tree d58d07649c62475810cfa527768034163c89eb15
parent b239fb2501117bf3aeb4dd6926edd855be92333d
author Jeremy Fitzhardinge <jeremy@goop.org> 1178126833 +0200
committer Andi Kleen <andi@basil.nowhere.org> 1178126833 +0200

[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>