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x86, xen: Suppress WP test on Xen

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Xen always runs on CPUs which properly support WP enforcement in
privileged mode, so there's no need to test for it.

This also works around a crash reported by Arnd Hannemann, though I
think its just a band-aid for that case.

Reported-by: Arnd Hannemann <[email protected]>
Signed-off-by: Jeremy Fitzhardinge <[email protected]>
Acked-by: Pekka Enberg <[email protected]>
Signed-off-by: H. Peter Anvin <[email protected]>
This commit is contained in:
Jeremy Fitzhardinge authored and H. Peter Anvin committed 2009-08-25 21:10:32 -07:00
1 parent 9c93768866
commit d560bc6157
1 file changed
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arch/x86/xen/enlighten.c
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@@ -1059,6 +1059,7 @@ asmlinkage void __init xen_start_kernel(void)
/* set up basic CPUID stuff */ /* set up basic CPUID stuff */
cpu_detect(&new_cpu_data); cpu_detect(&new_cpu_data);
new_cpu_data.hard_math = 1; new_cpu_data.hard_math = 1;
new_cpu_data.wp_works_ok = 1;
new_cpu_data.x86_capability[0] = cpuid_edx(1); new_cpu_data.x86_capability[0] = cpuid_edx(1);
#endif #endif