linux-kernel - [RFC Part2 PATCH v3 19/26] KVM: svm: Add support for SEV GUEST

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20170724200303.12197-20-brijesh.singh@amd.com>
Date:   Mon, 24 Jul 2017 15:02:56 -0500
From:   Brijesh Singh <brijesh.singh@....com>
To:     linux-kernel@...r.kernel.org, x86@...nel.org, kvm@...r.kernel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>, Borislav Petkov <bp@...e.de>,
        Joerg Roedel <joro@...tes.org>,
        "Michael S . Tsirkin" <mst@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        \"Radim Krčmář\" 
        <rkrcmar@...hat.com>, Tom Lendacky <thomas.lendacky@....com>,
        Brijesh Singh <brijesh.singh@....com>
Subject: [RFC Part2 PATCH v3 19/26] KVM: svm: Add support for SEV GUEST_STATUS command

The command is used for querying the SEV guest status.

Signed-off-by: Brijesh Singh <brijesh.singh@....com>
---
 arch/x86/kvm/svm.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 7a77197..21f85e1 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -6024,6 +6024,40 @@ 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_guest_status params;
+	struct sev_data_guest_status *data;
+	int ret;
+
+	if (!sev_guest(kvm))
+		return -ENOTTY;
+
+	if (copy_from_user(&params, (void *) argp->data,
+				sizeof(struct kvm_sev_guest_status)))
+		return -EFAULT;
+
+	data = kzalloc(sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->handle = sev_get_handle(kvm);
+	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 *) argp->data, &params,
+				sizeof(struct kvm_sev_guest_status)))
+		ret = -EFAULT;
+e_free:
+	kfree(data);
+	return ret;
+}
+
 static int svm_memory_encryption_op(struct kvm *kvm, void __user *argp)
 {
 	struct kvm_sev_cmd sev_cmd;
@@ -6055,6 +6089,10 @@ static int svm_memory_encryption_op(struct kvm *kvm, void __user *argp)
 		r = sev_launch_finish(kvm, &sev_cmd);
 		break;
 	}
+	case KVM_SEV_GUEST_STATUS: {
+		r = sev_guest_status(kvm, &sev_cmd);
+		break;
+	}
 	default:
 		break;
 	}
-- 
2.9.4