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Diffstat (limited to '')
| -rw-r--r-- | include/linux/numa.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/include/linux/numa.h b/include/linux/numa.h new file mode 100644 index 000000000..cb44cfe2b --- /dev/null +++ b/include/linux/numa.h @@ -0,0 +1,61 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_NUMA_H +#define _LINUX_NUMA_H +#include <linux/types.h> + +#ifdef CONFIG_NODES_SHIFT +#define NODES_SHIFT CONFIG_NODES_SHIFT +#else +#define NODES_SHIFT 0 +#endif + +#define MAX_NUMNODES (1 << NODES_SHIFT) + +#define NUMA_NO_NODE (-1) + +/* optionally keep NUMA memory info available post init */ +#ifdef CONFIG_NUMA_KEEP_MEMINFO +#define __initdata_or_meminfo +#else +#define __initdata_or_meminfo __initdata +#endif + +#ifdef CONFIG_NUMA +#include <linux/printk.h> +#include <asm/sparsemem.h> + +/* Generic implementation available */ +int numa_map_to_online_node(int node); + +#ifndef memory_add_physaddr_to_nid +static inline int memory_add_physaddr_to_nid(u64 start) +{ + pr_info_once("Unknown online node for memory at 0x%llx, assuming node 0\n", + start); + return 0; +} +#endif +#ifndef phys_to_target_node +static inline int phys_to_target_node(u64 start) +{ + pr_info_once("Unknown target node for memory at 0x%llx, assuming node 0\n", + start); + return 0; +} +#endif +#else /* !CONFIG_NUMA */ +static inline int numa_map_to_online_node(int node) +{ + return NUMA_NO_NODE; +} +static inline int memory_add_physaddr_to_nid(u64 start) +{ + return 0; +} +static inline int phys_to_target_node(u64 start) +{ + return 0; +} +#endif + +#endif /* _LINUX_NUMA_H */ |