4 * Copyright IBM, Corp. 2008
8 * Anthony Liguori <aliguori@us.ibm.com>
9 * Glauber Costa <gcosta@redhat.com>
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/atomic.h"
25 #include "qemu/option.h"
26 #include "qemu/config-file.h"
27 #include "sysemu/sysemu.h"
29 #include "hw/pci/msi.h"
30 #include "exec/gdbstub.h"
31 #include "sysemu/kvm.h"
32 #include "qemu/bswap.h"
33 #include "exec/memory.h"
34 #include "exec/address-spaces.h"
35 #include "qemu/event_notifier.h"
38 /* This check must be after config-host.h is included */
40 #include <sys/eventfd.h>
43 #ifdef CONFIG_VALGRIND_H
44 #include <valgrind/memcheck.h>
47 /* KVM uses PAGE_SIZE in its definition of COALESCED_MMIO_MAX */
48 #define PAGE_SIZE TARGET_PAGE_SIZE
53 #define DPRINTF(fmt, ...) \
54 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
56 #define DPRINTF(fmt, ...) \
60 #define KVM_MSI_HASHTAB_SIZE 256
62 typedef struct KVMSlot
65 ram_addr_t memory_size;
71 typedef struct kvm_dirty_log KVMDirtyLog;
79 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
80 bool coalesced_flush_in_progress;
81 int broken_set_mem_region;
84 int robust_singlestep;
86 #ifdef KVM_CAP_SET_GUEST_DEBUG
87 struct kvm_sw_breakpoint_head kvm_sw_breakpoints;
93 /* The man page (and posix) say ioctl numbers are signed int, but
94 * they're not. Linux, glibc and *BSD all treat ioctl numbers as
95 * unsigned, and treating them as signed here can break things */
96 unsigned irq_set_ioctl;
97 #ifdef KVM_CAP_IRQ_ROUTING
98 struct kvm_irq_routing *irq_routes;
99 int nr_allocated_irq_routes;
100 uint32_t *used_gsi_bitmap;
101 unsigned int gsi_count;
102 QTAILQ_HEAD(msi_hashtab, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE];
108 bool kvm_kernel_irqchip;
109 bool kvm_async_interrupts_allowed;
110 bool kvm_irqfds_allowed;
111 bool kvm_msi_via_irqfd_allowed;
112 bool kvm_gsi_routing_allowed;
114 bool kvm_readonly_mem_allowed;
116 static const KVMCapabilityInfo kvm_required_capabilites[] = {
117 KVM_CAP_INFO(USER_MEMORY),
118 KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS),
122 static KVMSlot *kvm_alloc_slot(KVMState *s)
126 for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
127 if (s->slots[i].memory_size == 0) {
132 fprintf(stderr, "%s: no free slot available\n", __func__);
136 static KVMSlot *kvm_lookup_matching_slot(KVMState *s,
142 for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
143 KVMSlot *mem = &s->slots[i];
145 if (start_addr == mem->start_addr &&
146 end_addr == mem->start_addr + mem->memory_size) {
155 * Find overlapping slot with lowest start address
157 static KVMSlot *kvm_lookup_overlapping_slot(KVMState *s,
161 KVMSlot *found = NULL;
164 for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
165 KVMSlot *mem = &s->slots[i];
167 if (mem->memory_size == 0 ||
168 (found && found->start_addr < mem->start_addr)) {
172 if (end_addr > mem->start_addr &&
173 start_addr < mem->start_addr + mem->memory_size) {
181 int kvm_physical_memory_addr_from_host(KVMState *s, void *ram,
186 for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
187 KVMSlot *mem = &s->slots[i];
189 if (ram >= mem->ram && ram < mem->ram + mem->memory_size) {
190 *phys_addr = mem->start_addr + (ram - mem->ram);
198 static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot)
200 struct kvm_userspace_memory_region mem;
202 mem.slot = slot->slot;
203 mem.guest_phys_addr = slot->start_addr;
204 mem.memory_size = slot->memory_size;
205 mem.userspace_addr = (unsigned long)slot->ram;
206 mem.flags = slot->flags;
207 if (s->migration_log) {
208 mem.flags |= KVM_MEM_LOG_DIRTY_PAGES;
210 return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
213 static void kvm_reset_vcpu(void *opaque)
215 CPUState *cpu = opaque;
217 kvm_arch_reset_vcpu(cpu);
220 int kvm_init_vcpu(CPUState *cpu)
222 KVMState *s = kvm_state;
226 DPRINTF("kvm_init_vcpu\n");
228 ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)kvm_arch_vcpu_id(cpu));
230 DPRINTF("kvm_create_vcpu failed\n");
236 cpu->kvm_vcpu_dirty = true;
238 mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
241 DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n");
245 cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
247 if (cpu->kvm_run == MAP_FAILED) {
249 DPRINTF("mmap'ing vcpu state failed\n");
253 if (s->coalesced_mmio && !s->coalesced_mmio_ring) {
254 s->coalesced_mmio_ring =
255 (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE;
258 ret = kvm_arch_init_vcpu(cpu);
260 qemu_register_reset(kvm_reset_vcpu, cpu);
261 kvm_arch_reset_vcpu(cpu);
268 * dirty pages logging control
271 static int kvm_mem_flags(KVMState *s, bool log_dirty)
273 return log_dirty ? KVM_MEM_LOG_DIRTY_PAGES : 0;
276 static int kvm_slot_dirty_pages_log_change(KVMSlot *mem, bool log_dirty)
278 KVMState *s = kvm_state;
279 int flags, mask = KVM_MEM_LOG_DIRTY_PAGES;
282 old_flags = mem->flags;
284 flags = (mem->flags & ~mask) | kvm_mem_flags(s, log_dirty);
287 /* If nothing changed effectively, no need to issue ioctl */
288 if (s->migration_log) {
289 flags |= KVM_MEM_LOG_DIRTY_PAGES;
292 if (flags == old_flags) {
296 return kvm_set_user_memory_region(s, mem);
299 static int kvm_dirty_pages_log_change(hwaddr phys_addr,
300 ram_addr_t size, bool log_dirty)
302 KVMState *s = kvm_state;
303 KVMSlot *mem = kvm_lookup_matching_slot(s, phys_addr, phys_addr + size);
306 fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-"
307 TARGET_FMT_plx "\n", __func__, phys_addr,
308 (hwaddr)(phys_addr + size - 1));
311 return kvm_slot_dirty_pages_log_change(mem, log_dirty);
314 static void kvm_log_start(MemoryListener *listener,
315 MemoryRegionSection *section)
319 r = kvm_dirty_pages_log_change(section->offset_within_address_space,
320 section->size, true);
326 static void kvm_log_stop(MemoryListener *listener,
327 MemoryRegionSection *section)
331 r = kvm_dirty_pages_log_change(section->offset_within_address_space,
332 section->size, false);
338 static int kvm_set_migration_log(int enable)
340 KVMState *s = kvm_state;
344 s->migration_log = enable;
346 for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
349 if (!mem->memory_size) {
352 if (!!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) == enable) {
355 err = kvm_set_user_memory_region(s, mem);
363 /* get kvm's dirty pages bitmap and update qemu's */
364 static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section,
365 unsigned long *bitmap)
368 unsigned long page_number, c;
370 unsigned int len = ((section->size / getpagesize()) + HOST_LONG_BITS - 1) / HOST_LONG_BITS;
371 unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE;
374 * bitmap-traveling is faster than memory-traveling (for addr...)
375 * especially when most of the memory is not dirty.
377 for (i = 0; i < len; i++) {
378 if (bitmap[i] != 0) {
379 c = leul_to_cpu(bitmap[i]);
383 page_number = (i * HOST_LONG_BITS + j) * hpratio;
384 addr1 = page_number * TARGET_PAGE_SIZE;
385 addr = section->offset_within_region + addr1;
386 memory_region_set_dirty(section->mr, addr,
387 TARGET_PAGE_SIZE * hpratio);
394 #define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1))
397 * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space
398 * This function updates qemu's dirty bitmap using
399 * memory_region_set_dirty(). This means all bits are set
402 * @start_add: start of logged region.
403 * @end_addr: end of logged region.
405 static int kvm_physical_sync_dirty_bitmap(MemoryRegionSection *section)
407 KVMState *s = kvm_state;
408 unsigned long size, allocated_size = 0;
412 hwaddr start_addr = section->offset_within_address_space;
413 hwaddr end_addr = start_addr + section->size;
415 d.dirty_bitmap = NULL;
416 while (start_addr < end_addr) {
417 mem = kvm_lookup_overlapping_slot(s, start_addr, end_addr);
422 /* XXX bad kernel interface alert
423 * For dirty bitmap, kernel allocates array of size aligned to
424 * bits-per-long. But for case when the kernel is 64bits and
425 * the userspace is 32bits, userspace can't align to the same
426 * bits-per-long, since sizeof(long) is different between kernel
427 * and user space. This way, userspace will provide buffer which
428 * may be 4 bytes less than the kernel will use, resulting in
429 * userspace memory corruption (which is not detectable by valgrind
430 * too, in most cases).
431 * So for now, let's align to 64 instead of HOST_LONG_BITS here, in
432 * a hope that sizeof(long) wont become >8 any time soon.
434 size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS),
435 /*HOST_LONG_BITS*/ 64) / 8;
436 if (!d.dirty_bitmap) {
437 d.dirty_bitmap = g_malloc(size);
438 } else if (size > allocated_size) {
439 d.dirty_bitmap = g_realloc(d.dirty_bitmap, size);
441 allocated_size = size;
442 memset(d.dirty_bitmap, 0, allocated_size);
446 if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) {
447 DPRINTF("ioctl failed %d\n", errno);
452 kvm_get_dirty_pages_log_range(section, d.dirty_bitmap);
453 start_addr = mem->start_addr + mem->memory_size;
455 g_free(d.dirty_bitmap);
460 static void kvm_coalesce_mmio_region(MemoryListener *listener,
461 MemoryRegionSection *secion,
462 hwaddr start, hwaddr size)
464 KVMState *s = kvm_state;
466 if (s->coalesced_mmio) {
467 struct kvm_coalesced_mmio_zone zone;
473 (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone);
477 static void kvm_uncoalesce_mmio_region(MemoryListener *listener,
478 MemoryRegionSection *secion,
479 hwaddr start, hwaddr size)
481 KVMState *s = kvm_state;
483 if (s->coalesced_mmio) {
484 struct kvm_coalesced_mmio_zone zone;
490 (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone);
494 int kvm_check_extension(KVMState *s, unsigned int extension)
498 ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension);
506 static int kvm_set_ioeventfd_mmio(int fd, uint32_t addr, uint32_t val,
507 bool assign, uint32_t size, bool datamatch)
510 struct kvm_ioeventfd iofd;
512 iofd.datamatch = datamatch ? val : 0;
518 if (!kvm_enabled()) {
523 iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH;
526 iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
529 ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd);
538 static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val,
539 bool assign, uint32_t size, bool datamatch)
541 struct kvm_ioeventfd kick = {
542 .datamatch = datamatch ? val : 0,
544 .flags = KVM_IOEVENTFD_FLAG_PIO,
549 if (!kvm_enabled()) {
553 kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH;
556 kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
558 r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);
566 static int kvm_check_many_ioeventfds(void)
568 /* Userspace can use ioeventfd for io notification. This requires a host
569 * that supports eventfd(2) and an I/O thread; since eventfd does not
570 * support SIGIO it cannot interrupt the vcpu.
572 * Older kernels have a 6 device limit on the KVM io bus. Find out so we
573 * can avoid creating too many ioeventfds.
575 #if defined(CONFIG_EVENTFD)
578 for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) {
579 ioeventfds[i] = eventfd(0, EFD_CLOEXEC);
580 if (ioeventfds[i] < 0) {
583 ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true);
585 close(ioeventfds[i]);
590 /* Decide whether many devices are supported or not */
591 ret = i == ARRAY_SIZE(ioeventfds);
594 kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true);
595 close(ioeventfds[i]);
603 static const KVMCapabilityInfo *
604 kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list)
607 if (!kvm_check_extension(s, list->value)) {
615 static void kvm_set_phys_mem(MemoryRegionSection *section, bool add)
617 KVMState *s = kvm_state;
620 MemoryRegion *mr = section->mr;
621 bool log_dirty = memory_region_is_logging(mr);
622 hwaddr start_addr = section->offset_within_address_space;
623 ram_addr_t size = section->size;
627 /* kvm works in page size chunks, but the function may be called
628 with sub-page size and unaligned start address. */
629 delta = TARGET_PAGE_ALIGN(size) - size;
635 size &= TARGET_PAGE_MASK;
636 if (!size || (start_addr & ~TARGET_PAGE_MASK)) {
640 if (!memory_region_is_ram(mr)) {
644 ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + delta;
647 mem = kvm_lookup_overlapping_slot(s, start_addr, start_addr + size);
652 if (add && start_addr >= mem->start_addr &&
653 (start_addr + size <= mem->start_addr + mem->memory_size) &&
654 (ram - start_addr == mem->ram - mem->start_addr)) {
655 /* The new slot fits into the existing one and comes with
656 * identical parameters - update flags and done. */
657 kvm_slot_dirty_pages_log_change(mem, log_dirty);
663 if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) {
664 kvm_physical_sync_dirty_bitmap(section);
667 /* unregister the overlapping slot */
668 mem->memory_size = 0;
669 err = kvm_set_user_memory_region(s, mem);
671 fprintf(stderr, "%s: error unregistering overlapping slot: %s\n",
672 __func__, strerror(-err));
676 /* Workaround for older KVM versions: we can't join slots, even not by
677 * unregistering the previous ones and then registering the larger
678 * slot. We have to maintain the existing fragmentation. Sigh.
680 * This workaround assumes that the new slot starts at the same
681 * address as the first existing one. If not or if some overlapping
682 * slot comes around later, we will fail (not seen in practice so far)
683 * - and actually require a recent KVM version. */
684 if (s->broken_set_mem_region &&
685 old.start_addr == start_addr && old.memory_size < size && add) {
686 mem = kvm_alloc_slot(s);
687 mem->memory_size = old.memory_size;
688 mem->start_addr = old.start_addr;
690 mem->flags = kvm_mem_flags(s, log_dirty);
692 err = kvm_set_user_memory_region(s, mem);
694 fprintf(stderr, "%s: error updating slot: %s\n", __func__,
699 start_addr += old.memory_size;
700 ram += old.memory_size;
701 size -= old.memory_size;
705 /* register prefix slot */
706 if (old.start_addr < start_addr) {
707 mem = kvm_alloc_slot(s);
708 mem->memory_size = start_addr - old.start_addr;
709 mem->start_addr = old.start_addr;
711 mem->flags = kvm_mem_flags(s, log_dirty);
713 err = kvm_set_user_memory_region(s, mem);
715 fprintf(stderr, "%s: error registering prefix slot: %s\n",
716 __func__, strerror(-err));
718 fprintf(stderr, "%s: This is probably because your kernel's " \
719 "PAGE_SIZE is too big. Please try to use 4k " \
720 "PAGE_SIZE!\n", __func__);
726 /* register suffix slot */
727 if (old.start_addr + old.memory_size > start_addr + size) {
728 ram_addr_t size_delta;
730 mem = kvm_alloc_slot(s);
731 mem->start_addr = start_addr + size;
732 size_delta = mem->start_addr - old.start_addr;
733 mem->memory_size = old.memory_size - size_delta;
734 mem->ram = old.ram + size_delta;
735 mem->flags = kvm_mem_flags(s, log_dirty);
737 err = kvm_set_user_memory_region(s, mem);
739 fprintf(stderr, "%s: error registering suffix slot: %s\n",
740 __func__, strerror(-err));
746 /* in case the KVM bug workaround already "consumed" the new slot */
753 mem = kvm_alloc_slot(s);
754 mem->memory_size = size;
755 mem->start_addr = start_addr;
757 mem->flags = kvm_mem_flags(s, log_dirty);
759 err = kvm_set_user_memory_region(s, mem);
761 fprintf(stderr, "%s: error registering slot: %s\n", __func__,
767 static void kvm_region_add(MemoryListener *listener,
768 MemoryRegionSection *section)
770 kvm_set_phys_mem(section, true);
773 static void kvm_region_del(MemoryListener *listener,
774 MemoryRegionSection *section)
776 kvm_set_phys_mem(section, false);
779 static void kvm_log_sync(MemoryListener *listener,
780 MemoryRegionSection *section)
784 r = kvm_physical_sync_dirty_bitmap(section);
790 static void kvm_log_global_start(struct MemoryListener *listener)
794 r = kvm_set_migration_log(1);
798 static void kvm_log_global_stop(struct MemoryListener *listener)
802 r = kvm_set_migration_log(0);
806 static void kvm_mem_ioeventfd_add(MemoryListener *listener,
807 MemoryRegionSection *section,
808 bool match_data, uint64_t data,
811 int fd = event_notifier_get_fd(e);
814 r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space,
815 data, true, section->size, match_data);
821 static void kvm_mem_ioeventfd_del(MemoryListener *listener,
822 MemoryRegionSection *section,
823 bool match_data, uint64_t data,
826 int fd = event_notifier_get_fd(e);
829 r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space,
830 data, false, section->size, match_data);
836 static void kvm_io_ioeventfd_add(MemoryListener *listener,
837 MemoryRegionSection *section,
838 bool match_data, uint64_t data,
841 int fd = event_notifier_get_fd(e);
844 r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space,
845 data, true, section->size, match_data);
851 static void kvm_io_ioeventfd_del(MemoryListener *listener,
852 MemoryRegionSection *section,
853 bool match_data, uint64_t data,
857 int fd = event_notifier_get_fd(e);
860 r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space,
861 data, false, section->size, match_data);
867 static MemoryListener kvm_memory_listener = {
868 .region_add = kvm_region_add,
869 .region_del = kvm_region_del,
870 .log_start = kvm_log_start,
871 .log_stop = kvm_log_stop,
872 .log_sync = kvm_log_sync,
873 .log_global_start = kvm_log_global_start,
874 .log_global_stop = kvm_log_global_stop,
875 .eventfd_add = kvm_mem_ioeventfd_add,
876 .eventfd_del = kvm_mem_ioeventfd_del,
877 .coalesced_mmio_add = kvm_coalesce_mmio_region,
878 .coalesced_mmio_del = kvm_uncoalesce_mmio_region,
882 static MemoryListener kvm_io_listener = {
883 .eventfd_add = kvm_io_ioeventfd_add,
884 .eventfd_del = kvm_io_ioeventfd_del,
888 static void kvm_handle_interrupt(CPUState *cpu, int mask)
890 cpu->interrupt_request |= mask;
892 if (!qemu_cpu_is_self(cpu)) {
897 int kvm_set_irq(KVMState *s, int irq, int level)
899 struct kvm_irq_level event;
902 assert(kvm_async_interrupts_enabled());
906 ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event);
908 perror("kvm_set_irq");
912 return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status;
915 #ifdef KVM_CAP_IRQ_ROUTING
916 typedef struct KVMMSIRoute {
917 struct kvm_irq_routing_entry kroute;
918 QTAILQ_ENTRY(KVMMSIRoute) entry;
921 static void set_gsi(KVMState *s, unsigned int gsi)
923 s->used_gsi_bitmap[gsi / 32] |= 1U << (gsi % 32);
926 static void clear_gsi(KVMState *s, unsigned int gsi)
928 s->used_gsi_bitmap[gsi / 32] &= ~(1U << (gsi % 32));
931 static void kvm_init_irq_routing(KVMState *s)
935 gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING);
937 unsigned int gsi_bits, i;
939 /* Round up so we can search ints using ffs */
940 gsi_bits = ALIGN(gsi_count, 32);
941 s->used_gsi_bitmap = g_malloc0(gsi_bits / 8);
942 s->gsi_count = gsi_count;
944 /* Mark any over-allocated bits as already in use */
945 for (i = gsi_count; i < gsi_bits; i++) {
950 s->irq_routes = g_malloc0(sizeof(*s->irq_routes));
951 s->nr_allocated_irq_routes = 0;
953 if (!s->direct_msi) {
954 for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) {
955 QTAILQ_INIT(&s->msi_hashtab[i]);
959 kvm_arch_init_irq_routing(s);
962 static void kvm_irqchip_commit_routes(KVMState *s)
966 s->irq_routes->flags = 0;
967 ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes);
971 static void kvm_add_routing_entry(KVMState *s,
972 struct kvm_irq_routing_entry *entry)
974 struct kvm_irq_routing_entry *new;
977 if (s->irq_routes->nr == s->nr_allocated_irq_routes) {
978 n = s->nr_allocated_irq_routes * 2;
982 size = sizeof(struct kvm_irq_routing);
983 size += n * sizeof(*new);
984 s->irq_routes = g_realloc(s->irq_routes, size);
985 s->nr_allocated_irq_routes = n;
987 n = s->irq_routes->nr++;
988 new = &s->irq_routes->entries[n];
989 memset(new, 0, sizeof(*new));
990 new->gsi = entry->gsi;
991 new->type = entry->type;
992 new->flags = entry->flags;
995 set_gsi(s, entry->gsi);
997 kvm_irqchip_commit_routes(s);
1000 static int kvm_update_routing_entry(KVMState *s,
1001 struct kvm_irq_routing_entry *new_entry)
1003 struct kvm_irq_routing_entry *entry;
1006 for (n = 0; n < s->irq_routes->nr; n++) {
1007 entry = &s->irq_routes->entries[n];
1008 if (entry->gsi != new_entry->gsi) {
1012 entry->type = new_entry->type;
1013 entry->flags = new_entry->flags;
1014 entry->u = new_entry->u;
1016 kvm_irqchip_commit_routes(s);
1024 void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin)
1026 struct kvm_irq_routing_entry e;
1028 assert(pin < s->gsi_count);
1031 e.type = KVM_IRQ_ROUTING_IRQCHIP;
1033 e.u.irqchip.irqchip = irqchip;
1034 e.u.irqchip.pin = pin;
1035 kvm_add_routing_entry(s, &e);
1038 void kvm_irqchip_release_virq(KVMState *s, int virq)
1040 struct kvm_irq_routing_entry *e;
1043 for (i = 0; i < s->irq_routes->nr; i++) {
1044 e = &s->irq_routes->entries[i];
1045 if (e->gsi == virq) {
1046 s->irq_routes->nr--;
1047 *e = s->irq_routes->entries[s->irq_routes->nr];
1053 static unsigned int kvm_hash_msi(uint32_t data)
1055 /* This is optimized for IA32 MSI layout. However, no other arch shall
1056 * repeat the mistake of not providing a direct MSI injection API. */
1060 static void kvm_flush_dynamic_msi_routes(KVMState *s)
1062 KVMMSIRoute *route, *next;
1065 for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) {
1066 QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) {
1067 kvm_irqchip_release_virq(s, route->kroute.gsi);
1068 QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry);
1074 static int kvm_irqchip_get_virq(KVMState *s)
1076 uint32_t *word = s->used_gsi_bitmap;
1077 int max_words = ALIGN(s->gsi_count, 32) / 32;
1082 /* Return the lowest unused GSI in the bitmap */
1083 for (i = 0; i < max_words; i++) {
1084 bit = ffs(~word[i]);
1089 return bit - 1 + i * 32;
1091 if (!s->direct_msi && retry) {
1093 kvm_flush_dynamic_msi_routes(s);
1100 static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg)
1102 unsigned int hash = kvm_hash_msi(msg.data);
1105 QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) {
1106 if (route->kroute.u.msi.address_lo == (uint32_t)msg.address &&
1107 route->kroute.u.msi.address_hi == (msg.address >> 32) &&
1108 route->kroute.u.msi.data == msg.data) {
1115 int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
1120 if (s->direct_msi) {
1121 msi.address_lo = (uint32_t)msg.address;
1122 msi.address_hi = msg.address >> 32;
1123 msi.data = msg.data;
1125 memset(msi.pad, 0, sizeof(msi.pad));
1127 return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi);
1130 route = kvm_lookup_msi_route(s, msg);
1134 virq = kvm_irqchip_get_virq(s);
1139 route = g_malloc(sizeof(KVMMSIRoute));
1140 route->kroute.gsi = virq;
1141 route->kroute.type = KVM_IRQ_ROUTING_MSI;
1142 route->kroute.flags = 0;
1143 route->kroute.u.msi.address_lo = (uint32_t)msg.address;
1144 route->kroute.u.msi.address_hi = msg.address >> 32;
1145 route->kroute.u.msi.data = msg.data;
1147 kvm_add_routing_entry(s, &route->kroute);
1149 QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route,
1153 assert(route->kroute.type == KVM_IRQ_ROUTING_MSI);
1155 return kvm_set_irq(s, route->kroute.gsi, 1);
1158 int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
1160 struct kvm_irq_routing_entry kroute;
1163 if (!kvm_gsi_routing_enabled()) {
1167 virq = kvm_irqchip_get_virq(s);
1173 kroute.type = KVM_IRQ_ROUTING_MSI;
1175 kroute.u.msi.address_lo = (uint32_t)msg.address;
1176 kroute.u.msi.address_hi = msg.address >> 32;
1177 kroute.u.msi.data = msg.data;
1179 kvm_add_routing_entry(s, &kroute);
1184 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg)
1186 struct kvm_irq_routing_entry kroute;
1188 if (!kvm_irqchip_in_kernel()) {
1193 kroute.type = KVM_IRQ_ROUTING_MSI;
1195 kroute.u.msi.address_lo = (uint32_t)msg.address;
1196 kroute.u.msi.address_hi = msg.address >> 32;
1197 kroute.u.msi.data = msg.data;
1199 return kvm_update_routing_entry(s, &kroute);
1202 static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign)
1204 struct kvm_irqfd irqfd = {
1207 .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN,
1210 if (!kvm_irqfds_enabled()) {
1214 return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd);
1217 #else /* !KVM_CAP_IRQ_ROUTING */
1219 static void kvm_init_irq_routing(KVMState *s)
1223 void kvm_irqchip_release_virq(KVMState *s, int virq)
1227 int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
1232 int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
1237 static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign)
1242 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg)
1246 #endif /* !KVM_CAP_IRQ_ROUTING */
1248 int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, int virq)
1250 return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), virq, true);
1253 int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq)
1255 return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), virq, false);
1258 static int kvm_irqchip_create(KVMState *s)
1260 QemuOptsList *list = qemu_find_opts("machine");
1263 if (QTAILQ_EMPTY(&list->head) ||
1264 !qemu_opt_get_bool(QTAILQ_FIRST(&list->head),
1265 "kernel_irqchip", true) ||
1266 !kvm_check_extension(s, KVM_CAP_IRQCHIP)) {
1270 ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP);
1272 fprintf(stderr, "Create kernel irqchip failed\n");
1276 kvm_kernel_irqchip = true;
1277 /* If we have an in-kernel IRQ chip then we must have asynchronous
1278 * interrupt delivery (though the reverse is not necessarily true)
1280 kvm_async_interrupts_allowed = true;
1282 kvm_init_irq_routing(s);
1287 static int kvm_max_vcpus(KVMState *s)
1291 /* Find number of supported CPUs using the recommended
1292 * procedure from the kernel API documentation to cope with
1293 * older kernels that may be missing capabilities.
1295 ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS);
1299 ret = kvm_check_extension(s, KVM_CAP_NR_VCPUS);
1309 static const char upgrade_note[] =
1310 "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
1311 "(see http://sourceforge.net/projects/kvm).\n";
1313 const KVMCapabilityInfo *missing_cap;
1318 s = g_malloc0(sizeof(KVMState));
1321 * On systems where the kernel can support different base page
1322 * sizes, host page size may be different from TARGET_PAGE_SIZE,
1323 * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum
1324 * page size for the system though.
1326 assert(TARGET_PAGE_SIZE <= getpagesize());
1328 #ifdef KVM_CAP_SET_GUEST_DEBUG
1329 QTAILQ_INIT(&s->kvm_sw_breakpoints);
1331 for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
1332 s->slots[i].slot = i;
1335 s->fd = qemu_open("/dev/kvm", O_RDWR);
1337 fprintf(stderr, "Could not access KVM kernel module: %m\n");
1342 ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0);
1343 if (ret < KVM_API_VERSION) {
1347 fprintf(stderr, "kvm version too old\n");
1351 if (ret > KVM_API_VERSION) {
1353 fprintf(stderr, "kvm version not supported\n");
1357 max_vcpus = kvm_max_vcpus(s);
1358 if (smp_cpus > max_vcpus) {
1360 fprintf(stderr, "Number of SMP cpus requested (%d) exceeds max cpus "
1361 "supported by KVM (%d)\n", smp_cpus, max_vcpus);
1365 s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0);
1368 fprintf(stderr, "Please add the 'switch_amode' kernel parameter to "
1369 "your host kernel command line\n");
1375 missing_cap = kvm_check_extension_list(s, kvm_required_capabilites);
1378 kvm_check_extension_list(s, kvm_arch_required_capabilities);
1382 fprintf(stderr, "kvm does not support %s\n%s",
1383 missing_cap->name, upgrade_note);
1387 s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO);
1389 s->broken_set_mem_region = 1;
1390 ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS);
1392 s->broken_set_mem_region = 0;
1395 #ifdef KVM_CAP_VCPU_EVENTS
1396 s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS);
1399 s->robust_singlestep =
1400 kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP);
1402 #ifdef KVM_CAP_DEBUGREGS
1403 s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS);
1406 #ifdef KVM_CAP_XSAVE
1407 s->xsave = kvm_check_extension(s, KVM_CAP_XSAVE);
1411 s->xcrs = kvm_check_extension(s, KVM_CAP_XCRS);
1414 #ifdef KVM_CAP_PIT_STATE2
1415 s->pit_state2 = kvm_check_extension(s, KVM_CAP_PIT_STATE2);
1418 #ifdef KVM_CAP_IRQ_ROUTING
1419 s->direct_msi = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0);
1422 s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3);
1424 s->irq_set_ioctl = KVM_IRQ_LINE;
1425 if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) {
1426 s->irq_set_ioctl = KVM_IRQ_LINE_STATUS;
1429 #ifdef KVM_CAP_READONLY_MEM
1430 kvm_readonly_mem_allowed =
1431 (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0);
1434 ret = kvm_arch_init(s);
1439 ret = kvm_irqchip_create(s);
1445 memory_listener_register(&kvm_memory_listener, &address_space_memory);
1446 memory_listener_register(&kvm_io_listener, &address_space_io);
1448 s->many_ioeventfds = kvm_check_many_ioeventfds();
1450 cpu_interrupt_handler = kvm_handle_interrupt;
1466 static void kvm_handle_io(uint16_t port, void *data, int direction, int size,
1470 uint8_t *ptr = data;
1472 for (i = 0; i < count; i++) {
1473 if (direction == KVM_EXIT_IO_IN) {
1476 stb_p(ptr, cpu_inb(port));
1479 stw_p(ptr, cpu_inw(port));
1482 stl_p(ptr, cpu_inl(port));
1488 cpu_outb(port, ldub_p(ptr));
1491 cpu_outw(port, lduw_p(ptr));
1494 cpu_outl(port, ldl_p(ptr));
1503 static int kvm_handle_internal_error(CPUArchState *env, struct kvm_run *run)
1505 CPUState *cpu = ENV_GET_CPU(env);
1507 fprintf(stderr, "KVM internal error.");
1508 if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) {
1511 fprintf(stderr, " Suberror: %d\n", run->internal.suberror);
1512 for (i = 0; i < run->internal.ndata; ++i) {
1513 fprintf(stderr, "extra data[%d]: %"PRIx64"\n",
1514 i, (uint64_t)run->internal.data[i]);
1517 fprintf(stderr, "\n");
1519 if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) {
1520 fprintf(stderr, "emulation failure\n");
1521 if (!kvm_arch_stop_on_emulation_error(cpu)) {
1522 cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
1523 return EXCP_INTERRUPT;
1526 /* FIXME: Should trigger a qmp message to let management know
1527 * something went wrong.
1532 void kvm_flush_coalesced_mmio_buffer(void)
1534 KVMState *s = kvm_state;
1536 if (s->coalesced_flush_in_progress) {
1540 s->coalesced_flush_in_progress = true;
1542 if (s->coalesced_mmio_ring) {
1543 struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring;
1544 while (ring->first != ring->last) {
1545 struct kvm_coalesced_mmio *ent;
1547 ent = &ring->coalesced_mmio[ring->first];
1549 cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len);
1551 ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX;
1555 s->coalesced_flush_in_progress = false;
1558 static void do_kvm_cpu_synchronize_state(void *arg)
1560 CPUState *cpu = arg;
1562 if (!cpu->kvm_vcpu_dirty) {
1563 kvm_arch_get_registers(cpu);
1564 cpu->kvm_vcpu_dirty = true;
1568 void kvm_cpu_synchronize_state(CPUArchState *env)
1570 CPUState *cpu = ENV_GET_CPU(env);
1572 if (!cpu->kvm_vcpu_dirty) {
1573 run_on_cpu(cpu, do_kvm_cpu_synchronize_state, cpu);
1577 void kvm_cpu_synchronize_post_reset(CPUState *cpu)
1579 kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE);
1580 cpu->kvm_vcpu_dirty = false;
1583 void kvm_cpu_synchronize_post_init(CPUState *cpu)
1585 kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE);
1586 cpu->kvm_vcpu_dirty = false;
1589 int kvm_cpu_exec(CPUArchState *env)
1591 CPUState *cpu = ENV_GET_CPU(env);
1592 struct kvm_run *run = cpu->kvm_run;
1595 DPRINTF("kvm_cpu_exec()\n");
1597 if (kvm_arch_process_async_events(cpu)) {
1598 cpu->exit_request = 0;
1603 if (cpu->kvm_vcpu_dirty) {
1604 kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE);
1605 cpu->kvm_vcpu_dirty = false;
1608 kvm_arch_pre_run(cpu, run);
1609 if (cpu->exit_request) {
1610 DPRINTF("interrupt exit requested\n");
1612 * KVM requires us to reenter the kernel after IO exits to complete
1613 * instruction emulation. This self-signal will ensure that we
1616 qemu_cpu_kick_self();
1618 qemu_mutex_unlock_iothread();
1620 run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0);
1622 qemu_mutex_lock_iothread();
1623 kvm_arch_post_run(cpu, run);
1626 if (run_ret == -EINTR || run_ret == -EAGAIN) {
1627 DPRINTF("io window exit\n");
1628 ret = EXCP_INTERRUPT;
1631 fprintf(stderr, "error: kvm run failed %s\n",
1632 strerror(-run_ret));
1636 trace_kvm_run_exit(cpu->cpu_index, run->exit_reason);
1637 switch (run->exit_reason) {
1639 DPRINTF("handle_io\n");
1640 kvm_handle_io(run->io.port,
1641 (uint8_t *)run + run->io.data_offset,
1648 DPRINTF("handle_mmio\n");
1649 cpu_physical_memory_rw(run->mmio.phys_addr,
1652 run->mmio.is_write);
1655 case KVM_EXIT_IRQ_WINDOW_OPEN:
1656 DPRINTF("irq_window_open\n");
1657 ret = EXCP_INTERRUPT;
1659 case KVM_EXIT_SHUTDOWN:
1660 DPRINTF("shutdown\n");
1661 qemu_system_reset_request();
1662 ret = EXCP_INTERRUPT;
1664 case KVM_EXIT_UNKNOWN:
1665 fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n",
1666 (uint64_t)run->hw.hardware_exit_reason);
1669 case KVM_EXIT_INTERNAL_ERROR:
1670 ret = kvm_handle_internal_error(env, run);
1673 DPRINTF("kvm_arch_handle_exit\n");
1674 ret = kvm_arch_handle_exit(cpu, run);
1680 cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
1681 vm_stop(RUN_STATE_INTERNAL_ERROR);
1684 cpu->exit_request = 0;
1688 int kvm_ioctl(KVMState *s, int type, ...)
1695 arg = va_arg(ap, void *);
1698 trace_kvm_ioctl(type, arg);
1699 ret = ioctl(s->fd, type, arg);
1706 int kvm_vm_ioctl(KVMState *s, int type, ...)
1713 arg = va_arg(ap, void *);
1716 trace_kvm_vm_ioctl(type, arg);
1717 ret = ioctl(s->vmfd, type, arg);
1724 int kvm_vcpu_ioctl(CPUState *cpu, int type, ...)
1731 arg = va_arg(ap, void *);
1734 trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg);
1735 ret = ioctl(cpu->kvm_fd, type, arg);
1742 int kvm_has_sync_mmu(void)
1744 return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU);
1747 int kvm_has_vcpu_events(void)
1749 return kvm_state->vcpu_events;
1752 int kvm_has_robust_singlestep(void)
1754 return kvm_state->robust_singlestep;
1757 int kvm_has_debugregs(void)
1759 return kvm_state->debugregs;
1762 int kvm_has_xsave(void)
1764 return kvm_state->xsave;
1767 int kvm_has_xcrs(void)
1769 return kvm_state->xcrs;
1772 int kvm_has_pit_state2(void)
1774 return kvm_state->pit_state2;
1777 int kvm_has_many_ioeventfds(void)
1779 if (!kvm_enabled()) {
1782 return kvm_state->many_ioeventfds;
1785 int kvm_has_gsi_routing(void)
1787 #ifdef KVM_CAP_IRQ_ROUTING
1788 return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING);
1794 int kvm_has_intx_set_mask(void)
1796 return kvm_state->intx_set_mask;
1799 void *kvm_ram_alloc(ram_addr_t size)
1804 mem = kvm_arch_ram_alloc(size);
1809 return qemu_anon_ram_alloc(size);
1812 void kvm_setup_guest_memory(void *start, size_t size)
1814 #ifdef CONFIG_VALGRIND_H
1815 VALGRIND_MAKE_MEM_DEFINED(start, size);
1817 if (!kvm_has_sync_mmu()) {
1818 int ret = qemu_madvise(start, size, QEMU_MADV_DONTFORK);
1821 perror("qemu_madvise");
1823 "Need MADV_DONTFORK in absence of synchronous KVM MMU\n");
1829 #ifdef KVM_CAP_SET_GUEST_DEBUG
1830 struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu,
1833 struct kvm_sw_breakpoint *bp;
1835 QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) {
1843 int kvm_sw_breakpoints_active(CPUState *cpu)
1845 return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints);
1848 struct kvm_set_guest_debug_data {
1849 struct kvm_guest_debug dbg;
1854 static void kvm_invoke_set_guest_debug(void *data)
1856 struct kvm_set_guest_debug_data *dbg_data = data;
1858 dbg_data->err = kvm_vcpu_ioctl(dbg_data->cpu, KVM_SET_GUEST_DEBUG,
1862 int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap)
1864 CPUState *cpu = ENV_GET_CPU(env);
1865 struct kvm_set_guest_debug_data data;
1867 data.dbg.control = reinject_trap;
1869 if (env->singlestep_enabled) {
1870 data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP;
1872 kvm_arch_update_guest_debug(cpu, &data.dbg);
1875 run_on_cpu(cpu, kvm_invoke_set_guest_debug, &data);
1879 int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,
1880 target_ulong len, int type)
1882 CPUState *current_cpu = ENV_GET_CPU(current_env);
1883 struct kvm_sw_breakpoint *bp;
1887 if (type == GDB_BREAKPOINT_SW) {
1888 bp = kvm_find_sw_breakpoint(current_cpu, addr);
1894 bp = g_malloc(sizeof(struct kvm_sw_breakpoint));
1901 err = kvm_arch_insert_sw_breakpoint(current_cpu, bp);
1907 QTAILQ_INSERT_HEAD(¤t_cpu->kvm_state->kvm_sw_breakpoints,
1910 err = kvm_arch_insert_hw_breakpoint(addr, len, type);
1916 for (env = first_cpu; env != NULL; env = env->next_cpu) {
1917 err = kvm_update_guest_debug(env, 0);
1925 int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr,
1926 target_ulong len, int type)
1928 CPUState *current_cpu = ENV_GET_CPU(current_env);
1929 struct kvm_sw_breakpoint *bp;
1933 if (type == GDB_BREAKPOINT_SW) {
1934 bp = kvm_find_sw_breakpoint(current_cpu, addr);
1939 if (bp->use_count > 1) {
1944 err = kvm_arch_remove_sw_breakpoint(current_cpu, bp);
1949 QTAILQ_REMOVE(¤t_cpu->kvm_state->kvm_sw_breakpoints, bp, entry);
1952 err = kvm_arch_remove_hw_breakpoint(addr, len, type);
1958 for (env = first_cpu; env != NULL; env = env->next_cpu) {
1959 err = kvm_update_guest_debug(env, 0);
1967 void kvm_remove_all_breakpoints(CPUArchState *current_env)
1969 CPUState *current_cpu = ENV_GET_CPU(current_env);
1970 struct kvm_sw_breakpoint *bp, *next;
1971 KVMState *s = current_cpu->kvm_state;
1975 QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) {
1976 if (kvm_arch_remove_sw_breakpoint(current_cpu, bp) != 0) {
1977 /* Try harder to find a CPU that currently sees the breakpoint. */
1978 for (env = first_cpu; env != NULL; env = env->next_cpu) {
1979 cpu = ENV_GET_CPU(env);
1980 if (kvm_arch_remove_sw_breakpoint(cpu, bp) == 0) {
1985 QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry);
1988 kvm_arch_remove_all_hw_breakpoints();
1990 for (env = first_cpu; env != NULL; env = env->next_cpu) {
1991 kvm_update_guest_debug(env, 0);
1995 #else /* !KVM_CAP_SET_GUEST_DEBUG */
1997 int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap)
2002 int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,
2003 target_ulong len, int type)
2008 int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr,
2009 target_ulong len, int type)
2014 void kvm_remove_all_breakpoints(CPUArchState *current_env)
2017 #endif /* !KVM_CAP_SET_GUEST_DEBUG */
2019 int kvm_set_signal_mask(CPUArchState *env, const sigset_t *sigset)
2021 CPUState *cpu = ENV_GET_CPU(env);
2022 struct kvm_signal_mask *sigmask;
2026 return kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, NULL);
2029 sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset));
2032 memcpy(sigmask->sigset, sigset, sizeof(*sigset));
2033 r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask);
2038 int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
2040 return kvm_arch_on_sigbus_vcpu(cpu, code, addr);
2043 int kvm_on_sigbus(int code, void *addr)
2045 return kvm_arch_on_sigbus(code, addr);