2020 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
2021 | kroute.flags = 0; | |
2022 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
2023 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 2024 | kroute.u.msi.data = le32_to_cpu(msg.data); |
88c725c7 | 2025 | if (pci_available && kvm_msi_devid_required()) { |
767a554a PF |
2026 | kroute.flags = KVM_MSI_VALID_DEVID; |
2027 | kroute.u.msi.devid = pci_requester_id(dev); | |
2028 | } | |
dc9f06ca | 2029 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { |
9e03a040 FB |
2030 | return -EINVAL; |
2031 | } | |
cc57407e | 2032 | |
54a6c11b PX |
2033 | trace_kvm_irqchip_update_msi_route(virq); |
2034 | ||
cc57407e JK |
2035 | return kvm_update_routing_entry(s, &kroute); |
2036 | } | |
2037 | ||
ff66ba87 PX |
2038 | static int kvm_irqchip_assign_irqfd(KVMState *s, EventNotifier *event, |
2039 | EventNotifier *resample, int virq, | |
ca916d37 | 2040 | bool assign) |
39853bbc | 2041 | { |
ff66ba87 PX |
2042 | int fd = event_notifier_get_fd(event); |
2043 | int rfd = resample ? event_notifier_get_fd(resample) : -1; | |
2044 | ||
39853bbc JK |
2045 | struct kvm_irqfd irqfd = { |
2046 | .fd = fd, | |
2047 | .gsi = virq, | |
2048 | .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN, | |
2049 | }; | |
2050 | ||
ca916d37 | 2051 | if (rfd != -1) { |
c82d9d43 PX |
2052 | assert(assign); |
2053 | if (kvm_irqchip_is_split()) { | |
2054 | /* | |
2055 | * When the slow irqchip (e.g. IOAPIC) is in the | |
2056 | * userspace, KVM kernel resamplefd will not work because | |
2057 | * the EOI of the interrupt will be delivered to userspace | |
2058 | * instead, so the KVM kernel resamplefd kick will be | |
2059 | * skipped. The userspace here mimics what the kernel | |
2060 | * provides with resamplefd, remember the resamplefd and | |
2061 | * kick it when we receive EOI of this IRQ. | |
2062 | * | |
2063 | * This is hackery because IOAPIC is mostly bypassed | |
2064 | * (except EOI broadcasts) when irqfd is used. However | |
2065 | * this can bring much performance back for split irqchip | |
2066 | * with INTx IRQs (for VFIO, this gives 93% perf of the | |
2067 | * full fast path, which is 46% perf boost comparing to | |
2068 | * the INTx slow path). | |
2069 | */ | |
2070 | kvm_resample_fd_insert(virq, resample); | |
2071 | } else { | |
2072 | irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE; | |
2073 | irqfd.resamplefd = rfd; | |
2074 | } | |
2075 | } else if (!assign) { | |
2076 | if (kvm_irqchip_is_split()) { | |
2077 | kvm_resample_fd_remove(virq); | |
2078 | } | |
ca916d37 VM |
2079 | } |
2080 | ||
cc7e0ddf | 2081 | if (!kvm_irqfds_enabled()) { |
39853bbc JK |
2082 | return -ENOSYS; |
2083 | } | |
2084 | ||
2085 | return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd); | |
2086 | } | |
2087 | ||
d426d9fb CH |
2088 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
2089 | { | |
e9af2fef | 2090 | struct kvm_irq_routing_entry kroute = {}; |
d426d9fb CH |
2091 | int virq; |
2092 | ||
2093 | if (!kvm_gsi_routing_enabled()) { | |
2094 | return -ENOSYS; | |
2095 | } | |
2096 | ||
2097 | virq = kvm_irqchip_get_virq(s); | |
2098 | if (virq < 0) { | |
2099 | return virq; | |
2100 | } | |
2101 | ||
2102 | kroute.gsi = virq; | |
2103 | kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER; | |
2104 | kroute.flags = 0; | |
2105 | kroute.u.adapter.summary_addr = adapter->summary_addr; | |
2106 | kroute.u.adapter.ind_addr = adapter->ind_addr; | |
2107 | kroute.u.adapter.summary_offset = adapter->summary_offset; | |
2108 | kroute.u.adapter.ind_offset = adapter->ind_offset; | |
2109 | kroute.u.adapter.adapter_id = adapter->adapter_id; | |
2110 | ||
2111 | kvm_add_routing_entry(s, &kroute); | |
d426d9fb CH |
2112 | |
2113 | return virq; | |
2114 | } | |
2115 | ||
977a8d9c AS |
2116 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) |
2117 | { | |
2118 | struct kvm_irq_routing_entry kroute = {}; | |
2119 | int virq; | |
2120 | ||
2121 | if (!kvm_gsi_routing_enabled()) { | |
2122 | return -ENOSYS; | |
2123 | } | |
2124 | if (!kvm_check_extension(s, KVM_CAP_HYPERV_SYNIC)) { | |
2125 | return -ENOSYS; | |
2126 | } | |
2127 | virq = kvm_irqchip_get_virq(s); | |
2128 | if (virq < 0) { | |
2129 | return virq; | |
2130 | } | |
2131 | ||
2132 | kroute.gsi = virq; | |
2133 | kroute.type = KVM_IRQ_ROUTING_HV_SINT; | |
2134 | kroute.flags = 0; | |
2135 | kroute.u.hv_sint.vcpu = vcpu; | |
2136 | kroute.u.hv_sint.sint = sint; | |
2137 | ||
2138 | kvm_add_routing_entry(s, &kroute); | |
2139 | kvm_irqchip_commit_routes(s); | |
2140 | ||
2141 | return virq; | |
2142 | } | |
2143 | ||
84b058d7 JK |
2144 | #else /* !KVM_CAP_IRQ_ROUTING */ |
2145 | ||
7b774593 | 2146 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 JK |
2147 | { |
2148 | } | |
04fa27f5 | 2149 | |
d3d3bef0 JK |
2150 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
2151 | { | |
2152 | } | |
2153 | ||
04fa27f5 JK |
2154 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) |
2155 | { | |
2156 | abort(); | |
2157 | } | |
92b4e489 | 2158 | |
d1f6af6a | 2159 | int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) |
92b4e489 | 2160 | { |
df410675 | 2161 | return -ENOSYS; |
92b4e489 | 2162 | } |
39853bbc | 2163 | |
d426d9fb CH |
2164 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
2165 | { | |
2166 | return -ENOSYS; | |
2167 | } | |
2168 | ||
977a8d9c AS |
2169 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) |
2170 | { | |
2171 | return -ENOSYS; | |
2172 | } | |
2173 | ||
ff66ba87 PX |
2174 | static int kvm_irqchip_assign_irqfd(KVMState *s, EventNotifier *event, |
2175 | EventNotifier *resample, int virq, | |
2176 | bool assign) | |
39853bbc JK |
2177 | { |
2178 | abort(); | |
2179 | } | |
dabe3143 MT |
2180 | |
2181 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) | |
2182 | { | |
2183 | return -ENOSYS; | |
2184 | } | |
84b058d7 JK |
2185 | #endif /* !KVM_CAP_IRQ_ROUTING */ |
2186 | ||
1c9b71a7 EA |
2187 | int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, |
2188 | EventNotifier *rn, int virq) | |
39853bbc | 2189 | { |
ff66ba87 | 2190 | return kvm_irqchip_assign_irqfd(s, n, rn, virq, true); |
39853bbc JK |
2191 | } |
2192 | ||
1c9b71a7 EA |
2193 | int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, |
2194 | int virq) | |
15b2bd18 | 2195 | { |
ff66ba87 | 2196 | return kvm_irqchip_assign_irqfd(s, n, NULL, virq, false); |
15b2bd18 PB |
2197 | } |
2198 | ||
197e3524 EA |
2199 | int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, |
2200 | EventNotifier *rn, qemu_irq irq) | |
2201 | { | |
2202 | gpointer key, gsi; | |
2203 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
2204 | ||
2205 | if (!found) { | |
2206 | return -ENXIO; | |
2207 | } | |
2208 | return kvm_irqchip_add_irqfd_notifier_gsi(s, n, rn, GPOINTER_TO_INT(gsi)); | |
2209 | } | |
2210 | ||
2211 | int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, | |
2212 | qemu_irq irq) | |
2213 | { | |
2214 | gpointer key, gsi; | |
2215 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
2216 | ||
2217 | if (!found) { | |
2218 | return -ENXIO; | |
2219 | } | |
2220 | return kvm_irqchip_remove_irqfd_notifier_gsi(s, n, GPOINTER_TO_INT(gsi)); | |
2221 | } | |
2222 | ||
2223 | void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi) | |
2224 | { | |
2225 | g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi)); | |
2226 | } | |
2227 | ||
4376c40d | 2228 | static void kvm_irqchip_create(KVMState *s) |
84b058d7 | 2229 | { |
84b058d7 JK |
2230 | int ret; |
2231 | ||
d1972be1 | 2232 | assert(s->kernel_irqchip_split != ON_OFF_AUTO_AUTO); |
8db4936b PB |
2233 | if (kvm_check_extension(s, KVM_CAP_IRQCHIP)) { |
2234 | ; | |
2235 | } else if (kvm_check_extension(s, KVM_CAP_S390_IRQCHIP)) { | |
2236 | ret = kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0); | |
2237 | if (ret < 0) { | |
2238 | fprintf(stderr, "Enable kernel irqchip failed: %s\n", strerror(-ret)); | |
2239 | exit(1); | |
2240 | } | |
2241 | } else { | |
2242 | return; | |
84b058d7 JK |
2243 | } |
2244 | ||
d6032e06 CD |
2245 | /* First probe and see if there's a arch-specific hook to create the |
2246 | * in-kernel irqchip for us */ | |
4376c40d | 2247 | ret = kvm_arch_irqchip_create(s); |
8db4936b | 2248 | if (ret == 0) { |
d1972be1 | 2249 | if (s->kernel_irqchip_split == ON_OFF_AUTO_ON) { |
15eafc2e PB |
2250 | perror("Split IRQ chip mode not supported."); |
2251 | exit(1); | |
2252 | } else { | |
2253 | ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); | |
2254 | } | |
8db4936b PB |
2255 | } |
2256 | if (ret < 0) { | |
2257 | fprintf(stderr, "Create kernel irqchip failed: %s\n", strerror(-ret)); | |
2258 | exit(1); | |
84b058d7 JK |
2259 | } |
2260 | ||
3d4b2649 | 2261 | kvm_kernel_irqchip = true; |
7ae26bd4 PM |
2262 | /* If we have an in-kernel IRQ chip then we must have asynchronous |
2263 | * interrupt delivery (though the reverse is not necessarily true) | |
2264 | */ | |
2265 | kvm_async_interrupts_allowed = true; | |
215e79c0 | 2266 | kvm_halt_in_kernel_allowed = true; |
84b058d7 JK |
2267 | |
2268 | kvm_init_irq_routing(s); | |
2269 | ||
197e3524 | 2270 | s->gsimap = g_hash_table_new(g_direct_hash, g_direct_equal); |
84b058d7 JK |
2271 | } |
2272 | ||
670436ce AJ |
2273 | /* Find number of supported CPUs using the recommended |
2274 | * procedure from the kernel API documentation to cope with | |
2275 | * older kernels that may be missing capabilities. | |
2276 | */ | |
2277 | static int kvm_recommended_vcpus(KVMState *s) | |
3ed444e9 | 2278 | { |
11748ba7 | 2279 | int ret = kvm_vm_check_extension(s, KVM_CAP_NR_VCPUS); |
670436ce AJ |
2280 | return (ret) ? ret : 4; |
2281 | } | |
3ed444e9 | 2282 | |
670436ce AJ |
2283 | static int kvm_max_vcpus(KVMState *s) |
2284 | { | |
2285 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS); | |
2286 | return (ret) ? ret : kvm_recommended_vcpus(s); | |
3ed444e9 DH |
2287 | } |
2288 | ||
f31e3266 GK |
2289 | static int kvm_max_vcpu_id(KVMState *s) |
2290 | { | |
2291 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPU_ID); | |
2292 | return (ret) ? ret : kvm_max_vcpus(s); | |
2293 | } | |
2294 | ||
41264b38 GK |
2295 | bool kvm_vcpu_id_is_valid(int vcpu_id) |
2296 | { | |
4f7f5893 | 2297 | KVMState *s = KVM_STATE(current_accel()); |
f31e3266 | 2298 | return vcpu_id >= 0 && vcpu_id < kvm_max_vcpu_id(s); |
41264b38 GK |
2299 | } |
2300 | ||
7786ae40 HH |
2301 | bool kvm_dirty_ring_enabled(void) |
2302 | { | |
2303 | return kvm_state->kvm_dirty_ring_size ? true : false; | |
2304 | } | |
2305 | ||
f6a1ef64 | 2306 | static int kvm_init(MachineState *ms) |
05330448 | 2307 | { |
f6a1ef64 | 2308 | MachineClass *mc = MACHINE_GET_CLASS(ms); |
168ccc11 JK |
2309 | static const char upgrade_note[] = |
2310 | "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" | |
2311 | "(see http://sourceforge.net/projects/kvm).\n"; | |
670436ce AJ |
2312 | struct { |
2313 | const char *name; | |
2314 | int num; | |
2315 | } num_cpus[] = { | |
5cc8767d LX |
2316 | { "SMP", ms->smp.cpus }, |
2317 | { "hotpluggable", ms->smp.max_cpus }, | |
670436ce AJ |
2318 | { NULL, } |
2319 | }, *nc = num_cpus; | |
2320 | int soft_vcpus_limit, hard_vcpus_limit; | |
05330448 | 2321 | KVMState *s; |
94a8d39a | 2322 | const KVMCapabilityInfo *missing_cap; |
05330448 | 2323 | int ret; |
7bbda04c | 2324 | int type = 0; |
494cd11d | 2325 | uint64_t dirty_log_manual_caps; |
05330448 | 2326 | |
a2f77862 PX |
2327 | qemu_mutex_init(&kml_slots_lock); |
2328 | ||
fc02086b | 2329 | s = KVM_STATE(ms->accelerator); |
05330448 | 2330 | |
3145fcb6 DG |
2331 | /* |
2332 | * On systems where the kernel can support different base page | |
2333 | * sizes, host page size may be different from TARGET_PAGE_SIZE, | |
2334 | * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum | |
2335 | * page size for the system though. | |
2336 | */ | |
038adc2f | 2337 | assert(TARGET_PAGE_SIZE <= qemu_real_host_page_size); |
3145fcb6 | 2338 | |
aed6efb9 JH |
2339 | s->sigmask_len = 8; |
2340 | ||
e22a25c9 | 2341 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
72cf2d4f | 2342 | QTAILQ_INIT(&s->kvm_sw_breakpoints); |
e22a25c9 | 2343 | #endif |
4c055ab5 | 2344 | QLIST_INIT(&s->kvm_parked_vcpus); |
448058aa | 2345 | s->fd = qemu_open_old("/dev/kvm", O_RDWR); |
05330448 AL |
2346 | if (s->fd == -1) { |
2347 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); | |
2348 | ret = -errno; | |
2349 | goto err; | |
2350 | } | |
2351 | ||
2352 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); | |
2353 | if (ret < KVM_API_VERSION) { | |
0e1dac6c | 2354 | if (ret >= 0) { |
05330448 | 2355 | ret = -EINVAL; |
a426e122 | 2356 | } |
05330448 AL |
2357 | fprintf(stderr, "kvm version too old\n"); |
2358 | goto err; | |
2359 | } | |
2360 | ||
2361 | if (ret > KVM_API_VERSION) { | |
2362 | ret = -EINVAL; | |
2363 | fprintf(stderr, "kvm version not supported\n"); | |
2364 | goto err; | |
2365 | } | |
2366 | ||
cf0f7cf9 | 2367 | kvm_immediate_exit = kvm_check_extension(s, KVM_CAP_IMMEDIATE_EXIT); |
fb541ca5 AW |
2368 | s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS); |
2369 | ||
2370 | /* If unspecified, use the default value */ | |
2371 | if (!s->nr_slots) { | |
2372 | s->nr_slots = 32; | |
2373 | } | |
2374 | ||
8072aae3 AK |
2375 | s->nr_as = kvm_check_extension(s, KVM_CAP_MULTI_ADDRESS_SPACE); |
2376 | if (s->nr_as <= 1) { | |
2377 | s->nr_as = 1; | |
2378 | } | |
2379 | s->as = g_new0(struct KVMAs, s->nr_as); | |
2380 | ||
f2ce39b4 PB |
2381 | if (object_property_find(OBJECT(current_machine), "kvm-type")) { |
2382 | g_autofree char *kvm_type = object_property_get_str(OBJECT(current_machine), | |
2383 | "kvm-type", | |
2384 | &error_abort); | |
dc0ca80e | 2385 | type = mc->kvm_type(ms, kvm_type); |
516fc0a0 AJ |
2386 | } else if (mc->kvm_type) { |
2387 | type = mc->kvm_type(ms, NULL); | |
135a129a AK |
2388 | } |
2389 | ||
94ccff13 | 2390 | do { |
135a129a | 2391 | ret = kvm_ioctl(s, KVM_CREATE_VM, type); |
94ccff13 TK |
2392 | } while (ret == -EINTR); |
2393 | ||
2394 | if (ret < 0) { | |
521f438e | 2395 | fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret, |
94ccff13 TK |
2396 | strerror(-ret)); |
2397 | ||
0104dcac | 2398 | #ifdef TARGET_S390X |
2c80e996 CH |
2399 | if (ret == -EINVAL) { |
2400 | fprintf(stderr, | |
2401 | "Host kernel setup problem detected. Please verify:\n"); | |
2402 | fprintf(stderr, "- for kernels supporting the switch_amode or" | |
2403 | " user_mode parameters, whether\n"); | |
2404 | fprintf(stderr, | |
2405 | " user space is running in primary address space\n"); | |
2406 | fprintf(stderr, | |
2407 | "- for kernels supporting the vm.allocate_pgste sysctl, " | |
2408 | "whether it is enabled\n"); | |
2409 | } | |
380e4929 FR |
2410 | #elif defined(TARGET_PPC) |
2411 | if (ret == -EINVAL) { | |
2412 | fprintf(stderr, | |
2413 | "PPC KVM module is not loaded. Try modprobe kvm_%s.\n", | |
2414 | (type == 2) ? "pr" : "hv"); | |
2415 | } | |
0104dcac | 2416 | #endif |
05330448 | 2417 | goto err; |
0104dcac | 2418 | } |
05330448 | 2419 | |
94ccff13 | 2420 | s->vmfd = ret; |
11748ba7 GK |
2421 | |
2422 | /* check the vcpu limits */ | |
2423 | soft_vcpus_limit = kvm_recommended_vcpus(s); | |
2424 | hard_vcpus_limit = kvm_max_vcpus(s); | |
2425 | ||
2426 | while (nc->name) { | |
2427 | if (nc->num > soft_vcpus_limit) { | |
2428 | warn_report("Number of %s cpus requested (%d) exceeds " | |
2429 | "the recommended cpus supported by KVM (%d)", | |
2430 | nc->name, nc->num, soft_vcpus_limit); | |
2431 | ||
2432 | if (nc->num > hard_vcpus_limit) { | |
2433 | fprintf(stderr, "Number of %s cpus requested (%d) exceeds " | |
2434 | "the maximum cpus supported by KVM (%d)\n", | |
2435 | nc->name, nc->num, hard_vcpus_limit); | |
2436 | exit(1); | |
2437 | } | |
2438 | } | |
2439 | nc++; | |
2440 | } | |
2441 | ||
94a8d39a JK |
2442 | missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); |
2443 | if (!missing_cap) { | |
2444 | missing_cap = | |
2445 | kvm_check_extension_list(s, kvm_arch_required_capabilities); | |
05330448 | 2446 | } |
94a8d39a | 2447 | if (missing_cap) { |
ad7b8b33 | 2448 | ret = -EINVAL; |
94a8d39a JK |
2449 | fprintf(stderr, "kvm does not support %s\n%s", |
2450 | missing_cap->name, upgrade_note); | |
d85dc283 AL |
2451 | goto err; |
2452 | } | |
2453 | ||
ad7b8b33 | 2454 | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
e6d34aee PH |
2455 | s->coalesced_pio = s->coalesced_mmio && |
2456 | kvm_check_extension(s, KVM_CAP_COALESCED_PIO); | |
f65ed4c1 | 2457 | |
b4420f19 PX |
2458 | /* |
2459 | * Enable KVM dirty ring if supported, otherwise fall back to | |
2460 | * dirty logging mode | |
2461 | */ | |
2462 | if (s->kvm_dirty_ring_size > 0) { | |
2463 | uint64_t ring_bytes; | |
2464 | ||
2465 | ring_bytes = s->kvm_dirty_ring_size * sizeof(struct kvm_dirty_gfn); | |
2466 | ||
2467 | /* Read the max supported pages */ | |
2468 | ret = kvm_vm_check_extension(s, KVM_CAP_DIRTY_LOG_RING); | |
2469 | if (ret > 0) { | |
2470 | if (ring_bytes > ret) { | |
2471 | error_report("KVM dirty ring size %" PRIu32 " too big " | |
2472 | "(maximum is %ld). Please use a smaller value.", | |
2473 | s->kvm_dirty_ring_size, | |
2474 | (long)ret / sizeof(struct kvm_dirty_gfn)); | |
2475 | ret = -EINVAL; | |
2476 | goto err; | |
2477 | } | |
2478 | ||
2479 | ret = kvm_vm_enable_cap(s, KVM_CAP_DIRTY_LOG_RING, 0, ring_bytes); | |
2480 | if (ret) { | |
2481 | error_report("Enabling of KVM dirty ring failed: %s. " | |
7916b5fc | 2482 | "Suggested minimum value is 1024.", strerror(-ret)); |
b4420f19 PX |
2483 | goto err; |
2484 | } | |
2485 | ||
2486 | s->kvm_dirty_ring_bytes = ring_bytes; | |
2487 | } else { | |
2488 | warn_report("KVM dirty ring not available, using bitmap method"); | |
2489 | s->kvm_dirty_ring_size = 0; | |
2490 | } | |
2491 | } | |
2492 | ||
a81a5926 PX |
2493 | /* |
2494 | * KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 is not needed when dirty ring is | |
2495 | * enabled. More importantly, KVM_DIRTY_LOG_INITIALLY_SET will assume no | |
2496 | * page is wr-protected initially, which is against how kvm dirty ring is | |
2497 | * usage - kvm dirty ring requires all pages are wr-protected at the very | |
2498 | * beginning. Enabling this feature for dirty ring causes data corruption. | |
b4420f19 PX |
2499 | * |
2500 | * TODO: Without KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 and kvm clear dirty log, | |
2501 | * we may expect a higher stall time when starting the migration. In the | |
2502 | * future we can enable KVM_CLEAR_DIRTY_LOG to work with dirty ring too: | |
2503 | * instead of clearing dirty bit, it can be a way to explicitly wr-protect | |
2504 | * guest pages. | |
a81a5926 PX |
2505 | */ |
2506 | if (!s->kvm_dirty_ring_size) { | |
2507 | dirty_log_manual_caps = | |
2508 | kvm_check_extension(s, KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2); | |
2509 | dirty_log_manual_caps &= (KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE | | |
2510 | KVM_DIRTY_LOG_INITIALLY_SET); | |
2511 | s->manual_dirty_log_protect = dirty_log_manual_caps; | |
2512 | if (dirty_log_manual_caps) { | |
2513 | ret = kvm_vm_enable_cap(s, KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2, 0, | |
2514 | dirty_log_manual_caps); | |
2515 | if (ret) { | |
2516 | warn_report("Trying to enable capability %"PRIu64" of " | |
2517 | "KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 but failed. " | |
2518 | "Falling back to the legacy mode. ", | |
2519 | dirty_log_manual_caps); | |
2520 | s->manual_dirty_log_protect = 0; | |
2521 | } | |
ff4aa114 PX |
2522 | } |
2523 | } | |
2524 | ||
a0fb002c JK |
2525 | #ifdef KVM_CAP_VCPU_EVENTS |
2526 | s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); | |
2527 | #endif | |
2528 | ||
b0b1d690 JK |
2529 | s->robust_singlestep = |
2530 | kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); | |
b0b1d690 | 2531 | |
ff44f1a3 JK |
2532 | #ifdef KVM_CAP_DEBUGREGS |
2533 | s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); | |
2534 | #endif | |
2535 | ||
ebbfef2f LA |
2536 | s->max_nested_state_len = kvm_check_extension(s, KVM_CAP_NESTED_STATE); |
2537 | ||
d3d3bef0 | 2538 | #ifdef KVM_CAP_IRQ_ROUTING |
50bf31b9 | 2539 | kvm_direct_msi_allowed = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0); |
d3d3bef0 | 2540 | #endif |
4a3adebb | 2541 | |
3ab73842 JK |
2542 | s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3); |
2543 | ||
e333cd69 | 2544 | s->irq_set_ioctl = KVM_IRQ_LINE; |
8732fbd2 | 2545 | if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) { |
e333cd69 | 2546 | s->irq_set_ioctl = KVM_IRQ_LINE_STATUS; |
8732fbd2 PM |
2547 | } |
2548 | ||
df9c8b75 JJ |
2549 | kvm_readonly_mem_allowed = |
2550 | (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0); | |
df9c8b75 | 2551 | |
69e03ae6 NN |
2552 | kvm_eventfds_allowed = |
2553 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0); | |
2554 | ||
f41389ae EA |
2555 | kvm_irqfds_allowed = |
2556 | (kvm_check_extension(s, KVM_CAP_IRQFD) > 0); | |
2557 | ||
2558 | kvm_resamplefds_allowed = | |
2559 | (kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0); | |
2560 | ||
d0a073a1 DD |
2561 | kvm_vm_attributes_allowed = |
2562 | (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0); | |
2563 | ||
35108223 JW |
2564 | kvm_ioeventfd_any_length_allowed = |
2565 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD_ANY_LENGTH) > 0); | |
2566 | ||
d870cfde GA |
2567 | kvm_state = s; |
2568 | ||
b16565b3 | 2569 | ret = kvm_arch_init(ms, s); |
a426e122 | 2570 | if (ret < 0) { |
05330448 | 2571 | goto err; |
a426e122 | 2572 | } |
05330448 | 2573 | |
d1972be1 XL |
2574 | if (s->kernel_irqchip_split == ON_OFF_AUTO_AUTO) { |
2575 | s->kernel_irqchip_split = mc->default_kernel_irqchip_split ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF; | |
2576 | } | |
2577 | ||
6b552b9b DG |
2578 | qemu_register_reset(kvm_unpoison_all, NULL); |
2579 | ||
11bc4a13 | 2580 | if (s->kernel_irqchip_allowed) { |
4376c40d | 2581 | kvm_irqchip_create(s); |
84b058d7 JK |
2582 | } |
2583 | ||
8c56c1a5 PF |
2584 | if (kvm_eventfds_allowed) { |
2585 | s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add; | |
2586 | s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del; | |
2587 | } | |
e6d34aee PH |
2588 | s->memory_listener.listener.coalesced_io_add = kvm_coalesce_mmio_region; |
2589 | s->memory_listener.listener.coalesced_io_del = kvm_uncoalesce_mmio_region; | |
7bbda04c PB |
2590 | |
2591 | kvm_memory_listener_register(s, &s->memory_listener, | |
142518bd | 2592 | &address_space_memory, 0, "kvm-memory"); |
f9b49088 EA |
2593 | if (kvm_eventfds_allowed) { |
2594 | memory_listener_register(&kvm_io_listener, | |
2595 | &address_space_io); | |
2596 | } | |
e6d34aee PH |
2597 | memory_listener_register(&kvm_coalesced_pio_listener, |
2598 | &address_space_io); | |
05330448 | 2599 | |
d2f2b8a7 SH |
2600 | s->many_ioeventfds = kvm_check_many_ioeventfds(); |
2601 | ||
62dd4eda | 2602 | s->sync_mmu = !!kvm_vm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); |
f5948942 | 2603 | if (!s->sync_mmu) { |
956b109f DH |
2604 | ret = ram_block_discard_disable(true); |
2605 | assert(!ret); | |
f5948942 | 2606 | } |
b4420f19 PX |
2607 | |
2608 | if (s->kvm_dirty_ring_size) { | |
2609 | ret = kvm_dirty_ring_reaper_init(s); | |
2610 | if (ret) { | |
2611 | goto err; | |
2612 | } | |
2613 | } | |
2614 | ||
05330448 AL |
2615 | return 0; |
2616 | ||
2617 | err: | |
0e1dac6c | 2618 | assert(ret < 0); |
6d1cc321 SW |
2619 | if (s->vmfd >= 0) { |
2620 | close(s->vmfd); | |
2621 | } | |
2622 | if (s->fd != -1) { | |
2623 | close(s->fd); | |
05330448 | 2624 | } |
7bbda04c | 2625 | g_free(s->memory_listener.slots); |
05330448 AL |
2626 | |
2627 | return ret; | |
2628 | } | |
2629 | ||
aed6efb9 JH |
2630 | void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len) |
2631 | { | |
2632 | s->sigmask_len = sigmask_len; | |
2633 | } | |
2634 | ||
4c663752 PB |
2635 | static void kvm_handle_io(uint16_t port, MemTxAttrs attrs, void *data, int direction, |
2636 | int size, uint32_t count) | |
05330448 AL |
2637 | { |
2638 | int i; | |
2639 | uint8_t *ptr = data; | |
2640 | ||
2641 | for (i = 0; i < count; i++) { | |
4c663752 | 2642 | address_space_rw(&address_space_io, port, attrs, |
5c9eb028 | 2643 | ptr, size, |
354678c5 | 2644 | direction == KVM_EXIT_IO_OUT); |
05330448 AL |
2645 | ptr += size; |
2646 | } | |
05330448 AL |
2647 | } |
2648 | ||
5326ab55 | 2649 | static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run) |
7c80eef8 | 2650 | { |
977c7b6d RK |
2651 | fprintf(stderr, "KVM internal error. Suberror: %d\n", |
2652 | run->internal.suberror); | |
2653 | ||
7c80eef8 MT |
2654 | if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) { |
2655 | int i; | |
2656 | ||
7c80eef8 | 2657 | for (i = 0; i < run->internal.ndata; ++i) { |
56567da3 | 2658 | fprintf(stderr, "extra data[%d]: 0x%016"PRIx64"\n", |
7c80eef8 MT |
2659 | i, (uint64_t)run->internal.data[i]); |
2660 | } | |
2661 | } | |
7c80eef8 MT |
2662 | if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) { |
2663 | fprintf(stderr, "emulation failure\n"); | |
20d695a9 | 2664 | if (!kvm_arch_stop_on_emulation_error(cpu)) { |
90c84c56 | 2665 | cpu_dump_state(cpu, stderr, CPU_DUMP_CODE); |
d73cd8f4 | 2666 | return EXCP_INTERRUPT; |
a426e122 | 2667 | } |
7c80eef8 MT |
2668 | } |
2669 | /* FIXME: Should trigger a qmp message to let management know | |
2670 | * something went wrong. | |
2671 | */ | |
73aaec4a | 2672 | return -1; |
7c80eef8 | 2673 | } |
7c80eef8 | 2674 | |
62a2744c | 2675 | void kvm_flush_coalesced_mmio_buffer(void) |
f65ed4c1 | 2676 | { |
f65ed4c1 | 2677 | KVMState *s = kvm_state; |
1cae88b9 AK |
2678 | |
2679 | if (s->coalesced_flush_in_progress) { | |
2680 | return; | |
2681 | } | |
2682 | ||
2683 | s->coalesced_flush_in_progress = true; | |
2684 | ||
62a2744c SY |
2685 | if (s->coalesced_mmio_ring) { |
2686 | struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring; | |
f65ed4c1 AL |
2687 | while (ring->first != ring->last) { |
2688 | struct kvm_coalesced_mmio *ent; | |
2689 | ||
2690 | ent = &ring->coalesced_mmio[ring->first]; | |
2691 | ||
e6d34aee | 2692 | if (ent->pio == 1) { |
19f70347 PM |
2693 | address_space_write(&address_space_io, ent->phys_addr, |
2694 | MEMTXATTRS_UNSPECIFIED, ent->data, | |
2695 | ent->len); | |
e6d34aee PH |
2696 | } else { |
2697 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); | |
2698 | } | |
85199474 | 2699 | smp_wmb(); |
f65ed4c1 AL |
2700 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; |
2701 | } | |
2702 | } | |
1cae88b9 AK |
2703 | |
2704 | s->coalesced_flush_in_progress = false; | |
f65ed4c1 AL |
2705 | } |
2706 | ||
92a5199b TL |
2707 | bool kvm_cpu_check_are_resettable(void) |
2708 | { | |
2709 | return kvm_arch_cpu_check_are_resettable(); | |
2710 | } | |
2711 | ||
14e6fe12 | 2712 | static void do_kvm_cpu_synchronize_state(CPUState *cpu, run_on_cpu_data arg) |
4c0960c0 | 2713 | { |
99f31832 | 2714 | if (!cpu->vcpu_dirty) { |
20d695a9 | 2715 | kvm_arch_get_registers(cpu); |
99f31832 | 2716 | cpu->vcpu_dirty = true; |
4c0960c0 AK |
2717 | } |
2718 | } | |
2719 | ||
dd1750d7 | 2720 | void kvm_cpu_synchronize_state(CPUState *cpu) |
2705d56a | 2721 | { |
99f31832 | 2722 | if (!cpu->vcpu_dirty) { |
14e6fe12 | 2723 | run_on_cpu(cpu, do_kvm_cpu_synchronize_state, RUN_ON_CPU_NULL); |
a426e122 | 2724 | } |
2705d56a JK |
2725 | } |
2726 | ||
14e6fe12 | 2727 | static void do_kvm_cpu_synchronize_post_reset(CPUState *cpu, run_on_cpu_data arg) |
ea375f9a | 2728 | { |
20d695a9 | 2729 | kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE); |
99f31832 | 2730 | cpu->vcpu_dirty = false; |
ea375f9a JK |
2731 | } |
2732 | ||
c8e2085d DH |
2733 | void kvm_cpu_synchronize_post_reset(CPUState *cpu) |
2734 | { | |
14e6fe12 | 2735 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_reset, RUN_ON_CPU_NULL); |
c8e2085d DH |
2736 | } |
2737 | ||
14e6fe12 | 2738 | static void do_kvm_cpu_synchronize_post_init(CPUState *cpu, run_on_cpu_data arg) |
ea375f9a | 2739 | { |
20d695a9 | 2740 | kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE); |
99f31832 | 2741 | cpu->vcpu_dirty = false; |
ea375f9a JK |
2742 | } |
2743 | ||
c8e2085d DH |
2744 | void kvm_cpu_synchronize_post_init(CPUState *cpu) |
2745 | { | |
14e6fe12 | 2746 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, RUN_ON_CPU_NULL); |
c8e2085d DH |
2747 | } |
2748 | ||
75e972da DG |
2749 | static void do_kvm_cpu_synchronize_pre_loadvm(CPUState *cpu, run_on_cpu_data arg) |
2750 | { | |
99f31832 | 2751 | cpu->vcpu_dirty = true; |
75e972da DG |
2752 | } |
2753 | ||
2754 | void kvm_cpu_synchronize_pre_loadvm(CPUState *cpu) | |
2755 | { | |
2756 | run_on_cpu(cpu, do_kvm_cpu_synchronize_pre_loadvm, RUN_ON_CPU_NULL); | |
2757 | } | |
2758 | ||
2ae41db2 PB |
2759 | #ifdef KVM_HAVE_MCE_INJECTION |
2760 | static __thread void *pending_sigbus_addr; | |
2761 | static __thread int pending_sigbus_code; | |
2762 | static __thread bool have_sigbus_pending; | |
2763 | #endif | |
2764 | ||
cf0f7cf9 PB |
2765 | static void kvm_cpu_kick(CPUState *cpu) |
2766 | { | |
d73415a3 | 2767 | qatomic_set(&cpu->kvm_run->immediate_exit, 1); |
cf0f7cf9 PB |
2768 | } |
2769 | ||
2770 | static void kvm_cpu_kick_self(void) | |
2771 | { | |
2772 | if (kvm_immediate_exit) { | |
2773 | kvm_cpu_kick(current_cpu); | |
2774 | } else { | |
2775 | qemu_cpu_kick_self(); | |
2776 | } | |
2777 | } | |
2778 | ||
18268b60 PB |
2779 | static void kvm_eat_signals(CPUState *cpu) |
2780 | { | |
2781 | struct timespec ts = { 0, 0 }; | |
2782 | siginfo_t siginfo; | |
2783 | sigset_t waitset; | |
2784 | sigset_t chkset; | |
2785 | int r; | |
2786 | ||
cf0f7cf9 | 2787 | if (kvm_immediate_exit) { |
d73415a3 | 2788 | qatomic_set(&cpu->kvm_run->immediate_exit, 0); |
cf0f7cf9 PB |
2789 | /* Write kvm_run->immediate_exit before the cpu->exit_request |
2790 | * write in kvm_cpu_exec. | |
2791 | */ | |
2792 | smp_wmb(); | |
2793 | return; | |
2794 | } | |
2795 | ||
18268b60 PB |
2796 | sigemptyset(&waitset); |
2797 | sigaddset(&waitset, SIG_IPI); | |
2798 | ||
2799 | do { | |
2800 | r = sigtimedwait(&waitset, &siginfo, &ts); | |
2801 | if (r == -1 && !(errno == EAGAIN || errno == EINTR)) { | |
2802 | perror("sigtimedwait"); | |
2803 | exit(1); | |
2804 | } | |
2805 | ||
2806 | r = sigpending(&chkset); | |
2807 | if (r == -1) { | |
2808 | perror("sigpending"); | |
2809 | exit(1); | |
2810 | } | |
2811 | } while (sigismember(&chkset, SIG_IPI)); | |
2812 | } | |
2813 | ||
1458c363 | 2814 | int kvm_cpu_exec(CPUState *cpu) |
05330448 | 2815 | { |
f7575c96 | 2816 | struct kvm_run *run = cpu->kvm_run; |
7cbb533f | 2817 | int ret, run_ret; |
05330448 | 2818 | |
8c0d577e | 2819 | DPRINTF("kvm_cpu_exec()\n"); |
05330448 | 2820 | |
20d695a9 | 2821 | if (kvm_arch_process_async_events(cpu)) { |
d73415a3 | 2822 | qatomic_set(&cpu->exit_request, 0); |
6792a57b | 2823 | return EXCP_HLT; |
9ccfac9e | 2824 | } |
0af691d7 | 2825 | |
4b8523ee | 2826 | qemu_mutex_unlock_iothread(); |
1d78a3c3 | 2827 | cpu_exec_start(cpu); |
4b8523ee | 2828 | |
9ccfac9e | 2829 | do { |
4c663752 PB |
2830 | MemTxAttrs attrs; |
2831 | ||
99f31832 | 2832 | if (cpu->vcpu_dirty) { |
20d695a9 | 2833 | kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE); |
99f31832 | 2834 | cpu->vcpu_dirty = false; |
4c0960c0 AK |
2835 | } |
2836 | ||
20d695a9 | 2837 | kvm_arch_pre_run(cpu, run); |
d73415a3 | 2838 | if (qatomic_read(&cpu->exit_request)) { |
9ccfac9e JK |
2839 | DPRINTF("interrupt exit requested\n"); |
2840 | /* | |
2841 | * KVM requires us to reenter the kernel after IO exits to complete | |
2842 | * instruction emulation. This self-signal will ensure that we | |
2843 | * leave ASAP again. | |
2844 | */ | |
cf0f7cf9 | 2845 | kvm_cpu_kick_self(); |
9ccfac9e | 2846 | } |
9ccfac9e | 2847 | |
cf0f7cf9 PB |
2848 | /* Read cpu->exit_request before KVM_RUN reads run->immediate_exit. |
2849 | * Matching barrier in kvm_eat_signals. | |
2850 | */ | |
2851 | smp_rmb(); | |
2852 | ||
1bc22652 | 2853 | run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0); |
9ccfac9e | 2854 | |
4c663752 | 2855 | attrs = kvm_arch_post_run(cpu, run); |
05330448 | 2856 | |
2ae41db2 PB |
2857 | #ifdef KVM_HAVE_MCE_INJECTION |
2858 | if (unlikely(have_sigbus_pending)) { | |
2859 | qemu_mutex_lock_iothread(); | |
2860 | kvm_arch_on_sigbus_vcpu(cpu, pending_sigbus_code, | |
2861 | pending_sigbus_addr); | |
2862 | have_sigbus_pending = false; | |
2863 | qemu_mutex_unlock_iothread(); | |
2864 | } | |
2865 | #endif | |
2866 | ||
7cbb533f | 2867 | if (run_ret < 0) { |
dc77d341 JK |
2868 | if (run_ret == -EINTR || run_ret == -EAGAIN) { |
2869 | DPRINTF("io window exit\n"); | |
18268b60 | 2870 | kvm_eat_signals(cpu); |
d73cd8f4 | 2871 | ret = EXCP_INTERRUPT; |
dc77d341 JK |
2872 | break; |
2873 | } | |
7b011fbc ME |
2874 | fprintf(stderr, "error: kvm run failed %s\n", |
2875 | strerror(-run_ret)); | |
dae02ba5 LV |
2876 | #ifdef TARGET_PPC |
2877 | if (run_ret == -EBUSY) { | |
2878 | fprintf(stderr, | |
2879 | "This is probably because your SMT is enabled.\n" | |
2880 | "VCPU can only run on primary threads with all " | |
2881 | "secondary threads offline.\n"); | |
2882 | } | |
2883 | #endif | |
a85e130e PB |
2884 | ret = -1; |
2885 | break; | |
05330448 AL |
2886 | } |
2887 | ||
b76ac80a | 2888 | trace_kvm_run_exit(cpu->cpu_index, run->exit_reason); |
05330448 AL |
2889 | switch (run->exit_reason) { |
2890 | case KVM_EXIT_IO: | |
8c0d577e | 2891 | DPRINTF("handle_io\n"); |
80b7d2ef | 2892 | /* Called outside BQL */ |
4c663752 | 2893 | kvm_handle_io(run->io.port, attrs, |
b30e93e9 JK |
2894 | (uint8_t *)run + run->io.data_offset, |
2895 | run->io.direction, | |
2896 | run->io.size, | |
2897 | run->io.count); | |
d73cd8f4 | 2898 | ret = 0; |
05330448 AL |
2899 | break; |
2900 | case KVM_EXIT_MMIO: | |
8c0d577e | 2901 | DPRINTF("handle_mmio\n"); |
de7ea885 | 2902 | /* Called outside BQL */ |
4c663752 PB |
2903 | address_space_rw(&address_space_memory, |
2904 | run->mmio.phys_addr, attrs, | |
2905 | run->mmio.data, | |
2906 | run->mmio.len, | |
2907 | run->mmio.is_write); | |
d73cd8f4 | 2908 | ret = 0; |
05330448 AL |
2909 | break; |
2910 | case KVM_EXIT_IRQ_WINDOW_OPEN: | |
8c0d577e | 2911 | DPRINTF("irq_window_open\n"); |
d73cd8f4 | 2912 | ret = EXCP_INTERRUPT; |
05330448 AL |
2913 | break; |
2914 | case KVM_EXIT_SHUTDOWN: | |
8c0d577e | 2915 | DPRINTF("shutdown\n"); |
cf83f140 | 2916 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
d73cd8f4 | 2917 | ret = EXCP_INTERRUPT; |
05330448 AL |
2918 | break; |
2919 | case KVM_EXIT_UNKNOWN: | |
bb44e0d1 JK |
2920 | fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", |
2921 | (uint64_t)run->hw.hardware_exit_reason); | |
73aaec4a | 2922 | ret = -1; |
05330448 | 2923 | break; |
7c80eef8 | 2924 | case KVM_EXIT_INTERNAL_ERROR: |
5326ab55 | 2925 | ret = kvm_handle_internal_error(cpu, run); |
7c80eef8 | 2926 | break; |
b4420f19 PX |
2927 | case KVM_EXIT_DIRTY_RING_FULL: |
2928 | /* | |
2929 | * We shouldn't continue if the dirty ring of this vcpu is | |
2930 | * still full. Got kicked by KVM_RESET_DIRTY_RINGS. | |
2931 | */ | |
2932 | trace_kvm_dirty_ring_full(cpu->cpu_index); | |
2933 | qemu_mutex_lock_iothread(); | |
2934 | kvm_dirty_ring_reap(kvm_state); | |
2935 | qemu_mutex_unlock_iothread(); | |
2936 | ret = 0; | |
2937 | break; | |
99040447 PS |
2938 | case KVM_EXIT_SYSTEM_EVENT: |
2939 | switch (run->system_event.type) { | |
2940 | case KVM_SYSTEM_EVENT_SHUTDOWN: | |
cf83f140 | 2941 | qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); |
99040447 PS |
2942 | ret = EXCP_INTERRUPT; |
2943 | break; | |
2944 | case KVM_SYSTEM_EVENT_RESET: | |
cf83f140 | 2945 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
99040447 PS |
2946 | ret = EXCP_INTERRUPT; |
2947 | break; | |
7c207b90 | 2948 | case KVM_SYSTEM_EVENT_CRASH: |
d187e08d | 2949 | kvm_cpu_synchronize_state(cpu); |
7c207b90 | 2950 | qemu_mutex_lock_iothread(); |
c86f106b | 2951 | qemu_system_guest_panicked(cpu_get_crash_info(cpu)); |
7c207b90 AS |
2952 | qemu_mutex_unlock_iothread(); |
2953 | ret = 0; | |
2954 | break; | |
99040447 PS |
2955 | default: |
2956 | DPRINTF("kvm_arch_handle_exit\n"); | |
2957 | ret = kvm_arch_handle_exit(cpu, run); | |
2958 | break; | |
2959 | } | |
2960 | break; | |
05330448 | 2961 | default: |
8c0d577e | 2962 | DPRINTF("kvm_arch_handle_exit\n"); |
20d695a9 | 2963 | ret = kvm_arch_handle_exit(cpu, run); |
05330448 AL |
2964 | break; |
2965 | } | |
d73cd8f4 | 2966 | } while (ret == 0); |
05330448 | 2967 | |
1d78a3c3 | 2968 | cpu_exec_end(cpu); |
4b8523ee JK |
2969 | qemu_mutex_lock_iothread(); |
2970 | ||
73aaec4a | 2971 | if (ret < 0) { |
90c84c56 | 2972 | cpu_dump_state(cpu, stderr, CPU_DUMP_CODE); |
0461d5a6 | 2973 | vm_stop(RUN_STATE_INTERNAL_ERROR); |
becfc390 AL |
2974 | } |
2975 | ||
d73415a3 | 2976 | qatomic_set(&cpu->exit_request, 0); |
05330448 AL |
2977 | return ret; |
2978 | } | |
2979 | ||
984b5181 | 2980 | int kvm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
2981 | { |
2982 | int ret; | |
984b5181 AL |
2983 | void *arg; |
2984 | va_list ap; | |
05330448 | 2985 | |
984b5181 AL |
2986 | va_start(ap, type); |
2987 | arg = va_arg(ap, void *); | |
2988 | va_end(ap); | |
2989 | ||
9c775729 | 2990 | trace_kvm_ioctl(type, arg); |
984b5181 | 2991 | ret = ioctl(s->fd, type, arg); |
a426e122 | 2992 | if (ret == -1) { |
05330448 | 2993 | ret = -errno; |
a426e122 | 2994 | } |
05330448 AL |
2995 | return ret; |
2996 | } | |
2997 | ||
984b5181 | 2998 | int kvm_vm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
2999 | { |
3000 | int ret; | |
984b5181 AL |
3001 | void *arg; |
3002 | va_list ap; | |
3003 | ||
3004 | va_start(ap, type); | |
3005 | arg = va_arg(ap, void *); | |
3006 | va_end(ap); | |
05330448 | 3007 | |
9c775729 | 3008 | trace_kvm_vm_ioctl(type, arg); |
984b5181 | 3009 | ret = ioctl(s->vmfd, type, arg); |
a426e122 | 3010 | if (ret == -1) { |
05330448 | 3011 | ret = -errno; |
a426e122 | 3012 | } |
05330448 AL |
3013 | return ret; |
3014 | } | |
3015 | ||
1bc22652 | 3016 | int kvm_vcpu_ioctl(CPUState *cpu, int type, ...) |
05330448 AL |
3017 | { |
3018 | int ret; | |
984b5181 AL |
3019 | void *arg; |
3020 | va_list ap; | |
3021 | ||
3022 | va_start(ap, type); | |
3023 | arg = va_arg(ap, void *); | |
3024 | va_end(ap); | |
05330448 | 3025 | |
9c775729 | 3026 | trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg); |
8737c51c | 3027 | ret = ioctl(cpu->kvm_fd, type, arg); |
a426e122 | 3028 | if (ret == -1) { |
05330448 | 3029 | ret = -errno; |
a426e122 | 3030 | } |
05330448 AL |
3031 | return ret; |
3032 | } | |
bd322087 | 3033 | |
0a6a7cca CD |
3034 | int kvm_device_ioctl(int fd, int type, ...) |
3035 | { | |
3036 | int ret; | |
3037 | void *arg; | |
3038 | va_list ap; | |
3039 | ||
3040 | va_start(ap, type); | |
3041 | arg = va_arg(ap, void *); | |
3042 | va_end(ap); | |
3043 | ||
3044 | trace_kvm_device_ioctl(fd, type, arg); | |
3045 | ret = ioctl(fd, type, arg); | |
3046 | if (ret == -1) { | |
3047 | ret = -errno; | |
3048 | } | |
3049 | return ret; | |
3050 | } | |
3051 | ||
d0a073a1 DD |
3052 | int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr) |
3053 | { | |
3054 | int ret; | |
3055 | struct kvm_device_attr attribute = { | |
3056 | .group = group, | |
3057 | .attr = attr, | |
3058 | }; | |
3059 | ||
3060 | if (!kvm_vm_attributes_allowed) { | |
3061 | return 0; | |
3062 | } | |
3063 | ||
3064 | ret = kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attribute); | |
3065 | /* kvm returns 0 on success for HAS_DEVICE_ATTR */ | |
3066 | return ret ? 0 : 1; | |
3067 | } | |
3068 | ||
4b3cfe72 PF |
3069 | int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr) |
3070 | { | |
3071 | struct kvm_device_attr attribute = { | |
3072 | .group = group, | |
3073 | .attr = attr, | |
3074 | .flags = 0, | |
3075 | }; | |
3076 | ||
3077 | return kvm_device_ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute) ? 0 : 1; | |
3078 | } | |
3079 | ||
556969e9 EA |
3080 | int kvm_device_access(int fd, int group, uint64_t attr, |
3081 | void *val, bool write, Error **errp) | |
4b3cfe72 PF |
3082 | { |
3083 | struct kvm_device_attr kvmattr; | |
3084 | int err; | |
3085 | ||
3086 | kvmattr.flags = 0; | |
3087 | kvmattr.group = group; | |
3088 | kvmattr.attr = attr; | |
3089 | kvmattr.addr = (uintptr_t)val; | |
3090 | ||
3091 | err = kvm_device_ioctl(fd, | |
3092 | write ? KVM_SET_DEVICE_ATTR : KVM_GET_DEVICE_ATTR, | |
3093 | &kvmattr); | |
3094 | if (err < 0) { | |
556969e9 EA |
3095 | error_setg_errno(errp, -err, |
3096 | "KVM_%s_DEVICE_ATTR failed: Group %d " | |
3097 | "attr 0x%016" PRIx64, | |
3098 | write ? "SET" : "GET", group, attr); | |
4b3cfe72 | 3099 | } |
556969e9 | 3100 | return err; |
4b3cfe72 PF |
3101 | } |
3102 | ||
62dd4eda | 3103 | bool kvm_has_sync_mmu(void) |
bd322087 | 3104 | { |
62dd4eda | 3105 | return kvm_state->sync_mmu; |
bd322087 | 3106 | } |
e22a25c9 | 3107 | |
a0fb002c JK |
3108 | int kvm_has_vcpu_events(void) |
3109 | { | |
3110 | return kvm_state->vcpu_events; | |
3111 | } | |
3112 | ||
b0b1d690 JK |
3113 | int kvm_has_robust_singlestep(void) |
3114 | { | |
3115 | return kvm_state->robust_singlestep; | |
3116 | } | |
3117 | ||
ff44f1a3 JK |
3118 | int kvm_has_debugregs(void) |
3119 | { | |
3120 | return kvm_state->debugregs; | |
3121 | } | |
3122 | ||
ebbfef2f LA |
3123 | int kvm_max_nested_state_length(void) |
3124 | { | |
3125 | return kvm_state->max_nested_state_len; | |
3126 | } | |
3127 | ||
d2f2b8a7 SH |
3128 | int kvm_has_many_ioeventfds(void) |
3129 | { | |
3130 | if (!kvm_enabled()) { | |
3131 | return 0; | |
3132 | } | |
3133 | return kvm_state->many_ioeventfds; | |
3134 | } | |
3135 | ||
84b058d7 JK |
3136 | int kvm_has_gsi_routing(void) |
3137 | { | |
a9c5eb0d | 3138 | #ifdef KVM_CAP_IRQ_ROUTING |
84b058d7 | 3139 | return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING); |
a9c5eb0d AG |
3140 | #else |
3141 | return false; | |
3142 | #endif | |
84b058d7 JK |
3143 | } |
3144 | ||
3ab73842 JK |
3145 | int kvm_has_intx_set_mask(void) |
3146 | { | |
3147 | return kvm_state->intx_set_mask; | |
3148 | } | |
3149 | ||
5d721b78 AG |
3150 | bool kvm_arm_supports_user_irq(void) |
3151 | { | |
3152 | return kvm_check_extension(kvm_state, KVM_CAP_ARM_USER_IRQ); | |
3153 | } | |
3154 | ||
e22a25c9 | 3155 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
a60f24b5 | 3156 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu, |
e22a25c9 AL |
3157 | target_ulong pc) |
3158 | { | |
3159 | struct kvm_sw_breakpoint *bp; | |
3160 | ||
a60f24b5 | 3161 | QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) { |
a426e122 | 3162 | if (bp->pc == pc) { |
e22a25c9 | 3163 | return bp; |
a426e122 | 3164 | } |
e22a25c9 AL |
3165 | } |
3166 | return NULL; | |
3167 | } | |
3168 | ||
a60f24b5 | 3169 | int kvm_sw_breakpoints_active(CPUState *cpu) |
e22a25c9 | 3170 | { |
a60f24b5 | 3171 | return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints); |
e22a25c9 AL |
3172 | } |
3173 | ||
452e4751 GC |
3174 | struct kvm_set_guest_debug_data { |
3175 | struct kvm_guest_debug dbg; | |
452e4751 GC |
3176 | int err; |
3177 | }; | |
3178 | ||
14e6fe12 | 3179 | static void kvm_invoke_set_guest_debug(CPUState *cpu, run_on_cpu_data data) |
452e4751 | 3180 | { |
14e6fe12 PB |
3181 | struct kvm_set_guest_debug_data *dbg_data = |
3182 | (struct kvm_set_guest_debug_data *) data.host_ptr; | |
b3807725 | 3183 | |
3c0ed2a3 | 3184 | dbg_data->err = kvm_vcpu_ioctl(cpu, KVM_SET_GUEST_DEBUG, |
a60f24b5 | 3185 | &dbg_data->dbg); |
452e4751 GC |
3186 | } |
3187 | ||
38e478ec | 3188 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 | 3189 | { |
452e4751 | 3190 | struct kvm_set_guest_debug_data data; |
e22a25c9 | 3191 | |
b0b1d690 | 3192 | data.dbg.control = reinject_trap; |
e22a25c9 | 3193 | |
ed2803da | 3194 | if (cpu->singlestep_enabled) { |
b0b1d690 JK |
3195 | data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
3196 | } | |
20d695a9 | 3197 | kvm_arch_update_guest_debug(cpu, &data.dbg); |
e22a25c9 | 3198 | |
14e6fe12 PB |
3199 | run_on_cpu(cpu, kvm_invoke_set_guest_debug, |
3200 | RUN_ON_CPU_HOST_PTR(&data)); | |
452e4751 | 3201 | return data.err; |
e22a25c9 AL |
3202 | } |
3203 | ||
62278814 | 3204 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
3205 | target_ulong len, int type) |
3206 | { | |
3207 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
3208 | int err; |
3209 | ||
3210 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 3211 | bp = kvm_find_sw_breakpoint(cpu, addr); |
e22a25c9 AL |
3212 | if (bp) { |
3213 | bp->use_count++; | |
3214 | return 0; | |
3215 | } | |
3216 | ||
7267c094 | 3217 | bp = g_malloc(sizeof(struct kvm_sw_breakpoint)); |
e22a25c9 AL |
3218 | bp->pc = addr; |
3219 | bp->use_count = 1; | |
80b7cd73 | 3220 | err = kvm_arch_insert_sw_breakpoint(cpu, bp); |
e22a25c9 | 3221 | if (err) { |
7267c094 | 3222 | g_free(bp); |
e22a25c9 AL |
3223 | return err; |
3224 | } | |
3225 | ||
80b7cd73 | 3226 | QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
e22a25c9 AL |
3227 | } else { |
3228 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); | |
a426e122 | 3229 | if (err) { |
e22a25c9 | 3230 | return err; |
a426e122 | 3231 | } |
e22a25c9 AL |
3232 | } |
3233 | ||
bdc44640 | 3234 | CPU_FOREACH(cpu) { |
38e478ec | 3235 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 3236 | if (err) { |
e22a25c9 | 3237 | return err; |
a426e122 | 3238 | } |
e22a25c9 AL |
3239 | } |
3240 | return 0; | |
3241 | } | |
3242 | ||
62278814 | 3243 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
3244 | target_ulong len, int type) |
3245 | { | |
3246 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
3247 | int err; |
3248 | ||
3249 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 3250 | bp = kvm_find_sw_breakpoint(cpu, addr); |
a426e122 | 3251 | if (!bp) { |
e22a25c9 | 3252 | return -ENOENT; |
a426e122 | 3253 | } |
e22a25c9 AL |
3254 | |
3255 | if (bp->use_count > 1) { | |
3256 | bp->use_count--; | |
3257 | return 0; | |
3258 | } | |
3259 | ||
80b7cd73 | 3260 | err = kvm_arch_remove_sw_breakpoint(cpu, bp); |
a426e122 | 3261 | if (err) { |
e22a25c9 | 3262 | return err; |
a426e122 | 3263 | } |
e22a25c9 | 3264 | |
80b7cd73 | 3265 | QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
7267c094 | 3266 | g_free(bp); |
e22a25c9 AL |
3267 | } else { |
3268 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); | |
a426e122 | 3269 | if (err) { |
e22a25c9 | 3270 | return err; |
a426e122 | 3271 | } |
e22a25c9 AL |
3272 | } |
3273 | ||
bdc44640 | 3274 | CPU_FOREACH(cpu) { |
38e478ec | 3275 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 3276 | if (err) { |
e22a25c9 | 3277 | return err; |
a426e122 | 3278 | } |
e22a25c9 AL |
3279 | } |
3280 | return 0; | |
3281 | } | |
3282 | ||
1d5791f4 | 3283 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
3284 | { |
3285 | struct kvm_sw_breakpoint *bp, *next; | |
80b7cd73 | 3286 | KVMState *s = cpu->kvm_state; |
dc54e252 | 3287 | CPUState *tmpcpu; |
e22a25c9 | 3288 | |
72cf2d4f | 3289 | QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
80b7cd73 | 3290 | if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) { |
e22a25c9 | 3291 | /* Try harder to find a CPU that currently sees the breakpoint. */ |
dc54e252 CG |
3292 | CPU_FOREACH(tmpcpu) { |
3293 | if (kvm_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) { | |
e22a25c9 | 3294 | break; |
a426e122 | 3295 | } |
e22a25c9 AL |
3296 | } |
3297 | } | |
78021d6d JK |
3298 | QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry); |
3299 | g_free(bp); | |
e22a25c9 AL |
3300 | } |
3301 | kvm_arch_remove_all_hw_breakpoints(); | |
3302 | ||
bdc44640 | 3303 | CPU_FOREACH(cpu) { |
38e478ec | 3304 | kvm_update_guest_debug(cpu, 0); |
a426e122 | 3305 | } |
e22a25c9 AL |
3306 | } |
3307 | ||
3308 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ | |
3309 | ||
38e478ec | 3310 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 AL |
3311 | { |
3312 | return -EINVAL; | |
3313 | } | |
3314 | ||
62278814 | 3315 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
3316 | target_ulong len, int type) |
3317 | { | |
3318 | return -EINVAL; | |
3319 | } | |
3320 | ||
62278814 | 3321 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
3322 | target_ulong len, int type) |
3323 | { | |
3324 | return -EINVAL; | |
3325 | } | |
3326 | ||
1d5791f4 | 3327 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
3328 | { |
3329 | } | |
3330 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ | |
cc84de95 | 3331 | |
18268b60 | 3332 | static int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset) |
cc84de95 | 3333 | { |
aed6efb9 | 3334 | KVMState *s = kvm_state; |
cc84de95 MT |
3335 | struct kvm_signal_mask *sigmask; |
3336 | int r; | |
3337 | ||
7267c094 | 3338 | sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset)); |
cc84de95 | 3339 | |
aed6efb9 | 3340 | sigmask->len = s->sigmask_len; |
cc84de95 | 3341 | memcpy(sigmask->sigset, sigset, sizeof(*sigset)); |
1bc22652 | 3342 | r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask); |
7267c094 | 3343 | g_free(sigmask); |
cc84de95 MT |
3344 | |
3345 | return r; | |
3346 | } | |
4d39892c | 3347 | |
cf0f7cf9 | 3348 | static void kvm_ipi_signal(int sig) |
18268b60 | 3349 | { |
cf0f7cf9 PB |
3350 | if (current_cpu) { |
3351 | assert(kvm_immediate_exit); | |
3352 | kvm_cpu_kick(current_cpu); | |
3353 | } | |
18268b60 PB |
3354 | } |
3355 | ||
3356 | void kvm_init_cpu_signals(CPUState *cpu) | |
3357 | { | |
3358 | int r; | |
3359 | sigset_t set; | |
3360 | struct sigaction sigact; | |
3361 | ||
3362 | memset(&sigact, 0, sizeof(sigact)); | |
cf0f7cf9 | 3363 | sigact.sa_handler = kvm_ipi_signal; |
18268b60 PB |
3364 | sigaction(SIG_IPI, &sigact, NULL); |
3365 | ||
3366 | pthread_sigmask(SIG_BLOCK, NULL, &set); | |
3367 | #if defined KVM_HAVE_MCE_INJECTION | |
3368 | sigdelset(&set, SIGBUS); | |
3369 | pthread_sigmask(SIG_SETMASK, &set, NULL); | |
3370 | #endif | |
3371 | sigdelset(&set, SIG_IPI); | |
cf0f7cf9 PB |
3372 | if (kvm_immediate_exit) { |
3373 | r = pthread_sigmask(SIG_SETMASK, &set, NULL); | |
3374 | } else { | |
3375 | r = kvm_set_signal_mask(cpu, &set); | |
3376 | } | |
18268b60 PB |
3377 | if (r) { |
3378 | fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r)); | |
3379 | exit(1); | |
3380 | } | |
3381 | } | |
3382 | ||
2ae41db2 | 3383 | /* Called asynchronously in VCPU thread. */ |
290adf38 | 3384 | int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) |
a1b87fe0 | 3385 | { |
2ae41db2 PB |
3386 | #ifdef KVM_HAVE_MCE_INJECTION |
3387 | if (have_sigbus_pending) { | |
3388 | return 1; | |
3389 | } | |
3390 | have_sigbus_pending = true; | |
3391 | pending_sigbus_addr = addr; | |
3392 | pending_sigbus_code = code; | |
d73415a3 | 3393 | qatomic_set(&cpu->exit_request, 1); |
2ae41db2 PB |
3394 | return 0; |
3395 | #else | |
3396 | return 1; | |
3397 | #endif | |
a1b87fe0 JK |
3398 | } |
3399 | ||
2ae41db2 | 3400 | /* Called synchronously (via signalfd) in main thread. */ |
a1b87fe0 JK |
3401 | int kvm_on_sigbus(int code, void *addr) |
3402 | { | |
2ae41db2 | 3403 | #ifdef KVM_HAVE_MCE_INJECTION |
4d39892c PB |
3404 | /* Action required MCE kills the process if SIGBUS is blocked. Because |
3405 | * that's what happens in the I/O thread, where we handle MCE via signalfd, | |
3406 | * we can only get action optional here. | |
3407 | */ | |
3408 | assert(code != BUS_MCEERR_AR); | |
3409 | kvm_arch_on_sigbus_vcpu(first_cpu, code, addr); | |
3410 | return 0; | |
2ae41db2 PB |
3411 | #else |
3412 | return 1; | |
3413 | #endif | |
a1b87fe0 | 3414 | } |
0a6a7cca CD |
3415 | |
3416 | int kvm_create_device(KVMState *s, uint64_t type, bool test) | |
3417 | { | |
3418 | int ret; | |
3419 | struct kvm_create_device create_dev; | |
3420 | ||
3421 | create_dev.type = type; | |
3422 | create_dev.fd = -1; | |
3423 | create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0; | |
3424 | ||
3425 | if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) { | |
3426 | return -ENOTSUP; | |
3427 | } | |
3428 | ||
3429 | ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev); | |
3430 | if (ret) { | |
3431 | return ret; | |
3432 | } | |
3433 | ||
3434 | return test ? 0 : create_dev.fd; | |
3435 | } | |
ada4135f | 3436 | |
29039acf PX |
3437 | bool kvm_device_supported(int vmfd, uint64_t type) |
3438 | { | |
3439 | struct kvm_create_device create_dev = { | |
3440 | .type = type, | |
3441 | .fd = -1, | |
3442 | .flags = KVM_CREATE_DEVICE_TEST, | |
3443 | }; | |
3444 | ||
3445 | if (ioctl(vmfd, KVM_CHECK_EXTENSION, KVM_CAP_DEVICE_CTRL) <= 0) { | |
3446 | return false; | |
3447 | } | |
3448 | ||
3449 | return (ioctl(vmfd, KVM_CREATE_DEVICE, &create_dev) >= 0); | |
3450 | } | |
3451 | ||
ada4135f CH |
3452 | int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source) |
3453 | { | |
3454 | struct kvm_one_reg reg; | |
3455 | int r; | |
3456 | ||
3457 | reg.id = id; | |
3458 | reg.addr = (uintptr_t) source; | |
3459 | r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); | |
3460 | if (r) { | |
844a3d34 | 3461 | trace_kvm_failed_reg_set(id, strerror(-r)); |
ada4135f CH |
3462 | } |
3463 | return r; | |
3464 | } | |
3465 | ||
3466 | int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target) | |
3467 | { | |
3468 | struct kvm_one_reg reg; | |
3469 | int r; | |
3470 | ||
3471 | reg.id = id; | |
3472 | reg.addr = (uintptr_t) target; | |
3473 | r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); | |
3474 | if (r) { | |
844a3d34 | 3475 | trace_kvm_failed_reg_get(id, strerror(-r)); |
ada4135f CH |
3476 | } |
3477 | return r; | |
3478 | } | |
782c3f29 | 3479 | |
8072aae3 AK |
3480 | static bool kvm_accel_has_memory(MachineState *ms, AddressSpace *as, |
3481 | hwaddr start_addr, hwaddr size) | |
3482 | { | |
3483 | KVMState *kvm = KVM_STATE(ms->accelerator); | |
3484 | int i; | |
3485 | ||
3486 | for (i = 0; i < kvm->nr_as; ++i) { | |
3487 | if (kvm->as[i].as == as && kvm->as[i].ml) { | |
023ae9a8 | 3488 | size = MIN(kvm_max_slot_size, size); |
8072aae3 AK |
3489 | return NULL != kvm_lookup_matching_slot(kvm->as[i].ml, |
3490 | start_addr, size); | |
3491 | } | |
3492 | } | |
3493 | ||
3494 | return false; | |
3495 | } | |
3496 | ||
23b0898e PB |
3497 | static void kvm_get_kvm_shadow_mem(Object *obj, Visitor *v, |
3498 | const char *name, void *opaque, | |
3499 | Error **errp) | |
3500 | { | |
3501 | KVMState *s = KVM_STATE(obj); | |
3502 | int64_t value = s->kvm_shadow_mem; | |
3503 | ||
3504 | visit_type_int(v, name, &value, errp); | |
3505 | } | |
3506 | ||
3507 | static void kvm_set_kvm_shadow_mem(Object *obj, Visitor *v, | |
3508 | const char *name, void *opaque, | |
3509 | Error **errp) | |
3510 | { | |
3511 | KVMState *s = KVM_STATE(obj); | |
23b0898e PB |
3512 | int64_t value; |
3513 | ||
70cbae42 PB |
3514 | if (s->fd != -1) { |
3515 | error_setg(errp, "Cannot set properties after the accelerator has been initialized"); | |
3516 | return; | |
3517 | } | |
3518 | ||
668f62ec | 3519 | if (!visit_type_int(v, name, &value, errp)) { |
23b0898e PB |
3520 | return; |
3521 | } | |
3522 | ||
3523 | s->kvm_shadow_mem = value; | |
3524 | } | |
3525 | ||
11bc4a13 PB |
3526 | static void kvm_set_kernel_irqchip(Object *obj, Visitor *v, |
3527 | const char *name, void *opaque, | |
3528 | Error **errp) | |
3529 | { | |
11bc4a13 PB |
3530 | KVMState *s = KVM_STATE(obj); |
3531 | OnOffSplit mode; | |
3532 | ||
70cbae42 PB |
3533 | if (s->fd != -1) { |
3534 | error_setg(errp, "Cannot set properties after the accelerator has been initialized"); | |
3535 | return; | |
3536 | } | |
3537 | ||
14217038 | 3538 | if (!visit_type_OnOffSplit(v, name, &mode, errp)) { |
11bc4a13 | 3539 | return; |
14217038 MA |
3540 | } |
3541 | switch (mode) { | |
3542 | case ON_OFF_SPLIT_ON: | |
3543 | s->kernel_irqchip_allowed = true; | |
3544 | s->kernel_irqchip_required = true; | |
3545 | s->kernel_irqchip_split = ON_OFF_AUTO_OFF; | |
3546 | break; | |
3547 | case ON_OFF_SPLIT_OFF: | |
3548 | s->kernel_irqchip_allowed = false; | |
3549 | s->kernel_irqchip_required = false; | |
3550 | s->kernel_irqchip_split = ON_OFF_AUTO_OFF; | |
3551 | break; | |
3552 | case ON_OFF_SPLIT_SPLIT: | |
3553 | s->kernel_irqchip_allowed = true; | |
3554 | s->kernel_irqchip_required = true; | |
3555 | s->kernel_irqchip_split = ON_OFF_AUTO_ON; | |
3556 | break; | |
3557 | default: | |
3558 | /* The value was checked in visit_type_OnOffSplit() above. If | |
3559 | * we get here, then something is wrong in QEMU. | |
3560 | */ | |
3561 | abort(); | |
11bc4a13 PB |
3562 | } |
3563 | } | |
3564 | ||
4376c40d PB |
3565 | bool kvm_kernel_irqchip_allowed(void) |
3566 | { | |
11bc4a13 | 3567 | return kvm_state->kernel_irqchip_allowed; |
4376c40d PB |
3568 | } |
3569 | ||
3570 | bool kvm_kernel_irqchip_required(void) | |
3571 | { | |
11bc4a13 | 3572 | return kvm_state->kernel_irqchip_required; |
4376c40d PB |
3573 | } |
3574 | ||
3575 | bool kvm_kernel_irqchip_split(void) | |
3576 | { | |
d1972be1 | 3577 | return kvm_state->kernel_irqchip_split == ON_OFF_AUTO_ON; |
4376c40d PB |
3578 | } |
3579 | ||
2ea5cb0a PX |
3580 | static void kvm_get_dirty_ring_size(Object *obj, Visitor *v, |
3581 | const char *name, void *opaque, | |
3582 | Error **errp) | |
3583 | { | |
3584 | KVMState *s = KVM_STATE(obj); | |
3585 | uint32_t value = s->kvm_dirty_ring_size; | |
3586 | ||
3587 | visit_type_uint32(v, name, &value, errp); | |
3588 | } | |
3589 | ||
3590 | static void kvm_set_dirty_ring_size(Object *obj, Visitor *v, | |
3591 | const char *name, void *opaque, | |
3592 | Error **errp) | |
3593 | { | |
3594 | KVMState *s = KVM_STATE(obj); | |
3595 | Error *error = NULL; | |
3596 | uint32_t value; | |
3597 | ||
3598 | if (s->fd != -1) { | |
3599 | error_setg(errp, "Cannot set properties after the accelerator has been initialized"); | |
3600 | return; | |
3601 | } | |
3602 | ||
3603 | visit_type_uint32(v, name, &value, &error); | |
3604 | if (error) { | |
3605 | error_propagate(errp, error); | |
3606 | return; | |
3607 | } | |
3608 | if (value & (value - 1)) { | |
3609 | error_setg(errp, "dirty-ring-size must be a power of two."); | |
3610 | return; | |
3611 | } | |
3612 | ||
3613 | s->kvm_dirty_ring_size = value; | |
3614 | } | |
3615 | ||
23b0898e PB |
3616 | static void kvm_accel_instance_init(Object *obj) |
3617 | { | |
3618 | KVMState *s = KVM_STATE(obj); | |
3619 | ||
70cbae42 PB |
3620 | s->fd = -1; |
3621 | s->vmfd = -1; | |
23b0898e | 3622 | s->kvm_shadow_mem = -1; |
d1972be1 XL |
3623 | s->kernel_irqchip_allowed = true; |
3624 | s->kernel_irqchip_split = ON_OFF_AUTO_AUTO; | |
2ea5cb0a PX |
3625 | /* KVM dirty ring is by default off */ |
3626 | s->kvm_dirty_ring_size = 0; | |
23b0898e PB |
3627 | } |
3628 | ||
782c3f29 EH |
3629 | static void kvm_accel_class_init(ObjectClass *oc, void *data) |
3630 | { | |
3631 | AccelClass *ac = ACCEL_CLASS(oc); | |
3632 | ac->name = "KVM"; | |
0d15da8e | 3633 | ac->init_machine = kvm_init; |
8072aae3 | 3634 | ac->has_memory = kvm_accel_has_memory; |
782c3f29 | 3635 | ac->allowed = &kvm_allowed; |
23b0898e | 3636 | |
11bc4a13 PB |
3637 | object_class_property_add(oc, "kernel-irqchip", "on|off|split", |
3638 | NULL, kvm_set_kernel_irqchip, | |
d2623129 | 3639 | NULL, NULL); |
11bc4a13 | 3640 | object_class_property_set_description(oc, "kernel-irqchip", |
7eecec7d | 3641 | "Configure KVM in-kernel irqchip"); |
11bc4a13 | 3642 | |
23b0898e PB |
3643 | object_class_property_add(oc, "kvm-shadow-mem", "int", |
3644 | kvm_get_kvm_shadow_mem, kvm_set_kvm_shadow_mem, | |
d2623129 | 3645 | NULL, NULL); |
23b0898e | 3646 | object_class_property_set_description(oc, "kvm-shadow-mem", |
7eecec7d | 3647 | "KVM shadow MMU size"); |
2ea5cb0a PX |
3648 | |
3649 | object_class_property_add(oc, "dirty-ring-size", "uint32", | |
3650 | kvm_get_dirty_ring_size, kvm_set_dirty_ring_size, | |
3651 | NULL, NULL); | |
3652 | object_class_property_set_description(oc, "dirty-ring-size", | |
3653 | "Size of KVM dirty page ring buffer (default: 0, i.e. use bitmap)"); | |
782c3f29 EH |
3654 | } |
3655 | ||
3656 | static const TypeInfo kvm_accel_type = { | |
3657 | .name = TYPE_KVM_ACCEL, | |
3658 | .parent = TYPE_ACCEL, | |
23b0898e | 3659 | .instance_init = kvm_accel_instance_init, |
782c3f29 | 3660 | .class_init = kvm_accel_class_init, |
fc02086b | 3661 | .instance_size = sizeof(KVMState), |
782c3f29 EH |
3662 | }; |
3663 | ||
3664 | static void kvm_type_init(void) | |
3665 | { | |
3666 | type_register_static(&kvm_accel_type); | |
3667 | } | |
3668 | ||
3669 | type_init(kvm_type_init); |