From: Atish Patra <atish.patra@wdc.com>
To: linux-kernel@vger.kernel.org
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Jonathan Cameron <Jonathan.Cameron@huawei.com>,
Atish Patra <atish.patra@wdc.com>,
linux-riscv@lists.infradead.org, Will Deacon <will@kernel.org>,
Ard Biesheuvel <ardb@kernel.org>,
linux-arch@vger.kernel.org,
Zhengyuan Liu <liuzhengyuan@tj.kylinos.cn>,
Baoquan He <bhe@redhat.com>, Anup Patel <anup@brainfault.org>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Steven Price <steven.price@arm.com>,
Greentime Hu <greentime.hu@sifive.com>,
Albert Ou <aou@eecs.berkeley.edu>, Arnd Bergmann <arnd@arndb.de>,
Anshuman Khandual <anshuman.khandual@arm.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
linux-arm-kernel@lists.infradead.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Andrew Morton <akpm@linux-foundation.org>,
Mike Rapoport <rppt@kernel.org>
Subject: [PATCH v5 2/5] numa: Move numa implementation to common code
Date: Wed, 18 Nov 2020 16:38:26 -0800 [thread overview]
Message-ID: <20201119003829.1282810-3-atish.patra@wdc.com> (raw)
In-Reply-To: <20201119003829.1282810-1-atish.patra@wdc.com>
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 <atish.patra@wdc.com>
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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next prev parent reply other threads:[~2020-11-19 0:40 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-19 0:38 [PATCH v5 0/5] Unify NUMA implementation between ARM64 & RISC-V Atish Patra
2020-11-19 0:38 ` [PATCH v5 1/5] arm64, numa: Change the numa init functions name to be generic Atish Patra
2020-11-19 0:38 ` Atish Patra [this message]
2020-11-19 1:12 ` [PATCH v5 2/5] numa: Move numa implementation to common code Randy Dunlap
2020-11-19 0:38 ` [PATCH v5 3/5] riscv: Separate memory init from paging init Atish Patra
2021-03-10 16:41 ` Geert Uytterhoeven
2021-03-12 15:50 ` Geert Uytterhoeven
2020-11-19 0:38 ` [PATCH v5 4/5] riscv: Add support pte_protnone and pmd_protnone if CONFIG_NUMA_BALANCING Atish Patra
2020-11-19 0:38 ` [PATCH v5 5/5] riscv: Add numa support for riscv64 platform Atish Patra
2020-12-14 1:02 ` [PATCH v5 0/5] Unify NUMA implementation between ARM64 & RISC-V Atish Patra
2021-01-09 20:51 ` Palmer Dabbelt
2021-01-11 19:31 ` Atish Patra
2021-01-14 5:21 ` Palmer Dabbelt
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