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powerpc/mm/book3s-64: Move _PAGE_PTE to 2nd most significant bit

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This changes _PAGE_PTE for 64-bit Book 3S processors from 0x1 to
0x4000_0000_0000_0000, because that bit is used as the L (leaf)
bit by PowerISA v3.0 CPUs in radix mode.  The "leaf" bit indicates
that the PTE points to a page directly rather than another radix
level, which is what the _PAGE_PTE bit means.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Paul Mackerras 2016-02-22 13:41:16 +11:00 committed by Michael Ellerman
parent 849f86a630
commit 84c957560a
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/include/asm/book3s/64/hash.h
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@ -13,7 +13,6 @@
* We could create separate kernel read-only if we used the 3 PP bits
* combinations that newer processors provide but we currently don't.
*/
#define _PAGE_PTE 0x00001 /* distinguishes PTEs from pointers */
#define _PAGE_BIT_SWAP_TYPE 2
#define _PAGE_USER 0x00004 /* page may be accessed by userspace */
#define _PAGE_EXEC 0x00008 /* execute permission */
@ -38,6 +37,7 @@
#define _PAGE_SOFT_DIRTY 0x00000
#endif
#define _PAGE_PTE (1ul << 62) /* distinguishes PTEs from pointers */
#define _PAGE_PRESENT (1ul << 63) /* pte contains a translation */
/*