summaryrefslogtreecommitdiff
path: root/arch/powerpc/include/asm/book3s/64/pgtable.h
diff options
context:
space:
mode:
authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2016-04-29 23:26:23 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2016-05-11 21:53:54 +1000
commit5ed7ecd08a0807d6d616c3d958402f9c723bb048 (patch)
tree416bd1a8321d42861a301e10eecd0f37902fd1d6 /arch/powerpc/include/asm/book3s/64/pgtable.h
parenta3dece6d69b0ad21b64104dff508c67a1a1f14dd (diff)
downloadlinux-5ed7ecd08a0807d6d616c3d958402f9c723bb048.tar.gz
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.h6
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
*/