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"
29 /* KVM uses PAGE_SIZE in it's definition of COALESCED_MMIO_MAX */
30 #define PAGE_SIZE TARGET_PAGE_SIZE
35 #define dprintf(fmt, ...) \
36 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
38 #define dprintf(fmt, ...) \
42 typedef struct KVMSlot
44 target_phys_addr_t start_addr
;
45 ram_addr_t memory_size
;
46 ram_addr_t phys_offset
;
51 typedef struct kvm_dirty_log KVMDirtyLog
;
62 int broken_set_mem_region
;
64 #ifdef KVM_CAP_SET_GUEST_DEBUG
65 struct kvm_sw_breakpoint_head kvm_sw_breakpoints
;
67 int irqchip_in_kernel
;
71 static KVMState
*kvm_state
;
73 static KVMSlot
*kvm_alloc_slot(KVMState
*s
)
77 for (i
= 0; i
< ARRAY_SIZE(s
->slots
); i
++) {
78 /* KVM private memory slots */
81 if (s
->slots
[i
].memory_size
== 0)
85 fprintf(stderr
, "%s: no free slot available\n", __func__
);
89 static KVMSlot
*kvm_lookup_matching_slot(KVMState
*s
,
90 target_phys_addr_t start_addr
,
91 target_phys_addr_t end_addr
)
95 for (i
= 0; i
< ARRAY_SIZE(s
->slots
); i
++) {
96 KVMSlot
*mem
= &s
->slots
[i
];
98 if (start_addr
== mem
->start_addr
&&
99 end_addr
== mem
->start_addr
+ mem
->memory_size
) {
108 * Find overlapping slot with lowest start address
110 static KVMSlot
*kvm_lookup_overlapping_slot(KVMState
*s
,
111 target_phys_addr_t start_addr
,
112 target_phys_addr_t end_addr
)
114 KVMSlot
*found
= NULL
;
117 for (i
= 0; i
< ARRAY_SIZE(s
->slots
); i
++) {
118 KVMSlot
*mem
= &s
->slots
[i
];
120 if (mem
->memory_size
== 0 ||
121 (found
&& found
->start_addr
< mem
->start_addr
)) {
125 if (end_addr
> mem
->start_addr
&&
126 start_addr
< mem
->start_addr
+ mem
->memory_size
) {
134 static int kvm_set_user_memory_region(KVMState
*s
, KVMSlot
*slot
)
136 struct kvm_userspace_memory_region mem
;
138 mem
.slot
= slot
->slot
;
139 mem
.guest_phys_addr
= slot
->start_addr
;
140 mem
.memory_size
= slot
->memory_size
;
141 mem
.userspace_addr
= (unsigned long)qemu_get_ram_ptr(slot
->phys_offset
);
142 mem
.flags
= slot
->flags
;
143 if (s
->migration_log
) {
144 mem
.flags
|= KVM_MEM_LOG_DIRTY_PAGES
;
146 return kvm_vm_ioctl(s
, KVM_SET_USER_MEMORY_REGION
, &mem
);
149 static void kvm_reset_vcpu(void *opaque
)
151 CPUState
*env
= opaque
;
153 if (kvm_arch_put_registers(env
)) {
154 fprintf(stderr
, "Fatal: kvm vcpu reset failed\n");
159 int kvm_irqchip_in_kernel(void)
161 return kvm_state
->irqchip_in_kernel
;
164 int kvm_pit_in_kernel(void)
166 return kvm_state
->pit_in_kernel
;
170 int kvm_init_vcpu(CPUState
*env
)
172 KVMState
*s
= kvm_state
;
176 dprintf("kvm_init_vcpu\n");
178 ret
= kvm_vm_ioctl(s
, KVM_CREATE_VCPU
, env
->cpu_index
);
180 dprintf("kvm_create_vcpu failed\n");
187 mmap_size
= kvm_ioctl(s
, KVM_GET_VCPU_MMAP_SIZE
, 0);
189 dprintf("KVM_GET_VCPU_MMAP_SIZE failed\n");
193 env
->kvm_run
= mmap(NULL
, mmap_size
, PROT_READ
| PROT_WRITE
, MAP_SHARED
,
195 if (env
->kvm_run
== MAP_FAILED
) {
197 dprintf("mmap'ing vcpu state failed\n");
201 ret
= kvm_arch_init_vcpu(env
);
203 qemu_register_reset(kvm_reset_vcpu
, env
);
204 ret
= kvm_arch_put_registers(env
);
211 * dirty pages logging control
213 static int kvm_dirty_pages_log_change(target_phys_addr_t phys_addr
,
214 ram_addr_t size
, int flags
, int mask
)
216 KVMState
*s
= kvm_state
;
217 KVMSlot
*mem
= kvm_lookup_matching_slot(s
, phys_addr
, phys_addr
+ size
);
221 fprintf(stderr
, "BUG: %s: invalid parameters " TARGET_FMT_plx
"-"
222 TARGET_FMT_plx
"\n", __func__
, phys_addr
,
223 (target_phys_addr_t
)(phys_addr
+ size
- 1));
227 old_flags
= mem
->flags
;
229 flags
= (mem
->flags
& ~mask
) | flags
;
232 /* If nothing changed effectively, no need to issue ioctl */
233 if (s
->migration_log
) {
234 flags
|= KVM_MEM_LOG_DIRTY_PAGES
;
236 if (flags
== old_flags
) {
240 return kvm_set_user_memory_region(s
, mem
);
243 int kvm_log_start(target_phys_addr_t phys_addr
, ram_addr_t size
)
245 return kvm_dirty_pages_log_change(phys_addr
, size
,
246 KVM_MEM_LOG_DIRTY_PAGES
,
247 KVM_MEM_LOG_DIRTY_PAGES
);
250 int kvm_log_stop(target_phys_addr_t phys_addr
, ram_addr_t size
)
252 return kvm_dirty_pages_log_change(phys_addr
, size
,
254 KVM_MEM_LOG_DIRTY_PAGES
);
257 int kvm_set_migration_log(int enable
)
259 KVMState
*s
= kvm_state
;
263 s
->migration_log
= enable
;
265 for (i
= 0; i
< ARRAY_SIZE(s
->slots
); i
++) {
268 if (!!(mem
->flags
& KVM_MEM_LOG_DIRTY_PAGES
) == enable
) {
271 err
= kvm_set_user_memory_region(s
, mem
);
279 static int test_le_bit(unsigned long nr
, unsigned char *addr
)
281 return (addr
[nr
>> 3] >> (nr
& 7)) & 1;
285 * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space
286 * This function updates qemu's dirty bitmap using cpu_physical_memory_set_dirty().
287 * This means all bits are set to dirty.
289 * @start_add: start of logged region.
290 * @end_addr: end of logged region.
292 int kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr
,
293 target_phys_addr_t end_addr
)
295 KVMState
*s
= kvm_state
;
296 unsigned long size
, allocated_size
= 0;
297 target_phys_addr_t phys_addr
;
303 d
.dirty_bitmap
= NULL
;
304 while (start_addr
< end_addr
) {
305 mem
= kvm_lookup_overlapping_slot(s
, start_addr
, end_addr
);
310 size
= ((mem
->memory_size
>> TARGET_PAGE_BITS
) + 7) / 8;
311 if (!d
.dirty_bitmap
) {
312 d
.dirty_bitmap
= qemu_malloc(size
);
313 } else if (size
> allocated_size
) {
314 d
.dirty_bitmap
= qemu_realloc(d
.dirty_bitmap
, size
);
316 allocated_size
= size
;
317 memset(d
.dirty_bitmap
, 0, allocated_size
);
321 if (kvm_vm_ioctl(s
, KVM_GET_DIRTY_LOG
, &d
) == -1) {
322 dprintf("ioctl failed %d\n", errno
);
327 for (phys_addr
= mem
->start_addr
, addr
= mem
->phys_offset
;
328 phys_addr
< mem
->start_addr
+ mem
->memory_size
;
329 phys_addr
+= TARGET_PAGE_SIZE
, addr
+= TARGET_PAGE_SIZE
) {
330 unsigned char *bitmap
= (unsigned char *)d
.dirty_bitmap
;
331 unsigned nr
= (phys_addr
- mem
->start_addr
) >> TARGET_PAGE_BITS
;
333 if (test_le_bit(nr
, bitmap
)) {
334 cpu_physical_memory_set_dirty(addr
);
337 start_addr
= phys_addr
;
339 qemu_free(d
.dirty_bitmap
);
344 int kvm_coalesce_mmio_region(target_phys_addr_t start
, ram_addr_t size
)
347 #ifdef KVM_CAP_COALESCED_MMIO
348 KVMState
*s
= kvm_state
;
350 if (s
->coalesced_mmio
) {
351 struct kvm_coalesced_mmio_zone zone
;
356 ret
= kvm_vm_ioctl(s
, KVM_REGISTER_COALESCED_MMIO
, &zone
);
363 int kvm_uncoalesce_mmio_region(target_phys_addr_t start
, ram_addr_t size
)
366 #ifdef KVM_CAP_COALESCED_MMIO
367 KVMState
*s
= kvm_state
;
369 if (s
->coalesced_mmio
) {
370 struct kvm_coalesced_mmio_zone zone
;
375 ret
= kvm_vm_ioctl(s
, KVM_UNREGISTER_COALESCED_MMIO
, &zone
);
382 int kvm_check_extension(KVMState
*s
, unsigned int extension
)
386 ret
= kvm_ioctl(s
, KVM_CHECK_EXTENSION
, extension
);
394 int kvm_init(int smp_cpus
)
396 static const char upgrade_note
[] =
397 "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
398 "(see http://sourceforge.net/projects/kvm).\n";
404 fprintf(stderr
, "No SMP KVM support, use '-smp 1'\n");
408 s
= qemu_mallocz(sizeof(KVMState
));
410 #ifdef KVM_CAP_SET_GUEST_DEBUG
411 QTAILQ_INIT(&s
->kvm_sw_breakpoints
);
413 for (i
= 0; i
< ARRAY_SIZE(s
->slots
); i
++)
414 s
->slots
[i
].slot
= i
;
417 s
->fd
= open("/dev/kvm", O_RDWR
);
419 fprintf(stderr
, "Could not access KVM kernel module: %m\n");
424 ret
= kvm_ioctl(s
, KVM_GET_API_VERSION
, 0);
425 if (ret
< KVM_API_VERSION
) {
428 fprintf(stderr
, "kvm version too old\n");
432 if (ret
> KVM_API_VERSION
) {
434 fprintf(stderr
, "kvm version not supported\n");
438 s
->vmfd
= kvm_ioctl(s
, KVM_CREATE_VM
, 0);
442 /* initially, KVM allocated its own memory and we had to jump through
443 * hooks to make phys_ram_base point to this. Modern versions of KVM
444 * just use a user allocated buffer so we can use regular pages
445 * unmodified. Make sure we have a sufficiently modern version of KVM.
447 if (!kvm_check_extension(s
, KVM_CAP_USER_MEMORY
)) {
449 fprintf(stderr
, "kvm does not support KVM_CAP_USER_MEMORY\n%s",
454 /* There was a nasty bug in < kvm-80 that prevents memory slots from being
455 * destroyed properly. Since we rely on this capability, refuse to work
456 * with any kernel without this capability. */
457 if (!kvm_check_extension(s
, KVM_CAP_DESTROY_MEMORY_REGION_WORKS
)) {
461 "KVM kernel module broken (DESTROY_MEMORY_REGION).\n%s",
466 #ifdef KVM_CAP_COALESCED_MMIO
467 s
->coalesced_mmio
= kvm_check_extension(s
, KVM_CAP_COALESCED_MMIO
);
469 s
->coalesced_mmio
= 0;
472 s
->broken_set_mem_region
= 1;
473 #ifdef KVM_CAP_JOIN_MEMORY_REGIONS_WORKS
474 ret
= kvm_ioctl(s
, KVM_CHECK_EXTENSION
, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS
);
476 s
->broken_set_mem_region
= 0;
480 ret
= kvm_arch_init(s
, smp_cpus
);
500 static int kvm_handle_io(uint16_t port
, void *data
, int direction
, int size
,
506 for (i
= 0; i
< count
; i
++) {
507 if (direction
== KVM_EXIT_IO_IN
) {
510 stb_p(ptr
, cpu_inb(port
));
513 stw_p(ptr
, cpu_inw(port
));
516 stl_p(ptr
, cpu_inl(port
));
522 cpu_outb(port
, ldub_p(ptr
));
525 cpu_outw(port
, lduw_p(ptr
));
528 cpu_outl(port
, ldl_p(ptr
));
539 static void kvm_run_coalesced_mmio(CPUState
*env
, struct kvm_run
*run
)
541 #ifdef KVM_CAP_COALESCED_MMIO
542 KVMState
*s
= kvm_state
;
543 if (s
->coalesced_mmio
) {
544 struct kvm_coalesced_mmio_ring
*ring
;
546 ring
= (void *)run
+ (s
->coalesced_mmio
* TARGET_PAGE_SIZE
);
547 while (ring
->first
!= ring
->last
) {
548 struct kvm_coalesced_mmio
*ent
;
550 ent
= &ring
->coalesced_mmio
[ring
->first
];
552 cpu_physical_memory_write(ent
->phys_addr
, ent
->data
, ent
->len
);
553 /* FIXME smp_wmb() */
554 ring
->first
= (ring
->first
+ 1) % KVM_COALESCED_MMIO_MAX
;
560 void kvm_cpu_synchronize_state(CPUState
*env
)
562 if (!env
->kvm_state
->regs_modified
) {
563 kvm_arch_get_registers(env
);
564 env
->kvm_state
->regs_modified
= 1;
568 int kvm_cpu_exec(CPUState
*env
)
570 struct kvm_run
*run
= env
->kvm_run
;
573 dprintf("kvm_cpu_exec()\n");
576 if (env
->exit_request
) {
577 dprintf("interrupt exit requested\n");
582 if (env
->kvm_state
->regs_modified
) {
583 kvm_arch_put_registers(env
);
584 env
->kvm_state
->regs_modified
= 0;
587 kvm_arch_pre_run(env
, run
);
588 qemu_mutex_unlock_iothread();
589 ret
= kvm_vcpu_ioctl(env
, KVM_RUN
, 0);
590 qemu_mutex_lock_iothread();
591 kvm_arch_post_run(env
, run
);
593 if (ret
== -EINTR
|| ret
== -EAGAIN
) {
594 dprintf("io window exit\n");
600 dprintf("kvm run failed %s\n", strerror(-ret
));
604 kvm_run_coalesced_mmio(env
, run
);
606 ret
= 0; /* exit loop */
607 switch (run
->exit_reason
) {
609 dprintf("handle_io\n");
610 ret
= kvm_handle_io(run
->io
.port
,
611 (uint8_t *)run
+ run
->io
.data_offset
,
617 dprintf("handle_mmio\n");
618 cpu_physical_memory_rw(run
->mmio
.phys_addr
,
624 case KVM_EXIT_IRQ_WINDOW_OPEN
:
625 dprintf("irq_window_open\n");
627 case KVM_EXIT_SHUTDOWN
:
628 dprintf("shutdown\n");
629 qemu_system_reset_request();
632 case KVM_EXIT_UNKNOWN
:
633 dprintf("kvm_exit_unknown\n");
635 case KVM_EXIT_FAIL_ENTRY
:
636 dprintf("kvm_exit_fail_entry\n");
638 case KVM_EXIT_EXCEPTION
:
639 dprintf("kvm_exit_exception\n");
642 dprintf("kvm_exit_debug\n");
643 #ifdef KVM_CAP_SET_GUEST_DEBUG
644 if (kvm_arch_debug(&run
->debug
.arch
)) {
645 gdb_set_stop_cpu(env
);
647 env
->exception_index
= EXCP_DEBUG
;
650 /* re-enter, this exception was guest-internal */
652 #endif /* KVM_CAP_SET_GUEST_DEBUG */
655 dprintf("kvm_arch_handle_exit\n");
656 ret
= kvm_arch_handle_exit(env
, run
);
661 if (env
->exit_request
) {
662 env
->exit_request
= 0;
663 env
->exception_index
= EXCP_INTERRUPT
;
669 void kvm_set_phys_mem(target_phys_addr_t start_addr
,
671 ram_addr_t phys_offset
)
673 KVMState
*s
= kvm_state
;
674 ram_addr_t flags
= phys_offset
& ~TARGET_PAGE_MASK
;
678 if (start_addr
& ~TARGET_PAGE_MASK
) {
679 if (flags
>= IO_MEM_UNASSIGNED
) {
680 if (!kvm_lookup_overlapping_slot(s
, start_addr
,
681 start_addr
+ size
)) {
684 fprintf(stderr
, "Unaligned split of a KVM memory slot\n");
686 fprintf(stderr
, "Only page-aligned memory slots supported\n");
691 /* KVM does not support read-only slots */
692 phys_offset
&= ~IO_MEM_ROM
;
695 mem
= kvm_lookup_overlapping_slot(s
, start_addr
, start_addr
+ size
);
700 if (flags
< IO_MEM_UNASSIGNED
&& start_addr
>= mem
->start_addr
&&
701 (start_addr
+ size
<= mem
->start_addr
+ mem
->memory_size
) &&
702 (phys_offset
- start_addr
== mem
->phys_offset
- mem
->start_addr
)) {
703 /* The new slot fits into the existing one and comes with
704 * identical parameters - nothing to be done. */
710 /* unregister the overlapping slot */
711 mem
->memory_size
= 0;
712 err
= kvm_set_user_memory_region(s
, mem
);
714 fprintf(stderr
, "%s: error unregistering overlapping slot: %s\n",
715 __func__
, strerror(-err
));
719 /* Workaround for older KVM versions: we can't join slots, even not by
720 * unregistering the previous ones and then registering the larger
721 * slot. We have to maintain the existing fragmentation. Sigh.
723 * This workaround assumes that the new slot starts at the same
724 * address as the first existing one. If not or if some overlapping
725 * slot comes around later, we will fail (not seen in practice so far)
726 * - and actually require a recent KVM version. */
727 if (s
->broken_set_mem_region
&&
728 old
.start_addr
== start_addr
&& old
.memory_size
< size
&&
729 flags
< IO_MEM_UNASSIGNED
) {
730 mem
= kvm_alloc_slot(s
);
731 mem
->memory_size
= old
.memory_size
;
732 mem
->start_addr
= old
.start_addr
;
733 mem
->phys_offset
= old
.phys_offset
;
736 err
= kvm_set_user_memory_region(s
, mem
);
738 fprintf(stderr
, "%s: error updating slot: %s\n", __func__
,
743 start_addr
+= old
.memory_size
;
744 phys_offset
+= old
.memory_size
;
745 size
-= old
.memory_size
;
749 /* register prefix slot */
750 if (old
.start_addr
< start_addr
) {
751 mem
= kvm_alloc_slot(s
);
752 mem
->memory_size
= start_addr
- old
.start_addr
;
753 mem
->start_addr
= old
.start_addr
;
754 mem
->phys_offset
= old
.phys_offset
;
757 err
= kvm_set_user_memory_region(s
, mem
);
759 fprintf(stderr
, "%s: error registering prefix slot: %s\n",
760 __func__
, strerror(-err
));
765 /* register suffix slot */
766 if (old
.start_addr
+ old
.memory_size
> start_addr
+ size
) {
767 ram_addr_t size_delta
;
769 mem
= kvm_alloc_slot(s
);
770 mem
->start_addr
= start_addr
+ size
;
771 size_delta
= mem
->start_addr
- old
.start_addr
;
772 mem
->memory_size
= old
.memory_size
- size_delta
;
773 mem
->phys_offset
= old
.phys_offset
+ size_delta
;
776 err
= kvm_set_user_memory_region(s
, mem
);
778 fprintf(stderr
, "%s: error registering suffix slot: %s\n",
779 __func__
, strerror(-err
));
785 /* in case the KVM bug workaround already "consumed" the new slot */
789 /* KVM does not need to know about this memory */
790 if (flags
>= IO_MEM_UNASSIGNED
)
793 mem
= kvm_alloc_slot(s
);
794 mem
->memory_size
= size
;
795 mem
->start_addr
= start_addr
;
796 mem
->phys_offset
= phys_offset
;
799 err
= kvm_set_user_memory_region(s
, mem
);
801 fprintf(stderr
, "%s: error registering slot: %s\n", __func__
,
807 int kvm_ioctl(KVMState
*s
, int type
, ...)
814 arg
= va_arg(ap
, void *);
817 ret
= ioctl(s
->fd
, type
, arg
);
824 int kvm_vm_ioctl(KVMState
*s
, int type
, ...)
831 arg
= va_arg(ap
, void *);
834 ret
= ioctl(s
->vmfd
, type
, arg
);
841 int kvm_vcpu_ioctl(CPUState
*env
, int type
, ...)
848 arg
= va_arg(ap
, void *);
851 ret
= ioctl(env
->kvm_fd
, type
, arg
);
858 int kvm_has_sync_mmu(void)
860 #ifdef KVM_CAP_SYNC_MMU
861 KVMState
*s
= kvm_state
;
863 return kvm_check_extension(s
, KVM_CAP_SYNC_MMU
);
869 void kvm_setup_guest_memory(void *start
, size_t size
)
871 if (!kvm_has_sync_mmu()) {
873 int ret
= madvise(start
, size
, MADV_DONTFORK
);
881 "Need MADV_DONTFORK in absence of synchronous KVM MMU\n");
887 #ifdef KVM_CAP_SET_GUEST_DEBUG
888 static void on_vcpu(CPUState
*env
, void (*func
)(void *data
), void *data
)
890 #ifdef CONFIG_IOTHREAD
891 if (env
== cpu_single_env
) {
901 struct kvm_sw_breakpoint
*kvm_find_sw_breakpoint(CPUState
*env
,
904 struct kvm_sw_breakpoint
*bp
;
906 QTAILQ_FOREACH(bp
, &env
->kvm_state
->kvm_sw_breakpoints
, entry
) {
913 int kvm_sw_breakpoints_active(CPUState
*env
)
915 return !QTAILQ_EMPTY(&env
->kvm_state
->kvm_sw_breakpoints
);
918 struct kvm_set_guest_debug_data
{
919 struct kvm_guest_debug dbg
;
924 static void kvm_invoke_set_guest_debug(void *data
)
926 struct kvm_set_guest_debug_data
*dbg_data
= data
;
927 CPUState
*env
= dbg_data
->env
;
929 if (env
->kvm_state
->regs_modified
) {
930 kvm_arch_put_registers(env
);
931 env
->kvm_state
->regs_modified
= 0;
933 dbg_data
->err
= kvm_vcpu_ioctl(env
, KVM_SET_GUEST_DEBUG
, &dbg_data
->dbg
);
936 int kvm_update_guest_debug(CPUState
*env
, unsigned long reinject_trap
)
938 struct kvm_set_guest_debug_data data
;
940 data
.dbg
.control
= 0;
941 if (env
->singlestep_enabled
)
942 data
.dbg
.control
= KVM_GUESTDBG_ENABLE
| KVM_GUESTDBG_SINGLESTEP
;
944 kvm_arch_update_guest_debug(env
, &data
.dbg
);
945 data
.dbg
.control
|= reinject_trap
;
948 on_vcpu(env
, kvm_invoke_set_guest_debug
, &data
);
952 int kvm_insert_breakpoint(CPUState
*current_env
, target_ulong addr
,
953 target_ulong len
, int type
)
955 struct kvm_sw_breakpoint
*bp
;
959 if (type
== GDB_BREAKPOINT_SW
) {
960 bp
= kvm_find_sw_breakpoint(current_env
, addr
);
966 bp
= qemu_malloc(sizeof(struct kvm_sw_breakpoint
));
972 err
= kvm_arch_insert_sw_breakpoint(current_env
, bp
);
978 QTAILQ_INSERT_HEAD(¤t_env
->kvm_state
->kvm_sw_breakpoints
,
981 err
= kvm_arch_insert_hw_breakpoint(addr
, len
, type
);
986 for (env
= first_cpu
; env
!= NULL
; env
= env
->next_cpu
) {
987 err
= kvm_update_guest_debug(env
, 0);
994 int kvm_remove_breakpoint(CPUState
*current_env
, target_ulong addr
,
995 target_ulong len
, int type
)
997 struct kvm_sw_breakpoint
*bp
;
1001 if (type
== GDB_BREAKPOINT_SW
) {
1002 bp
= kvm_find_sw_breakpoint(current_env
, addr
);
1006 if (bp
->use_count
> 1) {
1011 err
= kvm_arch_remove_sw_breakpoint(current_env
, bp
);
1015 QTAILQ_REMOVE(¤t_env
->kvm_state
->kvm_sw_breakpoints
, bp
, entry
);
1018 err
= kvm_arch_remove_hw_breakpoint(addr
, len
, type
);
1023 for (env
= first_cpu
; env
!= NULL
; env
= env
->next_cpu
) {
1024 err
= kvm_update_guest_debug(env
, 0);
1031 void kvm_remove_all_breakpoints(CPUState
*current_env
)
1033 struct kvm_sw_breakpoint
*bp
, *next
;
1034 KVMState
*s
= current_env
->kvm_state
;
1037 QTAILQ_FOREACH_SAFE(bp
, &s
->kvm_sw_breakpoints
, entry
, next
) {
1038 if (kvm_arch_remove_sw_breakpoint(current_env
, bp
) != 0) {
1039 /* Try harder to find a CPU that currently sees the breakpoint. */
1040 for (env
= first_cpu
; env
!= NULL
; env
= env
->next_cpu
) {
1041 if (kvm_arch_remove_sw_breakpoint(env
, bp
) == 0)
1046 kvm_arch_remove_all_hw_breakpoints();
1048 for (env
= first_cpu
; env
!= NULL
; env
= env
->next_cpu
)
1049 kvm_update_guest_debug(env
, 0);
1052 #else /* !KVM_CAP_SET_GUEST_DEBUG */
1054 int kvm_update_guest_debug(CPUState
*env
, unsigned long reinject_trap
)
1059 int kvm_insert_breakpoint(CPUState
*current_env
, target_ulong addr
,
1060 target_ulong len
, int type
)
1065 int kvm_remove_breakpoint(CPUState
*current_env
, target_ulong addr
,
1066 target_ulong len
, int type
)
1071 void kvm_remove_all_breakpoints(CPUState
*current_env
)
1074 #endif /* !KVM_CAP_SET_GUEST_DEBUG */