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Message-ID: <1478913845.2541.0.camel@ranerica-desktop>
Subject: Re: [PATCH 1/4] x86/cpufeature: Add User-Mode Instruction
 Prevention definitions
From: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
To: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>, Ingo Molnar <mingo@kernel.org>,
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        "Ravi V . Shankar" <ravi.v.shankar@intel.com>,
        Shuah Khan <shuah@kernel.org>, Vlastimil Babka <vbabka@suse.cz>
Date: Fri, 11 Nov 2016 17:24:05 -0800
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On Fri, 2016-11-11 at 11:22 +0100, Borislav Petkov wrote:
> 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...

Right. I missed this detail. Yes, there should not be a problem.
> 
> -- 
> Regards/Gruss,
>     Boris.
> 
> SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)