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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2016-04-29 23:26:29 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2016-05-11 21:53:57 +1000
commit3df33f12be2f6fa88dff12564ab1d069482e3224 (patch)
tree70a1a974df6f748741a5768a71c305a370812537 /arch/powerpc/include/asm/book3s/64/pgtable.h
parent6a1ea36260f69f1aea85bbf8afcd6a8c193485b9 (diff)
downloadlinux-3df33f12be2f6fa88dff12564ab1d069482e3224.tar.gz
powerpc/mm/thp: Abstraction for THP functions
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/book3s/64/pgtable.h')
-rw-r--r--arch/powerpc/include/asm/book3s/64/pgtable.h83
1 files changed, 70 insertions, 13 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index dfdd1f4e4cf0..5f290d39e563 100644
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -769,7 +769,6 @@ static inline int __meminit vmemmap_create_mapping(unsigned long start,
static inline void vmemmap_remove_mapping(unsigned long start,
unsigned long page_size)
{
-
if (radix_enabled())
return radix__vmemmap_remove_mapping(start, page_size);
return hash__vmemmap_remove_mapping(start, page_size);
@@ -825,11 +824,52 @@ extern void set_pmd_at(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp, pmd_t pmd);
extern void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
pmd_t *pmd);
-extern int has_transparent_hugepage(void);
+extern int hash__has_transparent_hugepage(void);
+static inline int has_transparent_hugepage(void)
+{
+ return hash__has_transparent_hugepage();
+}
-static inline pmd_t pmd_mkhuge(pmd_t pmd)
+static inline unsigned long
+pmd_hugepage_update(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp,
+ unsigned long clr, unsigned long set)
{
- return __pmd(pmd_val(pmd) | (_PAGE_PTE | H_PAGE_THP_HUGE));
+ return hash__pmd_hugepage_update(mm, addr, pmdp, clr, set);
+}
+
+static inline int pmd_large(pmd_t pmd)
+{
+ return !!(pmd_val(pmd) & _PAGE_PTE);
+}
+
+static inline pmd_t pmd_mknotpresent(pmd_t pmd)
+{
+ return __pmd(pmd_val(pmd) & ~_PAGE_PRESENT);
+}
+/*
+ * For radix we should always find H_PAGE_HASHPTE zero. Hence
+ * the below will work for radix too
+ */
+static inline int __pmdp_test_and_clear_young(struct mm_struct *mm,
+ unsigned long addr, pmd_t *pmdp)
+{
+ unsigned long old;
+
+ if ((pmd_val(*pmdp) & (_PAGE_ACCESSED | H_PAGE_HASHPTE)) == 0)
+ return 0;
+ old = pmd_hugepage_update(mm, addr, pmdp, _PAGE_ACCESSED, 0);
+ return ((old & _PAGE_ACCESSED) != 0);
+}
+
+#define __HAVE_ARCH_PMDP_SET_WRPROTECT
+static inline void pmdp_set_wrprotect(struct mm_struct *mm, unsigned long addr,
+ pmd_t *pmdp)
+{
+
+ if ((pmd_val(*pmdp) & _PAGE_WRITE) == 0)
+ return;
+
+ pmd_hugepage_update(mm, addr, pmdp, _PAGE_WRITE, 0);
}
#define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
@@ -842,26 +882,43 @@ extern int pmdp_test_and_clear_young(struct vm_area_struct *vma,
unsigned long address, pmd_t *pmdp);
#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR
-extern pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
- unsigned long addr, pmd_t *pmdp);
+static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
+ unsigned long addr, pmd_t *pmdp)
+{
+ return hash__pmdp_huge_get_and_clear(mm, addr, pmdp);
+}
-extern pmd_t pmdp_collapse_flush(struct vm_area_struct *vma,
- unsigned long address, pmd_t *pmdp);
+static inline pmd_t pmdp_collapse_flush(struct vm_area_struct *vma,
+ unsigned long address, pmd_t *pmdp)
+{
+ return hash__pmdp_collapse_flush(vma, address, pmdp);
+}
#define pmdp_collapse_flush pmdp_collapse_flush
#define __HAVE_ARCH_PGTABLE_DEPOSIT
-extern void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
- pgtable_t pgtable);
+static inline void pgtable_trans_huge_deposit(struct mm_struct *mm,
+ pmd_t *pmdp, pgtable_t pgtable)
+{
+ return hash__pgtable_trans_huge_deposit(mm, pmdp, pgtable);
+}
+
#define __HAVE_ARCH_PGTABLE_WITHDRAW
-extern pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
+static inline pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm,
+ pmd_t *pmdp)
+{
+ return hash__pgtable_trans_huge_withdraw(mm, pmdp);
+}
#define __HAVE_ARCH_PMDP_INVALIDATE
extern void pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
pmd_t *pmdp);
#define __HAVE_ARCH_PMDP_HUGE_SPLIT_PREPARE
-extern void pmdp_huge_split_prepare(struct vm_area_struct *vma,
- unsigned long address, pmd_t *pmdp);
+static inline void pmdp_huge_split_prepare(struct vm_area_struct *vma,
+ unsigned long address, pmd_t *pmdp)
+{
+ return hash__pmdp_huge_split_prepare(vma, address, pmdp);
+}
#define pmd_move_must_withdraw pmd_move_must_withdraw
struct spinlock;