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Commit 84c95756 authored by Paul Mackerras's avatar Paul Mackerras Committed by Michael Ellerman
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powerpc/mm/book3s-64: Move _PAGE_PTE to 2nd most significant bit 



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: default avatarPaul Mackerras <paulus@samba.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 849f86a6

arch/powerpc/include/asm/book3s/64/hash.h

+1 −1
Original line number Diff line number Diff line
@@ -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 */



/*