mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 15:43:59 +08:00
0d989da36b
'topology_sysfs_init()' is only called via 'device_initcall'. It can be marked as __init to save a few bytes of memory. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Link: https://lore.kernel.org/r/20200621081106.881915-1-christophe.jaillet@wanadoo.fr Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
144 lines
3.9 KiB
C
144 lines
3.9 KiB
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(die_id);
|
|
static DEVICE_ATTR_RO(die_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_cpus, sibling_cpumask);
|
|
static DEVICE_ATTR_RO(core_cpus);
|
|
static DEVICE_ATTR_RO(core_cpus_list);
|
|
|
|
define_siblings_show_func(core_siblings, core_cpumask);
|
|
static DEVICE_ATTR_RO(core_siblings);
|
|
static DEVICE_ATTR_RO(core_siblings_list);
|
|
|
|
define_siblings_show_func(die_cpus, die_cpumask);
|
|
static DEVICE_ATTR_RO(die_cpus);
|
|
static DEVICE_ATTR_RO(die_cpus_list);
|
|
|
|
define_siblings_show_func(package_cpus, core_cpumask);
|
|
static DEVICE_ATTR_RO(package_cpus);
|
|
static DEVICE_ATTR_RO(package_cpus_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_die_id.attr,
|
|
&dev_attr_core_id.attr,
|
|
&dev_attr_thread_siblings.attr,
|
|
&dev_attr_thread_siblings_list.attr,
|
|
&dev_attr_core_cpus.attr,
|
|
&dev_attr_core_cpus_list.attr,
|
|
&dev_attr_core_siblings.attr,
|
|
&dev_attr_core_siblings_list.attr,
|
|
&dev_attr_die_cpus.attr,
|
|
&dev_attr_die_cpus_list.attr,
|
|
&dev_attr_package_cpus.attr,
|
|
&dev_attr_package_cpus_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);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static int __init topology_sysfs_init(void)
|
|
{
|
|
return cpuhp_setup_state(CPUHP_TOPOLOGY_PREPARE,
|
|
"base/topology:prepare", topology_add_dev,
|
|
topology_remove_dev);
|
|
}
|
|
|
|
device_initcall(topology_sysfs_init);
|