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 16/21] KVM: arm64: Support SDEI ioctl commands on VM
Date: Sun, 15 Aug 2021 08:13:47 +0800 [thread overview]
Message-ID: <20210815001352.81927-17-gshan@redhat.com> (raw)
In-Reply-To: <20210815001352.81927-1-gshan@redhat.com>
This supports ioctl commands on VM to manage the various objects.
It's primarily used by VMM to accomplish live migration. The ioctl
commands introduced by this are highlighted as blow:
* KVM_SDEI_CMD_GET_VERSION
Retrieve the version of current implementation
* KVM_SDEI_CMD_SET_EVENT
Add event to be exported from KVM so that guest can register
against it afterwards
* KVM_SDEI_CMD_GET_KEVENT_COUNT
Retrieve number of registered SDEI events
* KVM_SDEI_CMD_GET_KEVENT
Retrieve the state of the registered SDEI event
* KVM_SDEI_CMD_SET_KEVENT
Populate the registered SDEI event
Signed-off-by: Gavin Shan <gshan@redhat.com>
---
arch/arm64/include/asm/kvm_sdei.h | 1 +
arch/arm64/include/uapi/asm/kvm_sdei.h | 17 +++
arch/arm64/kvm/arm.c | 3 +
arch/arm64/kvm/sdei.c | 171 +++++++++++++++++++++++++
include/uapi/linux/kvm.h | 3 +
5 files changed, 195 insertions(+)
diff --git a/arch/arm64/include/asm/kvm_sdei.h b/arch/arm64/include/asm/kvm_sdei.h
index 19f2d9b91f85..8f5ea947ed0e 100644
--- a/arch/arm64/include/asm/kvm_sdei.h
+++ b/arch/arm64/include/asm/kvm_sdei.h
@@ -125,6 +125,7 @@ int kvm_sdei_hypercall(struct kvm_vcpu *vcpu);
int kvm_sdei_register_notifier(struct kvm *kvm, unsigned long num,
kvm_sdei_notifier notifier);
void kvm_sdei_deliver(struct kvm_vcpu *vcpu);
+long kvm_sdei_vm_ioctl(struct kvm *kvm, unsigned long arg);
void kvm_sdei_destroy_vcpu(struct kvm_vcpu *vcpu);
void kvm_sdei_destroy_vm(struct kvm *kvm);
diff --git a/arch/arm64/include/uapi/asm/kvm_sdei.h b/arch/arm64/include/uapi/asm/kvm_sdei.h
index 4ef661d106fe..35ff05be3c28 100644
--- a/arch/arm64/include/uapi/asm/kvm_sdei.h
+++ b/arch/arm64/include/uapi/asm/kvm_sdei.h
@@ -57,5 +57,22 @@ struct kvm_sdei_vcpu_state {
struct kvm_sdei_vcpu_regs normal_regs;
};
+#define KVM_SDEI_CMD_GET_VERSION 0
+#define KVM_SDEI_CMD_SET_EVENT 1
+#define KVM_SDEI_CMD_GET_KEVENT_COUNT 2
+#define KVM_SDEI_CMD_GET_KEVENT 3
+#define KVM_SDEI_CMD_SET_KEVENT 4
+
+struct kvm_sdei_cmd {
+ __u32 cmd;
+ union {
+ __u32 version;
+ __u32 count;
+ __u64 num;
+ struct kvm_sdei_event_state kse_state;
+ struct kvm_sdei_kvm_event_state kske_state;
+ };
+};
+
#endif /* !__ASSEMBLY__ */
#endif /* _UAPI__ASM_KVM_SDEI_H */
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 0c3db1ef1ba9..8d61585124b2 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1389,6 +1389,9 @@ long kvm_arch_vm_ioctl(struct file *filp,
return -EFAULT;
return kvm_vm_ioctl_mte_copy_tags(kvm, ©_tags);
}
+ case KVM_ARM_SDEI_COMMAND: {
+ return kvm_sdei_vm_ioctl(kvm, arg);
+ }
default:
return -EINVAL;
}
diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c
index 5f7a37dcaa77..bdd76c3e5153 100644
--- a/arch/arm64/kvm/sdei.c
+++ b/arch/arm64/kvm/sdei.c
@@ -931,6 +931,177 @@ void kvm_sdei_create_vcpu(struct kvm_vcpu *vcpu)
vcpu->arch.sdei = vsdei;
}
+static long kvm_sdei_set_event(struct kvm *kvm,
+ struct kvm_sdei_event_state *kse_state)
+{
+ struct kvm_sdei_kvm *ksdei = kvm->arch.sdei;
+ struct kvm_sdei_event *kse = NULL;
+
+ if (!kvm_sdei_is_valid_event_num(kse_state->num))
+ return -EINVAL;
+
+ if (!(kse_state->type == SDEI_EVENT_TYPE_SHARED ||
+ kse_state->type == SDEI_EVENT_TYPE_PRIVATE))
+ return -EINVAL;
+
+ if (!(kse_state->priority == SDEI_EVENT_PRIORITY_NORMAL ||
+ kse_state->priority == SDEI_EVENT_PRIORITY_CRITICAL))
+ return -EINVAL;
+
+ kse = kvm_sdei_find_event(kvm, kse_state->num);
+ if (kse)
+ return -EEXIST;
+
+ kse = kzalloc(sizeof(*kse), GFP_KERNEL);
+ if (!kse)
+ return -ENOMEM;
+
+ kse->state = *kse_state;
+ kse->kvm = kvm;
+ list_add_tail(&kse->link, &ksdei->events);
+
+ return 0;
+}
+
+static long kvm_sdei_get_kevent_count(struct kvm *kvm, int *count)
+{
+ struct kvm_sdei_kvm *ksdei = kvm->arch.sdei;
+ struct kvm_sdei_kvm_event *kske = NULL;
+ int total = 0;
+
+ list_for_each_entry(kske, &ksdei->kvm_events, link) {
+ total++;
+ }
+
+ *count = total;
+ return 0;
+}
+
+static long kvm_sdei_get_kevent(struct kvm *kvm,
+ struct kvm_sdei_kvm_event_state *kske_state)
+{
+ struct kvm_sdei_kvm *ksdei = kvm->arch.sdei;
+ struct kvm_sdei_kvm_event *kske = NULL;
+
+ /*
+ * The first entry is fetched if the event number is invalid.
+ * Otherwise, the next entry is fetched.
+ */
+ if (!kvm_sdei_is_valid_event_num(kske_state->num)) {
+ kske = list_first_entry_or_null(&ksdei->kvm_events,
+ struct kvm_sdei_kvm_event, link);
+ } else {
+ kske = kvm_sdei_find_kvm_event(kvm, kske_state->num);
+ if (kske && !list_is_last(&kske->link, &ksdei->kvm_events))
+ kske = list_next_entry(kske, link);
+ else
+ kske = NULL;
+ }
+
+ if (!kske)
+ return -ENOENT;
+
+ *kske_state = kske->state;
+
+ return 0;
+}
+
+static long kvm_sdei_set_kevent(struct kvm *kvm,
+ struct kvm_sdei_kvm_event_state *kske_state)
+{
+ struct kvm_sdei_kvm *ksdei = kvm->arch.sdei;
+ struct kvm_sdei_event *kse = NULL;
+ struct kvm_sdei_kvm_event *kske = NULL;
+
+ /* Sanity check */
+ if (!kvm_sdei_is_valid_event_num(kske_state->num))
+ return -EINVAL;
+
+ if (!(kske_state->route_mode == SDEI_EVENT_REGISTER_RM_ANY ||
+ kske_state->route_mode == SDEI_EVENT_REGISTER_RM_PE))
+ return -EINVAL;
+
+ /* Check if the event number is valid */
+ kse = kvm_sdei_find_event(kvm, kske_state->num);
+ if (!kse)
+ return -ENOENT;
+
+ /* Check if the event has been populated */
+ kske = kvm_sdei_find_kvm_event(kvm, kske_state->num);
+ if (kske)
+ return -EEXIST;
+
+ kske = kzalloc(sizeof(*kske), GFP_KERNEL);
+ if (!kske)
+ return -ENOMEM;
+
+ kske->state = *kske_state;
+ kske->kse = kse;
+ kske->kvm = kvm;
+ list_add_tail(&kske->link, &ksdei->kvm_events);
+
+ return 0;
+}
+
+long kvm_sdei_vm_ioctl(struct kvm *kvm, unsigned long arg)
+{
+ struct kvm_sdei_kvm *ksdei = kvm->arch.sdei;
+ struct kvm_sdei_cmd *cmd = NULL;
+ void __user *argp = (void __user *)arg;
+ bool copy = false;
+ long ret = 0;
+
+ /* Sanity check */
+ if (!ksdei) {
+ ret = -EPERM;
+ goto out;
+ }
+
+ cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+ if (!cmd) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ if (copy_from_user(cmd, argp, sizeof(*cmd))) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ spin_lock(&ksdei->lock);
+
+ switch (cmd->cmd) {
+ case KVM_SDEI_CMD_GET_VERSION:
+ copy = true;
+ cmd->version = (1 << 16); /* v1.0.0 */
+ break;
+ case KVM_SDEI_CMD_SET_EVENT:
+ ret = kvm_sdei_set_event(kvm, &cmd->kse_state);
+ break;
+ case KVM_SDEI_CMD_GET_KEVENT_COUNT:
+ copy = true;
+ ret = kvm_sdei_get_kevent_count(kvm, &cmd->count);
+ break;
+ case KVM_SDEI_CMD_GET_KEVENT:
+ copy = true;
+ ret = kvm_sdei_get_kevent(kvm, &cmd->kske_state);
+ break;
+ case KVM_SDEI_CMD_SET_KEVENT:
+ ret = kvm_sdei_set_kevent(kvm, &cmd->kske_state);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ spin_unlock(&ksdei->lock);
+out:
+ if (!ret && copy && copy_to_user(argp, cmd, sizeof(*cmd)))
+ ret = -EFAULT;
+
+ kfree(cmd);
+ return ret;
+}
+
void kvm_sdei_destroy_vcpu(struct kvm_vcpu *vcpu)
{
struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei;
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index d9e4aabcb31a..8cf41fd4bf86 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1679,6 +1679,9 @@ struct kvm_xen_vcpu_attr {
#define KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_DATA 0x4
#define KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADJUST 0x5
+/* Available with KVM_CAP_ARM_SDEI */
+#define KVM_ARM_SDEI_COMMAND _IOWR(KVMIO, 0xce, struct kvm_sdei_cmd)
+
/* Secure Encrypted Virtualization command */
enum sev_cmd_id {
/* Guest initialization commands */
--
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 ` Gavin Shan [this message]
2021-11-10 13:48 ` [PATCH v4 16/21] KVM: arm64: Support SDEI ioctl commands on VM 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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