Release 4.7 drivers/base/topology.c
/*
* driver/base/topology.c - Populate sysfs with cpu topology information
*
* Written by: Zhang Yanmin, Intel Corporation
*
* Copyright (C) 2006, Intel Corp.
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <linux/mm.h>
#include <linux/cpu.h>
#include <linux/module.h>
#include <linux/hardirq.h>
#include <linux/topology.h>
#define define_id_show_func(name) \
static ssize_t name##_show(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
return sprintf(buf, "%d\n", topology_##name(dev->id)); \
}
#define define_siblings_show_map(name, mask) \
static ssize_t name##_show(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
return cpumap_print_to_pagebuf(false, buf, topology_##mask(dev->id));\
}
#define define_siblings_show_list(name, mask) \
static ssize_t name##_list_show(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
return cpumap_print_to_pagebuf(true, buf, topology_##mask(dev->id));\
}
#define define_siblings_show_func(name, mask) \
define_siblings_show_map(name, mask); \
define_siblings_show_list(name, mask)
define_id_show_func(physical_package_id);
static DEVICE_ATTR_RO(physical_package_id);
define_id_show_func(core_id);
static DEVICE_ATTR_RO(core_id);
define_siblings_show_func(thread_siblings, sibling_cpumask);
static DEVICE_ATTR_RO(thread_siblings);
static DEVICE_ATTR_RO(thread_siblings_list);
define_siblings_show_func(core_siblings, core_cpumask);
static DEVICE_ATTR_RO(core_siblings);
static DEVICE_ATTR_RO(core_siblings_list);
#ifdef CONFIG_SCHED_BOOK
define_id_show_func(book_id);
static DEVICE_ATTR_RO(book_id);
define_siblings_show_func(book_siblings, book_cpumask);
static DEVICE_ATTR_RO(book_siblings);
static DEVICE_ATTR_RO(book_siblings_list);
#endif
static struct attribute *default_attrs[] = {
&dev_attr_physical_package_id.attr,
&dev_attr_core_id.attr,
&dev_attr_thread_siblings.attr,
&dev_attr_thread_siblings_list.attr,
&dev_attr_core_siblings.attr,
&dev_attr_core_siblings_list.attr,
#ifdef CONFIG_SCHED_BOOK
&dev_attr_book_id.attr,
&dev_attr_book_siblings.attr,
&dev_attr_book_siblings_list.attr,
#endif
NULL
};
static struct attribute_group topology_attr_group = {
.attrs = default_attrs,
.name = "topology"
};
/* Add/Remove cpu_topology interface for CPU device */
static int topology_add_dev(unsigned int cpu)
{
struct device *dev = get_cpu_device(cpu);
return sysfs_create_group(&dev->kobj, &topology_attr_group);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yanmin zhang | yanmin zhang | 17 | 53.12% | 1 | 25.00% |
| heiko carstens | heiko carstens | 10 | 31.25% | 1 | 25.00% |
| kay sievers | kay sievers | 4 | 12.50% | 1 | 25.00% |
| akinobu mita | akinobu mita | 1 | 3.12% | 1 | 25.00% |
| Total | 32 | 100.00% | 4 | 100.00% |
static void topology_remove_dev(unsigned int cpu)
{
struct device *dev = get_cpu_device(cpu);
sysfs_remove_group(&dev->kobj, &topology_attr_group);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yanmin zhang | yanmin zhang | 16 | 51.61% | 1 | 33.33% |
| heiko carstens | heiko carstens | 11 | 35.48% | 1 | 33.33% |
| kay sievers | kay sievers | 4 | 12.90% | 1 | 33.33% |
| Total | 31 | 100.00% | 3 | 100.00% |
static int topology_cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
int rc = 0;
switch (action) {
case CPU_UP_PREPARE:
case CPU_UP_PREPARE_FROZEN:
rc = topology_add_dev(cpu);
break;
case CPU_UP_CANCELED:
case CPU_UP_CANCELED_FROZEN:
case CPU_DEAD:
case CPU_DEAD_FROZEN:
topology_remove_dev(cpu);
break;
}
return notifier_from_errno(rc);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yanmin zhang | yanmin zhang | 53 | 67.95% | 1 | 25.00% |
| heiko carstens | heiko carstens | 13 | 16.67% | 1 | 25.00% |
| rafael j. wysocki | rafael j. wysocki | 9 | 11.54% | 1 | 25.00% |
| akinobu mita | akinobu mita | 3 | 3.85% | 1 | 25.00% |
| Total | 78 | 100.00% | 4 | 100.00% |
static int topology_sysfs_init(void)
{
int cpu;
int rc = 0;
cpu_notifier_register_begin();
for_each_online_cpu(cpu) {
rc = topology_add_dev(cpu);
if (rc)
goto out;
}
__hotcpu_notifier(topology_cpu_callback, 0);
out:
cpu_notifier_register_done();
return rc;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yanmin zhang | yanmin zhang | 23 | 42.59% | 1 | 33.33% |
| heiko carstens | heiko carstens | 16 | 29.63% | 1 | 33.33% |
| srivatsa s. bhat | srivatsa s. bhat | 15 | 27.78% | 1 | 33.33% |
| Total | 54 | 100.00% | 3 | 100.00% |
device_initcall(topology_sysfs_init);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yanmin zhang | yanmin zhang | 204 | 47.66% | 1 | 7.14% |
| heiko carstens | heiko carstens | 94 | 21.96% | 2 | 14.29% |
| sudeep holla | sudeep holla | 34 | 7.94% | 1 | 7.14% |
| ben hutchings | ben hutchings | 24 | 5.61% | 1 | 7.14% |
| mike travis | mike travis | 22 | 5.14% | 1 | 7.14% |
| kay sievers | kay sievers | 17 | 3.97% | 1 | 7.14% |
| srivatsa s. bhat | srivatsa s. bhat | 15 | 3.50% | 1 | 7.14% |
| rafael j. wysocki | rafael j. wysocki | 9 | 2.10% | 1 | 7.14% |
| akinobu mita | akinobu mita | 4 | 0.93% | 2 | 14.29% |
| david s. miller | david s. miller | 3 | 0.70% | 1 | 7.14% |
| bartosz golaszewski | bartosz golaszewski | 1 | 0.23% | 1 | 7.14% |
| rusty russell | rusty russell | 1 | 0.23% | 1 | 7.14% |
| Total | 428 | 100.00% | 14 | 100.00% |
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