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From 9211cc7af177176a5e4f9779098eef8e063152fa Mon Sep 17 00:00:00 2001
From: Brijesh Singh <brijesh.singh@amd.com>
Date: Mon, 4 Dec 2017 10:57:37 -0600
Subject: [PATCH 77/95] KVM: SVM: Add support for SEV GUEST_STATUS command
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
The command is used for querying the SEV guest information.
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
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Sudheesh Mavila <sudheesh.mavila@amd.com>
---
arch/x86/kvm/svm.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index a597efc..f9eb8fa 100755
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -6239,6 +6239,36 @@ static int sev_launch_finish(struct kvm *kvm, struct kvm_sev_cmd *argp)
return ret;
}
+static int sev_guest_status(struct kvm *kvm, struct kvm_sev_cmd *argp)
+{
+ struct kvm_sev_info *sev = &kvm->arch.sev_info;
+ struct kvm_sev_guest_status params;
+ struct sev_data_guest_status *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_GUEST_STATUS, data, &argp->error);
+ if (ret)
+ goto e_free;
+
+ params.policy = data->policy;
+ params.state = data->state;
+ params.handle = data->handle;
+
+ if (copy_to_user((void __user *)(uintptr_t)argp->data, ¶ms, sizeof(params)))
+ ret = -EFAULT;
+e_free:
+ kfree(data);
+ return ret;
+}
+
static int svm_mem_enc_op(struct kvm *kvm, void __user *argp)
{
struct kvm_sev_cmd sev_cmd;
@@ -6268,6 +6298,9 @@ static int svm_mem_enc_op(struct kvm *kvm, void __user *argp)
case KVM_SEV_LAUNCH_FINISH:
r = sev_launch_finish(kvm, &sev_cmd);
break;
+ case KVM_SEV_GUEST_STATUS:
+ r = sev_guest_status(kvm, &sev_cmd);
+ break;
default:
r = -EINVAL;
goto out;
--
2.7.4
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