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Commit | Line | Data |
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05330448 AL |
1 | /* |
2 | * QEMU KVM support | |
3 | * | |
4 | * Copyright IBM, Corp. 2008 | |
5832d1f2 | 5 | * Red Hat, Inc. 2008 |
05330448 AL |
6 | * |
7 | * Authors: | |
8 | * Anthony Liguori <aliguori@us.ibm.com> | |
5832d1f2 | 9 | * Glauber Costa <gcosta@redhat.com> |
05330448 AL |
10 | * |
11 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
12 | * See the COPYING file in the top-level directory. | |
13 | * | |
14 | */ | |
15 | ||
d38ea87a | 16 | #include "qemu/osdep.h" |
05330448 | 17 | #include <sys/ioctl.h> |
05330448 AL |
18 | |
19 | #include <linux/kvm.h> | |
20 | ||
1de7afc9 PB |
21 | #include "qemu/atomic.h" |
22 | #include "qemu/option.h" | |
23 | #include "qemu/config-file.h" | |
4b3cfe72 | 24 | #include "qemu/error-report.h" |
556969e9 | 25 | #include "qapi/error.h" |
a2cb15b0 | 26 | #include "hw/pci/msi.h" |
d1f6af6a | 27 | #include "hw/pci/msix.h" |
d426d9fb | 28 | #include "hw/s390x/adapter.h" |
022c62cb | 29 | #include "exec/gdbstub.h" |
8571ed35 | 30 | #include "sysemu/kvm_int.h" |
54d31236 | 31 | #include "sysemu/runstate.h" |
d2528bdc | 32 | #include "sysemu/cpus.h" |
1de7afc9 | 33 | #include "qemu/bswap.h" |
022c62cb | 34 | #include "exec/memory.h" |
747afd5b | 35 | #include "exec/ram_addr.h" |
1de7afc9 | 36 | #include "qemu/event_notifier.h" |
db725815 | 37 | #include "qemu/main-loop.h" |
92229a57 | 38 | #include "trace.h" |
197e3524 | 39 | #include "hw/irq.h" |
23b0898e | 40 | #include "qapi/visitor.h" |
11bc4a13 PB |
41 | #include "qapi/qapi-types-common.h" |
42 | #include "qapi/qapi-visit-common.h" | |
6b552b9b | 43 | #include "sysemu/reset.h" |
57038a92 CF |
44 | #include "qemu/guest-random.h" |
45 | #include "sysemu/hw_accel.h" | |
46 | #include "kvm-cpus.h" | |
05330448 | 47 | |
135a129a AK |
48 | #include "hw/boards.h" |
49 | ||
d2f2b8a7 SH |
50 | /* This check must be after config-host.h is included */ |
51 | #ifdef CONFIG_EVENTFD | |
52 | #include <sys/eventfd.h> | |
53 | #endif | |
54 | ||
bc92e4e9 AJ |
55 | /* KVM uses PAGE_SIZE in its definition of KVM_COALESCED_MMIO_MAX. We |
56 | * need to use the real host PAGE_SIZE, as that's what KVM will use. | |
57 | */ | |
eb8b1a79 JY |
58 | #ifdef PAGE_SIZE |
59 | #undef PAGE_SIZE | |
60 | #endif | |
038adc2f | 61 | #define PAGE_SIZE qemu_real_host_page_size |
f65ed4c1 | 62 | |
05330448 AL |
63 | //#define DEBUG_KVM |
64 | ||
65 | #ifdef DEBUG_KVM | |
8c0d577e | 66 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
67 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
68 | #else | |
8c0d577e | 69 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
70 | do { } while (0) |
71 | #endif | |
72 | ||
04fa27f5 JK |
73 | #define KVM_MSI_HASHTAB_SIZE 256 |
74 | ||
4c055ab5 GZ |
75 | struct KVMParkedVcpu { |
76 | unsigned long vcpu_id; | |
77 | int kvm_fd; | |
78 | QLIST_ENTRY(KVMParkedVcpu) node; | |
79 | }; | |
80 | ||
9d1c35df | 81 | struct KVMState |
05330448 | 82 | { |
fc02086b EH |
83 | AccelState parent_obj; |
84 | ||
fb541ca5 | 85 | int nr_slots; |
05330448 AL |
86 | int fd; |
87 | int vmfd; | |
f65ed4c1 | 88 | int coalesced_mmio; |
e6d34aee | 89 | int coalesced_pio; |
62a2744c | 90 | struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; |
1cae88b9 | 91 | bool coalesced_flush_in_progress; |
a0fb002c | 92 | int vcpu_events; |
b0b1d690 | 93 | int robust_singlestep; |
ff44f1a3 | 94 | int debugregs; |
e22a25c9 | 95 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
b58deb34 | 96 | QTAILQ_HEAD(, kvm_sw_breakpoint) kvm_sw_breakpoints; |
e22a25c9 | 97 | #endif |
ebbfef2f | 98 | int max_nested_state_len; |
d2f2b8a7 | 99 | int many_ioeventfds; |
3ab73842 | 100 | int intx_set_mask; |
23b0898e | 101 | int kvm_shadow_mem; |
11bc4a13 PB |
102 | bool kernel_irqchip_allowed; |
103 | bool kernel_irqchip_required; | |
d1972be1 | 104 | OnOffAuto kernel_irqchip_split; |
62dd4eda | 105 | bool sync_mmu; |
494cd11d | 106 | uint64_t manual_dirty_log_protect; |
92e4b519 DG |
107 | /* The man page (and posix) say ioctl numbers are signed int, but |
108 | * they're not. Linux, glibc and *BSD all treat ioctl numbers as | |
109 | * unsigned, and treating them as signed here can break things */ | |
e333cd69 | 110 | unsigned irq_set_ioctl; |
aed6efb9 | 111 | unsigned int sigmask_len; |
197e3524 | 112 | GHashTable *gsimap; |
84b058d7 JK |
113 | #ifdef KVM_CAP_IRQ_ROUTING |
114 | struct kvm_irq_routing *irq_routes; | |
115 | int nr_allocated_irq_routes; | |
8269fb70 | 116 | unsigned long *used_gsi_bitmap; |
4e2e4e63 | 117 | unsigned int gsi_count; |
b58deb34 | 118 | QTAILQ_HEAD(, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE]; |
84b058d7 | 119 | #endif |
7bbda04c | 120 | KVMMemoryListener memory_listener; |
4c055ab5 | 121 | QLIST_HEAD(, KVMParkedVcpu) kvm_parked_vcpus; |
b20e3780 | 122 | |
8072aae3 AK |
123 | /* For "info mtree -f" to tell if an MR is registered in KVM */ |
124 | int nr_as; | |
125 | struct KVMAs { | |
126 | KVMMemoryListener *ml; | |
127 | AddressSpace *as; | |
128 | } *as; | |
9d1c35df | 129 | }; |
05330448 | 130 | |
6a7af8cb | 131 | KVMState *kvm_state; |
3d4b2649 | 132 | bool kvm_kernel_irqchip; |
15eafc2e | 133 | bool kvm_split_irqchip; |
7ae26bd4 | 134 | bool kvm_async_interrupts_allowed; |
215e79c0 | 135 | bool kvm_halt_in_kernel_allowed; |
69e03ae6 | 136 | bool kvm_eventfds_allowed; |
cc7e0ddf | 137 | bool kvm_irqfds_allowed; |
f41389ae | 138 | bool kvm_resamplefds_allowed; |
614e41bc | 139 | bool kvm_msi_via_irqfd_allowed; |
f3e1bed8 | 140 | bool kvm_gsi_routing_allowed; |
76fe21de | 141 | bool kvm_gsi_direct_mapping; |
13eed94e | 142 | bool kvm_allowed; |
df9c8b75 | 143 | bool kvm_readonly_mem_allowed; |
d0a073a1 | 144 | bool kvm_vm_attributes_allowed; |
50bf31b9 | 145 | bool kvm_direct_msi_allowed; |
35108223 | 146 | bool kvm_ioeventfd_any_length_allowed; |
767a554a | 147 | bool kvm_msi_use_devid; |
cf0f7cf9 | 148 | static bool kvm_immediate_exit; |
023ae9a8 | 149 | static hwaddr kvm_max_slot_size = ~0; |
05330448 | 150 | |
94a8d39a JK |
151 | static const KVMCapabilityInfo kvm_required_capabilites[] = { |
152 | KVM_CAP_INFO(USER_MEMORY), | |
153 | KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS), | |
89de4b91 | 154 | KVM_CAP_INFO(JOIN_MEMORY_REGIONS_WORKS), |
94a8d39a JK |
155 | KVM_CAP_LAST_INFO |
156 | }; | |
157 | ||
3607715a DG |
158 | static NotifierList kvm_irqchip_change_notifiers = |
159 | NOTIFIER_LIST_INITIALIZER(kvm_irqchip_change_notifiers); | |
160 | ||
c82d9d43 PX |
161 | struct KVMResampleFd { |
162 | int gsi; | |
163 | EventNotifier *resample_event; | |
164 | QLIST_ENTRY(KVMResampleFd) node; | |
165 | }; | |
166 | typedef struct KVMResampleFd KVMResampleFd; | |
167 | ||
168 | /* | |
169 | * Only used with split irqchip where we need to do the resample fd | |
170 | * kick for the kernel from userspace. | |
171 | */ | |
172 | static QLIST_HEAD(, KVMResampleFd) kvm_resample_fd_list = | |
173 | QLIST_HEAD_INITIALIZER(kvm_resample_fd_list); | |
174 | ||
a2f77862 PX |
175 | static QemuMutex kml_slots_lock; |
176 | ||
177 | #define kvm_slots_lock() qemu_mutex_lock(&kml_slots_lock) | |
178 | #define kvm_slots_unlock() qemu_mutex_unlock(&kml_slots_lock) | |
36adac49 | 179 | |
ea776d15 PX |
180 | static void kvm_slot_init_dirty_bitmap(KVMSlot *mem); |
181 | ||
c82d9d43 PX |
182 | static inline void kvm_resample_fd_remove(int gsi) |
183 | { | |
184 | KVMResampleFd *rfd; | |
185 | ||
186 | QLIST_FOREACH(rfd, &kvm_resample_fd_list, node) { | |
187 | if (rfd->gsi == gsi) { | |
188 | QLIST_REMOVE(rfd, node); | |
189 | g_free(rfd); | |
190 | break; | |
191 | } | |
192 | } | |
193 | } | |
194 | ||
195 | static inline void kvm_resample_fd_insert(int gsi, EventNotifier *event) | |
196 | { | |
197 | KVMResampleFd *rfd = g_new0(KVMResampleFd, 1); | |
198 | ||
199 | rfd->gsi = gsi; | |
200 | rfd->resample_event = event; | |
201 | ||
202 | QLIST_INSERT_HEAD(&kvm_resample_fd_list, rfd, node); | |
203 | } | |
204 | ||
205 | void kvm_resample_fd_notify(int gsi) | |
206 | { | |
207 | KVMResampleFd *rfd; | |
208 | ||
209 | QLIST_FOREACH(rfd, &kvm_resample_fd_list, node) { | |
210 | if (rfd->gsi == gsi) { | |
211 | event_notifier_set(rfd->resample_event); | |
212 | trace_kvm_resample_fd_notify(gsi); | |
213 | return; | |
214 | } | |
215 | } | |
216 | } | |
217 | ||
44f2e6c1 BR |
218 | int kvm_get_max_memslots(void) |
219 | { | |
4f7f5893 | 220 | KVMState *s = KVM_STATE(current_accel()); |
44f2e6c1 BR |
221 | |
222 | return s->nr_slots; | |
223 | } | |
224 | ||
36adac49 | 225 | /* Called with KVMMemoryListener.slots_lock held */ |
7bbda04c | 226 | static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml) |
05330448 | 227 | { |
7bbda04c | 228 | KVMState *s = kvm_state; |
05330448 AL |
229 | int i; |
230 | ||
fb541ca5 | 231 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c PB |
232 | if (kml->slots[i].memory_size == 0) { |
233 | return &kml->slots[i]; | |
a426e122 | 234 | } |
05330448 AL |
235 | } |
236 | ||
b8865591 IM |
237 | return NULL; |
238 | } | |
239 | ||
240 | bool kvm_has_free_slot(MachineState *ms) | |
241 | { | |
7bbda04c | 242 | KVMState *s = KVM_STATE(ms->accelerator); |
36adac49 PX |
243 | bool result; |
244 | KVMMemoryListener *kml = &s->memory_listener; | |
245 | ||
a2f77862 | 246 | kvm_slots_lock(); |
36adac49 | 247 | result = !!kvm_get_free_slot(kml); |
a2f77862 | 248 | kvm_slots_unlock(); |
7bbda04c | 249 | |
36adac49 | 250 | return result; |
b8865591 IM |
251 | } |
252 | ||
36adac49 | 253 | /* Called with KVMMemoryListener.slots_lock held */ |
7bbda04c | 254 | static KVMSlot *kvm_alloc_slot(KVMMemoryListener *kml) |
b8865591 | 255 | { |
7bbda04c | 256 | KVMSlot *slot = kvm_get_free_slot(kml); |
b8865591 IM |
257 | |
258 | if (slot) { | |
259 | return slot; | |
260 | } | |
261 | ||
d3f8d37f AL |
262 | fprintf(stderr, "%s: no free slot available\n", __func__); |
263 | abort(); | |
264 | } | |
265 | ||
7bbda04c | 266 | static KVMSlot *kvm_lookup_matching_slot(KVMMemoryListener *kml, |
a8170e5e | 267 | hwaddr start_addr, |
2747e716 | 268 | hwaddr size) |
d3f8d37f | 269 | { |
7bbda04c | 270 | KVMState *s = kvm_state; |
d3f8d37f AL |
271 | int i; |
272 | ||
fb541ca5 | 273 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c | 274 | KVMSlot *mem = &kml->slots[i]; |
d3f8d37f | 275 | |
2747e716 | 276 | if (start_addr == mem->start_addr && size == mem->memory_size) { |
d3f8d37f AL |
277 | return mem; |
278 | } | |
279 | } | |
280 | ||
05330448 AL |
281 | return NULL; |
282 | } | |
283 | ||
5ea69c2e DH |
284 | /* |
285 | * Calculate and align the start address and the size of the section. | |
286 | * Return the size. If the size is 0, the aligned section is empty. | |
287 | */ | |
288 | static hwaddr kvm_align_section(MemoryRegionSection *section, | |
289 | hwaddr *start) | |
290 | { | |
291 | hwaddr size = int128_get64(section->size); | |
a6ffc423 | 292 | hwaddr delta, aligned; |
5ea69c2e DH |
293 | |
294 | /* kvm works in page size chunks, but the function may be called | |
295 | with sub-page size and unaligned start address. Pad the start | |
296 | address to next and truncate size to previous page boundary. */ | |
a6ffc423 DH |
297 | aligned = ROUND_UP(section->offset_within_address_space, |
298 | qemu_real_host_page_size); | |
299 | delta = aligned - section->offset_within_address_space; | |
300 | *start = aligned; | |
5ea69c2e DH |
301 | if (delta > size) { |
302 | return 0; | |
303 | } | |
5ea69c2e | 304 | |
a6ffc423 | 305 | return (size - delta) & qemu_real_host_page_mask; |
5ea69c2e DH |
306 | } |
307 | ||
9f213ed9 | 308 | int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, |
a8170e5e | 309 | hwaddr *phys_addr) |
983dfc3b | 310 | { |
7bbda04c | 311 | KVMMemoryListener *kml = &s->memory_listener; |
36adac49 | 312 | int i, ret = 0; |
983dfc3b | 313 | |
a2f77862 | 314 | kvm_slots_lock(); |
fb541ca5 | 315 | for (i = 0; i < s->nr_slots; i++) { |
7bbda04c | 316 | KVMSlot *mem = &kml->slots[i]; |
983dfc3b | 317 | |
9f213ed9 AK |
318 | if (ram >= mem->ram && ram < mem->ram + mem->memory_size) { |
319 | *phys_addr = mem->start_addr + (ram - mem->ram); | |
36adac49 PX |
320 | ret = 1; |
321 | break; | |
983dfc3b HY |
322 | } |
323 | } | |
a2f77862 | 324 | kvm_slots_unlock(); |
983dfc3b | 325 | |
36adac49 | 326 | return ret; |
983dfc3b HY |
327 | } |
328 | ||
6c090d4a | 329 | static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot, bool new) |
5832d1f2 | 330 | { |
7bbda04c | 331 | KVMState *s = kvm_state; |
5832d1f2 | 332 | struct kvm_userspace_memory_region mem; |
fe29141b | 333 | int ret; |
5832d1f2 | 334 | |
38bfe691 | 335 | mem.slot = slot->slot | (kml->as_id << 16); |
5832d1f2 | 336 | mem.guest_phys_addr = slot->start_addr; |
9f213ed9 | 337 | mem.userspace_addr = (unsigned long)slot->ram; |
5832d1f2 | 338 | mem.flags = slot->flags; |
651eb0f4 | 339 | |
6c090d4a | 340 | if (slot->memory_size && !new && (mem.flags ^ slot->old_flags) & KVM_MEM_READONLY) { |
235e8982 JJ |
341 | /* Set the slot size to 0 before setting the slot to the desired |
342 | * value. This is needed based on KVM commit 75d61fbc. */ | |
343 | mem.memory_size = 0; | |
88cd34ee PMD |
344 | ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); |
345 | if (ret < 0) { | |
346 | goto err; | |
347 | } | |
235e8982 JJ |
348 | } |
349 | mem.memory_size = slot->memory_size; | |
fe29141b | 350 | ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); |
6c090d4a | 351 | slot->old_flags = mem.flags; |
88cd34ee | 352 | err: |
fe29141b AK |
353 | trace_kvm_set_user_memory(mem.slot, mem.flags, mem.guest_phys_addr, |
354 | mem.memory_size, mem.userspace_addr, ret); | |
88cd34ee PMD |
355 | if (ret < 0) { |
356 | error_report("%s: KVM_SET_USER_MEMORY_REGION failed, slot=%d," | |
357 | " start=0x%" PRIx64 ", size=0x%" PRIx64 ": %s", | |
358 | __func__, mem.slot, slot->start_addr, | |
359 | (uint64_t)mem.memory_size, strerror(errno)); | |
360 | } | |
fe29141b | 361 | return ret; |
5832d1f2 AL |
362 | } |
363 | ||
57038a92 | 364 | static int do_kvm_destroy_vcpu(CPUState *cpu) |
4c055ab5 GZ |
365 | { |
366 | KVMState *s = kvm_state; | |
367 | long mmap_size; | |
368 | struct KVMParkedVcpu *vcpu = NULL; | |
369 | int ret = 0; | |
370 | ||
371 | DPRINTF("kvm_destroy_vcpu\n"); | |
372 | ||
b1115c99 LA |
373 | ret = kvm_arch_destroy_vcpu(cpu); |
374 | if (ret < 0) { | |
375 | goto err; | |
376 | } | |
377 | ||
4c055ab5 GZ |
378 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); |
379 | if (mmap_size < 0) { | |
380 | ret = mmap_size; | |
381 | DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); | |
382 | goto err; | |
383 | } | |
384 | ||
385 | ret = munmap(cpu->kvm_run, mmap_size); | |
386 | if (ret < 0) { | |
387 | goto err; | |
388 | } | |
389 | ||
390 | vcpu = g_malloc0(sizeof(*vcpu)); | |
391 | vcpu->vcpu_id = kvm_arch_vcpu_id(cpu); | |
392 | vcpu->kvm_fd = cpu->kvm_fd; | |
393 | QLIST_INSERT_HEAD(&kvm_state->kvm_parked_vcpus, vcpu, node); | |
394 | err: | |
395 | return ret; | |
396 | } | |
397 | ||
57038a92 CF |
398 | void kvm_destroy_vcpu(CPUState *cpu) |
399 | { | |
400 | if (do_kvm_destroy_vcpu(cpu) < 0) { | |
401 | error_report("kvm_destroy_vcpu failed"); | |
402 | exit(EXIT_FAILURE); | |
403 | } | |
404 | } | |
405 | ||
4c055ab5 GZ |
406 | static int kvm_get_vcpu(KVMState *s, unsigned long vcpu_id) |
407 | { | |
408 | struct KVMParkedVcpu *cpu; | |
409 | ||
410 | QLIST_FOREACH(cpu, &s->kvm_parked_vcpus, node) { | |
411 | if (cpu->vcpu_id == vcpu_id) { | |
412 | int kvm_fd; | |
413 | ||
414 | QLIST_REMOVE(cpu, node); | |
415 | kvm_fd = cpu->kvm_fd; | |
416 | g_free(cpu); | |
417 | return kvm_fd; | |
418 | } | |
419 | } | |
420 | ||
421 | return kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)vcpu_id); | |
422 | } | |
423 | ||
d0a92b35 | 424 | int kvm_init_vcpu(CPUState *cpu, Error **errp) |
05330448 AL |
425 | { |
426 | KVMState *s = kvm_state; | |
427 | long mmap_size; | |
428 | int ret; | |
429 | ||
d0a92b35 | 430 | trace_kvm_init_vcpu(cpu->cpu_index, kvm_arch_vcpu_id(cpu)); |
05330448 | 431 | |
4c055ab5 | 432 | ret = kvm_get_vcpu(s, kvm_arch_vcpu_id(cpu)); |
05330448 | 433 | if (ret < 0) { |
d0a92b35 DDAG |
434 | error_setg_errno(errp, -ret, "kvm_init_vcpu: kvm_get_vcpu failed (%lu)", |
435 | kvm_arch_vcpu_id(cpu)); | |
05330448 AL |
436 | goto err; |
437 | } | |
438 | ||
8737c51c | 439 | cpu->kvm_fd = ret; |
a60f24b5 | 440 | cpu->kvm_state = s; |
99f31832 | 441 | cpu->vcpu_dirty = true; |
05330448 AL |
442 | |
443 | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); | |
444 | if (mmap_size < 0) { | |
748a680b | 445 | ret = mmap_size; |
d0a92b35 DDAG |
446 | error_setg_errno(errp, -mmap_size, |
447 | "kvm_init_vcpu: KVM_GET_VCPU_MMAP_SIZE failed"); | |
05330448 AL |
448 | goto err; |
449 | } | |
450 | ||
f7575c96 | 451 | cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, |
8737c51c | 452 | cpu->kvm_fd, 0); |
f7575c96 | 453 | if (cpu->kvm_run == MAP_FAILED) { |
05330448 | 454 | ret = -errno; |
d0a92b35 DDAG |
455 | error_setg_errno(errp, ret, |
456 | "kvm_init_vcpu: mmap'ing vcpu state failed (%lu)", | |
457 | kvm_arch_vcpu_id(cpu)); | |
05330448 AL |
458 | goto err; |
459 | } | |
460 | ||
a426e122 JK |
461 | if (s->coalesced_mmio && !s->coalesced_mmio_ring) { |
462 | s->coalesced_mmio_ring = | |
f7575c96 | 463 | (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE; |
a426e122 | 464 | } |
62a2744c | 465 | |
20d695a9 | 466 | ret = kvm_arch_init_vcpu(cpu); |
d0a92b35 DDAG |
467 | if (ret < 0) { |
468 | error_setg_errno(errp, -ret, | |
469 | "kvm_init_vcpu: kvm_arch_init_vcpu failed (%lu)", | |
470 | kvm_arch_vcpu_id(cpu)); | |
471 | } | |
05330448 AL |
472 | err: |
473 | return ret; | |
474 | } | |
475 | ||
5832d1f2 AL |
476 | /* |
477 | * dirty pages logging control | |
478 | */ | |
25254bbc | 479 | |
d6ff5cbc | 480 | static int kvm_mem_flags(MemoryRegion *mr) |
25254bbc | 481 | { |
d6ff5cbc | 482 | bool readonly = mr->readonly || memory_region_is_romd(mr); |
235e8982 | 483 | int flags = 0; |
d6ff5cbc AJ |
484 | |
485 | if (memory_region_get_dirty_log_mask(mr) != 0) { | |
486 | flags |= KVM_MEM_LOG_DIRTY_PAGES; | |
487 | } | |
235e8982 JJ |
488 | if (readonly && kvm_readonly_mem_allowed) { |
489 | flags |= KVM_MEM_READONLY; | |
490 | } | |
491 | return flags; | |
25254bbc MT |
492 | } |
493 | ||
36adac49 | 494 | /* Called with KVMMemoryListener.slots_lock held */ |
7bbda04c PB |
495 | static int kvm_slot_update_flags(KVMMemoryListener *kml, KVMSlot *mem, |
496 | MemoryRegion *mr) | |
5832d1f2 | 497 | { |
d6ff5cbc | 498 | mem->flags = kvm_mem_flags(mr); |
5832d1f2 | 499 | |
4495d6a7 | 500 | /* If nothing changed effectively, no need to issue ioctl */ |
6c090d4a | 501 | if (mem->flags == mem->old_flags) { |
25254bbc | 502 | return 0; |
4495d6a7 JK |
503 | } |
504 | ||
ea776d15 | 505 | kvm_slot_init_dirty_bitmap(mem); |
6c090d4a | 506 | return kvm_set_user_memory_region(kml, mem, false); |
5832d1f2 AL |
507 | } |
508 | ||
7bbda04c PB |
509 | static int kvm_section_update_flags(KVMMemoryListener *kml, |
510 | MemoryRegionSection *section) | |
25254bbc | 511 | { |
023ae9a8 | 512 | hwaddr start_addr, size, slot_size; |
343562e8 | 513 | KVMSlot *mem; |
36adac49 | 514 | int ret = 0; |
25254bbc | 515 | |
343562e8 DH |
516 | size = kvm_align_section(section, &start_addr); |
517 | if (!size) { | |
ea8cb1a8 | 518 | return 0; |
25254bbc | 519 | } |
343562e8 | 520 | |
a2f77862 | 521 | kvm_slots_lock(); |
36adac49 | 522 | |
023ae9a8 IM |
523 | while (size && !ret) { |
524 | slot_size = MIN(kvm_max_slot_size, size); | |
525 | mem = kvm_lookup_matching_slot(kml, start_addr, slot_size); | |
526 | if (!mem) { | |
527 | /* We don't have a slot if we want to trap every access. */ | |
528 | goto out; | |
529 | } | |
343562e8 | 530 | |
023ae9a8 IM |
531 | ret = kvm_slot_update_flags(kml, mem, section->mr); |
532 | start_addr += slot_size; | |
533 | size -= slot_size; | |
534 | } | |
36adac49 PX |
535 | |
536 | out: | |
a2f77862 | 537 | kvm_slots_unlock(); |
36adac49 | 538 | return ret; |
25254bbc MT |
539 | } |
540 | ||
a01672d3 | 541 | static void kvm_log_start(MemoryListener *listener, |
b2dfd71c PB |
542 | MemoryRegionSection *section, |
543 | int old, int new) | |
5832d1f2 | 544 | { |
7bbda04c | 545 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
546 | int r; |
547 | ||
b2dfd71c PB |
548 | if (old != 0) { |
549 | return; | |
550 | } | |
551 | ||
7bbda04c | 552 | r = kvm_section_update_flags(kml, section); |
a01672d3 AK |
553 | if (r < 0) { |
554 | abort(); | |
555 | } | |
5832d1f2 AL |
556 | } |
557 | ||
a01672d3 | 558 | static void kvm_log_stop(MemoryListener *listener, |
b2dfd71c PB |
559 | MemoryRegionSection *section, |
560 | int old, int new) | |
5832d1f2 | 561 | { |
7bbda04c | 562 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 AK |
563 | int r; |
564 | ||
b2dfd71c PB |
565 | if (new != 0) { |
566 | return; | |
567 | } | |
568 | ||
7bbda04c | 569 | r = kvm_section_update_flags(kml, section); |
a01672d3 AK |
570 | if (r < 0) { |
571 | abort(); | |
572 | } | |
5832d1f2 AL |
573 | } |
574 | ||
8369e01c | 575 | /* get kvm's dirty pages bitmap and update qemu's */ |
2c20b27e | 576 | static void kvm_slot_sync_dirty_pages(KVMSlot *slot) |
96c1606b | 577 | { |
2c20b27e PX |
578 | ram_addr_t start = slot->ram_start_offset; |
579 | ram_addr_t pages = slot->memory_size / qemu_real_host_page_size; | |
5ff7fb77 | 580 | |
2c20b27e | 581 | cpu_physical_memory_set_dirty_lebitmap(slot->dirty_bmap, start, pages); |
96c1606b AG |
582 | } |
583 | ||
8369e01c MT |
584 | #define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) |
585 | ||
9b3a31c7 | 586 | /* Allocate the dirty bitmap for a slot */ |
ea776d15 | 587 | static void kvm_slot_init_dirty_bitmap(KVMSlot *mem) |
9b3a31c7 | 588 | { |
ea776d15 PX |
589 | if (!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) || mem->dirty_bmap) { |
590 | return; | |
591 | } | |
592 | ||
9b3a31c7 DDAG |
593 | /* |
594 | * XXX bad kernel interface alert | |
595 | * For dirty bitmap, kernel allocates array of size aligned to | |
596 | * bits-per-long. But for case when the kernel is 64bits and | |
597 | * the userspace is 32bits, userspace can't align to the same | |
598 | * bits-per-long, since sizeof(long) is different between kernel | |
599 | * and user space. This way, userspace will provide buffer which | |
600 | * may be 4 bytes less than the kernel will use, resulting in | |
601 | * userspace memory corruption (which is not detectable by valgrind | |
602 | * too, in most cases). | |
603 | * So for now, let's align to 64 instead of HOST_LONG_BITS here, in | |
604 | * a hope that sizeof(long) won't become >8 any time soon. | |
e0a8f993 KZ |
605 | * |
606 | * Note: the granule of kvm dirty log is qemu_real_host_page_size. | |
607 | * And mem->memory_size is aligned to it (otherwise this mem can't | |
608 | * be registered to KVM). | |
9b3a31c7 | 609 | */ |
e0a8f993 | 610 | hwaddr bitmap_size = ALIGN(mem->memory_size / qemu_real_host_page_size, |
9b3a31c7 DDAG |
611 | /*HOST_LONG_BITS*/ 64) / 8; |
612 | mem->dirty_bmap = g_malloc0(bitmap_size); | |
563d32ba | 613 | mem->dirty_bmap_size = bitmap_size; |
9b3a31c7 DDAG |
614 | } |
615 | ||
e65e5f50 PX |
616 | /* |
617 | * Sync dirty bitmap from kernel to KVMSlot.dirty_bmap, return true if | |
618 | * succeeded, false otherwise | |
619 | */ | |
620 | static bool kvm_slot_get_dirty_log(KVMState *s, KVMSlot *slot) | |
621 | { | |
622 | struct kvm_dirty_log d = {}; | |
623 | int ret; | |
624 | ||
625 | d.dirty_bitmap = slot->dirty_bmap; | |
626 | d.slot = slot->slot | (slot->as_id << 16); | |
627 | ret = kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d); | |
628 | ||
629 | if (ret == -ENOENT) { | |
630 | /* kernel does not have dirty bitmap in this slot */ | |
631 | ret = 0; | |
632 | } | |
633 | if (ret) { | |
634 | error_report_once("%s: KVM_GET_DIRTY_LOG failed with %d", | |
635 | __func__, ret); | |
636 | } | |
637 | return ret == 0; | |
638 | } | |
639 | ||
5832d1f2 | 640 | /** |
4a12a11a | 641 | * kvm_physical_sync_dirty_bitmap - Sync dirty bitmap from kernel space |
5832d1f2 | 642 | * |
4a12a11a PX |
643 | * This function will first try to fetch dirty bitmap from the kernel, |
644 | * and then updates qemu's dirty bitmap. | |
645 | * | |
36adac49 PX |
646 | * NOTE: caller must be with kml->slots_lock held. |
647 | * | |
4a12a11a PX |
648 | * @kml: the KVM memory listener object |
649 | * @section: the memory section to sync the dirty bitmap with | |
5832d1f2 | 650 | */ |
e65e5f50 PX |
651 | static void kvm_physical_sync_dirty_bitmap(KVMMemoryListener *kml, |
652 | MemoryRegionSection *section) | |
5832d1f2 AL |
653 | { |
654 | KVMState *s = kvm_state; | |
151f7749 | 655 | KVMSlot *mem; |
67548f09 | 656 | hwaddr start_addr, size; |
2c20b27e | 657 | hwaddr slot_size; |
67548f09 DH |
658 | |
659 | size = kvm_align_section(section, &start_addr); | |
023ae9a8 | 660 | while (size) { |
023ae9a8 IM |
661 | slot_size = MIN(kvm_max_slot_size, size); |
662 | mem = kvm_lookup_matching_slot(kml, start_addr, slot_size); | |
67548f09 | 663 | if (!mem) { |
e377e87c | 664 | /* We don't have a slot if we want to trap every access. */ |
e65e5f50 | 665 | return; |
151f7749 | 666 | } |
e65e5f50 | 667 | if (kvm_slot_get_dirty_log(s, mem)) { |
2c20b27e | 668 | kvm_slot_sync_dirty_pages(mem); |
151f7749 | 669 | } |
023ae9a8 IM |
670 | start_addr += slot_size; |
671 | size -= slot_size; | |
5832d1f2 | 672 | } |
5832d1f2 AL |
673 | } |
674 | ||
ff4aa114 PX |
675 | /* Alignment requirement for KVM_CLEAR_DIRTY_LOG - 64 pages */ |
676 | #define KVM_CLEAR_LOG_SHIFT 6 | |
677 | #define KVM_CLEAR_LOG_ALIGN (qemu_real_host_page_size << KVM_CLEAR_LOG_SHIFT) | |
678 | #define KVM_CLEAR_LOG_MASK (-KVM_CLEAR_LOG_ALIGN) | |
679 | ||
4222147d PB |
680 | static int kvm_log_clear_one_slot(KVMSlot *mem, int as_id, uint64_t start, |
681 | uint64_t size) | |
ff4aa114 PX |
682 | { |
683 | KVMState *s = kvm_state; | |
4222147d | 684 | uint64_t end, bmap_start, start_delta, bmap_npages; |
ff4aa114 | 685 | struct kvm_clear_dirty_log d; |
ff4aa114 | 686 | unsigned long *bmap_clear = NULL, psize = qemu_real_host_page_size; |
4222147d | 687 | int ret; |
ff4aa114 PX |
688 | |
689 | /* | |
690 | * We need to extend either the start or the size or both to | |
691 | * satisfy the KVM interface requirement. Firstly, do the start | |
692 | * page alignment on 64 host pages | |
693 | */ | |
84516e5b PB |
694 | bmap_start = start & KVM_CLEAR_LOG_MASK; |
695 | start_delta = start - bmap_start; | |
ff4aa114 PX |
696 | bmap_start /= psize; |
697 | ||
698 | /* | |
699 | * The kernel interface has restriction on the size too, that either: | |
700 | * | |
701 | * (1) the size is 64 host pages aligned (just like the start), or | |
702 | * (2) the size fills up until the end of the KVM memslot. | |
703 | */ | |
704 | bmap_npages = DIV_ROUND_UP(size + start_delta, KVM_CLEAR_LOG_ALIGN) | |
705 | << KVM_CLEAR_LOG_SHIFT; | |
706 | end = mem->memory_size / psize; | |
707 | if (bmap_npages > end - bmap_start) { | |
708 | bmap_npages = end - bmap_start; | |
709 | } | |
710 | start_delta /= psize; | |
711 | ||
712 | /* | |
713 | * Prepare the bitmap to clear dirty bits. Here we must guarantee | |
714 | * that we won't clear any unknown dirty bits otherwise we might | |
715 | * accidentally clear some set bits which are not yet synced from | |
716 | * the kernel into QEMU's bitmap, then we'll lose track of the | |
717 | * guest modifications upon those pages (which can directly lead | |
718 | * to guest data loss or panic after migration). | |
719 | * | |
720 | * Layout of the KVMSlot.dirty_bmap: | |
721 | * | |
722 | * |<-------- bmap_npages -----------..>| | |
723 | * [1] | |
724 | * start_delta size | |
725 | * |----------------|-------------|------------------|------------| | |
726 | * ^ ^ ^ ^ | |
727 | * | | | | | |
728 | * start bmap_start (start) end | |
729 | * of memslot of memslot | |
730 | * | |
731 | * [1] bmap_npages can be aligned to either 64 pages or the end of slot | |
732 | */ | |
733 | ||
734 | assert(bmap_start % BITS_PER_LONG == 0); | |
735 | /* We should never do log_clear before log_sync */ | |
736 | assert(mem->dirty_bmap); | |
4054adbd | 737 | if (start_delta || bmap_npages - size / psize) { |
ff4aa114 PX |
738 | /* Slow path - we need to manipulate a temp bitmap */ |
739 | bmap_clear = bitmap_new(bmap_npages); | |
740 | bitmap_copy_with_src_offset(bmap_clear, mem->dirty_bmap, | |
741 | bmap_start, start_delta + size / psize); | |
742 | /* | |
743 | * We need to fill the holes at start because that was not | |
744 | * specified by the caller and we extended the bitmap only for | |
745 | * 64 pages alignment | |
746 | */ | |
747 | bitmap_clear(bmap_clear, 0, start_delta); | |
748 | d.dirty_bitmap = bmap_clear; | |
749 | } else { | |
4054adbd ZY |
750 | /* |
751 | * Fast path - both start and size align well with BITS_PER_LONG | |
752 | * (or the end of memory slot) | |
753 | */ | |
ff4aa114 PX |
754 | d.dirty_bitmap = mem->dirty_bmap + BIT_WORD(bmap_start); |
755 | } | |
756 | ||
757 | d.first_page = bmap_start; | |
758 | /* It should never overflow. If it happens, say something */ | |
759 | assert(bmap_npages <= UINT32_MAX); | |
760 | d.num_pages = bmap_npages; | |
4222147d | 761 | d.slot = mem->slot | (as_id << 16); |
ff4aa114 | 762 | |
38e0b790 TH |
763 | ret = kvm_vm_ioctl(s, KVM_CLEAR_DIRTY_LOG, &d); |
764 | if (ret < 0 && ret != -ENOENT) { | |
ff4aa114 PX |
765 | error_report("%s: KVM_CLEAR_DIRTY_LOG failed, slot=%d, " |
766 | "start=0x%"PRIx64", size=0x%"PRIx32", errno=%d", | |
767 | __func__, d.slot, (uint64_t)d.first_page, | |
768 | (uint32_t)d.num_pages, ret); | |
769 | } else { | |
770 | ret = 0; | |
771 | trace_kvm_clear_dirty_log(d.slot, d.first_page, d.num_pages); | |
772 | } | |
773 | ||
774 | /* | |
775 | * After we have updated the remote dirty bitmap, we update the | |
776 | * cached bitmap as well for the memslot, then if another user | |
777 | * clears the same region we know we shouldn't clear it again on | |
778 | * the remote otherwise it's data loss as well. | |
779 | */ | |
780 | bitmap_clear(mem->dirty_bmap, bmap_start + start_delta, | |
781 | size / psize); | |
782 | /* This handles the NULL case well */ | |
783 | g_free(bmap_clear); | |
4222147d PB |
784 | return ret; |
785 | } | |
786 | ||
787 | ||
788 | /** | |
789 | * kvm_physical_log_clear - Clear the kernel's dirty bitmap for range | |
790 | * | |
791 | * NOTE: this will be a no-op if we haven't enabled manual dirty log | |
792 | * protection in the host kernel because in that case this operation | |
793 | * will be done within log_sync(). | |
794 | * | |
795 | * @kml: the kvm memory listener | |
796 | * @section: the memory range to clear dirty bitmap | |
797 | */ | |
798 | static int kvm_physical_log_clear(KVMMemoryListener *kml, | |
799 | MemoryRegionSection *section) | |
800 | { | |
801 | KVMState *s = kvm_state; | |
84516e5b PB |
802 | uint64_t start, size, offset, count; |
803 | KVMSlot *mem; | |
87287ac0 | 804 | int ret = 0, i; |
4222147d PB |
805 | |
806 | if (!s->manual_dirty_log_protect) { | |
807 | /* No need to do explicit clear */ | |
87287ac0 | 808 | return ret; |
4222147d PB |
809 | } |
810 | ||
811 | start = section->offset_within_address_space; | |
812 | size = int128_get64(section->size); | |
813 | ||
814 | if (!size) { | |
815 | /* Nothing more we can do... */ | |
87287ac0 | 816 | return ret; |
4222147d PB |
817 | } |
818 | ||
a2f77862 | 819 | kvm_slots_lock(); |
4222147d | 820 | |
4222147d PB |
821 | for (i = 0; i < s->nr_slots; i++) { |
822 | mem = &kml->slots[i]; | |
84516e5b PB |
823 | /* Discard slots that are empty or do not overlap the section */ |
824 | if (!mem->memory_size || | |
825 | mem->start_addr > start + size - 1 || | |
826 | start > mem->start_addr + mem->memory_size - 1) { | |
827 | continue; | |
828 | } | |
829 | ||
830 | if (start >= mem->start_addr) { | |
831 | /* The slot starts before section or is aligned to it. */ | |
832 | offset = start - mem->start_addr; | |
833 | count = MIN(mem->memory_size - offset, size); | |
834 | } else { | |
835 | /* The slot starts after section. */ | |
836 | offset = 0; | |
837 | count = MIN(mem->memory_size, size - (mem->start_addr - start)); | |
838 | } | |
839 | ret = kvm_log_clear_one_slot(mem, kml->as_id, offset, count); | |
840 | if (ret < 0) { | |
4222147d PB |
841 | break; |
842 | } | |
843 | } | |
844 | ||
a2f77862 | 845 | kvm_slots_unlock(); |
ff4aa114 PX |
846 | |
847 | return ret; | |
848 | } | |
849 | ||
95d2994a AK |
850 | static void kvm_coalesce_mmio_region(MemoryListener *listener, |
851 | MemoryRegionSection *secion, | |
a8170e5e | 852 | hwaddr start, hwaddr size) |
f65ed4c1 | 853 | { |
f65ed4c1 AL |
854 | KVMState *s = kvm_state; |
855 | ||
856 | if (s->coalesced_mmio) { | |
857 | struct kvm_coalesced_mmio_zone zone; | |
858 | ||
859 | zone.addr = start; | |
860 | zone.size = size; | |
7e680753 | 861 | zone.pad = 0; |
f65ed4c1 | 862 | |
95d2994a | 863 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 864 | } |
f65ed4c1 AL |
865 | } |
866 | ||
95d2994a AK |
867 | static void kvm_uncoalesce_mmio_region(MemoryListener *listener, |
868 | MemoryRegionSection *secion, | |
a8170e5e | 869 | hwaddr start, hwaddr size) |
f65ed4c1 | 870 | { |
f65ed4c1 AL |
871 | KVMState *s = kvm_state; |
872 | ||
873 | if (s->coalesced_mmio) { | |
874 | struct kvm_coalesced_mmio_zone zone; | |
875 | ||
876 | zone.addr = start; | |
877 | zone.size = size; | |
7e680753 | 878 | zone.pad = 0; |
f65ed4c1 | 879 | |
95d2994a | 880 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); |
f65ed4c1 | 881 | } |
f65ed4c1 AL |
882 | } |
883 | ||
e6d34aee PH |
884 | static void kvm_coalesce_pio_add(MemoryListener *listener, |
885 | MemoryRegionSection *section, | |
886 | hwaddr start, hwaddr size) | |
887 | { | |
888 | KVMState *s = kvm_state; | |
889 | ||
890 | if (s->coalesced_pio) { | |
891 | struct kvm_coalesced_mmio_zone zone; | |
892 | ||
893 | zone.addr = start; | |
894 | zone.size = size; | |
895 | zone.pio = 1; | |
896 | ||
897 | (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); | |
898 | } | |
899 | } | |
900 | ||
901 | static void kvm_coalesce_pio_del(MemoryListener *listener, | |
902 | MemoryRegionSection *section, | |
903 | hwaddr start, hwaddr size) | |
904 | { | |
905 | KVMState *s = kvm_state; | |
906 | ||
907 | if (s->coalesced_pio) { | |
908 | struct kvm_coalesced_mmio_zone zone; | |
909 | ||
910 | zone.addr = start; | |
911 | zone.size = size; | |
912 | zone.pio = 1; | |
913 | ||
914 | (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); | |
915 | } | |
916 | } | |
917 | ||
918 | static MemoryListener kvm_coalesced_pio_listener = { | |
919 | .coalesced_io_add = kvm_coalesce_pio_add, | |
920 | .coalesced_io_del = kvm_coalesce_pio_del, | |
921 | }; | |
922 | ||
ad7b8b33 AL |
923 | int kvm_check_extension(KVMState *s, unsigned int extension) |
924 | { | |
925 | int ret; | |
926 | ||
927 | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
928 | if (ret < 0) { | |
929 | ret = 0; | |
930 | } | |
931 | ||
932 | return ret; | |
933 | } | |
934 | ||
7d0a07fa AG |
935 | int kvm_vm_check_extension(KVMState *s, unsigned int extension) |
936 | { | |
937 | int ret; | |
938 | ||
939 | ret = kvm_vm_ioctl(s, KVM_CHECK_EXTENSION, extension); | |
940 | if (ret < 0) { | |
941 | /* VM wide version not implemented, use global one instead */ | |
942 | ret = kvm_check_extension(s, extension); | |
943 | } | |
944 | ||
945 | return ret; | |
946 | } | |
947 | ||
6b552b9b DG |
948 | typedef struct HWPoisonPage { |
949 | ram_addr_t ram_addr; | |
950 | QLIST_ENTRY(HWPoisonPage) list; | |
951 | } HWPoisonPage; | |
952 | ||
953 | static QLIST_HEAD(, HWPoisonPage) hwpoison_page_list = | |
954 | QLIST_HEAD_INITIALIZER(hwpoison_page_list); | |
955 | ||
956 | static void kvm_unpoison_all(void *param) | |
957 | { | |
958 | HWPoisonPage *page, *next_page; | |
959 | ||
960 | QLIST_FOREACH_SAFE(page, &hwpoison_page_list, list, next_page) { | |
961 | QLIST_REMOVE(page, list); | |
962 | qemu_ram_remap(page->ram_addr, TARGET_PAGE_SIZE); | |
963 | g_free(page); | |
964 | } | |
965 | } | |
966 | ||
967 | void kvm_hwpoison_page_add(ram_addr_t ram_addr) | |
968 | { | |
969 | HWPoisonPage *page; | |
970 | ||
971 | QLIST_FOREACH(page, &hwpoison_page_list, list) { | |
972 | if (page->ram_addr == ram_addr) { | |
973 | return; | |
974 | } | |
975 | } | |
976 | page = g_new(HWPoisonPage, 1); | |
977 | page->ram_addr = ram_addr; | |
978 | QLIST_INSERT_HEAD(&hwpoison_page_list, page, list); | |
979 | } | |
980 | ||
b680c5ba GK |
981 | static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size) |
982 | { | |
983 | #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN) | |
984 | /* The kernel expects ioeventfd values in HOST_WORDS_BIGENDIAN | |
985 | * endianness, but the memory core hands them in target endianness. | |
986 | * For example, PPC is always treated as big-endian even if running | |
987 | * on KVM and on PPC64LE. Correct here. | |
988 | */ | |
989 | switch (size) { | |
990 | case 2: | |
991 | val = bswap16(val); | |
992 | break; | |
993 | case 4: | |
994 | val = bswap32(val); | |
995 | break; | |
996 | } | |
997 | #endif | |
998 | return val; | |
999 | } | |
1000 | ||
584f2be7 | 1001 | static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val, |
41cb62c2 | 1002 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
1003 | { |
1004 | int ret; | |
03a96b83 TH |
1005 | struct kvm_ioeventfd iofd = { |
1006 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, | |
1007 | .addr = addr, | |
1008 | .len = size, | |
1009 | .flags = 0, | |
1010 | .fd = fd, | |
1011 | }; | |
500ffd4a | 1012 | |
876d16cd DDAG |
1013 | trace_kvm_set_ioeventfd_mmio(fd, (uint64_t)addr, val, assign, size, |
1014 | datamatch); | |
500ffd4a MT |
1015 | if (!kvm_enabled()) { |
1016 | return -ENOSYS; | |
1017 | } | |
1018 | ||
41cb62c2 MT |
1019 | if (datamatch) { |
1020 | iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
1021 | } | |
500ffd4a MT |
1022 | if (!assign) { |
1023 | iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
1024 | } | |
1025 | ||
1026 | ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); | |
1027 | ||
1028 | if (ret < 0) { | |
1029 | return -errno; | |
1030 | } | |
1031 | ||
1032 | return 0; | |
1033 | } | |
1034 | ||
44c3f8f7 | 1035 | static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val, |
41cb62c2 | 1036 | bool assign, uint32_t size, bool datamatch) |
500ffd4a MT |
1037 | { |
1038 | struct kvm_ioeventfd kick = { | |
b680c5ba | 1039 | .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, |
500ffd4a | 1040 | .addr = addr, |
41cb62c2 | 1041 | .flags = KVM_IOEVENTFD_FLAG_PIO, |
44c3f8f7 | 1042 | .len = size, |
500ffd4a MT |
1043 | .fd = fd, |
1044 | }; | |
1045 | int r; | |
876d16cd | 1046 | trace_kvm_set_ioeventfd_pio(fd, addr, val, assign, size, datamatch); |
500ffd4a MT |
1047 | if (!kvm_enabled()) { |
1048 | return -ENOSYS; | |
1049 | } | |
41cb62c2 MT |
1050 | if (datamatch) { |
1051 | kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; | |
1052 | } | |
500ffd4a MT |
1053 | if (!assign) { |
1054 | kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; | |
1055 | } | |
1056 | r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); | |
1057 | if (r < 0) { | |
1058 | return r; | |
1059 | } | |
1060 | return 0; | |
1061 | } | |
1062 | ||
1063 | ||
d2f2b8a7 SH |
1064 | static int kvm_check_many_ioeventfds(void) |
1065 | { | |
d0dcac83 SH |
1066 | /* Userspace can use ioeventfd for io notification. This requires a host |
1067 | * that supports eventfd(2) and an I/O thread; since eventfd does not | |
1068 | * support SIGIO it cannot interrupt the vcpu. | |
1069 | * | |
1070 | * Older kernels have a 6 device limit on the KVM io bus. Find out so we | |
d2f2b8a7 SH |
1071 | * can avoid creating too many ioeventfds. |
1072 | */ | |
12d4536f | 1073 | #if defined(CONFIG_EVENTFD) |
d2f2b8a7 SH |
1074 | int ioeventfds[7]; |
1075 | int i, ret = 0; | |
1076 | for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { | |
1077 | ioeventfds[i] = eventfd(0, EFD_CLOEXEC); | |
1078 | if (ioeventfds[i] < 0) { | |
1079 | break; | |
1080 | } | |
41cb62c2 | 1081 | ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true); |
d2f2b8a7 SH |
1082 | if (ret < 0) { |
1083 | close(ioeventfds[i]); | |
1084 | break; | |
1085 | } | |
1086 | } | |
1087 | ||
1088 | /* Decide whether many devices are supported or not */ | |
1089 | ret = i == ARRAY_SIZE(ioeventfds); | |
1090 | ||
1091 | while (i-- > 0) { | |
41cb62c2 | 1092 | kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true); |
d2f2b8a7 SH |
1093 | close(ioeventfds[i]); |
1094 | } | |
1095 | return ret; | |
1096 | #else | |
1097 | return 0; | |
1098 | #endif | |
1099 | } | |
1100 | ||
94a8d39a JK |
1101 | static const KVMCapabilityInfo * |
1102 | kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list) | |
1103 | { | |
1104 | while (list->name) { | |
1105 | if (!kvm_check_extension(s, list->value)) { | |
1106 | return list; | |
1107 | } | |
1108 | list++; | |
1109 | } | |
1110 | return NULL; | |
1111 | } | |
1112 | ||
023ae9a8 IM |
1113 | void kvm_set_max_memslot_size(hwaddr max_slot_size) |
1114 | { | |
1115 | g_assert( | |
1116 | ROUND_UP(max_slot_size, qemu_real_host_page_size) == max_slot_size | |
1117 | ); | |
1118 | kvm_max_slot_size = max_slot_size; | |
1119 | } | |
1120 | ||
7bbda04c PB |
1121 | static void kvm_set_phys_mem(KVMMemoryListener *kml, |
1122 | MemoryRegionSection *section, bool add) | |
46dbef6a | 1123 | { |
f357f564 | 1124 | KVMSlot *mem; |
46dbef6a | 1125 | int err; |
a01672d3 | 1126 | MemoryRegion *mr = section->mr; |
235e8982 | 1127 | bool writeable = !mr->readonly && !mr->rom_device; |
2c20b27e PX |
1128 | hwaddr start_addr, size, slot_size, mr_offset; |
1129 | ram_addr_t ram_start_offset; | |
5ea69c2e | 1130 | void *ram; |
46dbef6a | 1131 | |
a01672d3 | 1132 | if (!memory_region_is_ram(mr)) { |
235e8982 JJ |
1133 | if (writeable || !kvm_readonly_mem_allowed) { |
1134 | return; | |
1135 | } else if (!mr->romd_mode) { | |
1136 | /* If the memory device is not in romd_mode, then we actually want | |
1137 | * to remove the kvm memory slot so all accesses will trap. */ | |
1138 | add = false; | |
1139 | } | |
9f213ed9 AK |
1140 | } |
1141 | ||
5ea69c2e DH |
1142 | size = kvm_align_section(section, &start_addr); |
1143 | if (!size) { | |
1144 | return; | |
1145 | } | |
1146 | ||
2c20b27e PX |
1147 | /* The offset of the kvmslot within the memory region */ |
1148 | mr_offset = section->offset_within_region + start_addr - | |
1149 | section->offset_within_address_space; | |
1150 | ||
1151 | /* use aligned delta to align the ram address and offset */ | |
1152 | ram = memory_region_get_ram_ptr(mr) + mr_offset; | |
1153 | ram_start_offset = memory_region_get_ram_addr(mr) + mr_offset; | |
a01672d3 | 1154 | |
a2f77862 | 1155 | kvm_slots_lock(); |
36adac49 | 1156 | |
f357f564 | 1157 | if (!add) { |
023ae9a8 IM |
1158 | do { |
1159 | slot_size = MIN(kvm_max_slot_size, size); | |
1160 | mem = kvm_lookup_matching_slot(kml, start_addr, slot_size); | |
1161 | if (!mem) { | |
1162 | goto out; | |
1163 | } | |
1164 | if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { | |
29b7e8be PX |
1165 | kvm_slot_get_dirty_log(kvm_state, mem); |
1166 | kvm_slot_sync_dirty_pages(mem); | |
023ae9a8 | 1167 | } |
3fbffb62 | 1168 | |
023ae9a8 IM |
1169 | /* unregister the slot */ |
1170 | g_free(mem->dirty_bmap); | |
1171 | mem->dirty_bmap = NULL; | |
1172 | mem->memory_size = 0; | |
1173 | mem->flags = 0; | |
1174 | err = kvm_set_user_memory_region(kml, mem, false); | |
1175 | if (err) { | |
1176 | fprintf(stderr, "%s: error unregistering slot: %s\n", | |
1177 | __func__, strerror(-err)); | |
1178 | abort(); | |
1179 | } | |
1180 | start_addr += slot_size; | |
1181 | size -= slot_size; | |
1182 | } while (size); | |
36adac49 | 1183 | goto out; |
46dbef6a MT |
1184 | } |
1185 | ||
f357f564 | 1186 | /* register the new slot */ |
023ae9a8 IM |
1187 | do { |
1188 | slot_size = MIN(kvm_max_slot_size, size); | |
1189 | mem = kvm_alloc_slot(kml); | |
e65e5f50 | 1190 | mem->as_id = kml->as_id; |
023ae9a8 IM |
1191 | mem->memory_size = slot_size; |
1192 | mem->start_addr = start_addr; | |
2c20b27e | 1193 | mem->ram_start_offset = ram_start_offset; |
023ae9a8 IM |
1194 | mem->ram = ram; |
1195 | mem->flags = kvm_mem_flags(mr); | |
ea776d15 | 1196 | kvm_slot_init_dirty_bitmap(mem); |
023ae9a8 IM |
1197 | err = kvm_set_user_memory_region(kml, mem, true); |
1198 | if (err) { | |
1199 | fprintf(stderr, "%s: error registering slot: %s\n", __func__, | |
1200 | strerror(-err)); | |
1201 | abort(); | |
1202 | } | |
1203 | start_addr += slot_size; | |
2c20b27e | 1204 | ram_start_offset += slot_size; |
023ae9a8 IM |
1205 | ram += slot_size; |
1206 | size -= slot_size; | |
1207 | } while (size); | |
36adac49 PX |
1208 | |
1209 | out: | |
a2f77862 | 1210 | kvm_slots_unlock(); |
46dbef6a MT |
1211 | } |
1212 | ||
a01672d3 AK |
1213 | static void kvm_region_add(MemoryListener *listener, |
1214 | MemoryRegionSection *section) | |
1215 | { | |
7bbda04c PB |
1216 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
1217 | ||
dfde4e6e | 1218 | memory_region_ref(section->mr); |
7bbda04c | 1219 | kvm_set_phys_mem(kml, section, true); |
a01672d3 AK |
1220 | } |
1221 | ||
1222 | static void kvm_region_del(MemoryListener *listener, | |
1223 | MemoryRegionSection *section) | |
1224 | { | |
7bbda04c PB |
1225 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
1226 | ||
1227 | kvm_set_phys_mem(kml, section, false); | |
dfde4e6e | 1228 | memory_region_unref(section->mr); |
a01672d3 AK |
1229 | } |
1230 | ||
1231 | static void kvm_log_sync(MemoryListener *listener, | |
1232 | MemoryRegionSection *section) | |
7b8f3b78 | 1233 | { |
7bbda04c | 1234 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); |
a01672d3 | 1235 | |
a2f77862 | 1236 | kvm_slots_lock(); |
e65e5f50 | 1237 | kvm_physical_sync_dirty_bitmap(kml, section); |
a2f77862 | 1238 | kvm_slots_unlock(); |
7b8f3b78 MT |
1239 | } |
1240 | ||
ff4aa114 PX |
1241 | static void kvm_log_clear(MemoryListener *listener, |
1242 | MemoryRegionSection *section) | |
1243 | { | |
1244 | KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); | |
1245 | int r; | |
1246 | ||
1247 | r = kvm_physical_log_clear(kml, section); | |
1248 | if (r < 0) { | |
1249 | error_report_once("%s: kvm log clear failed: mr=%s " | |
1250 | "offset=%"HWADDR_PRIx" size=%"PRIx64, __func__, | |
1251 | section->mr->name, section->offset_within_region, | |
1252 | int128_get64(section->size)); | |
1253 | abort(); | |
1254 | } | |
1255 | } | |
1256 | ||
d22b096e AK |
1257 | static void kvm_mem_ioeventfd_add(MemoryListener *listener, |
1258 | MemoryRegionSection *section, | |
1259 | bool match_data, uint64_t data, | |
1260 | EventNotifier *e) | |
1261 | { | |
1262 | int fd = event_notifier_get_fd(e); | |
80a1ea37 AK |
1263 | int r; |
1264 | ||
4b8f1c88 | 1265 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
1266 | data, true, int128_get64(section->size), |
1267 | match_data); | |
80a1ea37 | 1268 | if (r < 0) { |
e346bcbf YK |
1269 | fprintf(stderr, "%s: error adding ioeventfd: %s (%d)\n", |
1270 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1271 | abort(); |
1272 | } | |
1273 | } | |
1274 | ||
d22b096e AK |
1275 | static void kvm_mem_ioeventfd_del(MemoryListener *listener, |
1276 | MemoryRegionSection *section, | |
1277 | bool match_data, uint64_t data, | |
1278 | EventNotifier *e) | |
80a1ea37 | 1279 | { |
d22b096e | 1280 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
1281 | int r; |
1282 | ||
4b8f1c88 | 1283 | r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
052e87b0 PB |
1284 | data, false, int128_get64(section->size), |
1285 | match_data); | |
80a1ea37 | 1286 | if (r < 0) { |
e346bcbf YK |
1287 | fprintf(stderr, "%s: error deleting ioeventfd: %s (%d)\n", |
1288 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1289 | abort(); |
1290 | } | |
1291 | } | |
1292 | ||
d22b096e AK |
1293 | static void kvm_io_ioeventfd_add(MemoryListener *listener, |
1294 | MemoryRegionSection *section, | |
1295 | bool match_data, uint64_t data, | |
1296 | EventNotifier *e) | |
80a1ea37 | 1297 | { |
d22b096e | 1298 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
1299 | int r; |
1300 | ||
44c3f8f7 | 1301 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
1302 | data, true, int128_get64(section->size), |
1303 | match_data); | |
80a1ea37 | 1304 | if (r < 0) { |
e346bcbf YK |
1305 | fprintf(stderr, "%s: error adding ioeventfd: %s (%d)\n", |
1306 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1307 | abort(); |
1308 | } | |
1309 | } | |
1310 | ||
d22b096e AK |
1311 | static void kvm_io_ioeventfd_del(MemoryListener *listener, |
1312 | MemoryRegionSection *section, | |
1313 | bool match_data, uint64_t data, | |
1314 | EventNotifier *e) | |
80a1ea37 AK |
1315 | |
1316 | { | |
d22b096e | 1317 | int fd = event_notifier_get_fd(e); |
80a1ea37 AK |
1318 | int r; |
1319 | ||
44c3f8f7 | 1320 | r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
052e87b0 PB |
1321 | data, false, int128_get64(section->size), |
1322 | match_data); | |
80a1ea37 | 1323 | if (r < 0) { |
e346bcbf YK |
1324 | fprintf(stderr, "%s: error deleting ioeventfd: %s (%d)\n", |
1325 | __func__, strerror(-r), -r); | |
80a1ea37 AK |
1326 | abort(); |
1327 | } | |
1328 | } | |
1329 | ||
38bfe691 PB |
1330 | void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml, |
1331 | AddressSpace *as, int as_id) | |
7bbda04c PB |
1332 | { |
1333 | int i; | |
1334 | ||
1335 | kml->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot)); | |
38bfe691 | 1336 | kml->as_id = as_id; |
7bbda04c PB |
1337 | |
1338 | for (i = 0; i < s->nr_slots; i++) { | |
1339 | kml->slots[i].slot = i; | |
1340 | } | |
1341 | ||
1342 | kml->listener.region_add = kvm_region_add; | |
1343 | kml->listener.region_del = kvm_region_del; | |
1344 | kml->listener.log_start = kvm_log_start; | |
1345 | kml->listener.log_stop = kvm_log_stop; | |
1346 | kml->listener.log_sync = kvm_log_sync; | |
ff4aa114 | 1347 | kml->listener.log_clear = kvm_log_clear; |
7bbda04c PB |
1348 | kml->listener.priority = 10; |
1349 | ||
1350 | memory_listener_register(&kml->listener, as); | |
8072aae3 AK |
1351 | |
1352 | for (i = 0; i < s->nr_as; ++i) { | |
1353 | if (!s->as[i].as) { | |
1354 | s->as[i].as = as; | |
1355 | s->as[i].ml = kml; | |
1356 | break; | |
1357 | } | |
1358 | } | |
7bbda04c | 1359 | } |
d22b096e AK |
1360 | |
1361 | static MemoryListener kvm_io_listener = { | |
d22b096e AK |
1362 | .eventfd_add = kvm_io_ioeventfd_add, |
1363 | .eventfd_del = kvm_io_ioeventfd_del, | |
72e22d2f | 1364 | .priority = 10, |
7b8f3b78 MT |
1365 | }; |
1366 | ||
3889c3fa | 1367 | int kvm_set_irq(KVMState *s, int irq, int level) |
84b058d7 JK |
1368 | { |
1369 | struct kvm_irq_level event; | |
1370 | int ret; | |
1371 | ||
7ae26bd4 | 1372 | assert(kvm_async_interrupts_enabled()); |
84b058d7 JK |
1373 | |
1374 | event.level = level; | |
1375 | event.irq = irq; | |
e333cd69 | 1376 | ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event); |
84b058d7 | 1377 | if (ret < 0) { |
3889c3fa | 1378 | perror("kvm_set_irq"); |
84b058d7 JK |
1379 | abort(); |
1380 | } | |
1381 | ||
e333cd69 | 1382 | return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status; |
84b058d7 JK |
1383 | } |
1384 | ||
1385 | #ifdef KVM_CAP_IRQ_ROUTING | |
d3d3bef0 JK |
1386 | typedef struct KVMMSIRoute { |
1387 | struct kvm_irq_routing_entry kroute; | |
1388 | QTAILQ_ENTRY(KVMMSIRoute) entry; | |
1389 | } KVMMSIRoute; | |
1390 | ||
84b058d7 JK |
1391 | static void set_gsi(KVMState *s, unsigned int gsi) |
1392 | { | |
8269fb70 | 1393 | set_bit(gsi, s->used_gsi_bitmap); |
84b058d7 JK |
1394 | } |
1395 | ||
04fa27f5 JK |
1396 | static void clear_gsi(KVMState *s, unsigned int gsi) |
1397 | { | |
8269fb70 | 1398 | clear_bit(gsi, s->used_gsi_bitmap); |
04fa27f5 JK |
1399 | } |
1400 | ||
7b774593 | 1401 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 | 1402 | { |
04fa27f5 | 1403 | int gsi_count, i; |
84b058d7 | 1404 | |
00008418 | 1405 | gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1; |
84b058d7 | 1406 | if (gsi_count > 0) { |
84b058d7 | 1407 | /* Round up so we can search ints using ffs */ |
8269fb70 | 1408 | s->used_gsi_bitmap = bitmap_new(gsi_count); |
4e2e4e63 | 1409 | s->gsi_count = gsi_count; |
84b058d7 JK |
1410 | } |
1411 | ||
1412 | s->irq_routes = g_malloc0(sizeof(*s->irq_routes)); | |
1413 | s->nr_allocated_irq_routes = 0; | |
1414 | ||
50bf31b9 | 1415 | if (!kvm_direct_msi_allowed) { |
4a3adebb JK |
1416 | for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) { |
1417 | QTAILQ_INIT(&s->msi_hashtab[i]); | |
1418 | } | |
04fa27f5 JK |
1419 | } |
1420 | ||
84b058d7 JK |
1421 | kvm_arch_init_irq_routing(s); |
1422 | } | |
1423 | ||
cb925cf9 | 1424 | void kvm_irqchip_commit_routes(KVMState *s) |
e7b20308 JK |
1425 | { |
1426 | int ret; | |
1427 | ||
7005f7f8 PX |
1428 | if (kvm_gsi_direct_mapping()) { |
1429 | return; | |
1430 | } | |
1431 | ||
1432 | if (!kvm_gsi_routing_enabled()) { | |
1433 | return; | |
1434 | } | |
1435 | ||
e7b20308 | 1436 | s->irq_routes->flags = 0; |
54a6c11b | 1437 | trace_kvm_irqchip_commit_routes(); |
e7b20308 JK |
1438 | ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); |
1439 | assert(ret == 0); | |
1440 | } | |
1441 | ||
84b058d7 JK |
1442 | static void kvm_add_routing_entry(KVMState *s, |
1443 | struct kvm_irq_routing_entry *entry) | |
1444 | { | |
1445 | struct kvm_irq_routing_entry *new; | |
1446 | int n, size; | |
1447 | ||
1448 | if (s->irq_routes->nr == s->nr_allocated_irq_routes) { | |
1449 | n = s->nr_allocated_irq_routes * 2; | |
1450 | if (n < 64) { | |
1451 | n = 64; | |
1452 | } | |
1453 | size = sizeof(struct kvm_irq_routing); | |
1454 | size += n * sizeof(*new); | |
1455 | s->irq_routes = g_realloc(s->irq_routes, size); | |
1456 | s->nr_allocated_irq_routes = n; | |
1457 | } | |
1458 | n = s->irq_routes->nr++; | |
1459 | new = &s->irq_routes->entries[n]; | |
0fbc2074 MT |
1460 | |
1461 | *new = *entry; | |
84b058d7 JK |
1462 | |
1463 | set_gsi(s, entry->gsi); | |
1464 | } | |
1465 | ||
cc57407e JK |
1466 | static int kvm_update_routing_entry(KVMState *s, |
1467 | struct kvm_irq_routing_entry *new_entry) | |
1468 | { | |
1469 | struct kvm_irq_routing_entry *entry; | |
1470 | int n; | |
1471 | ||
1472 | for (n = 0; n < s->irq_routes->nr; n++) { | |
1473 | entry = &s->irq_routes->entries[n]; | |
1474 | if (entry->gsi != new_entry->gsi) { | |
1475 | continue; | |
1476 | } | |
1477 | ||
40509f7f MT |
1478 | if(!memcmp(entry, new_entry, sizeof *entry)) { |
1479 | return 0; | |
1480 | } | |
1481 | ||
0fbc2074 | 1482 | *entry = *new_entry; |
cc57407e | 1483 | |
cc57407e JK |
1484 | return 0; |
1485 | } | |
1486 | ||
1487 | return -ESRCH; | |
1488 | } | |
1489 | ||
1df186df | 1490 | void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin) |
84b058d7 | 1491 | { |
0fbc2074 | 1492 | struct kvm_irq_routing_entry e = {}; |
84b058d7 | 1493 | |
4e2e4e63 JK |
1494 | assert(pin < s->gsi_count); |
1495 | ||
84b058d7 JK |
1496 | e.gsi = irq; |
1497 | e.type = KVM_IRQ_ROUTING_IRQCHIP; | |
1498 | e.flags = 0; | |
1499 | e.u.irqchip.irqchip = irqchip; | |
1500 | e.u.irqchip.pin = pin; | |
1501 | kvm_add_routing_entry(s, &e); | |
1502 | } | |
1503 | ||
1e2aa8be | 1504 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
04fa27f5 JK |
1505 | { |
1506 | struct kvm_irq_routing_entry *e; | |
1507 | int i; | |
1508 | ||
76fe21de AK |
1509 | if (kvm_gsi_direct_mapping()) { |
1510 | return; | |
1511 | } | |
1512 | ||
04fa27f5 JK |
1513 | for (i = 0; i < s->irq_routes->nr; i++) { |
1514 | e = &s->irq_routes->entries[i]; | |
1515 | if (e->gsi == virq) { | |
1516 | s->irq_routes->nr--; | |
1517 | *e = s->irq_routes->entries[s->irq_routes->nr]; | |
1518 | } | |
1519 | } | |
1520 | clear_gsi(s, virq); | |
38d87493 | 1521 | kvm_arch_release_virq_post(virq); |
9ba35d0b | 1522 | trace_kvm_irqchip_release_virq(virq); |
04fa27f5 JK |
1523 | } |
1524 | ||
3607715a DG |
1525 | void kvm_irqchip_add_change_notifier(Notifier *n) |
1526 | { | |
1527 | notifier_list_add(&kvm_irqchip_change_notifiers, n); | |
1528 | } | |
1529 | ||
1530 | void kvm_irqchip_remove_change_notifier(Notifier *n) | |
1531 | { | |
1532 | notifier_remove(n); | |
1533 | } | |
1534 | ||
1535 | void kvm_irqchip_change_notify(void) | |
1536 | { | |
1537 | notifier_list_notify(&kvm_irqchip_change_notifiers, NULL); | |
1538 | } | |
1539 | ||
04fa27f5 JK |
1540 | static unsigned int kvm_hash_msi(uint32_t data) |
1541 | { | |
1542 | /* This is optimized for IA32 MSI layout. However, no other arch shall | |
1543 | * repeat the mistake of not providing a direct MSI injection API. */ | |
1544 | return data & 0xff; | |
1545 | } | |
1546 | ||
1547 | static void kvm_flush_dynamic_msi_routes(KVMState *s) | |
1548 | { | |
1549 | KVMMSIRoute *route, *next; | |
1550 | unsigned int hash; | |
1551 | ||
1552 | for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) { | |
1553 | QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) { | |
1554 | kvm_irqchip_release_virq(s, route->kroute.gsi); | |
1555 | QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry); | |
1556 | g_free(route); | |
1557 | } | |
1558 | } | |
1559 | } | |
1560 | ||
1561 | static int kvm_irqchip_get_virq(KVMState *s) | |
1562 | { | |
8269fb70 | 1563 | int next_virq; |
04fa27f5 | 1564 | |
bdf02631 WM |
1565 | /* |
1566 | * PIC and IOAPIC share the first 16 GSI numbers, thus the available | |
1567 | * GSI numbers are more than the number of IRQ route. Allocating a GSI | |
1568 | * number can succeed even though a new route entry cannot be added. | |
1569 | * When this happens, flush dynamic MSI entries to free IRQ route entries. | |
1570 | */ | |
50bf31b9 | 1571 | if (!kvm_direct_msi_allowed && s->irq_routes->nr == s->gsi_count) { |
bdf02631 WM |
1572 | kvm_flush_dynamic_msi_routes(s); |
1573 | } | |
1574 | ||
04fa27f5 | 1575 | /* Return the lowest unused GSI in the bitmap */ |
8269fb70 WY |
1576 | next_virq = find_first_zero_bit(s->used_gsi_bitmap, s->gsi_count); |
1577 | if (next_virq >= s->gsi_count) { | |
1578 | return -ENOSPC; | |
1579 | } else { | |
1580 | return next_virq; | |
04fa27f5 | 1581 | } |
04fa27f5 JK |
1582 | } |
1583 | ||
1584 | static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg) | |
1585 | { | |
1586 | unsigned int hash = kvm_hash_msi(msg.data); | |
1587 | KVMMSIRoute *route; | |
1588 | ||
1589 | QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) { | |
1590 | if (route->kroute.u.msi.address_lo == (uint32_t)msg.address && | |
1591 | route->kroute.u.msi.address_hi == (msg.address >> 32) && | |
d07cc1f1 | 1592 | route->kroute.u.msi.data == le32_to_cpu(msg.data)) { |
04fa27f5 JK |
1593 | return route; |
1594 | } | |
1595 | } | |
1596 | return NULL; | |
1597 | } | |
1598 | ||
1599 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) | |
1600 | { | |
4a3adebb | 1601 | struct kvm_msi msi; |
04fa27f5 JK |
1602 | KVMMSIRoute *route; |
1603 | ||
50bf31b9 | 1604 | if (kvm_direct_msi_allowed) { |
4a3adebb JK |
1605 | msi.address_lo = (uint32_t)msg.address; |
1606 | msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1607 | msi.data = le32_to_cpu(msg.data); |
4a3adebb JK |
1608 | msi.flags = 0; |
1609 | memset(msi.pad, 0, sizeof(msi.pad)); | |
1610 | ||
1611 | return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi); | |
1612 | } | |
1613 | ||
04fa27f5 JK |
1614 | route = kvm_lookup_msi_route(s, msg); |
1615 | if (!route) { | |
e7b20308 | 1616 | int virq; |
04fa27f5 JK |
1617 | |
1618 | virq = kvm_irqchip_get_virq(s); | |
1619 | if (virq < 0) { | |
1620 | return virq; | |
1621 | } | |
1622 | ||
0fbc2074 | 1623 | route = g_malloc0(sizeof(KVMMSIRoute)); |
04fa27f5 JK |
1624 | route->kroute.gsi = virq; |
1625 | route->kroute.type = KVM_IRQ_ROUTING_MSI; | |
1626 | route->kroute.flags = 0; | |
1627 | route->kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1628 | route->kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1629 | route->kroute.u.msi.data = le32_to_cpu(msg.data); |
04fa27f5 JK |
1630 | |
1631 | kvm_add_routing_entry(s, &route->kroute); | |
cb925cf9 | 1632 | kvm_irqchip_commit_routes(s); |
04fa27f5 JK |
1633 | |
1634 | QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route, | |
1635 | entry); | |
04fa27f5 JK |
1636 | } |
1637 | ||
1638 | assert(route->kroute.type == KVM_IRQ_ROUTING_MSI); | |
1639 | ||
3889c3fa | 1640 | return kvm_set_irq(s, route->kroute.gsi, 1); |
04fa27f5 JK |
1641 | } |
1642 | ||
d1f6af6a | 1643 | int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) |
92b4e489 | 1644 | { |
0fbc2074 | 1645 | struct kvm_irq_routing_entry kroute = {}; |
92b4e489 | 1646 | int virq; |
d1f6af6a PX |
1647 | MSIMessage msg = {0, 0}; |
1648 | ||
88c725c7 | 1649 | if (pci_available && dev) { |
e1d4fb2d | 1650 | msg = pci_get_msi_message(dev, vector); |
d1f6af6a | 1651 | } |
92b4e489 | 1652 | |
76fe21de | 1653 | if (kvm_gsi_direct_mapping()) { |
1850b6b7 | 1654 | return kvm_arch_msi_data_to_gsi(msg.data); |
76fe21de AK |
1655 | } |
1656 | ||
f3e1bed8 | 1657 | if (!kvm_gsi_routing_enabled()) { |
92b4e489 JK |
1658 | return -ENOSYS; |
1659 | } | |
1660 | ||
1661 | virq = kvm_irqchip_get_virq(s); | |
1662 | if (virq < 0) { | |
1663 | return virq; | |
1664 | } | |
1665 | ||
1666 | kroute.gsi = virq; | |
1667 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1668 | kroute.flags = 0; | |
1669 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1670 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1671 | kroute.u.msi.data = le32_to_cpu(msg.data); |
88c725c7 | 1672 | if (pci_available && kvm_msi_devid_required()) { |
767a554a PF |
1673 | kroute.flags = KVM_MSI_VALID_DEVID; |
1674 | kroute.u.msi.devid = pci_requester_id(dev); | |
1675 | } | |
dc9f06ca | 1676 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { |
9e03a040 FB |
1677 | kvm_irqchip_release_virq(s, virq); |
1678 | return -EINVAL; | |
1679 | } | |
92b4e489 | 1680 | |
9ba35d0b PX |
1681 | trace_kvm_irqchip_add_msi_route(dev ? dev->name : (char *)"N/A", |
1682 | vector, virq); | |
54a6c11b | 1683 | |
92b4e489 | 1684 | kvm_add_routing_entry(s, &kroute); |
38d87493 | 1685 | kvm_arch_add_msi_route_post(&kroute, vector, dev); |
cb925cf9 | 1686 | kvm_irqchip_commit_routes(s); |
92b4e489 JK |
1687 | |
1688 | return virq; | |
1689 | } | |
1690 | ||
dc9f06ca PF |
1691 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg, |
1692 | PCIDevice *dev) | |
cc57407e | 1693 | { |
0fbc2074 | 1694 | struct kvm_irq_routing_entry kroute = {}; |
cc57407e | 1695 | |
76fe21de AK |
1696 | if (kvm_gsi_direct_mapping()) { |
1697 | return 0; | |
1698 | } | |
1699 | ||
cc57407e JK |
1700 | if (!kvm_irqchip_in_kernel()) { |
1701 | return -ENOSYS; | |
1702 | } | |
1703 | ||
1704 | kroute.gsi = virq; | |
1705 | kroute.type = KVM_IRQ_ROUTING_MSI; | |
1706 | kroute.flags = 0; | |
1707 | kroute.u.msi.address_lo = (uint32_t)msg.address; | |
1708 | kroute.u.msi.address_hi = msg.address >> 32; | |
d07cc1f1 | 1709 | kroute.u.msi.data = le32_to_cpu(msg.data); |
88c725c7 | 1710 | if (pci_available && kvm_msi_devid_required()) { |
767a554a PF |
1711 | kroute.flags = KVM_MSI_VALID_DEVID; |
1712 | kroute.u.msi.devid = pci_requester_id(dev); | |
1713 | } | |
dc9f06ca | 1714 | if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { |
9e03a040 FB |
1715 | return -EINVAL; |
1716 | } | |
cc57407e | 1717 | |
54a6c11b PX |
1718 | trace_kvm_irqchip_update_msi_route(virq); |
1719 | ||
cc57407e JK |
1720 | return kvm_update_routing_entry(s, &kroute); |
1721 | } | |
1722 | ||
ff66ba87 PX |
1723 | static int kvm_irqchip_assign_irqfd(KVMState *s, EventNotifier *event, |
1724 | EventNotifier *resample, int virq, | |
ca916d37 | 1725 | bool assign) |
39853bbc | 1726 | { |
ff66ba87 PX |
1727 | int fd = event_notifier_get_fd(event); |
1728 | int rfd = resample ? event_notifier_get_fd(resample) : -1; | |
1729 | ||
39853bbc JK |
1730 | struct kvm_irqfd irqfd = { |
1731 | .fd = fd, | |
1732 | .gsi = virq, | |
1733 | .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN, | |
1734 | }; | |
1735 | ||
ca916d37 | 1736 | if (rfd != -1) { |
c82d9d43 PX |
1737 | assert(assign); |
1738 | if (kvm_irqchip_is_split()) { | |
1739 | /* | |
1740 | * When the slow irqchip (e.g. IOAPIC) is in the | |
1741 | * userspace, KVM kernel resamplefd will not work because | |
1742 | * the EOI of the interrupt will be delivered to userspace | |
1743 | * instead, so the KVM kernel resamplefd kick will be | |
1744 | * skipped. The userspace here mimics what the kernel | |
1745 | * provides with resamplefd, remember the resamplefd and | |
1746 | * kick it when we receive EOI of this IRQ. | |
1747 | * | |
1748 | * This is hackery because IOAPIC is mostly bypassed | |
1749 | * (except EOI broadcasts) when irqfd is used. However | |
1750 | * this can bring much performance back for split irqchip | |
1751 | * with INTx IRQs (for VFIO, this gives 93% perf of the | |
1752 | * full fast path, which is 46% perf boost comparing to | |
1753 | * the INTx slow path). | |
1754 | */ | |
1755 | kvm_resample_fd_insert(virq, resample); | |
1756 | } else { | |
1757 | irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE; | |
1758 | irqfd.resamplefd = rfd; | |
1759 | } | |
1760 | } else if (!assign) { | |
1761 | if (kvm_irqchip_is_split()) { | |
1762 | kvm_resample_fd_remove(virq); | |
1763 | } | |
ca916d37 VM |
1764 | } |
1765 | ||
cc7e0ddf | 1766 | if (!kvm_irqfds_enabled()) { |
39853bbc JK |
1767 | return -ENOSYS; |
1768 | } | |
1769 | ||
1770 | return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd); | |
1771 | } | |
1772 | ||
d426d9fb CH |
1773 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
1774 | { | |
e9af2fef | 1775 | struct kvm_irq_routing_entry kroute = {}; |
d426d9fb CH |
1776 | int virq; |
1777 | ||
1778 | if (!kvm_gsi_routing_enabled()) { | |
1779 | return -ENOSYS; | |
1780 | } | |
1781 | ||
1782 | virq = kvm_irqchip_get_virq(s); | |
1783 | if (virq < 0) { | |
1784 | return virq; | |
1785 | } | |
1786 | ||
1787 | kroute.gsi = virq; | |
1788 | kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER; | |
1789 | kroute.flags = 0; | |
1790 | kroute.u.adapter.summary_addr = adapter->summary_addr; | |
1791 | kroute.u.adapter.ind_addr = adapter->ind_addr; | |
1792 | kroute.u.adapter.summary_offset = adapter->summary_offset; | |
1793 | kroute.u.adapter.ind_offset = adapter->ind_offset; | |
1794 | kroute.u.adapter.adapter_id = adapter->adapter_id; | |
1795 | ||
1796 | kvm_add_routing_entry(s, &kroute); | |
d426d9fb CH |
1797 | |
1798 | return virq; | |
1799 | } | |
1800 | ||
977a8d9c AS |
1801 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) |
1802 | { | |
1803 | struct kvm_irq_routing_entry kroute = {}; | |
1804 | int virq; | |
1805 | ||
1806 | if (!kvm_gsi_routing_enabled()) { | |
1807 | return -ENOSYS; | |
1808 | } | |
1809 | if (!kvm_check_extension(s, KVM_CAP_HYPERV_SYNIC)) { | |
1810 | return -ENOSYS; | |
1811 | } | |
1812 | virq = kvm_irqchip_get_virq(s); | |
1813 | if (virq < 0) { | |
1814 | return virq; | |
1815 | } | |
1816 | ||
1817 | kroute.gsi = virq; | |
1818 | kroute.type = KVM_IRQ_ROUTING_HV_SINT; | |
1819 | kroute.flags = 0; | |
1820 | kroute.u.hv_sint.vcpu = vcpu; | |
1821 | kroute.u.hv_sint.sint = sint; | |
1822 | ||
1823 | kvm_add_routing_entry(s, &kroute); | |
1824 | kvm_irqchip_commit_routes(s); | |
1825 | ||
1826 | return virq; | |
1827 | } | |
1828 | ||
84b058d7 JK |
1829 | #else /* !KVM_CAP_IRQ_ROUTING */ |
1830 | ||
7b774593 | 1831 | void kvm_init_irq_routing(KVMState *s) |
84b058d7 JK |
1832 | { |
1833 | } | |
04fa27f5 | 1834 | |
d3d3bef0 JK |
1835 | void kvm_irqchip_release_virq(KVMState *s, int virq) |
1836 | { | |
1837 | } | |
1838 | ||
04fa27f5 JK |
1839 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) |
1840 | { | |
1841 | abort(); | |
1842 | } | |
92b4e489 | 1843 | |
d1f6af6a | 1844 | int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) |
92b4e489 | 1845 | { |
df410675 | 1846 | return -ENOSYS; |
92b4e489 | 1847 | } |
39853bbc | 1848 | |
d426d9fb CH |
1849 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) |
1850 | { | |
1851 | return -ENOSYS; | |
1852 | } | |
1853 | ||
977a8d9c AS |
1854 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) |
1855 | { | |
1856 | return -ENOSYS; | |
1857 | } | |
1858 | ||
ff66ba87 PX |
1859 | static int kvm_irqchip_assign_irqfd(KVMState *s, EventNotifier *event, |
1860 | EventNotifier *resample, int virq, | |
1861 | bool assign) | |
39853bbc JK |
1862 | { |
1863 | abort(); | |
1864 | } | |
dabe3143 MT |
1865 | |
1866 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) | |
1867 | { | |
1868 | return -ENOSYS; | |
1869 | } | |
84b058d7 JK |
1870 | #endif /* !KVM_CAP_IRQ_ROUTING */ |
1871 | ||
1c9b71a7 EA |
1872 | int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, |
1873 | EventNotifier *rn, int virq) | |
39853bbc | 1874 | { |
ff66ba87 | 1875 | return kvm_irqchip_assign_irqfd(s, n, rn, virq, true); |
39853bbc JK |
1876 | } |
1877 | ||
1c9b71a7 EA |
1878 | int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, |
1879 | int virq) | |
15b2bd18 | 1880 | { |
ff66ba87 | 1881 | return kvm_irqchip_assign_irqfd(s, n, NULL, virq, false); |
15b2bd18 PB |
1882 | } |
1883 | ||
197e3524 EA |
1884 | int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, |
1885 | EventNotifier *rn, qemu_irq irq) | |
1886 | { | |
1887 | gpointer key, gsi; | |
1888 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
1889 | ||
1890 | if (!found) { | |
1891 | return -ENXIO; | |
1892 | } | |
1893 | return kvm_irqchip_add_irqfd_notifier_gsi(s, n, rn, GPOINTER_TO_INT(gsi)); | |
1894 | } | |
1895 | ||
1896 | int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, | |
1897 | qemu_irq irq) | |
1898 | { | |
1899 | gpointer key, gsi; | |
1900 | gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); | |
1901 | ||
1902 | if (!found) { | |
1903 | return -ENXIO; | |
1904 | } | |
1905 | return kvm_irqchip_remove_irqfd_notifier_gsi(s, n, GPOINTER_TO_INT(gsi)); | |
1906 | } | |
1907 | ||
1908 | void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi) | |
1909 | { | |
1910 | g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi)); | |
1911 | } | |
1912 | ||
4376c40d | 1913 | static void kvm_irqchip_create(KVMState *s) |
84b058d7 | 1914 | { |
84b058d7 JK |
1915 | int ret; |
1916 | ||
d1972be1 | 1917 | assert(s->kernel_irqchip_split != ON_OFF_AUTO_AUTO); |
8db4936b PB |
1918 | if (kvm_check_extension(s, KVM_CAP_IRQCHIP)) { |
1919 | ; | |
1920 | } else if (kvm_check_extension(s, KVM_CAP_S390_IRQCHIP)) { | |
1921 | ret = kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0); | |
1922 | if (ret < 0) { | |
1923 | fprintf(stderr, "Enable kernel irqchip failed: %s\n", strerror(-ret)); | |
1924 | exit(1); | |
1925 | } | |
1926 | } else { | |
1927 | return; | |
84b058d7 JK |
1928 | } |
1929 | ||
d6032e06 CD |
1930 | /* First probe and see if there's a arch-specific hook to create the |
1931 | * in-kernel irqchip for us */ | |
4376c40d | 1932 | ret = kvm_arch_irqchip_create(s); |
8db4936b | 1933 | if (ret == 0) { |
d1972be1 | 1934 | if (s->kernel_irqchip_split == ON_OFF_AUTO_ON) { |
15eafc2e PB |
1935 | perror("Split IRQ chip mode not supported."); |
1936 | exit(1); | |
1937 | } else { | |
1938 | ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); | |
1939 | } | |
8db4936b PB |
1940 | } |
1941 | if (ret < 0) { | |
1942 | fprintf(stderr, "Create kernel irqchip failed: %s\n", strerror(-ret)); | |
1943 | exit(1); | |
84b058d7 JK |
1944 | } |
1945 | ||
3d4b2649 | 1946 | kvm_kernel_irqchip = true; |
7ae26bd4 PM |
1947 | /* If we have an in-kernel IRQ chip then we must have asynchronous |
1948 | * interrupt delivery (though the reverse is not necessarily true) | |
1949 | */ | |
1950 | kvm_async_interrupts_allowed = true; | |
215e79c0 | 1951 | kvm_halt_in_kernel_allowed = true; |
84b058d7 JK |
1952 | |
1953 | kvm_init_irq_routing(s); | |
1954 | ||
197e3524 | 1955 | s->gsimap = g_hash_table_new(g_direct_hash, g_direct_equal); |
84b058d7 JK |
1956 | } |
1957 | ||
670436ce AJ |
1958 | /* Find number of supported CPUs using the recommended |
1959 | * procedure from the kernel API documentation to cope with | |
1960 | * older kernels that may be missing capabilities. | |
1961 | */ | |
1962 | static int kvm_recommended_vcpus(KVMState *s) | |
3ed444e9 | 1963 | { |
11748ba7 | 1964 | int ret = kvm_vm_check_extension(s, KVM_CAP_NR_VCPUS); |
670436ce AJ |
1965 | return (ret) ? ret : 4; |
1966 | } | |
3ed444e9 | 1967 | |
670436ce AJ |
1968 | static int kvm_max_vcpus(KVMState *s) |
1969 | { | |
1970 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS); | |
1971 | return (ret) ? ret : kvm_recommended_vcpus(s); | |
3ed444e9 DH |
1972 | } |
1973 | ||
f31e3266 GK |
1974 | static int kvm_max_vcpu_id(KVMState *s) |
1975 | { | |
1976 | int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPU_ID); | |
1977 | return (ret) ? ret : kvm_max_vcpus(s); | |
1978 | } | |
1979 | ||
41264b38 GK |
1980 | bool kvm_vcpu_id_is_valid(int vcpu_id) |
1981 | { | |
4f7f5893 | 1982 | KVMState *s = KVM_STATE(current_accel()); |
f31e3266 | 1983 | return vcpu_id >= 0 && vcpu_id < kvm_max_vcpu_id(s); |
41264b38 GK |
1984 | } |
1985 | ||
f6a1ef64 | 1986 | static int kvm_init(MachineState *ms) |
05330448 | 1987 | { |
f6a1ef64 | 1988 | MachineClass *mc = MACHINE_GET_CLASS(ms); |
168ccc11 JK |
1989 | static const char upgrade_note[] = |
1990 | "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" | |
1991 | "(see http://sourceforge.net/projects/kvm).\n"; | |
670436ce AJ |
1992 | struct { |
1993 | const char *name; | |
1994 | int num; | |
1995 | } num_cpus[] = { | |
5cc8767d LX |
1996 | { "SMP", ms->smp.cpus }, |
1997 | { "hotpluggable", ms->smp.max_cpus }, | |
670436ce AJ |
1998 | { NULL, } |
1999 | }, *nc = num_cpus; | |
2000 | int soft_vcpus_limit, hard_vcpus_limit; | |
05330448 | 2001 | KVMState *s; |
94a8d39a | 2002 | const KVMCapabilityInfo *missing_cap; |
05330448 | 2003 | int ret; |
7bbda04c | 2004 | int type = 0; |
494cd11d | 2005 | uint64_t dirty_log_manual_caps; |
05330448 | 2006 | |
a2f77862 PX |
2007 | qemu_mutex_init(&kml_slots_lock); |
2008 | ||
fc02086b | 2009 | s = KVM_STATE(ms->accelerator); |
05330448 | 2010 | |
3145fcb6 DG |
2011 | /* |
2012 | * On systems where the kernel can support different base page | |
2013 | * sizes, host page size may be different from TARGET_PAGE_SIZE, | |
2014 | * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum | |
2015 | * page size for the system though. | |
2016 | */ | |
038adc2f | 2017 | assert(TARGET_PAGE_SIZE <= qemu_real_host_page_size); |
3145fcb6 | 2018 | |
aed6efb9 JH |
2019 | s->sigmask_len = 8; |
2020 | ||
e22a25c9 | 2021 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
72cf2d4f | 2022 | QTAILQ_INIT(&s->kvm_sw_breakpoints); |
e22a25c9 | 2023 | #endif |
4c055ab5 | 2024 | QLIST_INIT(&s->kvm_parked_vcpus); |
448058aa | 2025 | s->fd = qemu_open_old("/dev/kvm", O_RDWR); |
05330448 AL |
2026 | if (s->fd == -1) { |
2027 | fprintf(stderr, "Could not access KVM kernel module: %m\n"); | |
2028 | ret = -errno; | |
2029 | goto err; | |
2030 | } | |
2031 | ||
2032 | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); | |
2033 | if (ret < KVM_API_VERSION) { | |
0e1dac6c | 2034 | if (ret >= 0) { |
05330448 | 2035 | ret = -EINVAL; |
a426e122 | 2036 | } |
05330448 AL |
2037 | fprintf(stderr, "kvm version too old\n"); |
2038 | goto err; | |
2039 | } | |
2040 | ||
2041 | if (ret > KVM_API_VERSION) { | |
2042 | ret = -EINVAL; | |
2043 | fprintf(stderr, "kvm version not supported\n"); | |
2044 | goto err; | |
2045 | } | |
2046 | ||
cf0f7cf9 | 2047 | kvm_immediate_exit = kvm_check_extension(s, KVM_CAP_IMMEDIATE_EXIT); |
fb541ca5 AW |
2048 | s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS); |
2049 | ||
2050 | /* If unspecified, use the default value */ | |
2051 | if (!s->nr_slots) { | |
2052 | s->nr_slots = 32; | |
2053 | } | |
2054 | ||
8072aae3 AK |
2055 | s->nr_as = kvm_check_extension(s, KVM_CAP_MULTI_ADDRESS_SPACE); |
2056 | if (s->nr_as <= 1) { | |
2057 | s->nr_as = 1; | |
2058 | } | |
2059 | s->as = g_new0(struct KVMAs, s->nr_as); | |
2060 | ||
f2ce39b4 PB |
2061 | if (object_property_find(OBJECT(current_machine), "kvm-type")) { |
2062 | g_autofree char *kvm_type = object_property_get_str(OBJECT(current_machine), | |
2063 | "kvm-type", | |
2064 | &error_abort); | |
dc0ca80e | 2065 | type = mc->kvm_type(ms, kvm_type); |
516fc0a0 AJ |
2066 | } else if (mc->kvm_type) { |
2067 | type = mc->kvm_type(ms, NULL); | |
135a129a AK |
2068 | } |
2069 | ||
94ccff13 | 2070 | do { |
135a129a | 2071 | ret = kvm_ioctl(s, KVM_CREATE_VM, type); |
94ccff13 TK |
2072 | } while (ret == -EINTR); |
2073 | ||
2074 | if (ret < 0) { | |
521f438e | 2075 | fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret, |
94ccff13 TK |
2076 | strerror(-ret)); |
2077 | ||
0104dcac | 2078 | #ifdef TARGET_S390X |
2c80e996 CH |
2079 | if (ret == -EINVAL) { |
2080 | fprintf(stderr, | |
2081 | "Host kernel setup problem detected. Please verify:\n"); | |
2082 | fprintf(stderr, "- for kernels supporting the switch_amode or" | |
2083 | " user_mode parameters, whether\n"); | |
2084 | fprintf(stderr, | |
2085 | " user space is running in primary address space\n"); | |
2086 | fprintf(stderr, | |
2087 | "- for kernels supporting the vm.allocate_pgste sysctl, " | |
2088 | "whether it is enabled\n"); | |
2089 | } | |
0104dcac | 2090 | #endif |
05330448 | 2091 | goto err; |
0104dcac | 2092 | } |
05330448 | 2093 | |
94ccff13 | 2094 | s->vmfd = ret; |
11748ba7 GK |
2095 | |
2096 | /* check the vcpu limits */ | |
2097 | soft_vcpus_limit = kvm_recommended_vcpus(s); | |
2098 | hard_vcpus_limit = kvm_max_vcpus(s); | |
2099 | ||
2100 | while (nc->name) { | |
2101 | if (nc->num > soft_vcpus_limit) { | |
2102 | warn_report("Number of %s cpus requested (%d) exceeds " | |
2103 | "the recommended cpus supported by KVM (%d)", | |
2104 | nc->name, nc->num, soft_vcpus_limit); | |
2105 | ||
2106 | if (nc->num > hard_vcpus_limit) { | |
2107 | fprintf(stderr, "Number of %s cpus requested (%d) exceeds " | |
2108 | "the maximum cpus supported by KVM (%d)\n", | |
2109 | nc->name, nc->num, hard_vcpus_limit); | |
2110 | exit(1); | |
2111 | } | |
2112 | } | |
2113 | nc++; | |
2114 | } | |
2115 | ||
94a8d39a JK |
2116 | missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); |
2117 | if (!missing_cap) { | |
2118 | missing_cap = | |
2119 | kvm_check_extension_list(s, kvm_arch_required_capabilities); | |
05330448 | 2120 | } |
94a8d39a | 2121 | if (missing_cap) { |
ad7b8b33 | 2122 | ret = -EINVAL; |
94a8d39a JK |
2123 | fprintf(stderr, "kvm does not support %s\n%s", |
2124 | missing_cap->name, upgrade_note); | |
d85dc283 AL |
2125 | goto err; |
2126 | } | |
2127 | ||
ad7b8b33 | 2128 | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
e6d34aee PH |
2129 | s->coalesced_pio = s->coalesced_mmio && |
2130 | kvm_check_extension(s, KVM_CAP_COALESCED_PIO); | |
f65ed4c1 | 2131 | |
494cd11d | 2132 | dirty_log_manual_caps = |
ff4aa114 | 2133 | kvm_check_extension(s, KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2); |
494cd11d JZ |
2134 | dirty_log_manual_caps &= (KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE | |
2135 | KVM_DIRTY_LOG_INITIALLY_SET); | |
2136 | s->manual_dirty_log_protect = dirty_log_manual_caps; | |
2137 | if (dirty_log_manual_caps) { | |
2138 | ret = kvm_vm_enable_cap(s, KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2, 0, | |
2139 | dirty_log_manual_caps); | |
ff4aa114 | 2140 | if (ret) { |
494cd11d JZ |
2141 | warn_report("Trying to enable capability %"PRIu64" of " |
2142 | "KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 but failed. " | |
2143 | "Falling back to the legacy mode. ", | |
2144 | dirty_log_manual_caps); | |
2145 | s->manual_dirty_log_protect = 0; | |
ff4aa114 PX |
2146 | } |
2147 | } | |
2148 | ||
a0fb002c JK |
2149 | #ifdef KVM_CAP_VCPU_EVENTS |
2150 | s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); | |
2151 | #endif | |
2152 | ||
b0b1d690 JK |
2153 | s->robust_singlestep = |
2154 | kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); | |
b0b1d690 | 2155 | |
ff44f1a3 JK |
2156 | #ifdef KVM_CAP_DEBUGREGS |
2157 | s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); | |
2158 | #endif | |
2159 | ||
ebbfef2f LA |
2160 | s->max_nested_state_len = kvm_check_extension(s, KVM_CAP_NESTED_STATE); |
2161 | ||
d3d3bef0 | 2162 | #ifdef KVM_CAP_IRQ_ROUTING |
50bf31b9 | 2163 | kvm_direct_msi_allowed = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0); |
d3d3bef0 | 2164 | #endif |
4a3adebb | 2165 | |
3ab73842 JK |
2166 | s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3); |
2167 | ||
e333cd69 | 2168 | s->irq_set_ioctl = KVM_IRQ_LINE; |
8732fbd2 | 2169 | if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) { |
e333cd69 | 2170 | s->irq_set_ioctl = KVM_IRQ_LINE_STATUS; |
8732fbd2 PM |
2171 | } |
2172 | ||
df9c8b75 JJ |
2173 | kvm_readonly_mem_allowed = |
2174 | (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0); | |
df9c8b75 | 2175 | |
69e03ae6 NN |
2176 | kvm_eventfds_allowed = |
2177 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0); | |
2178 | ||
f41389ae EA |
2179 | kvm_irqfds_allowed = |
2180 | (kvm_check_extension(s, KVM_CAP_IRQFD) > 0); | |
2181 | ||
2182 | kvm_resamplefds_allowed = | |
2183 | (kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0); | |
2184 | ||
d0a073a1 DD |
2185 | kvm_vm_attributes_allowed = |
2186 | (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0); | |
2187 | ||
35108223 JW |
2188 | kvm_ioeventfd_any_length_allowed = |
2189 | (kvm_check_extension(s, KVM_CAP_IOEVENTFD_ANY_LENGTH) > 0); | |
2190 | ||
d870cfde GA |
2191 | kvm_state = s; |
2192 | ||
b16565b3 | 2193 | ret = kvm_arch_init(ms, s); |
a426e122 | 2194 | if (ret < 0) { |
05330448 | 2195 | goto err; |
a426e122 | 2196 | } |
05330448 | 2197 | |
d1972be1 XL |
2198 | if (s->kernel_irqchip_split == ON_OFF_AUTO_AUTO) { |
2199 | s->kernel_irqchip_split = mc->default_kernel_irqchip_split ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF; | |
2200 | } | |
2201 | ||
6b552b9b DG |
2202 | qemu_register_reset(kvm_unpoison_all, NULL); |
2203 | ||
11bc4a13 | 2204 | if (s->kernel_irqchip_allowed) { |
4376c40d | 2205 | kvm_irqchip_create(s); |
84b058d7 JK |
2206 | } |
2207 | ||
8c56c1a5 PF |
2208 | if (kvm_eventfds_allowed) { |
2209 | s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add; | |
2210 | s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del; | |
2211 | } | |
e6d34aee PH |
2212 | s->memory_listener.listener.coalesced_io_add = kvm_coalesce_mmio_region; |
2213 | s->memory_listener.listener.coalesced_io_del = kvm_uncoalesce_mmio_region; | |
7bbda04c PB |
2214 | |
2215 | kvm_memory_listener_register(s, &s->memory_listener, | |
38bfe691 | 2216 | &address_space_memory, 0); |
f9b49088 EA |
2217 | if (kvm_eventfds_allowed) { |
2218 | memory_listener_register(&kvm_io_listener, | |
2219 | &address_space_io); | |
2220 | } | |
e6d34aee PH |
2221 | memory_listener_register(&kvm_coalesced_pio_listener, |
2222 | &address_space_io); | |
05330448 | 2223 | |
d2f2b8a7 SH |
2224 | s->many_ioeventfds = kvm_check_many_ioeventfds(); |
2225 | ||
62dd4eda | 2226 | s->sync_mmu = !!kvm_vm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); |
f5948942 | 2227 | if (!s->sync_mmu) { |
956b109f DH |
2228 | ret = ram_block_discard_disable(true); |
2229 | assert(!ret); | |
f5948942 | 2230 | } |
05330448 AL |
2231 | return 0; |
2232 | ||
2233 | err: | |
0e1dac6c | 2234 | assert(ret < 0); |
6d1cc321 SW |
2235 | if (s->vmfd >= 0) { |
2236 | close(s->vmfd); | |
2237 | } | |
2238 | if (s->fd != -1) { | |
2239 | close(s->fd); | |
05330448 | 2240 | } |
7bbda04c | 2241 | g_free(s->memory_listener.slots); |
05330448 AL |
2242 | |
2243 | return ret; | |
2244 | } | |
2245 | ||
aed6efb9 JH |
2246 | void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len) |
2247 | { | |
2248 | s->sigmask_len = sigmask_len; | |
2249 | } | |
2250 | ||
4c663752 PB |
2251 | static void kvm_handle_io(uint16_t port, MemTxAttrs attrs, void *data, int direction, |
2252 | int size, uint32_t count) | |
05330448 AL |
2253 | { |
2254 | int i; | |
2255 | uint8_t *ptr = data; | |
2256 | ||
2257 | for (i = 0; i < count; i++) { | |
4c663752 | 2258 | address_space_rw(&address_space_io, port, attrs, |
5c9eb028 | 2259 | ptr, size, |
354678c5 | 2260 | direction == KVM_EXIT_IO_OUT); |
05330448 AL |
2261 | ptr += size; |
2262 | } | |
05330448 AL |
2263 | } |
2264 | ||
5326ab55 | 2265 | static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run) |
7c80eef8 | 2266 | { |
977c7b6d RK |
2267 | fprintf(stderr, "KVM internal error. Suberror: %d\n", |
2268 | run->internal.suberror); | |
2269 | ||
7c80eef8 MT |
2270 | if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) { |
2271 | int i; | |
2272 | ||
7c80eef8 | 2273 | for (i = 0; i < run->internal.ndata; ++i) { |
56567da3 | 2274 | fprintf(stderr, "extra data[%d]: 0x%016"PRIx64"\n", |
7c80eef8 MT |
2275 | i, (uint64_t)run->internal.data[i]); |
2276 | } | |
2277 | } | |
7c80eef8 MT |
2278 | if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) { |
2279 | fprintf(stderr, "emulation failure\n"); | |
20d695a9 | 2280 | if (!kvm_arch_stop_on_emulation_error(cpu)) { |
90c84c56 | 2281 | cpu_dump_state(cpu, stderr, CPU_DUMP_CODE); |
d73cd8f4 | 2282 | return EXCP_INTERRUPT; |
a426e122 | 2283 | } |
7c80eef8 MT |
2284 | } |
2285 | /* FIXME: Should trigger a qmp message to let management know | |
2286 | * something went wrong. | |
2287 | */ | |
73aaec4a | 2288 | return -1; |
7c80eef8 | 2289 | } |
7c80eef8 | 2290 | |
62a2744c | 2291 | void kvm_flush_coalesced_mmio_buffer(void) |
f65ed4c1 | 2292 | { |
f65ed4c1 | 2293 | KVMState *s = kvm_state; |
1cae88b9 AK |
2294 | |
2295 | if (s->coalesced_flush_in_progress) { | |
2296 | return; | |
2297 | } | |
2298 | ||
2299 | s->coalesced_flush_in_progress = true; | |
2300 | ||
62a2744c SY |
2301 | if (s->coalesced_mmio_ring) { |
2302 | struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring; | |
f65ed4c1 AL |
2303 | while (ring->first != ring->last) { |
2304 | struct kvm_coalesced_mmio *ent; | |
2305 | ||
2306 | ent = &ring->coalesced_mmio[ring->first]; | |
2307 | ||
e6d34aee | 2308 | if (ent->pio == 1) { |
19f70347 PM |
2309 | address_space_write(&address_space_io, ent->phys_addr, |
2310 | MEMTXATTRS_UNSPECIFIED, ent->data, | |
2311 | ent->len); | |
e6d34aee PH |
2312 | } else { |
2313 | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); | |
2314 | } | |
85199474 | 2315 | smp_wmb(); |
f65ed4c1 AL |
2316 | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; |
2317 | } | |
2318 | } | |
1cae88b9 AK |
2319 | |
2320 | s->coalesced_flush_in_progress = false; | |
f65ed4c1 AL |
2321 | } |
2322 | ||
92a5199b TL |
2323 | bool kvm_cpu_check_are_resettable(void) |
2324 | { | |
2325 | return kvm_arch_cpu_check_are_resettable(); | |
2326 | } | |
2327 | ||
14e6fe12 | 2328 | static void do_kvm_cpu_synchronize_state(CPUState *cpu, run_on_cpu_data arg) |
4c0960c0 | 2329 | { |
99f31832 | 2330 | if (!cpu->vcpu_dirty) { |
20d695a9 | 2331 | kvm_arch_get_registers(cpu); |
99f31832 | 2332 | cpu->vcpu_dirty = true; |
4c0960c0 AK |
2333 | } |
2334 | } | |
2335 | ||
dd1750d7 | 2336 | void kvm_cpu_synchronize_state(CPUState *cpu) |
2705d56a | 2337 | { |
99f31832 | 2338 | if (!cpu->vcpu_dirty) { |
14e6fe12 | 2339 | run_on_cpu(cpu, do_kvm_cpu_synchronize_state, RUN_ON_CPU_NULL); |
a426e122 | 2340 | } |
2705d56a JK |
2341 | } |
2342 | ||
14e6fe12 | 2343 | static void do_kvm_cpu_synchronize_post_reset(CPUState *cpu, run_on_cpu_data arg) |
ea375f9a | 2344 | { |
20d695a9 | 2345 | kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE); |
99f31832 | 2346 | cpu->vcpu_dirty = false; |
ea375f9a JK |
2347 | } |
2348 | ||
c8e2085d DH |
2349 | void kvm_cpu_synchronize_post_reset(CPUState *cpu) |
2350 | { | |
14e6fe12 | 2351 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_reset, RUN_ON_CPU_NULL); |
c8e2085d DH |
2352 | } |
2353 | ||
14e6fe12 | 2354 | static void do_kvm_cpu_synchronize_post_init(CPUState *cpu, run_on_cpu_data arg) |
ea375f9a | 2355 | { |
20d695a9 | 2356 | kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE); |
99f31832 | 2357 | cpu->vcpu_dirty = false; |
ea375f9a JK |
2358 | } |
2359 | ||
c8e2085d DH |
2360 | void kvm_cpu_synchronize_post_init(CPUState *cpu) |
2361 | { | |
14e6fe12 | 2362 | run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, RUN_ON_CPU_NULL); |
c8e2085d DH |
2363 | } |
2364 | ||
75e972da DG |
2365 | static void do_kvm_cpu_synchronize_pre_loadvm(CPUState *cpu, run_on_cpu_data arg) |
2366 | { | |
99f31832 | 2367 | cpu->vcpu_dirty = true; |
75e972da DG |
2368 | } |
2369 | ||
2370 | void kvm_cpu_synchronize_pre_loadvm(CPUState *cpu) | |
2371 | { | |
2372 | run_on_cpu(cpu, do_kvm_cpu_synchronize_pre_loadvm, RUN_ON_CPU_NULL); | |
2373 | } | |
2374 | ||
2ae41db2 PB |
2375 | #ifdef KVM_HAVE_MCE_INJECTION |
2376 | static __thread void *pending_sigbus_addr; | |
2377 | static __thread int pending_sigbus_code; | |
2378 | static __thread bool have_sigbus_pending; | |
2379 | #endif | |
2380 | ||
cf0f7cf9 PB |
2381 | static void kvm_cpu_kick(CPUState *cpu) |
2382 | { | |
d73415a3 | 2383 | qatomic_set(&cpu->kvm_run->immediate_exit, 1); |
cf0f7cf9 PB |
2384 | } |
2385 | ||
2386 | static void kvm_cpu_kick_self(void) | |
2387 | { | |
2388 | if (kvm_immediate_exit) { | |
2389 | kvm_cpu_kick(current_cpu); | |
2390 | } else { | |
2391 | qemu_cpu_kick_self(); | |
2392 | } | |
2393 | } | |
2394 | ||
18268b60 PB |
2395 | static void kvm_eat_signals(CPUState *cpu) |
2396 | { | |
2397 | struct timespec ts = { 0, 0 }; | |
2398 | siginfo_t siginfo; | |
2399 | sigset_t waitset; | |
2400 | sigset_t chkset; | |
2401 | int r; | |
2402 | ||
cf0f7cf9 | 2403 | if (kvm_immediate_exit) { |
d73415a3 | 2404 | qatomic_set(&cpu->kvm_run->immediate_exit, 0); |
cf0f7cf9 PB |
2405 | /* Write kvm_run->immediate_exit before the cpu->exit_request |
2406 | * write in kvm_cpu_exec. | |
2407 | */ | |
2408 | smp_wmb(); | |
2409 | return; | |
2410 | } | |
2411 | ||
18268b60 PB |
2412 | sigemptyset(&waitset); |
2413 | sigaddset(&waitset, SIG_IPI); | |
2414 | ||
2415 | do { | |
2416 | r = sigtimedwait(&waitset, &siginfo, &ts); | |
2417 | if (r == -1 && !(errno == EAGAIN || errno == EINTR)) { | |
2418 | perror("sigtimedwait"); | |
2419 | exit(1); | |
2420 | } | |
2421 | ||
2422 | r = sigpending(&chkset); | |
2423 | if (r == -1) { | |
2424 | perror("sigpending"); | |
2425 | exit(1); | |
2426 | } | |
2427 | } while (sigismember(&chkset, SIG_IPI)); | |
2428 | } | |
2429 | ||
1458c363 | 2430 | int kvm_cpu_exec(CPUState *cpu) |
05330448 | 2431 | { |
f7575c96 | 2432 | struct kvm_run *run = cpu->kvm_run; |
7cbb533f | 2433 | int ret, run_ret; |
05330448 | 2434 | |
8c0d577e | 2435 | DPRINTF("kvm_cpu_exec()\n"); |
05330448 | 2436 | |
20d695a9 | 2437 | if (kvm_arch_process_async_events(cpu)) { |
d73415a3 | 2438 | qatomic_set(&cpu->exit_request, 0); |
6792a57b | 2439 | return EXCP_HLT; |
9ccfac9e | 2440 | } |
0af691d7 | 2441 | |
4b8523ee | 2442 | qemu_mutex_unlock_iothread(); |
1d78a3c3 | 2443 | cpu_exec_start(cpu); |
4b8523ee | 2444 | |
9ccfac9e | 2445 | do { |
4c663752 PB |
2446 | MemTxAttrs attrs; |
2447 | ||
99f31832 | 2448 | if (cpu->vcpu_dirty) { |
20d695a9 | 2449 | kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE); |
99f31832 | 2450 | cpu->vcpu_dirty = false; |
4c0960c0 AK |
2451 | } |
2452 | ||
20d695a9 | 2453 | kvm_arch_pre_run(cpu, run); |
d73415a3 | 2454 | if (qatomic_read(&cpu->exit_request)) { |
9ccfac9e JK |
2455 | DPRINTF("interrupt exit requested\n"); |
2456 | /* | |
2457 | * KVM requires us to reenter the kernel after IO exits to complete | |
2458 | * instruction emulation. This self-signal will ensure that we | |
2459 | * leave ASAP again. | |
2460 | */ | |
cf0f7cf9 | 2461 | kvm_cpu_kick_self(); |
9ccfac9e | 2462 | } |
9ccfac9e | 2463 | |
cf0f7cf9 PB |
2464 | /* Read cpu->exit_request before KVM_RUN reads run->immediate_exit. |
2465 | * Matching barrier in kvm_eat_signals. | |
2466 | */ | |
2467 | smp_rmb(); | |
2468 | ||
1bc22652 | 2469 | run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0); |
9ccfac9e | 2470 | |
4c663752 | 2471 | attrs = kvm_arch_post_run(cpu, run); |
05330448 | 2472 | |
2ae41db2 PB |
2473 | #ifdef KVM_HAVE_MCE_INJECTION |
2474 | if (unlikely(have_sigbus_pending)) { | |
2475 | qemu_mutex_lock_iothread(); | |
2476 | kvm_arch_on_sigbus_vcpu(cpu, pending_sigbus_code, | |
2477 | pending_sigbus_addr); | |
2478 | have_sigbus_pending = false; | |
2479 | qemu_mutex_unlock_iothread(); | |
2480 | } | |
2481 | #endif | |
2482 | ||
7cbb533f | 2483 | if (run_ret < 0) { |
dc77d341 JK |
2484 | if (run_ret == -EINTR || run_ret == -EAGAIN) { |
2485 | DPRINTF("io window exit\n"); | |
18268b60 | 2486 | kvm_eat_signals(cpu); |
d73cd8f4 | 2487 | ret = EXCP_INTERRUPT; |
dc77d341 JK |
2488 | break; |
2489 | } | |
7b011fbc ME |
2490 | fprintf(stderr, "error: kvm run failed %s\n", |
2491 | strerror(-run_ret)); | |
dae02ba5 LV |
2492 | #ifdef TARGET_PPC |
2493 | if (run_ret == -EBUSY) { | |
2494 | fprintf(stderr, | |
2495 | "This is probably because your SMT is enabled.\n" | |
2496 | "VCPU can only run on primary threads with all " | |
2497 | "secondary threads offline.\n"); | |
2498 | } | |
2499 | #endif | |
a85e130e PB |
2500 | ret = -1; |
2501 | break; | |
05330448 AL |
2502 | } |
2503 | ||
b76ac80a | 2504 | trace_kvm_run_exit(cpu->cpu_index, run->exit_reason); |
05330448 AL |
2505 | switch (run->exit_reason) { |
2506 | case KVM_EXIT_IO: | |
8c0d577e | 2507 | DPRINTF("handle_io\n"); |
80b7d2ef | 2508 | /* Called outside BQL */ |
4c663752 | 2509 | kvm_handle_io(run->io.port, attrs, |
b30e93e9 JK |
2510 | (uint8_t *)run + run->io.data_offset, |
2511 | run->io.direction, | |
2512 | run->io.size, | |
2513 | run->io.count); | |
d73cd8f4 | 2514 | ret = 0; |
05330448 AL |
2515 | break; |
2516 | case KVM_EXIT_MMIO: | |
8c0d577e | 2517 | DPRINTF("handle_mmio\n"); |
de7ea885 | 2518 | /* Called outside BQL */ |
4c663752 PB |
2519 | address_space_rw(&address_space_memory, |
2520 | run->mmio.phys_addr, attrs, | |
2521 | run->mmio.data, | |
2522 | run->mmio.len, | |
2523 | run->mmio.is_write); | |
d73cd8f4 | 2524 | ret = 0; |
05330448 AL |
2525 | break; |
2526 | case KVM_EXIT_IRQ_WINDOW_OPEN: | |
8c0d577e | 2527 | DPRINTF("irq_window_open\n"); |
d73cd8f4 | 2528 | ret = EXCP_INTERRUPT; |
05330448 AL |
2529 | break; |
2530 | case KVM_EXIT_SHUTDOWN: | |
8c0d577e | 2531 | DPRINTF("shutdown\n"); |
cf83f140 | 2532 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
d73cd8f4 | 2533 | ret = EXCP_INTERRUPT; |
05330448 AL |
2534 | break; |
2535 | case KVM_EXIT_UNKNOWN: | |
bb44e0d1 JK |
2536 | fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", |
2537 | (uint64_t)run->hw.hardware_exit_reason); | |
73aaec4a | 2538 | ret = -1; |
05330448 | 2539 | break; |
7c80eef8 | 2540 | case KVM_EXIT_INTERNAL_ERROR: |
5326ab55 | 2541 | ret = kvm_handle_internal_error(cpu, run); |
7c80eef8 | 2542 | break; |
99040447 PS |
2543 | case KVM_EXIT_SYSTEM_EVENT: |
2544 | switch (run->system_event.type) { | |
2545 | case KVM_SYSTEM_EVENT_SHUTDOWN: | |
cf83f140 | 2546 | qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); |
99040447 PS |
2547 | ret = EXCP_INTERRUPT; |
2548 | break; | |
2549 | case KVM_SYSTEM_EVENT_RESET: | |
cf83f140 | 2550 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
99040447 PS |
2551 | ret = EXCP_INTERRUPT; |
2552 | break; | |
7c207b90 | 2553 | case KVM_SYSTEM_EVENT_CRASH: |
d187e08d | 2554 | kvm_cpu_synchronize_state(cpu); |
7c207b90 | 2555 | qemu_mutex_lock_iothread(); |
c86f106b | 2556 | qemu_system_guest_panicked(cpu_get_crash_info(cpu)); |
7c207b90 AS |
2557 | qemu_mutex_unlock_iothread(); |
2558 | ret = 0; | |
2559 | break; | |
99040447 PS |
2560 | default: |
2561 | DPRINTF("kvm_arch_handle_exit\n"); | |
2562 | ret = kvm_arch_handle_exit(cpu, run); | |
2563 | break; | |
2564 | } | |
2565 | break; | |
05330448 | 2566 | default: |
8c0d577e | 2567 | DPRINTF("kvm_arch_handle_exit\n"); |
20d695a9 | 2568 | ret = kvm_arch_handle_exit(cpu, run); |
05330448 AL |
2569 | break; |
2570 | } | |
d73cd8f4 | 2571 | } while (ret == 0); |
05330448 | 2572 | |
1d78a3c3 | 2573 | cpu_exec_end(cpu); |
4b8523ee JK |
2574 | qemu_mutex_lock_iothread(); |
2575 | ||
73aaec4a | 2576 | if (ret < 0) { |
90c84c56 | 2577 | cpu_dump_state(cpu, stderr, CPU_DUMP_CODE); |
0461d5a6 | 2578 | vm_stop(RUN_STATE_INTERNAL_ERROR); |
becfc390 AL |
2579 | } |
2580 | ||
d73415a3 | 2581 | qatomic_set(&cpu->exit_request, 0); |
05330448 AL |
2582 | return ret; |
2583 | } | |
2584 | ||
984b5181 | 2585 | int kvm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
2586 | { |
2587 | int ret; | |
984b5181 AL |
2588 | void *arg; |
2589 | va_list ap; | |
05330448 | 2590 | |
984b5181 AL |
2591 | va_start(ap, type); |
2592 | arg = va_arg(ap, void *); | |
2593 | va_end(ap); | |
2594 | ||
9c775729 | 2595 | trace_kvm_ioctl(type, arg); |
984b5181 | 2596 | ret = ioctl(s->fd, type, arg); |
a426e122 | 2597 | if (ret == -1) { |
05330448 | 2598 | ret = -errno; |
a426e122 | 2599 | } |
05330448 AL |
2600 | return ret; |
2601 | } | |
2602 | ||
984b5181 | 2603 | int kvm_vm_ioctl(KVMState *s, int type, ...) |
05330448 AL |
2604 | { |
2605 | int ret; | |
984b5181 AL |
2606 | void *arg; |
2607 | va_list ap; | |
2608 | ||
2609 | va_start(ap, type); | |
2610 | arg = va_arg(ap, void *); | |
2611 | va_end(ap); | |
05330448 | 2612 | |
9c775729 | 2613 | trace_kvm_vm_ioctl(type, arg); |
984b5181 | 2614 | ret = ioctl(s->vmfd, type, arg); |
a426e122 | 2615 | if (ret == -1) { |
05330448 | 2616 | ret = -errno; |
a426e122 | 2617 | } |
05330448 AL |
2618 | return ret; |
2619 | } | |
2620 | ||
1bc22652 | 2621 | int kvm_vcpu_ioctl(CPUState *cpu, int type, ...) |
05330448 AL |
2622 | { |
2623 | int ret; | |
984b5181 AL |
2624 | void *arg; |
2625 | va_list ap; | |
2626 | ||
2627 | va_start(ap, type); | |
2628 | arg = va_arg(ap, void *); | |
2629 | va_end(ap); | |
05330448 | 2630 | |
9c775729 | 2631 | trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg); |
8737c51c | 2632 | ret = ioctl(cpu->kvm_fd, type, arg); |
a426e122 | 2633 | if (ret == -1) { |
05330448 | 2634 | ret = -errno; |
a426e122 | 2635 | } |
05330448 AL |
2636 | return ret; |
2637 | } | |
bd322087 | 2638 | |
0a6a7cca CD |
2639 | int kvm_device_ioctl(int fd, int type, ...) |
2640 | { | |
2641 | int ret; | |
2642 | void *arg; | |
2643 | va_list ap; | |
2644 | ||
2645 | va_start(ap, type); | |
2646 | arg = va_arg(ap, void *); | |
2647 | va_end(ap); | |
2648 | ||
2649 | trace_kvm_device_ioctl(fd, type, arg); | |
2650 | ret = ioctl(fd, type, arg); | |
2651 | if (ret == -1) { | |
2652 | ret = -errno; | |
2653 | } | |
2654 | return ret; | |
2655 | } | |
2656 | ||
d0a073a1 DD |
2657 | int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr) |
2658 | { | |
2659 | int ret; | |
2660 | struct kvm_device_attr attribute = { | |
2661 | .group = group, | |
2662 | .attr = attr, | |
2663 | }; | |
2664 | ||
2665 | if (!kvm_vm_attributes_allowed) { | |
2666 | return 0; | |
2667 | } | |
2668 | ||
2669 | ret = kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attribute); | |
2670 | /* kvm returns 0 on success for HAS_DEVICE_ATTR */ | |
2671 | return ret ? 0 : 1; | |
2672 | } | |
2673 | ||
4b3cfe72 PF |
2674 | int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr) |
2675 | { | |
2676 | struct kvm_device_attr attribute = { | |
2677 | .group = group, | |
2678 | .attr = attr, | |
2679 | .flags = 0, | |
2680 | }; | |
2681 | ||
2682 | return kvm_device_ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute) ? 0 : 1; | |
2683 | } | |
2684 | ||
556969e9 EA |
2685 | int kvm_device_access(int fd, int group, uint64_t attr, |
2686 | void *val, bool write, Error **errp) | |
4b3cfe72 PF |
2687 | { |
2688 | struct kvm_device_attr kvmattr; | |
2689 | int err; | |
2690 | ||
2691 | kvmattr.flags = 0; | |
2692 | kvmattr.group = group; | |
2693 | kvmattr.attr = attr; | |
2694 | kvmattr.addr = (uintptr_t)val; | |
2695 | ||
2696 | err = kvm_device_ioctl(fd, | |
2697 | write ? KVM_SET_DEVICE_ATTR : KVM_GET_DEVICE_ATTR, | |
2698 | &kvmattr); | |
2699 | if (err < 0) { | |
556969e9 EA |
2700 | error_setg_errno(errp, -err, |
2701 | "KVM_%s_DEVICE_ATTR failed: Group %d " | |
2702 | "attr 0x%016" PRIx64, | |
2703 | write ? "SET" : "GET", group, attr); | |
4b3cfe72 | 2704 | } |
556969e9 | 2705 | return err; |
4b3cfe72 PF |
2706 | } |
2707 | ||
62dd4eda | 2708 | bool kvm_has_sync_mmu(void) |
bd322087 | 2709 | { |
62dd4eda | 2710 | return kvm_state->sync_mmu; |
bd322087 | 2711 | } |
e22a25c9 | 2712 | |
a0fb002c JK |
2713 | int kvm_has_vcpu_events(void) |
2714 | { | |
2715 | return kvm_state->vcpu_events; | |
2716 | } | |
2717 | ||
b0b1d690 JK |
2718 | int kvm_has_robust_singlestep(void) |
2719 | { | |
2720 | return kvm_state->robust_singlestep; | |
2721 | } | |
2722 | ||
ff44f1a3 JK |
2723 | int kvm_has_debugregs(void) |
2724 | { | |
2725 | return kvm_state->debugregs; | |
2726 | } | |
2727 | ||
ebbfef2f LA |
2728 | int kvm_max_nested_state_length(void) |
2729 | { | |
2730 | return kvm_state->max_nested_state_len; | |
2731 | } | |
2732 | ||
d2f2b8a7 SH |
2733 | int kvm_has_many_ioeventfds(void) |
2734 | { | |
2735 | if (!kvm_enabled()) { | |
2736 | return 0; | |
2737 | } | |
2738 | return kvm_state->many_ioeventfds; | |
2739 | } | |
2740 | ||
84b058d7 JK |
2741 | int kvm_has_gsi_routing(void) |
2742 | { | |
a9c5eb0d | 2743 | #ifdef KVM_CAP_IRQ_ROUTING |
84b058d7 | 2744 | return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING); |
a9c5eb0d AG |
2745 | #else |
2746 | return false; | |
2747 | #endif | |
84b058d7 JK |
2748 | } |
2749 | ||
3ab73842 JK |
2750 | int kvm_has_intx_set_mask(void) |
2751 | { | |
2752 | return kvm_state->intx_set_mask; | |
2753 | } | |
2754 | ||
5d721b78 AG |
2755 | bool kvm_arm_supports_user_irq(void) |
2756 | { | |
2757 | return kvm_check_extension(kvm_state, KVM_CAP_ARM_USER_IRQ); | |
2758 | } | |
2759 | ||
e22a25c9 | 2760 | #ifdef KVM_CAP_SET_GUEST_DEBUG |
a60f24b5 | 2761 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu, |
e22a25c9 AL |
2762 | target_ulong pc) |
2763 | { | |
2764 | struct kvm_sw_breakpoint *bp; | |
2765 | ||
a60f24b5 | 2766 | QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) { |
a426e122 | 2767 | if (bp->pc == pc) { |
e22a25c9 | 2768 | return bp; |
a426e122 | 2769 | } |
e22a25c9 AL |
2770 | } |
2771 | return NULL; | |
2772 | } | |
2773 | ||
a60f24b5 | 2774 | int kvm_sw_breakpoints_active(CPUState *cpu) |
e22a25c9 | 2775 | { |
a60f24b5 | 2776 | return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints); |
e22a25c9 AL |
2777 | } |
2778 | ||
452e4751 GC |
2779 | struct kvm_set_guest_debug_data { |
2780 | struct kvm_guest_debug dbg; | |
452e4751 GC |
2781 | int err; |
2782 | }; | |
2783 | ||
14e6fe12 | 2784 | static void kvm_invoke_set_guest_debug(CPUState *cpu, run_on_cpu_data data) |
452e4751 | 2785 | { |
14e6fe12 PB |
2786 | struct kvm_set_guest_debug_data *dbg_data = |
2787 | (struct kvm_set_guest_debug_data *) data.host_ptr; | |
b3807725 | 2788 | |
3c0ed2a3 | 2789 | dbg_data->err = kvm_vcpu_ioctl(cpu, KVM_SET_GUEST_DEBUG, |
a60f24b5 | 2790 | &dbg_data->dbg); |
452e4751 GC |
2791 | } |
2792 | ||
38e478ec | 2793 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 | 2794 | { |
452e4751 | 2795 | struct kvm_set_guest_debug_data data; |
e22a25c9 | 2796 | |
b0b1d690 | 2797 | data.dbg.control = reinject_trap; |
e22a25c9 | 2798 | |
ed2803da | 2799 | if (cpu->singlestep_enabled) { |
b0b1d690 JK |
2800 | data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
2801 | } | |
20d695a9 | 2802 | kvm_arch_update_guest_debug(cpu, &data.dbg); |
e22a25c9 | 2803 | |
14e6fe12 PB |
2804 | run_on_cpu(cpu, kvm_invoke_set_guest_debug, |
2805 | RUN_ON_CPU_HOST_PTR(&data)); | |
452e4751 | 2806 | return data.err; |
e22a25c9 AL |
2807 | } |
2808 | ||
62278814 | 2809 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2810 | target_ulong len, int type) |
2811 | { | |
2812 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
2813 | int err; |
2814 | ||
2815 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 2816 | bp = kvm_find_sw_breakpoint(cpu, addr); |
e22a25c9 AL |
2817 | if (bp) { |
2818 | bp->use_count++; | |
2819 | return 0; | |
2820 | } | |
2821 | ||
7267c094 | 2822 | bp = g_malloc(sizeof(struct kvm_sw_breakpoint)); |
e22a25c9 AL |
2823 | bp->pc = addr; |
2824 | bp->use_count = 1; | |
80b7cd73 | 2825 | err = kvm_arch_insert_sw_breakpoint(cpu, bp); |
e22a25c9 | 2826 | if (err) { |
7267c094 | 2827 | g_free(bp); |
e22a25c9 AL |
2828 | return err; |
2829 | } | |
2830 | ||
80b7cd73 | 2831 | QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
e22a25c9 AL |
2832 | } else { |
2833 | err = kvm_arch_insert_hw_breakpoint(addr, len, type); | |
a426e122 | 2834 | if (err) { |
e22a25c9 | 2835 | return err; |
a426e122 | 2836 | } |
e22a25c9 AL |
2837 | } |
2838 | ||
bdc44640 | 2839 | CPU_FOREACH(cpu) { |
38e478ec | 2840 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 2841 | if (err) { |
e22a25c9 | 2842 | return err; |
a426e122 | 2843 | } |
e22a25c9 AL |
2844 | } |
2845 | return 0; | |
2846 | } | |
2847 | ||
62278814 | 2848 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2849 | target_ulong len, int type) |
2850 | { | |
2851 | struct kvm_sw_breakpoint *bp; | |
e22a25c9 AL |
2852 | int err; |
2853 | ||
2854 | if (type == GDB_BREAKPOINT_SW) { | |
80b7cd73 | 2855 | bp = kvm_find_sw_breakpoint(cpu, addr); |
a426e122 | 2856 | if (!bp) { |
e22a25c9 | 2857 | return -ENOENT; |
a426e122 | 2858 | } |
e22a25c9 AL |
2859 | |
2860 | if (bp->use_count > 1) { | |
2861 | bp->use_count--; | |
2862 | return 0; | |
2863 | } | |
2864 | ||
80b7cd73 | 2865 | err = kvm_arch_remove_sw_breakpoint(cpu, bp); |
a426e122 | 2866 | if (err) { |
e22a25c9 | 2867 | return err; |
a426e122 | 2868 | } |
e22a25c9 | 2869 | |
80b7cd73 | 2870 | QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
7267c094 | 2871 | g_free(bp); |
e22a25c9 AL |
2872 | } else { |
2873 | err = kvm_arch_remove_hw_breakpoint(addr, len, type); | |
a426e122 | 2874 | if (err) { |
e22a25c9 | 2875 | return err; |
a426e122 | 2876 | } |
e22a25c9 AL |
2877 | } |
2878 | ||
bdc44640 | 2879 | CPU_FOREACH(cpu) { |
38e478ec | 2880 | err = kvm_update_guest_debug(cpu, 0); |
a426e122 | 2881 | if (err) { |
e22a25c9 | 2882 | return err; |
a426e122 | 2883 | } |
e22a25c9 AL |
2884 | } |
2885 | return 0; | |
2886 | } | |
2887 | ||
1d5791f4 | 2888 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
2889 | { |
2890 | struct kvm_sw_breakpoint *bp, *next; | |
80b7cd73 | 2891 | KVMState *s = cpu->kvm_state; |
dc54e252 | 2892 | CPUState *tmpcpu; |
e22a25c9 | 2893 | |
72cf2d4f | 2894 | QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
80b7cd73 | 2895 | if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) { |
e22a25c9 | 2896 | /* Try harder to find a CPU that currently sees the breakpoint. */ |
dc54e252 CG |
2897 | CPU_FOREACH(tmpcpu) { |
2898 | if (kvm_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) { | |
e22a25c9 | 2899 | break; |
a426e122 | 2900 | } |
e22a25c9 AL |
2901 | } |
2902 | } | |
78021d6d JK |
2903 | QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry); |
2904 | g_free(bp); | |
e22a25c9 AL |
2905 | } |
2906 | kvm_arch_remove_all_hw_breakpoints(); | |
2907 | ||
bdc44640 | 2908 | CPU_FOREACH(cpu) { |
38e478ec | 2909 | kvm_update_guest_debug(cpu, 0); |
a426e122 | 2910 | } |
e22a25c9 AL |
2911 | } |
2912 | ||
2913 | #else /* !KVM_CAP_SET_GUEST_DEBUG */ | |
2914 | ||
38e478ec | 2915 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
e22a25c9 AL |
2916 | { |
2917 | return -EINVAL; | |
2918 | } | |
2919 | ||
62278814 | 2920 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2921 | target_ulong len, int type) |
2922 | { | |
2923 | return -EINVAL; | |
2924 | } | |
2925 | ||
62278814 | 2926 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
e22a25c9 AL |
2927 | target_ulong len, int type) |
2928 | { | |
2929 | return -EINVAL; | |
2930 | } | |
2931 | ||
1d5791f4 | 2932 | void kvm_remove_all_breakpoints(CPUState *cpu) |
e22a25c9 AL |
2933 | { |
2934 | } | |
2935 | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ | |
cc84de95 | 2936 | |
18268b60 | 2937 | static int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset) |
cc84de95 | 2938 | { |
aed6efb9 | 2939 | KVMState *s = kvm_state; |
cc84de95 MT |
2940 | struct kvm_signal_mask *sigmask; |
2941 | int r; | |
2942 | ||
7267c094 | 2943 | sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset)); |
cc84de95 | 2944 | |
aed6efb9 | 2945 | sigmask->len = s->sigmask_len; |
cc84de95 | 2946 | memcpy(sigmask->sigset, sigset, sizeof(*sigset)); |
1bc22652 | 2947 | r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask); |
7267c094 | 2948 | g_free(sigmask); |
cc84de95 MT |
2949 | |
2950 | return r; | |
2951 | } | |
4d39892c | 2952 | |
cf0f7cf9 | 2953 | static void kvm_ipi_signal(int sig) |
18268b60 | 2954 | { |
cf0f7cf9 PB |
2955 | if (current_cpu) { |
2956 | assert(kvm_immediate_exit); | |
2957 | kvm_cpu_kick(current_cpu); | |
2958 | } | |
18268b60 PB |
2959 | } |
2960 | ||
2961 | void kvm_init_cpu_signals(CPUState *cpu) | |
2962 | { | |
2963 | int r; | |
2964 | sigset_t set; | |
2965 | struct sigaction sigact; | |
2966 | ||
2967 | memset(&sigact, 0, sizeof(sigact)); | |
cf0f7cf9 | 2968 | sigact.sa_handler = kvm_ipi_signal; |
18268b60 PB |
2969 | sigaction(SIG_IPI, &sigact, NULL); |
2970 | ||
2971 | pthread_sigmask(SIG_BLOCK, NULL, &set); | |
2972 | #if defined KVM_HAVE_MCE_INJECTION | |
2973 | sigdelset(&set, SIGBUS); | |
2974 | pthread_sigmask(SIG_SETMASK, &set, NULL); | |
2975 | #endif | |
2976 | sigdelset(&set, SIG_IPI); | |
cf0f7cf9 PB |
2977 | if (kvm_immediate_exit) { |
2978 | r = pthread_sigmask(SIG_SETMASK, &set, NULL); | |
2979 | } else { | |
2980 | r = kvm_set_signal_mask(cpu, &set); | |
2981 | } | |
18268b60 PB |
2982 | if (r) { |
2983 | fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r)); | |
2984 | exit(1); | |
2985 | } | |
2986 | } | |
2987 | ||
2ae41db2 | 2988 | /* Called asynchronously in VCPU thread. */ |
290adf38 | 2989 | int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) |
a1b87fe0 | 2990 | { |
2ae41db2 PB |
2991 | #ifdef KVM_HAVE_MCE_INJECTION |
2992 | if (have_sigbus_pending) { | |
2993 | return 1; | |
2994 | } | |
2995 | have_sigbus_pending = true; | |
2996 | pending_sigbus_addr = addr; | |
2997 | pending_sigbus_code = code; | |
d73415a3 | 2998 | qatomic_set(&cpu->exit_request, 1); |
2ae41db2 PB |
2999 | return 0; |
3000 | #else | |
3001 | return 1; | |
3002 | #endif | |
a1b87fe0 JK |
3003 | } |
3004 | ||
2ae41db2 | 3005 | /* Called synchronously (via signalfd) in main thread. */ |
a1b87fe0 JK |
3006 | int kvm_on_sigbus(int code, void *addr) |
3007 | { | |
2ae41db2 | 3008 | #ifdef KVM_HAVE_MCE_INJECTION |
4d39892c PB |
3009 | /* Action required MCE kills the process if SIGBUS is blocked. Because |
3010 | * that's what happens in the I/O thread, where we handle MCE via signalfd, | |
3011 | * we can only get action optional here. | |
3012 | */ | |
3013 | assert(code != BUS_MCEERR_AR); | |
3014 | kvm_arch_on_sigbus_vcpu(first_cpu, code, addr); | |
3015 | return 0; | |
2ae41db2 PB |
3016 | #else |
3017 | return 1; | |
3018 | #endif | |
a1b87fe0 | 3019 | } |
0a6a7cca CD |
3020 | |
3021 | int kvm_create_device(KVMState *s, uint64_t type, bool test) | |
3022 | { | |
3023 | int ret; | |
3024 | struct kvm_create_device create_dev; | |
3025 | ||
3026 | create_dev.type = type; | |
3027 | create_dev.fd = -1; | |
3028 | create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0; | |
3029 | ||
3030 | if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) { | |
3031 | return -ENOTSUP; | |
3032 | } | |
3033 | ||
3034 | ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev); | |
3035 | if (ret) { | |
3036 | return ret; | |
3037 | } | |
3038 | ||
3039 | return test ? 0 : create_dev.fd; | |
3040 | } | |
ada4135f | 3041 | |
29039acf PX |
3042 | bool kvm_device_supported(int vmfd, uint64_t type) |
3043 | { | |
3044 | struct kvm_create_device create_dev = { | |
3045 | .type = type, | |
3046 | .fd = -1, | |
3047 | .flags = KVM_CREATE_DEVICE_TEST, | |
3048 | }; | |
3049 | ||
3050 | if (ioctl(vmfd, KVM_CHECK_EXTENSION, KVM_CAP_DEVICE_CTRL) <= 0) { | |
3051 | return false; | |
3052 | } | |
3053 | ||
3054 | return (ioctl(vmfd, KVM_CREATE_DEVICE, &create_dev) >= 0); | |
3055 | } | |
3056 | ||
ada4135f CH |
3057 | int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source) |
3058 | { | |
3059 | struct kvm_one_reg reg; | |
3060 | int r; | |
3061 | ||
3062 | reg.id = id; | |
3063 | reg.addr = (uintptr_t) source; | |
3064 | r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); | |
3065 | if (r) { | |
844a3d34 | 3066 | trace_kvm_failed_reg_set(id, strerror(-r)); |
ada4135f CH |
3067 | } |
3068 | return r; | |
3069 | } | |
3070 | ||
3071 | int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target) | |
3072 | { | |
3073 | struct kvm_one_reg reg; | |
3074 | int r; | |
3075 | ||
3076 | reg.id = id; | |
3077 | reg.addr = (uintptr_t) target; | |
3078 | r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); | |
3079 | if (r) { | |
844a3d34 | 3080 | trace_kvm_failed_reg_get(id, strerror(-r)); |
ada4135f CH |
3081 | } |
3082 | return r; | |
3083 | } | |
782c3f29 | 3084 | |
8072aae3 AK |
3085 | static bool kvm_accel_has_memory(MachineState *ms, AddressSpace *as, |
3086 | hwaddr start_addr, hwaddr size) | |
3087 | { | |
3088 | KVMState *kvm = KVM_STATE(ms->accelerator); | |
3089 | int i; | |
3090 | ||
3091 | for (i = 0; i < kvm->nr_as; ++i) { | |
3092 | if (kvm->as[i].as == as && kvm->as[i].ml) { | |
023ae9a8 | 3093 | size = MIN(kvm_max_slot_size, size); |
8072aae3 AK |
3094 | return NULL != kvm_lookup_matching_slot(kvm->as[i].ml, |
3095 | start_addr, size); | |
3096 | } | |
3097 | } | |
3098 | ||
3099 | return false; | |
3100 | } | |
3101 | ||
23b0898e PB |
3102 | static void kvm_get_kvm_shadow_mem(Object *obj, Visitor *v, |
3103 | const char *name, void *opaque, | |
3104 | Error **errp) | |
3105 | { | |
3106 | KVMState *s = KVM_STATE(obj); | |
3107 | int64_t value = s->kvm_shadow_mem; | |
3108 | ||
3109 | visit_type_int(v, name, &value, errp); | |
3110 | } | |
3111 | ||
3112 | static void kvm_set_kvm_shadow_mem(Object *obj, Visitor *v, | |
3113 | const char *name, void *opaque, | |
3114 | Error **errp) | |
3115 | { | |
3116 | KVMState *s = KVM_STATE(obj); | |
23b0898e PB |
3117 | int64_t value; |
3118 | ||
70cbae42 PB |
3119 | if (s->fd != -1) { |
3120 | error_setg(errp, "Cannot set properties after the accelerator has been initialized"); | |
3121 | return; | |
3122 | } | |
3123 | ||
668f62ec | 3124 | if (!visit_type_int(v, name, &value, errp)) { |
23b0898e PB |
3125 | return; |
3126 | } | |
3127 | ||
3128 | s->kvm_shadow_mem = value; | |
3129 | } | |
3130 | ||
11bc4a13 PB |
3131 | static void kvm_set_kernel_irqchip(Object *obj, Visitor *v, |
3132 | const char *name, void *opaque, | |
3133 | Error **errp) | |
3134 | { | |
11bc4a13 PB |
3135 | KVMState *s = KVM_STATE(obj); |
3136 | OnOffSplit mode; | |
3137 | ||
70cbae42 PB |
3138 | if (s->fd != -1) { |
3139 | error_setg(errp, "Cannot set properties after the accelerator has been initialized"); | |
3140 | return; | |
3141 | } | |
3142 | ||
14217038 | 3143 | if (!visit_type_OnOffSplit(v, name, &mode, errp)) { |
11bc4a13 | 3144 | return; |
14217038 MA |
3145 | } |
3146 | switch (mode) { | |
3147 | case ON_OFF_SPLIT_ON: | |
3148 | s->kernel_irqchip_allowed = true; | |
3149 | s->kernel_irqchip_required = true; | |
3150 | s->kernel_irqchip_split = ON_OFF_AUTO_OFF; | |
3151 | break; | |
3152 | case ON_OFF_SPLIT_OFF: | |
3153 | s->kernel_irqchip_allowed = false; | |
3154 | s->kernel_irqchip_required = false; | |
3155 | s->kernel_irqchip_split = ON_OFF_AUTO_OFF; | |
3156 | break; | |
3157 | case ON_OFF_SPLIT_SPLIT: | |
3158 | s->kernel_irqchip_allowed = true; | |
3159 | s->kernel_irqchip_required = true; | |
3160 | s->kernel_irqchip_split = ON_OFF_AUTO_ON; | |
3161 | break; | |
3162 | default: | |
3163 | /* The value was checked in visit_type_OnOffSplit() above. If | |
3164 | * we get here, then something is wrong in QEMU. | |
3165 | */ | |
3166 | abort(); | |
11bc4a13 PB |
3167 | } |
3168 | } | |
3169 | ||
4376c40d PB |
3170 | bool kvm_kernel_irqchip_allowed(void) |
3171 | { | |
11bc4a13 | 3172 | return kvm_state->kernel_irqchip_allowed; |
4376c40d PB |
3173 | } |
3174 | ||
3175 | bool kvm_kernel_irqchip_required(void) | |
3176 | { | |
11bc4a13 | 3177 | return kvm_state->kernel_irqchip_required; |
4376c40d PB |
3178 | } |
3179 | ||
3180 | bool kvm_kernel_irqchip_split(void) | |
3181 | { | |
d1972be1 | 3182 | return kvm_state->kernel_irqchip_split == ON_OFF_AUTO_ON; |
4376c40d PB |
3183 | } |
3184 | ||
23b0898e PB |
3185 | static void kvm_accel_instance_init(Object *obj) |
3186 | { | |
3187 | KVMState *s = KVM_STATE(obj); | |
3188 | ||
70cbae42 PB |
3189 | s->fd = -1; |
3190 | s->vmfd = -1; | |
23b0898e | 3191 | s->kvm_shadow_mem = -1; |
d1972be1 XL |
3192 | s->kernel_irqchip_allowed = true; |
3193 | s->kernel_irqchip_split = ON_OFF_AUTO_AUTO; | |
23b0898e PB |
3194 | } |
3195 | ||
782c3f29 EH |
3196 | static void kvm_accel_class_init(ObjectClass *oc, void *data) |
3197 | { | |
3198 | AccelClass *ac = ACCEL_CLASS(oc); | |
3199 | ac->name = "KVM"; | |
0d15da8e | 3200 | ac->init_machine = kvm_init; |
8072aae3 | 3201 | ac->has_memory = kvm_accel_has_memory; |
782c3f29 | 3202 | ac->allowed = &kvm_allowed; |
23b0898e | 3203 | |
11bc4a13 PB |
3204 | object_class_property_add(oc, "kernel-irqchip", "on|off|split", |
3205 | NULL, kvm_set_kernel_irqchip, | |
d2623129 | 3206 | NULL, NULL); |
11bc4a13 | 3207 | object_class_property_set_description(oc, "kernel-irqchip", |
7eecec7d | 3208 | "Configure KVM in-kernel irqchip"); |
11bc4a13 | 3209 | |
23b0898e PB |
3210 | object_class_property_add(oc, "kvm-shadow-mem", "int", |
3211 | kvm_get_kvm_shadow_mem, kvm_set_kvm_shadow_mem, | |
d2623129 | 3212 | NULL, NULL); |
23b0898e | 3213 | object_class_property_set_description(oc, "kvm-shadow-mem", |
7eecec7d | 3214 | "KVM shadow MMU size"); |
782c3f29 EH |
3215 | } |
3216 | ||
3217 | static const TypeInfo kvm_accel_type = { | |
3218 | .name = TYPE_KVM_ACCEL, | |
3219 | .parent = TYPE_ACCEL, | |
23b0898e | 3220 | .instance_init = kvm_accel_instance_init, |
782c3f29 | 3221 | .class_init = kvm_accel_class_init, |
fc02086b | 3222 | .instance_size = sizeof(KVMState), |
782c3f29 EH |
3223 | }; |
3224 | ||
3225 | static void kvm_type_init(void) | |
3226 | { | |
3227 | type_register_static(&kvm_accel_type); | |
3228 | } | |
3229 | ||
3230 | type_init(kvm_type_init); |