Re: [patch] powerpc: implement pte_special for 64K pages
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: 2008-07-21 01:01:18
On Thu, 2008-07-17 at 12:44 +0200, Nick Piggin wrote:
This can be folded into powerpc-implement-pte_special.patch -- Ben has now freed up a pte bit on 64k pages. Use it for special pte bit. Signed-off-by: Nick Piggin <redacted> ---
Ack. Andrew, will you merge this or do you want me to ? Cheers, Ben.
quoted hunk ↗ jump to hunk
Index: linux-2.6/include/asm-powerpc/pgtable-64k.h ===================================================================--- linux-2.6.orig/include/asm-powerpc/pgtable-64k.h 2008-07-17 18:53:03.000000000 +1000 +++ linux-2.6/include/asm-powerpc/pgtable-64k.h 2008-07-17 20:30:06.000000000 +1000@@ -70,11 +70,12 @@ #define PGDIR_MASK (~(PGDIR_SIZE-1)) /* Additional PTE bits (don't change without checking asm in hash_low.S) */ +#define __HAVE_ARCH_PTE_SPECIAL +#define _PAGE_SPECIAL 0x00000400 /* software: special page */ #define _PAGE_HPTE_SUB 0x0ffff000 /* combo only: sub pages HPTE bits */ #define _PAGE_HPTE_SUB0 0x08000000 /* combo only: first sub page */ #define _PAGE_COMBO 0x10000000 /* this is a combo 4k page */ #define _PAGE_4K_PFN 0x20000000 /* PFN is for a single 4k page */ -#define _PAGE_SPECIAL 0x0 /* don't have enough room for this yet */ /* For 64K page, we don't have a separate _PAGE_HASHPTE bit. Instead, * we set that to be the whole sub-bits mask. The C code will only