diff options
| author | Dave Kleikamp <shaggy@linux.vnet.ibm.com> | 2008-07-07 16:28:52 +0200 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-07-09 08:30:45 +0200 |
| commit | aba46c5027cb59d98052231b36efcbbde9c77a1d (patch) | |
| tree | b69dd362c74db562789d14136294c5fcbb7632e7 /include/asm-powerpc | |
| parent | mm: Allow architectures to define additional protection bits (diff) | |
| download | linux-aba46c5027cb59d98052231b36efcbbde9c77a1d.tar.xz linux-aba46c5027cb59d98052231b36efcbbde9c77a1d.zip | |
powerpc/mm: Define flags for Strong Access Ordering
This patch defines:
- PROT_SAO, which is passed into mmap() and mprotect() in the prot field
- VM_SAO in vma->vm_flags, and
- _PAGE_SAO, the combination of WIMG bits in the pte that enables strong
access ordering for the page.
Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'include/asm-powerpc')
| -rw-r--r-- | include/asm-powerpc/mman.h | 2 | ||||
| -rw-r--r-- | include/asm-powerpc/pgtable-ppc64.h | 3 |
2 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-powerpc/mman.h b/include/asm-powerpc/mman.h index 24cf664a8295..0c46bf2c7d5f 100644 --- a/include/asm-powerpc/mman.h +++ b/include/asm-powerpc/mman.h @@ -10,6 +10,8 @@ * 2 of the License, or (at your option) any later version. */ +#define PROT_SAO 0x10 /* Strong Access Ordering */ + #define MAP_RENAME MAP_ANONYMOUS /* In SunOS terminology */ #define MAP_NORESERVE 0x40 /* don't reserve swap pages */ #define MAP_LOCKED 0x80 diff --git a/include/asm-powerpc/pgtable-ppc64.h b/include/asm-powerpc/pgtable-ppc64.h index b2754d46be44..d09599cccb35 100644 --- a/include/asm-powerpc/pgtable-ppc64.h +++ b/include/asm-powerpc/pgtable-ppc64.h @@ -93,6 +93,9 @@ #define _PAGE_RW 0x0200 /* software: user write access allowed */ #define _PAGE_BUSY 0x0800 /* software: PTE & hash are busy */ +/* Strong Access Ordering */ +#define _PAGE_SAO (_PAGE_WRITETHRU | _PAGE_NO_CACHE | _PAGE_COHERENT) + #define _PAGE_BASE (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_COHERENT) #define _PAGE_WRENABLE (_PAGE_RW | _PAGE_DIRTY) |