106c992a5e
Commit abf09bed3c ("s390/mm: implement software dirty bits")
introduced another difference in the pte layout vs. the pmd layout on
s390, thoroughly breaking the s390 support for hugetlbfs. This requires
replacing some more pte_xxx functions in mm/hugetlbfs.c with a
huge_pte_xxx version.
This patch introduces those huge_pte_xxx functions and their generic
implementation in asm-generic/hugetlb.h, which will now be included on
all architectures supporting hugetlbfs apart from s390. This change
will be a no-op for those architectures.
[akpm@linux-foundation.org: fix warning]
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: Hillf Danton <dhillf@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.cz> [for !s390 parts]
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
136 lines
3.2 KiB
C
136 lines
3.2 KiB
C
/*
|
|
* Copyright 2010 Tilera Corporation. All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation, version 2.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
|
|
* NON INFRINGEMENT. See the GNU General Public License for
|
|
* more details.
|
|
*/
|
|
|
|
#ifndef _ASM_TILE_HUGETLB_H
|
|
#define _ASM_TILE_HUGETLB_H
|
|
|
|
#include <asm/page.h>
|
|
#include <asm-generic/hugetlb.h>
|
|
|
|
|
|
static inline int is_hugepage_only_range(struct mm_struct *mm,
|
|
unsigned long addr,
|
|
unsigned long len) {
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* If the arch doesn't supply something else, assume that hugepage
|
|
* size aligned regions are ok without further preparation.
|
|
*/
|
|
static inline int prepare_hugepage_range(struct file *file,
|
|
unsigned long addr, unsigned long len)
|
|
{
|
|
struct hstate *h = hstate_file(file);
|
|
if (len & ~huge_page_mask(h))
|
|
return -EINVAL;
|
|
if (addr & ~huge_page_mask(h))
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
|
|
{
|
|
}
|
|
|
|
static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
|
|
unsigned long addr, unsigned long end,
|
|
unsigned long floor,
|
|
unsigned long ceiling)
|
|
{
|
|
free_pgd_range(tlb, addr, end, floor, ceiling);
|
|
}
|
|
|
|
static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
|
|
pte_t *ptep, pte_t pte)
|
|
{
|
|
set_pte(ptep, pte);
|
|
}
|
|
|
|
static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
|
|
unsigned long addr, pte_t *ptep)
|
|
{
|
|
return ptep_get_and_clear(mm, addr, ptep);
|
|
}
|
|
|
|
static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
|
|
unsigned long addr, pte_t *ptep)
|
|
{
|
|
ptep_clear_flush(vma, addr, ptep);
|
|
}
|
|
|
|
static inline int huge_pte_none(pte_t pte)
|
|
{
|
|
return pte_none(pte);
|
|
}
|
|
|
|
static inline pte_t huge_pte_wrprotect(pte_t pte)
|
|
{
|
|
return pte_wrprotect(pte);
|
|
}
|
|
|
|
static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
|
|
unsigned long addr, pte_t *ptep)
|
|
{
|
|
ptep_set_wrprotect(mm, addr, ptep);
|
|
}
|
|
|
|
static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
|
|
unsigned long addr, pte_t *ptep,
|
|
pte_t pte, int dirty)
|
|
{
|
|
return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
|
|
}
|
|
|
|
static inline pte_t huge_ptep_get(pte_t *ptep)
|
|
{
|
|
return *ptep;
|
|
}
|
|
|
|
static inline int arch_prepare_hugepage(struct page *page)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void arch_release_hugepage(struct page *page)
|
|
{
|
|
}
|
|
|
|
static inline void arch_clear_hugepage_flags(struct page *page)
|
|
{
|
|
}
|
|
|
|
#ifdef CONFIG_HUGETLB_SUPER_PAGES
|
|
static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
|
|
struct page *page, int writable)
|
|
{
|
|
size_t pagesize = huge_page_size(hstate_vma(vma));
|
|
if (pagesize != PUD_SIZE && pagesize != PMD_SIZE)
|
|
entry = pte_mksuper(entry);
|
|
return entry;
|
|
}
|
|
#define arch_make_huge_pte arch_make_huge_pte
|
|
|
|
/* Sizes to scale up page size for PTEs with HV_PTE_SUPER bit. */
|
|
enum {
|
|
HUGE_SHIFT_PGDIR = 0,
|
|
HUGE_SHIFT_PMD = 1,
|
|
HUGE_SHIFT_PAGE = 2,
|
|
HUGE_SHIFT_ENTRIES
|
|
};
|
|
extern int huge_shift[HUGE_SHIFT_ENTRIES];
|
|
#endif
|
|
|
|
#endif /* _ASM_TILE_HUGETLB_H */
|