From 0fc9a58ee45532e7a298c7aa626b3fe5ff8cdf87 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Fri, 27 Oct 2017 15:28:42 +0100 Subject: KVM: arm/arm64: GICv4: Propagate affinity changes to the physical ITS When the guest issues an affinity change, we need to tell the physical ITS that we're now targetting a new vcpu. This is done by extracting the current mapping, updating the target, and reapplying the mapping. Reviewed-by: Christoffer Dall Signed-off-by: Marc Zyngier Signed-off-by: Christoffer Dall --- virt/kvm/arm/vgic/vgic-its.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) (limited to 'virt') diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c index ad14af8a4412..80bea7021e2e 100644 --- a/virt/kvm/arm/vgic/vgic-its.c +++ b/virt/kvm/arm/vgic/vgic-its.c @@ -338,11 +338,25 @@ static int vgic_copy_lpi_list(struct kvm_vcpu *vcpu, u32 **intid_ptr) static int update_affinity(struct vgic_irq *irq, struct kvm_vcpu *vcpu) { + int ret = 0; + spin_lock(&irq->irq_lock); irq->target_vcpu = vcpu; spin_unlock(&irq->irq_lock); - return 0; + if (irq->hw) { + struct its_vlpi_map map; + + ret = its_get_vlpi(irq->host_irq, &map); + if (ret) + return ret; + + map.vpe = &vcpu->arch.vgic_cpu.vgic_v3.its_vpe; + + ret = its_map_vlpi(irq->host_irq, &map); + } + + return ret; } /* -- cgit v1.2.3