Re: [PATCH] x86 boot time check for cpu features

2000-11-03 Thread davej
On Fri, 3 Nov 2000, Brian Gerst wrote: > > That bug fix is for the earlier Cyrix 6x86 if I'm not mistaken. > > The MII is a different monster. > According to the docs on VIA's site, the MII's cpuid can still be turned > off, but it is on by default at reset. I wouldn't trust the BIOS to not > sc

Re: [PATCH] x86 boot time check for cpu features

2000-11-03 Thread Brian Gerst
[EMAIL PROTECTED] wrote: > > Brian Gerst wrote... > >> I believe the MII always has CPUID enabled. It was the older Cyrixes > >> that did not. DaveJ is the guru.. > > Well, according to comments in bugs.h, some broken BIOSes disable cpuid. > > That bug fix is for the earlier Cyrix 6x86 if I'm no

Re: [PATCH] x86 boot time check for cpu features

2000-11-03 Thread davej
Brian Gerst wrote... >> I believe the MII always has CPUID enabled. It was the older Cyrixes >> that did not. DaveJ is the guru.. > Well, according to comments in bugs.h, some broken BIOSes disable cpuid. That bug fix is for the earlier Cyrix 6x86 if I'm not mistaken. The MII is a different monst

Re: [PATCH] x86 boot time check for cpu features

2000-11-03 Thread davej
Alan Cox wrote.. > > Hmm, after a bit more investigation, it appears that the Cyrix MII > > processors support cmov instructions, even though we currently don't > > compile for that processor with -march=i686. Please ignore this patch > > until I can come up with something better. > I believe t

Re: [PATCH] x86 boot time check for cpu features

2000-11-03 Thread Brian Gerst
Alan Cox wrote: > > > Alan Cox wrote: > > > Q: are any of the things you test present in processors only after we > > > do magic 'cpuid' enable invocations ? > > > > Hmm, after a bit more investigation, it appears that the Cyrix MII > > processors support cmov instructions, even thou

Re: [PATCH] x86 boot time check for cpu features

2000-11-03 Thread Alan Cox
> Alan Cox wrote: > > Q: are any of the things you test present in processors only after we > > do magic 'cpuid' enable invocations ? > > Hmm, after a bit more investigation, it appears that the Cyrix MII > processors support cmov instructions, even though we currently don't > compil

Re: [PATCH] x86 boot time check for cpu features

2000-11-03 Thread Brian Gerst
Alan Cox wrote: > Q: are any of the things you test present in processors only after we > do magic 'cpuid' enable invocations ? Hmm, after a bit more investigation, it appears that the Cyrix MII processors support cmov instructions, even though we currently don't compile for that pro

Re: [PATCH] x86 boot time check for cpu features

2000-11-03 Thread Brian Gerst
Alan Cox wrote: > > > + lea cpuid_fail_msg, %si > > + callprtstr > > +1: jmp 1b > > +cpuid_fail_msg: > > + .string "Required CPU features are not present - compile kernel for the >proper CPU type." > > +cpuid_pass: > > Only one very minor suggestion > > 1: hlt >

Re: [PATCH] x86 boot time check for cpu features

2000-11-03 Thread Alan Cox
> + lea cpuid_fail_msg, %si > + callprtstr > +1: jmp 1b > +cpuid_fail_msg: > + .string "Required CPU features are not present - compile kernel for the proper >CPU type." > +cpuid_pass: Only one very minor suggestion 1: hlt j 1b Q: are any of the thi