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    SubjectRe: [BUG] x86 kenel won't boot under Virtual PC
    H. Peter Anvin wrote:
    >
    > The help text is indeed out of date. I did a patch yesterday to, among
    > other things, update it; I also want to verify that we are disabling all
    > options that can cause gcc or binutils to generate nopl's; I plan to
    > push it today.
    >

    OK, turns out that is already happending, by virtue of:

    # add at the end to overwrite eventual tuning options from earlier
    # cpu entries
    cflags-$(CONFIG_X86_GENERIC) += $(call tune,generic,$(call tune,i686))

    -mtune=generic on 32-bit CPUs disable NOPL generation, and any
    gcc/binutils combo too old to have -mtune=generic won't generate them at
    all.

    I think I verified this some time in the past, but I just had to refresh
    my memory. This was a major reason to put this functionality on
    CONFIG_X86_GENERIC.

    -hpa


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