From 561662301eb6a40d569453b3555fc8cfce094b93 Mon Sep 17 00:00:00 2001 From: Ganapatrao Kulkarni Date: Fri, 8 Apr 2016 15:50:28 -0700 Subject: [PATCH] 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: Steve Capper Reviewed-by: Robert Richter Signed-off-by: Ganapatrao Kulkarni Signed-off-by: David Daney Signed-off-by: Will Deacon --- arch/arm64/Kconfig | 1 + arch/arm64/include/asm/pgtable.h | 15 +++++++++++++++ 2 files changed, 16 insertions(+) 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 2abfa4d09e65..3c91b179089a 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -266,6 +266,21 @@ 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. */ -- 2.20.1