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Peter Anvin" , Tony Luck , Dave Hansen , "Peter Zijlstra (Intel)" , Paolo Bonzini , Tom Lendacky , David Rientjes , Sean Christopherson Subject: [RFC Part2 PATCH 05/30] x86: define RMP violation #PF error code Date: Wed, 24 Mar 2021 12:04:11 -0500 Message-Id: <20210324170436.31843-6-brijesh.singh@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210324170436.31843-1-brijesh.singh@amd.com> References: <20210324170436.31843-1-brijesh.singh@amd.com> Content-Type: text/plain X-Originating-IP: [165.204.77.1] X-ClientProxiedBy: SA0PR11CA0210.namprd11.prod.outlook.com (2603:10b6:806:1bc::35) To SN6PR12MB2718.namprd12.prod.outlook.com (2603:10b6:805:6f::22) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from sbrijesh-desktop.amd.com (165.204.77.1) by SA0PR11CA0210.namprd11.prod.outlook.com (2603:10b6:806:1bc::35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3977.25 via Frontend Transport; Wed, 24 Mar 2021 17:04:54 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: ba61c764-818f-484f-e00f-08d8eee6f233 X-MS-TrafficTypeDiagnostic: SA0PR12MB4557: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:4502; 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Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Joerg Roedel Cc: "H. Peter Anvin" Cc: Tony Luck Cc: Dave Hansen Cc: "Peter Zijlstra (Intel)" Cc: Paolo Bonzini Cc: Tom Lendacky Cc: David Rientjes Cc: Sean Christopherson Cc: x86@kernel.org Cc: kvm@vger.kernel.org Signed-off-by: Brijesh Singh --- arch/x86/include/asm/trap_pf.h | 2 ++ arch/x86/mm/fault.c | 1 + 2 files changed, 3 insertions(+) diff --git a/arch/x86/include/asm/trap_pf.h b/arch/x86/include/asm/trap_pf.h index 10b1de500ab1..107f9d947e8d 100644 --- a/arch/x86/include/asm/trap_pf.h +++ b/arch/x86/include/asm/trap_pf.h @@ -12,6 +12,7 @@ * bit 4 == 1: fault was an instruction fetch * bit 5 == 1: protection keys block access * bit 15 == 1: SGX MMU page-fault + * bit 31 == 1: fault was an RMP violation */ enum x86_pf_error_code { X86_PF_PROT = 1 << 0, @@ -21,6 +22,7 @@ enum x86_pf_error_code { X86_PF_INSTR = 1 << 4, X86_PF_PK = 1 << 5, X86_PF_SGX = 1 << 15, + X86_PF_RMP = 1ull << 31, }; #endif /* _ASM_X86_TRAP_PF_H */ diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index f1f1b5a0956a..f39b551f89a6 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -547,6 +547,7 @@ show_fault_oops(struct pt_regs *regs, unsigned long error_code, unsigned long ad !(error_code & X86_PF_PROT) ? "not-present page" : (error_code & X86_PF_RSVD) ? "reserved bit violation" : (error_code & X86_PF_PK) ? "protection keys violation" : + (error_code & X86_PF_RMP) ? "rmp violation" : "permissions violation"); if (!(error_code & X86_PF_USER) && user_mode(regs)) { -- 2.17.1