Messages in this thread Patch in this message | | | From | Gavin Shan <> | Subject | [PATCH v7 08/22] KVM: arm64: Support EVENT_STATUS hypercall | Date | Fri, 27 May 2022 16:02:39 +0800 |
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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@redhat.com> --- 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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