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KVM: x86: Add a return code to inject_pending_event

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No functional change intended. At present, 'r' will always be -EBUSY
on a control transfer to the 'out' label.

Signed-off-by: Jim Mattson <jmattson@google.com>
Message-Id: <20210604172611.281819-5-jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Jim Mattson 2021-06-04 10:26:03 -07:00 committed by Paolo Bonzini
parent 650293c3de
commit a5f6909a71
1 changed files with 17 additions and 10 deletions
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27
arch/x86/kvm/x86.c
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@ -8640,7 +8640,7 @@ static void kvm_inject_exception(struct kvm_vcpu *vcpu)
static_call(kvm_x86_queue_exception)(vcpu);
}
static void inject_pending_event(struct kvm_vcpu *vcpu, bool *req_immediate_exit)
static int inject_pending_event(struct kvm_vcpu *vcpu, bool *req_immediate_exit)
{
int r;
bool can_inject = true;
@ -8687,7 +8687,7 @@ static void inject_pending_event(struct kvm_vcpu *vcpu, bool *req_immediate_exit
if (is_guest_mode(vcpu)) {
r = kvm_check_nested_events(vcpu);
if (r < 0)
goto busy;
goto out;
}
/* try to inject new event if pending */
@ -8729,7 +8729,7 @@ static void inject_pending_event(struct kvm_vcpu *vcpu, bool *req_immediate_exit
if (vcpu->arch.smi_pending) {
r = can_inject ? static_call(kvm_x86_smi_allowed)(vcpu, true) : -EBUSY;
if (r < 0)
goto busy;
goto out;
if (r) {
vcpu->arch.smi_pending = false;
++vcpu->arch.smi_count;
@ -8742,7 +8742,7 @@ static void inject_pending_event(struct kvm_vcpu *vcpu, bool *req_immediate_exit
if (vcpu->arch.nmi_pending) {
r = can_inject ? static_call(kvm_x86_nmi_allowed)(vcpu, true) : -EBUSY;
if (r < 0)
goto busy;
goto out;
if (r) {
--vcpu->arch.nmi_pending;
vcpu->arch.nmi_injected = true;
@ -8757,7 +8757,7 @@ static void inject_pending_event(struct kvm_vcpu *vcpu, bool *req_immediate_exit
if (kvm_cpu_has_injectable_intr(vcpu)) {
r = can_inject ? static_call(kvm_x86_interrupt_allowed)(vcpu, true) : -EBUSY;
if (r < 0)
goto busy;
goto out;
if (r) {
kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), false);
static_call(kvm_x86_set_irq)(vcpu);
@ -8773,11 +8773,14 @@ static void inject_pending_event(struct kvm_vcpu *vcpu, bool *req_immediate_exit
*req_immediate_exit = true;
WARN_ON(vcpu->arch.exception.pending);
return;
return 0;
busy:
*req_immediate_exit = true;
return;
out:
if (r == -EBUSY) {
*req_immediate_exit = true;
r = 0;
}
return r;
}
static void process_nmi(struct kvm_vcpu *vcpu)
@ -9338,7 +9341,11 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
goto out;
}
inject_pending_event(vcpu, &req_immediate_exit);
r = inject_pending_event(vcpu, &req_immediate_exit);
if (r < 0) {
r = 0;
goto out;
}
if (req_int_win)
static_call(kvm_x86_enable_irq_window)(vcpu);