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LoongArch: KVM: Check msgint feature in interrupt post

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Interrupt AVEC is valid only if VM has msgint feature, and this feature
is checked in interrupt handling. Since interrupt handling is executing
in VM context switch, and it is hot path, here move the feature checking
in interrupt post rather than interrupt handling.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Bibo Mao 2026-06-11 20:46:41 +08:00 committed by Huacai Chen
parent 09b318ab77
commit 33c6da26d8
2 changed files with 3 additions and 5 deletions
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5
arch/loongarch/kvm/interrupt.c
View File

@ -36,8 +36,6 @@ static int kvm_irq_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
switch (priority) {
case INT_AVEC:
if (!kvm_guest_has_msgint(&vcpu->arch))
break;
dmsintc_inject_irq(vcpu);
fallthrough;
case INT_TI:
@ -75,9 +73,6 @@ static int kvm_irq_clear(struct kvm_vcpu *vcpu, unsigned int priority)
switch (priority) {
case INT_AVEC:
if (!kvm_guest_has_msgint(&vcpu->arch))
break;
fallthrough;
case INT_TI:
case INT_IPI:
case INT_SWI0:

3
arch/loongarch/kvm/vcpu.c
View File

@ -1457,6 +1457,9 @@ int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
if (vector >= EXCCODE_INT_NUM)
return -EINVAL;
if (!kvm_guest_has_msgint(&vcpu->arch) && (vector == INT_AVEC))
return -EINVAL;
if (intr > 0)
kvm_queue_irq(vcpu, intr);
else if (intr < 0)