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| author |   Jeremy Fitzhardinge <jeremy@goop.org> | 2007-05-02 19:27:13 +0200 |
|---|---|---|
| committer |   Andi Kleen <andi@basil.nowhere.org> | 2007-05-02 19:27:13 +0200 |
| commit | 90caccb9758e88db68a69553689baee38254287b (patch) | |
| tree | d58d07649c62475810cfa527768034163c89eb15 | |
| parent | [PATCH] i386: PARAVIRT: Hooks to set up initial pagetable (diff) | |
| download | linux-dev-90caccb9758e88db68a69553689baee38254287b.tar.xz linux-dev-90caccb9758e88db68a69553689baee38254287b.zip | |
[PATCH] i386: PARAVIRT: Allocate a fixmap slot
Allocate a fixmap slot for use by a paravirt_ops implementation. This
is intended for early-boot bootstrap mappings. Once the zones and
allocator have been set up, it would be better to use get_vm_area() to
allocate some virtual space.
Xen uses this to map the hypervisor's shared info page, which doesn't
have a pseudo-physical page number, and therefore can't be mapped
ordinarily. It is needed early because it contains the vcpu state,
including the interrupt mask.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | include/asm-i386/fixmap.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/asm-i386/fixmap.h b/include/asm-i386/fixmap.h index e5651b2a585a..80ea052ee3a4 100644 --- a/include/asm-i386/fixmap.h +++ b/include/asm-i386/fixmap.h @@ -84,6 +84,9 @@ enum fixed_addresses { #ifdef CONFIG_PCI_MMCONFIG FIX_PCIE_MCFG, #endif +#ifdef CONFIG_PARAVIRT + FIX_PARAVIRT_BOOTMAP, +#endif __end_of_permanent_fixed_addresses, /* temporary boot-time mappings, used before ioremap() is functional */ #define NR_FIX_BTMAPS 16 |