@@ -2524,10 +2524,6 @@ static int kvm_init(MachineState *ms)
#ifdef KVM_CAP_VCPU_EVENTS
s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS);
#endif
-
- s->robust_singlestep =
- kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP);
-
s->max_nested_state_len = kvm_check_extension(s, KVM_CAP_NESTED_STATE);
s->irq_set_ioctl = KVM_IRQ_LINE;
@@ -3143,11 +3139,6 @@ int kvm_has_vcpu_events(void)
return kvm_state->vcpu_events;
}
-int kvm_has_robust_singlestep(void)
-{
- return kvm_state->robust_singlestep;
-}
-
int kvm_max_nested_state_length(void)
{
return kvm_state->max_nested_state_len;
@@ -192,7 +192,6 @@ unsigned int kvm_get_max_memslots(void);
unsigned int kvm_get_free_memslots(void);
bool kvm_has_sync_mmu(void);
int kvm_has_vcpu_events(void);
-int kvm_has_robust_singlestep(void);
int kvm_max_nested_state_length(void);
int kvm_has_gsi_routing(void);
@@ -78,7 +78,6 @@ struct KVMState
struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
bool coalesced_flush_in_progress;
int vcpu_events;
- int robust_singlestep;
#ifdef KVM_CAP_SET_GUEST_DEBUG
QTAILQ_HEAD(, kvm_sw_breakpoint) kvm_sw_breakpoints;
#endif
@@ -95,6 +95,8 @@ const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
KVM_CAP_INFO(IRQ_ROUTING),
KVM_CAP_INFO(DEBUGREGS),
KVM_CAP_INFO(XSAVE),
+ KVM_CAP_INFO(VCPU_EVENTS),
+ KVM_CAP_INFO(X86_ROBUST_SINGLESTEP),
KVM_CAP_LAST_INFO
};
@@ -690,15 +692,6 @@ void kvm_arch_on_sigbus_vcpu(CPUState *c, int code, void *addr)
emit_hypervisor_memory_failure(MEMORY_FAILURE_ACTION_IGNORE, false);
}
-static void kvm_reset_exception(CPUX86State *env)
-{
- env->exception_nr = -1;
- env->exception_pending = 0;
- env->exception_injected = 0;
- env->exception_has_payload = false;
- env->exception_payload = 0;
-}
-
static void kvm_queue_exception(CPUX86State *env,
int32_t exception_nr,
uint8_t exception_has_payload,
@@ -731,38 +724,6 @@ static void kvm_queue_exception(CPUX86State *env,
}
}
-static int kvm_inject_mce_oldstyle(X86CPU *cpu)
-{
- CPUX86State *env = &cpu->env;
-
- if (!kvm_has_vcpu_events() && env->exception_nr == EXCP12_MCHK) {
- unsigned int bank, bank_num = env->mcg_cap & 0xff;
- struct kvm_x86_mce mce;
-
- kvm_reset_exception(env);
-
- /*
- * There must be at least one bank in use if an MCE is pending.
- * Find it and use its values for the event injection.
- */
- for (bank = 0; bank < bank_num; bank++) {
- if (env->mce_banks[bank * 4 + 1] & MCI_STATUS_VAL) {
- break;
- }
- }
- assert(bank < bank_num);
-
- mce.bank = bank;
- mce.status = env->mce_banks[bank * 4 + 1];
- mce.mcg_status = env->mcg_status;
- mce.addr = env->mce_banks[bank * 4 + 2];
- mce.misc = env->mce_banks[bank * 4 + 3];
-
- return kvm_vcpu_ioctl(CPU(cpu), KVM_X86_SET_MCE, &mce);
- }
- return 0;
-}
-
static void cpu_update_state(void *opaque, bool running, RunState state)
{
CPUX86State *env = opaque;
@@ -4359,10 +4320,6 @@ static int kvm_put_vcpu_events(X86CPU *cpu, int level)
CPUX86State *env = &cpu->env;
struct kvm_vcpu_events events = {};
- if (!kvm_has_vcpu_events()) {
- return 0;
- }
-
events.flags = 0;
if (has_exception_payload) {
@@ -4430,10 +4387,6 @@ static int kvm_get_vcpu_events(X86CPU *cpu)
struct kvm_vcpu_events events;
int ret;
- if (!kvm_has_vcpu_events()) {
- return 0;
- }
-
memset(&events, 0, sizeof(events));
ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_VCPU_EVENTS, &events);
if (ret < 0) {
@@ -4499,37 +4452,6 @@ static int kvm_get_vcpu_events(X86CPU *cpu)
return 0;
}
-static int kvm_guest_debug_workarounds(X86CPU *cpu)
-{
- CPUState *cs = CPU(cpu);
- CPUX86State *env = &cpu->env;
- int ret = 0;
- unsigned long reinject_trap = 0;
-
- if (!kvm_has_vcpu_events()) {
- if (env->exception_nr == EXCP01_DB) {
- reinject_trap = KVM_GUESTDBG_INJECT_DB;
- } else if (env->exception_injected == EXCP03_INT3) {
- reinject_trap = KVM_GUESTDBG_INJECT_BP;
- }
- kvm_reset_exception(env);
- }
-
- /*
- * Kernels before KVM_CAP_X86_ROBUST_SINGLESTEP overwrote flags.TF
- * injected via SET_GUEST_DEBUG while updating GP regs. Work around this
- * by updating the debug state once again if single-stepping is on.
- * Another reason to call kvm_update_guest_debug here is a pending debug
- * trap raise by the guest. On kernels without SET_VCPU_EVENTS we have to
- * reinject them via SET_GUEST_DEBUG.
- */
- if (reinject_trap ||
- (!kvm_has_robust_singlestep() && cs->singlestep_enabled)) {
- ret = kvm_update_guest_debug(cs, reinject_trap);
- }
- return ret;
-}
-
static int kvm_put_debugregs(X86CPU *cpu)
{
CPUX86State *env = &cpu->env;
@@ -4702,11 +4624,6 @@ int kvm_arch_put_registers(CPUState *cpu, int level)
if (ret < 0) {
return ret;
}
- /* must be before kvm_put_msrs */
- ret = kvm_inject_mce_oldstyle(x86_cpu);
- if (ret < 0) {
- return ret;
- }
ret = kvm_put_msrs(x86_cpu, level);
if (ret < 0) {
return ret;
@@ -4730,11 +4647,6 @@ int kvm_arch_put_registers(CPUState *cpu, int level)
if (ret < 0) {
return ret;
}
- /* must be last */
- ret = kvm_guest_debug_workarounds(x86_cpu);
- if (ret < 0) {
- return ret;
- }
return 0;
}
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> --- accel/kvm/kvm-all.c | 9 ---- include/sysemu/kvm.h | 1 - include/sysemu/kvm_int.h | 1 - target/i386/kvm/kvm.c | 92 +--------------------------------------- 4 files changed, 2 insertions(+), 101 deletions(-)