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[Qemu-devel] [RFC PATCH v1 03/10] KVM: SVM: Add KVM_SEV_SEND_FINISH comm
From: |
Singh, Brijesh |
Subject: |
[Qemu-devel] [RFC PATCH v1 03/10] KVM: SVM: Add KVM_SEV_SEND_FINISH command |
Date: |
Wed, 24 Apr 2019 16:10:02 +0000 |
The command is used to finailize the encryption context created with
KVM_SEV_SEND_START command.
Cc: Thomas Gleixner <address@hidden>
Cc: Ingo Molnar <address@hidden>
Cc: "H. Peter Anvin" <address@hidden>
Cc: Paolo Bonzini <address@hidden>
Cc: "Radim Krčmář" <address@hidden>
Cc: Joerg Roedel <address@hidden>
Cc: Borislav Petkov <address@hidden>
Cc: Tom Lendacky <address@hidden>
Cc: address@hidden
Cc: address@hidden
Cc: address@hidden
Signed-off-by: Brijesh Singh <address@hidden>
---
.../virtual/kvm/amd-memory-encryption.rst | 8 +++++++
arch/x86/kvm/svm.c | 23 +++++++++++++++++++
2 files changed, 31 insertions(+)
diff --git a/Documentation/virtual/kvm/amd-memory-encryption.rst
b/Documentation/virtual/kvm/amd-memory-encryption.rst
index a0208e171489..006832256ae3 100644
--- a/Documentation/virtual/kvm/amd-memory-encryption.rst
+++ b/Documentation/virtual/kvm/amd-memory-encryption.rst
@@ -285,6 +285,14 @@ Returns: 0 on success, -negative on error
__u32 trans_len;
};
+12. KVM_SEV_SEND_FINISH
+------------------------
+
+After completion of the migration flow, the KVM_SEV_SEND_FINISH command can be
+issued by the hypervisor to delete the encryption context.
+
+Returns: 0 on success, -negative on error
+
References
==========
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index a1cfd36d6195..263f3c7deae7 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -7172,6 +7172,26 @@ static int sev_send_update_data(struct kvm *kvm, struct
kvm_sev_cmd *argp)
return ret;
}
+static int sev_send_finish(struct kvm *kvm, struct kvm_sev_cmd *argp)
+{
+ struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
+ struct sev_data_send_finish *data;
+ int ret;
+
+ if (!sev_guest(kvm))
+ return -ENOTTY;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->handle = sev->handle;
+ ret = sev_issue_cmd(kvm, SEV_CMD_SEND_FINISH, data, &argp->error);
+
+ kfree(data);
+ return ret;
+}
+
static int svm_mem_enc_op(struct kvm *kvm, void __user *argp)
{
struct kvm_sev_cmd sev_cmd;
@@ -7219,6 +7239,9 @@ static int svm_mem_enc_op(struct kvm *kvm, void __user
*argp)
case KVM_SEV_SEND_UPDATE_DATA:
r = sev_send_update_data(kvm, &sev_cmd);
break;
+ case KVM_SEV_SEND_FINISH:
+ r = sev_send_finish(kvm, &sev_cmd);
+ break;
default:
r = -EINVAL;
goto out;
--
2.17.1
- [Qemu-devel] [RFC PATCH v1 09/10] KVM: x86: Introduce KVM_GET_PAGE_ENC_BITMAP ioctl, (continued)
- [Qemu-devel] [RFC PATCH v1 09/10] KVM: x86: Introduce KVM_GET_PAGE_ENC_BITMAP ioctl, Singh, Brijesh, 2019/04/24
- [Qemu-devel] [RFC PATCH v1 10/10] mm: x86: Invoke hypercall when page encryption status is changed, Singh, Brijesh, 2019/04/24
- [Qemu-devel] [RFC PATCH v1 02/10] KVM: SVM: Add KVM_SEND_UPDATE_DATA command, Singh, Brijesh, 2019/04/24
- [Qemu-devel] [RFC PATCH v1 04/10] KVM: SVM: Add support for KVM_SEV_RECEIVE_START command, Singh, Brijesh, 2019/04/24
- [Qemu-devel] [RFC PATCH v1 06/10] KVM: SVM: Add KVM_SEV_RECEIVE_FINISH command, Singh, Brijesh, 2019/04/24
- [Qemu-devel] [RFC PATCH v1 05/10] KVM: SVM: Add KVM_SEV_RECEIVE_UPDATE_DATA command, Singh, Brijesh, 2019/04/24
- [Qemu-devel] [RFC PATCH v1 03/10] KVM: SVM: Add KVM_SEV_SEND_FINISH command,
Singh, Brijesh <=
- [Qemu-devel] [RFC PATCH v1 07/10] KVM: x86: Add AMD SEV specific Hypercall3, Singh, Brijesh, 2019/04/24
- [Qemu-devel] [RFC PATCH v1 08/10] KVM: X86: Introduce KVM_HC_PAGE_ENC_STATUS hypercall, Singh, Brijesh, 2019/04/24
- Re: [Qemu-devel] [RFC PATCH v1 00/10] Add AMD SEV guest live migration support, Steve Rutherford, 2019/04/24