Release 4.16 drivers/base/topology.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * driver/base/topology.c - Populate sysfs with cpu topology information
 *
 * Written by: Zhang Yanmin, Intel Corporation
 *
 * Copyright (C) 2006, Intel Corp.
 *
 * All rights reserved.
 */
#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

#ifdef CONFIG_SCHED_DRAWER
define_id_show_func(drawer_id);
static DEVICE_ATTR_RO(drawer_id);
define_siblings_show_func(drawer_siblings, drawer_cpumask);
static DEVICE_ATTR_RO(drawer_siblings);
static DEVICE_ATTR_RO(drawer_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
#ifdef CONFIG_SCHED_DRAWER
	&dev_attr_drawer_id.attr,
	&dev_attr_drawer_siblings.attr,
	&dev_attr_drawer_siblings_list.attr,
#endif
	NULL
};


static const 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
17
53.12%
1
25.00%
Heiko Carstens
10
31.25%
1
25.00%
Kay Sievers
4
12.50%
1
25.00%
Akinobu Mita
1
3.12%
1
25.00%
Total
32
100.00%
4
100.00%



static int topology_remove_dev(unsigned int cpu)
{
	struct device *dev = get_cpu_device(cpu);

	sysfs_remove_group(&dev->kobj, &topology_attr_group);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Yanmin Zhang
18
52.94%
1
25.00%
Heiko Carstens
10
29.41%
1
25.00%
Kay Sievers
4
11.76%
1
25.00%
Sebastian Andrzej Siewior
2
5.88%
1
25.00%
Total
34
100.00%
4
100.00%



static int topology_sysfs_init(void)
{
	return cpuhp_setup_state(CPUHP_TOPOLOGY_PREPARE,
				 "base/topology:prepare", topology_add_dev,
				 topology_remove_dev);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Yanmin Zhang
11
55.00%
1
33.33%
Sebastian Andrzej Siewior
7
35.00%
1
33.33%
Heiko Carstens
2
10.00%
1
33.33%
Total
20
100.00%
3
100.00%

device_initcall(topology_sysfs_init);
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Yanmin Zhang
140
37.23%
1
5.88%
Heiko Carstens
121
32.18%
3
17.65%
Sudeep Holla
34
9.04%
1
5.88%
Ben Hutchings
24
6.38%
1
5.88%
Mike Travis
22
5.85%
2
11.76%
Kay Sievers
17
4.52%
1
5.88%
Sebastian Andrzej Siewior
9
2.39%
1
5.88%
David S. Miller
3
0.80%
1
5.88%
Greg Kroah-Hartman
2
0.53%
2
11.76%
Akinobu Mita
1
0.27%
1
5.88%
Arvind Yadav
1
0.27%
1
5.88%
Bartosz Golaszewski
1
0.27%
1
5.88%
Rusty Russell
1
0.27%
1
5.88%
Total
376
100.00%
17
100.00%
Directory: drivers/base

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.