diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2016-04-29 23:26:23 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-05-11 21:53:54 +1000 |
| commit | 5ed7ecd08a0807d6d616c3d958402f9c723bb048 (patch) | |
| tree | 416bd1a8321d42861a301e10eecd0f37902fd1d6 /arch/powerpc/include/asm/book3s/64/pgtable.h | |
| parent | a3dece6d69b0ad21b64104dff508c67a1a1f14dd (diff) | |
powerpc/mm: pte_frag abstraction
In this patch we make the number of pte fragments per level 4 page table
page a variable. Radix level 4 table size is 256 bytes and hence we can
have 256 fragments per level 4 page. We don't update the fragment count
in this patch. We need to do performance measurements to find the right
value for fragment count.
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.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h index f5628f96134b..9175a688e70f 100644 --- a/arch/powerpc/include/asm/book3s/64/pgtable.h +++ b/arch/powerpc/include/asm/book3s/64/pgtable.h @@ -177,6 +177,12 @@ extern unsigned long __pgd_val_bits; #define PMD_VAL_BITS __pmd_val_bits #define PUD_VAL_BITS __pud_val_bits #define PGD_VAL_BITS __pgd_val_bits + +extern unsigned long __pte_frag_nr; +#define PTE_FRAG_NR __pte_frag_nr +extern unsigned long __pte_frag_size_shift; +#define PTE_FRAG_SIZE_SHIFT __pte_frag_size_shift +#define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT) /* * Pgtable size used by swapper, init in asm code */ |