From: Gavin Shan <gshan@redhat.com>
To: Eric Auger <eauger@redhat.com>, kvmarm@lists.cs.columbia.edu
Cc: maz@kernel.org, linux-kernel@vger.kernel.org,
Jonathan.Cameron@huawei.com, pbonzini@redhat.com,
will@kernel.org
Subject: Re: [PATCH v4 08/21] KVM: arm64: Support SDEI_EVENT_STATUS hypercall
Date: Wed, 12 Jan 2022 10:40:57 +0800 [thread overview]
Message-ID: <c60845e3-0d98-2007-3461-2a707abe03cb@redhat.com> (raw)
In-Reply-To: <36f2f2cf-3e6e-30ce-53d2-6c44be93272d@redhat.com>
Hi Eric,
On 11/10/21 1:12 AM, Eric Auger wrote:
> On 8/15/21 2:13 AM, Gavin Shan wrote:
>> This supports SDEI_EVENT_STATUS hypercall. It's used by the guest
>> to retrieve a bitmap to indicate the SDEI event states, including
>> registration, enablement and delivery state.
>>
>> Signed-off-by: Gavin Shan <gshan@redhat.com>
>> ---
>> arch/arm64/kvm/sdei.c | 50 +++++++++++++++++++++++++++++++++++++++++++
>> 1 file changed, 50 insertions(+)
>>
>> diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c
>> index a3ba69dc91cb..b95b8c4455e1 100644
>> --- a/arch/arm64/kvm/sdei.c
>> +++ b/arch/arm64/kvm/sdei.c
>> @@ -367,6 +367,54 @@ static unsigned long kvm_sdei_hypercall_unregister(struct kvm_vcpu *vcpu)
>> return ret;
>> }
>>
>> +static unsigned long kvm_sdei_hypercall_status(struct kvm_vcpu *vcpu)
>> +{
>> + struct kvm *kvm = vcpu->kvm;
>> + struct kvm_sdei_kvm *ksdei = kvm->arch.sdei;
>> + struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei;
>> + struct kvm_sdei_event *kse = NULL;
>> + struct kvm_sdei_kvm_event *kske = NULL;
>> + unsigned long event_num = smccc_get_arg1(vcpu);
>> + int index = 0;
>> + unsigned long ret = SDEI_SUCCESS;
>> +
>> + /* Sanity check */
>> + if (!(ksdei && vsdei)) {
>> + ret = SDEI_NOT_SUPPORTED;
>> + goto out;
>> + }
>> +
>> + if (!kvm_sdei_is_valid_event_num(event_num)) {
>> + ret = SDEI_INVALID_PARAMETERS;
>> + goto out;
>> + }
> if we were to support bound events, I do not know if a given even num
> can disapper inbetween that check and the rest of the code, in which
> case a lock would be needed?
For the bound events, it's possbile. However, @ksdei->lock can be reused
in that cause. Anyway, it's something for future :)
>> +
>> + /*
>> + * Check if the KVM event exists. None of the flags
>> + * will be set if it doesn't exist.
>> + */
>> + spin_lock(&ksdei->lock);
>> + kske = kvm_sdei_find_kvm_event(kvm, event_num);
>> + if (!kske) {
>> + ret = 0;
>> + goto unlock;
>> + }
>> +
>> + index = (kse->state.type == SDEI_EVENT_TYPE_PRIVATE) ?
>> + vcpu->vcpu_idx : 0;
>> + if (kvm_sdei_is_registered(kske, index))
>> + ret |= (1UL << SDEI_EVENT_STATUS_REGISTERED);
>> + if (kvm_sdei_is_enabled(kske, index))
>> + ret |= (1UL << SDEI_EVENT_STATUS_ENABLED);
>> + if (kske->state.refcount)
>> + ret |= (1UL << SDEI_EVENT_STATUS_RUNNING);
>> +
>> +unlock:
>> + spin_unlock(&ksdei->lock);
>> +out:
>> + return ret;
>> +}
>> +
>> int kvm_sdei_hypercall(struct kvm_vcpu *vcpu)
>> {
>> u32 func = smccc_get_function(vcpu);
>> @@ -395,6 +443,8 @@ int kvm_sdei_hypercall(struct kvm_vcpu *vcpu)
>> ret = kvm_sdei_hypercall_unregister(vcpu);
>> break;
>> case SDEI_1_0_FN_SDEI_EVENT_STATUS:
>> + ret = kvm_sdei_hypercall_status(vcpu);
>> + break;
>> case SDEI_1_0_FN_SDEI_EVENT_GET_INFO:
>> case SDEI_1_0_FN_SDEI_EVENT_ROUTING_SET:
>> case SDEI_1_0_FN_SDEI_PE_MASK:
>>
Thanks,
Gavin
next prev parent reply other threads:[~2022-01-12 2:41 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-15 0:13 [PATCH v4 00/21] Support SDEI Virtualization Gavin Shan
2021-08-15 0:13 ` [PATCH v4 01/21] KVM: arm64: Introduce template for inline functions Gavin Shan
2021-11-09 15:26 ` Eric Auger
2022-01-11 7:52 ` Gavin Shan
2021-08-15 0:13 ` [PATCH v4 02/21] KVM: arm64: Add SDEI virtualization infrastructure Gavin Shan
2021-11-09 15:45 ` Eric Auger
2022-01-11 9:20 ` Gavin Shan
2022-01-27 13:17 ` Eric Auger
2022-01-11 9:40 ` Shannon Zhao
2022-01-13 7:09 ` Gavin Shan
2021-08-15 0:13 ` [PATCH v4 03/21] KVM: arm64: Support SDEI_VERSION hypercall Gavin Shan
2021-11-09 15:26 ` Eric Auger
2022-01-11 9:25 ` Gavin Shan
2021-08-15 0:13 ` [PATCH v4 04/21] KVM: arm64: Support SDEI_EVENT_REGISTER hypercall Gavin Shan
2021-11-09 15:50 ` Eric Auger
2022-01-12 2:19 ` Gavin Shan
2021-08-15 0:13 ` [PATCH v4 05/21] KVM: arm64: Support SDEI_EVENT_{ENABLE, DISABLE} hypercall Gavin Shan
2021-11-09 16:02 ` Eric Auger
2022-01-12 2:29 ` Gavin Shan
2022-01-25 18:23 ` Eric Auger
2021-08-15 0:13 ` [PATCH v4 06/21] KVM: arm64: Support SDEI_EVENT_CONTEXT hypercall Gavin Shan
2021-11-10 11:16 ` Eric Auger
2022-01-12 2:33 ` Gavin Shan
2022-01-25 18:29 ` Eric Auger
2022-01-11 9:43 ` Shannon Zhao
2022-01-13 7:02 ` Gavin Shan
2022-01-13 7:13 ` Gavin Shan
2022-01-25 18:32 ` Eric Auger
2022-01-25 18:31 ` Eric Auger
2021-08-15 0:13 ` [PATCH v4 07/21] KVM: arm64: Support SDEI_EVENT_UNREGISTER hypercall Gavin Shan
2021-11-09 17:05 ` Eric Auger
2022-01-12 2:38 ` Gavin Shan
2022-01-25 18:42 ` Eric Auger
2021-08-15 0:13 ` [PATCH v4 08/21] KVM: arm64: Support SDEI_EVENT_STATUS hypercall Gavin Shan
2021-11-09 17:12 ` Eric Auger
2022-01-12 2:40 ` Gavin Shan [this message]
2021-08-15 0:13 ` [PATCH v4 09/21] KVM: arm64: Support SDEI_EVENT_GET_INFO hypercall Gavin Shan
2021-11-09 17:19 ` Eric Auger
2022-01-12 2:46 ` Gavin Shan
2022-01-27 14:19 ` Eric Auger
2021-08-15 0:13 ` [PATCH v4 10/21] KVM: arm64: Support SDEI_EVENT_ROUTING_SET hypercall Gavin Shan
2021-11-09 18:47 ` Eric Auger
2022-01-12 2:54 ` Gavin Shan
2022-01-27 14:13 ` Eric Auger
2021-08-15 0:13 ` [PATCH v4 11/21] KVM: arm64: Support SDEI_PE_{MASK, UNMASK} hypercall Gavin Shan
2021-11-09 20:31 ` Eric Auger
2022-01-12 2:58 ` Gavin Shan
2021-08-15 0:13 ` [PATCH v4 12/21] KVM: arm64: Support SDEI_{PRIVATE, SHARED}_RESET hypercall Gavin Shan
2021-11-09 20:37 ` Eric Auger
2022-01-12 3:01 ` Gavin Shan
2021-08-15 0:13 ` [PATCH v4 13/21] KVM: arm64: Impment SDEI event delivery Gavin Shan
2021-11-10 10:58 ` Eric Auger
2022-01-12 6:34 ` Gavin Shan
2021-08-15 0:13 ` [PATCH v4 14/21] KVM: arm64: Support SDEI_EVENT_{COMPLETE, COMPLETE_AND_RESUME} hypercall Gavin Shan
2021-11-10 10:58 ` Eric Auger
2022-01-12 6:43 ` Gavin Shan
2022-01-27 14:47 ` Eric Auger
2022-01-27 15:20 ` Eric Auger
2021-08-15 0:13 ` [PATCH v4 15/21] KVM: arm64: Support SDEI event notifier Gavin Shan
2021-11-10 11:35 ` Eric Auger
2022-01-12 6:48 ` Gavin Shan
2021-08-15 0:13 ` [PATCH v4 16/21] KVM: arm64: Support SDEI ioctl commands on VM Gavin Shan
2021-11-10 13:48 ` Eric Auger
2022-01-12 7:03 ` Gavin Shan
2022-01-27 13:48 ` Eric Auger
2021-08-15 0:13 ` [PATCH v4 17/21] KVM: arm64: Support SDEI ioctl commands on vCPU Gavin Shan
2021-08-15 0:13 ` [PATCH v4 18/21] KVM: arm64: Support SDEI event injection Gavin Shan
2021-11-10 14:05 ` Eric Auger
2022-01-12 7:12 ` Gavin Shan
2021-08-15 0:13 ` [PATCH v4 19/21] KVM: arm64: Support SDEI event cancellation Gavin Shan
2021-11-10 14:09 ` Eric Auger
2022-01-12 7:19 ` Gavin Shan
2021-08-15 0:13 ` [PATCH v4 20/21] KVM: arm64: Export SDEI capability Gavin Shan
2021-11-10 13:55 ` Eric Auger
2022-01-12 7:20 ` Gavin Shan
2021-08-15 0:13 ` [PATCH v4 21/21] KVM: selftests: Add SDEI test case Gavin Shan
2021-08-15 0:19 ` [PATCH v4 00/21] Support SDEI Virtualization Gavin Shan
2021-11-10 14:29 ` Eric Auger
2022-01-12 7:24 ` Gavin Shan
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