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    SubjectRe: Fail to early boot with v2.6.27-rc2 to at least v2.6.29-rc2 due to dc1e35c
    On Mon, Jan 19, 2009 at 02:07:36PM -0800, H. Peter Anvin wrote:
    > Suresh Siddha wrote:
    > >
    > > Also, I wonder, if we should complain/scream during boot if we find only
    > > fewer cpuid levels on modern generation cpu's.
    > >
    > We should, or if this block is reversible, we should probably just undo
    > it (the reason people put this block in places is because of, ahem,
    > inferior operating systems having bugs.)
    > Do you know how this is managed? Via an MSR?

    IA32_MISC_ENABLE MSR bit 22

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