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KVM: arm/arm64: vITS: Add a helper to update the affinity of an LPI

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In order to help integrating the vITS code with GICv4, let's add
a new helper that deals with updating the affinity of an LPI,
which will later be augmented with super duper extra GICv4
goodness.

Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
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 15:28:36 +01:00 committed by Christoffer Dall
parent bebfd2a203
commit 08c9fd0421
1 changed files with 11 additions and 9 deletions
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20
virt/kvm/arm/vgic/vgic-its.c
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@ -336,6 +336,15 @@ static int vgic_copy_lpi_list(struct kvm_vcpu *vcpu, u32 **intid_ptr)
return i; return i;
} }
static int update_affinity(struct vgic_irq *irq, struct kvm_vcpu *vcpu)
{
spin_lock(&irq->irq_lock);
irq->target_vcpu = vcpu;
spin_unlock(&irq->irq_lock);
return 0;
}
/* /*
* Promotes the ITS view of affinity of an ITTE (which redistributor this LPI * Promotes the ITS view of affinity of an ITTE (which redistributor this LPI
* is targeting) to the VGIC's view, which deals with target VCPUs. * is targeting) to the VGIC's view, which deals with target VCPUs.
@ -350,10 +359,7 @@ static void update_affinity_ite(struct kvm *kvm, struct its_ite *ite)
return; return;
vcpu = kvm_get_vcpu(kvm, ite->collection->target_addr); vcpu = kvm_get_vcpu(kvm, ite->collection->target_addr);
update_affinity(ite->irq, vcpu);
spin_lock(&ite->irq->irq_lock);
ite->irq->target_vcpu = vcpu;
spin_unlock(&ite->irq->irq_lock);
} }
/* /*
@ -696,11 +702,7 @@ static int vgic_its_cmd_handle_movi(struct kvm *kvm, struct vgic_its *its,
ite->collection = collection; ite->collection = collection;
vcpu = kvm_get_vcpu(kvm, collection->target_addr); vcpu = kvm_get_vcpu(kvm, collection->target_addr);
spin_lock(&ite->irq->irq_lock); return update_affinity(ite->irq, vcpu);
ite->irq->target_vcpu = vcpu;
spin_unlock(&ite->irq->irq_lock);
return 0;
} }
/* /*