On 12/20/2024 4:29 PM, Andrew Cooper wrote: >> >> 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. > You are right. This is indeed the processor type field. I should have spent more time reading the specification than Wikipedia :) > x86_family() will consider this to be family 6 as far as I can see. > On the bright side, we don't have to worry about breaking this CPU. Sohil
