lkml.org 
[lkml]   [2011]   [Aug]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRE: [PATCH v4 1/2] x86: Enable fast strings on Intel if BIOS hasn't already
> -----Original Message-----
> From: Andy Lutomirski [mailto:luto@MIT.EDU]
> Sent: Wednesday, August 17, 2011 7:03 AM
> To: x86@kernel.org; linux-kernel@vger.kernel.org
> Cc: Yu, Fenghua; Matthew Garrett; Len Brown; linux-
> acpi@vger.kernel.org; Ingo Molnar; Andy Lutomirski
> Subject: [PATCH v4 1/2] x86: Enable fast strings on Intel if BIOS
> hasn't already
>
> Intel SDM volume 3A, 8.4.2 says:
>
> Software can disable fast-string operation by clearing the
> fast-string-enable bit (bit 0) of IA32_MISC_ENABLE MSR.
> However, Intel recomments that system software always enable
> fast-string operation.
>
> The Intel DQ67SW board (with latest BIOS) disables fast string
> operations if TXT is enabled. A Lenovo X220 disables it regardless
> of TXT setting. I doubt I'm the only person with a dumb BIOS like
> this.
>
> Signed-off-by: Andy Lutomirski <luto@mit.edu>

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>



\
 
 \ /
  Last update: 2011-08-17 23:41    [W:0.504 / U:0.124 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site