4 * Copyright IBM, Corp. 2008
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.
16 #include <sys/types.h>
17 #include <sys/ioctl.h>
21 #include <linux/kvm.h>
23 #include "qemu-common.h"
24 #include "qemu-barrier.h"
25 #include "qemu-option.h"
26 #include "qemu-config.h"
34 #include "exec-memory.h"
35 #include "event_notifier.h"
37 /* This check must be after config-host.h is included */
39 #include <sys/eventfd.h>
42 #ifdef CONFIG_VALGRIND_H
43 #include <valgrind/memcheck.h>
46 /* KVM uses PAGE_SIZE in its definition of COALESCED_MMIO_MAX */
47 #define PAGE_SIZE TARGET_PAGE_SIZE
52 #define DPRINTF(fmt, ...) \
53 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
55 #define DPRINTF(fmt, ...) \
59 #define KVM_MSI_HASHTAB_SIZE 256
61 typedef struct KVMSlot
64 ram_addr_t memory_size;
70 typedef struct kvm_dirty_log KVMDirtyLog;
78 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
79 bool coalesced_flush_in_progress;
80 int broken_set_mem_region;
83 int robust_singlestep;
85 #ifdef KVM_CAP_SET_GUEST_DEBUG
86 struct kvm_sw_breakpoint_head kvm_sw_breakpoints;
92 /* The man page (and posix) say ioctl numbers are signed int, but
93 * they're not. Linux, glibc and *BSD all treat ioctl numbers as
94 * unsigned, and treating them as signed here can break things */
95 unsigned irq_set_ioctl;
96 #ifdef KVM_CAP_IRQ_ROUTING
97 struct kvm_irq_routing *irq_routes;
98 int nr_allocated_irq_routes;
99 uint32_t *used_gsi_bitmap;
100 unsigned int gsi_count;
101 QTAILQ_HEAD(msi_hashtab, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE];
107 bool kvm_kernel_irqchip;
108 bool kvm_async_interrupts_allowed;
109 bool kvm_irqfds_allowed;
110 bool kvm_msi_via_irqfd_allowed;
111 bool kvm_gsi_routing_allowed;
113 static const KVMCapabilityInfo kvm_required_capabilites[] = {
114 KVM_CAP_INFO(USER_MEMORY),
115 KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS),
119 static KVMSlot *kvm_alloc_slot(KVMState *s)
123 for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
124 if (s->slots[i].memory_size == 0) {
129 fprintf(stderr, "%s: no free slot available\n", __func__);
133 static KVMSlot *kvm_lookup_matching_slot(KVMState *s,
139 for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
140 KVMSlot *mem = &s->slots[i];
142 if (start_addr == mem->start_addr &&
143 end_addr == mem->start_addr + mem->memory_size) {
152 * Find overlapping slot with lowest start address
154 static KVMSlot *kvm_lookup_overlapping_slot(KVMState *s,
158 KVMSlot *found = NULL;
161 for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
162 KVMSlot *mem = &s->slots[i];
164 if (mem->memory_size == 0 ||
165 (found && found->start_addr < mem->start_addr)) {
169 if (end_addr > mem->start_addr &&
170 start_addr < mem->start_addr + mem->memory_size) {
178 int kvm_physical_memory_addr_from_host(KVMState *s, void *ram,
183 for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
184 KVMSlot *mem = &s->slots[i];
186 if (ram >= mem->ram && ram < mem->ram + mem->memory_size) {
187 *phys_addr = mem->start_addr + (ram - mem->ram);
195 static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot)
197 struct kvm_userspace_memory_region mem;
199 mem.slot = slot->slot;
200 mem.guest_phys_addr = slot->start_addr;
201 mem.memory_size = slot->memory_size;
202 mem.userspace_addr = (unsigned long)slot->ram;
203 mem.flags = slot->flags;
204 if (s->migration_log) {
205 mem.flags |= KVM_MEM_LOG_DIRTY_PAGES;
207 return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
210 static void kvm_reset_vcpu(void *opaque)
212 CPUState *cpu = opaque;
214 kvm_arch_reset_vcpu(cpu);
217 int kvm_init_vcpu(CPUArchState *env)
219 CPUState *cpu = ENV_GET_CPU(env);
220 KVMState *s = kvm_state;
224 DPRINTF("kvm_init_vcpu\n");
226 ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, env->cpu_index);
228 DPRINTF("kvm_create_vcpu failed\n");
234 cpu->kvm_vcpu_dirty = true;
236 mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
239 DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n");
243 env->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
245 if (env->kvm_run == MAP_FAILED) {
247 DPRINTF("mmap'ing vcpu state failed\n");
251 if (s->coalesced_mmio && !s->coalesced_mmio_ring) {
252 s->coalesced_mmio_ring =
253 (void *)env->kvm_run + s->coalesced_mmio * PAGE_SIZE;
256 ret = kvm_arch_init_vcpu(cpu);
258 qemu_register_reset(kvm_reset_vcpu, cpu);
259 kvm_arch_reset_vcpu(cpu);
266 * dirty pages logging control
269 static int kvm_mem_flags(KVMState *s, bool log_dirty)
271 return log_dirty ? KVM_MEM_LOG_DIRTY_PAGES : 0;
274 static int kvm_slot_dirty_pages_log_change(KVMSlot *mem, bool log_dirty)
276 KVMState *s = kvm_state;
277 int flags, mask = KVM_MEM_LOG_DIRTY_PAGES;
280 old_flags = mem->flags;
282 flags = (mem->flags & ~mask) | kvm_mem_flags(s, log_dirty);
285 /* If nothing changed effectively, no need to issue ioctl */
286 if (s->migration_log) {
287 flags |= KVM_MEM_LOG_DIRTY_PAGES;
290 if (flags == old_flags) {
294 return kvm_set_user_memory_region(s, mem);
297 static int kvm_dirty_pages_log_change(hwaddr phys_addr,
298 ram_addr_t size, bool log_dirty)
300 KVMState *s = kvm_state;
301 KVMSlot *mem = kvm_lookup_matching_slot(s, phys_addr, phys_addr + size);
304 fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-"
305 TARGET_FMT_plx "\n", __func__, phys_addr,
306 (hwaddr)(phys_addr + size - 1));
309 return kvm_slot_dirty_pages_log_change(mem, log_dirty);
312 static void kvm_log_start(MemoryListener *listener,
313 MemoryRegionSection *section)
317 r = kvm_dirty_pages_log_change(section->offset_within_address_space,
318 section->size, true);
324 static void kvm_log_stop(MemoryListener *listener,
325 MemoryRegionSection *section)
329 r = kvm_dirty_pages_log_change(section->offset_within_address_space,
330 section->size, false);
336 static int kvm_set_migration_log(int enable)
338 KVMState *s = kvm_state;
342 s->migration_log = enable;
344 for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
347 if (!mem->memory_size) {
350 if (!!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) == enable) {
353 err = kvm_set_user_memory_region(s, mem);
361 /* get kvm's dirty pages bitmap and update qemu's */
362 static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section,
363 unsigned long *bitmap)
366 unsigned long page_number, c;
368 unsigned int len = ((section->size / getpagesize()) + HOST_LONG_BITS - 1) / HOST_LONG_BITS;
369 unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE;
372 * bitmap-traveling is faster than memory-traveling (for addr...)
373 * especially when most of the memory is not dirty.
375 for (i = 0; i < len; i++) {
376 if (bitmap[i] != 0) {
377 c = leul_to_cpu(bitmap[i]);
381 page_number = (i * HOST_LONG_BITS + j) * hpratio;
382 addr1 = page_number * TARGET_PAGE_SIZE;
383 addr = section->offset_within_region + addr1;
384 memory_region_set_dirty(section->mr, addr,
385 TARGET_PAGE_SIZE * hpratio);
392 #define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1))
395 * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space
396 * This function updates qemu's dirty bitmap using
397 * memory_region_set_dirty(). This means all bits are set
400 * @start_add: start of logged region.
401 * @end_addr: end of logged region.
403 static int kvm_physical_sync_dirty_bitmap(MemoryRegionSection *section)
405 KVMState *s = kvm_state;
406 unsigned long size, allocated_size = 0;
410 hwaddr start_addr = section->offset_within_address_space;
411 hwaddr end_addr = start_addr + section->size;
413 d.dirty_bitmap = NULL;
414 while (start_addr < end_addr) {
415 mem = kvm_lookup_overlapping_slot(s, start_addr, end_addr);
420 /* XXX bad kernel interface alert
421 * For dirty bitmap, kernel allocates array of size aligned to
422 * bits-per-long. But for case when the kernel is 64bits and
423 * the userspace is 32bits, userspace can't align to the same
424 * bits-per-long, since sizeof(long) is different between kernel
425 * and user space. This way, userspace will provide buffer which
426 * may be 4 bytes less than the kernel will use, resulting in
427 * userspace memory corruption (which is not detectable by valgrind
428 * too, in most cases).
429 * So for now, let's align to 64 instead of HOST_LONG_BITS here, in
430 * a hope that sizeof(long) wont become >8 any time soon.
432 size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS),
433 /*HOST_LONG_BITS*/ 64) / 8;
434 if (!d.dirty_bitmap) {
435 d.dirty_bitmap = g_malloc(size);
436 } else if (size > allocated_size) {
437 d.dirty_bitmap = g_realloc(d.dirty_bitmap, size);
439 allocated_size = size;
440 memset(d.dirty_bitmap, 0, allocated_size);
444 if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) {
445 DPRINTF("ioctl failed %d\n", errno);
450 kvm_get_dirty_pages_log_range(section, d.dirty_bitmap);
451 start_addr = mem->start_addr + mem->memory_size;
453 g_free(d.dirty_bitmap);
458 static void kvm_coalesce_mmio_region(MemoryListener *listener,
459 MemoryRegionSection *secion,
460 hwaddr start, hwaddr size)
462 KVMState *s = kvm_state;
464 if (s->coalesced_mmio) {
465 struct kvm_coalesced_mmio_zone zone;
471 (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone);
475 static void kvm_uncoalesce_mmio_region(MemoryListener *listener,
476 MemoryRegionSection *secion,
477 hwaddr start, hwaddr size)
479 KVMState *s = kvm_state;
481 if (s->coalesced_mmio) {
482 struct kvm_coalesced_mmio_zone zone;
488 (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone);
492 int kvm_check_extension(KVMState *s, unsigned int extension)
496 ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension);
504 static int kvm_check_many_ioeventfds(void)
506 /* Userspace can use ioeventfd for io notification. This requires a host
507 * that supports eventfd(2) and an I/O thread; since eventfd does not
508 * support SIGIO it cannot interrupt the vcpu.
510 * Older kernels have a 6 device limit on the KVM io bus. Find out so we
511 * can avoid creating too many ioeventfds.
513 #if defined(CONFIG_EVENTFD)
516 for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) {
517 ioeventfds[i] = eventfd(0, EFD_CLOEXEC);
518 if (ioeventfds[i] < 0) {
521 ret = kvm_set_ioeventfd_pio_word(ioeventfds[i], 0, i, true);
523 close(ioeventfds[i]);
528 /* Decide whether many devices are supported or not */
529 ret = i == ARRAY_SIZE(ioeventfds);
532 kvm_set_ioeventfd_pio_word(ioeventfds[i], 0, i, false);
533 close(ioeventfds[i]);
541 static const KVMCapabilityInfo *
542 kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list)
545 if (!kvm_check_extension(s, list->value)) {
553 static void kvm_set_phys_mem(MemoryRegionSection *section, bool add)
555 KVMState *s = kvm_state;
558 MemoryRegion *mr = section->mr;
559 bool log_dirty = memory_region_is_logging(mr);
560 hwaddr start_addr = section->offset_within_address_space;
561 ram_addr_t size = section->size;
565 /* kvm works in page size chunks, but the function may be called
566 with sub-page size and unaligned start address. */
567 delta = TARGET_PAGE_ALIGN(size) - size;
573 size &= TARGET_PAGE_MASK;
574 if (!size || (start_addr & ~TARGET_PAGE_MASK)) {
578 if (!memory_region_is_ram(mr)) {
582 ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + delta;
585 mem = kvm_lookup_overlapping_slot(s, start_addr, start_addr + size);
590 if (add && start_addr >= mem->start_addr &&
591 (start_addr + size <= mem->start_addr + mem->memory_size) &&
592 (ram - start_addr == mem->ram - mem->start_addr)) {
593 /* The new slot fits into the existing one and comes with
594 * identical parameters - update flags and done. */
595 kvm_slot_dirty_pages_log_change(mem, log_dirty);
601 if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) {
602 kvm_physical_sync_dirty_bitmap(section);
605 /* unregister the overlapping slot */
606 mem->memory_size = 0;
607 err = kvm_set_user_memory_region(s, mem);
609 fprintf(stderr, "%s: error unregistering overlapping slot: %s\n",
610 __func__, strerror(-err));
614 /* Workaround for older KVM versions: we can't join slots, even not by
615 * unregistering the previous ones and then registering the larger
616 * slot. We have to maintain the existing fragmentation. Sigh.
618 * This workaround assumes that the new slot starts at the same
619 * address as the first existing one. If not or if some overlapping
620 * slot comes around later, we will fail (not seen in practice so far)
621 * - and actually require a recent KVM version. */
622 if (s->broken_set_mem_region &&
623 old.start_addr == start_addr && old.memory_size < size && add) {
624 mem = kvm_alloc_slot(s);
625 mem->memory_size = old.memory_size;
626 mem->start_addr = old.start_addr;
628 mem->flags = kvm_mem_flags(s, log_dirty);
630 err = kvm_set_user_memory_region(s, mem);
632 fprintf(stderr, "%s: error updating slot: %s\n", __func__,
637 start_addr += old.memory_size;
638 ram += old.memory_size;
639 size -= old.memory_size;
643 /* register prefix slot */
644 if (old.start_addr < start_addr) {
645 mem = kvm_alloc_slot(s);
646 mem->memory_size = start_addr - old.start_addr;
647 mem->start_addr = old.start_addr;
649 mem->flags = kvm_mem_flags(s, log_dirty);
651 err = kvm_set_user_memory_region(s, mem);
653 fprintf(stderr, "%s: error registering prefix slot: %s\n",
654 __func__, strerror(-err));
656 fprintf(stderr, "%s: This is probably because your kernel's " \
657 "PAGE_SIZE is too big. Please try to use 4k " \
658 "PAGE_SIZE!\n", __func__);
664 /* register suffix slot */
665 if (old.start_addr + old.memory_size > start_addr + size) {
666 ram_addr_t size_delta;
668 mem = kvm_alloc_slot(s);
669 mem->start_addr = start_addr + size;
670 size_delta = mem->start_addr - old.start_addr;
671 mem->memory_size = old.memory_size - size_delta;
672 mem->ram = old.ram + size_delta;
673 mem->flags = kvm_mem_flags(s, log_dirty);
675 err = kvm_set_user_memory_region(s, mem);
677 fprintf(stderr, "%s: error registering suffix slot: %s\n",
678 __func__, strerror(-err));
684 /* in case the KVM bug workaround already "consumed" the new slot */
691 mem = kvm_alloc_slot(s);
692 mem->memory_size = size;
693 mem->start_addr = start_addr;
695 mem->flags = kvm_mem_flags(s, log_dirty);
697 err = kvm_set_user_memory_region(s, mem);
699 fprintf(stderr, "%s: error registering slot: %s\n", __func__,
705 static void kvm_region_add(MemoryListener *listener,
706 MemoryRegionSection *section)
708 kvm_set_phys_mem(section, true);
711 static void kvm_region_del(MemoryListener *listener,
712 MemoryRegionSection *section)
714 kvm_set_phys_mem(section, false);
717 static void kvm_log_sync(MemoryListener *listener,
718 MemoryRegionSection *section)
722 r = kvm_physical_sync_dirty_bitmap(section);
728 static void kvm_log_global_start(struct MemoryListener *listener)
732 r = kvm_set_migration_log(1);
736 static void kvm_log_global_stop(struct MemoryListener *listener)
740 r = kvm_set_migration_log(0);
744 static void kvm_mem_ioeventfd_add(MemoryListener *listener,
745 MemoryRegionSection *section,
746 bool match_data, uint64_t data,
749 int fd = event_notifier_get_fd(e);
752 assert(match_data && section->size <= 8);
754 r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space,
755 data, true, section->size);
761 static void kvm_mem_ioeventfd_del(MemoryListener *listener,
762 MemoryRegionSection *section,
763 bool match_data, uint64_t data,
766 int fd = event_notifier_get_fd(e);
769 r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space,
770 data, false, section->size);
776 static void kvm_io_ioeventfd_add(MemoryListener *listener,
777 MemoryRegionSection *section,
778 bool match_data, uint64_t data,
781 int fd = event_notifier_get_fd(e);
784 assert(match_data && section->size == 2);
786 r = kvm_set_ioeventfd_pio_word(fd, section->offset_within_address_space,
793 static void kvm_io_ioeventfd_del(MemoryListener *listener,
794 MemoryRegionSection *section,
795 bool match_data, uint64_t data,
799 int fd = event_notifier_get_fd(e);
802 r = kvm_set_ioeventfd_pio_word(fd, section->offset_within_address_space,
809 static MemoryListener kvm_memory_listener = {
810 .region_add = kvm_region_add,
811 .region_del = kvm_region_del,
812 .log_start = kvm_log_start,
813 .log_stop = kvm_log_stop,
814 .log_sync = kvm_log_sync,
815 .log_global_start = kvm_log_global_start,
816 .log_global_stop = kvm_log_global_stop,
817 .eventfd_add = kvm_mem_ioeventfd_add,
818 .eventfd_del = kvm_mem_ioeventfd_del,
819 .coalesced_mmio_add = kvm_coalesce_mmio_region,
820 .coalesced_mmio_del = kvm_uncoalesce_mmio_region,
824 static MemoryListener kvm_io_listener = {
825 .eventfd_add = kvm_io_ioeventfd_add,
826 .eventfd_del = kvm_io_ioeventfd_del,
830 static void kvm_handle_interrupt(CPUArchState *env, int mask)
832 CPUState *cpu = ENV_GET_CPU(env);
834 env->interrupt_request |= mask;
836 if (!qemu_cpu_is_self(cpu)) {
841 int kvm_set_irq(KVMState *s, int irq, int level)
843 struct kvm_irq_level event;
846 assert(kvm_async_interrupts_enabled());
850 ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event);
852 perror("kvm_set_irq");
856 return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status;
859 #ifdef KVM_CAP_IRQ_ROUTING
860 typedef struct KVMMSIRoute {
861 struct kvm_irq_routing_entry kroute;
862 QTAILQ_ENTRY(KVMMSIRoute) entry;
865 static void set_gsi(KVMState *s, unsigned int gsi)
867 s->used_gsi_bitmap[gsi / 32] |= 1U << (gsi % 32);
870 static void clear_gsi(KVMState *s, unsigned int gsi)
872 s->used_gsi_bitmap[gsi / 32] &= ~(1U << (gsi % 32));
875 static void kvm_init_irq_routing(KVMState *s)
879 gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING);
881 unsigned int gsi_bits, i;
883 /* Round up so we can search ints using ffs */
884 gsi_bits = ALIGN(gsi_count, 32);
885 s->used_gsi_bitmap = g_malloc0(gsi_bits / 8);
886 s->gsi_count = gsi_count;
888 /* Mark any over-allocated bits as already in use */
889 for (i = gsi_count; i < gsi_bits; i++) {
894 s->irq_routes = g_malloc0(sizeof(*s->irq_routes));
895 s->nr_allocated_irq_routes = 0;
897 if (!s->direct_msi) {
898 for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) {
899 QTAILQ_INIT(&s->msi_hashtab[i]);
903 kvm_arch_init_irq_routing(s);
906 static void kvm_irqchip_commit_routes(KVMState *s)
910 s->irq_routes->flags = 0;
911 ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes);
915 static void kvm_add_routing_entry(KVMState *s,
916 struct kvm_irq_routing_entry *entry)
918 struct kvm_irq_routing_entry *new;
921 if (s->irq_routes->nr == s->nr_allocated_irq_routes) {
922 n = s->nr_allocated_irq_routes * 2;
926 size = sizeof(struct kvm_irq_routing);
927 size += n * sizeof(*new);
928 s->irq_routes = g_realloc(s->irq_routes, size);
929 s->nr_allocated_irq_routes = n;
931 n = s->irq_routes->nr++;
932 new = &s->irq_routes->entries[n];
933 memset(new, 0, sizeof(*new));
934 new->gsi = entry->gsi;
935 new->type = entry->type;
936 new->flags = entry->flags;
939 set_gsi(s, entry->gsi);
941 kvm_irqchip_commit_routes(s);
944 static int kvm_update_routing_entry(KVMState *s,
945 struct kvm_irq_routing_entry *new_entry)
947 struct kvm_irq_routing_entry *entry;
950 for (n = 0; n < s->irq_routes->nr; n++) {
951 entry = &s->irq_routes->entries[n];
952 if (entry->gsi != new_entry->gsi) {
956 entry->type = new_entry->type;
957 entry->flags = new_entry->flags;
958 entry->u = new_entry->u;
960 kvm_irqchip_commit_routes(s);
968 void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin)
970 struct kvm_irq_routing_entry e;
972 assert(pin < s->gsi_count);
975 e.type = KVM_IRQ_ROUTING_IRQCHIP;
977 e.u.irqchip.irqchip = irqchip;
978 e.u.irqchip.pin = pin;
979 kvm_add_routing_entry(s, &e);
982 void kvm_irqchip_release_virq(KVMState *s, int virq)
984 struct kvm_irq_routing_entry *e;
987 for (i = 0; i < s->irq_routes->nr; i++) {
988 e = &s->irq_routes->entries[i];
989 if (e->gsi == virq) {
991 *e = s->irq_routes->entries[s->irq_routes->nr];
996 kvm_irqchip_commit_routes(s);
999 static unsigned int kvm_hash_msi(uint32_t data)
1001 /* This is optimized for IA32 MSI layout. However, no other arch shall
1002 * repeat the mistake of not providing a direct MSI injection API. */
1006 static void kvm_flush_dynamic_msi_routes(KVMState *s)
1008 KVMMSIRoute *route, *next;
1011 for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) {
1012 QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) {
1013 kvm_irqchip_release_virq(s, route->kroute.gsi);
1014 QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry);
1020 static int kvm_irqchip_get_virq(KVMState *s)
1022 uint32_t *word = s->used_gsi_bitmap;
1023 int max_words = ALIGN(s->gsi_count, 32) / 32;
1028 /* Return the lowest unused GSI in the bitmap */
1029 for (i = 0; i < max_words; i++) {
1030 bit = ffs(~word[i]);
1035 return bit - 1 + i * 32;
1037 if (!s->direct_msi && retry) {
1039 kvm_flush_dynamic_msi_routes(s);
1046 static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg)
1048 unsigned int hash = kvm_hash_msi(msg.data);
1051 QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) {
1052 if (route->kroute.u.msi.address_lo == (uint32_t)msg.address &&
1053 route->kroute.u.msi.address_hi == (msg.address >> 32) &&
1054 route->kroute.u.msi.data == msg.data) {
1061 int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
1066 if (s->direct_msi) {
1067 msi.address_lo = (uint32_t)msg.address;
1068 msi.address_hi = msg.address >> 32;
1069 msi.data = msg.data;
1071 memset(msi.pad, 0, sizeof(msi.pad));
1073 return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi);
1076 route = kvm_lookup_msi_route(s, msg);
1080 virq = kvm_irqchip_get_virq(s);
1085 route = g_malloc(sizeof(KVMMSIRoute));
1086 route->kroute.gsi = virq;
1087 route->kroute.type = KVM_IRQ_ROUTING_MSI;
1088 route->kroute.flags = 0;
1089 route->kroute.u.msi.address_lo = (uint32_t)msg.address;
1090 route->kroute.u.msi.address_hi = msg.address >> 32;
1091 route->kroute.u.msi.data = msg.data;
1093 kvm_add_routing_entry(s, &route->kroute);
1095 QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route,
1099 assert(route->kroute.type == KVM_IRQ_ROUTING_MSI);
1101 return kvm_set_irq(s, route->kroute.gsi, 1);
1104 int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
1106 struct kvm_irq_routing_entry kroute;
1109 if (!kvm_gsi_routing_enabled()) {
1113 virq = kvm_irqchip_get_virq(s);
1119 kroute.type = KVM_IRQ_ROUTING_MSI;
1121 kroute.u.msi.address_lo = (uint32_t)msg.address;
1122 kroute.u.msi.address_hi = msg.address >> 32;
1123 kroute.u.msi.data = msg.data;
1125 kvm_add_routing_entry(s, &kroute);
1130 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg)
1132 struct kvm_irq_routing_entry kroute;
1134 if (!kvm_irqchip_in_kernel()) {
1139 kroute.type = KVM_IRQ_ROUTING_MSI;
1141 kroute.u.msi.address_lo = (uint32_t)msg.address;
1142 kroute.u.msi.address_hi = msg.address >> 32;
1143 kroute.u.msi.data = msg.data;
1145 return kvm_update_routing_entry(s, &kroute);
1148 static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign)
1150 struct kvm_irqfd irqfd = {
1153 .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN,
1156 if (!kvm_irqfds_enabled()) {
1160 return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd);
1163 #else /* !KVM_CAP_IRQ_ROUTING */
1165 static void kvm_init_irq_routing(KVMState *s)
1169 void kvm_irqchip_release_virq(KVMState *s, int virq)
1173 int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
1178 int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
1183 static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign)
1187 #endif /* !KVM_CAP_IRQ_ROUTING */
1189 int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, int virq)
1191 return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), virq, true);
1194 int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq)
1196 return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), virq, false);
1199 static int kvm_irqchip_create(KVMState *s)
1201 QemuOptsList *list = qemu_find_opts("machine");
1204 if (QTAILQ_EMPTY(&list->head) ||
1205 !qemu_opt_get_bool(QTAILQ_FIRST(&list->head),
1206 "kernel_irqchip", true) ||
1207 !kvm_check_extension(s, KVM_CAP_IRQCHIP)) {
1211 ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP);
1213 fprintf(stderr, "Create kernel irqchip failed\n");
1217 kvm_kernel_irqchip = true;
1218 /* If we have an in-kernel IRQ chip then we must have asynchronous
1219 * interrupt delivery (though the reverse is not necessarily true)
1221 kvm_async_interrupts_allowed = true;
1223 kvm_init_irq_routing(s);
1228 static int kvm_max_vcpus(KVMState *s)
1232 /* Find number of supported CPUs using the recommended
1233 * procedure from the kernel API documentation to cope with
1234 * older kernels that may be missing capabilities.
1236 ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS);
1240 ret = kvm_check_extension(s, KVM_CAP_NR_VCPUS);
1250 static const char upgrade_note[] =
1251 "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
1252 "(see http://sourceforge.net/projects/kvm).\n";
1254 const KVMCapabilityInfo *missing_cap;
1259 s = g_malloc0(sizeof(KVMState));
1262 * On systems where the kernel can support different base page
1263 * sizes, host page size may be different from TARGET_PAGE_SIZE,
1264 * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum
1265 * page size for the system though.
1267 assert(TARGET_PAGE_SIZE <= getpagesize());
1269 #ifdef KVM_CAP_SET_GUEST_DEBUG
1270 QTAILQ_INIT(&s->kvm_sw_breakpoints);
1272 for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
1273 s->slots[i].slot = i;
1276 s->fd = qemu_open("/dev/kvm", O_RDWR);
1278 fprintf(stderr, "Could not access KVM kernel module: %m\n");
1283 ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0);
1284 if (ret < KVM_API_VERSION) {
1288 fprintf(stderr, "kvm version too old\n");
1292 if (ret > KVM_API_VERSION) {
1294 fprintf(stderr, "kvm version not supported\n");
1298 max_vcpus = kvm_max_vcpus(s);
1299 if (smp_cpus > max_vcpus) {
1301 fprintf(stderr, "Number of SMP cpus requested (%d) exceeds max cpus "
1302 "supported by KVM (%d)\n", smp_cpus, max_vcpus);
1306 s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0);
1309 fprintf(stderr, "Please add the 'switch_amode' kernel parameter to "
1310 "your host kernel command line\n");
1316 missing_cap = kvm_check_extension_list(s, kvm_required_capabilites);
1319 kvm_check_extension_list(s, kvm_arch_required_capabilities);
1323 fprintf(stderr, "kvm does not support %s\n%s",
1324 missing_cap->name, upgrade_note);
1328 s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO);
1330 s->broken_set_mem_region = 1;
1331 ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS);
1333 s->broken_set_mem_region = 0;
1336 #ifdef KVM_CAP_VCPU_EVENTS
1337 s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS);
1340 s->robust_singlestep =
1341 kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP);
1343 #ifdef KVM_CAP_DEBUGREGS
1344 s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS);
1347 #ifdef KVM_CAP_XSAVE
1348 s->xsave = kvm_check_extension(s, KVM_CAP_XSAVE);
1352 s->xcrs = kvm_check_extension(s, KVM_CAP_XCRS);
1355 #ifdef KVM_CAP_PIT_STATE2
1356 s->pit_state2 = kvm_check_extension(s, KVM_CAP_PIT_STATE2);
1359 #ifdef KVM_CAP_IRQ_ROUTING
1360 s->direct_msi = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0);
1363 s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3);
1365 s->irq_set_ioctl = KVM_IRQ_LINE;
1366 if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) {
1367 s->irq_set_ioctl = KVM_IRQ_LINE_STATUS;
1370 ret = kvm_arch_init(s);
1375 ret = kvm_irqchip_create(s);
1381 memory_listener_register(&kvm_memory_listener, &address_space_memory);
1382 memory_listener_register(&kvm_io_listener, &address_space_io);
1384 s->many_ioeventfds = kvm_check_many_ioeventfds();
1386 cpu_interrupt_handler = kvm_handle_interrupt;
1402 static void kvm_handle_io(uint16_t port, void *data, int direction, int size,
1406 uint8_t *ptr = data;
1408 for (i = 0; i < count; i++) {
1409 if (direction == KVM_EXIT_IO_IN) {
1412 stb_p(ptr, cpu_inb(port));
1415 stw_p(ptr, cpu_inw(port));
1418 stl_p(ptr, cpu_inl(port));
1424 cpu_outb(port, ldub_p(ptr));
1427 cpu_outw(port, lduw_p(ptr));
1430 cpu_outl(port, ldl_p(ptr));
1439 static int kvm_handle_internal_error(CPUArchState *env, struct kvm_run *run)
1441 CPUState *cpu = ENV_GET_CPU(env);
1443 fprintf(stderr, "KVM internal error.");
1444 if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) {
1447 fprintf(stderr, " Suberror: %d\n", run->internal.suberror);
1448 for (i = 0; i < run->internal.ndata; ++i) {
1449 fprintf(stderr, "extra data[%d]: %"PRIx64"\n",
1450 i, (uint64_t)run->internal.data[i]);
1453 fprintf(stderr, "\n");
1455 if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) {
1456 fprintf(stderr, "emulation failure\n");
1457 if (!kvm_arch_stop_on_emulation_error(cpu)) {
1458 cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
1459 return EXCP_INTERRUPT;
1462 /* FIXME: Should trigger a qmp message to let management know
1463 * something went wrong.
1468 void kvm_flush_coalesced_mmio_buffer(void)
1470 KVMState *s = kvm_state;
1472 if (s->coalesced_flush_in_progress) {
1476 s->coalesced_flush_in_progress = true;
1478 if (s->coalesced_mmio_ring) {
1479 struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring;
1480 while (ring->first != ring->last) {
1481 struct kvm_coalesced_mmio *ent;
1483 ent = &ring->coalesced_mmio[ring->first];
1485 cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len);
1487 ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX;
1491 s->coalesced_flush_in_progress = false;
1494 static void do_kvm_cpu_synchronize_state(void *arg)
1496 CPUState *cpu = arg;
1498 if (!cpu->kvm_vcpu_dirty) {
1499 kvm_arch_get_registers(cpu);
1500 cpu->kvm_vcpu_dirty = true;
1504 void kvm_cpu_synchronize_state(CPUArchState *env)
1506 CPUState *cpu = ENV_GET_CPU(env);
1508 if (!cpu->kvm_vcpu_dirty) {
1509 run_on_cpu(cpu, do_kvm_cpu_synchronize_state, cpu);
1513 void kvm_cpu_synchronize_post_reset(CPUArchState *env)
1515 CPUState *cpu = ENV_GET_CPU(env);
1517 kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE);
1518 cpu->kvm_vcpu_dirty = false;
1521 void kvm_cpu_synchronize_post_init(CPUArchState *env)
1523 CPUState *cpu = ENV_GET_CPU(env);
1525 kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE);
1526 cpu->kvm_vcpu_dirty = false;
1529 int kvm_cpu_exec(CPUArchState *env)
1531 CPUState *cpu = ENV_GET_CPU(env);
1532 struct kvm_run *run = env->kvm_run;
1535 DPRINTF("kvm_cpu_exec()\n");
1537 if (kvm_arch_process_async_events(cpu)) {
1538 env->exit_request = 0;
1543 if (cpu->kvm_vcpu_dirty) {
1544 kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE);
1545 cpu->kvm_vcpu_dirty = false;
1548 kvm_arch_pre_run(cpu, run);
1549 if (env->exit_request) {
1550 DPRINTF("interrupt exit requested\n");
1552 * KVM requires us to reenter the kernel after IO exits to complete
1553 * instruction emulation. This self-signal will ensure that we
1556 qemu_cpu_kick_self();
1558 qemu_mutex_unlock_iothread();
1560 run_ret = kvm_vcpu_ioctl(env, KVM_RUN, 0);
1562 qemu_mutex_lock_iothread();
1563 kvm_arch_post_run(cpu, run);
1566 if (run_ret == -EINTR || run_ret == -EAGAIN) {
1567 DPRINTF("io window exit\n");
1568 ret = EXCP_INTERRUPT;
1571 fprintf(stderr, "error: kvm run failed %s\n",
1572 strerror(-run_ret));
1576 switch (run->exit_reason) {
1578 DPRINTF("handle_io\n");
1579 kvm_handle_io(run->io.port,
1580 (uint8_t *)run + run->io.data_offset,
1587 DPRINTF("handle_mmio\n");
1588 cpu_physical_memory_rw(run->mmio.phys_addr,
1591 run->mmio.is_write);
1594 case KVM_EXIT_IRQ_WINDOW_OPEN:
1595 DPRINTF("irq_window_open\n");
1596 ret = EXCP_INTERRUPT;
1598 case KVM_EXIT_SHUTDOWN:
1599 DPRINTF("shutdown\n");
1600 qemu_system_reset_request();
1601 ret = EXCP_INTERRUPT;
1603 case KVM_EXIT_UNKNOWN:
1604 fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n",
1605 (uint64_t)run->hw.hardware_exit_reason);
1608 case KVM_EXIT_INTERNAL_ERROR:
1609 ret = kvm_handle_internal_error(env, run);
1612 DPRINTF("kvm_arch_handle_exit\n");
1613 ret = kvm_arch_handle_exit(cpu, run);
1619 cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
1620 vm_stop(RUN_STATE_INTERNAL_ERROR);
1623 env->exit_request = 0;
1627 int kvm_ioctl(KVMState *s, int type, ...)
1634 arg = va_arg(ap, void *);
1637 ret = ioctl(s->fd, type, arg);
1644 int kvm_vm_ioctl(KVMState *s, int type, ...)
1651 arg = va_arg(ap, void *);
1654 ret = ioctl(s->vmfd, type, arg);
1661 int kvm_vcpu_ioctl(CPUArchState *env, int type, ...)
1663 CPUState *cpu = ENV_GET_CPU(env);
1669 arg = va_arg(ap, void *);
1672 ret = ioctl(cpu->kvm_fd, type, arg);
1679 int kvm_has_sync_mmu(void)
1681 return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU);
1684 int kvm_has_vcpu_events(void)
1686 return kvm_state->vcpu_events;
1689 int kvm_has_robust_singlestep(void)
1691 return kvm_state->robust_singlestep;
1694 int kvm_has_debugregs(void)
1696 return kvm_state->debugregs;
1699 int kvm_has_xsave(void)
1701 return kvm_state->xsave;
1704 int kvm_has_xcrs(void)
1706 return kvm_state->xcrs;
1709 int kvm_has_pit_state2(void)
1711 return kvm_state->pit_state2;
1714 int kvm_has_many_ioeventfds(void)
1716 if (!kvm_enabled()) {
1719 return kvm_state->many_ioeventfds;
1722 int kvm_has_gsi_routing(void)
1724 #ifdef KVM_CAP_IRQ_ROUTING
1725 return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING);
1731 int kvm_has_intx_set_mask(void)
1733 return kvm_state->intx_set_mask;
1736 void *kvm_vmalloc(ram_addr_t size)
1741 mem = kvm_arch_vmalloc(size);
1746 return qemu_vmalloc(size);
1749 void kvm_setup_guest_memory(void *start, size_t size)
1751 #ifdef CONFIG_VALGRIND_H
1752 VALGRIND_MAKE_MEM_DEFINED(start, size);
1754 if (!kvm_has_sync_mmu()) {
1755 int ret = qemu_madvise(start, size, QEMU_MADV_DONTFORK);
1758 perror("qemu_madvise");
1760 "Need MADV_DONTFORK in absence of synchronous KVM MMU\n");
1766 #ifdef KVM_CAP_SET_GUEST_DEBUG
1767 struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUArchState *env,
1770 struct kvm_sw_breakpoint *bp;
1772 QTAILQ_FOREACH(bp, &env->kvm_state->kvm_sw_breakpoints, entry) {
1780 int kvm_sw_breakpoints_active(CPUArchState *env)
1782 return !QTAILQ_EMPTY(&env->kvm_state->kvm_sw_breakpoints);
1785 struct kvm_set_guest_debug_data {
1786 struct kvm_guest_debug dbg;
1791 static void kvm_invoke_set_guest_debug(void *data)
1793 struct kvm_set_guest_debug_data *dbg_data = data;
1794 CPUArchState *env = dbg_data->env;
1796 dbg_data->err = kvm_vcpu_ioctl(env, KVM_SET_GUEST_DEBUG, &dbg_data->dbg);
1799 int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap)
1801 CPUState *cpu = ENV_GET_CPU(env);
1802 struct kvm_set_guest_debug_data data;
1804 data.dbg.control = reinject_trap;
1806 if (env->singlestep_enabled) {
1807 data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP;
1809 kvm_arch_update_guest_debug(cpu, &data.dbg);
1812 run_on_cpu(cpu, kvm_invoke_set_guest_debug, &data);
1816 int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,
1817 target_ulong len, int type)
1819 CPUState *current_cpu = ENV_GET_CPU(current_env);
1820 struct kvm_sw_breakpoint *bp;
1824 if (type == GDB_BREAKPOINT_SW) {
1825 bp = kvm_find_sw_breakpoint(current_env, addr);
1831 bp = g_malloc(sizeof(struct kvm_sw_breakpoint));
1838 err = kvm_arch_insert_sw_breakpoint(current_cpu, bp);
1844 QTAILQ_INSERT_HEAD(¤t_env->kvm_state->kvm_sw_breakpoints,
1847 err = kvm_arch_insert_hw_breakpoint(addr, len, type);
1853 for (env = first_cpu; env != NULL; env = env->next_cpu) {
1854 err = kvm_update_guest_debug(env, 0);
1862 int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr,
1863 target_ulong len, int type)
1865 CPUState *current_cpu = ENV_GET_CPU(current_env);
1866 struct kvm_sw_breakpoint *bp;
1870 if (type == GDB_BREAKPOINT_SW) {
1871 bp = kvm_find_sw_breakpoint(current_env, addr);
1876 if (bp->use_count > 1) {
1881 err = kvm_arch_remove_sw_breakpoint(current_cpu, bp);
1886 QTAILQ_REMOVE(¤t_env->kvm_state->kvm_sw_breakpoints, bp, entry);
1889 err = kvm_arch_remove_hw_breakpoint(addr, len, type);
1895 for (env = first_cpu; env != NULL; env = env->next_cpu) {
1896 err = kvm_update_guest_debug(env, 0);
1904 void kvm_remove_all_breakpoints(CPUArchState *current_env)
1906 CPUState *current_cpu = ENV_GET_CPU(current_env);
1907 struct kvm_sw_breakpoint *bp, *next;
1908 KVMState *s = current_env->kvm_state;
1912 QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) {
1913 if (kvm_arch_remove_sw_breakpoint(current_cpu, bp) != 0) {
1914 /* Try harder to find a CPU that currently sees the breakpoint. */
1915 for (env = first_cpu; env != NULL; env = env->next_cpu) {
1916 cpu = ENV_GET_CPU(env);
1917 if (kvm_arch_remove_sw_breakpoint(cpu, bp) == 0) {
1922 QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry);
1925 kvm_arch_remove_all_hw_breakpoints();
1927 for (env = first_cpu; env != NULL; env = env->next_cpu) {
1928 kvm_update_guest_debug(env, 0);
1932 #else /* !KVM_CAP_SET_GUEST_DEBUG */
1934 int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap)
1939 int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,
1940 target_ulong len, int type)
1945 int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr,
1946 target_ulong len, int type)
1951 void kvm_remove_all_breakpoints(CPUArchState *current_env)
1954 #endif /* !KVM_CAP_SET_GUEST_DEBUG */
1956 int kvm_set_signal_mask(CPUArchState *env, const sigset_t *sigset)
1958 struct kvm_signal_mask *sigmask;
1962 return kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, NULL);
1965 sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset));
1968 memcpy(sigmask->sigset, sigset, sizeof(*sigset));
1969 r = kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, sigmask);
1975 int kvm_set_ioeventfd_mmio(int fd, uint32_t addr, uint32_t val, bool assign,
1979 struct kvm_ioeventfd iofd;
1981 iofd.datamatch = val;
1984 iofd.flags = KVM_IOEVENTFD_FLAG_DATAMATCH;
1987 if (!kvm_enabled()) {
1992 iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
1995 ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd);
2004 int kvm_set_ioeventfd_pio_word(int fd, uint16_t addr, uint16_t val, bool assign)
2006 struct kvm_ioeventfd kick = {
2010 .flags = KVM_IOEVENTFD_FLAG_DATAMATCH | KVM_IOEVENTFD_FLAG_PIO,
2014 if (!kvm_enabled()) {
2018 kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
2020 r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);
2027 int kvm_on_sigbus_vcpu(CPUArchState *env, int code, void *addr)
2029 CPUState *cpu = ENV_GET_CPU(env);
2030 return kvm_arch_on_sigbus_vcpu(cpu, code, addr);
2033 int kvm_on_sigbus(int code, void *addr)
2035 return kvm_arch_on_sigbus(code, addr);