From: Gavin Shan <gshan@redhat.com> To: kvmarm@lists.cs.columbia.edu Cc: maz@kernel.org, linux-kernel@vger.kernel.org, eauger@redhat.com, shan.gavin@gmail.com, Jonathan.Cameron@huawei.com, pbonzini@redhat.com, vkuznets@redhat.com, will@kernel.org Subject: [PATCH v5 04/22] KVM: arm64: Support SDEI_EVENT_REGISTER hypercall Date: Tue, 22 Mar 2022 16:06:52 +0800 [thread overview] Message-ID: <20220322080710.51727-5-gshan@redhat.com> (raw) In-Reply-To: <20220322080710.51727-1-gshan@redhat.com> This supports SDEI_EVENT_REGISTER hypercall, which is used by guest to register SDEI events. The SDEI event won't be raised until it's registered and enabled explicitly. Only the exposed events can be registered. For shared event, the registered event instance is created. However, the instance may be not created for the private events. Signed-off-by: Gavin Shan <gshan@redhat.com> --- arch/arm64/kvm/sdei.c | 128 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 128 insertions(+) diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c index 5a3a64cd6e84..2458dc666445 100644 --- a/arch/arm64/kvm/sdei.c +++ b/arch/arm64/kvm/sdei.c @@ -14,6 +14,35 @@ #include <kvm/arm_hypercalls.h> #include <asm/kvm_sdei.h> +static struct kvm_sdei_exposed_event * +find_exposed_event(struct kvm *kvm, unsigned long num) +{ + struct kvm_sdei_kvm *ksdei = kvm->arch.sdei; + struct kvm_sdei_exposed_event *exposed_event; + + list_for_each_entry(exposed_event, &ksdei->exposed_events, link) { + if (exposed_event->state.num == num) + return exposed_event; + } + + return NULL; +} + +static struct kvm_sdei_registered_event * +find_registered_event(struct kvm *kvm, unsigned long num) +{ + struct kvm_sdei_kvm *ksdei = kvm->arch.sdei; + struct kvm_sdei_registered_event *registered_event; + + list_for_each_entry(registered_event, + &ksdei->registered_events, link) { + if (registered_event->state.num == num) + return registered_event; + } + + return NULL; +} + static void remove_all_exposed_events(struct kvm *kvm) { struct kvm_sdei_kvm *ksdei = kvm->arch.sdei; @@ -126,6 +155,103 @@ static unsigned long hypercall_version(struct kvm_vcpu *vcpu) 0x4b564d; } +static unsigned long hypercall_register(struct kvm_vcpu *vcpu) +{ + struct kvm *kvm = vcpu->kvm; + struct kvm_sdei_kvm *ksdei = kvm->arch.sdei; + struct kvm_sdei_exposed_event *exposed_event; + struct kvm_sdei_registered_event *registered_event; + unsigned long event_num = smccc_get_arg1(vcpu); + unsigned long event_ep_address = smccc_get_arg2(vcpu); + unsigned long event_ep_arg = smccc_get_arg3(vcpu); + unsigned long route_mode = smccc_get_arg4(vcpu); + unsigned long route_affinity = smccc_get_arg5(vcpu); + int index; + unsigned long ret = SDEI_SUCCESS; + + if (!kvm_sdei_is_supported(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; + } + + spin_lock(&ksdei->lock); + + /* + * The registered event could have been existing if it's a private + * one. We needn't to create another registered event instance + * in this case. + */ + registered_event = find_registered_event(kvm, event_num); + if (registered_event) { + exposed_event = registered_event->exposed_event; + index = kvm_sdei_vcpu_index(vcpu, exposed_event); + if (kvm_sdei_is_registered(registered_event, index) || + kvm_sdei_is_unregister_pending(registered_event, index)) { + ret = SDEI_DENIED; + goto unlock; + } + + registered_event->state.route_mode = route_mode; + registered_event->state.route_affinity = route_affinity; + registered_event->state.ep_address[index] = event_ep_address; + registered_event->state.ep_arg[index] = event_ep_arg; + kvm_sdei_set_registered(registered_event, index); + goto unlock; + } + + /* Check if the exposed event exists */ + exposed_event = find_exposed_event(kvm, event_num); + if (!exposed_event) { + ret = SDEI_INVALID_PARAMETERS; + goto unlock; + } + + /* + * Check if the count of registered event instances exceeds + * the limit. + */ + if (ksdei->registered_event_count >= KVM_SDEI_MAX_EVENTS) { + ret = SDEI_OUT_OF_RESOURCE; + goto unlock; + } + + /* Allocate the registered event instance */ + registered_event = kzalloc(sizeof(*registered_event), + GFP_KERNEL_ACCOUNT); + if (!registered_event) { + ret = SDEI_OUT_OF_RESOURCE; + goto unlock; + } + + /* Initialize the registered event state */ + index = kvm_sdei_vcpu_index(vcpu, exposed_event); + registered_event->state.num = event_num; + registered_event->state.route_mode = route_affinity; + registered_event->state.route_affinity = route_affinity; + registered_event->state.ep_address[index] = event_ep_address; + registered_event->state.ep_arg[index] = event_ep_arg; + registered_event->kvm = kvm; + registered_event->exposed_event = exposed_event; + registered_event->vcpu_event_count = 0; + kvm_sdei_set_registered(registered_event, index); + + /* Add the registered event instance */ + ksdei->registered_event_count++; + exposed_event->registered_event_count++; + list_add_tail(®istered_event->link, &ksdei->registered_events); + +unlock: + spin_unlock(&ksdei->lock); +out: + return ret; +} + int kvm_sdei_hypercall(struct kvm_vcpu *vcpu) { struct kvm *kvm = vcpu->kvm; @@ -153,6 +279,8 @@ int kvm_sdei_hypercall(struct kvm_vcpu *vcpu) ret = hypercall_version(vcpu); break; case SDEI_1_0_FN_SDEI_EVENT_REGISTER: + ret = hypercall_register(vcpu); + break; case SDEI_1_0_FN_SDEI_EVENT_ENABLE: case SDEI_1_0_FN_SDEI_EVENT_DISABLE: case SDEI_1_0_FN_SDEI_EVENT_CONTEXT: -- 2.23.0 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
WARNING: multiple messages have this Message-ID (diff)
From: Gavin Shan <gshan@redhat.com> To: kvmarm@lists.cs.columbia.edu Cc: linux-kernel@vger.kernel.org, eauger@redhat.com, shannon.zhaosl@gmail.com, maz@kernel.org, Jonathan.Cameron@huawei.com, will@kernel.org, pbonzini@redhat.com, james.morse@arm.com, mark.rutland@arm.com, drjones@redhat.com, vkuznets@redhat.com, shan.gavin@gmail.com Subject: [PATCH v5 04/22] KVM: arm64: Support SDEI_EVENT_REGISTER hypercall Date: Tue, 22 Mar 2022 16:06:52 +0800 [thread overview] Message-ID: <20220322080710.51727-5-gshan@redhat.com> (raw) In-Reply-To: <20220322080710.51727-1-gshan@redhat.com> This supports SDEI_EVENT_REGISTER hypercall, which is used by guest to register SDEI events. The SDEI event won't be raised until it's registered and enabled explicitly. Only the exposed events can be registered. For shared event, the registered event instance is created. However, the instance may be not created for the private events. Signed-off-by: Gavin Shan <gshan@redhat.com> --- arch/arm64/kvm/sdei.c | 128 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 128 insertions(+) diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c index 5a3a64cd6e84..2458dc666445 100644 --- a/arch/arm64/kvm/sdei.c +++ b/arch/arm64/kvm/sdei.c @@ -14,6 +14,35 @@ #include <kvm/arm_hypercalls.h> #include <asm/kvm_sdei.h> +static struct kvm_sdei_exposed_event * +find_exposed_event(struct kvm *kvm, unsigned long num) +{ + struct kvm_sdei_kvm *ksdei = kvm->arch.sdei; + struct kvm_sdei_exposed_event *exposed_event; + + list_for_each_entry(exposed_event, &ksdei->exposed_events, link) { + if (exposed_event->state.num == num) + return exposed_event; + } + + return NULL; +} + +static struct kvm_sdei_registered_event * +find_registered_event(struct kvm *kvm, unsigned long num) +{ + struct kvm_sdei_kvm *ksdei = kvm->arch.sdei; + struct kvm_sdei_registered_event *registered_event; + + list_for_each_entry(registered_event, + &ksdei->registered_events, link) { + if (registered_event->state.num == num) + return registered_event; + } + + return NULL; +} + static void remove_all_exposed_events(struct kvm *kvm) { struct kvm_sdei_kvm *ksdei = kvm->arch.sdei; @@ -126,6 +155,103 @@ static unsigned long hypercall_version(struct kvm_vcpu *vcpu) 0x4b564d; } +static unsigned long hypercall_register(struct kvm_vcpu *vcpu) +{ + struct kvm *kvm = vcpu->kvm; + struct kvm_sdei_kvm *ksdei = kvm->arch.sdei; + struct kvm_sdei_exposed_event *exposed_event; + struct kvm_sdei_registered_event *registered_event; + unsigned long event_num = smccc_get_arg1(vcpu); + unsigned long event_ep_address = smccc_get_arg2(vcpu); + unsigned long event_ep_arg = smccc_get_arg3(vcpu); + unsigned long route_mode = smccc_get_arg4(vcpu); + unsigned long route_affinity = smccc_get_arg5(vcpu); + int index; + unsigned long ret = SDEI_SUCCESS; + + if (!kvm_sdei_is_supported(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; + } + + spin_lock(&ksdei->lock); + + /* + * The registered event could have been existing if it's a private + * one. We needn't to create another registered event instance + * in this case. + */ + registered_event = find_registered_event(kvm, event_num); + if (registered_event) { + exposed_event = registered_event->exposed_event; + index = kvm_sdei_vcpu_index(vcpu, exposed_event); + if (kvm_sdei_is_registered(registered_event, index) || + kvm_sdei_is_unregister_pending(registered_event, index)) { + ret = SDEI_DENIED; + goto unlock; + } + + registered_event->state.route_mode = route_mode; + registered_event->state.route_affinity = route_affinity; + registered_event->state.ep_address[index] = event_ep_address; + registered_event->state.ep_arg[index] = event_ep_arg; + kvm_sdei_set_registered(registered_event, index); + goto unlock; + } + + /* Check if the exposed event exists */ + exposed_event = find_exposed_event(kvm, event_num); + if (!exposed_event) { + ret = SDEI_INVALID_PARAMETERS; + goto unlock; + } + + /* + * Check if the count of registered event instances exceeds + * the limit. + */ + if (ksdei->registered_event_count >= KVM_SDEI_MAX_EVENTS) { + ret = SDEI_OUT_OF_RESOURCE; + goto unlock; + } + + /* Allocate the registered event instance */ + registered_event = kzalloc(sizeof(*registered_event), + GFP_KERNEL_ACCOUNT); + if (!registered_event) { + ret = SDEI_OUT_OF_RESOURCE; + goto unlock; + } + + /* Initialize the registered event state */ + index = kvm_sdei_vcpu_index(vcpu, exposed_event); + registered_event->state.num = event_num; + registered_event->state.route_mode = route_affinity; + registered_event->state.route_affinity = route_affinity; + registered_event->state.ep_address[index] = event_ep_address; + registered_event->state.ep_arg[index] = event_ep_arg; + registered_event->kvm = kvm; + registered_event->exposed_event = exposed_event; + registered_event->vcpu_event_count = 0; + kvm_sdei_set_registered(registered_event, index); + + /* Add the registered event instance */ + ksdei->registered_event_count++; + exposed_event->registered_event_count++; + list_add_tail(®istered_event->link, &ksdei->registered_events); + +unlock: + spin_unlock(&ksdei->lock); +out: + return ret; +} + int kvm_sdei_hypercall(struct kvm_vcpu *vcpu) { struct kvm *kvm = vcpu->kvm; @@ -153,6 +279,8 @@ int kvm_sdei_hypercall(struct kvm_vcpu *vcpu) ret = hypercall_version(vcpu); break; case SDEI_1_0_FN_SDEI_EVENT_REGISTER: + ret = hypercall_register(vcpu); + break; case SDEI_1_0_FN_SDEI_EVENT_ENABLE: case SDEI_1_0_FN_SDEI_EVENT_DISABLE: case SDEI_1_0_FN_SDEI_EVENT_CONTEXT: -- 2.23.0
next prev parent reply other threads:[~2022-03-22 8:08 UTC|newest] Thread overview: 98+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-03-22 8:06 [PATCH v5 00/22] Support SDEI Virtualization Gavin Shan 2022-03-22 8:06 ` Gavin Shan 2022-03-22 8:06 ` [PATCH v5 01/22] KVM: arm64: Introduce template for inline functions Gavin Shan 2022-03-22 8:06 ` Gavin Shan 2022-03-22 19:42 ` Oliver Upton 2022-03-22 19:42 ` Oliver Upton 2022-03-23 12:16 ` Gavin Shan 2022-03-23 12:16 ` Gavin Shan 2022-03-22 8:06 ` [PATCH v5 02/22] KVM: arm64: Add SDEI virtualization infrastructure Gavin Shan 2022-03-22 8:06 ` Gavin Shan 2022-03-22 22:43 ` Oliver Upton 2022-03-22 22:43 ` Oliver Upton 2022-03-23 12:40 ` Gavin Shan 2022-03-23 12:40 ` Gavin Shan 2022-03-23 17:11 ` Oliver Upton 2022-03-23 17:11 ` Oliver Upton 2022-03-24 6:54 ` Gavin Shan 2022-03-24 6:54 ` Gavin Shan 2022-03-24 9:04 ` Oliver Upton 2022-03-24 9:04 ` Oliver Upton 2022-03-25 6:07 ` Gavin Shan 2022-03-25 6:07 ` Gavin Shan 2022-03-22 8:06 ` [PATCH v5 03/22] KVM: arm64: Support SDEI_VERSION hypercall Gavin Shan 2022-03-22 8:06 ` Gavin Shan 2022-03-22 18:04 ` Oliver Upton 2022-03-22 18:04 ` Oliver Upton 2022-03-23 12:46 ` Gavin Shan 2022-03-23 12:46 ` Gavin Shan 2022-03-23 16:31 ` Oliver Upton 2022-03-23 16:31 ` Oliver Upton 2022-03-24 4:07 ` Gavin Shan 2022-03-24 4:07 ` Gavin Shan 2022-03-24 7:48 ` Oliver Upton 2022-03-24 7:48 ` Oliver Upton 2022-03-25 6:11 ` Gavin Shan 2022-03-25 6:11 ` Gavin Shan 2022-03-22 8:06 ` Gavin Shan [this message] 2022-03-22 8:06 ` [PATCH v5 04/22] KVM: arm64: Support SDEI_EVENT_REGISTER hypercall Gavin Shan 2022-03-22 8:06 ` [PATCH v5 05/22] KVM: arm64: Support SDEI_EVENT_{ENABLE, DISABLE} hypercall Gavin Shan 2022-03-22 8:06 ` Gavin Shan 2022-03-22 8:06 ` [PATCH v5 06/22] KVM: arm64: Support SDEI_EVENT_CONTEXT hypercall Gavin Shan 2022-03-22 8:06 ` Gavin Shan 2022-03-22 8:06 ` [PATCH v5 07/22] KVM: arm64: Support SDEI_EVENT_UNREGISTER hypercall Gavin Shan 2022-03-22 8:06 ` Gavin Shan 2022-03-22 8:06 ` [PATCH v5 08/22] KVM: arm64: Support SDEI_EVENT_STATUS hypercall Gavin Shan 2022-03-22 8:06 ` Gavin Shan 2022-03-22 8:06 ` [PATCH v5 09/22] KVM: arm64: Support SDEI_EVENT_GET_INFO hypercall Gavin Shan 2022-03-22 8:06 ` Gavin Shan 2022-03-22 8:06 ` [PATCH v5 10/22] KVM: arm64: Support SDEI_EVENT_ROUTING_SET hypercall Gavin Shan 2022-03-22 8:06 ` Gavin Shan 2022-03-22 8:06 ` [PATCH v5 11/22] KVM: arm64: Support SDEI_PE_{MASK, UNMASK} hypercall Gavin Shan 2022-03-22 8:06 ` Gavin Shan 2022-03-22 8:07 ` [PATCH v5 12/22] KVM: arm64: Support SDEI_{PRIVATE, SHARED}_RESET Gavin Shan 2022-03-22 8:07 ` Gavin Shan 2022-03-22 8:07 ` [PATCH v5 13/22] KVM: arm64: Support SDEI_FEATURES hypercall Gavin Shan 2022-03-22 8:07 ` Gavin Shan 2022-03-22 8:07 ` [PATCH v5 14/22] KVM: arm64: Support SDEI event injection, delivery and cancellation Gavin Shan 2022-03-22 8:07 ` Gavin Shan 2022-03-22 8:07 ` [PATCH v5 15/22] KVM: arm64: Support SDEI_EVENT_SIGNAL hypercall Gavin Shan 2022-03-22 8:07 ` Gavin Shan 2022-03-22 23:06 ` Oliver Upton 2022-03-22 23:06 ` Oliver Upton 2022-03-23 12:52 ` Gavin Shan 2022-03-23 12:52 ` Gavin Shan 2022-03-22 8:07 ` [PATCH v5 16/22] KVM: arm64: Support SDEI_EVENT_{COMPLETE,COMPLETE_AND_RESUME} hypercall Gavin Shan 2022-03-22 8:07 ` [PATCH v5 16/22] KVM: arm64: Support SDEI_EVENT_{COMPLETE, COMPLETE_AND_RESUME} hypercall Gavin Shan 2022-03-22 8:07 ` [PATCH v5 17/22] KVM: arm64: Support SDEI event notifier Gavin Shan 2022-03-22 8:07 ` Gavin Shan 2022-03-22 8:07 ` [PATCH v5 18/22] KVM: arm64: Support SDEI ioctl commands on VM Gavin Shan 2022-03-22 8:07 ` Gavin Shan 2022-03-23 17:28 ` Oliver Upton 2022-03-23 17:28 ` Oliver Upton 2022-03-25 6:59 ` Gavin Shan 2022-03-25 6:59 ` Gavin Shan 2022-03-25 7:35 ` Oliver Upton 2022-03-25 7:35 ` Oliver Upton 2022-03-25 10:14 ` Gavin Shan 2022-03-25 10:14 ` Gavin Shan 2022-03-22 8:07 ` [PATCH v5 19/22] KVM: arm64: Support SDEI ioctl commands on vCPU Gavin Shan 2022-03-22 8:07 ` Gavin Shan 2022-03-23 17:55 ` Oliver Upton 2022-03-23 17:55 ` Oliver Upton 2022-03-25 7:59 ` Gavin Shan 2022-03-25 7:59 ` Gavin Shan 2022-03-25 8:37 ` Oliver Upton 2022-03-25 8:37 ` Oliver Upton 2022-03-25 10:23 ` Gavin Shan 2022-03-25 10:23 ` Gavin Shan 2022-03-22 8:07 ` [PATCH v5 20/22] KVM: arm64: Export SDEI capability Gavin Shan 2022-03-22 8:07 ` Gavin Shan 2022-03-22 8:07 ` [PATCH v5 21/22] KVM: arm64: Add SDEI document Gavin Shan 2022-03-22 8:07 ` Gavin Shan 2022-03-22 8:07 ` [PATCH v5 22/22] KVM: selftests: Add SDEI test case Gavin Shan 2022-03-22 8:07 ` Gavin Shan 2022-03-22 18:13 ` [PATCH v5 00/22] Support SDEI Virtualization Oliver Upton 2022-03-22 18:13 ` Oliver Upton 2022-03-23 12:57 ` Gavin Shan 2022-03-23 12:57 ` Gavin Shan
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