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    SubjectRe: [boot crash] Re: [tip:x86/mce3] x86, mce: use 64bit machine check code on 32bit
    Hidetoshi Seto wrote:
    > One possibility is: if the BIOS doesn't clear status in banks,
    > new mce codes will try to log such junks.
    > If the junk is totally junk but can be decoded as a valid log with
    > MISCV or ADDRV bit, and if the cpu try to access register which is
    > not implemented (e.g. IA32_MCi_MISC/ADDR), then such access might
    > cause a general protection exception. (ref. ASDM 3A

    The MCA declares if it comes with ADDR or MISC in a status bit
    and the MCA code only accesses these MSRs if these status bits are set.
    Also I believe P3 implemented ADDR at least, likely even MISC.

    The old 32bit MCA code did that too


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