[linux-2.6-block.git] / arch / x86 / kernel / setup_percpu.c

// SPDX-License-Identifier: GPL-2.0
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/export.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 <linux/pfn.h>
#include <asm/sections.h>
#include <asm/processor.h>
#include <asm/desc.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>
#include <asm/cpu.h>
#include <asm/stackprotector.h>

DEFINE_PER_CPU_READ_MOSTLY(int, cpu_number);
EXPORT_PER_CPU_SYMBOL(cpu_number);

#ifdef CONFIG_X86_64
#define BOOT_PERCPU_OFFSET ((unsigned long)__per_cpu_load)
#else
#define BOOT_PERCPU_OFFSET 0
#endif

DEFINE_PER_CPU_READ_MOSTLY(unsigned long, this_cpu_off) = BOOT_PERCPU_OFFSET;
EXPORT_PER_CPU_SYMBOL(this_cpu_off);

unsigned long __per_cpu_offset[NR_CPUS] __ro_after_init = {
	[0 ... NR_CPUS-1] = BOOT_PERCPU_OFFSET,
};
EXPORT_SYMBOL(__per_cpu_offset);

/*
 * On x86_64 symbols referenced from code should be reachable using
 * 32bit relocations.  Reserve space for static percpu variables in
 * modules so that they are always served from the first chunk which
 * is located at the percpu segment base.  On x86_32, anything can
 * address anywhere.  No need to reserve space in the first chunk.
 */
#ifdef CONFIG_X86_64
#define PERCPU_FIRST_CHUNK_RESERVE	PERCPU_MODULE_RESERVE
#else
#define PERCPU_FIRST_CHUNK_RESERVE	0
#endif

#ifdef CONFIG_X86_32
/**
 * pcpu_need_numa - determine percpu allocation needs to consider NUMA
 *
 * If NUMA is not configured or there is only one NUMA node available,
 * there is no reason to consider NUMA.  This function determines
 * whether percpu allocation should consider NUMA or not.
 *
 * RETURNS:
 * true if NUMA should be considered; otherwise, false.
 */
static bool __init pcpu_need_numa(void)
{
#ifdef CONFIG_NEED_MULTIPLE_NODES
	pg_data_t *last = NULL;
	unsigned int cpu;

	for_each_possible_cpu(cpu) {
		int node = early_cpu_to_node(cpu);

		if (node_online(node) && NODE_DATA(node) &&
		    last && last != NODE_DATA(node))
			return true;

		last = NODE_DATA(node);
	}
#endif
	return false;
}
#endif

/**
 * pcpu_alloc_bootmem - NUMA friendly alloc_bootmem wrapper for percpu
 * @cpu: cpu to allocate for
 * @size: size allocation in bytes
 * @align: alignment
 *
 * Allocate @size bytes aligned at @align for cpu @cpu.  This wrapper
 * does the right thing for NUMA regardless of the current
 * configuration.
 *
 * RETURNS:
 * Pointer to the allocated area on success, NULL on failure.
 */
static void * __init pcpu_alloc_bootmem(unsigned int cpu, unsigned long size,
					unsigned long align)
{
	const unsigned long goal = __pa(MAX_DMA_ADDRESS);
#ifdef CONFIG_NEED_MULTIPLE_NODES
	int node = early_cpu_to_node(cpu);
	void *ptr;

	if (!node_online(node) || !NODE_DATA(node)) {
		ptr = __alloc_bootmem_nopanic(size, align, goal);
		pr_info("cpu %d has no node %d or node-local memory\n",
			cpu, node);
		pr_debug("per cpu data for cpu%d %lu bytes at %016lx\n",
			 cpu, size, __pa(ptr));
	} else {
		ptr = __alloc_bootmem_node_nopanic(NODE_DATA(node),
						   size, align, goal);
		pr_debug("per cpu data for cpu%d %lu bytes on node%d at %016lx\n",
			 cpu, size, node, __pa(ptr));
	}
	return ptr;
#else
	return __alloc_bootmem_nopanic(size, align, goal);
#endif
}

/*
 * Helpers for first chunk memory allocation
 */
static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, size_t align)
{
	return pcpu_alloc_bootmem(cpu, size, align);
}

static void __init pcpu_fc_free(void *ptr, size_t size)
{
	free_bootmem(__pa(ptr), size);
}

static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
{
#ifdef CONFIG_NEED_MULTIPLE_NODES
	if (early_cpu_to_node(from) == early_cpu_to_node(to))
		return LOCAL_DISTANCE;
	else
		return REMOTE_DISTANCE;
#else
	return LOCAL_DISTANCE;
#endif
}

static void __init pcpup_populate_pte(unsigned long addr)
{
	populate_extra_pte(addr);
}

static inline void setup_percpu_segment(int cpu)
{
#ifdef CONFIG_X86_32
	struct desc_struct d = GDT_ENTRY_INIT(0x8092, per_cpu_offset(cpu),
					      0xFFFFF);

	write_gdt_entry(get_cpu_gdt_rw(cpu), GDT_ENTRY_PERCPU, &d, DESCTYPE_S);
#endif
}

void __init setup_per_cpu_areas(void)
{
	unsigned int cpu;
	unsigned long delta;
	int rc;

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

	/*
	 * Allocate percpu area.  Embedding allocator is our favorite;
	 * however, on NUMA configurations, it can result in very
	 * sparse unit mapping and vmalloc area isn't spacious enough
	 * on 32bit.  Use page in that case.
	 */
#ifdef CONFIG_X86_32
	if (pcpu_chosen_fc == PCPU_FC_AUTO && pcpu_need_numa())
		pcpu_chosen_fc = PCPU_FC_PAGE;
#endif
	rc = -EINVAL;
	if (pcpu_chosen_fc != PCPU_FC_PAGE) {
		const size_t dyn_size = PERCPU_MODULE_RESERVE +
			PERCPU_DYNAMIC_RESERVE - PERCPU_FIRST_CHUNK_RESERVE;
		size_t atom_size;

		/*
		 * On 64bit, use PMD_SIZE for atom_size so that embedded
		 * percpu areas are aligned to PMD.  This, in the future,
		 * can also allow using PMD mappings in vmalloc area.  Use
		 * PAGE_SIZE on 32bit as vmalloc space is highly contended
		 * and large vmalloc area allocs can easily fail.
		 */
#ifdef CONFIG_X86_64
		atom_size = PMD_SIZE;
#else
		atom_size = PAGE_SIZE;
#endif
		rc = pcpu_embed_first_chunk(PERCPU_FIRST_CHUNK_RESERVE,
					    dyn_size, atom_size,
					    pcpu_cpu_distance,
					    pcpu_fc_alloc, pcpu_fc_free);
		if (rc < 0)
			pr_warning("%s allocator failed (%d), falling back to page size\n",
				   pcpu_fc_names[pcpu_chosen_fc], rc);
	}
	if (rc < 0)
		rc = pcpu_page_first_chunk(PERCPU_FIRST_CHUNK_RESERVE,
					   pcpu_fc_alloc, pcpu_fc_free,
					   pcpup_populate_pte);
	if (rc < 0)
		panic("cannot initialize percpu area (err=%d)", rc);

	/* alrighty, percpu areas up and running */
	delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start;
	for_each_possible_cpu(cpu) {
		per_cpu_offset(cpu) = delta + pcpu_unit_offsets[cpu];
		per_cpu(this_cpu_off, cpu) = per_cpu_offset(cpu);
		per_cpu(cpu_number, cpu) = cpu;
		setup_percpu_segment(cpu);
		setup_stack_canary_segment(cpu);
		/*
		 * 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.
		 */
#ifdef CONFIG_X86_LOCAL_APIC
		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);
		per_cpu(x86_cpu_to_acpiid, cpu) =
			early_per_cpu_map(x86_cpu_to_acpiid, cpu);
#endif
#ifdef CONFIG_X86_32
		per_cpu(x86_cpu_to_logical_apicid, cpu) =
			early_per_cpu_map(x86_cpu_to_logical_apicid, cpu);
#endif
#ifdef CONFIG_X86_64
		per_cpu(irq_stack_ptr, cpu) =
			per_cpu(irq_stack_union.irq_stack, cpu) +
			IRQ_STACK_SIZE;
#endif
#ifdef CONFIG_NUMA
		per_cpu(x86_cpu_to_node_map, cpu) =
			early_per_cpu_map(x86_cpu_to_node_map, cpu);
		/*
		 * Ensure that the boot cpu numa_node is correct when the boot
		 * cpu is on a node that doesn't have memory installed.
		 * Also cpu_up() will call cpu_to_node() for APs when
		 * MEMORY_HOTPLUG is defined, before per_cpu(numa_node) is set
		 * up later with c_init aka intel_init/amd_init.
		 * So set them all (boot cpu and all APs).
		 */
		set_cpu_numa_node(cpu, early_cpu_to_node(cpu));
#endif
		/*
		 * Up to this point, the boot CPU has been using .init.data
		 * area.  Reload any changed state for the boot CPU.
		 */
		if (!cpu)
			switch_to_new_gdt(cpu);
	}

	/* indicate the early static arrays will soon be gone */
#ifdef CONFIG_X86_LOCAL_APIC
	early_per_cpu_ptr(x86_cpu_to_apicid) = NULL;
	early_per_cpu_ptr(x86_bios_cpu_apicid) = NULL;
	early_per_cpu_ptr(x86_cpu_to_acpiid) = NULL;
#endif
#ifdef CONFIG_X86_32
	early_per_cpu_ptr(x86_cpu_to_logical_apicid) = NULL;
#endif
#ifdef CONFIG_NUMA
	early_per_cpu_ptr(x86_cpu_to_node_map) = NULL;
#endif

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

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

	/*
	 * Sync back kernel address range again.  We already did this in
	 * setup_arch(), but percpu data also needs to be available in
	 * the smpboot asm.  We can't reliably pick up percpu mappings
	 * using vmalloc_fault(), because exception dispatch needs
	 * percpu data.
	 *
	 * FIXME: Can the later sync in setup_cpu_entry_areas() replace
	 * this call?
	 */
	sync_initial_page_table();
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
40685236 JP	2	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
40685236 JP	3
4fe29a85	4	#include <linux/kernel.h>
523d0fb4	5	#include <linux/export.h>
4fe29a85 GOC	6	#include <linux/init.h>
	7	#include <linux/bootmem.h>
	8	#include <linux/percpu.h>
1ecd2765	9	#include <linux/kexec.h>
17b4cceb	10	#include <linux/crash_dump.h>
8a87dd9a JSR	11	#include <linux/smp.h>
8a87dd9a JSR	12	#include <linux/topology.h>
5f5d8405	13	#include <linux/pfn.h>
4fe29a85 GOC	14	#include <asm/sections.h>
4fe29a85 GOC	15	#include <asm/processor.h>
523d0fb4	16	#include <asm/desc.h>
4fe29a85	17	#include <asm/setup.h>
0fc0906e	18	#include <asm/mpspec.h>
76eb4131	19	#include <asm/apicdef.h>
1ecd2765	20	#include <asm/highmem.h>
1a51e3a0	21	#include <asm/proto.h>
06879033	22	#include <asm/cpumask.h>
34019be1	23	#include <asm/cpu.h>
60a5317f	24	#include <asm/stackprotector.h>
76eb4131	25
0816b0f0	26	DEFINE_PER_CPU_READ_MOSTLY(int, cpu_number);
ea927906	27	EXPORT_PER_CPU_SYMBOL(cpu_number);
ea927906	28
1688401a BG	29	#ifdef CONFIG_X86_64
	30	#define BOOT_PERCPU_OFFSET ((unsigned long)__per_cpu_load)
	31	#else
	32	#define BOOT_PERCPU_OFFSET 0
	33	#endif
	34
2c773dd3	35	DEFINE_PER_CPU_READ_MOSTLY(unsigned long, this_cpu_off) = BOOT_PERCPU_OFFSET;
1688401a BG	36	EXPORT_PER_CPU_SYMBOL(this_cpu_off);
1688401a BG	37
404f6aac	38	unsigned long __per_cpu_offset[NR_CPUS] __ro_after_init = {
34019be1	39	[0 ... NR_CPUS-1] = BOOT_PERCPU_OFFSET,
9939ddaf	40	};
9939ddaf	41	EXPORT_SYMBOL(__per_cpu_offset);
4fe29a85	42
6b19b0c2 TH	43	/*
	44	* On x86_64 symbols referenced from code should be reachable using
	45	* 32bit relocations. Reserve space for static percpu variables in
	46	* modules so that they are always served from the first chunk which
	47	* is located at the percpu segment base. On x86_32, anything can
	48	* address anywhere. No need to reserve space in the first chunk.
	49	*/
	50	#ifdef CONFIG_X86_64
	51	#define PERCPU_FIRST_CHUNK_RESERVE PERCPU_MODULE_RESERVE
	52	#else
	53	#define PERCPU_FIRST_CHUNK_RESERVE 0
	54	#endif
	55
4518e6a0	56	#ifdef CONFIG_X86_32
89c92151 TH	57	/**
	58	* pcpu_need_numa - determine percpu allocation needs to consider NUMA
	59	*
	60	* If NUMA is not configured or there is only one NUMA node available,
	61	* there is no reason to consider NUMA. This function determines
	62	* whether percpu allocation should consider NUMA or not.
	63	*
	64	* RETURNS:
	65	* true if NUMA should be considered; otherwise, false.
	66	*/
	67	static bool __init pcpu_need_numa(void)
	68	{
	69	#ifdef CONFIG_NEED_MULTIPLE_NODES
	70	pg_data_t *last = NULL;
	71	unsigned int cpu;
	72
	73	for_each_possible_cpu(cpu) {
	74	int node = early_cpu_to_node(cpu);
	75
	76	if (node_online(node) && NODE_DATA(node) &&
	77	last && last != NODE_DATA(node))
	78	return true;
	79
	80	last = NODE_DATA(node);
	81	}
	82	#endif
	83	return false;
	84	}
4518e6a0	85	#endif
89c92151	86
5f5d8405 TH	87	/**
	88	* pcpu_alloc_bootmem - NUMA friendly alloc_bootmem wrapper for percpu
	89	* @cpu: cpu to allocate for
	90	* @size: size allocation in bytes
	91	* @align: alignment
	92	*
	93	* Allocate @size bytes aligned at @align for cpu @cpu. This wrapper
	94	* does the right thing for NUMA regardless of the current
	95	* configuration.
	96	*
	97	* RETURNS:
	98	* Pointer to the allocated area on success, NULL on failure.
	99	*/
	100	static void * __init pcpu_alloc_bootmem(unsigned int cpu, unsigned long size,
	101	unsigned long align)
	102	{
	103	const unsigned long goal = __pa(MAX_DMA_ADDRESS);
	104	#ifdef CONFIG_NEED_MULTIPLE_NODES
	105	int node = early_cpu_to_node(cpu);
	106	void *ptr;
	107
	108	if (!node_online(node) \|\| !NODE_DATA(node)) {
	109	ptr = __alloc_bootmem_nopanic(size, align, goal);
	110	pr_info("cpu %d has no node %d or node-local memory\n",
	111	cpu, node);
	112	pr_debug("per cpu data for cpu%d %lu bytes at %016lx\n",
	113	cpu, size, __pa(ptr));
	114	} else {
	115	ptr = __alloc_bootmem_node_nopanic(NODE_DATA(node),
	116	size, align, goal);
40685236 JP	117	pr_debug("per cpu data for cpu%d %lu bytes on node%d at %016lx\n",
40685236 JP	118	cpu, size, node, __pa(ptr));
5f5d8405 TH	119	}
	120	return ptr;
	121	#else
	122	return __alloc_bootmem_nopanic(size, align, goal);
	123	#endif
	124	}
	125
d4b95f80 TH	126	/*
	127	* Helpers for first chunk memory allocation
	128	*/
3cbc8565	129	static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, size_t align)
d4b95f80	130	{
3cbc8565	131	return pcpu_alloc_bootmem(cpu, size, align);
d4b95f80 TH	132	}
	133
	134	static void __init pcpu_fc_free(void *ptr, size_t size)
	135	{
	136	free_bootmem(__pa(ptr), size);
	137	}
	138
4518e6a0	139	static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
a530b795	140	{
4518e6a0	141	#ifdef CONFIG_NEED_MULTIPLE_NODES
a530b795 TH	142	if (early_cpu_to_node(from) == early_cpu_to_node(to))
	143	return LOCAL_DISTANCE;
	144	else
	145	return REMOTE_DISTANCE;
8ac83757	146	#else
4518e6a0	147	return LOCAL_DISTANCE;
8ac83757	148	#endif
89c92151 TH	149	}
89c92151 TH	150
00ae4064	151	static void __init pcpup_populate_pte(unsigned long addr)
458a3e64 TH	152	{
	153	populate_extra_pte(addr);
	154	}
	155
b2d2f431 BG	156	static inline void setup_percpu_segment(int cpu)
	157	{
	158	#ifdef CONFIG_X86_32
1dd439fe TG	159	struct desc_struct d = GDT_ENTRY_INIT(0x8092, per_cpu_offset(cpu),
1dd439fe TG	160	0xFFFFF);
b2d2f431	161
1dd439fe	162	write_gdt_entry(get_cpu_gdt_rw(cpu), GDT_ENTRY_PERCPU, &d, DESCTYPE_S);
b2d2f431 BG	163	#endif
	164	}
	165
4fe29a85 GOC	166	void __init setup_per_cpu_areas(void)
4fe29a85 GOC	167	{
5f5d8405	168	unsigned int cpu;
11124411	169	unsigned long delta;
fb435d52	170	int rc;
a1681965	171
9b130ad5	172	pr_info("NR_CPUS:%d nr_cpumask_bits:%d nr_cpu_ids:%u nr_node_ids:%d\n",
a1681965	173	NR_CPUS, nr_cpumask_bits, nr_cpu_ids, nr_node_ids);
11124411	174
8ac83757	175	/*
4518e6a0 TH	176	* Allocate percpu area. Embedding allocator is our favorite;
	177	* however, on NUMA configurations, it can result in very
	178	* sparse unit mapping and vmalloc area isn't spacious enough
	179	* on 32bit. Use page in that case.
8ac83757	180	*/
4518e6a0 TH	181	#ifdef CONFIG_X86_32
	182	if (pcpu_chosen_fc == PCPU_FC_AUTO && pcpu_need_numa())
	183	pcpu_chosen_fc = PCPU_FC_PAGE;
	184	#endif
fb435d52	185	rc = -EINVAL;
4518e6a0	186	if (pcpu_chosen_fc != PCPU_FC_PAGE) {
4518e6a0 TH	187	const size_t dyn_size = PERCPU_MODULE_RESERVE +
4518e6a0 TH	188	PERCPU_DYNAMIC_RESERVE - PERCPU_FIRST_CHUNK_RESERVE;
d5e28005 TH	189	size_t atom_size;
	190
	191	/*
	192	* On 64bit, use PMD_SIZE for atom_size so that embedded
	193	* percpu areas are aligned to PMD. This, in the future,
	194	* can also allow using PMD mappings in vmalloc area. Use
	195	* PAGE_SIZE on 32bit as vmalloc space is highly contended
	196	* and large vmalloc area allocs can easily fail.
	197	*/
	198	#ifdef CONFIG_X86_64
	199	atom_size = PMD_SIZE;
	200	#else
	201	atom_size = PAGE_SIZE;
	202	#endif
4518e6a0 TH	203	rc = pcpu_embed_first_chunk(PERCPU_FIRST_CHUNK_RESERVE,
	204	dyn_size, atom_size,
	205	pcpu_cpu_distance,
	206	pcpu_fc_alloc, pcpu_fc_free);
fb435d52	207	if (rc < 0)
40685236	208	pr_warning("%s allocator failed (%d), falling back to page size\n",
4518e6a0	209	pcpu_fc_names[pcpu_chosen_fc], rc);
fa8a7094	210	}
fb435d52	211	if (rc < 0)
4518e6a0 TH	212	rc = pcpu_page_first_chunk(PERCPU_FIRST_CHUNK_RESERVE,
	213	pcpu_fc_alloc, pcpu_fc_free,
	214	pcpup_populate_pte);
fb435d52 TH	215	if (rc < 0)
fb435d52 TH	216	panic("cannot initialize percpu area (err=%d)", rc);
11124411	217
5f5d8405	218	/* alrighty, percpu areas up and running */
11124411 TH	219	delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start;
11124411 TH	220	for_each_possible_cpu(cpu) {
fb435d52	221	per_cpu_offset(cpu) = delta + pcpu_unit_offsets[cpu];
26f80bd6	222	per_cpu(this_cpu_off, cpu) = per_cpu_offset(cpu);
ea927906	223	per_cpu(cpu_number, cpu) = cpu;
b2d2f431	224	setup_percpu_segment(cpu);
60a5317f	225	setup_stack_canary_segment(cpu);
0d77e7f0	226	/*
cf3997f5 TH	227	* Copy data used in early init routines from the
	228	* initial arrays to the per cpu data areas. These
	229	* arrays then become expendable and the *_early_ptr's
	230	* are zeroed indicating that the static arrays are
	231	* gone.
0d77e7f0	232	*/
ec70de8b	233	#ifdef CONFIG_X86_LOCAL_APIC
0d77e7f0	234	per_cpu(x86_cpu_to_apicid, cpu) =
cf3997f5	235	early_per_cpu_map(x86_cpu_to_apicid, cpu);
0d77e7f0	236	per_cpu(x86_bios_cpu_apicid, cpu) =
cf3997f5	237	early_per_cpu_map(x86_bios_cpu_apicid, cpu);
3e9e57fa VK	238	per_cpu(x86_cpu_to_acpiid, cpu) =
3e9e57fa VK	239	early_per_cpu_map(x86_cpu_to_acpiid, cpu);
ec70de8b	240	#endif
4c321ff8 TH	241	#ifdef CONFIG_X86_32
	242	per_cpu(x86_cpu_to_logical_apicid, cpu) =
	243	early_per_cpu_map(x86_cpu_to_logical_apicid, cpu);
	244	#endif
1a51e3a0	245	#ifdef CONFIG_X86_64
26f80bd6	246	per_cpu(irq_stack_ptr, cpu) =
cf3997f5	247	per_cpu(irq_stack_union.irq_stack, cpu) +
4950d6d4	248	IRQ_STACK_SIZE;
645a7919	249	#endif
6470aff6 BG	250	#ifdef CONFIG_NUMA
6470aff6 BG	251	per_cpu(x86_cpu_to_node_map, cpu) =
cf3997f5	252	early_per_cpu_map(x86_cpu_to_node_map, cpu);
9aebbdb6	253	/*
a4ce96ac	254	* Ensure that the boot cpu numa_node is correct when the boot
9aebbdb6 YL	255	* cpu is on a node that doesn't have memory installed.
	256	* Also cpu_up() will call cpu_to_node() for APs when
	257	* MEMORY_HOTPLUG is defined, before per_cpu(numa_node) is set
	258	* up later with c_init aka intel_init/amd_init.
	259	* So set them all (boot cpu and all APs).
	260	*/
	261	set_cpu_numa_node(cpu, early_cpu_to_node(cpu));
6470aff6	262	#endif
1a51e3a0	263	/*
c273fb3b	264	* Up to this point, the boot CPU has been using .init.data
2697fbd5	265	* area. Reload any changed state for the boot CPU.
1a51e3a0	266	*/
f6e9456c	267	if (!cpu)
552be871	268	switch_to_new_gdt(cpu);
4fe29a85 GOC	269	}
4fe29a85 GOC	270
0d77e7f0	271	/* indicate the early static arrays will soon be gone */
22f25138	272	#ifdef CONFIG_X86_LOCAL_APIC
0d77e7f0 BG	273	early_per_cpu_ptr(x86_cpu_to_apicid) = NULL;
0d77e7f0 BG	274	early_per_cpu_ptr(x86_bios_cpu_apicid) = NULL;
3e9e57fa	275	early_per_cpu_ptr(x86_cpu_to_acpiid) = NULL;
22f25138	276	#endif
4c321ff8 TH	277	#ifdef CONFIG_X86_32
	278	early_per_cpu_ptr(x86_cpu_to_logical_apicid) = NULL;
	279	#endif
645a7919	280	#ifdef CONFIG_NUMA
0d77e7f0 BG	281	early_per_cpu_ptr(x86_cpu_to_node_map) = NULL;
0d77e7f0 BG	282	#endif
9f0e8d04	283
9f248bde MT	284	/* Setup node to cpumask map */
9f248bde MT	285	setup_node_to_cpumask_map();
c2d1cec1 MT	286
	287	/* Setup cpu initialized, callin, callout masks */
	288	setup_cpu_local_masks();
23b2a4dd	289
23b2a4dd	290	/*
d2b6dc61 AL	291	* Sync back kernel address range again. We already did this in
	292	* setup_arch(), but percpu data also needs to be available in
	293	* the smpboot asm. We can't reliably pick up percpu mappings
	294	* using vmalloc_fault(), because exception dispatch needs
	295	* percpu data.
945fd17a TG	296	*
	297	* FIXME: Can the later sync in setup_cpu_entry_areas() replace
	298	* this call?
23b2a4dd	299	*/
945fd17a	300	sync_initial_page_table();
4fe29a85	301	}