| Date | Tue, 09 May 2006 00:00:09 -0700 | From | Chris Wright <> | Subject | [RFC PATCH 09/35] Change __FIXADDR_TOP to leave room for the hypervisor. |
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Move the definition of __FIXADDR_TOP into a subarch include file so that it can be overridden for subarch xen -- the hypervisor needs about 64MB at the top of the address space.
Signed-off-by: Ian Pratt <ian.pratt@xensource.com> Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk> Signed-off-by: Chris Wright <chrisw@sous-sol.org> --- include/asm-i386/fixmap.h | 8 +------- include/asm-i386/mach-default/mach_fixmap.h | 11 +++++++++++ include/asm-i386/mach-xen/mach_fixmap.h | 11 +++++++++++ 3 files changed, 23 insertions(+), 7 deletions(-)
--- linus-2.6.orig/include/asm-i386/fixmap.h +++ linus-2.6/include/asm-i386/fixmap.h @@ -14,13 +14,7 @@ #define _ASM_FIXMAP_H #include <linux/config.h> - -/* used by vmalloc.c, vsyscall.lds.S. - * - * Leave one empty page between vmalloc'ed areas and - * the start of the fixmap. - */ -#define __FIXADDR_TOP 0xfffff000 +#include <mach_fixmap.h> #ifndef __ASSEMBLY__ #include <linux/kernel.h> --- /dev/null +++ linus-2.6/include/asm-i386/mach-default/mach_fixmap.h @@ -0,0 +1,11 @@ +#ifndef __ASM_MACH_FIXMAP_H +#define __ASM_MACH_FIXMAP_H + +/* used by vmalloc.c, vsyscall.lds.S. + * + * Leave one empty page between vmalloc'ed areas and + * the start of the fixmap. + */ +#define __FIXADDR_TOP 0xfffff000 + +#endif /* __ASM_MACH_FIXMAP_H */ --- /dev/null +++ linus-2.6/include/asm-i386/mach-xen/mach_fixmap.h @@ -0,0 +1,11 @@ +#ifndef __ASM_MACH_FIXMAP_H +#define __ASM_MACH_FIXMAP_H + +/* used by vmalloc.c, vsyscall.lds.S. + * + * Leave one empty page between vmalloc'ed areas and + * the start of the fixmap. + */ +#define __FIXADDR_TOP (HYPERVISOR_VIRT_START - 2 * PAGE_SIZE) + +#endif /* __ASM_MACH_FIXMAP_H */ -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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