Messages in this thread Patch in this message | | | Date | Wed, 12 Sep 2007 16:44:42 -0700 | From | Jeremy Fitzhardinge <> | Subject | [PATCH] xen: don't bother trying to set cr4 |
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Xen ignores all updates to cr4, and some versions will kill the domain if you try to change its value. Just ignore all changes.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Andi Kleen <ak@suse.de>
--- arch/i386/xen/enlighten.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
=================================================================== --- a/arch/i386/xen/enlighten.c +++ b/arch/i386/xen/enlighten.c @@ -625,8 +625,8 @@ static unsigned long xen_read_cr2_direct static void xen_write_cr4(unsigned long cr4) { - /* never allow TSC to be disabled */ - native_write_cr4(cr4 & ~X86_CR4_TSD); + /* Just ignore cr4 changes; Xen doesn't allow us to do + anything anyway. */ } static unsigned long xen_read_cr3(void)
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