linux/include/asm-x86/numa_64.h
Suresh Siddha 6ec6e0d9f2 srat, x86: add support for nodes spanning other nodes
For example, If the physical address layout on a two node system with 8 GB
memory is something like:
node 0: 0-2GB, 4-6GB
node 1: 2-4GB, 6-8GB

Current kernels fail to boot/detect this NUMA topology.

ACPI SRAT tables can expose such a topology which needs to be supported.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19 19:19:55 +02:00

46 lines
1.1 KiB
C

#ifndef _ASM_X8664_NUMA_H
#define _ASM_X8664_NUMA_H 1
#include <linux/nodemask.h>
#include <asm/apicdef.h>
struct bootnode {
u64 start;
u64 end;
};
extern int compute_hash_shift(struct bootnode *nodes, int numblks,
int *nodeids);
#define ZONE_ALIGN (1UL << (MAX_ORDER+PAGE_SHIFT))
extern void numa_add_cpu(int cpu);
extern void numa_init_array(void);
extern int numa_off;
extern void numa_set_node(int cpu, int node);
extern void srat_reserve_add_area(int nodeid);
extern int hotadd_percent;
extern s16 apicid_to_node[MAX_LOCAL_APIC];
extern void numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn);
extern unsigned long numa_free_all_bootmem(void);
extern void setup_node_bootmem(int nodeid, unsigned long start,
unsigned long end);
#ifdef CONFIG_NUMA
extern void __init init_cpu_to_node(void);
static inline void clear_node_cpumask(int cpu)
{
clear_bit(cpu, (unsigned long *)&node_to_cpumask_map[cpu_to_node(cpu)]);
}
#else
#define init_cpu_to_node() do {} while (0)
#define clear_node_cpumask(cpu) do {} while (0)
#endif
#endif