// 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
  ", 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);