Date: Mon, 8 May 2017 15:43:28 +0200 From: Daniel Gruss <daniel.gruss@...k.tugraz.at> To: Mark Rutland <mark.rutland@....com> CC: David Gens <david.gens@...tu-darmstadt.de>, Thomas Garnier <thgarnie@...gle.com>, kernel list <linux-kernel@...r.kernel.org>, "Kernel Hardening" <kernel-hardening@...ts.openwall.com>, <clementine.maurice@...k.tugraz.at>, <moritz.lipp@...k.tugraz.at>, "Michael Schwarz" <michael.schwarz@...k.tugraz.at>, Richard Fellner <richard.fellner@...dent.tugraz.at>, "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>, Ingo Molnar <mingo@...nel.org>, <anders.fogh@...ta-adan.de> Subject: Re: [RFC, PATCH] x86_64: KAISER - do not map kernel in user mode On 08.05.2017 15:22, Mark Rutland wrote: > Specifically, I think this does not align with the statement in 2.1 > regarding the two TTBRs: > > This simplifies privilege checks and does not require any address > translation for invalid memory accesses and thus no cache lookups. > > ... since the use of the TTBRs is orthogonal to privilege checks and/or > the design of the TLBs. Ok, this is a good point, we will try to clarify this in the paper.
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