forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
143 lines
3.9 KiB
143 lines
3.9 KiB
// 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 sysfs_emit(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);
|
|
|