From 2724c11a1df4b22ee966c04809ea0e808f66b04e Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Fri, 9 Jun 2017 12:49:39 +0100 Subject: [PATCH] KVM: arm64: vgic-v3: Add ICV_HPPIR1_EL1 handler Add a handler for reading the guest's view of the ICV_HPPIR1_EL1 register. This is a simple parsing of the available LRs, extracting the highest available interrupt. Tested-by: Alexander Graf Acked-by: David Daney Reviewed-by: Eric Auger Signed-off-by: Marc Zyngier Reviewed-by: Christoffer Dall Signed-off-by: Christoffer Dall --- 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 563bba108442..0ce7f81dd47e 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -185,6 +185,7 @@ #define SYS_ICC_SGI1R_EL1 sys_reg(3, 0, 12, 11, 5) #define SYS_ICC_IAR1_EL1 sys_reg(3, 0, 12, 12, 0) #define SYS_ICC_EOIR1_EL1 sys_reg(3, 0, 12, 12, 1) +#define SYS_ICC_HPPIR1_EL1 sys_reg(3, 0, 12, 12, 2) #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) diff --git a/virt/kvm/arm/hyp/vgic-v3-sr.c b/virt/kvm/arm/hyp/vgic-v3-sr.c index 1c85a6df22d9..f031e8f088ae 100644 --- a/virt/kvm/arm/hyp/vgic-v3-sr.c +++ b/virt/kvm/arm/hyp/vgic-v3-sr.c @@ -790,6 +790,26 @@ static void __hyp_text __vgic_v3_write_apxr3(struct kvm_vcpu *vcpu, __vgic_v3_write_apxrn(vcpu, rt, 3); } +static void __hyp_text __vgic_v3_read_hppir(struct kvm_vcpu *vcpu, + u32 vmcr, int rt) +{ + u64 lr_val; + int lr, lr_grp, grp; + + grp = __vgic_v3_get_group(vcpu); + + lr = __vgic_v3_highest_priority_lr(vcpu, vmcr, &lr_val); + if (lr == -1) + goto spurious; + + lr_grp = !!(lr_val & ICH_LR_GROUP); + if (lr_grp != grp) + lr_val = ICC_IAR1_EL1_SPURIOUS; + +spurious: + vcpu_set_reg(vcpu, rt, lr_val & ICH_LR_VIRTUAL_ID_MASK); +} + int __hyp_text __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu) { int rt; @@ -854,6 +874,9 @@ int __hyp_text __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu) else fn = __vgic_v3_write_apxr3; break; + case SYS_ICC_HPPIR1_EL1: + fn = __vgic_v3_read_hppir; + break; default: return 0; } -- 2.30.2