lkml.org 
[lkml]   [2009]   [Aug]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH 3/3] x86, AMD: Disable wrongly set X86_FEATURE_LAHF_LM CPUID bit
    On 08/30/2009 01:29 PM, Borislav Petkov wrote:
    >
    > Ok, what do we want actually? We have rdmsr_safe and rdmsrl_safe where
    > the last one engineers the 2 u32s into a u64. My gut feeling would opt
    > for the 2 32bit values instead of one 64bit since they're naturally
    > returned into %eax:%edx. And in the most cases we need only one of the
    > values. However, the MSRs themselves are 64bit... Hmmm...
    >

    The 2x32 bit interface is the legacy interface. It turned out to be a
    bad idea, but it's hard to clean up all the users.

    -hpa

    --
    H. Peter Anvin, Intel Open Source Technology Center
    I work for Intel. I don't speak on their behalf.



    \
     
     \ /
      Last update: 2009-08-30 22:51    [W:0.047 / U:30.180 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site