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    SubjectRe: [PATCH] PPC/PPC64: Introduce CPU_HAS_FEATURE() macro
    On Freedag 04 Februar 2005 19:35, Olof Johansson wrote:
    > pSeries will need all cpus enabled since we have them all on various
    > machines, etc. I guess Powermac/Maple could benefit from it.

    Even on pSeries, we already have CONFIG_POWER4_ONLY, which could be
    used to optimize away some of the checks at compile time.

    I think it makes sense to extend this a bit to look more like the CPU
    selection on i386 or s390 where can set the oldest CPU you want to
    support. This also fits nicely with the gcc -mcpu= options.

    > In the end it depends on how hairy the implementation would get vs
    > performance improvement.

    Fortunately, that optimization should be easy to do on top of your
    patch, so we don't have to decide now.

    Arnd <><
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