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Message-ID: <20190710201244.25195-7-brijesh.singh@amd.com>
Date: Wed, 10 Jul 2019 20:13:07 +0000
From: "Singh, Brijesh" <brijesh.singh@....com>
To: "kvm@...r.kernel.org" <kvm@...r.kernel.org>
CC: "Singh, Brijesh" <brijesh.singh@....com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>,
Paolo Bonzini <pbonzini@...hat.com>,
Radim Krčmář <rkrcmar@...hat.com>,
Joerg Roedel <joro@...tes.org>, Borislav Petkov <bp@...e.de>,
"Lendacky, Thomas" <Thomas.Lendacky@....com>,
"x86@...nel.org" <x86@...nel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH v3 06/11] KVM: SVM: Add KVM_SEV_RECEIVE_FINISH command
The command finalize the guest receiving process and make the SEV guest
ready for the execution.
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Paolo Bonzini <pbonzini@...hat.com>
Cc: "Radim Krčmář" <rkrcmar@...hat.com>
Cc: Joerg Roedel <joro@...tes.org>
Cc: Borislav Petkov <bp@...e.de>
Cc: Tom Lendacky <thomas.lendacky@....com>
Cc: x86@...nel.org
Cc: kvm@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Brijesh Singh <brijesh.singh@....com>
---
.../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 f0ec0cbe2aaf..b3319f0221ee 100644
--- a/Documentation/virtual/kvm/amd-memory-encryption.rst
+++ b/Documentation/virtual/kvm/amd-memory-encryption.rst
@@ -350,6 +350,14 @@ Returns: 0 on success, -negative on error
__u32 trans_len;
};
+15. KVM_SEV_RECEIVE_FINISH
+------------------------
+
+After completion of the migration flow, the KVM_SEV_RECEIVE_FINISH command can be
+issued by the hypervisor to make the guest ready for execution.
+
+Returns: 0 on success, -negative on error
+
References
==========
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index ea084716f966..3089942f6630 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -7337,6 +7337,26 @@ static int sev_receive_update_data(struct kvm *kvm, struct kvm_sev_cmd *argp)
return ret;
}
+static int sev_receive_finish(struct kvm *kvm, struct kvm_sev_cmd *argp)
+{
+ struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
+ struct sev_data_receive_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_RECEIVE_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;
@@ -7393,6 +7413,9 @@ static int svm_mem_enc_op(struct kvm *kvm, void __user *argp)
case KVM_SEV_RECEIVE_UPDATE_DATA:
r = sev_receive_update_data(kvm, &sev_cmd);
break;
+ case KVM_SEV_RECEIVE_FINISH:
+ r = sev_receive_finish(kvm, &sev_cmd);
+ break;
default:
r = -EINVAL;
goto out;
--
2.17.1
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