This supports SDEI_EVENT_{ENABLE, DISABLE} hypercall. After the
event is registered, it won't be raised and delivered to guest
until it's enabled. On other hand, the event won't be delivered
to guest if it's disabled.Signed-off-by: Gavin Shan <[email protected]> --- arch/arm64/kvm/sdei.c | 45 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c index 89c1b231cb60..941263578b30 100644 --- a/arch/arm64/kvm/sdei.c +++ b/arch/arm64/kvm/sdei.c @@ -101,6 +101,45 @@ static unsigned long hypercall_register(struct kvm_vcpu *vcpu) return ret; } +static unsigned long hypercall_enable(struct kvm_vcpu *vcpu, bool enable) +{ + struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; + struct kvm_sdei_event *event; + unsigned long num = smccc_get_arg(vcpu, 1); + 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_DENIED; + goto unlock; + } + + /* Check the event state */ + if (!kvm_sdei_is_registered(event) || + kvm_sdei_is_unregister_pending(event)) { + ret = SDEI_DENIED; + goto unlock; + } + + if (enable) + kvm_sdei_set_enabled(event); + else + kvm_sdei_clear_enabled(event); + +unlock: + spin_unlock(&vsdei->lock); +out: + return ret; +} + int kvm_sdei_call(struct kvm_vcpu *vcpu) { struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei; @@ -125,6 +164,12 @@ int kvm_sdei_call(struct kvm_vcpu *vcpu) case SDEI_1_0_FN_SDEI_EVENT_REGISTER: ret = hypercall_register(vcpu); break; + case SDEI_1_0_FN_SDEI_EVENT_ENABLE: + ret = hypercall_enable(vcpu, true); + break; + case SDEI_1_0_FN_SDEI_EVENT_DISABLE: + ret = hypercall_enable(vcpu, false); + break; default: ret = SDEI_NOT_SUPPORTED; } -- 2.23.0 _______________________________________________ kvmarm mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
