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Message-ID: <20240329225835.400662-6-michael.roth@amd.com> Date: Fri, 29 Mar 2024 17:58:11 -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 05/29] KVM: x86: Define RMP page fault error bits for #NPF From: Brijesh Singh <brijesh.singh@....com> When SEV-SNP is enabled globally, the hardware places restrictions on all memory accesses based on the RMP entry, whether the hypervisor or a VM, performs the accesses. When hardware encounters an RMP access violation during a guest access, it will cause a #VMEXIT(NPF) with a number of additional bits set to indicate the reasons for the #NPF. Define those here. See APM2 section 16.36.10 for more details. Signed-off-by: Brijesh Singh <brijesh.singh@....com> Signed-off-by: Ashish Kalra <ashish.kalra@....com> [mdr: add some additional details to commit message] Signed-off-by: Michael Roth <michael.roth@....com> --- arch/x86/include/asm/kvm_host.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 90dc0ae9311a..a3f8eba8d8b6 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -262,9 +262,12 @@ enum x86_intercept_stage; #define PFERR_FETCH_BIT 4 #define PFERR_PK_BIT 5 #define PFERR_SGX_BIT 15 +#define PFERR_GUEST_RMP_BIT 31 #define PFERR_GUEST_FINAL_BIT 32 #define PFERR_GUEST_PAGE_BIT 33 #define PFERR_GUEST_ENC_BIT 34 +#define PFERR_GUEST_SIZEM_BIT 35 +#define PFERR_GUEST_VMPL_BIT 36 #define PFERR_IMPLICIT_ACCESS_BIT 48 #define PFERR_PRESENT_MASK BIT(PFERR_PRESENT_BIT) @@ -277,7 +280,10 @@ enum x86_intercept_stage; #define PFERR_GUEST_FINAL_MASK BIT_ULL(PFERR_GUEST_FINAL_BIT) #define PFERR_GUEST_PAGE_MASK BIT_ULL(PFERR_GUEST_PAGE_BIT) #define PFERR_GUEST_ENC_MASK BIT_ULL(PFERR_GUEST_ENC_BIT) +#define PFERR_GUEST_RMP_MASK BIT_ULL(PFERR_GUEST_RMP_BIT) +#define PFERR_GUEST_SIZEM_MASK BIT_ULL(PFERR_GUEST_SIZEM_BIT) #define PFERR_IMPLICIT_ACCESS BIT_ULL(PFERR_IMPLICIT_ACCESS_BIT) +#define PFERR_GUEST_VMPL_MASK BIT_ULL(PFERR_GUEST_VMPL_BIT) #define PFERR_NESTED_GUEST_PAGE (PFERR_GUEST_PAGE_MASK | \ PFERR_WRITE_MASK | \ -- 2.25.1 X-sender: <linux-kernel+bounces-125517-steffen.klassert=secunet.com@...r.kernel.org> X-Receiver: <steffen.klassert@...unet.com> ORCPT=rfc822;steffen.klassert@...unet.com X-CreatedBy: MSExchange15 X-HeloDomain: mbx-dresden-01.secunet.de X-ExtendedProps: BQBjAAoAK0qmlidQ3AgFADcAAgAADwA8AAAATWljcm9zb2Z0LkV4Y2hhbmdlLlRyYW5zcG9ydC5NYWlsUmVjaXBpZW50Lk9yZ2FuaXphdGlvblNjb3BlEQAAAAAAAAAAAAAAAAAAAAAADwA/AAAATWljcm9zb2Z0LkV4Y2hhbmdlLlRyYW5zcG9ydC5EaXJlY3RvcnlEYXRhLk1haWxEZWxpdmVyeVByaW9yaXR5DwADAAAATG93 X-Source: SMTP:Default MBX-ESSEN-02 X-SourceIPAddress: 10.53.40.199 X-EndOfInjectedXHeaders: 14389 Received: from mbx-dresden-01.secunet.de (10.53.40.199) 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; 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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 DS1PEPF00017090.mail.protection.outlook.com (10.167.17.132) 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 23:08:06 +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 18:08:05 -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 05/29] KVM: x86: Define RMP page fault error bits for #NPF Date: Fri, 29 Mar 2024 17:58:11 -0500 Message-ID: <20240329225835.400662-6-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-kernel@...r.kernel.org List-Id: <linux-kernel.vger.kernel.org> List-Subscribe: <mailto:linux-kernel+subscribe@...r.kernel.org> List-Unsubscribe: <mailto:linux-kernel+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: DS1PEPF00017090:EE_|IA1PR12MB7496:EE_ X-MS-Office365-Filtering-Correlation-Id: 61266219-2315-4a78-b671-08dc50451801 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Mar 2024 23:08:06.4561 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 61266219-2315-4a78-b671-08dc50451801 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: DS1PEPF00017090.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB7496 Return-Path: linux-kernel+bounces-125517-steffen.klassert=secunet.com@...r.kernel.org X-MS-Exchange-Organization-OriginalArrivalTime: 29 Mar 2024 23:08:50.7140 (UTC) X-MS-Exchange-Organization-Network-Message-Id: 1aadb3f2-87bd-4728-eedc-08dc50453254 X-MS-Exchange-Organization-OriginalClientIPAddress: 62.96.220.36 X-MS-Exchange-Organization-OriginalServerIPAddress: 10.53.40.201 X-MS-Exchange-Organization-Cross-Premises-Headers-Processed: cas-essen-01.secunet.de X-MS-Exchange-Organization-OrderedPrecisionLatencyInProgress: LSRV=cas-essen-01.secunet.de:TOTAL-FE=0.008|SMR=0.008(SMRPI=0.006(SMRPI-FrontendProxyAgent=0.005));2024-03-29T23:08:50.723Z X-MS-Exchange-Forest-ArrivalHubServer: mbx-essen-02.secunet.de X-MS-Exchange-Organization-AuthSource: cas-essen-01.secunet.de X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-OriginalSize: 13842 X-MS-Exchange-Organization-Transport-Properties: DeliveryPriority=Low X-MS-Exchange-Organization-Prioritization: 2:ShadowRedundancy X-MS-Exchange-Organization-IncludeInSla: False:ShadowRedundancy From: Brijesh Singh <brijesh.singh@....com> When SEV-SNP is enabled globally, the hardware places restrictions on all memory accesses based on the RMP entry, whether the hypervisor or a VM, performs the accesses. When hardware encounters an RMP access violation during a guest access, it will cause a #VMEXIT(NPF) with a number of additional bits set to indicate the reasons for the #NPF. Define those here. See APM2 section 16.36.10 for more details. Signed-off-by: Brijesh Singh <brijesh.singh@....com> Signed-off-by: Ashish Kalra <ashish.kalra@....com> [mdr: add some additional details to commit message] Signed-off-by: Michael Roth <michael.roth@....com> --- arch/x86/include/asm/kvm_host.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 90dc0ae9311a..a3f8eba8d8b6 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -262,9 +262,12 @@ enum x86_intercept_stage; #define PFERR_FETCH_BIT 4 #define PFERR_PK_BIT 5 #define PFERR_SGX_BIT 15 +#define PFERR_GUEST_RMP_BIT 31 #define PFERR_GUEST_FINAL_BIT 32 #define PFERR_GUEST_PAGE_BIT 33 #define PFERR_GUEST_ENC_BIT 34 +#define PFERR_GUEST_SIZEM_BIT 35 +#define PFERR_GUEST_VMPL_BIT 36 #define PFERR_IMPLICIT_ACCESS_BIT 48 #define PFERR_PRESENT_MASK BIT(PFERR_PRESENT_BIT) @@ -277,7 +280,10 @@ enum x86_intercept_stage; #define PFERR_GUEST_FINAL_MASK BIT_ULL(PFERR_GUEST_FINAL_BIT) #define PFERR_GUEST_PAGE_MASK BIT_ULL(PFERR_GUEST_PAGE_BIT) #define PFERR_GUEST_ENC_MASK BIT_ULL(PFERR_GUEST_ENC_BIT) +#define PFERR_GUEST_RMP_MASK BIT_ULL(PFERR_GUEST_RMP_BIT) +#define PFERR_GUEST_SIZEM_MASK BIT_ULL(PFERR_GUEST_SIZEM_BIT) #define PFERR_IMPLICIT_ACCESS BIT_ULL(PFERR_IMPLICIT_ACCESS_BIT) +#define PFERR_GUEST_VMPL_MASK BIT_ULL(PFERR_GUEST_VMPL_BIT) #define PFERR_NESTED_GUEST_PAGE (PFERR_GUEST_PAGE_MASK | \ PFERR_WRITE_MASK | \ -- 2.25.1
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