#include "qemu-common.h"
#include "sysemu.h"
+#include "gdbstub.h"
#include "kvm.h"
/* KVM uses PAGE_SIZE in it's definition of COALESCED_MMIO_MAX */
int fd;
int vmfd;
int coalesced_mmio;
+#ifdef KVM_CAP_SET_GUEST_DEBUG
+ struct kvm_sw_breakpoint_head kvm_sw_breakpoints;
+#endif
};
static KVMState *kvm_state;
alloc_size = mem->memory_size >> TARGET_PAGE_BITS / sizeof(d.dirty_bitmap);
d.dirty_bitmap = qemu_mallocz(alloc_size);
- if (d.dirty_bitmap == NULL) {
- dprintf("Could not allocate dirty bitmap\n");
- return;
- }
-
d.slot = mem->slot;
dprintf("slot %d, phys_addr %llx, uaddr: %llx\n",
d.slot, mem->start_addr, mem->phys_offset);
return -EINVAL;
s = qemu_mallocz(sizeof(KVMState));
- if (s == NULL)
- return -ENOMEM;
+#ifdef KVM_CAP_SET_GUEST_DEBUG
+ TAILQ_INIT(&s->kvm_sw_breakpoints);
+#endif
for (i = 0; i < ARRAY_SIZE(s->slots); i++)
s->slots[i].slot = i;
do {
kvm_arch_pre_run(env, run);
- if ((env->interrupt_request & CPU_INTERRUPT_EXIT)) {
+ if (env->exit_request) {
dprintf("interrupt exit requested\n");
ret = 0;
break;
break;
case KVM_EXIT_DEBUG:
dprintf("kvm_exit_debug\n");
+#ifdef KVM_CAP_SET_GUEST_DEBUG
+ if (kvm_arch_debug(&run->debug.arch)) {
+ gdb_set_stop_cpu(env);
+ vm_stop(EXCP_DEBUG);
+ env->exception_index = EXCP_DEBUG;
+ return 0;
+ }
+ /* re-enter, this exception was guest-internal */
+ ret = 1;
+#endif /* KVM_CAP_SET_GUEST_DEBUG */
break;
default:
dprintf("kvm_arch_handle_exit\n");
}
} while (ret > 0);
- if ((env->interrupt_request & CPU_INTERRUPT_EXIT)) {
- env->interrupt_request &= ~CPU_INTERRUPT_EXIT;
+ if (env->exit_request) {
+ env->exit_request = 0;
env->exception_index = EXCP_INTERRUPT;
}
int kvm_has_sync_mmu(void)
{
+#ifdef KVM_CAP_SYNC_MMU
KVMState *s = kvm_state;
-#ifdef KVM_CAP_SYNC_MMU
if (kvm_ioctl(s, KVM_CHECK_EXTENSION, KVM_CAP_SYNC_MMU) > 0)
return 1;
#endif
return 0;
}
+
+#ifdef KVM_CAP_SET_GUEST_DEBUG
+struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env,
+ target_ulong pc)
+{
+ struct kvm_sw_breakpoint *bp;
+
+ TAILQ_FOREACH(bp, &env->kvm_state->kvm_sw_breakpoints, entry) {
+ if (bp->pc == pc)
+ return bp;
+ }
+ return NULL;
+}
+
+int kvm_sw_breakpoints_active(CPUState *env)
+{
+ return !TAILQ_EMPTY(&env->kvm_state->kvm_sw_breakpoints);
+}
+
+int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap)
+{
+ struct kvm_guest_debug dbg;
+
+ dbg.control = 0;
+ if (env->singlestep_enabled)
+ dbg.control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP;
+
+ kvm_arch_update_guest_debug(env, &dbg);
+ dbg.control |= reinject_trap;
+
+ return kvm_vcpu_ioctl(env, KVM_SET_GUEST_DEBUG, &dbg);
+}
+
+int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
+ target_ulong len, int type)
+{
+ struct kvm_sw_breakpoint *bp;
+ CPUState *env;
+ int err;
+
+ if (type == GDB_BREAKPOINT_SW) {
+ bp = kvm_find_sw_breakpoint(current_env, addr);
+ if (bp) {
+ bp->use_count++;
+ return 0;
+ }
+
+ bp = qemu_malloc(sizeof(struct kvm_sw_breakpoint));
+ if (!bp)
+ return -ENOMEM;
+
+ bp->pc = addr;
+ bp->use_count = 1;
+ err = kvm_arch_insert_sw_breakpoint(current_env, bp);
+ if (err) {
+ free(bp);
+ return err;
+ }
+
+ TAILQ_INSERT_HEAD(¤t_env->kvm_state->kvm_sw_breakpoints,
+ bp, entry);
+ } else {
+ err = kvm_arch_insert_hw_breakpoint(addr, len, type);
+ if (err)
+ return err;
+ }
+
+ for (env = first_cpu; env != NULL; env = env->next_cpu) {
+ err = kvm_update_guest_debug(env, 0);
+ if (err)
+ return err;
+ }
+ return 0;
+}
+
+int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
+ target_ulong len, int type)
+{
+ struct kvm_sw_breakpoint *bp;
+ CPUState *env;
+ int err;
+
+ if (type == GDB_BREAKPOINT_SW) {
+ bp = kvm_find_sw_breakpoint(current_env, addr);
+ if (!bp)
+ return -ENOENT;
+
+ if (bp->use_count > 1) {
+ bp->use_count--;
+ return 0;
+ }
+
+ err = kvm_arch_remove_sw_breakpoint(current_env, bp);
+ if (err)
+ return err;
+
+ TAILQ_REMOVE(¤t_env->kvm_state->kvm_sw_breakpoints, bp, entry);
+ qemu_free(bp);
+ } else {
+ err = kvm_arch_remove_hw_breakpoint(addr, len, type);
+ if (err)
+ return err;
+ }
+
+ for (env = first_cpu; env != NULL; env = env->next_cpu) {
+ err = kvm_update_guest_debug(env, 0);
+ if (err)
+ return err;
+ }
+ return 0;
+}
+
+void kvm_remove_all_breakpoints(CPUState *current_env)
+{
+ struct kvm_sw_breakpoint *bp, *next;
+ KVMState *s = current_env->kvm_state;
+ CPUState *env;
+
+ TAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) {
+ if (kvm_arch_remove_sw_breakpoint(current_env, bp) != 0) {
+ /* Try harder to find a CPU that currently sees the breakpoint. */
+ for (env = first_cpu; env != NULL; env = env->next_cpu) {
+ if (kvm_arch_remove_sw_breakpoint(env, bp) == 0)
+ break;
+ }
+ }
+ }
+ kvm_arch_remove_all_hw_breakpoints();
+
+ for (env = first_cpu; env != NULL; env = env->next_cpu)
+ kvm_update_guest_debug(env, 0);
+}
+
+#else /* !KVM_CAP_SET_GUEST_DEBUG */
+
+int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap)
+{
+ return -EINVAL;
+}
+
+int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
+ target_ulong len, int type)
+{
+ return -EINVAL;
+}
+
+int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
+ target_ulong len, int type)
+{
+ return -EINVAL;
+}
+
+void kvm_remove_all_breakpoints(CPUState *current_env)
+{
+}
+#endif /* !KVM_CAP_SET_GUEST_DEBUG */
projects / qemu / blobdiff