From: Ashish Kalra <Ashish.Kalra@amd.com>
To: pbonzini@redhat.com
Cc: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
rkrcmar@redhat.com, joro@8bytes.org, bp@suse.de,
thomas.lendacky@amd.com, x86@kernel.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, srutherford@google.com,
venu.busireddy@oracle.com, brijesh.singh@amd.com
Subject: [PATCH v9 03/18] KVM: SVM: Add KVM_SEV_SEND_FINISH command
Date: Tue, 8 Dec 2020 22:04:28 +0000 [thread overview]
Message-ID: <c868af4b0f4ab4e5797c31a0fbb117ddb6c2f6dd.1607460588.git.ashish.kalra@amd.com> (raw)
In-Reply-To: <cover.1607460588.git.ashish.kalra@amd.com>
From: Brijesh Singh <brijesh.singh@amd.com>
The command is used to finailize the encryption context created with
KVM_SEV_SEND_START command.
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: x86@kernel.org
Cc: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Steve Rutherford <srutherford@google.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
---
.../virt/kvm/amd-memory-encryption.rst | 8 +++++++
arch/x86/kvm/svm/sev.c | 23 +++++++++++++++++++
2 files changed, 31 insertions(+)
diff --git a/Documentation/virt/kvm/amd-memory-encryption.rst b/Documentation/virt/kvm/amd-memory-encryption.rst
index 8bed1d801558..0da0c199efa8 100644
--- a/Documentation/virt/kvm/amd-memory-encryption.rst
+++ b/Documentation/virt/kvm/amd-memory-encryption.rst
@@ -314,6 +314,14 @@ 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/sev.c b/arch/x86/kvm/svm/sev.c
index adfe2e53abf3..877780222378 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -1167,6 +1167,26 @@ 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;
+}
+
int svm_mem_enc_op(struct kvm *kvm, void __user *argp)
{
struct kvm_sev_cmd sev_cmd;
@@ -1217,6 +1237,9 @@ 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
next prev parent reply other threads:[~2020-12-08 22:06 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-08 22:02 [PATCH v9 00/18] Add AMD SEV guest live migration support Ashish Kalra
2020-12-08 22:03 ` [PATCH v9 01/18] KVM: SVM: Add KVM_SEV SEND_START command Ashish Kalra
2020-12-08 22:04 ` [PATCH v9 02/18] KVM: SVM: Add KVM_SEND_UPDATE_DATA command Ashish Kalra
2020-12-08 22:04 ` Ashish Kalra [this message]
2020-12-08 22:05 ` [PATCH v9 04/18] KVM: SVM: Add support for KVM_SEV_RECEIVE_START command Ashish Kalra
2020-12-08 22:05 ` [PATCH v9 05/18] KVM: SVM: Add KVM_SEV_RECEIVE_UPDATE_DATA command Ashish Kalra
2020-12-08 22:05 ` [PATCH v9 06/18] KVM: SVM: Add KVM_SEV_RECEIVE_FINISH command Ashish Kalra
2020-12-08 22:05 ` [PATCH v9 07/18] KVM: x86: Add AMD SEV specific Hypercall3 Ashish Kalra
2020-12-08 22:06 ` [PATCH v9 08/18] KVM: X86: Introduce KVM_HC_PAGE_ENC_STATUS hypercall Ashish Kalra
2020-12-08 22:06 ` [PATCH v9 09/18] KVM: x86: Introduce KVM_GET_PAGE_ENC_BITMAP ioctl Ashish Kalra
2020-12-08 22:06 ` [PATCH v9 10/18] mm: x86: Invoke hypercall when page encryption status is changed Ashish Kalra
2020-12-08 22:07 ` [PATCH v9 11/18] KVM: x86: Introduce KVM_SET_PAGE_ENC_BITMAP ioctl Ashish Kalra
2020-12-08 22:07 ` [PATCH v9 12/18] KVM: SVM: Add support for static allocation of unified Page Encryption Bitmap Ashish Kalra
2020-12-08 22:07 ` [PATCH v9 13/18] KVM: x86: Introduce new KVM_FEATURE_SEV_LIVE_MIGRATION feature & Custom MSR Ashish Kalra
2020-12-08 22:08 ` [PATCH v9 14/18] EFI: Introduce the new AMD Memory Encryption GUID Ashish Kalra
2020-12-08 22:08 ` [PATCH v9 15/18] KVM: x86: Add guest support for detecting and enabling SEV Live Migration feature Ashish Kalra
2020-12-08 22:08 ` [PATCH v9 16/18] KVM: x86: Mark _bss_decrypted section variables as decrypted in page encryption bitmap Ashish Kalra
2020-12-08 22:09 ` [PATCH v9 17/18] KVM: x86: Add kexec support for SEV Live Migration Ashish Kalra
2020-12-08 22:09 ` [PATCH v9 18/18] KVM: SVM: Bypass DBG_DECRYPT API calls for unecrypted guest memory Ashish Kalra
2021-01-15 0:31 ` [PATCH v9 00/18] Add AMD SEV guest live migration support Steve Rutherford
2021-01-15 1:16 ` Kalra, Ashish
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