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authorMarc Zyngier <marc.zyngier@arm.com>2017-10-27 15:28:54 +0100
committerChristoffer Dall <christoffer.dall@linaro.org>2017-11-10 09:45:06 +0100
commita75460547e13c99762c2f9dbfcdd13ad416f91c5 (patch)
tree8c6e05e5e0cb42db4c969f79a67d5a50913d03af /virt/kvm/arm/vgic/vgic-v3.c
parentd3d83f7fef9dfa8bf5a279497dcaa3dd690bce2f (diff)
downloadlinux-a75460547e13c99762c2f9dbfcdd13ad416f91c5.tar.bz2
KVM: arm/arm64: GICv4: Enable VLPI support
All it takes is the has_v4 flag to be set in gic_kvm_info as well as "kvm-arm.vgic_v4_enable=1" being passed on the command line for GICv4 to be enabled in KVM. Acked-by: Christoffer Dall <cdall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'virt/kvm/arm/vgic/vgic-v3.c')
-rw-r--r--virt/kvm/arm/vgic/vgic-v3.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/virt/kvm/arm/vgic/vgic-v3.c b/virt/kvm/arm/vgic/vgic-v3.c
index 863351c090d8..2f05f732d3fd 100644
--- a/virt/kvm/arm/vgic/vgic-v3.c
+++ b/virt/kvm/arm/vgic/vgic-v3.c
@@ -24,6 +24,7 @@
static bool group0_trap;
static bool group1_trap;
static bool common_trap;
+static bool gicv4_enable;
void vgic_v3_set_underflow(struct kvm_vcpu *vcpu)
{
@@ -461,6 +462,12 @@ static int __init early_common_trap_cfg(char *buf)
}
early_param("kvm-arm.vgic_v3_common_trap", early_common_trap_cfg);
+static int __init early_gicv4_enable(char *buf)
+{
+ return strtobool(buf, &gicv4_enable);
+}
+early_param("kvm-arm.vgic_v4_enable", early_gicv4_enable);
+
/**
* vgic_v3_probe - probe for a GICv3 compatible interrupt controller in DT
* @node: pointer to the DT node
@@ -480,6 +487,13 @@ int vgic_v3_probe(const struct gic_kvm_info *info)
kvm_vgic_global_state.can_emulate_gicv2 = false;
kvm_vgic_global_state.ich_vtr_el2 = ich_vtr_el2;
+ /* GICv4 support? */
+ if (info->has_v4) {
+ kvm_vgic_global_state.has_gicv4 = gicv4_enable;
+ kvm_info("GICv4 support %sabled\n",
+ gicv4_enable ? "en" : "dis");
+ }
+
if (!info->vcpu.start) {
kvm_info("GICv3: no GICV resource entry\n");
kvm_vgic_global_state.vcpu_base = 0;