Messages in this thread Patch in this message | | | From | Jeremy Fitzhardinge <> | Subject | [PATCH 06/15] xen: disable PAT | Date | Fri, 13 Mar 2009 09:29:47 -0700 |
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From: Ian Campbell <ian.campbell@citrix.com>
Xen imposes a particular PAT layout on all paravirtual guests which does not match the layout Linux would like to use.
Force PAT to be disabled until this is resolved.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com> --- arch/x86/include/asm/pat.h | 5 +++++ arch/x86/mm/pat.c | 5 ----- arch/x86/xen/enlighten.c | 3 +++ 3 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/arch/x86/include/asm/pat.h b/arch/x86/include/asm/pat.h index 2cd07b9..d434a4e 100644 --- a/arch/x86/include/asm/pat.h +++ b/arch/x86/include/asm/pat.h @@ -6,8 +6,13 @@ #ifdef CONFIG_X86_PAT extern int pat_enabled; +extern void pat_disable(const char *reason); #else static const int pat_enabled; +static inline void pat_disable(const char *reason) +{ + (void)reason; +} #endif extern void pat_init(void); diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c index 2ed3715..ea1d6bb 100644 --- a/arch/x86/mm/pat.c +++ b/arch/x86/mm/pat.c @@ -43,11 +43,6 @@ static int __init nopat(char *str) return 0; } early_param("nopat", nopat); -#else -static inline void pat_disable(const char *reason) -{ - (void)reason; -} #endif diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index 19af31b..731c096 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -48,6 +48,7 @@ #include <asm/pgtable.h> #include <asm/tlbflush.h> #include <asm/reboot.h> +#include <asm/pat.h> #include "xen-ops.h" #include "mmu.h" @@ -1029,6 +1030,8 @@ asmlinkage void __init xen_start_kernel(void) add_preferred_console("hvc", 0, NULL); } + pat_disable("PAT disabled on Xen"); + xen_raw_console_write("about to get started...\n"); /* Start the world */ -- 1.6.0.6
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