[PATCH v5 2/5] numa: Move numa implementation to common code
From: Atish Patra <hidden>
Date: 2020-11-19 00:38:59
Also in:
linux-arch, linux-riscv, lkml
Subsystem:
arm64 port (aarch64 architecture), driver core, kobjects, debugfs and sysfs, generic include/asm header files, the rest · Maintainers:
Catalin Marinas, Will Deacon, Greg Kroah-Hartman, "Rafael J. Wysocki", Danilo Krummrich, Arnd Bergmann, Linus Torvalds
ARM64 numa implementation is generic enough that RISC-V can reuse that implementation with very minor cosmetic changes. This will help both ARM64 and RISC-V in terms of maintanace and feature improvement Move the numa implementation code to common directory so that both ISAs can reuse this. This doesn't introduce any function changes for ARM64. Signed-off-by: Atish Patra <redacted> Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Tested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> --- arch/arm64/Kconfig | 1 + arch/arm64/include/asm/numa.h | 48 +---------------- arch/arm64/mm/Makefile | 1 - drivers/base/Kconfig | 6 +++ drivers/base/Makefile | 1 + .../mm/numa.c => drivers/base/arch_numa.c | 0 include/asm-generic/numa.h | 52 +++++++++++++++++++ 7 files changed, 61 insertions(+), 48 deletions(-) rename arch/arm64/mm/numa.c => drivers/base/arch_numa.c (100%) create mode 100644 include/asm-generic/numa.h
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 1515f6f153a0..4ebef80274fd 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig@@ -990,6 +990,7 @@ config HOTPLUG_CPU # Common NUMA Features config NUMA bool "NUMA Memory Allocation and Scheduler Support" + select GENERIC_ARCH_NUMA select ACPI_NUMA if ACPI select OF_NUMA help
diff --git a/arch/arm64/include/asm/numa.h b/arch/arm64/include/asm/numa.h
index ffc1dcdf1871..8c8cf4297cc3 100644
--- a/arch/arm64/include/asm/numa.h
+++ b/arch/arm64/include/asm/numa.h@@ -3,52 +3,6 @@ #define __ASM_NUMA_H #include <asm/topology.h> - -#ifdef CONFIG_NUMA - -#define NR_NODE_MEMBLKS (MAX_NUMNODES * 2) - -int __node_distance(int from, int to); -#define node_distance(a, b) __node_distance(a, b) - -extern nodemask_t numa_nodes_parsed __initdata; - -extern bool numa_off; - -/* Mappings between node number and cpus on that node. */ -extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES]; -void numa_clear_node(unsigned int cpu); - -#ifdef CONFIG_DEBUG_PER_CPU_MAPS -const struct cpumask *cpumask_of_node(int node); -#else -/* Returns a pointer to the cpumask of CPUs on Node 'node'. */ -static inline const struct cpumask *cpumask_of_node(int node) -{ - if (node == NUMA_NO_NODE) - return cpu_all_mask; - - return node_to_cpumask_map[node]; -} -#endif - -void __init arch_numa_init(void); -int __init numa_add_memblk(int nodeid, u64 start, u64 end); -void __init numa_set_distance(int from, int to, int distance); -void __init numa_free_distance(void); -void __init early_map_cpu_to_node(unsigned int cpu, int nid); -void numa_store_cpu_info(unsigned int cpu); -void numa_add_cpu(unsigned int cpu); -void numa_remove_cpu(unsigned int cpu); - -#else /* CONFIG_NUMA */ - -static inline void numa_store_cpu_info(unsigned int cpu) { } -static inline void numa_add_cpu(unsigned int cpu) { } -static inline void numa_remove_cpu(unsigned int cpu) { } -static inline void arch_numa_init(void) { } -static inline void early_map_cpu_to_node(unsigned int cpu, int nid) { } - -#endif /* CONFIG_NUMA */ +#include <asm-generic/numa.h> #endif /* __ASM_NUMA_H */
diff --git a/arch/arm64/mm/Makefile b/arch/arm64/mm/Makefile
index 5ead3c3de3b6..cd60e4fed78f 100644
--- a/arch/arm64/mm/Makefile
+++ b/arch/arm64/mm/Makefile@@ -6,7 +6,6 @@ obj-y := dma-mapping.o extable.o fault.o init.o \ obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o obj-$(CONFIG_PTDUMP_CORE) += ptdump.o obj-$(CONFIG_PTDUMP_DEBUGFS) += ptdump_debugfs.o -obj-$(CONFIG_NUMA) += numa.o obj-$(CONFIG_DEBUG_VIRTUAL) += physaddr.o obj-$(CONFIG_ARM64_MTE) += mteswap.o KASAN_SANITIZE_physaddr.o += n
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index 8d7001712062..c5956c8845cc 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig@@ -210,4 +210,10 @@ config GENERIC_ARCH_TOPOLOGY appropriate scaling, sysfs interface for reading capacity values at runtime. +config GENERIC_ARCH_NUMA + bool + help + Enable support for generic NUMA implementation. Currently, RISC-V + and ARM64 uses it. + endmenu
diff --git a/drivers/base/Makefile b/drivers/base/Makefile
index 41369fc7004f..7d65ea07de65 100644
--- a/drivers/base/Makefile
+++ b/drivers/base/Makefile@@ -23,6 +23,7 @@ obj-$(CONFIG_PINCTRL) += pinctrl.o obj-$(CONFIG_DEV_COREDUMP) += devcoredump.o obj-$(CONFIG_GENERIC_MSI_IRQ_DOMAIN) += platform-msi.o obj-$(CONFIG_GENERIC_ARCH_TOPOLOGY) += arch_topology.o +obj-$(CONFIG_GENERIC_ARCH_NUMA) += arch_numa.o obj-y += test/
diff --git a/arch/arm64/mm/numa.c b/drivers/base/arch_numa.c
similarity index 100%
rename from arch/arm64/mm/numa.c
rename to drivers/base/arch_numa.c
diff --git a/include/asm-generic/numa.h b/include/asm-generic/numa.h
new file mode 100644
index 000000000000..1a3ad6d29833
--- /dev/null
+++ b/include/asm-generic/numa.h@@ -0,0 +1,52 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_GENERIC_NUMA_H +#define __ASM_GENERIC_NUMA_H + +#ifdef CONFIG_NUMA + +#define NR_NODE_MEMBLKS (MAX_NUMNODES * 2) + +int __node_distance(int from, int to); +#define node_distance(a, b) __node_distance(a, b) + +extern nodemask_t numa_nodes_parsed __initdata; + +extern bool numa_off; + +/* Mappings between node number and cpus on that node. */ +extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES]; +void numa_clear_node(unsigned int cpu); + +#ifdef CONFIG_DEBUG_PER_CPU_MAPS +const struct cpumask *cpumask_of_node(int node); +#else +/* Returns a pointer to the cpumask of CPUs on Node 'node'. */ +static inline const struct cpumask *cpumask_of_node(int node) +{ + if (node == NUMA_NO_NODE) + return cpu_all_mask; + + return node_to_cpumask_map[node]; +} +#endif + +void __init arch_numa_init(void); +int __init numa_add_memblk(int nodeid, u64 start, u64 end); +void __init numa_set_distance(int from, int to, int distance); +void __init numa_free_distance(void); +void __init early_map_cpu_to_node(unsigned int cpu, int nid); +void numa_store_cpu_info(unsigned int cpu); +void numa_add_cpu(unsigned int cpu); +void numa_remove_cpu(unsigned int cpu); + +#else /* CONFIG_NUMA */ + +static inline void numa_store_cpu_info(unsigned int cpu) { } +static inline void numa_add_cpu(unsigned int cpu) { } +static inline void numa_remove_cpu(unsigned int cpu) { } +static inline void arch_numa_init(void) { } +static inline void early_map_cpu_to_node(unsigned int cpu, int nid) { } + +#endif /* CONFIG_NUMA */ + +#endif /* __ASM_GENERIC_NUMA_H */
--
2.25.1
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