400 lines
9.5 KiB
C
400 lines
9.5 KiB
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 <asm/smp.h>
|
|
#include <asm/percpu.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/topology.h>
|
|
#include <asm/mpspec.h>
|
|
#include <asm/apicdef.h>
|
|
#include <asm/highmem.h>
|
|
|
|
#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;
|
|
unsigned int max_physical_apicid;
|
|
EXPORT_SYMBOL(boot_cpu_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
|
|
|
|
/* 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
|
|
|
|
#if defined(CONFIG_HAVE_SETUP_PER_CPU_AREA) && defined(CONFIG_X86_SMP)
|
|
/*
|
|
* 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_HAVE_CPUMASK_OF_CPU_MAP
|
|
cpumask_t *cpumask_of_cpu_map __read_mostly;
|
|
EXPORT_SYMBOL(cpumask_of_cpu_map);
|
|
|
|
/* requires nr_cpu_ids to be initialized */
|
|
static void __init setup_cpumask_of_cpu(void)
|
|
{
|
|
int i;
|
|
|
|
/* alloc_bootmem zeroes memory */
|
|
cpumask_of_cpu_map = alloc_bootmem_low(sizeof(cpumask_t) * nr_cpu_ids);
|
|
for (i = 0; i < nr_cpu_ids; i++)
|
|
cpu_set(i, cpumask_of_cpu_map[i]);
|
|
}
|
|
#else
|
|
static inline void setup_cpumask_of_cpu(void) { }
|
|
#endif
|
|
|
|
#ifdef CONFIG_X86_32
|
|
/*
|
|
* Great future not-so-futuristic plan: make i386 and x86_64 do it
|
|
* the same way
|
|
*/
|
|
unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
|
|
EXPORT_SYMBOL(__per_cpu_offset);
|
|
static inline void setup_cpu_pda_map(void) { }
|
|
|
|
#elif !defined(CONFIG_SMP)
|
|
static inline void setup_cpu_pda_map(void) { }
|
|
|
|
#else /* CONFIG_SMP && CONFIG_X86_64 */
|
|
|
|
/*
|
|
* Allocate cpu_pda pointer table and array via alloc_bootmem.
|
|
*/
|
|
static void __init setup_cpu_pda_map(void)
|
|
{
|
|
char *pda;
|
|
struct x8664_pda **new_cpu_pda;
|
|
unsigned long size;
|
|
int cpu;
|
|
|
|
size = roundup(sizeof(struct x8664_pda), cache_line_size());
|
|
|
|
/* allocate cpu_pda array and pointer table */
|
|
{
|
|
unsigned long tsize = nr_cpu_ids * sizeof(void *);
|
|
unsigned long asize = size * (nr_cpu_ids - 1);
|
|
|
|
tsize = roundup(tsize, cache_line_size());
|
|
new_cpu_pda = alloc_bootmem(tsize + asize);
|
|
pda = (char *)new_cpu_pda + tsize;
|
|
}
|
|
|
|
/* initialize pointer table to static pda's */
|
|
for_each_possible_cpu(cpu) {
|
|
if (cpu == 0) {
|
|
/* leave boot cpu pda in place */
|
|
new_cpu_pda[0] = cpu_pda(0);
|
|
continue;
|
|
}
|
|
new_cpu_pda[cpu] = (struct x8664_pda *)pda;
|
|
new_cpu_pda[cpu]->in_bootmem = 1;
|
|
pda += size;
|
|
}
|
|
|
|
/* point to new pointer table */
|
|
_cpu_pda = new_cpu_pda;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* 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 = PERCPU_ENOUGH_ROOM;
|
|
char *ptr;
|
|
int cpu;
|
|
|
|
/* Setup cpu_pda map */
|
|
setup_cpu_pda_map();
|
|
|
|
/* Copy section for each CPU (we discard the original) */
|
|
size = PERCPU_ENOUGH_ROOM;
|
|
printk(KERN_INFO "PERCPU: Allocating %zd bytes of per cpu data\n",
|
|
size);
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
#ifndef CONFIG_NEED_MULTIPLE_NODES
|
|
ptr = alloc_bootmem_pages(size);
|
|
#else
|
|
int node = early_cpu_to_node(cpu);
|
|
if (!node_online(node) || !NODE_DATA(node)) {
|
|
ptr = alloc_bootmem_pages(size);
|
|
printk(KERN_INFO
|
|
"cpu %d has no node %d or node-local memory\n",
|
|
cpu, node);
|
|
}
|
|
else
|
|
ptr = alloc_bootmem_pages_node(NODE_DATA(node), size);
|
|
#endif
|
|
per_cpu_offset(cpu) = ptr - __per_cpu_start;
|
|
memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
|
|
|
|
}
|
|
|
|
printk(KERN_DEBUG "NR_CPUS: %d, nr_cpu_ids: %d, nr_node_ids %d\n",
|
|
NR_CPUS, nr_cpu_ids, nr_node_ids);
|
|
|
|
/* Setup percpu data maps */
|
|
setup_per_cpu_maps();
|
|
|
|
/* Setup node to cpumask map */
|
|
setup_node_to_cpumask_map();
|
|
|
|
/* Setup cpumask_of_cpu map */
|
|
setup_cpumask_of_cpu();
|
|
}
|
|
|
|
#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.
|
|
*/
|
|
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));
|
|
|
|
pr_debug(KERN_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);
|
|
|
|
if (cpu_pda(cpu) && node != NUMA_NO_NODE)
|
|
cpu_pda(cpu)->nodenumber = node;
|
|
|
|
if (cpu_to_node_map)
|
|
cpu_to_node_map[cpu] = node;
|
|
|
|
else if (per_cpu_offset(cpu))
|
|
per_cpu(x86_cpu_to_node_map, cpu) = node;
|
|
|
|
else
|
|
pr_debug("Setting node for non-present cpu %d\n", cpu);
|
|
}
|
|
|
|
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[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 = 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 *_node_to_cpumask_ptr(int node)
|
|
{
|
|
if (node_to_cpumask_map == NULL) {
|
|
printk(KERN_WARNING
|
|
"_node_to_cpumask_ptr(%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
|
|
"_node_to_cpumask_ptr(%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_ptr);
|
|
|
|
/*
|
|
* 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 */
|
|
|