[PATCH 15/31] KVM: arm64: vgic-v3: Add ICV_AP1Rn_EL1 handler

Marc Zyngier
2017-05-03T10:43:36Z

Add a handler for reading/writing the guest's view of the ICV_AP1Rn_EL1
registers. We just map them to the corresponding ICH_AP1Rn_EL2 registers.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm64/include/asm/sysreg.h | 1 +
virt/kvm/arm/hyp/vgic-v3-sr.c | 94 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 95 insertions(+)

diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index 15c142ce991c..aad46b8eea5e 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -180,6 +180,7 @@

#define SYS_VBAR_EL1 sys_reg(3, 0, 12, 0, 0)

+#define SYS_ICC_AP1Rn_EL1(n) sys_reg(3, 0, 12, 9, n)
#define SYS_ICC_DIR_EL1 sys_reg(3, 0, 12, 11, 1)
#define SYS_ICC_SGI1R_EL1 sys_reg(3, 0, 12, 11, 5)
#define SYS_ICC_IAR1_EL1 sys_reg(3, 0, 12, 12, 0)
diff --git a/virt/kvm/arm/hyp/vgic-v3-sr.c b/virt/kvm/arm/hyp/vgic-v3-sr.c
index a76351b3ad66..b6803989da1f 100644
--- a/virt/kvm/arm/hyp/vgic-v3-sr.c
+++ b/virt/kvm/arm/hyp/vgic-v3-sr.c
@@ -684,6 +684,76 @@ static void __hyp_text __vgic_v3_write_bpr1(struct kvm_vcpu *vcpu, u32 vmcr, int
__vgic_v3_write_vmcr(vmcr);
}

+static void __hyp_text __vgic_v3_read_apxrn(struct kvm_vcpu *vcpu, int rt, int n)
+{
+ u32 val;
+
+ if (!__vgic_v3_get_group(vcpu))
+ val = __vgic_v3_read_ap0rn(n);
+ else
+ val = __vgic_v3_read_ap1rn(n);
+
+ vcpu_set_reg(vcpu, rt, val);
+}
+
+static void __hyp_text __vgic_v3_write_apxrn(struct kvm_vcpu *vcpu, int rt, int n)
+{
+ u32 val = vcpu_get_reg(vcpu, rt);
+
+ if (!__vgic_v3_get_group(vcpu))
+ __vgic_v3_write_ap0rn(val, n);
+ else
+ __vgic_v3_write_ap1rn(val, n);
+}
+
+static void __hyp_text __vgic_v3_read_apxr0(struct kvm_vcpu *vcpu,
+ u32 vmcr, int rt)
+{
+ __vgic_v3_read_apxrn(vcpu, rt, 0);
+}
+
+static void __hyp_text __vgic_v3_read_apxr1(struct kvm_vcpu *vcpu,
+ u32 vmcr, int rt)
+{
+ __vgic_v3_read_apxrn(vcpu, rt, 1);
+}
+
+static void __hyp_text __vgic_v3_read_apxr2(struct kvm_vcpu *vcpu,
+ u32 vmcr, int rt)
+{
+ __vgic_v3_read_apxrn(vcpu, rt, 2);
+}
+
+static void __hyp_text __vgic_v3_read_apxr3(struct kvm_vcpu *vcpu,
+ u32 vmcr, int rt)
+{
+ __vgic_v3_read_apxrn(vcpu, rt, 3);
+}
+
+static void __hyp_text __vgic_v3_write_apxr0(struct kvm_vcpu *vcpu,
+ u32 vmcr, int rt)
+{
+ __vgic_v3_write_apxrn(vcpu, rt, 0);
+}
+
+static void __hyp_text __vgic_v3_write_apxr1(struct kvm_vcpu *vcpu,
+ u32 vmcr, int rt)
+{
+ __vgic_v3_write_apxrn(vcpu, rt, 1);
+}
+
+static void __hyp_text __vgic_v3_write_apxr2(struct kvm_vcpu *vcpu,
+ u32 vmcr, int rt)
+{
+ __vgic_v3_write_apxrn(vcpu, rt, 2);
+}
+
+static void __hyp_text __vgic_v3_write_apxr3(struct kvm_vcpu *vcpu,
+ u32 vmcr, int rt)
+{
+ __vgic_v3_write_apxrn(vcpu, rt, 3);
+}
+
int __hyp_text __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu)
{
int rt = kvm_vcpu_sys_get_rt(vcpu);
@@ -722,6 +792,30 @@ int __hyp_text __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu)
else
fn = __vgic_v3_write_bpr1;
break;
+ case SYS_ICC_AP1Rn_EL1(0):
+ if (is_read)
+ fn = __vgic_v3_read_apxr0;
+ else
+ fn = __vgic_v3_write_apxr0;
+ break;
+ case SYS_ICC_AP1Rn_EL1(1):
+ if (is_read)
+ fn = __vgic_v3_read_apxr1;
+ else
+ fn = __vgic_v3_write_apxr1;
+ break;
+ case SYS_ICC_AP1Rn_EL1(2):
+ if (is_read)
+ fn = __vgic_v3_read_apxr2;
+ else
+ fn = __vgic_v3_write_apxr2;
+ break;
+ case SYS_ICC_AP1Rn_EL1(3):
+ if (is_read)
+ fn = __vgic_v3_read_apxr3;
+ else
+ fn = __vgic_v3_write_apxr3;
+ break;
default:
return 0;
}
--
2.11.0