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KVM: arm/arm64: GICv4: Propagate affinity changes to the physical ITS

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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 <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
This commit is contained in:
Marc Zyngier
2017-10-27 15:28:42 +01:00
committed by Christoffer Dall
parent 07b46ed116
commit 0fc9a58ee4
1 changed files with 15 additions and 1 deletions
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virt/kvm/arm/vgic/vgic-its.c
+15 -1
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@@ -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) static int update_affinity(struct vgic_irq *irq, struct kvm_vcpu *vcpu)
{ {
int ret = 0;
spin_lock(&irq->irq_lock); spin_lock(&irq->irq_lock);
irq->target_vcpu = vcpu; irq->target_vcpu = vcpu;
spin_unlock(&irq->irq_lock); 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;
} }
/* /*