Messages in this thread | | | From | davej@suse ... | Date | Tue, 17 Oct 2000 00:38:13 +0100 (BST) | Subject | Re: test10-pre3 |
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On Tue, 17 Oct 2000, Mikael Pettersson wrote:
> Since initial Pentium IV processors have model 0 according to Intel's > Pentium IV supplement to the CPUID manual (AP-485), this code may > actually deduce that a Pentium IV has the bug (if the mask < 3).
Valid point. I copied the same fix from 2.2.18pre. Obviously its broken there also.
> --- linux-2.4.0-test10-pre3/arch/i386/kernel/setup.c.~1~ Mon Oct 16 17:29:05 2000 > +++ linux-2.4.0-test10-pre3/arch/i386/kernel/setup.c Mon Oct 16 23:13:21 2000 > @@ -1548,7 +1548,6 @@ > > /* Pentium IV. */ > if (c->x86 == 15) { > - c->x86 = 6; > get_model_name(c); > goto name_decoded; > } > --- linux-2.4.0-test10-pre3/include/asm-i386/bugs.h.~1~ Sat Sep 9 12:49:40 2000 > +++ linux-2.4.0-test10-pre3/include/asm-i386/bugs.h Mon Oct 16 23:14:42 2000 > @@ -426,5 +426,5 @@ > check_pentium_f00f(); > #endif > check_cyrix_coma(); > - system_utsname.machine[1] = '0' + boot_cpu_data.x86; > + system_utsname.machine[1] = '0' + (boot_cpu_data.x86 > 6 ? 6 : boot_cpu_data.x86); > }
Seems more sane to me. Alan, same diff for 2.2 ?
> mtrr.c will need fixing too, but we can't really do that until Intel > releases a new IA-32 System Programming manual with Pentium IV updates.
Agreed.
Why Intel chose family 15 is still beyond me though.
regards,
Dave.
-- | Dave Jones <davej@suse.de> http://www.suse.de/~davej | SuSE Labs
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