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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* This file contains NUMA specific variables and functions which can
* be split away from DISCONTIGMEM and are used on NUMA machines with
* contiguous memory.
* 2002/08/07 Erich Focht <efocht@ess.nec.de>
* Populate cpu entries in sysfs for non-numa systems as well
* Intel Corporation - Ashok Raj
* 02/27/2006 Zhang, Yanmin
* Populate cpu cache entries in sysfs for cpu cache info
*/
#include <linux/cpu.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/node.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/nodemask.h>
#include <linux/notifier.h>
#include <asm/mmzone.h>
#include <asm/numa.h>
#include <asm/cpu.h>
static struct ia64_cpu *sysfs_cpus;
void arch_fix_phys_package_id(int num, u32 slot)
{
#ifdef CONFIG_SMP
if (cpu_data(num)->socket_id == -1)
cpu_data(num)->socket_id = slot;
#endif
}
EXPORT_SYMBOL_GPL(arch_fix_phys_package_id);
#ifdef CONFIG_HOTPLUG_CPU
int __ref arch_register_cpu(int num)
{
#ifdef CONFIG_ACPI
/*
* If CPEI can be re-targetted or if this is not
* CPEI target, then it is hotpluggable
*/
if (can_cpei_retarget() || !is_cpu_cpei_target(num))
sysfs_cpus[num].cpu.hotpluggable = 1;
map_cpu_to_node(num, node_cpuid[num].nid);
#endif
return register_cpu(&sysfs_cpus[num].cpu, num);
}
EXPORT_SYMBOL(arch_register_cpu);
void __ref arch_unregister_cpu(int num)
{
unregister_cpu(&sysfs_cpus[num].cpu);
#ifdef CONFIG_ACPI
unmap_cpu_from_node(num, cpu_to_node(num));
#endif
}
EXPORT_SYMBOL(arch_unregister_cpu);
#else
static int __init arch_register_cpu(int num)
{
return register_cpu(&sysfs_cpus[num].cpu, num);
}
#endif /*CONFIG_HOTPLUG_CPU*/
static int __init topology_init(void)
{
int i, err = 0;
#ifdef CONFIG_NUMA
/*
* MCD - Do we want to register all ONLINE nodes, or all POSSIBLE nodes?
*/
for_each_online_node(i) {
if ((err = register_one_node(i)))
goto out;
}
#endif
sysfs_cpus = kzalloc(sizeof(struct ia64_cpu) * NR_CPUS, GFP_KERNEL);
if (!sysfs_cpus)
panic("kzalloc in topology_init failed - NR_CPUS too big?");
for_each_present_cpu(i) {
if((err = arch_register_cpu(i)))
goto out;
}
out:
return err;
}
subsys_initcall(topology_init);
/*
* Export cpu cache information through sysfs
*/
/*
* A bunch of string array to get pretty printing
*/
static const char *cache_types[] = {
"", /* not used */
"Instruction",
"Data",
"Unified" /* unified */
};
static const char *cache_mattrib[]={
"WriteThrough",
"WriteBack",
"", /* reserved */
"" /* reserved */
};
struct cache_info {
pal_cache_config_info_t cci;
cpumask_t shared_cpu_map;
int level;
int type;
struct kobject kobj;
};
struct cpu_cache_info {
struct cache_info *cache_leaves;
int num_cache_leaves;
struct kobject kobj;
};
static struct cpu_cache_info all_cpu_cache_info[NR_CPUS] __cpuinitdata;
#define LEAF_KOBJECT_PTR(x,y) (&all_cpu_cache_info[x].cache_leaves[y])
#ifdef CONFIG_SMP
static void __cpuinit cache_shared_cpu_map_setup( unsigned int cpu,
struct cache_info * this_leaf)
{
pal_cache_shared_info_t csi;
int num_shared, i = 0;
unsigned int j;
if (cpu_data(cpu)->threads_per_core <= 1 &&
cpu_data(cpu)->cores_per_socket <= 1) {
cpu_set(cpu, this_leaf->shared_cpu_map);
return;
}
if (ia64_pal_cache_shared_info(this_leaf->level,
this_leaf->type,
0,
&csi) != PAL_STATUS_SUCCESS)
return;
num_shared = (int) csi.num_shared;
do {
for_each_possible_cpu(j)
if (cpu_data(cpu)->socket_id == cpu_data(j)->socket_id
&& cpu_data(j)->core_id == csi.log1_cid
&& cpu_data(j)->thread_id == csi.log1_tid)
cpu_set(j, this_leaf->shared_cpu_map);
i++;
} while (i < num_shared &&
ia64_pal_cache_shared_info(this_leaf->level,
this_leaf->type,
i,
&csi) == PAL_STATUS_SUCCESS);
}
#else
static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu,
struct cache_info * this_leaf)
{
cpu_set(cpu, this_leaf->shared_cpu_map);
return;
}
#endif
static ssize_t show_coherency_line_size(struct cache_info *this_leaf,
char *buf)
{
return sprintf(buf, "%u\n", 1 << this_leaf->cci.pcci_line_size);
}
static ssize_t show_ways_of_associativity(struct cache_info *this_leaf,
char *buf)
{
return sprintf(buf, "%u\n", this_leaf->cci.pcci_assoc);
}
static ssize_t show_attributes(struct cache_info *this_leaf, char *buf)
{
return sprintf(buf,
"%s\n",
cache_mattrib[this_leaf->cci.pcci_cache_attr]);
}
static ssize_t show_size(struct cache_info *this_leaf, char *buf)
{
return sprintf(buf, "%uK\n", this_leaf->cci.pcci_cache_size / 1024);
}
static ssize_t show_number_of_sets(struct cache_info *this_leaf, char *buf)
{
unsigned number_of_sets = this_leaf->cci.pcci_cache_size;
number_of_sets /= this_leaf->cci.pcci_assoc;
number_of_sets /= 1 << this_leaf->cci.pcci_line_size;
return sprintf(buf, "%u\n", number_of_sets);
}
static ssize_t show_shared_cpu_map(struct cache_info *this_leaf, char *buf)
{
ssize_t len;
cpumask_t shared_cpu_map;
cpus_and(shared_cpu_map, this_leaf->shared_cpu_map, cpu_online_map);
len = cpumask_scnprintf(buf, NR_CPUS+1, &shared_cpu_map);
len += sprintf(buf+len, "\n");
return len;
}
static ssize_t show_type(struct cache_info *this_leaf, char *buf)
{
int type = this_leaf->type + this_leaf->cci.pcci_unified;
return sprintf(buf, "%s\n", cache_types[type]);
}
static ssize_t show_level(struct cache_info *this_leaf, char *buf)
{
return sprintf(buf, "%u\n", this_leaf->level);
}
struct cache_attr {
struct attribute attr;
ssize_t (*show)(struct cache_info *, char *);
ssize_t (*store)(struct cache_info *, const char *, size_t count);
};
#ifdef define_one_ro
#undef define_one_ro
#endif
#define define_one_ro(_name) \
static struct cache_attr _name = \
__ATTR(_name, 0444, show_##_name, NULL)
define_one_ro(level);
define_one_ro(type);
define_one_ro(coherency_line_size);
define_one_ro(ways_of_associativity);
define_one_ro(size);
define_one_ro(number_of_sets);
define_one_ro(shared_cpu_map);
define_one_ro(attributes);
static struct attribute * cache_default_attrs[] = {
&type.attr,
&level.attr,
&coherency_line_size.attr,
&ways_of_associativity.attr,
&attributes.attr,
&size.attr,
&number_of_sets.attr,
&shared_cpu_map.attr,
NULL
};
#define to_object(k) container_of(k, struct cache_info, kobj)
#define to_attr(a) container_of(a, struct cache_attr, attr)
static ssize_t cache_show(struct kobject * kobj, struct attribute * attr, char * buf)
{
struct cache_attr *fattr = to_attr(attr);
struct cache_info *this_leaf = to_object(kobj);
ssize_t ret;
ret =
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