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authorMarc Zyngier <marc.zyngier@arm.com>2017-10-27 17:28:36 +0300
committerChristoffer Dall <christoffer.dall@linaro.org>2017-11-10 10:51:58 +0300
commit08c9fd04211754a34dddbb1471d6265a717ef7fd (patch)
tree0500ad23bb38fe86db95d77a33d49ed7e818b38b /virt
parentbebfd2a203736a42510ecf48ae82c9d7e801eeb0 (diff)
downloadlinux-08c9fd04211754a34dddbb1471d6265a717ef7fd.tar.xz
KVM: arm/arm64: vITS: Add a helper to update the affinity of an LPI
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>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/arm/vgic/vgic-its.c20
1 files changed, 11 insertions, 9 deletions
diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c
index 1de4e68ef1b6..09accdfed189 100644
--- a/virt/kvm/arm/vgic/vgic-its.c
+++ b/virt/kvm/arm/vgic/vgic-its.c
@@ -336,6 +336,15 @@ static int vgic_copy_lpi_list(struct kvm_vcpu *vcpu, u32 **intid_ptr)
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
* 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;
vcpu = kvm_get_vcpu(kvm, ite->collection->target_addr);
-
- spin_lock(&ite->irq->irq_lock);
- ite->irq->target_vcpu = vcpu;
- spin_unlock(&ite->irq->irq_lock);
+ update_affinity(ite->irq, vcpu);
}
/*
@@ -696,11 +702,7 @@ static int vgic_its_cmd_handle_movi(struct kvm *kvm, struct vgic_its *its,
ite->collection = collection;
vcpu = kvm_get_vcpu(kvm, collection->target_addr);
- spin_lock(&ite->irq->irq_lock);
- ite->irq->target_vcpu = vcpu;
- spin_unlock(&ite->irq->irq_lock);
-
- return 0;
+ return update_affinity(ite->irq, vcpu);
}
/*