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Re: [PATCH 1/4] x86/cpufeature: Add User-Mode Instruction Prevention definitions

From Borislav Petkov <bp@suse.de>
Newsgroups linux.kernel
Subject Re: [PATCH 1/4] x86/cpufeature: Add User-Mode Instruction Prevention definitions
Date 2016-11-11 11:30 +0100
Message-ID <sChfQ-35W-23@gated-at.bofh.it> (permalink)
References (3 earlier) <sBsGl-2qR-13@gated-at.bofh.it> <sBzya-6Ka-47@gated-at.bofh.it> <sBOdQ-8mp-17@gated-at.bofh.it> <sBTnb-3hK-3@gated-at.bofh.it> <sCbk5-7IZ-7@gated-at.bofh.it>
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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)
-- 

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Thread

[PATCH 1/4] x86/cpufeature: Add User-Mode Instruction Prevention definitions Ricardo Neri <ricardo.neri-calderon@linux.intel.com> - 2016-11-08 07:20 +0100
  Re: [PATCH 1/4] x86/cpufeature: Add User-Mode Instruction Prevention definitions Andy Lutomirski <luto@amacapital.net> - 2016-11-08 16:40 +0100
    Re: [PATCH 1/4] x86/cpufeature: Add User-Mode Instruction  Prevention definitions Ricardo Neri <ricardo.neri-calderon@linux.intel.com> - 2016-11-09 05:30 +0100
      Re: [PATCH 1/4] x86/cpufeature: Add User-Mode Instruction Prevention definitions Andy Lutomirski <luto@amacapital.net> - 2016-11-09 12:50 +0100
        Re: [PATCH 1/4] x86/cpufeature: Add User-Mode Instruction  Prevention definitions Ricardo Neri <ricardo.neri-calderon@linux.intel.com> - 2016-11-10 04:30 +0100
          Re: [PATCH 1/4] x86/cpufeature: Add User-Mode Instruction Prevention  definitions Borislav Petkov <bp@suse.de> - 2016-11-10 10:00 +0100
            Re: [PATCH 1/4] x86/cpufeature: Add User-Mode Instruction  Prevention definitions Ricardo Neri <ricardo.neri-calderon@linux.intel.com> - 2016-11-11 05:10 +0100
              Re: [PATCH 1/4] x86/cpufeature: Add User-Mode Instruction Prevention  definitions Borislav Petkov <bp@suse.de> - 2016-11-11 11:30 +0100
                Re: [PATCH 1/4] x86/cpufeature: Add User-Mode Instruction  Prevention definitions Ricardo Neri <ricardo.neri-calderon@linux.intel.com> - 2016-11-12 02:30 +0100
              Re: [PATCH 1/4] x86/cpufeature: Add User-Mode Instruction Prevention  definitions Dave Hansen <dave.hansen@linux.intel.com> - 2016-11-11 19:10 +0100
          Re: [PATCH 1/4] x86/cpufeature: Add User-Mode Instruction Prevention  definitions Dave Hansen <dave.hansen@linux.intel.com> - 2016-11-10 18:10 +0100

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