Messages in this thread Patch in this message | | | Date | Fri, 5 Sep 2008 20:01:16 -0700 | From | "Yinghai Lu" <> | Subject | Re: [git pull] x86 fixes (NOPL issue) |
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On Fri, Sep 5, 2008 at 7:22 PM, H. Peter Anvin <hpa@zytor.com> wrote: > Hi Linus, > > Please pull: > > git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git x86-fixes-for-linus-2 > > H. Peter Anvin (4): > x86: boot: stub out unimplemented CPU feature words diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c > index 80ab20d..0785b3c 100644 > --- a/arch/x86/kernel/cpu/common.c > +++ b/arch/x86/kernel/cpu/common.c > @@ -13,6 +13,7 @@ > #include <asm/mtrr.h> > #include <asm/mce.h> > #include <asm/pat.h> > +#include <asm/asm.h> > #ifdef CONFIG_X86_LOCAL_APIC > #include <asm/mpspec.h> > #include <asm/apic.h> > @@ -341,6 +342,35 @@ static void __init early_cpu_detect(void) > early_get_cap(c); > } > > +/* > + * The NOPL instruction is supposed to exist on all CPUs with > + * family >= 6, unfortunately, that's not true in practice because > + * of early VIA chips and (more importantly) broken virtualizers that > + * are not easy to detect. Hence, probe for it based on first > + * principles. > + */
if so, should only test on VIA chips.
YH
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