On Sun, Jul 24, 2022 at 02:16:23AM -0400, Daniel Dickman wrote: > http://datasheets.chipdb.org/Rise/ > > Quoting the data sheet from this link: > > “The CMPXCHG8B instruction is supported and always enabled on the Rise > mP6 processor; however, the default CPUID function bit is set to 0 to > circumvent a reported bug in Windows NT” > > I don’t think we have a workaround for this quirk so I’m not sure > there’s value in keeping the cpu ID code.
The kernel shows if the CX8 bit is set, but doesn't use it otherwise. The toolchain assumes it exists as we default to -march=i586 since 2020. I'd expect a mP6 to boot just not be as recognised after the diff. Still ok with the original diff.
