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Date: Fri, 6 Nov 2020 09:54:19 -0800 From: Dave Hansen <dave.hansen@...el.com> To: "Dr. Greg" <greg@...ellic.com>, Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com> Cc: x86@...nel.org, linux-sgx@...r.kernel.org, linux-kernel@...r.kernel.org, Sean Christopherson <sean.j.christopherson@...el.com>, linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>, Matthew Wilcox <willy@...radead.org>, Jethro Beekman <jethro@...tanix.com>, Darren Kenny <darren.kenny@...cle.com>, andriy.shevchenko@...ux.intel.com, asapek@...gle.com, bp@...en8.de, cedric.xing@...el.com, chenalexchen@...gle.com, conradparker@...gle.com, cyhanish@...gle.com, haitao.huang@...el.com, kai.huang@...el.com, kai.svahn@...el.com, kmoy@...gle.com, ludloff@...gle.com, luto@...nel.org, nhorman@...hat.com, npmccallum@...hat.com, puiterwijk@...hat.com, rientjes@...gle.com, tglx@...utronix.de, yaozhangx@...gle.com, mikko.ylinen@...el.com Subject: Re: [PATCH v40 10/24] mm: Add 'mprotect' hook to struct vm_operations_struct On 11/6/20 9:43 AM, Dr. Greg wrote: > In light of this, given the decision by the driver authors to not > fully equip the driver with EDMM support, the mprotect protection > requirements are straight forward and minimalistic. All that is > needed is a binary valued variable, set on the command-line, that > either allows or denies anonymous code execution by an enclave, > ie. access to page protection changes after initialization. To that, I say NAK. We need more flexibility than a boot-time-fixed, system-wide switch.
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