[mirror_ubuntu-bionic-kernel.git] / arch / x86 / kernel / setup_percpu.c

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/percpu.h>
#include <linux/kexec.h>
#include <linux/crash_dump.h>
#include <linux/smp.h>
#include <linux/topology.h>
#include <asm/sections.h>
#include <asm/processor.h>
#include <asm/setup.h>
#include <asm/mpspec.h>
#include <asm/apicdef.h>
#include <asm/highmem.h>
#include <asm/proto.h>
#include <asm/cpumask.h>

#ifdef CONFIG_DEBUG_PER_CPU_MAPS
# define DBG(x...) printk(KERN_DEBUG x)
#else
# define DBG(x...)
#endif

#ifdef CONFIG_X86_LOCAL_APIC
unsigned int num_processors;
unsigned disabled_cpus __cpuinitdata;
/* Processor that is doing the boot up */
unsigned int boot_cpu_physical_apicid = -1U;
EXPORT_SYMBOL(boot_cpu_physical_apicid);
unsigned int max_physical_apicid;

/* Bitmask of physically existing CPUs */
physid_mask_t phys_cpu_present_map;
#endif

/*
 * Map cpu index to physical APIC ID
 */
DEFINE_EARLY_PER_CPU(u16, x86_cpu_to_apicid, BAD_APICID);
DEFINE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid, BAD_APICID);
EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_apicid);
EXPORT_EARLY_PER_CPU_SYMBOL(x86_bios_cpu_apicid);

#if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
#define	X86_64_NUMA	1	/* (used later) */

/*
 * Map cpu index to node index
 */
DEFINE_EARLY_PER_CPU(int, x86_cpu_to_node_map, NUMA_NO_NODE);
EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_node_map);

/*
 * Which logical CPUs are on which nodes
 */
cpumask_t *node_to_cpumask_map;
EXPORT_SYMBOL(node_to_cpumask_map);

/*
 * Setup node_to_cpumask_map
 */
static void __init setup_node_to_cpumask_map(void);

#else
static inline void setup_node_to_cpumask_map(void) { }
#endif

/*
 * Define load_pda_offset() and per-cpu __pda for x86_64.
 * load_pda_offset() is responsible for loading the offset of pda into
 * %gs.
 *
 * On SMP, pda offset also duals as percpu base address and thus it
 * should be at the start of per-cpu area.  To achieve this, it's
 * preallocated in vmlinux_64.lds.S directly instead of using
 * DEFINE_PER_CPU().
 */
#ifdef CONFIG_X86_64
void __cpuinit load_pda_offset(int cpu)
{
	/* Memory clobbers used to order pda/percpu accesses */
	mb();
	wrmsrl(MSR_GS_BASE, cpu_pda(cpu));
	mb();
}
#ifndef CONFIG_SMP
DEFINE_PER_CPU(struct x8664_pda, __pda);
#endif
EXPORT_PER_CPU_SYMBOL(__pda);
#endif /* CONFIG_SMP && CONFIG_X86_64 */

#ifdef CONFIG_X86_64

/* correctly size the local cpu masks */
static void setup_cpu_local_masks(void)
{
	alloc_bootmem_cpumask_var(&cpu_initialized_mask);
	alloc_bootmem_cpumask_var(&cpu_callin_mask);
	alloc_bootmem_cpumask_var(&cpu_callout_mask);
	alloc_bootmem_cpumask_var(&cpu_sibling_setup_mask);
}

#else /* CONFIG_X86_32 */

static inline void setup_cpu_local_masks(void)
{
}

#endif /* CONFIG_X86_32 */

#ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA
/*
 * Copy data used in early init routines from the initial arrays to the
 * per cpu data areas.  These arrays then become expendable and the
 * *_early_ptr's are zeroed indicating that the static arrays are gone.
 */
static void __init setup_per_cpu_maps(void)
{
	int cpu;

	for_each_possible_cpu(cpu) {
		per_cpu(x86_cpu_to_apicid, cpu) =
				early_per_cpu_map(x86_cpu_to_apicid, cpu);
		per_cpu(x86_bios_cpu_apicid, cpu) =
				early_per_cpu_map(x86_bios_cpu_apicid, cpu);
#ifdef X86_64_NUMA
		per_cpu(x86_cpu_to_node_map, cpu) =
				early_per_cpu_map(x86_cpu_to_node_map, cpu);
#endif
	}

	/* indicate the early static arrays will soon be gone */
	early_per_cpu_ptr(x86_cpu_to_apicid) = NULL;
	early_per_cpu_ptr(x86_bios_cpu_apicid) = NULL;
#ifdef X86_64_NUMA
	early_per_cpu_ptr(x86_cpu_to_node_map) = NULL;
#endif
}

#ifdef CONFIG_X86_64
unsigned long __per_cpu_offset[NR_CPUS] __read_mostly = {
	[0] = (unsigned long)__per_cpu_load,
};
#else
unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
#endif
EXPORT_SYMBOL(__per_cpu_offset);

/*
 * Great future plan:
 * Declare PDA itself and support (irqstack,tss,pgd) as per cpu data.
 * Always point %gs to its beginning
 */
void __init setup_per_cpu_areas(void)
{
	ssize_t size, old_size;
	char *ptr;
	int cpu;
	unsigned long align = 1;

	/* Copy section for each CPU (we discard the original) */
	old_size = PERCPU_ENOUGH_ROOM;
	align = max_t(unsigned long, PAGE_SIZE, align);
	size = roundup(old_size, align);

	pr_info("NR_CPUS:%d nr_cpumask_bits:%d nr_cpu_ids:%d nr_node_ids:%d\n",
		NR_CPUS, nr_cpumask_bits, nr_cpu_ids, nr_node_ids);

	pr_info("PERCPU: Allocating %zd bytes of per cpu data\n", size);

	for_each_possible_cpu(cpu) {
#ifndef CONFIG_NEED_MULTIPLE_NODES
		ptr = __alloc_bootmem(size, align,
				 __pa(MAX_DMA_ADDRESS));
#else
		int node = early_cpu_to_node(cpu);
		if (!node_online(node) || !NODE_DATA(node)) {
			ptr = __alloc_bootmem(size, align,
					 __pa(MAX_DMA_ADDRESS));
			pr_info("cpu %d has no node %d or node-local memory\n",
				cpu, node);
			pr_debug("per cpu data for cpu%d at %016lx\n",
				 cpu, __pa(ptr));
		} else {
			ptr = __alloc_bootmem_node(NODE_DATA(node), size, align,
							__pa(MAX_DMA_ADDRESS));
			pr_debug("per cpu data for cpu%d on node%d at %016lx\n",
				cpu, node, __pa(ptr));
		}
#endif

		memcpy(ptr, __per_cpu_load, __per_cpu_end - __per_cpu_start);
		per_cpu_offset(cpu) = ptr - __per_cpu_start;
		per_cpu(this_cpu_off, cpu) = per_cpu_offset(cpu);
#ifdef CONFIG_X86_64
		per_cpu(irq_stack_ptr, cpu) =
			(char *)per_cpu(irq_stack, cpu) + IRQ_STACK_SIZE - 64;
		/*
		 * CPU0 modified pda in the init data area, reload pda
		 * offset for CPU0 and clear the area for others.
		 */
		if (cpu == 0)
			load_pda_offset(0);
		else
			memset(cpu_pda(cpu), 0, sizeof(*cpu_pda(cpu)));
#endif

		DBG("PERCPU: cpu %4d %p\n", cpu, ptr);
	}

	/* Setup percpu data maps */
	setup_per_cpu_maps();

	/* Setup node to cpumask map */
	setup_node_to_cpumask_map();

	/* Setup cpu initialized, callin, callout masks */
	setup_cpu_local_masks();
}

#endif

#ifdef X86_64_NUMA

/*
 * Allocate node_to_cpumask_map based on number of available nodes
 * Requires node_possible_map to be valid.
 *
 * Note: node_to_cpumask() is not valid until after this is done.
 * (Use CONFIG_DEBUG_PER_CPU_MAPS to check this.)
 */
static void __init setup_node_to_cpumask_map(void)
{
	unsigned int node, num = 0;
	cpumask_t *map;

	/* setup nr_node_ids if not done yet */
	if (nr_node_ids == MAX_NUMNODES) {
		for_each_node_mask(node, node_possible_map)
			num = node;
		nr_node_ids = num + 1;
	}

	/* allocate the map */
	map = alloc_bootmem_low(nr_node_ids * sizeof(cpumask_t));
	DBG("node_to_cpumask_map at %p for %d nodes\n", map, nr_node_ids);

	pr_debug("Node to cpumask map at %p for %d nodes\n",
		 map, nr_node_ids);

	/* node_to_cpumask() will now work */
	node_to_cpumask_map = map;
}

void __cpuinit numa_set_node(int cpu, int node)
{
	int *cpu_to_node_map = early_per_cpu_ptr(x86_cpu_to_node_map);

	/* early setting, no percpu area yet */
	if (cpu_to_node_map) {
		cpu_to_node_map[cpu] = node;
		return;
	}

#ifdef CONFIG_DEBUG_PER_CPU_MAPS
	if (cpu >= nr_cpu_ids || !per_cpu_offset(cpu)) {
		printk(KERN_ERR "numa_set_node: invalid cpu# (%d)\n", cpu);
		dump_stack();
		return;
	}
#endif
	per_cpu(x86_cpu_to_node_map, cpu) = node;

	if (node != NUMA_NO_NODE)
		cpu_pda(cpu)->nodenumber = node;
}

void __cpuinit numa_clear_node(int cpu)
{
	numa_set_node(cpu, NUMA_NO_NODE);
}

#ifndef CONFIG_DEBUG_PER_CPU_MAPS

void __cpuinit numa_add_cpu(int cpu)
{
	cpu_set(cpu, node_to_cpumask_map[early_cpu_to_node(cpu)]);
}

void __cpuinit numa_remove_cpu(int cpu)
{
	cpu_clear(cpu, node_to_cpumask_map[early_cpu_to_node(cpu)]);
}

#else /* CONFIG_DEBUG_PER_CPU_MAPS */

/*
 * --------- debug versions of the numa functions ---------
 */
static void __cpuinit numa_set_cpumask(int cpu, int enable)
{
	int node = early_cpu_to_node(cpu);
	cpumask_t *mask;
	char buf[64];

	if (node_to_cpumask_map == NULL) {
		printk(KERN_ERR "node_to_cpumask_map NULL\n");
		dump_stack();
		return;
	}

	mask = &node_to_cpumask_map[node];
	if (enable)
		cpu_set(cpu, *mask);
	else
		cpu_clear(cpu, *mask);

	cpulist_scnprintf(buf, sizeof(buf), mask);
	printk(KERN_DEBUG "%s cpu %d node %d: mask now %s\n",
		enable ? "numa_add_cpu" : "numa_remove_cpu", cpu, node, buf);
}

void __cpuinit numa_add_cpu(int cpu)
{
	numa_set_cpumask(cpu, 1);
}

void __cpuinit numa_remove_cpu(int cpu)
{
	numa_set_cpumask(cpu, 0);
}

int cpu_to_node(int cpu)
{
	if (early_per_cpu_ptr(x86_cpu_to_node_map)) {
		printk(KERN_WARNING
			"cpu_to_node(%d): usage too early!\n", cpu);
		dump_stack();
		return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
	}
	return per_cpu(x86_cpu_to_node_map, cpu);
}
EXPORT_SYMBOL(cpu_to_node);

/*
 * Same function as cpu_to_node() but used if called before the
 * per_cpu areas are setup.
 */
int early_cpu_to_node(int cpu)
{
	if (early_per_cpu_ptr(x86_cpu_to_node_map))
		return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];

	if (!per_cpu_offset(cpu)) {
		printk(KERN_WARNING
			"early_cpu_to_node(%d): no per_cpu area!\n", cpu);
		dump_stack();
		return NUMA_NO_NODE;
	}
	return per_cpu(x86_cpu_to_node_map, cpu);
}


/* empty cpumask */
static const cpumask_t cpu_mask_none;

/*
 * Returns a pointer to the bitmask of CPUs on Node 'node'.
 */
const cpumask_t *cpumask_of_node(int node)
{
	if (node_to_cpumask_map == NULL) {
		printk(KERN_WARNING
			"cpumask_of_node(%d): no node_to_cpumask_map!\n",
			node);
		dump_stack();
		return (const cpumask_t *)&cpu_online_map;
	}
	if (node >= nr_node_ids) {
		printk(KERN_WARNING
			"cpumask_of_node(%d): node > nr_node_ids(%d)\n",
			node, nr_node_ids);
		dump_stack();
		return &cpu_mask_none;
	}
	return &node_to_cpumask_map[node];
}
EXPORT_SYMBOL(cpumask_of_node);

/*
 * Returns a bitmask of CPUs on Node 'node'.
 *
 * Side note: this function creates the returned cpumask on the stack
 * so with a high NR_CPUS count, excessive stack space is used.  The
 * node_to_cpumask_ptr function should be used whenever possible.
 */
cpumask_t node_to_cpumask(int node)
{
	if (node_to_cpumask_map == NULL) {
		printk(KERN_WARNING
			"node_to_cpumask(%d): no node_to_cpumask_map!\n", node);
		dump_stack();
		return cpu_online_map;
	}
	if (node >= nr_node_ids) {
		printk(KERN_WARNING
			"node_to_cpumask(%d): node > nr_node_ids(%d)\n",
			node, nr_node_ids);
		dump_stack();
		return cpu_mask_none;
	}
	return node_to_cpumask_map[node];
}
EXPORT_SYMBOL(node_to_cpumask);

/*
 * --------- end of debug versions of the numa functions ---------
 */

#endif /* CONFIG_DEBUG_PER_CPU_MAPS */

#endif /* X86_64_NUMA */
Commit	Line	Data
4fe29a85 GOC	1	#include <linux/kernel.h>
	2	#include <linux/module.h>
	3	#include <linux/init.h>
	4	#include <linux/bootmem.h>
	5	#include <linux/percpu.h>
1ecd2765	6	#include <linux/kexec.h>
17b4cceb	7	#include <linux/crash_dump.h>
8a87dd9a JSR	8	#include <linux/smp.h>
8a87dd9a JSR	9	#include <linux/topology.h>
4fe29a85 GOC	10	#include <asm/sections.h>
	11	#include <asm/processor.h>
	12	#include <asm/setup.h>
0fc0906e	13	#include <asm/mpspec.h>
76eb4131	14	#include <asm/apicdef.h>
1ecd2765	15	#include <asm/highmem.h>
1a51e3a0	16	#include <asm/proto.h>
06879033	17	#include <asm/cpumask.h>
76eb4131	18
c90aa894 MT	19	#ifdef CONFIG_DEBUG_PER_CPU_MAPS
	20	# define DBG(x...) printk(KERN_DEBUG x)
	21	#else
	22	# define DBG(x...)
	23	#endif
	24
f8955ebe	25	#ifdef CONFIG_X86_LOCAL_APIC
2fe60147 AS	26	unsigned int num_processors;
	27	unsigned disabled_cpus __cpuinitdata;
	28	/* Processor that is doing the boot up */
	29	unsigned int boot_cpu_physical_apicid = -1U;
	30	EXPORT_SYMBOL(boot_cpu_physical_apicid);
8a87dd9a	31	unsigned int max_physical_apicid;
2fe60147	32
0fc0906e AS	33	/* Bitmask of physically existing CPUs */
0fc0906e AS	34	physid_mask_t phys_cpu_present_map;
f8955ebe	35	#endif
0fc0906e	36
c90aa894 MT	37	/*
	38	* Map cpu index to physical APIC ID
	39	*/
23ca4bba MT	40	DEFINE_EARLY_PER_CPU(u16, x86_cpu_to_apicid, BAD_APICID);
	41	DEFINE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid, BAD_APICID);
	42	EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_apicid);
	43	EXPORT_EARLY_PER_CPU_SYMBOL(x86_bios_cpu_apicid);
	44
	45	#if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
c90aa894	46	#define X86_64_NUMA 1 /* (used later) */
23ca4bba	47
c90aa894 MT	48	/*
	49	* Map cpu index to node index
	50	*/
23ca4bba MT	51	DEFINE_EARLY_PER_CPU(int, x86_cpu_to_node_map, NUMA_NO_NODE);
23ca4bba MT	52	EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_node_map);
9f248bde	53
c90aa894 MT	54	/*
	55	* Which logical CPUs are on which nodes
	56	*/
9f248bde MT	57	cpumask_t *node_to_cpumask_map;
	58	EXPORT_SYMBOL(node_to_cpumask_map);
	59
c90aa894 MT	60	/*
	61	* Setup node_to_cpumask_map
	62	*/
9f248bde MT	63	static void __init setup_node_to_cpumask_map(void);
	64
	65	#else
	66	static inline void setup_node_to_cpumask_map(void) { }
23ca4bba MT	67	#endif
23ca4bba MT	68
b12d8db8 TH	69	/*
	70	* Define load_pda_offset() and per-cpu __pda for x86_64.
	71	* load_pda_offset() is responsible for loading the offset of pda into
	72	* %gs.
	73	*
	74	* On SMP, pda offset also duals as percpu base address and thus it
	75	* should be at the start of per-cpu area. To achieve this, it's
	76	* preallocated in vmlinux_64.lds.S directly instead of using
	77	* DEFINE_PER_CPU().
	78	*/
1a51e3a0 TH	79	#ifdef CONFIG_X86_64
	80	void __cpuinit load_pda_offset(int cpu)
	81	{
	82	/* Memory clobbers used to order pda/percpu accesses */
	83	mb();
	84	wrmsrl(MSR_GS_BASE, cpu_pda(cpu));
	85	mb();
	86	}
b12d8db8 TH	87	#ifndef CONFIG_SMP
b12d8db8 TH	88	DEFINE_PER_CPU(struct x8664_pda, __pda);
b12d8db8	89	#endif
a338af2c	90	EXPORT_PER_CPU_SYMBOL(__pda);
1a51e3a0 TH	91	#endif /* CONFIG_SMP && CONFIG_X86_64 */
	92
	93	#ifdef CONFIG_X86_64
	94
	95	/* correctly size the local cpu masks */
	96	static void setup_cpu_local_masks(void)
	97	{
	98	alloc_bootmem_cpumask_var(&cpu_initialized_mask);
	99	alloc_bootmem_cpumask_var(&cpu_callin_mask);
	100	alloc_bootmem_cpumask_var(&cpu_callout_mask);
	101	alloc_bootmem_cpumask_var(&cpu_sibling_setup_mask);
	102	}
	103
	104	#else /* CONFIG_X86_32 */
	105
	106	static inline void setup_cpu_local_masks(void)
	107	{
	108	}
	109
	110	#endif /* CONFIG_X86_32 */
	111
c90aa894	112	#ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA
4fe29a85 GOC	113	/*
	114	* Copy data used in early init routines from the initial arrays to the
	115	* per cpu data areas. These arrays then become expendable and the
	116	* *_early_ptr's are zeroed indicating that the static arrays are gone.
	117	*/
	118	static void __init setup_per_cpu_maps(void)
	119	{
	120	int cpu;
	121
	122	for_each_possible_cpu(cpu) {
23ca4bba MT	123	per_cpu(x86_cpu_to_apicid, cpu) =
23ca4bba MT	124	early_per_cpu_map(x86_cpu_to_apicid, cpu);
b447a468	125	per_cpu(x86_bios_cpu_apicid, cpu) =
23ca4bba MT	126	early_per_cpu_map(x86_bios_cpu_apicid, cpu);
23ca4bba MT	127	#ifdef X86_64_NUMA
b447a468	128	per_cpu(x86_cpu_to_node_map, cpu) =
23ca4bba	129	early_per_cpu_map(x86_cpu_to_node_map, cpu);
4fe29a85 GOC	130	#endif
	131	}
	132
	133	/* indicate the early static arrays will soon be gone */
23ca4bba MT	134	early_per_cpu_ptr(x86_cpu_to_apicid) = NULL;
	135	early_per_cpu_ptr(x86_bios_cpu_apicid) = NULL;
	136	#ifdef X86_64_NUMA
	137	early_per_cpu_ptr(x86_cpu_to_node_map) = NULL;
4fe29a85 GOC	138	#endif
	139	}
	140
9939ddaf TH	141	#ifdef CONFIG_X86_64
	142	unsigned long __per_cpu_offset[NR_CPUS] __read_mostly = {
	143	[0] = (unsigned long)__per_cpu_load,
	144	};
	145	#else
4fe29a85	146	unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
1a51e3a0	147	#endif
9939ddaf	148	EXPORT_SYMBOL(__per_cpu_offset);
4fe29a85 GOC	149
	150	/*
	151	* Great future plan:
	152	* Declare PDA itself and support (irqstack,tss,pgd) as per cpu data.
	153	* Always point %gs to its beginning
	154	*/
	155	void __init setup_per_cpu_areas(void)
	156	{
d6c88a50	157	ssize_t size, old_size;
3461b0af MT	158	char *ptr;
3461b0af MT	159	int cpu;
1f8ff037	160	unsigned long align = 1;
4fe29a85	161
4fe29a85	162	/* Copy section for each CPU (we discard the original) */
1f3fcd4b	163	old_size = PERCPU_ENOUGH_ROOM;
1f8ff037	164	align = max_t(unsigned long, PAGE_SIZE, align);
d6c88a50	165	size = roundup(old_size, align);
a1681965	166
ab14398a	167	pr_info("NR_CPUS:%d nr_cpumask_bits:%d nr_cpu_ids:%d nr_node_ids:%d\n",
a1681965 MT	168	NR_CPUS, nr_cpumask_bits, nr_cpu_ids, nr_node_ids);
a1681965 MT	169
ab14398a	170	pr_info("PERCPU: Allocating %zd bytes of per cpu data\n", size);
b447a468	171
3461b0af	172	for_each_possible_cpu(cpu) {
4fe29a85	173	#ifndef CONFIG_NEED_MULTIPLE_NODES
1f8ff037 YL	174	ptr = __alloc_bootmem(size, align,
1f8ff037 YL	175	__pa(MAX_DMA_ADDRESS));
4fe29a85	176	#else
3461b0af	177	int node = early_cpu_to_node(cpu);
b447a468	178	if (!node_online(node) \|\| !NODE_DATA(node)) {
1f8ff037 YL	179	ptr = __alloc_bootmem(size, align,
1f8ff037 YL	180	__pa(MAX_DMA_ADDRESS));
ab14398a	181	pr_info("cpu %d has no node %d or node-local memory\n",
3461b0af	182	cpu, node);
ab14398a CG	183	pr_debug("per cpu data for cpu%d at %016lx\n",
	184	cpu, __pa(ptr));
	185	} else {
1f8ff037 YL	186	ptr = __alloc_bootmem_node(NODE_DATA(node), size, align,
1f8ff037 YL	187	__pa(MAX_DMA_ADDRESS));
ab14398a CG	188	pr_debug("per cpu data for cpu%d on node%d at %016lx\n",
ab14398a CG	189	cpu, node, __pa(ptr));
a677f58a	190	}
4fe29a85	191	#endif
1a51e3a0	192
3e5d8f97	193	memcpy(ptr, __per_cpu_load, __per_cpu_end - __per_cpu_start);
9939ddaf	194	per_cpu_offset(cpu) = ptr - __per_cpu_start;
26f80bd6	195	per_cpu(this_cpu_off, cpu) = per_cpu_offset(cpu);
1a51e3a0	196	#ifdef CONFIG_X86_64
26f80bd6 BG	197	per_cpu(irq_stack_ptr, cpu) =
26f80bd6 BG	198	(char *)per_cpu(irq_stack, cpu) + IRQ_STACK_SIZE - 64;
1a51e3a0 TH	199	/*
	200	* CPU0 modified pda in the init data area, reload pda
	201	* offset for CPU0 and clear the area for others.
	202	*/
	203	if (cpu == 0)
	204	load_pda_offset(0);
	205	else
	206	memset(cpu_pda(cpu), 0, sizeof(*cpu_pda(cpu)));
	207	#endif
c90aa894 MT	208
c90aa894 MT	209	DBG("PERCPU: cpu %4d %p\n", cpu, ptr);
4fe29a85 GOC	210	}
4fe29a85 GOC	211
b447a468	212	/* Setup percpu data maps */
4fe29a85	213	setup_per_cpu_maps();
9f0e8d04	214
9f248bde MT	215	/* Setup node to cpumask map */
9f248bde MT	216	setup_node_to_cpumask_map();
c2d1cec1 MT	217
	218	/* Setup cpu initialized, callin, callout masks */
	219	setup_cpu_local_masks();
4fe29a85 GOC	220	}
	221
	222	#endif
c45a707d	223
23ca4bba	224	#ifdef X86_64_NUMA
9f248bde MT	225
	226	/*
	227	* Allocate node_to_cpumask_map based on number of available nodes
	228	* Requires node_possible_map to be valid.
	229	*
	230	* Note: node_to_cpumask() is not valid until after this is done.
c90aa894	231	* (Use CONFIG_DEBUG_PER_CPU_MAPS to check this.)
9f248bde MT	232	*/
	233	static void __init setup_node_to_cpumask_map(void)
	234	{
	235	unsigned int node, num = 0;
	236	cpumask_t *map;
	237
	238	/* setup nr_node_ids if not done yet */
	239	if (nr_node_ids == MAX_NUMNODES) {
	240	for_each_node_mask(node, node_possible_map)
	241	num = node;
	242	nr_node_ids = num + 1;
	243	}
	244
	245	/* allocate the map */
	246	map = alloc_bootmem_low(nr_node_ids * sizeof(cpumask_t));
c90aa894	247	DBG("node_to_cpumask_map at %p for %d nodes\n", map, nr_node_ids);
9f248bde	248
55410791	249	pr_debug("Node to cpumask map at %p for %d nodes\n",
cfc1b9a6	250	map, nr_node_ids);
9f248bde MT	251
	252	/* node_to_cpumask() will now work */
	253	node_to_cpumask_map = map;
	254	}
	255
23ca4bba MT	256	void __cpuinit numa_set_node(int cpu, int node)
	257	{
	258	int *cpu_to_node_map = early_per_cpu_ptr(x86_cpu_to_node_map);
	259
c90aa894 MT	260	/* early setting, no percpu area yet */
c90aa894 MT	261	if (cpu_to_node_map) {
23ca4bba	262	cpu_to_node_map[cpu] = node;
c90aa894 MT	263	return;
c90aa894 MT	264	}
23ca4bba	265
c90aa894 MT	266	#ifdef CONFIG_DEBUG_PER_CPU_MAPS
	267	if (cpu >= nr_cpu_ids \|\| !per_cpu_offset(cpu)) {
	268	printk(KERN_ERR "numa_set_node: invalid cpu# (%d)\n", cpu);
	269	dump_stack();
	270	return;
	271	}
	272	#endif
	273	per_cpu(x86_cpu_to_node_map, cpu) = node;
23ca4bba	274
c90aa894 MT	275	if (node != NUMA_NO_NODE)
c90aa894 MT	276	cpu_pda(cpu)->nodenumber = node;
23ca4bba MT	277	}
	278
	279	void __cpuinit numa_clear_node(int cpu)
	280	{
	281	numa_set_node(cpu, NUMA_NO_NODE);
	282	}
	283
9f248bde MT	284	#ifndef CONFIG_DEBUG_PER_CPU_MAPS
9f248bde MT	285
23ca4bba MT	286	void __cpuinit numa_add_cpu(int cpu)
	287	{
	288	cpu_set(cpu, node_to_cpumask_map[early_cpu_to_node(cpu)]);
	289	}
	290
	291	void __cpuinit numa_remove_cpu(int cpu)
	292	{
c90aa894	293	cpu_clear(cpu, node_to_cpumask_map[early_cpu_to_node(cpu)]);
23ca4bba	294	}
23ca4bba	295
9f248bde MT	296	#else /* CONFIG_DEBUG_PER_CPU_MAPS */
	297
	298	/*
	299	* --------- debug versions of the numa functions ---------
	300	*/
	301	static void __cpuinit numa_set_cpumask(int cpu, int enable)
	302	{
c90aa894	303	int node = early_cpu_to_node(cpu);
9f248bde MT	304	cpumask_t *mask;
	305	char buf[64];
	306
	307	if (node_to_cpumask_map == NULL) {
	308	printk(KERN_ERR "node_to_cpumask_map NULL\n");
	309	dump_stack();
	310	return;
	311	}
	312
	313	mask = &node_to_cpumask_map[node];
	314	if (enable)
	315	cpu_set(cpu, *mask);
	316	else
	317	cpu_clear(cpu, *mask);
	318
29c0177e	319	cpulist_scnprintf(buf, sizeof(buf), mask);
9f248bde	320	printk(KERN_DEBUG "%s cpu %d node %d: mask now %s\n",
8a87dd9a JSR	321	enable ? "numa_add_cpu" : "numa_remove_cpu", cpu, node, buf);
8a87dd9a JSR	322	}
9f248bde MT	323
	324	void __cpuinit numa_add_cpu(int cpu)
	325	{
	326	numa_set_cpumask(cpu, 1);
	327	}
	328
	329	void __cpuinit numa_remove_cpu(int cpu)
	330	{
	331	numa_set_cpumask(cpu, 0);
	332	}
23ca4bba MT	333
	334	int cpu_to_node(int cpu)
	335	{
	336	if (early_per_cpu_ptr(x86_cpu_to_node_map)) {
	337	printk(KERN_WARNING
	338	"cpu_to_node(%d): usage too early!\n", cpu);
	339	dump_stack();
	340	return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
	341	}
	342	return per_cpu(x86_cpu_to_node_map, cpu);
	343	}
	344	EXPORT_SYMBOL(cpu_to_node);
	345
9f248bde MT	346	/*
	347	* Same function as cpu_to_node() but used if called before the
	348	* per_cpu areas are setup.
	349	*/
23ca4bba MT	350	int early_cpu_to_node(int cpu)
	351	{
	352	if (early_per_cpu_ptr(x86_cpu_to_node_map))
	353	return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
	354
	355	if (!per_cpu_offset(cpu)) {
	356	printk(KERN_WARNING
	357	"early_cpu_to_node(%d): no per_cpu area!\n", cpu);
9f248bde	358	dump_stack();
23ca4bba MT	359	return NUMA_NO_NODE;
	360	}
	361	return per_cpu(x86_cpu_to_node_map, cpu);
	362	}
9f248bde	363
6a2f47ca MT	364
	365	/* empty cpumask */
	366	static const cpumask_t cpu_mask_none;
	367
9f248bde MT	368	/*
	369	* Returns a pointer to the bitmask of CPUs on Node 'node'.
	370	*/
393d68fb	371	const cpumask_t *cpumask_of_node(int node)
9f248bde MT	372	{
	373	if (node_to_cpumask_map == NULL) {
	374	printk(KERN_WARNING
393d68fb	375	"cpumask_of_node(%d): no node_to_cpumask_map!\n",
9f248bde MT	376	node);
9f248bde MT	377	dump_stack();
11369f35	378	return (const cpumask_t *)&cpu_online_map;
9f248bde	379	}
6a2f47ca MT	380	if (node >= nr_node_ids) {
6a2f47ca MT	381	printk(KERN_WARNING
393d68fb	382	"cpumask_of_node(%d): node > nr_node_ids(%d)\n",
6a2f47ca MT	383	node, nr_node_ids);
6a2f47ca MT	384	dump_stack();
11369f35	385	return &cpu_mask_none;
6a2f47ca	386	}
11369f35	387	return &node_to_cpumask_map[node];
9f248bde	388	}
393d68fb	389	EXPORT_SYMBOL(cpumask_of_node);
9f248bde MT	390
	391	/*
	392	* Returns a bitmask of CPUs on Node 'node'.
6a2f47ca MT	393	*
	394	* Side note: this function creates the returned cpumask on the stack
	395	* so with a high NR_CPUS count, excessive stack space is used. The
	396	* node_to_cpumask_ptr function should be used whenever possible.
9f248bde MT	397	*/
	398	cpumask_t node_to_cpumask(int node)
	399	{
	400	if (node_to_cpumask_map == NULL) {
	401	printk(KERN_WARNING
	402	"node_to_cpumask(%d): no node_to_cpumask_map!\n", node);
	403	dump_stack();
	404	return cpu_online_map;
	405	}
6a2f47ca MT	406	if (node >= nr_node_ids) {
	407	printk(KERN_WARNING
	408	"node_to_cpumask(%d): node > nr_node_ids(%d)\n",
	409	node, nr_node_ids);
	410	dump_stack();
	411	return cpu_mask_none;
	412	}
9f248bde MT	413	return node_to_cpumask_map[node];
	414	}
	415	EXPORT_SYMBOL(node_to_cpumask);
	416
	417	/*
	418	* --------- end of debug versions of the numa functions ---------
	419	*/
	420
	421	#endif /* CONFIG_DEBUG_PER_CPU_MAPS */
	422
	423	#endif /* X86_64_NUMA */
1ecd2765	424