From: Gavin Shan <gshan@redhat.com>
To: kvmarm@lists.cs.columbia.edu
Cc: linux-kernel@vger.kernel.org, james.morse@arm.com,
mark.rutland@arm.com, Jonathan.Cameron@huawei.com,
will@kernel.org, maz@kernel.org, pbonzini@redhat.com
Subject: [PATCH v4 18/21] KVM: arm64: Support SDEI event injection
Date: Sun, 15 Aug 2021 08:13:49 +0800 [thread overview]
Message-ID: <20210815001352.81927-19-gshan@redhat.com> (raw)
In-Reply-To: <20210815001352.81927-1-gshan@redhat.com>
This supports SDEI event injection by implementing kvm_sdei_inject().
It's called by kernel directly or VMM through ioctl command to inject
SDEI event to the specific vCPU.
Signed-off-by: Gavin Shan <gshan@redhat.com>
---
arch/arm64/include/asm/kvm_sdei.h | 2 +
arch/arm64/include/uapi/asm/kvm_sdei.h | 1 +
arch/arm64/kvm/sdei.c | 108 +++++++++++++++++++++++++
3 files changed, 111 insertions(+)
diff --git a/arch/arm64/include/asm/kvm_sdei.h b/arch/arm64/include/asm/kvm_sdei.h
index a997989bab77..51087fe971ba 100644
--- a/arch/arm64/include/asm/kvm_sdei.h
+++ b/arch/arm64/include/asm/kvm_sdei.h
@@ -124,6 +124,8 @@ void kvm_sdei_create_vcpu(struct kvm_vcpu *vcpu);
int kvm_sdei_hypercall(struct kvm_vcpu *vcpu);
int kvm_sdei_register_notifier(struct kvm *kvm, unsigned long num,
kvm_sdei_notifier notifier);
+int kvm_sdei_inject(struct kvm_vcpu *vcpu,
+ unsigned long num, bool immediate);
void kvm_sdei_deliver(struct kvm_vcpu *vcpu);
long kvm_sdei_vm_ioctl(struct kvm *kvm, unsigned long arg);
long kvm_sdei_vcpu_ioctl(struct kvm_vcpu *vcpu, unsigned long arg);
diff --git a/arch/arm64/include/uapi/asm/kvm_sdei.h b/arch/arm64/include/uapi/asm/kvm_sdei.h
index b916c3435646..f7a6b2b22b50 100644
--- a/arch/arm64/include/uapi/asm/kvm_sdei.h
+++ b/arch/arm64/include/uapi/asm/kvm_sdei.h
@@ -67,6 +67,7 @@ struct kvm_sdei_vcpu_state {
#define KVM_SDEI_CMD_SET_VEVENT 7
#define KVM_SDEI_CMD_GET_VCPU_STATE 8
#define KVM_SDEI_CMD_SET_VCPU_STATE 9
+#define KVM_SDEI_CMD_INJECT_EVENT 10
struct kvm_sdei_cmd {
__u32 cmd;
diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c
index 79315b77f24b..7c2789cd1421 100644
--- a/arch/arm64/kvm/sdei.c
+++ b/arch/arm64/kvm/sdei.c
@@ -802,6 +802,111 @@ int kvm_sdei_register_notifier(struct kvm *kvm,
return ret;
}
+int kvm_sdei_inject(struct kvm_vcpu *vcpu,
+ unsigned long num,
+ bool immediate)
+{
+ 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;
+ struct kvm_sdei_vcpu_event *ksve = NULL;
+ int index, ret = 0;
+
+ /* Sanity check */
+ if (!(ksdei && vsdei)) {
+ ret = -EPERM;
+ goto out;
+ }
+
+ if (!kvm_sdei_is_valid_event_num(num)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* Check the kvm event */
+ spin_lock(&ksdei->lock);
+ kske = kvm_sdei_find_kvm_event(kvm, num);
+ if (!kske) {
+ ret = -ENOENT;
+ goto unlock_kvm;
+ }
+
+ kse = kske->kse;
+ index = (kse->state.type == SDEI_EVENT_TYPE_PRIVATE) ?
+ vcpu->vcpu_idx : 0;
+ if (!(kvm_sdei_is_registered(kske, index) &&
+ kvm_sdei_is_enabled(kske, index))) {
+ ret = -EPERM;
+ goto unlock_kvm;
+ }
+
+ /* Check the vcpu state */
+ spin_lock(&vsdei->lock);
+ if (vsdei->state.masked) {
+ ret = -EPERM;
+ goto unlock_vcpu;
+ }
+
+ /* Check if the event can be delivered immediately */
+ if (immediate) {
+ if (kse->state.priority == SDEI_EVENT_PRIORITY_CRITICAL &&
+ !list_empty(&vsdei->critical_events)) {
+ ret = -ENOSPC;
+ goto unlock_vcpu;
+ }
+
+ if (kse->state.priority == SDEI_EVENT_PRIORITY_NORMAL &&
+ (!list_empty(&vsdei->critical_events) ||
+ !list_empty(&vsdei->normal_events))) {
+ ret = -ENOSPC;
+ goto unlock_vcpu;
+ }
+ }
+
+ /* Check if the vcpu event exists */
+ ksve = kvm_sdei_find_vcpu_event(vcpu, num);
+ if (ksve) {
+ kske->state.refcount++;
+ ksve->state.refcount++;
+ kvm_make_request(KVM_REQ_SDEI, vcpu);
+ goto unlock_vcpu;
+ }
+
+ /* Allocate vcpu event */
+ ksve = kzalloc(sizeof(*ksve), GFP_KERNEL);
+ if (!ksve) {
+ ret = -ENOMEM;
+ goto unlock_vcpu;
+ }
+
+ /*
+ * We should take lock to update KVM event state because its
+ * reference count might be zero. In that case, the KVM event
+ * could be destroyed.
+ */
+ kske->state.refcount++;
+ ksve->state.num = num;
+ ksve->state.refcount = 1;
+ ksve->kske = kske;
+ ksve->vcpu = vcpu;
+
+ if (kse->state.priority == SDEI_EVENT_PRIORITY_CRITICAL)
+ list_add_tail(&ksve->link, &vsdei->critical_events);
+ else
+ list_add_tail(&ksve->link, &vsdei->normal_events);
+
+ kvm_make_request(KVM_REQ_SDEI, vcpu);
+
+unlock_vcpu:
+ spin_unlock(&vsdei->lock);
+unlock_kvm:
+ spin_unlock(&ksdei->lock);
+out:
+ return ret;
+}
+
void kvm_sdei_deliver(struct kvm_vcpu *vcpu)
{
struct kvm *kvm = vcpu->kvm;
@@ -1317,6 +1422,9 @@ long kvm_sdei_vcpu_ioctl(struct kvm_vcpu *vcpu, unsigned long arg)
case KVM_SDEI_CMD_SET_VCPU_STATE:
ret = kvm_sdei_set_vcpu_state(vcpu, &cmd->ksv_state);
break;
+ case KVM_SDEI_CMD_INJECT_EVENT:
+ ret = kvm_sdei_inject(vcpu, cmd->num, false);
+ break;
default:
ret = -EINVAL;
}
--
2.23.0
next prev parent reply other threads:[~2021-08-15 0:16 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
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 ` Gavin Shan [this message]
2021-11-10 14:05 ` [PATCH v4 18/21] KVM: arm64: Support SDEI event injection 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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