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x86: do not promote TM3x00/TM5x00 to i686-class

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We have been promoting Transmeta TM3x00/TM5x00 chips to i686-class
based on the notion that they contain all the user-space visible
features of an i686-class chip.  However, this is not actually true:
they lack the EA-taking long NOPs (0F 1F /0).  Since this is a
userspace-visible incompatibility, downgrade these CPUs to the
manufacturer-defined i586 level.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
H. Peter Anvin 2008-02-14 14:51:00 -08:00 committed by Ingo Molnar
parent b02a7f22f3
commit a7ef94e688
1 changed files with 0 additions and 7 deletions
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7
arch/x86/kernel/cpu/transmeta.c
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@ -76,13 +76,6 @@ static void __cpuinit init_transmeta(struct cpuinfo_x86 *c)
/* All Transmeta CPUs have a constant TSC */
set_bit(X86_FEATURE_CONSTANT_TSC, c->x86_capability);
/* If we can run i686 user-space code, call us an i686 */
#define USER686 ((1 << X86_FEATURE_TSC)|\
(1 << X86_FEATURE_CX8)|\
(1 << X86_FEATURE_CMOV))
if (c->x86 == 5 && (c->x86_capability[0] & USER686) == USER686)
c->x86 = 6;
#ifdef CONFIG_SYSCTL
/* randomize_va_space slows us down enormously;
it probably triggers retranslation of x86->native bytecode */