This supports SDEI_{PRIVATE, SHARED}_RESET. They are used by the
guest to reset the private events on the calling vCPU or the
shared events on all vCPUs.
Signed-off-by: Gavin Shan <gshan@xxxxxxxxxx>
---
arch/arm64/kvm/sdei.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c
index b2a916724cfa..0dec35a0eed1 100644
--- a/arch/arm64/kvm/sdei.c
+++ b/arch/arm64/kvm/sdei.c
@@ -637,6 +637,31 @@ static unsigned long hypercall_mask(struct kvm_vcpu *vcpu, bool mask)
return ret;
}
+static unsigned long hypercall_reset(struct kvm_vcpu *vcpu, bool private)
+{
+ struct kvm *kvm = vcpu->kvm;
+ struct kvm_sdei_kvm *ksdei = kvm->arch.sdei;
+ struct kvm_sdei_exposed_event *exposed_event;
+ struct kvm_sdei_registered_event *registered_event, *tmp;
+ unsigned long r, ret = SDEI_SUCCESS;
+
+ spin_lock(&ksdei->lock);
+
+ list_for_each_entry_safe(registered_event, tmp,
+ &ksdei->registered_events, link) {
+ exposed_event = registered_event->exposed_event;
+ if (private ^ kvm_sdei_is_shared(exposed_event->state.type))
+ continue;
+
+ r = unregister_one_event(kvm, NULL, registered_event);
+ ret = (r == SDEI_SUCCESS) ? ret : r;
+ }
+
+ spin_unlock(&ksdei->lock);
+
+ return ret;
+}
+
int kvm_sdei_hypercall(struct kvm_vcpu *vcpu)
{
struct kvm *kvm = vcpu->kvm;
@@ -700,8 +725,14 @@ int kvm_sdei_hypercall(struct kvm_vcpu *vcpu)
case SDEI_1_0_FN_SDEI_INTERRUPT_BIND:
case SDEI_1_0_FN_SDEI_INTERRUPT_RELEASE:
case SDEI_1_1_FN_SDEI_EVENT_SIGNAL:
+ ret = SDEI_NOT_SUPPORTED;
+ break;
case SDEI_1_0_FN_SDEI_PRIVATE_RESET:
+ ret = hypercall_reset(vcpu, true);
+ break;
case SDEI_1_0_FN_SDEI_SHARED_RESET:
+ ret = hypercall_reset(vcpu, false);
+ break;
case SDEI_1_1_FN_SDEI_FEATURES:
default:
ret = SDEI_NOT_SUPPORTED;
--
2.23.0
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