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| author | Marc Zyngier <marc.zyngier@arm.com> | 2016-03-03 16:43:58 +0100 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2016-03-09 05:23:00 +0100 |
| commit | d6400d77463d5c3dd386c27d07a236a07daaf33e (patch) | |
| tree | cca97ef1066cd935cc6f799e3d948bf5fb24a576 /virt | |
| parent | KVM: arm/arm64: vgic-v2: Do not save an LR known to be empty (diff) | |
| download | linux-d6400d77463d5c3dd386c27d07a236a07daaf33e.tar.xz linux-d6400d77463d5c3dd386c27d07a236a07daaf33e.zip | |
KVM: arm/arm64: vgic-v2: Reset LRs at boot time
In order to let make the GICv2 code more lazy in the way it
accesses the LRs, it is necessary to start with a clean slate.
Let's reset the LRs on each CPU when the vgic is probed.
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/arm/vgic-v2.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/virt/kvm/arm/vgic-v2.c b/virt/kvm/arm/vgic-v2.c index ff02f08df74d..67ec334ce1d0 100644 --- a/virt/kvm/arm/vgic-v2.c +++ b/virt/kvm/arm/vgic-v2.c @@ -176,6 +176,15 @@ static const struct vgic_ops vgic_v2_ops = { static struct vgic_params vgic_v2_params; +static void vgic_cpu_init_lrs(void *params) +{ + struct vgic_params *vgic = params; + int i; + + for (i = 0; i < vgic->nr_lr; i++) + writel_relaxed(0, vgic->vctrl_base + GICH_LR0 + (i * 4)); +} + /** * vgic_v2_probe - probe for a GICv2 compatible interrupt controller in DT * @node: pointer to the DT node @@ -257,6 +266,9 @@ int vgic_v2_probe(struct device_node *vgic_node, vgic->type = VGIC_V2; vgic->max_gic_vcpus = VGIC_V2_MAX_CPUS; + + on_each_cpu(vgic_cpu_init_lrs, vgic, 1); + *ops = &vgic_v2_ops; *params = vgic; goto out; |