KVM: arm64: vgic-v3: Add misc Group-0 handlers

A number of Group-0 registers can be handled by the same accessors
as that of Group-1, so let's add the required system register encodings
and catch them in the dispatching function.

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>

arch/arm64/include/asm/sysreg.h

@@ -180,7 +180,11 @@
 
 #define SYS_VBAR_EL1			sys_reg(3, 0, 12, 0, 0)
 
+#define SYS_ICC_IAR0_EL1		sys_reg(3, 0, 12, 8, 0)
+#define SYS_ICC_EOIR0_EL1		sys_reg(3, 0, 12, 8, 1)
+#define SYS_ICC_HPPIR0_EL1		sys_reg(3, 0, 12, 8, 2)
 #define SYS_ICC_BPR0_EL1		sys_reg(3, 0, 12, 8, 3)
+#define SYS_ICC_AP0Rn_EL1(n)		sys_reg(3, 0, 12, 8, 4 | n)
 #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)

virt/kvm/arm/hyp/vgic-v3-sr.c

@@ -882,9 +882,11 @@ int __hyp_text __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu)
 	is_read = (esr & ESR_ELx_SYS64_ISS_DIR_MASK) == ESR_ELx_SYS64_ISS_DIR_READ;
 
 	switch (sysreg) {
+	case SYS_ICC_IAR0_EL1:
 	case SYS_ICC_IAR1_EL1:
 		fn = __vgic_v3_read_iar;
 		break;
+	case SYS_ICC_EOIR0_EL1:
 	case SYS_ICC_EOIR1_EL1:
 		fn = __vgic_v3_write_eoir;
 		break;
@@ -900,30 +902,35 @@ int __hyp_text __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu)
 		else
 			fn = __vgic_v3_write_bpr1;
 		break;
+	case SYS_ICC_AP0Rn_EL1(0):
 	case SYS_ICC_AP1Rn_EL1(0):
 		if (is_read)
 			fn = __vgic_v3_read_apxr0;
 		else
 			fn = __vgic_v3_write_apxr0;
 		break;
+	case SYS_ICC_AP0Rn_EL1(1):
 	case SYS_ICC_AP1Rn_EL1(1):
 		if (is_read)
 			fn = __vgic_v3_read_apxr1;
 		else
 			fn = __vgic_v3_write_apxr1;
 		break;
+	case SYS_ICC_AP0Rn_EL1(2):
 	case SYS_ICC_AP1Rn_EL1(2):
 		if (is_read)
 			fn = __vgic_v3_read_apxr2;
 		else
 			fn = __vgic_v3_write_apxr2;
 		break;
+	case SYS_ICC_AP0Rn_EL1(3):
 	case SYS_ICC_AP1Rn_EL1(3):
 		if (is_read)
 			fn = __vgic_v3_read_apxr3;
 		else
 			fn = __vgic_v3_write_apxr3;
 		break;
+	case SYS_ICC_HPPIR0_EL1:
 	case SYS_ICC_HPPIR1_EL1:
 		fn = __vgic_v3_read_hppir;
 		break;