This supports SDEI_1_0_FN_SDEI_EVENT_STATUS hypercall by adding the
function kvm_sdei_hypercall_status(). On success, the event's current
status is returned. Otherwise, errno is returned.
Signed-off-by: Gavin Shan <gshan@xxxxxxxxxx>
---
arch/arm64/kvm/sdei.c | 50 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 50 insertions(+)
diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c
index 63d621dc9711..2d2135a5c3ea 100644
--- a/arch/arm64/kvm/sdei.c
+++ b/arch/arm64/kvm/sdei.c
@@ -414,6 +414,54 @@ static unsigned long kvm_sdei_hypercall_unregister(struct kvm_vcpu *vcpu)
return ret;
}
+static unsigned long kvm_sdei_hypercall_status(struct kvm_vcpu *vcpu)
+{
+ struct kvm *kvm = vcpu->kvm;
+ struct kvm_sdei_event *event = NULL;
+ struct kvm_sdei_kvm_event *kevent = NULL;
+ unsigned long event_num = smccc_get_arg1(vcpu);
+ unsigned long event_type;
+ int index = 0;
+ unsigned long ret = SDEI_SUCCESS;
+
+ /* Validate event number */
+ if (!kvm_sdei_num_is_valid(event_num)) {
+ ret = SDEI_INVALID_PARAMETERS;
+ goto out;
+ }
+
+ if (!(kvm_sdei_data && kvm_sdei_data->supported) &&
+ kvm_sdei_num_is_virt(event_num)) {
+ ret = SDEI_INVALID_PARAMETERS;
+ goto out;
+ }
+
+ /* Find the event */
+ spin_lock(&kvm_sdei_lock);
+ event = kvm_sdei_find_event(kvm, event_num, &kevent, NULL, NULL);
+ if (!kevent) {
+ ret = SDEI_INVALID_PARAMETERS;
+ goto unlock;
+ }
+
+ spin_lock(&event->lock);
+
+ event_type = event->priv ? event->priv->type : event->event->type;
+ index = (event_type == SDEI_EVENT_TYPE_PRIVATE) ? vcpu->vcpu_idx : 0;
+ if (test_bit(index, kevent->registered))
+ ret |= (1UL << SDEI_EVENT_STATUS_REGISTERED);
+ if (test_bit(index, kevent->enabled))
+ ret |= (1UL << SDEI_EVENT_STATUS_ENABLED);
+ if (kevent->users)
+ ret |= (1UL << SDEI_EVENT_STATUS_RUNNING);
+
+ spin_unlock(&event->lock);
+unlock:
+ spin_unlock(&kvm_sdei_lock);
+out:
+ return ret;
+}
+
static unsigned long kvm_sdei_reset(struct kvm *kvm, unsigned int types)
{
struct kvm_sdei_event *e, *event = NULL;
@@ -503,6 +551,8 @@ int kvm_sdei_hypercall(struct kvm_vcpu *vcpu)
ret = kvm_sdei_hypercall_unregister(vcpu);
break;
case SDEI_1_0_FN_SDEI_EVENT_STATUS:
+ ret = kvm_sdei_hypercall_status(vcpu);
+ break;
case SDEI_1_0_FN_SDEI_EVENT_GET_INFO:
case SDEI_1_0_FN_SDEI_EVENT_ROUTING_SET:
case SDEI_1_0_FN_SDEI_PE_MASK:
--
2.23.0
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