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Commit d6400d77 authored by Marc Zyngier's avatar Marc Zyngier
Browse files

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: default avatarChristoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent f8cfbce1

virt/kvm/arm/vgic-v2.c

+12 −0
Original line number Diff line number Diff line
@@ -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;