Commit 423de85a authored by Marc Zyngier's avatar Marc Zyngier

KVM: arm64: vgic-v3: Add ICV_BPR0_EL1 handler

Add a handler for reading/writing the guest's view of the ICC_BPR0_EL1
register, which is located in the ICH_VMCR_EL2.BPR0 field.
Tested-by: default avatarAlexander Graf <agraf@suse.de>
Acked-by: default avatarDavid Daney <david.daney@cavium.com>
Reviewed-by: default avatarEric Auger <eric.auger@redhat.com>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Reviewed-by: default avatarChristoffer Dall <cdall@linaro.org>
Signed-off-by: default avatarChristoffer Dall <cdall@linaro.org>
parent 182936ee
......@@ -180,6 +180,7 @@
#define SYS_VBAR_EL1 sys_reg(3, 0, 12, 0, 0)
#define SYS_ICC_BPR0_EL1 sys_reg(3, 0, 12, 8, 3)
#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)
......
......@@ -706,11 +706,33 @@ static void __hyp_text __vgic_v3_write_igrpen1(struct kvm_vcpu *vcpu, u32 vmcr,
__vgic_v3_write_vmcr(vmcr);
}
static void __hyp_text __vgic_v3_read_bpr0(struct kvm_vcpu *vcpu, u32 vmcr, int rt)
{
vcpu_set_reg(vcpu, rt, __vgic_v3_get_bpr0(vmcr));
}
static void __hyp_text __vgic_v3_read_bpr1(struct kvm_vcpu *vcpu, u32 vmcr, int rt)
{
vcpu_set_reg(vcpu, rt, __vgic_v3_get_bpr1(vmcr));
}
static void __hyp_text __vgic_v3_write_bpr0(struct kvm_vcpu *vcpu, u32 vmcr, int rt)
{
u64 val = vcpu_get_reg(vcpu, rt);
u8 bpr_min = __vgic_v3_bpr_min() - 1;
/* Enforce BPR limiting */
if (val < bpr_min)
val = bpr_min;
val <<= ICH_VMCR_BPR0_SHIFT;
val &= ICH_VMCR_BPR0_MASK;
vmcr &= ~ICH_VMCR_BPR0_MASK;
vmcr |= val;
__vgic_v3_write_vmcr(vmcr);
}
static void __hyp_text __vgic_v3_write_bpr1(struct kvm_vcpu *vcpu, u32 vmcr, int rt)
{
u64 val = vcpu_get_reg(vcpu, rt);
......@@ -888,6 +910,12 @@ 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_BPR0_EL1:
if (is_read)
fn = __vgic_v3_read_bpr0;
else
fn = __vgic_v3_write_bpr0;
break;
default:
return 0;
}
......
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