From mboxrd@z Thu Jan 1 00:00:00 1970 From: gkulkarni@caviumnetworks.com (Ganapatrao Kulkarni) Date: Tue, 2 Feb 2016 15:39:19 +0530 Subject: [PATCH v10 4/8] arm64, numa : Enable numa dt for arm64 platforms. In-Reply-To: <1454407763-1017-1-git-send-email-gkulkarni@caviumnetworks.com> References: <1454407763-1017-1-git-send-email-gkulkarni@caviumnetworks.com> Message-ID: <1454407763-1017-5-git-send-email-gkulkarni@caviumnetworks.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Adding numa dt binding support for arm64 based platforms. Reviewed-by: Robert Richter Signed-off-by: Ganapatrao Kulkarni --- arch/arm64/include/asm/numa.h | 2 ++ arch/arm64/kernel/smp.c | 2 ++ arch/arm64/mm/numa.c | 17 +++++++++++++++++ 3 files changed, 21 insertions(+) diff --git a/arch/arm64/include/asm/numa.h b/arch/arm64/include/asm/numa.h index 574267f..e9b4f29 100644 --- a/arch/arm64/include/asm/numa.h +++ b/arch/arm64/include/asm/numa.h @@ -31,12 +31,14 @@ void __init arm64_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); #else /* CONFIG_NUMA */ static inline void numa_store_cpu_info(unsigned int cpu) { } static inline void arm64_numa_init(void) { } +static inline void early_map_cpu_to_node(unsigned int cpu, int nid) { } #endif /* CONFIG_NUMA */ diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index d6e7d6a..46c45c8 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -520,6 +520,8 @@ static void __init of_parse_and_init_cpus(void) pr_debug("cpu logical map 0x%llx\n", hwid); cpu_logical_map(cpu_count) = hwid; + + early_map_cpu_to_node(cpu_count, of_node_to_nid(dn)); next: cpu_count++; } diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c index 60f19a2..7aad5d4 100644 --- a/arch/arm64/mm/numa.c +++ b/arch/arm64/mm/numa.c @@ -20,6 +20,7 @@ #include #include #include +#include struct pglist_data *node_data[MAX_NUMNODES] __read_mostly; EXPORT_SYMBOL(node_data); @@ -122,6 +123,15 @@ void numa_store_cpu_info(unsigned int cpu) map_cpu_to_node(cpu, numa_off ? 0 : cpu_to_node_map[cpu]); } +void __init early_map_cpu_to_node(unsigned int cpu, int nid) +{ + /* fallback to node 0 */ + if (nid < 0 || nid >= MAX_NUMNODES) + nid = 0; + + cpu_to_node_map[cpu] = nid; +} + /** * numa_add_memblk - Set node id to memblk * @nid: NUMA node ID of the new memblk @@ -383,5 +393,12 @@ static int __init dummy_numa_init(void) */ void __init arm64_numa_init(void) { + if (!numa_off) { +#ifdef CONFIG_OF_NUMA + if (!numa_init(of_numa_init)) + return; +#endif + } + numa_init(dummy_numa_init); } -- 1.8.1.4