From 146a050f2d8c4394dfe3e236dc49d155fd5c04d1 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Tue, 25 Feb 2025 17:29:22 +0000 Subject: KVM: arm64: nv: Nested GICv3 emulation When entering a nested VM, we set up the hypervisor control interface based on what the guest hypervisor has set. Especially, we investigate each list register written by the guest hypervisor whether HW bit is set. If so, we translate hw irq number from the guest's point of view to the real hardware irq number if there is a mapping. Co-developed-by: Jintack Lim Signed-off-by: Jintack Lim [Christoffer: Redesigned execution flow around vcpu load/put] Co-developed-by: Christoffer Dall Signed-off-by: Christoffer Dall [maz: Rewritten to support GICv3 instead of GICv2, NV2 support] Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20250225172930.1850838-9-maz@kernel.org Signed-off-by: Oliver Upton --- include/kvm/arm_vgic.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/kvm') diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index 5017fcc71e60..1b373cb870fe 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -437,6 +437,8 @@ int vgic_v4_load(struct kvm_vcpu *vcpu); void vgic_v4_commit(struct kvm_vcpu *vcpu); int vgic_v4_put(struct kvm_vcpu *vcpu); +bool vgic_state_is_nested(struct kvm_vcpu *vcpu); + /* CPU HP callbacks */ void kvm_vgic_cpu_up(void); void kvm_vgic_cpu_down(void); -- cgit v1.2.3