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Mon, 24 Feb 2025 20:13:52 +0000 Received: from PH0PR10MB5777.namprd10.prod.outlook.com ([fe80::75a8:21cc:f343:f68c]) by PH0PR10MB5777.namprd10.prod.outlook.com ([fe80::75a8:21cc:f343:f68c%4]) with mapi id 15.20.8466.016; Mon, 24 Feb 2025 20:13:52 +0000 Date: Mon, 24 Feb 2025 15:13:45 -0500 From: "Liam R. Howlett" To: Jeff Xu Cc: Dave Hansen , akpm@linux-foundation.org, keescook@chromium.org, jannh@google.com, torvalds@linux-foundation.org, vbabka@suse.cz, lorenzo.stoakes@oracle.com, adhemerval.zanella@linaro.org, oleg@redhat.com, avagin@gmail.com, benjamin@sipsolutions.net, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, linux-mm@kvack.org, jorgelo@chromium.org, sroettger@google.com, hch@lst.de, ojeda@kernel.org, thomas.weissschuh@linutronix.de, adobriyan@gmail.com, johannes@sipsolutions.net, pedro.falcato@gmail.com, hca@linux.ibm.com, willy@infradead.org, anna-maria@linutronix.de, mark.rutland@arm.com, linus.walleij@linaro.org, Jason@zx2c4.com, deller@gmx.de, rdunlap@infradead.org, davem@davemloft.net, peterx@redhat.com, f.fainelli@gmail.com, gerg@kernel.org, dave.hansen@linux.intel.com, mingo@kernel.org, ardb@kernel.org, mhocko@suse.com, 42.hyeyoo@gmail.com, peterz@infradead.org, ardb@google.com, enh@google.com, rientjes@google.com, groeck@chromium.org, mpe@ellerman.id.au, aleksandr.mikhalitsyn@canonical.com, mike.rapoport@gmail.com Subject: Re: [PATCH v6 1/7] mseal, system mappings: kernel config and header change Message-ID: Mail-Followup-To: "Liam R. Howlett" , Jeff Xu , Dave Hansen , akpm@linux-foundation.org, keescook@chromium.org, jannh@google.com, torvalds@linux-foundation.org, vbabka@suse.cz, lorenzo.stoakes@oracle.com, adhemerval.zanella@linaro.org, oleg@redhat.com, avagin@gmail.com, benjamin@sipsolutions.net, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, linux-mm@kvack.org, jorgelo@chromium.org, sroettger@google.com, hch@lst.de, ojeda@kernel.org, thomas.weissschuh@linutronix.de, adobriyan@gmail.com, johannes@sipsolutions.net, pedro.falcato@gmail.com, hca@linux.ibm.com, willy@infradead.org, anna-maria@linutronix.de, mark.rutland@arm.com, linus.walleij@linaro.org, Jason@zx2c4.com, deller@gmx.de, rdunlap@infradead.org, davem@davemloft.net, peterx@redhat.com, f.fainelli@gmail.com, gerg@kernel.org, dave.hansen@linux.intel.com, mingo@kernel.org, ardb@kernel.org, mhocko@suse.com, 42.hyeyoo@gmail.com, peterz@infradead.org, ardb@google.com, enh@google.com, rientjes@google.com, groeck@chromium.org, mpe@ellerman.id.au, aleksandr.mikhalitsyn@canonical.com, mike.rapoport@gmail.com References: <20250224174513.3600914-1-jeffxu@google.com> <20250224174513.3600914-2-jeffxu@google.com> <443992d7-f694-4e46-b120-545350a5d598@intel.com> <3nxcy7zshqxmjia7y6cyajeoclcxizkrhhsitji5ujbafbvhlu@7hqs6uodor56> Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable In-Reply-To: User-Agent: NeoMutt/20240425 X-ClientProxiedBy: YT1PR01CA0156.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:2f::35) To PH0PR10MB5777.namprd10.prod.outlook.com (2603:10b6:510:128::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH0PR10MB5777:EE_|CH3PR10MB7504:EE_ X-MS-Office365-Filtering-Correlation-Id: d04282ff-fd28-4b30-47d5-08dd550fc1b5 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|376014|7416014|1800799024|7053199007; X-Microsoft-Antispam-Message-Info: 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 brSM1Ohs 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Howlett > wrote: > > > > Also, do we need something like the above test for VM_SEALED_SYS? > > > Do you mean adding selftest for sealing vdso ? or test the > VM_SEALED_SYS macro in 32 bit vs 64 bits ? >=20 > CONFIG_MSEAL_SYSTEM_MAPPINGS is by default disabled. I'm not sure > about the common practice here. >=20 > I also don't know how to detect CONFIG_MSEAL_SYSTEM_MAPPINGS from > selftest, that is needed for the selftest. Looking more into this, I think it's fine without anything in there changing. Thanks, Liam