| 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
| ||
|
Date: Fri, 29 Mar 2024 17:58:19 -0500
From: Michael Roth <michael.roth@....com>
To: <kvm@...r.kernel.org>
CC: <linux-coco@...ts.linux.dev>, <linux-mm@...ck.org>,
<linux-crypto@...r.kernel.org>, <x86@...nel.org>,
<linux-kernel@...r.kernel.org>, <tglx@...utronix.de>, <mingo@...hat.com>,
<jroedel@...e.de>, <thomas.lendacky@....com>, <hpa@...or.com>,
<ardb@...nel.org>, <pbonzini@...hat.com>, <seanjc@...gle.com>,
<vkuznets@...hat.com>, <jmattson@...gle.com>, <luto@...nel.org>,
<dave.hansen@...ux.intel.com>, <slp@...hat.com>, <pgonda@...gle.com>,
<peterz@...radead.org>, <srinivas.pandruvada@...ux.intel.com>,
<rientjes@...gle.com>, <dovmurik@...ux.ibm.com>, <tobin@....com>,
<bp@...en8.de>, <vbabka@...e.cz>, <kirill@...temov.name>,
<ak@...ux.intel.com>, <tony.luck@...el.com>,
<sathyanarayanan.kuppuswamy@...ux.intel.com>, <alpergun@...gle.com>,
<jarkko@...nel.org>, <ashish.kalra@....com>, <nikunj.dadhania@....com>,
<pankaj.gupta@....com>, <liam.merwick@...cle.com>, Brijesh Singh
<brijesh.singh@....com>
Subject: [PATCH v12 13/29] KVM: SEV: Add support to handle GHCB GPA register VMGEXIT
From: Brijesh Singh <brijesh.singh@....com>
SEV-SNP guests are required to perform a GHCB GPA registration. Before
using a GHCB GPA for a vCPU the first time, a guest must register the
vCPU GHCB GPA. If hypervisor can work with the guest requested GPA then
it must respond back with the same GPA otherwise return -1.
On VMEXIT, verify that the GHCB GPA matches with the registered value.
If a mismatch is detected, then abort the guest.
Signed-off-by: Brijesh Singh <brijesh.singh@....com>
Signed-off-by: Ashish Kalra <ashish.kalra@....com>
Signed-off-by: Michael Roth <michael.roth@....com>
---
arch/x86/include/asm/sev-common.h | 8 ++++++++
arch/x86/kvm/svm/sev.c | 27 +++++++++++++++++++++++++++
arch/x86/kvm/svm/svm.h | 7 +++++++
3 files changed, 42 insertions(+)
diff --git a/arch/x86/include/asm/sev-common.h b/arch/x86/include/asm/sev-common.h
index 5a8246dd532f..1006bfffe07a 100644
--- a/arch/x86/include/asm/sev-common.h
+++ b/arch/x86/include/asm/sev-common.h
@@ -59,6 +59,14 @@
#define GHCB_MSR_AP_RESET_HOLD_RESULT_POS 12
#define GHCB_MSR_AP_RESET_HOLD_RESULT_MASK GENMASK_ULL(51, 0)
+/* Preferred GHCB GPA Request */
+#define GHCB_MSR_PREF_GPA_REQ 0x010
+#define GHCB_MSR_GPA_VALUE_POS 12
+#define GHCB_MSR_GPA_VALUE_MASK GENMASK_ULL(51, 0)
+
+#define GHCB_MSR_PREF_GPA_RESP 0x011
+#define GHCB_MSR_PREF_GPA_NONE 0xfffffffffffff
+
/* GHCB GPA Register */
#define GHCB_MSR_REG_GPA_REQ 0x012
#define GHCB_MSR_REG_GPA_REQ_VAL(v) \
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 3d6c030091c2..b882f72a940a 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -3474,6 +3474,26 @@ static int sev_handle_vmgexit_msr_protocol(struct vcpu_svm *svm)
set_ghcb_msr_bits(svm, GHCB_MSR_HV_FT_RESP,
GHCB_MSR_INFO_MASK, GHCB_MSR_INFO_POS);
break;
+ case GHCB_MSR_PREF_GPA_REQ:
+ set_ghcb_msr_bits(svm, GHCB_MSR_PREF_GPA_NONE, GHCB_MSR_GPA_VALUE_MASK,
+ GHCB_MSR_GPA_VALUE_POS);
+ set_ghcb_msr_bits(svm, GHCB_MSR_PREF_GPA_RESP, GHCB_MSR_INFO_MASK,
+ GHCB_MSR_INFO_POS);
+ break;
+ case GHCB_MSR_REG_GPA_REQ: {
+ u64 gfn;
+
+ gfn = get_ghcb_msr_bits(svm, GHCB_MSR_GPA_VALUE_MASK,
+ GHCB_MSR_GPA_VALUE_POS);
+
+ svm->sev_es.ghcb_registered_gpa = gfn_to_gpa(gfn);
+
+ set_ghcb_msr_bits(svm, gfn, GHCB_MSR_GPA_VALUE_MASK,
+ GHCB_MSR_GPA_VALUE_POS);
+ set_ghcb_msr_bits(svm, GHCB_MSR_REG_GPA_RESP, GHCB_MSR_INFO_MASK,
+ GHCB_MSR_INFO_POS);
+ break;
+ }
case GHCB_MSR_TERM_REQ: {
u64 reason_set, reason_code;
@@ -3537,6 +3557,13 @@ int sev_handle_vmgexit(struct kvm_vcpu *vcpu)
trace_kvm_vmgexit_enter(vcpu->vcpu_id, svm->sev_es.ghcb);
sev_es_sync_from_ghcb(svm);
+
+ /* SEV-SNP guest requires that the GHCB GPA must be registered */
+ if (sev_snp_guest(svm->vcpu.kvm) && !ghcb_gpa_is_registered(svm, ghcb_gpa)) {
+ vcpu_unimpl(&svm->vcpu, "vmgexit: GHCB GPA [%#llx] is not registered.\n", ghcb_gpa);
+ return -EINVAL;
+ }
+
ret = sev_es_validate_vmgexit(svm);
if (ret)
return ret;
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index a3c190642c57..bb04d63012b4 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -208,6 +208,8 @@ struct vcpu_sev_es_state {
u32 ghcb_sa_len;
bool ghcb_sa_sync;
bool ghcb_sa_free;
+
+ u64 ghcb_registered_gpa;
};
struct vcpu_svm {
@@ -361,6 +363,11 @@ static __always_inline bool sev_snp_guest(struct kvm *kvm)
#endif
}
+static inline bool ghcb_gpa_is_registered(struct vcpu_svm *svm, u64 val)
+{
+ return svm->sev_es.ghcb_registered_gpa == val;
+}
+
static inline void vmcb_mark_all_dirty(struct vmcb *vmcb)
{
vmcb->control.clean = 0;
--
2.25.1
X-sender: <linux-crypto+bounces-3091-steffen.klassert=secunet.com@...r.kernel.org>
X-Receiver: <steffen.klassert@...unet.com> ORCPT=rfc822;steffen.klassert@...unet.com; X-ExtendedProps=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
X-CreatedBy: MSExchange15
X-HeloDomain: b.mx.secunet.com
X-ExtendedProps: 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
X-Source: SMTP:Default MBX-ESSEN-02
X-SourceIPAddress: 62.96.220.37
X-EndOfInjectedXHeaders: 23213
Received: from cas-essen-02.secunet.de (10.53.40.202) by
mbx-essen-02.secunet.de (10.53.40.198) with Microsoft SMTP Server
(version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id
15.1.2507.37; Sat, 30 Mar 2024 00:01:18 +0100
Received: from b.mx.secunet.com (62.96.220.37) by cas-essen-02.secunet.de
(10.53.40.202) with Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35 via Frontend
Transport; Sat, 30 Mar 2024 00:01:18 +0100
Received: from localhost (localhost [127.0.0.1])
by b.mx.secunet.com (Postfix) with ESMTP id 7B7E22032C
for <steffen.klassert@...unet.com>; Sat, 30 Mar 2024 00:01:18 +0100 (CET)
X-Virus-Scanned: by secunet
X-Spam-Flag: NO
X-Spam-Score: -2.85
X-Spam-Level:
X-Spam-Status: No, score=-2.85 tagged_above=-999 required=2.1
tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.099, DKIM_SIGNED=0.1,
DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1,
HEADER_FROM_DIFFERENT_DOMAINS=0.249, MAILING_LIST_MULTI=-1,
RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001]
autolearn=ham autolearn_force=no
Authentication-Results: a.mx.secunet.com (amavisd-new);
dkim=pass (1024-bit key) header.d=amd.com
Received: from b.mx.secunet.com ([127.0.0.1])
by localhost (a.mx.secunet.com [127.0.0.1]) (amavisd-new, port 10024)
with ESMTP id XOxpnGT-o5h4 for <steffen.klassert@...unet.com>;
Sat, 30 Mar 2024 00:01:15 +0100 (CET)
Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=147.75.48.161; helo=sy.mirrors.kernel.org; envelope-from=linux-crypto+bounces-3091-steffen.klassert=secunet.com@...r.kernel.org; receiver=steffen.klassert@...unet.com
DKIM-Filter: OpenDKIM Filter v2.11.0 b.mx.secunet.com A6462200BB
Authentication-Results: b.mx.secunet.com;
dkim=pass (1024-bit key) header.d=amd.com header.i=@....com header.b="pOjtEGW9"
Received: from sy.mirrors.kernel.org (sy.mirrors.kernel.org [147.75.48.161])
(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
(No client certificate requested)
by b.mx.secunet.com (Postfix) with ESMTPS id A6462200BB
for <steffen.klassert@...unet.com>; Sat, 30 Mar 2024 00:01:14 +0100 (CET)
Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140])
(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
(No client certificate requested)
by sy.mirrors.kernel.org (Postfix) with ESMTPS id 1BF7FB214ED
for <steffen.klassert@...unet.com>; Fri, 29 Mar 2024 23:01:11 +0000 (UTC)
Received: from localhost.localdomain (localhost.localdomain [127.0.0.1])
by smtp.subspace.kernel.org (Postfix) with ESMTP id 86D0613E410;
Fri, 29 Mar 2024 23:00:52 +0000 (UTC)
Authentication-Results: smtp.subspace.kernel.org;
dkim=pass (1024-bit key) header.d=amd.com header.i=@....com header.b="pOjtEGW9"
X-Original-To: linux-crypto@...r.kernel.org
Received: from NAM10-DM6-obe.outbound.protection.outlook.com (mail-dm6nam10on2070.outbound.protection.outlook.com [40.107.93.70])
(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
(No client certificate requested)
by smtp.subspace.kernel.org (Postfix) with ESMTPS id BBF8D13E048;
Fri, 29 Mar 2024 23:00:50 +0000 (UTC)
Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.93.70
ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;
t=1711753252; cv=fail; b=oTpN7PdEJ9jIspUxNioBOlLLcF6gzrnuC0L3riJfQ7nUsfL4QNoVwunMUVlptSptvbxOMApLqS1pt6A/PWO77bUtjZyw0SqEolJ5GWpiCdeoIjaHkOb2wgeWhODtGXom/3gq0/BFOh6FkrPXF6QE1Snmo+esqmXIauMuk9WfdOQ=
ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org;
s=arc-20240116; t=1711753252; c=relaxed/simple;
bh=fRe47pl494d1OFWUZ11O/mVIdyx956Cti3mXx9SL/40=;
h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References:
MIME-Version:Content-Type; b=dJ5MMh8ioZKt/FZdKKyadx+msJsHY1CbQZ69izVUheIZzyChYuYpN+gUfLsILTypUuw2rDOGjty1IqOOdSpAWl3H3QNK8L3iR92pe//SOCvmnep9LHTTAcHFT1GorYPXzLJ2eoA4lJ1wtgzPb3w1MVAltEhI58Upuri1QXroDdc=
ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com; spf=fail smtp.mailfrom=amd.com; dkim=pass (1024-bit key) header.d=amd.com header.i=@....com header.b=pOjtEGW9; arc=fail smtp.client-ip=40.107.93.70
Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com
Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=amd.com
ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none;
b=ltxPzb4gC8CpZoT0mToE4xswkcDhnQWLRxkZQkARKc6uO6rmCINkuYyaHObH51zPODE6Z1l0EukNTsFrrMVoW5Do+xc8i+lunElm1VdacrzICPqGYcwAgeCcxwfwFQuqYFcVUQjiAJ4qiaWX/AA5y+d9Y3SD4Tf17CejubNk0nGjeJFwonDL3lKGmCWEpUTxr8AfsNCPrSGlhmltm7BmuOR8kDAsjuKvMh/+9FMn6YxlL3m+lMEWtJL5TjVjc/Vk+ywbDcGVBql2LkoWGlrxSDK5YkoAnDWSdjJEiSjnDCIvZJCJeu2H1obfRwuzvnN/EOXb0kEOel7QCK6HB49NzQ==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com;
s=arcselector9901;
h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1;
bh=/obp0nq9HpBfpSuTPA6s+n3JuXbuVzFzKzZUYOn/UVQ=;
b=VMvhUTOQ2LFjZX5tQQ8jO627Se68WfKdj/PFQkVTb0p/JwxY6l514Q0ULuZuwZdWGfP+HP3z5VeDVFNFCqQGQeN8Aux7FdM0HQ8e1D2E9jkDB1dDs4DBcuSvHBBF90v4T/03uBrlgLy4VQZVWDWKpF1A2dcvht6vdALp9auGeGuxJ20lj/k1j3h4tbZ0lFqIkz/aWCyqVKNr+99GkZlqKvhtPSWkui8xKWwm1VJEN0zUiPKrQXOwlM0dQZvyKiahDLhWL3oZIQ7CAj9P6YScaO9+Zz0q9vaMzABl4coqFP6QXEWwwCLYUBGELAv3nSD9ExQIS08r0az/8KlgoA0DZQ==
ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is
165.204.84.17) smtp.rcpttodomain=vger.kernel.org smtp.mailfrom=amd.com;
dmarc=pass (p=quarantine sp=quarantine pct=100) action=none
header.from=amd.com; dkim=none (message not signed); arc=none (0)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1;
h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;
bh=/obp0nq9HpBfpSuTPA6s+n3JuXbuVzFzKzZUYOn/UVQ=;
b=pOjtEGW90KAdqaBSD5vBLGAQDENX/PrdSKwWhEu+ods4hZ40tPbULyRx3ml71Sy2QQdT0vKnFhxAiW9udjyUENct/EDHy9p9RYZeal7/Vc4iHnE1N2zsnhIagISLZXeUP6dj1+TxZ6YcY7zyz2/lDn7OBKmv0FVypT1UzsV57R0=
Received: from SJ0PR03CA0014.namprd03.prod.outlook.com (2603:10b6:a03:33a::19)
by PH7PR12MB9224.namprd12.prod.outlook.com (2603:10b6:510:2e7::8) with
Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7409.33; Fri, 29 Mar
2024 23:00:46 +0000
Received: from SJ1PEPF00001CDE.namprd05.prod.outlook.com
(2603:10b6:a03:33a:cafe::88) by SJ0PR03CA0014.outlook.office365.com
(2603:10b6:a03:33a::19) with Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7409.40 via Frontend
Transport; Fri, 29 Mar 2024 23:00:46 +0000
X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17)
smtp.mailfrom=amd.com; dkim=none (message not signed)
header.d=none;dmarc=pass action=none header.from=amd.com;
Received-SPF: Pass (protection.outlook.com: domain of amd.com designates
165.204.84.17 as permitted sender) receiver=protection.outlook.com;
client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C
Received: from SATLEXMB04.amd.com (165.204.84.17) by
SJ1PEPF00001CDE.mail.protection.outlook.com (10.167.242.6) with Microsoft
SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id
15.20.7409.10 via Frontend Transport; Fri, 29 Mar 2024 23:00:46 +0000
Received: from localhost (10.180.168.240) by SATLEXMB04.amd.com
(10.181.40.145) with Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Fri, 29 Mar
2024 18:00:45 -0500
From: Michael Roth <michael.roth@....com>
To: <kvm@...r.kernel.org>
CC: <linux-coco@...ts.linux.dev>, <linux-mm@...ck.org>,
<linux-crypto@...r.kernel.org>, <x86@...nel.org>,
<linux-kernel@...r.kernel.org>, <tglx@...utronix.de>, <mingo@...hat.com>,
<jroedel@...e.de>, <thomas.lendacky@....com>, <hpa@...or.com>,
<ardb@...nel.org>, <pbonzini@...hat.com>, <seanjc@...gle.com>,
<vkuznets@...hat.com>, <jmattson@...gle.com>, <luto@...nel.org>,
<dave.hansen@...ux.intel.com>, <slp@...hat.com>, <pgonda@...gle.com>,
<peterz@...radead.org>, <srinivas.pandruvada@...ux.intel.com>,
<rientjes@...gle.com>, <dovmurik@...ux.ibm.com>, <tobin@....com>,
<bp@...en8.de>, <vbabka@...e.cz>, <kirill@...temov.name>,
<ak@...ux.intel.com>, <tony.luck@...el.com>,
<sathyanarayanan.kuppuswamy@...ux.intel.com>, <alpergun@...gle.com>,
<jarkko@...nel.org>, <ashish.kalra@....com>, <nikunj.dadhania@....com>,
<pankaj.gupta@....com>, <liam.merwick@...cle.com>, Brijesh Singh
<brijesh.singh@....com>
Subject: [PATCH v12 13/29] KVM: SEV: Add support to handle GHCB GPA register VMGEXIT
Date: Fri, 29 Mar 2024 17:58:19 -0500
Message-ID: <20240329225835.400662-14-michael.roth@....com>
X-Mailer: git-send-email 2.25.1
In-Reply-To: <20240329225835.400662-1-michael.roth@....com>
References: <20240329225835.400662-1-michael.roth@....com>
Precedence: bulk
X-Mailing-List: linux-crypto@...r.kernel.org
List-Id: <linux-crypto.vger.kernel.org>
List-Subscribe: <mailto:linux-crypto+subscribe@...r.kernel.org>
List-Unsubscribe: <mailto:linux-crypto+unsubscribe@...r.kernel.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Content-Type: text/plain
X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com
(10.181.40.145)
X-EOPAttributedMessage: 0
X-MS-PublicTrafficType: Email
X-MS-TrafficTypeDiagnostic: SJ1PEPF00001CDE:EE_|PH7PR12MB9224:EE_
X-MS-Office365-Filtering-Correlation-Id: 194a5219-e203-4dc0-b9e3-08dc504411c3
X-MS-Exchange-SenderADCheck: 1
X-MS-Exchange-AntiSpam-Relay: 0
X-Microsoft-Antispam: BCL:0;
X-Microsoft-Antispam-Message-Info: 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
X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230031)(82310400014)(1800799015)(7416005)(376005)(36860700004);DIR:OUT;SFP:1101;
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Mar 2024 23:00:46.4555
(UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: 194a5219-e203-4dc0-b9e3-08dc504411c3
X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com]
X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF00001CDE.namprd05.prod.outlookcom
X-MS-Exchange-CrossTenant-AuthAs: Anonymous
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB9224
Return-Path: linux-crypto+bounces-3091-steffen.klassert=secunet.com@...r.kernel.org
X-MS-Exchange-Organization-OriginalArrivalTime: 29 Mar 2024 23:01:18.5360
(UTC)
X-MS-Exchange-Organization-Network-Message-Id: a3d8c1eb-4e9d-4367-e514-08dc504424cf
X-MS-Exchange-Organization-OriginalClientIPAddress: 62.96.220.37
X-MS-Exchange-Organization-OriginalServerIPAddress: 10.53.40.202
X-MS-Exchange-Organization-Cross-Premises-Headers-Processed: cas-essen-02.secunet.de
X-MS-Exchange-Organization-OrderedPrecisionLatencyInProgress: LSRV=mbx-essen-02.secunet.de:TOTAL-HUB=33466.838|SMR=0.128(SMRDE=0.004|SMRC=0.123(SMRCL=0.104|X-SMRCR=0.123))|CAT=0.061(CATRESL=0.024
(CATRESLP2R=0.004)|CATORES=0.034(CATRS=0.034(CATRS-Index Routing
Agent=0.033)))|QDM=11396.107
|SMSC=0.015|SMS=2.770(SMSMBXD-INC=2.764)|QDM=21134.642|SMSC=0.529(X-SMSDR=0.013)|SMS=5.654
(SMSMBXD-INC=5.162)|QDM=921.790|PSC=0.023|CAT=0.013(CATRESL=0.012(CATRESLP2R=0.008
))|QDM=5.350|CAT=0.007(CATRESL=0.006(CATRESLP2R=0.004));2024-03-30T08:19:05.386Z
X-MS-Exchange-Forest-ArrivalHubServer: mbx-essen-02.secunet.de
X-MS-Exchange-Organization-AuthSource: cas-essen-02.secunet.de
X-MS-Exchange-Organization-AuthAs: Anonymous
X-MS-Exchange-Organization-FromEntityHeader: Internet
X-MS-Exchange-Organization-OriginalSize: 15811
X-MS-Exchange-Organization-HygienePolicy: Standard
X-MS-Exchange-Organization-MessageLatency: SRV=cas-essen-02.secunet.de:TOTAL-FE=0.011|SMR=0.004(SMRPI=0.002(SMRPI-FrontendProxyAgent=0.002))|SMS=0.006
X-MS-Exchange-Organization-Recipient-Limit-Verified: True
X-MS-Exchange-Organization-TotalRecipientCount: 1
X-MS-Exchange-Organization-Rules-Execution-History: 0b0cf904-14ac-4724-8bdf-482ee6223cf2%%%fd34672d-751c-45ae-a963-ed177fcabe23%%%d8080257-b0c3-47b4-b0db-23bc0c8ddb3c%%%95e591a2-5d7d-4afa-b1d0-7573d6c0a5d9%%%f7d0f6bc-4dcc-4876-8c5d-b3d6ddbb3d55%%%16355082-c50b-4214-9c7d-d39575f9f79b
X-MS-Exchange-Forest-RulesExecuted: mbx-essen-02
X-MS-Exchange-Organization-RulesExecuted: mbx-essen-02
X-MS-Exchange-Forest-IndexAgent-0: AQ0CZW4AAawIAAAPAAADH4sIAAAAAAAEAM1XeW/bRhYf6rZi2c3ppP
tHJwk2sGxJ1uUjcRok6SoH6qt2EhTYLgiKGkpcS6SXpJQYbb/rfpR9
7w1JkRIVu7tAsYRAzfHu93vzhv9++MaxR8/4a8f8p3AH/My0+gP+vC
unNRenL7VRr6bboxelYql41vlUPTs64f2xcD2Xa47gjvjX2HREj3s2
vxCOYTsjrvG37354zd+evILtvul6juaZtlXjrwXsi1JxjKKjZLAM08
kPJx+5NxDcMB3X4545EhVYJm18NIaXFCccpCoViT6QUePvDT64BBsm
pgvidM3in23nnH82vQFJlXLQYPgHi1ExrFulohmKdy9sq8e7mh7hc7
WRIGIbZs5n00WvvbFj8WqjhmE5tvinw87P7z9U+EQ4pnEJbJpHvKGH
I83TB8KdSg1cAUMm2nAsQBI4oPGR6RItN13eE57QwdQK2cm1ru14U1
dI95nZt0SvahtGtXt57VTOcL1yByYw/agNHY0/12hWO8fZYp5DUx9o
YshPISr8+UjOag7MIjzVarVUBJzog60veztbpqUPxz2xpbmjLVdMqk
A0AlwM+G+c7/FN/4lynE+AckLUNZ1Hnt94czfkSHgShUxGoCsmhIdC
gKEFwBtCjsAVq49Rbze5abnCQfS665tlDHjPNAxerfYBM9rW1Z51r6
YB/Fk98YVva3vN9k6vt91qGrVao17f6RqGIeq7GsdJu03xvI7WUhEc
up7qly95dftpZYdvwrvR5i9fQiAe94RhWhK96uHZqfrqRD3tnHU+qO
+OD/6Gw48HH9ST4zMZxkbz2jyHr85+JJ63nSMcqx8PDta3GxVep+Bu
bm3wE0cYwsG6CIvnVNYs39gCkjlFJ6edNyqQgY6fprmtf6k36knkSP
np1cHHztQB34ev0YaGR54kHzavsPDsJGZh46vkR8dHnQi5EX1IFYd4
RaLkH44Ypvl8nHbezkeJjEhMX4QcQ7A+Kc+6j88viwoiXrjdBRsB9F
u9Hb3eqtefNvRmrdbd22sau03tabu+EPozYmbwPrOLIG+1d9sIc/pv
7gDQuetBX9KhxD0OhCpUfW8o1MmoL76YnjpyHfUCzjNbt4fr0MPGus
cn+sVYBcF8A16Q7dlwuMJT+wO9S8xd03PXga4yDeq7T+qbD4SCyjzz
/BPyvT96c0wQrMysAYTL+/Oiuo7QzmF905/rmrugYJ5Nia7rRAyelU
XFUpkX/BUHY0VZ3v8fjKLgJkXuD9kTDe4s29eDG6mbZ/zXee7xTpv3
DWtfHhUzm7DBv+f9K3z9LwJ9ZbgTIj4ZVV9gXQi3RtZMbyxq/0JDOw
1L9WycrMNwkZhkZ4Dh/wU604z92cj5fVq5cRB96JwehgiaVYUIAkGu
bangWiUY63ZP7GMTpdNuu7VLp9329m6l0cLTLvmYC042ODFVPN34Br
4jRxtc3nWh0rZ/MAoLQLCOZNUXdCCacFWaRUuZTJmmADdU99LSVQO+
OSgfmIYZ0EA7i31jBJ8XbtKNGm/s3dhFmu4HvijT4Ouo1rUuVJK1Ti
aiwTXwpsyfPOEPCRaAX9V0I/D2EervlctJZUyOjy1zdDFcfxJKrvBH
fpSeTQ39+18fD4df/oEXesv2IvbWfrEeRfQkACb4zui8PwKIx5GzOQ
0vkEE5+kGGrwmzp3mRDMswB8QYGGBI6F6+Nvjbv7Kt01U6qePiRtDW
tZbeeArtu6lv70Jb79bbvZ0W3De67SvbuhSzqK3LXQR6s76HOMe/Pd
nTI43aRx20eREtpHGrKaPuaupQWJHYdG17GG4hWhftGY4QcejSuT5/
TKKA32UtzN4hfvVLdadBlbrTqjQakWuJqmrDz9qlq5rWEG9mpH8G0W
Ht8o1zeSF5LCzIHCql+3R4xZmKWIT5hBtOhbwCQOHFNlIEPlCu7BDf
Iy+GyYdr3JqJbcK37wgPZs05B2+Has90vMvQFNiC4wje6Fgkf7hUfa
HblufYw5o+FBp2zfo+oqlUbNaa27UGel8qMpZhuTwrZFk+r7C7OMil
WSbNCmmF5XGQybE8vAtsKcXSQKmwVIZlYWWZreSIPlyBXziG9Qxt0S
AL7GmWzdAPBiCqyG4AWbCC9EusSCs52IVF0BXuyjcQ5JR8irEUg3ca
tINtUQLJAgMQnmUFoAEDpOUFVoQt6V0W5bAS+ZUirjn3c1EC0AIEsH
IHBwkEpDeXR4JCEIrl0CScKqxIchQlqzAGrGHE/Lgpq+TXw7n1b5Be
WSYuDGZeWSJKCODNDBkQxnxWF0st3kqDKMjgslLKMZZjy4sp8wu3FA
gFhDhDFqbkmGxbwrwo7CFxpUgXSEAg+cbnJMGjOYIMWwJ9NxB+JEoK
Z8UlSh/ZsCJ570bynmalbKD0XhBAzJSyHFW3FtnKsDtJimJCAmjNCg
/XV9l9OS6wVUlwJ5a+lZDxfjytlLUHM+mLbKWSFhemLEKTT1hUclnG
skpOpkmOw7DIhH5HCZX5LQQ2F6hU0+weENyceo2LsHs7yB1VaxlWbg
UEUAsZZAnp17LsmwxxxbOWLDke5Nxc4sqzWWZr15QTsbC8yMJ4Bu/T
+0EasZSgIm7Y1pxh32IAFUgWBkoGjc69nCwiWCTib+eFJ8m/ruN3Iy
5cw/G/SMcji+h1Di0EeGRzWCaAh+VFKJIQuhVAiMocwEOq2WoWvcil
/WM2J+3JYwvIxILDbqXRcjkOO8XdsA0BLyAzE8up7CNrKTKgNA1LNk
DvUhixoOOEWw8y6BecOQVqTGC5FJ6X7YmaCJRYJqBfo3bznczdGgkE
e6hkVsmXe1RNuT+tqDPQu2U3UVLTsTxFg2zS0XozTV7c8P1akelepi
kkKD69JYkDoK5MjwKlOK/RP0aU/CpLAaXfjiO5oJiAJZD6lZBgJinx
00a6ectnTKidfDou6nbkCkGLEJnb/q1GKZC18p2icz6N4/8ADIO3n9
kZAAABAtwCPD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0idXRm
LTE2Ij8+DQo8VGFza1NldD4NCiAgPFZlcnNpb24+MTUuMC4wLjA8L1
ZlcnNpb24+DQogIDxUYXNrcz4NCiAgICA8VGFzayBTdGFydEluZGV4
PSIzMjYiPg0KICAgICAgPFRhc2tTdHJpbmc+T24gVk1FWElULCB2ZX
JpZnkgdGhhdCB0aGUgR0hDQiBHUEEgbWF0Y2hlcyB3aXRoIHRoZSBy
ZWdpc3RlcmVkIHZhbHVlLjwvVGFza1N0cmluZz4NCiAgICAgIDxBc3
NpZ25lZXM+DQogICAgICAgIDxFbWFpbFVzZXIgSWQ9Imt2bUB2Z2Vy
Lmtlcm5lbC5vcmciIC8+DQogICAgICA8L0Fzc2lnbmVlcz4NCiAgIC
A8L1Rhc2s+DQogIDwvVGFza3M+DQo8L1Rhc2tTZXQ+AQrDAzw/eG1s
IHZlcnNpb249IjEuMCIgZW5jb2Rpbmc9InV0Zi0xNiI/Pg0KPEVtYW
lsU2V0Pg0KICA8VmVyc2lvbj4xNS4wLjAuMDwvVmVyc2lvbj4NCiAg
PEVtYWlscz4NCiAgICA8RW1haWwgU3RhcnRJbmRleD0iMjEiPg0KIC
AgICAgPEVtYWlsU3RyaW5nPmJyaWplc2guc2luZ2hAYW1kLmNvbTwv
RW1haWxTdHJpbmc+DQogICAgPC9FbWFpbD4NCiAgICA8RW1haWwgU3
RhcnRJbmRleD0iNTMzIiBQb3NpdGlvbj0iT3RoZXIiPg0KICAgICAg
PEVtYWlsU3RyaW5nPmFzaGlzaC5rYWxyYUBhbWQuY29tPC9FbWFpbF
N0cmluZz4NCiAgICA8L0VtYWlsPg0KICAgIDxFbWFpbCBTdGFydElu
ZGV4PSI1ODUiIFBvc2l0aW9uPSJPdGhlciI+DQogICAgICA8RW1haW
xTdHJpbmc+bWljaGFlbC5yb3RoQGFtZC5jb208L0VtYWlsU3RyaW5n
Pg0KICAgIDwvRW1haWw+DQogIDwvRW1haWxzPg0KPC9FbWFpbFNldD
4BDOIEPD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0idXRmLTE2
Ij8+DQo8Q29udGFjdFNldD4NCiAgPFZlcnNpb24+MTUuMC4wLjA8L1
ZlcnNpb24+DQogIDxDb250YWN0cz4NCiAgICA8Q29udGFjdCBTdGFy
dEluZGV4PSI2Ij4NCiAgICAgIDxQZXJzb24gU3RhcnRJbmRleD0iNi
I+DQogICAgICAgIDxQZXJzb25TdHJpbmc+QnJpamVzaCBTaW5naDwv
UGVyc29uU3RyaW5nPg0KICAgICAgPC9QZXJzb24+DQogICAgICA8Qn
VzaW5lc3MgU3RhcnRJbmRleD0iNTEiPg0KICAgICAgICA8QnVzaW5l
c3NTdHJpbmc+U05QPC9CdXNpbmVzc1N0cmluZz4NCiAgICAgIDwvQn
VzaW5lc3M+DQogICAgICA8RW1haWxzPg0KICAgICAgICA8RW1haWwg
U3RhcnRJbmRleD0iMjEiPg0KICAgICAgICAgIDxFbWFpbFN0cmluZz
5icmlqZXNoLnNpbmdoQGFtZC5jb208L0VtYWlsU3RyaW5nPg0KICAg
ICAgICA8L0VtYWlsPg0KICAgICAgPC9FbWFpbHM+DQogICAgICA8Q2
9udGFjdFN0cmluZz5CcmlqZXNoIFNpbmdoICZsdDticmlqZXNoLnNp
bmdoQGFtZC5jb20mZ3Q7DQoNClNFVi1TTlA8L0NvbnRhY3RTdHJpbm
c+DQogICAgPC9Db250YWN0Pg0KICA8L0NvbnRhY3RzPg0KPC9Db250
YWN0U2V0PgEOzwFSZXRyaWV2ZXJPcGVyYXRvciwxMCwyO1JldHJpZX
Zlck9wZXJhdG9yLDExLDE7UG9zdERvY1BhcnNlck9wZXJhdG9yLDEw
LDA7UG9zdERvY1BhcnNlck9wZXJhdG9yLDExLDA7UG9zdFdvcmRCcm
Vha2VyRGlhZ25vc3RpY09wZXJhdG9yLDEwLDI7UG9zdFdvcmRCcmVh
a2VyRGlhZ25vc3RpY09wZXJhdG9yLDExLDA7VHJhbnNwb3J0V3JpdG VyUHJvZHVjZXIsMjAsMTI=
X-MS-Exchange-Forest-IndexAgent: 1 3863
X-MS-Exchange-Forest-EmailMessageHash: 2FF00194
X-MS-Exchange-Forest-Language: en
X-MS-Exchange-Organization-Processed-By-Journaling: Journal Agent
X-MS-Exchange-Organization-Transport-Properties: DeliveryPriority=Low
X-MS-Exchange-Organization-Prioritization: 2:RC:REDACTED-af51df60fd698f80b064826f9ee192ca@...unet.com:93/10|SR
X-MS-Exchange-Organization-IncludeInSla: False:RecipientCountThresholdExceeded
From: Brijesh Singh <brijesh.singh@....com>
SEV-SNP guests are required to perform a GHCB GPA registration. Before
using a GHCB GPA for a vCPU the first time, a guest must register the
vCPU GHCB GPA. If hypervisor can work with the guest requested GPA then
it must respond back with the same GPA otherwise return -1.
On VMEXIT, verify that the GHCB GPA matches with the registered value.
If a mismatch is detected, then abort the guest.
Signed-off-by: Brijesh Singh <brijesh.singh@....com>
Signed-off-by: Ashish Kalra <ashish.kalra@....com>
Signed-off-by: Michael Roth <michael.roth@....com>
---
arch/x86/include/asm/sev-common.h | 8 ++++++++
arch/x86/kvm/svm/sev.c | 27 +++++++++++++++++++++++++++
arch/x86/kvm/svm/svm.h | 7 +++++++
3 files changed, 42 insertions(+)
diff --git a/arch/x86/include/asm/sev-common.h b/arch/x86/include/asm/sev-common.h
index 5a8246dd532f..1006bfffe07a 100644
--- a/arch/x86/include/asm/sev-common.h
+++ b/arch/x86/include/asm/sev-common.h
@@ -59,6 +59,14 @@
#define GHCB_MSR_AP_RESET_HOLD_RESULT_POS 12
#define GHCB_MSR_AP_RESET_HOLD_RESULT_MASK GENMASK_ULL(51, 0)
+/* Preferred GHCB GPA Request */
+#define GHCB_MSR_PREF_GPA_REQ 0x010
+#define GHCB_MSR_GPA_VALUE_POS 12
+#define GHCB_MSR_GPA_VALUE_MASK GENMASK_ULL(51, 0)
+
+#define GHCB_MSR_PREF_GPA_RESP 0x011
+#define GHCB_MSR_PREF_GPA_NONE 0xfffffffffffff
+
/* GHCB GPA Register */
#define GHCB_MSR_REG_GPA_REQ 0x012
#define GHCB_MSR_REG_GPA_REQ_VAL(v) \
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 3d6c030091c2..b882f72a940a 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -3474,6 +3474,26 @@ static int sev_handle_vmgexit_msr_protocol(struct vcpu_svm *svm)
set_ghcb_msr_bits(svm, GHCB_MSR_HV_FT_RESP,
GHCB_MSR_INFO_MASK, GHCB_MSR_INFO_POS);
break;
+ case GHCB_MSR_PREF_GPA_REQ:
+ set_ghcb_msr_bits(svm, GHCB_MSR_PREF_GPA_NONE, GHCB_MSR_GPA_VALUE_MASK,
+ GHCB_MSR_GPA_VALUE_POS);
+ set_ghcb_msr_bits(svm, GHCB_MSR_PREF_GPA_RESP, GHCB_MSR_INFO_MASK,
+ GHCB_MSR_INFO_POS);
+ break;
+ case GHCB_MSR_REG_GPA_REQ: {
+ u64 gfn;
+
+ gfn = get_ghcb_msr_bits(svm, GHCB_MSR_GPA_VALUE_MASK,
+ GHCB_MSR_GPA_VALUE_POS);
+
+ svm->sev_es.ghcb_registered_gpa = gfn_to_gpa(gfn);
+
+ set_ghcb_msr_bits(svm, gfn, GHCB_MSR_GPA_VALUE_MASK,
+ GHCB_MSR_GPA_VALUE_POS);
+ set_ghcb_msr_bits(svm, GHCB_MSR_REG_GPA_RESP, GHCB_MSR_INFO_MASK,
+ GHCB_MSR_INFO_POS);
+ break;
+ }
case GHCB_MSR_TERM_REQ: {
u64 reason_set, reason_code;
@@ -3537,6 +3557,13 @@ int sev_handle_vmgexit(struct kvm_vcpu *vcpu)
trace_kvm_vmgexit_enter(vcpu->vcpu_id, svm->sev_es.ghcb);
sev_es_sync_from_ghcb(svm);
+
+ /* SEV-SNP guest requires that the GHCB GPA must be registered */
+ if (sev_snp_guest(svm->vcpu.kvm) && !ghcb_gpa_is_registered(svm, ghcb_gpa)) {
+ vcpu_unimpl(&svm->vcpu, "vmgexit: GHCB GPA [%#llx] is not registered.\n", ghcb_gpa);
+ return -EINVAL;
+ }
+
ret = sev_es_validate_vmgexit(svm);
if (ret)
return ret;
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index a3c190642c57..bb04d63012b4 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -208,6 +208,8 @@ struct vcpu_sev_es_state {
u32 ghcb_sa_len;
bool ghcb_sa_sync;
bool ghcb_sa_free;
+
+ u64 ghcb_registered_gpa;
};
struct vcpu_svm {
@@ -361,6 +363,11 @@ static __always_inline bool sev_snp_guest(struct kvm *kvm)
#endif
}
+static inline bool ghcb_gpa_is_registered(struct vcpu_svm *svm, u64 val)
+{
+ return svm->sev_es.ghcb_registered_gpa == val;
+}
+
static inline void vmcb_mark_all_dirty(struct vmcb *vmcb)
{
vmcb->control.clean = 0;
--
2.25.1
Powered by blists - more mailing lists