[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Fri, 11 Nov 2016 11:22:55 +0100
From: Borislav Petkov <bp@...e.de>
To: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
Cc: Andy Lutomirski <luto@...capital.net>,
Ingo Molnar <mingo@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
X86 ML <x86@...nel.org>,
"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
Andy Lutomirski <luto@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Brian Gerst <brgerst@...il.com>,
Chen Yucong <slaoub@...il.com>,
Chris Metcalf <cmetcalf@...lanox.com>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Fenghua Yu <fenghua.yu@...el.com>,
Huang Rui <ray.huang@....com>, Jiri Slaby <jslaby@...e.cz>,
Jonathan Corbet <corbet@....net>,
"Michael S . Tsirkin" <mst@...hat.com>,
Paul Gortmaker <paul.gortmaker@...driver.com>,
Peter Zijlstra <peterz@...radead.org>,
"Ravi V . Shankar" <ravi.v.shankar@...el.com>,
Shuah Khan <shuah@...nel.org>, Vlastimil Babka <vbabka@...e.cz>
Subject: Re: [PATCH 1/4] x86/cpufeature: Add User-Mode Instruction Prevention
definitions
On Thu, Nov 10, 2016 at 08:08:07PM -0800, Ricardo Neri wrote:
> UMIP is enabled by setting a bit in CR4. If that bit is not supposed
> to be set, that could cause a #GP fault.
Yeah, you do check CPUID first, AFAICT, so you should be ok...
--
Regards/Gruss,
Boris.
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--
Powered by blists - more mailing lists