diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2016-04-29 23:26:30 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-05-11 21:53:57 +1000 |
| commit | bde3eb6222e49673d2ee9dfdc6ab6e7b6ff69e91 (patch) | |
| tree | 197a0e6cd5c9c3919852e626acdb67fcba9d42a7 /arch/powerpc/include/asm/book3s/64/radix.h | |
| parent | 3df33f12be2f6fa88dff12564ab1d069482e3224 (diff) | |
powerpc/mm/radix: Add radix THP callbacks
The deposited pgtable_t is a pte fragment hence we cannot use page->lru
for linking then together. We use the first two 64 bits for pte fragment
as list_head type to link all deposited fragments together. On withdraw
we properly zero then out.
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/radix.h')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/radix.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/radix.h b/arch/powerpc/include/asm/book3s/64/radix.h index f4709024b466..937d4e247ac3 100644 --- a/arch/powerpc/include/asm/book3s/64/radix.h +++ b/arch/powerpc/include/asm/book3s/64/radix.h @@ -196,6 +196,28 @@ static inline int radix__pmd_trans_huge(pmd_t pmd) return !!(pmd_val(pmd) & _PAGE_PTE); } +static inline pmd_t radix__pmd_mkhuge(pmd_t pmd) +{ + return __pmd(pmd_val(pmd) | _PAGE_PTE); +} +static inline void radix__pmdp_huge_split_prepare(struct vm_area_struct *vma, + unsigned long address, pmd_t *pmdp) +{ + /* Nothing to do for radix. */ + return; +} + +extern unsigned long radix__pmd_hugepage_update(struct mm_struct *mm, unsigned long addr, + pmd_t *pmdp, unsigned long clr, + unsigned long set); +extern pmd_t radix__pmdp_collapse_flush(struct vm_area_struct *vma, + unsigned long address, pmd_t *pmdp); +extern void radix__pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp, + pgtable_t pgtable); +extern pgtable_t radix__pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp); +extern pmd_t radix__pmdp_huge_get_and_clear(struct mm_struct *mm, + unsigned long addr, pmd_t *pmdp); +extern int radix__has_transparent_hugepage(void); #endif extern int __meminit radix__vmemmap_create_mapping(unsigned long start, |