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| author |   Alex Nixon <alex.nixon@citrix.com> | 2009-02-09 12:05:46 -0800 |
|---|---|---|
| committer |   Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2010-06-07 15:37:53 -0400 |
| commit | 08bbc9da92f7e44b9c208c6a1adba70c403b255e (patch) | |
| tree | 75c6cf9422e03990d1fd280b631d00ea4d4dbe4b /include/xen/xen-ops.h | |
| parent | xen: Rename the balloon lock (diff) | |
| download | linux-dev-08bbc9da92f7e44b9c208c6a1adba70c403b255e.tar.xz linux-dev-08bbc9da92f7e44b9c208c6a1adba70c403b255e.zip | |
xen: Add xen_create_contiguous_region
A memory region must be physically contiguous in order to be accessed
through DMA. This patch adds xen_create_contiguous_region, which
ensures a region of contiguous virtual memory is also physically
contiguous.
Based on Stephen Tweedie's port of the 2.6.18-xen version.
Remove contiguous_bitmap[] as it's no longer needed.
Ported from linux-2.6.18-xen.hg 707:e410857fd83c
[ Impact: add Xen-internal API to make pages phys-contig ]
Signed-off-by: Alex Nixon <alex.nixon@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'include/xen/xen-ops.h')
| -rw-r--r-- | include/xen/xen-ops.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h index 883a21bba24b..d789c937c48a 100644 --- a/include/xen/xen-ops.h +++ b/include/xen/xen-ops.h @@ -14,4 +14,10 @@ void xen_mm_unpin_all(void); void xen_timer_resume(void); void xen_arch_resume(void); +extern unsigned long *xen_contiguous_bitmap; +int xen_create_contiguous_region(unsigned long vstart, unsigned int order, + unsigned int address_bits); + +void xen_destroy_contiguous_region(unsigned long vstart, unsigned int order); + #endif /* INCLUDE_XEN_OPS_H */ |