Prev: [PATCH 1/6] KVM MMU: remove unused struct
Next: [PATCH 4/6] KVM MMU: optimize for writing cr4
From: Andi Kleen on 12 Apr 2010 04:10
Colin King <colin.king(a)canonical.com> writes:
>
> +static void __init check_atom(void)
> +{
> +
> + /*
> + * Disable 4MB page tables to work around Intel errata AAE44 for
> + * Atom. We cannot guarantee stopping undefined processor behaviour
> + * when two pageing structure translations differ with respect to
> + * page frame sizes. Hence, for Atoms we disable the PSE.
> + */
> + if (boot_cpu_data.x86_model == 0x1c) {

Perhaps someone else pointed that out already, but you obviously
need to check for x86_vendor == X86_VENDOR_INTEL and x86_family == 6 too,
otherwise you'll get false positives.

Besides such workarounds are normally in arch/x86/kernel/cpu/intel.c.
bugs.c is really obsolete.

-Andi

--
ak(a)linux.intel.com -- Speaking for myself only.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo(a)vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
 | 
Pages: 1
Prev: [PATCH 1/6] KVM MMU: remove unused struct
Next: [PATCH 4/6] KVM MMU: optimize for writing cr4