[PATCH v7 25/41] KVM: arm64: Introduce set_direct_injection irq_op
From: Sascha Bischoff <hidden>
Date: 2026-03-19 15:57:29
Also in:
kvm, kvmarm
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
GICv5 adds support for directly injected PPIs. The mechanism for setting this up is GICv5 specific, so rather than adding GICv5-specific code to the common vgic code, we introduce a new irq_op. This new irq_op is intended to be used to enable or disable direct injection for interrupts that support it. As it is an irq_op, it has no effect unless explicitly populated in the irq_ops structure for a particular interrupt. The usage is demonstracted in the subsequent change. Signed-off-by: Sascha Bischoff <redacted> --- arch/arm64/kvm/vgic/vgic.c | 7 +++++++ include/kvm/arm_vgic.h | 7 +++++++ 2 files changed, 14 insertions(+)
diff --git a/arch/arm64/kvm/vgic/vgic.c b/arch/arm64/kvm/vgic/vgic.c
index d9ca5509147a9..9ac0ff60aa8a5 100644
--- a/arch/arm64/kvm/vgic/vgic.c
+++ b/arch/arm64/kvm/vgic/vgic.c@@ -608,12 +608,19 @@ static int kvm_vgic_map_irq(struct kvm_vcpu *vcpu, struct vgic_irq *irq, irq->hw = true; irq->host_irq = host_irq; irq->hwintid = data->hwirq; + + if (irq->ops && irq->ops->set_direct_injection) + irq->ops->set_direct_injection(vcpu, irq, true); + return 0; } /* @irq->irq_lock must be held */ static inline void kvm_vgic_unmap_irq(struct vgic_irq *irq) { + if (irq->ops && irq->ops->set_direct_injection) + irq->ops->set_direct_injection(irq->target_vcpu, irq, false); + irq->hw = false; irq->hwintid = 0; }
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index e9797c5dbbf0c..a28cf765f3eb5 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h@@ -215,6 +215,13 @@ struct irq_ops { */ bool (*queue_irq_unlock)(struct kvm *kvm, struct vgic_irq *irq, unsigned long flags) __releases(&irq->irq_lock); + + /* + * Callback function pointer to either enable or disable direct + * injection for a mapped interrupt. + */ + void (*set_direct_injection)(struct kvm_vcpu *vcpu, + struct vgic_irq *irq, bool direct); }; struct vgic_irq {
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2.34.1