mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
f1045056c7
Provide default defines for the topology_book_[id|cpumask] and topology_drawer_[id|cpumask] macros just like for each other topology level. This way all topology levels are handled in a similar way. Still the the book and drawer levels are only used on s390, and also the sysfs attributes are only created on s390. However other architectures may opt in if wanted. Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Link: https://lore.kernel.org/r/20211129130309.3256168-4-hca@linux.ibm.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
180 lines
4.7 KiB
C
180 lines
4.7 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 sysfs_emit(buf, "%d\n", topology_##name(dev->id)); \
|
|
}
|
|
|
|
#define define_siblings_read_func(name, mask) \
|
|
static ssize_t name##_read(struct file *file, struct kobject *kobj, \
|
|
struct bin_attribute *attr, char *buf, \
|
|
loff_t off, size_t count) \
|
|
{ \
|
|
struct device *dev = kobj_to_dev(kobj); \
|
|
\
|
|
return cpumap_print_bitmask_to_buf(buf, topology_##mask(dev->id), \
|
|
off, count); \
|
|
} \
|
|
\
|
|
static ssize_t name##_list_read(struct file *file, struct kobject *kobj, \
|
|
struct bin_attribute *attr, char *buf, \
|
|
loff_t off, size_t count) \
|
|
{ \
|
|
struct device *dev = kobj_to_dev(kobj); \
|
|
\
|
|
return cpumap_print_list_to_buf(buf, topology_##mask(dev->id), \
|
|
off, count); \
|
|
}
|
|
|
|
define_id_show_func(physical_package_id);
|
|
static DEVICE_ATTR_RO(physical_package_id);
|
|
|
|
#ifdef TOPOLOGY_DIE_SYSFS
|
|
define_id_show_func(die_id);
|
|
static DEVICE_ATTR_RO(die_id);
|
|
#endif
|
|
|
|
#ifdef TOPOLOGY_CLUSTER_SYSFS
|
|
define_id_show_func(cluster_id);
|
|
static DEVICE_ATTR_RO(cluster_id);
|
|
#endif
|
|
|
|
define_id_show_func(core_id);
|
|
static DEVICE_ATTR_RO(core_id);
|
|
|
|
define_siblings_read_func(thread_siblings, sibling_cpumask);
|
|
static BIN_ATTR_RO(thread_siblings, 0);
|
|
static BIN_ATTR_RO(thread_siblings_list, 0);
|
|
|
|
define_siblings_read_func(core_cpus, sibling_cpumask);
|
|
static BIN_ATTR_RO(core_cpus, 0);
|
|
static BIN_ATTR_RO(core_cpus_list, 0);
|
|
|
|
define_siblings_read_func(core_siblings, core_cpumask);
|
|
static BIN_ATTR_RO(core_siblings, 0);
|
|
static BIN_ATTR_RO(core_siblings_list, 0);
|
|
|
|
#ifdef TOPOLOGY_CLUSTER_SYSFS
|
|
define_siblings_read_func(cluster_cpus, cluster_cpumask);
|
|
static BIN_ATTR_RO(cluster_cpus, 0);
|
|
static BIN_ATTR_RO(cluster_cpus_list, 0);
|
|
#endif
|
|
|
|
#ifdef TOPOLOGY_DIE_SYSFS
|
|
define_siblings_read_func(die_cpus, die_cpumask);
|
|
static BIN_ATTR_RO(die_cpus, 0);
|
|
static BIN_ATTR_RO(die_cpus_list, 0);
|
|
#endif
|
|
|
|
define_siblings_read_func(package_cpus, core_cpumask);
|
|
static BIN_ATTR_RO(package_cpus, 0);
|
|
static BIN_ATTR_RO(package_cpus_list, 0);
|
|
|
|
#ifdef TOPOLOGY_BOOK_SYSFS
|
|
define_id_show_func(book_id);
|
|
static DEVICE_ATTR_RO(book_id);
|
|
define_siblings_read_func(book_siblings, book_cpumask);
|
|
static BIN_ATTR_RO(book_siblings, 0);
|
|
static BIN_ATTR_RO(book_siblings_list, 0);
|
|
#endif
|
|
|
|
#ifdef TOPOLOGY_DRAWER_SYSFS
|
|
define_id_show_func(drawer_id);
|
|
static DEVICE_ATTR_RO(drawer_id);
|
|
define_siblings_read_func(drawer_siblings, drawer_cpumask);
|
|
static BIN_ATTR_RO(drawer_siblings, 0);
|
|
static BIN_ATTR_RO(drawer_siblings_list, 0);
|
|
#endif
|
|
|
|
static struct bin_attribute *bin_attrs[] = {
|
|
&bin_attr_core_cpus,
|
|
&bin_attr_core_cpus_list,
|
|
&bin_attr_thread_siblings,
|
|
&bin_attr_thread_siblings_list,
|
|
&bin_attr_core_siblings,
|
|
&bin_attr_core_siblings_list,
|
|
#ifdef TOPOLOGY_CLUSTER_SYSFS
|
|
&bin_attr_cluster_cpus,
|
|
&bin_attr_cluster_cpus_list,
|
|
#endif
|
|
#ifdef TOPOLOGY_DIE_SYSFS
|
|
&bin_attr_die_cpus,
|
|
&bin_attr_die_cpus_list,
|
|
#endif
|
|
&bin_attr_package_cpus,
|
|
&bin_attr_package_cpus_list,
|
|
#ifdef TOPOLOGY_BOOK_SYSFS
|
|
&bin_attr_book_siblings,
|
|
&bin_attr_book_siblings_list,
|
|
#endif
|
|
#ifdef TOPOLOGY_DRAWER_SYSFS
|
|
&bin_attr_drawer_siblings,
|
|
&bin_attr_drawer_siblings_list,
|
|
#endif
|
|
NULL
|
|
};
|
|
|
|
static struct attribute *default_attrs[] = {
|
|
&dev_attr_physical_package_id.attr,
|
|
#ifdef TOPOLOGY_DIE_SYSFS
|
|
&dev_attr_die_id.attr,
|
|
#endif
|
|
#ifdef TOPOLOGY_CLUSTER_SYSFS
|
|
&dev_attr_cluster_id.attr,
|
|
#endif
|
|
&dev_attr_core_id.attr,
|
|
#ifdef TOPOLOGY_BOOK_SYSFS
|
|
&dev_attr_book_id.attr,
|
|
#endif
|
|
#ifdef TOPOLOGY_DRAWER_SYSFS
|
|
&dev_attr_drawer_id.attr,
|
|
#endif
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group topology_attr_group = {
|
|
.attrs = default_attrs,
|
|
.bin_attrs = bin_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);
|