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authorGanapatrao Kulkarni <gkulkarni@caviumnetworks.com>2016-04-08 15:50:28 -0700
committerGraeme Gregory <graeme.gregory@linaro.org>2016-05-17 12:03:36 +0100
commit9e4b9f7d2036463330267f838a800b4081c45bc1 (patch)
tree200425328bc3e2e8cf4cef2dc8ecbd988e1d477c
parentb77af19fe7ba39f06326c6e5a14bb1a1167e1b37 (diff)
downloadleg-kernel-9e4b9f7d2036463330267f838a800b4081c45bc1.tar.gz
arm64, mm, numa: Add NUMA balancing support for arm64.
Enable NUMA balancing for arm64 platforms. Add pte, pmd protnone helpers for use by automatic NUMA balancing. Reviewed-by: Robert Richter <rrichter@cavium.com> Signed-off-by: Ganapatrao Kulkarni <gkulkarni@caviumnetworks.com> Signed-off-by: David Daney <david.daney@cavium.com>
-rw-r--r--arch/arm64/Kconfig1
-rw-r--r--arch/arm64/include/asm/pgtable.h15
2 files changed, 16 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 99f9b5554bd1..a578080ae7a0 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -11,6 +11,7 @@ config ARM64
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
select ARCH_USE_CMPXCHG_LOCKREF
select ARCH_SUPPORTS_ATOMIC_RMW
+ select ARCH_SUPPORTS_NUMA_BALANCING
select ARCH_WANT_OPTIONAL_GPIOLIB
select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
select ARCH_WANT_FRAME_POINTERS
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 989fef16d461..89b8f205a14c 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -272,6 +272,21 @@ static inline pgprot_t mk_sect_prot(pgprot_t prot)
return __pgprot(pgprot_val(prot) & ~PTE_TABLE_BIT);
}
+#ifdef CONFIG_NUMA_BALANCING
+/*
+ * See the comment in include/asm-generic/pgtable.h
+ */
+static inline int pte_protnone(pte_t pte)
+{
+ return (pte_val(pte) & (PTE_VALID | PTE_PROT_NONE)) == PTE_PROT_NONE;
+}
+
+static inline int pmd_protnone(pmd_t pmd)
+{
+ return pte_protnone(pmd_pte(pmd));
+}
+#endif
+
/*
* THP definitions.
*/