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authorMarc Zyngier <marc.zyngier@arm.com>2017-06-09 12:49:49 +0100
committerMarc Zyngier <marc.zyngier@arm.com>2017-06-15 09:45:04 +0100
commit40228ba57c8532d4977d684a363915402d85dbf9 (patch)
treef0d39703b30020857f34419b46e972090a5f46cc /virt/kvm/arm
parent690a341577f9adf2c275ababe0dcefe91898bbf0 (diff)
downloadlinux-40228ba57c8532d4977d684a363915402d85dbf9.tar.bz2
KVM: arm64: vgic-v3: Add ICV_DIR_EL1 handler
Add a handler for writing the guest's view of the ICC_DIR_EL1 register, performing the deactivation of an interrupt if EOImode is set ot 1. Tested-by: Alexander Graf <agraf@suse.de> Acked-by: David Daney <david.daney@cavium.com> Reviewed-by: Christoffer Dall <cdall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@linaro.org>
Diffstat (limited to 'virt/kvm/arm')
-rw-r--r--virt/kvm/arm/hyp/vgic-v3-sr.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/virt/kvm/arm/hyp/vgic-v3-sr.c b/virt/kvm/arm/hyp/vgic-v3-sr.c
index 08a5d76c82c7..2f2af03e8932 100644
--- a/virt/kvm/arm/hyp/vgic-v3-sr.c
+++ b/virt/kvm/arm/hyp/vgic-v3-sr.c
@@ -652,6 +652,30 @@ static void __hyp_text __vgic_v3_bump_eoicount(void)
write_gicreg(hcr, ICH_HCR_EL2);
}
+static void __hyp_text __vgic_v3_write_dir(struct kvm_vcpu *vcpu,
+ u32 vmcr, int rt)
+{
+ u32 vid = vcpu_get_reg(vcpu, rt);
+ u64 lr_val;
+ int lr;
+
+ /* EOImode == 0, nothing to be done here */
+ if (!(vmcr & ICH_VMCR_EOIM_MASK))
+ return;
+
+ /* No deactivate to be performed on an LPI */
+ if (vid >= VGIC_MIN_LPI)
+ return;
+
+ lr = __vgic_v3_find_active_lr(vcpu, vid, &lr_val);
+ if (lr == -1) {
+ __vgic_v3_bump_eoicount();
+ return;
+ }
+
+ __vgic_v3_clear_active_lr(lr, lr_val);
+}
+
static void __hyp_text __vgic_v3_write_eoir(struct kvm_vcpu *vcpu, u32 vmcr, int rt)
{
u32 vid = vcpu_get_reg(vcpu, rt);
@@ -946,6 +970,9 @@ int __hyp_text __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu)
else
fn = __vgic_v3_write_bpr0;
break;
+ case SYS_ICC_DIR_EL1:
+ fn = __vgic_v3_write_dir;
+ break;
default:
return 0;
}