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linux/include/asm-generic/numa.h

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numa: Move numa implementation to common code 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> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-11-18 16:38:26 -08:00
/* 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);
arm64: irq: set the correct node for VMAP stack In current code, init_irq_stacks() will call cpu_to_node(). The cpu_to_node() depends on percpu "numa_node" which is initialized in: arch_call_rest_init() --> rest_init() -- kernel_init() --> kernel_init_freeable() --> smp_prepare_cpus() But init_irq_stacks() is called in init_IRQ() which is before arch_call_rest_init(). So in init_irq_stacks(), the cpu_to_node() does not work, it always return 0. In NUMA, it makes the node 1 cpu accesses the IRQ stack which is in the node 0. This patch fixes it by: 1.) export the early_cpu_to_node(), and use it in the init_irq_stacks(). 2.) change init_irq_stacks() to __init function. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Huang Shijie <shijie@os.amperecomputing.com> Link: https://lore.kernel.org/r/20231124031513.81548-1-shijie@os.amperecomputing.com Signed-off-by: Will Deacon <will@kernel.org>
2023-11-24 11:15:13 +08:00
int __init early_cpu_to_node(int cpu);
numa: Move numa implementation to common code 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> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-11-18 16:38:26 -08:00
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) { }
arm64: irq: set the correct node for VMAP stack In current code, init_irq_stacks() will call cpu_to_node(). The cpu_to_node() depends on percpu "numa_node" which is initialized in: arch_call_rest_init() --> rest_init() -- kernel_init() --> kernel_init_freeable() --> smp_prepare_cpus() But init_irq_stacks() is called in init_IRQ() which is before arch_call_rest_init(). So in init_irq_stacks(), the cpu_to_node() does not work, it always return 0. In NUMA, it makes the node 1 cpu accesses the IRQ stack which is in the node 0. This patch fixes it by: 1.) export the early_cpu_to_node(), and use it in the init_irq_stacks(). 2.) change init_irq_stacks() to __init function. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Huang Shijie <shijie@os.amperecomputing.com> Link: https://lore.kernel.org/r/20231124031513.81548-1-shijie@os.amperecomputing.com Signed-off-by: Will Deacon <will@kernel.org>
2023-11-24 11:15:13 +08:00
static inline int early_cpu_to_node(int cpu) { return 0; }
numa: Move numa implementation to common code 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> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-11-18 16:38:26 -08:00
#endif /* CONFIG_NUMA */
#endif /* __ASM_GENERIC_NUMA_H */
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