diff options
Diffstat (limited to 'arch/arm64/kvm/vgic/vgic-v2.c')
| -rw-r--r-- | arch/arm64/kvm/vgic/vgic-v2.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/arch/arm64/kvm/vgic/vgic-v2.c b/arch/arm64/kvm/vgic/vgic-v2.c index 11934c2af2f4..2c580204f1dc 100644 --- a/arch/arm64/kvm/vgic/vgic-v2.c +++ b/arch/arm64/kvm/vgic/vgic-v2.c @@ -108,11 +108,22 @@ void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu) * If this causes us to lower the level, we have to also clear * the physical active state, since we will otherwise never be * told when the interrupt becomes asserted again. + * + * Another case is when the interrupt requires a helping hand + * on deactivation (no HW deactivation, for example). */ - if (vgic_irq_is_mapped_level(irq) && (val & GICH_LR_PENDING_BIT)) { - irq->line_level = vgic_get_phys_line_level(irq); + if (vgic_irq_is_mapped_level(irq)) { + bool resample = false; + + if (val & GICH_LR_PENDING_BIT) { + irq->line_level = vgic_get_phys_line_level(irq); + resample = !irq->line_level; + } else if (vgic_irq_needs_resampling(irq) && + !(irq->active || irq->pending_latch)) { + resample = true; + } - if (!irq->line_level) + if (resample) vgic_irq_set_phys_active(irq, false); } @@ -152,7 +163,7 @@ void vgic_v2_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr) if (irq->group) val |= GICH_LR_GROUP1; - if (irq->hw) { + if (irq->hw && !vgic_irq_needs_resampling(irq)) { val |= GICH_LR_HW; val |= irq->hwintid << GICH_LR_PHYSID_CPUID_SHIFT; /* |