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    SubjectRe: [PATCH -tip] x86: cpu/proc.c adding extended_cpuid_level for /proc/cpuinfo

    On Tue, May 12, 2009 at 09:40:40AM -0700, H. Peter Anvin wrote:
    > Borislav Petkov wrote:
    > >>>
    > >> why we need cpuid_level ?
    > >
    > > It is already visible in userspace. I think you've got an answer to a
    > > very similar question already:
    > >
    > >
    > >
    > extended_cpuid_level should be motivated, but probably does make sense.

    I still fail to see the need for adding that to /proc/cpuinfo,
    especially if you can do the whole exercise from userspace. But I'm sure
    you have a good example.

    > It hardly "completes" /proc/cpuinfo; especially if you consider that
    > there are at least three additional ranges in wide use (two used by a
    > single vendor only, and the third by virtualization software.)

    I think both vendors use the two ranges :-o).


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