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KVM: arm64: pmu: Kill the PMU interrupt level cache

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Just like the timer, the PMU has an interrupt cache that serves little
purpose. Drop it.

Reviewed-by: Oliver Upton <oupton@kernel.org>
Link: https://patch.msgid.link/20260520100200.543845-5-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier 2026-05-20 11:01:58 +01:00
parent ac70020318
commit 2772383afc
2 changed files with 3 additions and 11 deletions
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13
arch/arm64/kvm/pmu-emul.c
View File

@ -396,19 +396,12 @@ static bool kvm_pmu_overflow_status(struct kvm_vcpu *vcpu)
static void kvm_pmu_update_state(struct kvm_vcpu *vcpu)
{
struct kvm_pmu *pmu = &vcpu->arch.pmu;
bool overflow;
overflow = kvm_pmu_overflow_status(vcpu);
if (pmu->irq_level == overflow)
if (unlikely(!irqchip_in_kernel(vcpu->kvm)))
return;
pmu->irq_level = overflow;
if (likely(irqchip_in_kernel(vcpu->kvm))) {
int ret = kvm_vgic_inject_irq(vcpu->kvm, vcpu,
pmu->irq_num, overflow, pmu);
WARN_ON(ret);
}
WARN_ON(kvm_vgic_inject_irq(vcpu->kvm, vcpu, pmu->irq_num,
kvm_pmu_overflow_status(vcpu), pmu));
}
bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu)

1
include/kvm/arm_pmu.h
View File

@ -32,7 +32,6 @@ struct kvm_pmu {
struct kvm_pmc pmc[KVM_ARMV8_PMU_MAX_COUNTERS];
int irq_num;
bool created;
bool irq_level;
};
struct arm_pmu_entry {