[PATCH v2 14/25] KVM: arm64: vgic-v3: Add ICV_IGNREN0_EL1 handler

Marc Zyngier
2017-06-01T10:17:59Z

Add a handler for reading/writing the guest's view of the ICC_IGRPEN0_EL1
register, which is located in the ICH_VMCR_EL2.VENG0 field.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm64/include/asm/sysreg.h | 1 +
virt/kvm/arm/hyp/vgic-v3-sr.c | 23 +++++++++++++++++++++++
2 files changed, 24 insertions(+)

diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index d20be0b28ca4..ba93bc7ac8e4 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -190,6 +190,7 @@
#define SYS_ICC_BPR1_EL1 sys_reg(3, 0, 12, 12, 3)
#define SYS_ICC_CTLR_EL1 sys_reg(3, 0, 12, 12, 4)
#define SYS_ICC_SRE_EL1 sys_reg(3, 0, 12, 12, 5)
+#define SYS_ICC_GRPEN0_EL1 sys_reg(3, 0, 12, 12, 6)
#define SYS_ICC_GRPEN1_EL1 sys_reg(3, 0, 12, 12, 7)

#define SYS_CONTEXTIDR_EL1 sys_reg(3, 0, 13, 0, 1)
diff --git a/virt/kvm/arm/hyp/vgic-v3-sr.c b/virt/kvm/arm/hyp/vgic-v3-sr.c
index 54a8e828c85b..b1b9129da045 100644
--- a/virt/kvm/arm/hyp/vgic-v3-sr.c
+++ b/virt/kvm/arm/hyp/vgic-v3-sr.c
@@ -671,11 +671,28 @@ static void __hyp_text __vgic_v3_write_eoir(struct kvm_vcpu *vcpu, u32 vmcr, int
__vgic_v3_clear_active_lr(lr, lr_val);
}

+static void __hyp_text __vgic_v3_read_igrpen0(struct kvm_vcpu *vcpu, u32 vmcr, int rt)
+{
+ vcpu_set_reg(vcpu, rt, !!(vmcr & ICH_VMCR_ENG0_MASK));
+}
+
static void __hyp_text __vgic_v3_read_igrpen1(struct kvm_vcpu *vcpu, u32 vmcr, int rt)
{
vcpu_set_reg(vcpu, rt, !!(vmcr & ICH_VMCR_ENG1_MASK));
}

+static void __hyp_text __vgic_v3_write_igrpen0(struct kvm_vcpu *vcpu, u32 vmcr, int rt)
+{
+ u64 val = vcpu_get_reg(vcpu, rt);
+
+ if (val & 1)
+ vmcr |= ICH_VMCR_ENG0_MASK;
+ else
+ vmcr &= ~ICH_VMCR_ENG0_MASK;
+
+ __vgic_v3_write_vmcr(vmcr);
+}
+
static void __hyp_text __vgic_v3_write_igrpen1(struct kvm_vcpu *vcpu, u32 vmcr, int rt)
{
u64 val = vcpu_get_reg(vcpu, rt);
@@ -900,6 +917,12 @@ int __hyp_text __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu)
case SYS_ICC_HPPIR1_EL1:
fn = __vgic_v3_read_hppir;
break;
+ case SYS_ICC_GRPEN0_EL1:
+ if (is_read)
+ fn = __vgic_v3_read_igrpen0;
+ else
+ fn = __vgic_v3_write_igrpen0;
+ break;
case SYS_ICC_BPR0_EL1:
if (is_read)
fn = __vgic_v3_read_bpr0;
--
2.11.0