[uml-devel] [patch 29/39] remap_file_pages protection support: ppc64 bits
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From: <hidden>
Date: 2005-08-12 18:52:22
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From: Paul Mackerras <redacted> ppc64 bits for remap_file_pages w/prot (no syscall table). Signed-off-by: Paolo 'Blaisorblade' Giarrusso <redacted> --- linux-2.6.git-paolo/include/asm-ppc64/pgtable.h | 12 +++++++++--- 1 files changed, 9 insertions(+), 3 deletions(-) diff -puN include/asm-ppc64/pgtable.h~rfp-arch-ppc64 include/asm-ppc64/pgtable.h
--- linux-2.6.git/include/asm-ppc64/pgtable.h~rfp-arch-ppc64 2005-08-12 18:42:20.000000000 +0200
+++ linux-2.6.git-paolo/include/asm-ppc64/pgtable.h 2005-08-12 18:42:20.000000000 +0200@@ -62,8 +62,8 @@ */ #define _PAGE_PRESENT 0x0001 /* software: pte contains a translation */ #define _PAGE_USER 0x0002 /* matches one of the PP bits */ -#define _PAGE_FILE 0x0002 /* (!present only) software: pte holds file offset */ #define _PAGE_EXEC 0x0004 /* No execute on POWER4 and newer (we invert) */ +#define _PAGE_FILE 0x0008 /* !present: pte holds file offset */ #define _PAGE_GUARDED 0x0008 #define _PAGE_COHERENT 0x0010 /* M: enforce memory coherence (SMP systems) */ #define _PAGE_NO_CACHE 0x0020 /* I: cache inhibit */
@@ -492,9 +492,15 @@ extern void update_mmu_cache(struct vm_a #define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) }) #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) >> PTE_SHIFT }) #define __swp_entry_to_pte(x) ((pte_t) { (x).val << PTE_SHIFT }) -#define pte_to_pgoff(pte) (pte_val(pte) >> PTE_SHIFT) -#define pgoff_to_pte(off) ((pte_t) {((off) << PTE_SHIFT)|_PAGE_FILE}) + #define PTE_FILE_MAX_BITS (BITS_PER_LONG - PTE_SHIFT) +#define pte_to_pgoff(pte) (pte_val(pte) >> PTE_SHIFT) +#define pte_to_pgprot(pte) \ +__pgprot((pte_val(pte) & (_PAGE_USER|_PAGE_RW|_PAGE_PRESENT)) | _PAGE_ACCESSED) + +#define pgoff_prot_to_pte(off, prot) \ + ((pte_t) { ((off) << PTE_SHIFT) | _PAGE_FILE \ + | (pgprot_val(prot) & (_PAGE_USER|_PAGE_RW)) }) /* * kern_addr_valid is intended to indicate whether an address is a valid
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