diff options
| author | Marc Zyngier <[email protected]> | 2017-05-02 14:30:39 +0100 |
|---|---|---|
| committer | Christoffer Dall <[email protected]> | 2017-05-15 11:31:43 +0200 |
| commit | ddf42d068f8802de122bb7efdfcb3179336053f1 (patch) | |
| tree | 3b9667a892f676fb3cd552749dd7e9beb4ee8092 | |
| parent | 501ad27c67ed0b90df465f23d33e9aed64058a47 (diff) | |
KVM: arm/arm64: vgic-v2: Do not use Active+Pending state for a HW interrupt
When an interrupt is injected with the HW bit set (indicating that
deactivation should be propagated to the physical distributor),
special care must be taken so that we never mark the corresponding
LR with the Active+Pending state (as the pending state is kept in
the physycal distributor).
Cc: [email protected]
Fixes: 140b086dd197 ("KVM: arm/arm64: vgic-new: Add GICv2 world switch backend")
Signed-off-by: Marc Zyngier <[email protected]>
Reviewed-by: Christoffer Dall <[email protected]>
Signed-off-by: Christoffer Dall <[email protected]>
| -rw-r--r-- | virt/kvm/arm/vgic/vgic-v2.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/virt/kvm/arm/vgic/vgic-v2.c b/virt/kvm/arm/vgic/vgic-v2.c index a65757aab6d3..504b4bd0d651 100644 --- a/virt/kvm/arm/vgic/vgic-v2.c +++ b/virt/kvm/arm/vgic/vgic-v2.c @@ -149,6 +149,13 @@ void vgic_v2_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr) if (irq->hw) { val |= GICH_LR_HW; val |= irq->hwintid << GICH_LR_PHYSID_CPUID_SHIFT; + /* + * Never set pending+active on a HW interrupt, as the + * pending state is kept at the physical distributor + * level. + */ + if (irq->active && irq_is_pending(irq)) + val &= ~GICH_LR_PENDING_BIT; } else { if (irq->config == VGIC_CONFIG_LEVEL) val |= GICH_LR_EOI; |