> ---Noteworthy quirks--- > Pentium II Overdrive - A unique family number: > Wikipedia says[2], In Intel's "Family/Model/Stepping" scheme, the Pentium II > OverDrive CPU identifies itself as family 6, model 3, though this is > misleading, as it is not based on the family 6/model 3 Klamath core. As > mentioned in the Pentium II Processor update documentation from Intel, > "although this processor has a CPUID of 163xh, it uses a Pentium II processor > CPUID 065xh processor core." > > A dump of the microcode file 06-03-02 shows: > 001/001: sig 0x00001632, pf_mask 0x00, 1998-06-10, rev 0x0002, size 2048 > An archived CPUID dump [3] also says: > CPUID 00000001: 00001632-00000000-00000000-0183FBFF > > That would translate to a family number of 22 (0x16). This aberration is > not explicitly handled anywhere in the kernel so the platform might already > be broken. This series might make it worse for the platform if the latest > kernel works on it by chance. Are you sure? Bits 13:12 are the type field, and the 0x1 you've got is for an OverDrive processor. x86_family() will consider this to be family 6 as far as I can see. ~Andrew
