[PATCH v10 6/8] arm64, mm, numa: Adding numa balancing support for arm64.
From: Ganapatrao Kulkarni <hidden>
Date: 2016-02-02 10:11:45
Also in:
linux-arm-kernel, linux-devicetree, linux-pci, linux-s390, linux-sh, linuxppc-dev, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
enabled numa balancing for arm64 platforms. added pte, pmd protnone helpers for use by automatic NUMA balancing. Reviewed-by: Robert Richter <redacted> Signed-off-by: Ganapatrao Kulkarni <redacted> --- arch/arm64/Kconfig | 1 + arch/arm64/include/asm/pgtable.h | 18 ++++++++++++++++++ 2 files changed, 19 insertions(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index fcf3950..8a7c02a 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 if NUMA 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 2d545d7a..24ce546 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h@@ -347,6 +347,24 @@ static inline pgprot_t mk_sect_prot(pgprot_t prot) return __pgprot(pgprot_val(prot) & ~PTE_TABLE_BIT); } +#ifdef CONFIG_NUMA_BALANCING + +/* + * These work without NUMA balancing but the kernel does not care. 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 /* CONFIG_NUMA_BALANCING */ + /* * THP definitions. */
--
1.8.1.4