This supports SDEI_EVENT_GET_INFO hypercall. It's used by guest to retrieve various information about the event: type, signaled, priority, routing mode and affinity. SDEI_INVALID_PARAMETERS is returned for the requests about routing mode and affinity as they are only valid for the shared event, which isn't supported.
Signed-off-by: Gavin Shan <[email protected]> --- arch/arm64/kvm/sdei.c | 54 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c index b847c6028b74..9e642d01e303 100644 --- a/arch/arm64/kvm/sdei.c +++ b/arch/arm64/kvm/sdei.c @@ -289,6 +289,57 @@ static unsigned long hypercall_status(struct kvm_vcpu *vcpu) return ret; } +static unsigned long hypercall_info(struct kvm_vcpu *vcpu) +{ + struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; + struct kvm_sdei_exposed_event *exposed_event; + struct kvm_sdei_event *event; + unsigned int num = smccc_get_arg(vcpu, 1); + unsigned long info = smccc_get_arg(vcpu, 2); + 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_INVALID_PARAMETERS; + goto unlock; + } + + /* + * Retrieve the requested information. The shared events aren't + * supported yet. So the requests to retrieve routing mode and + * affinity should fail for now. + */ + exposed_event = event->exposed_event; + switch (info) { + case SDEI_EVENT_INFO_EV_TYPE: + ret = exposed_event->type; + break; + case SDEI_EVENT_INFO_EV_SIGNALED: + ret = exposed_event->signaled; + break; + case SDEI_EVENT_INFO_EV_PRIORITY: + ret = exposed_event->priority; + break; + case SDEI_EVENT_INFO_EV_ROUTING_MODE: + case SDEI_EVENT_INFO_EV_ROUTING_AFF: + default: + ret = SDEI_INVALID_PARAMETERS; + } + +unlock: + spin_unlock(&vsdei->lock); +out: + return ret; +} + int kvm_sdei_call(struct kvm_vcpu *vcpu) { struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; @@ -328,6 +379,9 @@ int kvm_sdei_call(struct kvm_vcpu *vcpu) case SDEI_1_0_FN_SDEI_EVENT_STATUS: ret = hypercall_status(vcpu); break; + case SDEI_1_0_FN_SDEI_EVENT_GET_INFO: + ret = hypercall_info(vcpu); + break; default: ret = SDEI_NOT_SUPPORTED; } -- 2.23.0 _______________________________________________ kvmarm mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
