This supports SDEI_1_0_FN_SDEI_EVENT_ROUTING_SET hypercall by adding
kvm_sdei_hypercall_route(). On success, the specified routing mode
and affinity is set. Otherwise, errno is returned. The route mode
or affinity is updated to the KVM SDEI event.
Signed-off-by: Gavin Shan <gshan@xxxxxxxxxx>
---
arch/arm64/kvm/sdei.c | 74 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 74 insertions(+)
diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c
index 529505c4f0cf..1e7291acea0d 100644
--- a/arch/arm64/kvm/sdei.c
+++ b/arch/arm64/kvm/sdei.c
@@ -585,6 +585,78 @@ static unsigned long kvm_sdei_hypercall_info(struct kvm_vcpu *vcpu)
return ret;
}
+static unsigned long kvm_sdei_hypercall_route(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 route_mode = smccc_get_arg2(vcpu);
+ unsigned long route_affinity = smccc_get_arg3(vcpu);
+ unsigned long event_type;
+ int index = 0;
+ unsigned long ret = SDEI_SUCCESS;
+
+ /* Validate the parameters */
+ 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;
+ }
+
+ if (!(route_mode == SDEI_EVENT_REGISTER_RM_ANY ||
+ route_mode == SDEI_EVENT_REGISTER_RM_PE)) {
+ 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;
+ }
+
+ /* Sanity check */
+ 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 (event_type != SDEI_EVENT_TYPE_SHARED) {
+ ret = SDEI_INVALID_PARAMETERS;
+ goto unlock_event;
+ }
+
+ if (!test_bit(index, kevent->registered) ||
+ test_bit(index, kevent->enabled) ||
+ kevent->users) {
+ ret = SDEI_DENIED;
+ goto unlock_event;
+ }
+
+ if (route_mode == kevent->route_mode &&
+ route_affinity == kevent->route_affinity) {
+ ret = SDEI_DENIED;
+ goto unlock_event;
+ }
+
+ /* Update status */
+ kevent->route_mode = route_mode;
+ kevent->route_affinity = route_affinity;
+
+unlock_event:
+ 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;
@@ -680,6 +752,8 @@ int kvm_sdei_hypercall(struct kvm_vcpu *vcpu)
ret = kvm_sdei_hypercall_info(vcpu);
break;
case SDEI_1_0_FN_SDEI_EVENT_ROUTING_SET:
+ ret = kvm_sdei_hypercall_route(vcpu);
+ break;
case SDEI_1_0_FN_SDEI_PE_MASK:
case SDEI_1_0_FN_SDEI_PE_UNMASK:
case SDEI_1_0_FN_SDEI_INTERRUPT_BIND:
--
2.23.0
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