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    SubjectRe: [tip:x86/urgent] x86, cpu, amd: Add workaround for family 16h, erratum 793
    On 01/15/2014 05:36 AM, Borislav Petkov wrote:
    >>
    >> msr_read() would essentially map to rdmsr_safe(). Each method has a
    >> return value that can be checked for failure.
    >
    > I'm not sure we want to use the _safe() variants by default as it would
    > generate the exception tables even in cases where they're clearly not
    > needed.
    >

    It would be particularly silly if what you end up with is in effect to
    wrap msr_read/write() in a BUG_ON(), which is the effect of the current
    (trapping) form. There is something to be said for hard errors.

    -hpa




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