From: Jim Mattson <jmattson@google.com>
To: kvm@vger.kernel.org, pbonzini@redhat.com
Cc: Jim Mattson <jmattson@google.com>
Subject: [PATCH v2 04/12] KVM: x86: Add a return code to inject_pending_event
Date: Fri, 4 Jun 2021 10:26:03 -0700 [thread overview]
Message-ID: <20210604172611.281819-5-jmattson@google.com> (raw)
In-Reply-To: <20210604172611.281819-1-jmattson@google.com>
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>
---
arch/x86/kvm/x86.c | 27 +++++++++++++++++----------
1 file changed, 17 insertions(+), 10 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 83bc0a5b1aab..f9b3ea916344 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8550,7 +8550,7 @@ 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;
@@ -8597,7 +8597,7 @@ 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 */
@@ -8639,7 +8639,7 @@ 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;
@@ -8652,7 +8652,7 @@ 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;
@@ -8667,7 +8667,7 @@ 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);
@@ -8683,11 +8683,14 @@ 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)
@@ -9248,7 +9251,11 @@ 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);
--
2.32.0.rc1.229.g3e70b5a671-goog
next prev parent reply other threads:[~2021-06-04 17:27 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-04 17:25 [PATCH v2 00/12] KVM: nVMX: Fix vmcs02 PID use-after-free issue Jim Mattson
2021-06-04 17:26 ` [PATCH v2 01/12] KVM: x86: Remove guest mode check from kvm_check_nested_events Jim Mattson
2021-06-04 17:26 ` [PATCH v2 02/12] KVM: x86: Wake up a vCPU when kvm_check_nested_events fails Jim Mattson
2021-06-04 17:26 ` [PATCH v2 03/12] KVM: nVMX: Add a return code to vmx_complete_nested_posted_interrupt Jim Mattson
2021-06-04 17:26 ` Jim Mattson [this message]
2021-06-04 17:26 ` [PATCH v2 05/12] KVM: x86: Add a return code to kvm_apic_accept_events Jim Mattson
2021-06-04 17:26 ` [PATCH v2 06/12] KVM: nVMX: Fail on MMIO completion for nested posted interrupts Jim Mattson
2021-06-04 17:26 ` [PATCH v2 07/12] KVM: nVMX: Disable vmcs02 posted interrupts if vmcs12 PID isn't mappable Jim Mattson
2021-06-04 17:26 ` [PATCH v2 08/12] KVM: selftests: Move APIC definitions into a separate file Jim Mattson
2021-06-04 17:26 ` [PATCH v2 09/12] KVM: selftests: Hoist APIC functions out of individual tests Jim Mattson
2021-06-04 17:26 ` [PATCH v2 10/12] KVM: selftests: Introduce x2APIC register manipulation functions Jim Mattson
2021-06-04 17:26 ` [PATCH v2 11/12] KVM: selftests: Introduce prepare_tpr_shadow Jim Mattson
2021-06-04 17:26 ` [PATCH v2 12/12] KVM: selftests: Add a test of an unbacked nested PI descriptor Jim Mattson
2021-06-10 11:55 ` [PATCH v2 00/12] KVM: nVMX: Fix vmcs02 PID use-after-free issue Paolo Bonzini
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