From 45b853a0632a65304a820549d23b15648d4b3922 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <marc.zyngier@arm.com>
Date: Fri, 9 Jun 2017 12:49:52 +0100
Subject: [PATCH 170/174] KVM: arm64: vgic-v3: Add ICV_PMR_EL1 handler
Patch-mainline: Submitted, https://www.spinics.net/lists/arm-kernel/msg587082.html
References: bsc#1031492

Add a handler for reading/writing the guest's view of the ICC_PMR_EL1
register, which is located in the ICH_VMCR_EL2.VPMR field.

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: Alexander Graf <agraf@suse.de>

---
 virt/kvm/arm/hyp/vgic-v3-sr.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/virt/kvm/arm/hyp/vgic-v3-sr.c b/virt/kvm/arm/hyp/vgic-v3-sr.c
index a8a58de..15b5576 100644
--- a/virt/kvm/arm/hyp/vgic-v3-sr.c
+++ b/virt/kvm/arm/hyp/vgic-v3-sr.c
@@ -884,6 +884,27 @@ spurious:
 	vcpu_set_reg(vcpu, rt, lr_val & ICH_LR_VIRTUAL_ID_MASK);
 }
 
+static void __hyp_text __vgic_v3_read_pmr(struct kvm_vcpu *vcpu,
+					  u32 vmcr, int rt)
+{
+	vmcr &= ICH_VMCR_PMR_MASK;
+	vmcr >>= ICH_VMCR_PMR_SHIFT;
+	vcpu_set_reg(vcpu, rt, vmcr);
+}
+
+static void __hyp_text __vgic_v3_write_pmr(struct kvm_vcpu *vcpu,
+					   u32 vmcr, int rt)
+{
+	u32 val = vcpu_get_reg(vcpu, rt);
+
+	val <<= ICH_VMCR_PMR_SHIFT;
+	val &= ICH_VMCR_PMR_MASK;
+	vmcr &= ~ICH_VMCR_PMR_MASK;
+	vmcr |= val;
+
+	write_gicreg(vmcr, ICH_VMCR_EL2);
+}
+
 static void __hyp_text __vgic_v3_read_rpr(struct kvm_vcpu *vcpu,
 					  u32 vmcr, int rt)
 {
@@ -1029,6 +1050,12 @@ int __hyp_text __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu)
 		else
 			fn = __vgic_v3_write_ctlr;
 		break;
+	case SYS_ICC_PMR_EL1:
+		if (is_read)
+			fn = __vgic_v3_read_pmr;
+		else
+			fn = __vgic_v3_write_pmr;
+		break;
 	default:
 		return 0;
 	}
-- 
1.8.5.6