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| author |   Jeremy Fitzhardinge <jeremy@xensource.com> | 2006-09-25 23:32:25 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-26 08:48:55 -0700 |
| commit | 052e79941a042e5be4feffa03b1fd60d93fb9e9a (patch) | |
| tree | fd3ac24a05029b50a6c6ddfa486ea441b4091806 /include/asm-i386 | |
| parent | [PATCH] x86: roll all the cpuid asm into one __cpuid call (diff) | |
| download | linux-dev-052e79941a042e5be4feffa03b1fd60d93fb9e9a.tar.xz linux-dev-052e79941a042e5be4feffa03b1fd60d93fb9e9a.zip | |
[PATCH] x86: make __FIXADDR_TOP variable to allow it to make space for a hypervisor
Make __FIXADDR_TOP a variable, so that it can be set to not get in the way of
address space a hypervisor may want to reserve.
Original patch by Gerd Hoffmann <kraxel@suse.de>
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Cc: Gerd Hoffmann <kraxel@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-i386')
| -rw-r--r-- | include/asm-i386/fixmap.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/asm-i386/fixmap.h b/include/asm-i386/fixmap.h index a48cc3f7ccc6..02428cb36621 100644 --- a/include/asm-i386/fixmap.h +++ b/include/asm-i386/fixmap.h @@ -19,7 +19,11 @@ * Leave one empty page between vmalloc'ed areas and * the start of the fixmap. */ -#define __FIXADDR_TOP 0xfffff000 +#ifndef CONFIG_COMPAT_VDSO +extern unsigned long __FIXADDR_TOP; +#else +#define __FIXADDR_TOP 0xfffff000 +#endif #ifndef __ASSEMBLY__ #include <linux/kernel.h> @@ -93,6 +97,7 @@ enum fixed_addresses { extern void __set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t flags); +extern void reserve_top_address(unsigned long reserve); #define set_fixmap(idx, phys) \ __set_fixmap(idx, phys, PAGE_KERNEL) |