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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>
steinar/wifi_calib_4_9_kernel
Marc Zyngier 2016-03-03 15:43:58 +00:00
parent f8cfbce1bb
commit d6400d7746
1 changed files with 12 additions and 0 deletions
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12
virt/kvm/arm/vgic-v2.c
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@ -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;