mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 19:45:22 +07:00
f4660cc994
Vhost-vsock is a software device so there is no probe call that causes the driver to register its misc char device node. This creates a chicken and egg problem: userspace applications must open /dev/vhost-vsock to use the driver but the file doesn't exist until the kernel module has been loaded. Use the devname modalias mechanism so that /dev/vhost-vsock is created at boot. The vhost_vsock kernel module is automatically loaded when the first application opens /dev/host-vsock. Note that the "reserved for local use" range in Documentation/admin-guide/devices.txt is incorrect. The userio driver already occupies part of that range. I've updated the documentation accordingly. Cc: device@lanana.org Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
#ifndef _LINUX_MISCDEVICE_H
|
|
#define _LINUX_MISCDEVICE_H
|
|
#include <linux/major.h>
|
|
#include <linux/list.h>
|
|
#include <linux/types.h>
|
|
#include <linux/device.h>
|
|
|
|
/*
|
|
* These allocations are managed by device@lanana.org. If you use an
|
|
* entry that is not in assigned your entry may well be moved and
|
|
* reassigned, or set dynamic if a fixed value is not justified.
|
|
*/
|
|
|
|
#define PSMOUSE_MINOR 1
|
|
#define MS_BUSMOUSE_MINOR 2 /* unused */
|
|
#define ATIXL_BUSMOUSE_MINOR 3 /* unused */
|
|
/*#define AMIGAMOUSE_MINOR 4 FIXME OBSOLETE */
|
|
#define ATARIMOUSE_MINOR 5 /* unused */
|
|
#define SUN_MOUSE_MINOR 6 /* unused */
|
|
#define APOLLO_MOUSE_MINOR 7 /* unused */
|
|
#define PC110PAD_MINOR 9 /* unused */
|
|
/*#define ADB_MOUSE_MINOR 10 FIXME OBSOLETE */
|
|
#define WATCHDOG_MINOR 130 /* Watchdog timer */
|
|
#define TEMP_MINOR 131 /* Temperature Sensor */
|
|
#define APM_MINOR_DEV 134
|
|
#define RTC_MINOR 135
|
|
#define EFI_RTC_MINOR 136 /* EFI Time services */
|
|
#define VHCI_MINOR 137
|
|
#define SUN_OPENPROM_MINOR 139
|
|
#define DMAPI_MINOR 140 /* unused */
|
|
#define NVRAM_MINOR 144
|
|
#define SGI_MMTIMER 153
|
|
#define STORE_QUEUE_MINOR 155 /* unused */
|
|
#define I2O_MINOR 166
|
|
#define HWRNG_MINOR 183
|
|
#define MICROCODE_MINOR 184
|
|
#define IRNET_MINOR 187
|
|
#define VFIO_MINOR 196
|
|
#define TUN_MINOR 200
|
|
#define CUSE_MINOR 203
|
|
#define MWAVE_MINOR 219 /* ACP/Mwave Modem */
|
|
#define MPT_MINOR 220
|
|
#define MPT2SAS_MINOR 221
|
|
#define MPT3SAS_MINOR 222
|
|
#define UINPUT_MINOR 223
|
|
#define MISC_MCELOG_MINOR 227
|
|
#define HPET_MINOR 228
|
|
#define FUSE_MINOR 229
|
|
#define KVM_MINOR 232
|
|
#define BTRFS_MINOR 234
|
|
#define AUTOFS_MINOR 235
|
|
#define MAPPER_CTRL_MINOR 236
|
|
#define LOOP_CTRL_MINOR 237
|
|
#define VHOST_NET_MINOR 238
|
|
#define UHID_MINOR 239
|
|
#define USERIO_MINOR 240
|
|
#define VHOST_VSOCK_MINOR 241
|
|
#define MISC_DYNAMIC_MINOR 255
|
|
|
|
struct device;
|
|
struct attribute_group;
|
|
|
|
struct miscdevice {
|
|
int minor;
|
|
const char *name;
|
|
const struct file_operations *fops;
|
|
struct list_head list;
|
|
struct device *parent;
|
|
struct device *this_device;
|
|
const struct attribute_group **groups;
|
|
const char *nodename;
|
|
umode_t mode;
|
|
};
|
|
|
|
extern int misc_register(struct miscdevice *misc);
|
|
extern void misc_deregister(struct miscdevice *misc);
|
|
|
|
/*
|
|
* Helper macro for drivers that don't do anything special in the initcall.
|
|
* This helps in eleminating of boilerplate code.
|
|
*/
|
|
#define builtin_misc_device(__misc_device) \
|
|
builtin_driver(__misc_device, misc_register)
|
|
|
|
/*
|
|
* Helper macro for drivers that don't do anything special in module init / exit
|
|
* call. This helps in eleminating of boilerplate code.
|
|
*/
|
|
#define module_misc_device(__misc_device) \
|
|
module_driver(__misc_device, misc_register, misc_deregister)
|
|
|
|
#define MODULE_ALIAS_MISCDEV(minor) \
|
|
MODULE_ALIAS("char-major-" __stringify(MISC_MAJOR) \
|
|
"-" __stringify(minor))
|
|
#endif
|