This supports SDEI_EVENT_{ENABLE, DISABLE} hypercall. After the
event is registered, it won't be raised and delivered to guest
until it's enabled. On other hand, the event won't be delivered
to guest if it's disabled.
Signed-off-by: Gavin Shan <gshan@xxxxxxxxxx>
---
arch/arm64/kvm/sdei.c | 45 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 45 insertions(+)
diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c
index 89c1b231cb60..941263578b30 100644
--- a/arch/arm64/kvm/sdei.c
+++ b/arch/arm64/kvm/sdei.c
@@ -101,6 +101,45 @@ static unsigned long hypercall_register(struct kvm_vcpu *vcpu)
return ret;
}
+static unsigned long hypercall_enable(struct kvm_vcpu *vcpu, bool enable)
+{
+ struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei;
+ struct kvm_sdei_event *event;
+ unsigned long num = smccc_get_arg(vcpu, 1);
+ unsigned long ret = SDEI_SUCCESS;
+
+ if (!kvm_sdei_is_supported(num)) {
+ ret = SDEI_INVALID_PARAMETERS;
+ goto out;
+ }
+
+ spin_lock(&vsdei->lock);
+
+ /* Check if the event exists */
+ event = find_event(vcpu, num);
+ if (!event) {
+ ret = SDEI_DENIED;
+ goto unlock;
+ }
+
+ /* Check the event state */
+ if (!kvm_sdei_is_registered(event) ||
+ kvm_sdei_is_unregister_pending(event)) {
+ ret = SDEI_DENIED;
+ goto unlock;
+ }
+
+ if (enable)
+ kvm_sdei_set_enabled(event);
+ else
+ kvm_sdei_clear_enabled(event);
+
+unlock:
+ spin_unlock(&vsdei->lock);
+out:
+ return ret;
+}
+
int kvm_sdei_call(struct kvm_vcpu *vcpu)
{
struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei;
@@ -125,6 +164,12 @@ int kvm_sdei_call(struct kvm_vcpu *vcpu)
case SDEI_1_0_FN_SDEI_EVENT_REGISTER:
ret = hypercall_register(vcpu);
break;
+ case SDEI_1_0_FN_SDEI_EVENT_ENABLE:
+ ret = hypercall_enable(vcpu, true);
+ break;
+ case SDEI_1_0_FN_SDEI_EVENT_DISABLE:
+ ret = hypercall_enable(vcpu, false);
+ break;
default:
ret = SDEI_NOT_SUPPORTED;
}
--
2.23.0
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