dect
/
linux-2.6
Archived
13
0
Fork 0
Code Releases Activity

[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>
This commit is contained in:
Jeremy Fitzhardinge 2007-05-02 19:27:13 +02:00 committed by Andi Kleen
parent b239fb2501
commit 90caccb975
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/asm-i386/fixmap.h
View File

@ -83,6 +83,9 @@ enum fixed_addresses {
#endif
#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 */