This supports EVENT_STATUS hypercall. It's used to retrieve the
status about the specified event. A bitmap is returned to represent
the event status, which includes state of registration, enablement,
and running.
Signed-off-by: Gavin Shan <gshan@xxxxxxxxxx>
---
arch/arm64/kvm/sdei.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c
index b44ab302732d..377341f229da 100644
--- a/arch/arm64/kvm/sdei.c
+++ b/arch/arm64/kvm/sdei.c
@@ -118,6 +118,25 @@ static unsigned long event_unregister(struct kvm_vcpu *vcpu)
return SDEI_SUCCESS;
}
+static unsigned long event_status(struct kvm_vcpu *vcpu)
+{
+ struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei;
+ unsigned int num = smccc_get_arg(vcpu, 1);
+ unsigned long ret = 0;
+
+ if (num >= KVM_NR_SDEI_EVENTS)
+ return SDEI_INVALID_PARAMETERS;
+
+ if (test_bit(num, &vsdei->registered))
+ ret |= (1UL << SDEI_EVENT_STATUS_REGISTERED);
+ if (test_bit(num, &vsdei->enabled))
+ ret |= (1UL << SDEI_EVENT_STATUS_ENABLED);
+ if (test_bit(num, &vsdei->running))
+ ret |= (1UL << SDEI_EVENT_STATUS_RUNNING);
+
+ return ret;
+}
+
int kvm_sdei_call(struct kvm_vcpu *vcpu)
{
struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei;
@@ -151,6 +170,9 @@ int kvm_sdei_call(struct kvm_vcpu *vcpu)
case SDEI_1_0_FN_SDEI_EVENT_UNREGISTER:
ret = event_unregister(vcpu);
break;
+ case SDEI_1_0_FN_SDEI_EVENT_STATUS:
+ ret = event_status(vcpu);
+ break;
default:
ret = SDEI_NOT_SUPPORTED;
}
--
2.23.0
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