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    Subject[PATCH v5 07/26] KVM: arm/arm64: vITS: Add a helper to update the affinity of an LPI
    Date
    In order 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>
    Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
    ---
    virt/kvm/arm/vgic/vgic-its.c | 20 +++++++++++---------
    1 file changed, 11 insertions(+), 9 deletions(-)

    diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c
    index 475dffd0a44c..8ee03f1e89fc 100644
    --- a/virt/kvm/arm/vgic/vgic-its.c
    +++ b/virt/kvm/arm/vgic/vgic-its.c
    @@ -335,6 +335,15 @@ 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.
    @@ -349,10 +358,7 @@ 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);
    }

    /*
    @@ -693,11 +699,7 @@ 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);
    }

    /*
    --
    2.11.0
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