[PATCH v6 10/18] KVM: arm64: Support SDEI_PE_{MASK, UNMASK} hypercall

[Gavin Shan]

This supports SDEI_PE_{MASK, UNMASK} hypercall. They are used by
guest to stop or start receiving event on the specified vcpu.

Signed-off-by: Gavin Shan <gshan@xxxxxxxxxx>
---
 arch/arm64/kvm/sdei.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c
index 9e642d01e303..3aca36e7e27b 100644
--- a/arch/arm64/kvm/sdei.c
+++ b/arch/arm64/kvm/sdei.c
@@ -340,6 +340,18 @@ static unsigned long hypercall_info(struct kvm_vcpu *vcpu)
 	return ret;
 }
 
+static unsigned long hypercall_mask(struct kvm_vcpu *vcpu, bool mask)
+{
+	struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei;
+	unsigned long ret = SDEI_SUCCESS;
+
+	spin_lock(&vsdei->lock);
+	vsdei->masked = mask ? 1 : 0;
+	spin_unlock(&vsdei->lock);
+
+	return ret;
+}
+
 int kvm_sdei_call(struct kvm_vcpu *vcpu)
 {
 	struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei;
@@ -382,6 +394,12 @@ int kvm_sdei_call(struct kvm_vcpu *vcpu)
 	case SDEI_1_0_FN_SDEI_EVENT_GET_INFO:
 		ret = hypercall_info(vcpu);
 		break;
+	case SDEI_1_0_FN_SDEI_PE_MASK:
+		ret = hypercall_mask(vcpu, true);
+		break;
+	case SDEI_1_0_FN_SDEI_PE_UNMASK:
+		ret = hypercall_mask(vcpu, false);
+		break;
 	default:
 		ret = SDEI_NOT_SUPPORTED;
 	}
-- 
2.23.0