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| author | Marc Zyngier <maz@kernel.org> | 2026-04-01 13:36:04 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2026-04-01 17:42:26 +0300 |
| commit | a4a645584793dbbb4e5a1a876800654a8883326e (patch) | |
| tree | 13f648510a96108fcf6dd76b60588757147612a0 | |
| parent | 42d7eac8291d2724b3897141ab2f226c69b7923e (diff) | |
| download | linux-a4a645584793dbbb4e5a1a876800654a8883326e.tar.xz | |
KVM: arm64: vgic-v5: Make the effective priority mask a strict limit
The way the effective priority mask is compared to the priority of
an interrupt to decide whether to wake-up or not, is slightly odd,
and breaks at the limits.
This could result in spurious wake-ups that are undesirable.
Make the computed priority mask comparison a strict inequality, so
that interrupts that have the same priority as the mask are not
signalled.
Fixes: 933e5288fa971 ("KVM: arm64: gic-v5: Check for pending PPIs")
Link: https://sashiko.dev/#/patchset/20260319154937.3619520-1-sascha.bischoff%40arm.com
Link: https://patch.msgid.link/20260401103611.357092-10-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
| -rw-r--r-- | arch/arm64/kvm/vgic/vgic-v5.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/kvm/vgic/vgic-v5.c b/arch/arm64/kvm/vgic/vgic-v5.c index 0f269321ece4..31040cfb61fc 100644 --- a/arch/arm64/kvm/vgic/vgic-v5.c +++ b/arch/arm64/kvm/vgic/vgic-v5.c @@ -367,7 +367,7 @@ bool vgic_v5_has_pending_ppi(struct kvm_vcpu *vcpu) scoped_guard(raw_spinlock_irqsave, &irq->irq_lock) has_pending = (irq->enabled && irq_is_pending(irq) && - irq->priority <= priority_mask); + irq->priority < priority_mask); vgic_put_irq(vcpu->kvm, irq); |