thp: add pmd mangling generic functions
Some are needed to build but not actually used on archs not supporting transparent hugepages. Others like pmdp_clear_flush are used by x86 too. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Acked-by: Rik van Riel <riel@redhat.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrea Arcangeli
Linus Torvalds
Родитель
5f6e8da70a
Коммит
e2cda32264
|
|
@ -5,67 +5,108 @@
|
|||
#ifdef CONFIG_MMU
|
||||
|
||||
#ifndef __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
|
||||
/*
|
||||
* Largely same as above, but only sets the access flags (dirty,
|
||||
* accessed, and writable). Furthermore, we know it always gets set
|
||||
* to a "more permissive" setting, which allows most architectures
|
||||
* to optimize this. We return whether the PTE actually changed, which
|
||||
* in turn instructs the caller to do things like update__mmu_cache.
|
||||
* This used to be done in the caller, but sparc needs minor faults to
|
||||
* force that call on sun4c so we changed this macro slightly
|
||||
*/
|
||||
#define ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \
|
||||
({ \
|
||||
int __changed = !pte_same(*(__ptep), __entry); \
|
||||
if (__changed) { \
|
||||
set_pte_at((__vma)->vm_mm, (__address), __ptep, __entry); \
|
||||
flush_tlb_page(__vma, __address); \
|
||||
} \
|
||||
__changed; \
|
||||
})
|
||||
extern int ptep_set_access_flags(struct vm_area_struct *vma,
|
||||
unsigned long address, pte_t *ptep,
|
||||
pte_t entry, int dirty);
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
|
||||
extern int pmdp_set_access_flags(struct vm_area_struct *vma,
|
||||
unsigned long address, pmd_t *pmdp,
|
||||
pmd_t entry, int dirty);
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
|
||||
#define ptep_test_and_clear_young(__vma, __address, __ptep) \
|
||||
({ \
|
||||
pte_t __pte = *(__ptep); \
|
||||
int r = 1; \
|
||||
if (!pte_young(__pte)) \
|
||||
r = 0; \
|
||||
else \
|
||||
set_pte_at((__vma)->vm_mm, (__address), \
|
||||
(__ptep), pte_mkold(__pte)); \
|
||||
r; \
|
||||
})
|
||||
static inline int ptep_test_and_clear_young(struct vm_area_struct *vma,
|
||||
unsigned long address,
|
||||
pte_t *ptep)
|
||||
{
|
||||
pte_t pte = *ptep;
|
||||
int r = 1;
|
||||
if (!pte_young(pte))
|
||||
r = 0;
|
||||
else
|
||||
set_pte_at(vma->vm_mm, address, ptep, pte_mkold(pte));
|
||||
return r;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG
|
||||
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
||||
static inline int pmdp_test_and_clear_young(struct vm_area_struct *vma,
|
||||
unsigned long address,
|
||||
pmd_t *pmdp)
|
||||
{
|
||||
pmd_t pmd = *pmdp;
|
||||
int r = 1;
|
||||
if (!pmd_young(pmd))
|
||||
r = 0;
|
||||
else
|
||||
set_pmd_at(vma->vm_mm, address, pmdp, pmd_mkold(pmd));
|
||||
return r;
|
||||
}
|
||||
#else /* CONFIG_TRANSPARENT_HUGEPAGE */
|
||||
static inline int pmdp_test_and_clear_young(struct vm_area_struct *vma,
|
||||
unsigned long address,
|
||||
pmd_t *pmdp)
|
||||
{
|
||||
BUG();
|
||||
return 0;
|
||||
}
|
||||
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
|
||||
#define ptep_clear_flush_young(__vma, __address, __ptep) \
|
||||
({ \
|
||||
int __young; \
|
||||
__young = ptep_test_and_clear_young(__vma, __address, __ptep); \
|
||||
if (__young) \
|
||||
flush_tlb_page(__vma, __address); \
|
||||
__young; \
|
||||
})
|
||||
int ptep_clear_flush_young(struct vm_area_struct *vma,
|
||||
unsigned long address, pte_t *ptep);
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
|
||||
int pmdp_clear_flush_young(struct vm_area_struct *vma,
|
||||
unsigned long address, pmd_t *pmdp);
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PTEP_GET_AND_CLEAR
|
||||
#define ptep_get_and_clear(__mm, __address, __ptep) \
|
||||
({ \
|
||||
pte_t __pte = *(__ptep); \
|
||||
pte_clear((__mm), (__address), (__ptep)); \
|
||||
__pte; \
|
||||
static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
|
||||
unsigned long address,
|
||||
pte_t *ptep)
|
||||
{
|
||||
pte_t pte = *ptep;
|
||||
pte_clear(mm, address, ptep);
|
||||
return pte;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PMDP_GET_AND_CLEAR
|
||||
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
||||
static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm,
|
||||
unsigned long address,
|
||||
pmd_t *pmdp)
|
||||
{
|
||||
pmd_t pmd = *pmdp;
|
||||
pmd_clear(mm, address, pmdp);
|
||||
return pmd;
|
||||
})
|
||||
#else /* CONFIG_TRANSPARENT_HUGEPAGE */
|
||||
static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm,
|
||||
unsigned long address,
|
||||
pmd_t *pmdp)
|
||||
{
|
||||
BUG();
|
||||
return __pmd(0);
|
||||
}
|
||||
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
|
||||
#define ptep_get_and_clear_full(__mm, __address, __ptep, __full) \
|
||||
({ \
|
||||
pte_t __pte; \
|
||||
__pte = ptep_get_and_clear((__mm), (__address), (__ptep)); \
|
||||
__pte; \
|
||||
})
|
||||
static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
|
||||
unsigned long address, pte_t *ptep,
|
||||
int full)
|
||||
{
|
||||
pte_t pte;
|
||||
pte = ptep_get_and_clear(mm, address, ptep);
|
||||
return pte;
|
||||
}
|
||||
#endif
|
||||
|
||||
/*
|
||||
|
|
@ -74,20 +115,25 @@
|
|||
* not present, or in the process of an address space destruction.
|
||||
*/
|
||||
#ifndef __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL
|
||||
#define pte_clear_not_present_full(__mm, __address, __ptep, __full) \
|
||||
do { \
|
||||
pte_clear((__mm), (__address), (__ptep)); \
|
||||
} while (0)
|
||||
static inline void pte_clear_not_present_full(struct mm_struct *mm,
|
||||
unsigned long address,
|
||||
pte_t *ptep,
|
||||
int full)
|
||||
{
|
||||
pte_clear(mm, address, ptep);
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PTEP_CLEAR_FLUSH
|
||||
#define ptep_clear_flush(__vma, __address, __ptep) \
|
||||
({ \
|
||||
pte_t __pte; \
|
||||
__pte = ptep_get_and_clear((__vma)->vm_mm, __address, __ptep); \
|
||||
flush_tlb_page(__vma, __address); \
|
||||
__pte; \
|
||||
})
|
||||
extern pte_t ptep_clear_flush(struct vm_area_struct *vma,
|
||||
unsigned long address,
|
||||
pte_t *ptep);
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PMDP_CLEAR_FLUSH
|
||||
extern pmd_t pmdp_clear_flush(struct vm_area_struct *vma,
|
||||
unsigned long address,
|
||||
pmd_t *pmdp);
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PTEP_SET_WRPROTECT
|
||||
|
|
@ -99,8 +145,49 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addres
|
|||
}
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PMDP_SET_WRPROTECT
|
||||
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
||||
static inline void pmdp_set_wrprotect(struct mm_struct *mm,
|
||||
unsigned long address, pmd_t *pmdp)
|
||||
{
|
||||
pmd_t old_pmd = *pmdp;
|
||||
set_pmd_at(mm, address, pmdp, pmd_wrprotect(old_pmd));
|
||||
}
|
||||
#else /* CONFIG_TRANSPARENT_HUGEPAGE */
|
||||
static inline void pmdp_set_wrprotect(struct mm_struct *mm,
|
||||
unsigned long address, pmd_t *pmdp)
|
||||
{
|
||||
BUG();
|
||||
}
|
||||
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PMDP_SPLITTING_FLUSH
|
||||
extern pmd_t pmdp_clear_flush(struct vm_area_struct *vma,
|
||||
unsigned long address,
|
||||
pmd_t *pmdp);
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PTE_SAME
|
||||
#define pte_same(A,B) (pte_val(A) == pte_val(B))
|
||||
static inline int pte_same(pte_t pte_a, pte_t pte_b)
|
||||
{
|
||||
return pte_val(pte_a) == pte_val(pte_b);
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PMD_SAME
|
||||
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
||||
static inline int pmd_same(pmd_t pmd_a, pmd_t pmd_b)
|
||||
{
|
||||
return pmd_val(pmd_a) == pmd_val(pmd_b);
|
||||
}
|
||||
#else /* CONFIG_TRANSPARENT_HUGEPAGE */
|
||||
static inline int pmd_same(pmd_t pmd_a, pmd_t pmd_b)
|
||||
{
|
||||
BUG();
|
||||
return 0;
|
||||
}
|
||||
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PAGE_TEST_DIRTY
|
||||
|
|
@ -357,6 +444,13 @@ static inline int pmd_trans_splitting(pmd_t pmd)
|
|||
{
|
||||
return 0;
|
||||
}
|
||||
#ifndef __HAVE_ARCH_PMD_WRITE
|
||||
static inline int pmd_write(pmd_t pmd)
|
||||
{
|
||||
BUG();
|
||||
return 0;
|
||||
}
|
||||
#endif /* __HAVE_ARCH_PMD_WRITE */
|
||||
#endif
|
||||
|
||||
#endif /* !__ASSEMBLY__ */
|
||||
|
|
|
|||
|
|
@ -5,7 +5,7 @@
|
|||
mmu-y := nommu.o
|
||||
mmu-$(CONFIG_MMU) := fremap.o highmem.o madvise.o memory.o mincore.o \
|
||||
mlock.o mmap.o mprotect.o mremap.o msync.o rmap.o \
|
||||
vmalloc.o pagewalk.o
|
||||
vmalloc.o pagewalk.o pgtable-generic.o
|
||||
|
||||
obj-y := bootmem.o filemap.o mempool.o oom_kill.o fadvise.o \
|
||||
maccess.o page_alloc.o page-writeback.o \
|
||||
|
|
|
|||
|
|
@ -0,0 +1,123 @@
|
|||
/*
|
||||
* mm/pgtable-generic.c
|
||||
*
|
||||
* Generic pgtable methods declared in asm-generic/pgtable.h
|
||||
*
|
||||
* Copyright (C) 2010 Linus Torvalds
|
||||
*/
|
||||
|
||||
#include <asm/tlb.h>
|
||||
#include <asm-generic/pgtable.h>
|
||||
|
||||
#ifndef __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
|
||||
/*
|
||||
* Only sets the access flags (dirty, accessed, and
|
||||
* writable). Furthermore, we know it always gets set to a "more
|
||||
* permissive" setting, which allows most architectures to optimize
|
||||
* this. We return whether the PTE actually changed, which in turn
|
||||
* instructs the caller to do things like update__mmu_cache. This
|
||||
* used to be done in the caller, but sparc needs minor faults to
|
||||
* force that call on sun4c so we changed this macro slightly
|
||||
*/
|
||||
int ptep_set_access_flags(struct vm_area_struct *vma,
|
||||
unsigned long address, pte_t *ptep,
|
||||
pte_t entry, int dirty)
|
||||
{
|
||||
int changed = !pte_same(*ptep, entry);
|
||||
if (changed) {
|
||||
set_pte_at(vma->vm_mm, address, ptep, entry);
|
||||
flush_tlb_page(vma, address);
|
||||
}
|
||||
return changed;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
|
||||
int pmdp_set_access_flags(struct vm_area_struct *vma,
|
||||
unsigned long address, pmd_t *pmdp,
|
||||
pmd_t entry, int dirty)
|
||||
{
|
||||
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
||||
int changed = !pmd_same(*pmdp, entry);
|
||||
VM_BUG_ON(address & ~HPAGE_PMD_MASK);
|
||||
if (changed) {
|
||||
set_pmd_at(vma->vm_mm, address, pmdp, entry);
|
||||
flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
|
||||
}
|
||||
return changed;
|
||||
#else /* CONFIG_TRANSPARENT_HUGEPAGE */
|
||||
BUG();
|
||||
return 0;
|
||||
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
|
||||
int ptep_clear_flush_young(struct vm_area_struct *vma,
|
||||
unsigned long address, pte_t *ptep)
|
||||
{
|
||||
int young;
|
||||
young = ptep_test_and_clear_young(vma, address, ptep);
|
||||
if (young)
|
||||
flush_tlb_page(vma, address);
|
||||
return young;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
|
||||
int pmdp_clear_flush_young(struct vm_area_struct *vma,
|
||||
unsigned long address, pmd_t *pmdp)
|
||||
{
|
||||
int young;
|
||||
#ifndef CONFIG_TRANSPARENT_HUGEPAGE
|
||||
BUG();
|
||||
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
|
||||
VM_BUG_ON(address & ~HPAGE_PMD_MASK);
|
||||
young = pmdp_test_and_clear_young(vma, address, pmdp);
|
||||
if (young)
|
||||
flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
|
||||
return young;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PTEP_CLEAR_FLUSH
|
||||
pte_t ptep_clear_flush(struct vm_area_struct *vma, unsigned long address,
|
||||
pte_t *ptep)
|
||||
{
|
||||
pte_t pte;
|
||||
pte = ptep_get_and_clear((vma)->vm_mm, address, ptep);
|
||||
flush_tlb_page(vma, address);
|
||||
return pte;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PMDP_CLEAR_FLUSH
|
||||
pmd_t pmdp_clear_flush(struct vm_area_struct *vma, unsigned long address,
|
||||
pmd_t *pmdp)
|
||||
{
|
||||
pmd_t pmd;
|
||||
#ifndef CONFIG_TRANSPARENT_HUGEPAGE
|
||||
BUG();
|
||||
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
|
||||
VM_BUG_ON(address & ~HPAGE_PMD_MASK);
|
||||
pmd = pmdp_get_and_clear(vma->vm_mm, address, pmdp);
|
||||
flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
|
||||
return pmd;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifndef __HAVE_ARCH_PMDP_SPLITTING_FLUSH
|
||||
pmd_t pmdp_splitting_flush(struct vm_area_struct *vma, unsigned long address,
|
||||
pmd_t *pmdp)
|
||||
{
|
||||
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
||||
pmd_t pmd = pmd_mksplitting(*pmdp);
|
||||
VM_BUG_ON(address & ~HPAGE_PMD_MASK);
|
||||
set_pmd_at(vma->vm_mm, address, pmdp, pmd);
|
||||
/* tlb flush only to serialize against gup-fast */
|
||||
flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
|
||||
#else /* CONFIG_TRANSPARENT_HUGEPAGE */
|
||||
BUG();
|
||||
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
|
||||
}
|
||||
#endif
|
||||
Загрузка…
Ссылка в новой задаче