x86, xen: Suppress WP test on Xen
authorJeremy Fitzhardinge <jeremy@goop.org>
Tue, 25 Aug 2009 19:53:02 +0000 (12:53 -0700)
committerH. Peter Anvin <hpa@zytor.com>
Wed, 26 Aug 2009 04:10:32 +0000 (21:10 -0700)
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 <hannemann@nets.rwth-aachen.de>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
arch/x86/xen/enlighten.c

index e90540a46a0bca9ed06d03672010eb19ef648b24..0b755cd7686dafc78b4dbc4da67c8d0eba571ba1 100644 (file)
@@ -1059,6 +1059,7 @@ asmlinkage void __init xen_start_kernel(void)
        /* set up basic CPUID stuff */
        cpu_detect(&new_cpu_data);
        new_cpu_data.hard_math = 1;
+       new_cpu_data.wp_works_ok = 1;
        new_cpu_data.x86_capability[0] = cpuid_edx(1);
 #endif