cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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base.h (7628B)


      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
      4 * Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
      5 * Copyright (c) 2008-2012 Novell Inc.
      6 * Copyright (c) 2012-2019 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
      7 * Copyright (c) 2012-2019 Linux Foundation
      8 *
      9 * Core driver model functions and structures that should not be
     10 * shared outside of the drivers/base/ directory.
     11 *
     12 */
     13#include <linux/notifier.h>
     14
     15/**
     16 * struct subsys_private - structure to hold the private to the driver core portions of the bus_type/class structure.
     17 *
     18 * @subsys - the struct kset that defines this subsystem
     19 * @devices_kset - the subsystem's 'devices' directory
     20 * @interfaces - list of subsystem interfaces associated
     21 * @mutex - protect the devices, and interfaces lists.
     22 *
     23 * @drivers_kset - the list of drivers associated
     24 * @klist_devices - the klist to iterate over the @devices_kset
     25 * @klist_drivers - the klist to iterate over the @drivers_kset
     26 * @bus_notifier - the bus notifier list for anything that cares about things
     27 *                 on this bus.
     28 * @bus - pointer back to the struct bus_type that this structure is associated
     29 *        with.
     30 *
     31 * @glue_dirs - "glue" directory to put in-between the parent device to
     32 *              avoid namespace conflicts
     33 * @class - pointer back to the struct class that this structure is associated
     34 *          with.
     35 *
     36 * This structure is the one that is the actual kobject allowing struct
     37 * bus_type/class to be statically allocated safely.  Nothing outside of the
     38 * driver core should ever touch these fields.
     39 */
     40struct subsys_private {
     41	struct kset subsys;
     42	struct kset *devices_kset;
     43	struct list_head interfaces;
     44	struct mutex mutex;
     45
     46	struct kset *drivers_kset;
     47	struct klist klist_devices;
     48	struct klist klist_drivers;
     49	struct blocking_notifier_head bus_notifier;
     50	unsigned int drivers_autoprobe:1;
     51	struct bus_type *bus;
     52
     53	struct kset glue_dirs;
     54	struct class *class;
     55};
     56#define to_subsys_private(obj) container_of(obj, struct subsys_private, subsys.kobj)
     57
     58struct driver_private {
     59	struct kobject kobj;
     60	struct klist klist_devices;
     61	struct klist_node knode_bus;
     62	struct module_kobject *mkobj;
     63	struct device_driver *driver;
     64};
     65#define to_driver(obj) container_of(obj, struct driver_private, kobj)
     66
     67/**
     68 * struct device_private - structure to hold the private to the driver core portions of the device structure.
     69 *
     70 * @klist_children - klist containing all children of this device
     71 * @knode_parent - node in sibling list
     72 * @knode_driver - node in driver list
     73 * @knode_bus - node in bus list
     74 * @knode_class - node in class list
     75 * @deferred_probe - entry in deferred_probe_list which is used to retry the
     76 *	binding of drivers which were unable to get all the resources needed by
     77 *	the device; typically because it depends on another driver getting
     78 *	probed first.
     79 * @async_driver - pointer to device driver awaiting probe via async_probe
     80 * @device - pointer back to the struct device that this structure is
     81 * associated with.
     82 * @dead - This device is currently either in the process of or has been
     83 *	removed from the system. Any asynchronous events scheduled for this
     84 *	device should exit without taking any action.
     85 *
     86 * Nothing outside of the driver core should ever touch these fields.
     87 */
     88struct device_private {
     89	struct klist klist_children;
     90	struct klist_node knode_parent;
     91	struct klist_node knode_driver;
     92	struct klist_node knode_bus;
     93	struct klist_node knode_class;
     94	struct list_head deferred_probe;
     95	struct device_driver *async_driver;
     96	char *deferred_probe_reason;
     97	struct device *device;
     98	u8 dead:1;
     99};
    100#define to_device_private_parent(obj)	\
    101	container_of(obj, struct device_private, knode_parent)
    102#define to_device_private_driver(obj)	\
    103	container_of(obj, struct device_private, knode_driver)
    104#define to_device_private_bus(obj)	\
    105	container_of(obj, struct device_private, knode_bus)
    106#define to_device_private_class(obj)	\
    107	container_of(obj, struct device_private, knode_class)
    108
    109/* initialisation functions */
    110extern int devices_init(void);
    111extern int buses_init(void);
    112extern int classes_init(void);
    113extern int firmware_init(void);
    114#ifdef CONFIG_SYS_HYPERVISOR
    115extern int hypervisor_init(void);
    116#else
    117static inline int hypervisor_init(void) { return 0; }
    118#endif
    119extern int platform_bus_init(void);
    120extern void cpu_dev_init(void);
    121extern void container_dev_init(void);
    122#ifdef CONFIG_AUXILIARY_BUS
    123extern void auxiliary_bus_init(void);
    124#else
    125static inline void auxiliary_bus_init(void) { }
    126#endif
    127
    128struct kobject *virtual_device_parent(struct device *dev);
    129
    130extern int bus_add_device(struct device *dev);
    131extern void bus_probe_device(struct device *dev);
    132extern void bus_remove_device(struct device *dev);
    133
    134extern int bus_add_driver(struct device_driver *drv);
    135extern void bus_remove_driver(struct device_driver *drv);
    136extern void device_release_driver_internal(struct device *dev,
    137					   struct device_driver *drv,
    138					   struct device *parent);
    139
    140extern void driver_detach(struct device_driver *drv);
    141extern void driver_deferred_probe_del(struct device *dev);
    142extern void device_set_deferred_probe_reason(const struct device *dev,
    143					     struct va_format *vaf);
    144static inline int driver_match_device(struct device_driver *drv,
    145				      struct device *dev)
    146{
    147	return drv->bus->match ? drv->bus->match(dev, drv) : 1;
    148}
    149extern bool driver_allows_async_probing(struct device_driver *drv);
    150
    151extern int driver_add_groups(struct device_driver *drv,
    152			     const struct attribute_group **groups);
    153extern void driver_remove_groups(struct device_driver *drv,
    154				 const struct attribute_group **groups);
    155void device_driver_detach(struct device *dev);
    156
    157extern char *make_class_name(const char *name, struct kobject *kobj);
    158
    159extern int devres_release_all(struct device *dev);
    160extern void device_block_probing(void);
    161extern void device_unblock_probing(void);
    162extern void deferred_probe_extend_timeout(void);
    163
    164/* /sys/devices directory */
    165extern struct kset *devices_kset;
    166extern void devices_kset_move_last(struct device *dev);
    167
    168#if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS)
    169extern void module_add_driver(struct module *mod, struct device_driver *drv);
    170extern void module_remove_driver(struct device_driver *drv);
    171#else
    172static inline void module_add_driver(struct module *mod,
    173				     struct device_driver *drv) { }
    174static inline void module_remove_driver(struct device_driver *drv) { }
    175#endif
    176
    177#ifdef CONFIG_DEVTMPFS
    178extern int devtmpfs_init(void);
    179#else
    180static inline int devtmpfs_init(void) { return 0; }
    181#endif
    182
    183/* Device links support */
    184extern int device_links_read_lock(void);
    185extern void device_links_read_unlock(int idx);
    186extern int device_links_read_lock_held(void);
    187extern int device_links_check_suppliers(struct device *dev);
    188extern void device_links_force_bind(struct device *dev);
    189extern void device_links_driver_bound(struct device *dev);
    190extern void device_links_driver_cleanup(struct device *dev);
    191extern void device_links_no_driver(struct device *dev);
    192extern bool device_links_busy(struct device *dev);
    193extern void device_links_unbind_consumers(struct device *dev);
    194extern void fw_devlink_drivers_done(void);
    195
    196/* device pm support */
    197void device_pm_move_to_tail(struct device *dev);
    198
    199#ifdef CONFIG_DEVTMPFS
    200int devtmpfs_create_node(struct device *dev);
    201int devtmpfs_delete_node(struct device *dev);
    202#else
    203static inline int devtmpfs_create_node(struct device *dev) { return 0; }
    204static inline int devtmpfs_delete_node(struct device *dev) { return 0; }
    205#endif
    206
    207void software_node_notify(struct device *dev);
    208void software_node_notify_remove(struct device *dev);