From 389a3c02496dd1b399bb0efd005e9fa2be24e9ee Mon Sep 17 00:00:00 2001 From: Jeremy Fitzhardinge Date: Tue, 18 Sep 2007 22:46:33 -0700 Subject: [PATCH] xen: don't bother trying to set cr4 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 Cc: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/i386/xen/enlighten.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/i386/xen/enlighten.c b/arch/i386/xen/enlighten.c index f0c37511d8da..f01bfcd4bdee 100644 --- a/arch/i386/xen/enlighten.c +++ b/arch/i386/xen/enlighten.c @@ -623,8 +623,8 @@ static unsigned long xen_read_cr2_direct(void) 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) -- 2.39.5