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authorMarc Zyngier <marc.zyngier@arm.com>2017-06-09 12:49:51 +0100
committerMarc Zyngier <marc.zyngier@arm.com>2017-06-15 09:45:05 +0100
commitd840b2d37d3ef2463db38274c6fd72619acbe216 (patch)
tree171a4d12bb1b6d9ff8ca05c3f1f84100d688e068 /virt
parent43515894c06f856b7743145e002591309f60b247 (diff)
downloadlinux-d840b2d37d3ef2463db38274c6fd72619acbe216.tar.bz2
KVM: arm64: vgic-v3: Add ICV_CTLR_EL1 handler
Add a handler for reading/writing the guest's view of the ICV_CTLR_EL1 register. only EOIMode and CBPR are of interest here, as all the other bits directly come from ICH_VTR_EL2 and are Read-Only. Tested-by: Alexander Graf <agraf@suse.de> Acked-by: David Daney <david.daney@cavium.com> Acked-by: Christoffer Dall <cdall@linaro.org> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@linaro.org>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/arm/hyp/vgic-v3-sr.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/virt/kvm/arm/hyp/vgic-v3-sr.c b/virt/kvm/arm/hyp/vgic-v3-sr.c
index 406da9c667ff..a8a58dedc38e 100644
--- a/virt/kvm/arm/hyp/vgic-v3-sr.c
+++ b/virt/kvm/arm/hyp/vgic-v3-sr.c
@@ -891,6 +891,46 @@ static void __hyp_text __vgic_v3_read_rpr(struct kvm_vcpu *vcpu,
vcpu_set_reg(vcpu, rt, val);
}
+static void __hyp_text __vgic_v3_read_ctlr(struct kvm_vcpu *vcpu,
+ u32 vmcr, int rt)
+{
+ u32 vtr, val;
+
+ vtr = read_gicreg(ICH_VTR_EL2);
+ /* PRIbits */
+ val = ((vtr >> 29) & 7) << ICC_CTLR_EL1_PRI_BITS_SHIFT;
+ /* IDbits */
+ val |= ((vtr >> 23) & 7) << ICC_CTLR_EL1_ID_BITS_SHIFT;
+ /* SEIS */
+ val |= ((vtr >> 22) & 1) << ICC_CTLR_EL1_SEIS_SHIFT;
+ /* A3V */
+ val |= ((vtr >> 21) & 1) << ICC_CTLR_EL1_A3V_SHIFT;
+ /* EOImode */
+ val |= ((vmcr & ICH_VMCR_EOIM_MASK) >> ICH_VMCR_EOIM_SHIFT) << ICC_CTLR_EL1_EOImode_SHIFT;
+ /* CBPR */
+ val |= (vmcr & ICH_VMCR_CBPR_MASK) >> ICH_VMCR_CBPR_SHIFT;
+
+ vcpu_set_reg(vcpu, rt, val);
+}
+
+static void __hyp_text __vgic_v3_write_ctlr(struct kvm_vcpu *vcpu,
+ u32 vmcr, int rt)
+{
+ u32 val = vcpu_get_reg(vcpu, rt);
+
+ if (val & ICC_CTLR_EL1_CBPR_MASK)
+ vmcr |= ICH_VMCR_CBPR_MASK;
+ else
+ vmcr &= ~ICH_VMCR_CBPR_MASK;
+
+ if (val & ICC_CTLR_EL1_EOImode_MASK)
+ vmcr |= ICH_VMCR_EOIM_MASK;
+ else
+ vmcr &= ~ICH_VMCR_EOIM_MASK;
+
+ write_gicreg(vmcr, ICH_VMCR_EL2);
+}
+
int __hyp_text __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu)
{
int rt;
@@ -983,6 +1023,12 @@ int __hyp_text __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu)
case SYS_ICC_RPR_EL1:
fn = __vgic_v3_read_rpr;
break;
+ case SYS_ICC_CTLR_EL1:
+ if (is_read)
+ fn = __vgic_v3_read_ctlr;
+ else
+ fn = __vgic_v3_write_ctlr;
+ break;
default:
return 0;
}