Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * kernel/configs.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * Echo the kernel .config file used to build the kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * Copyright (C) 2002 Khalid Aziz <khalid_aziz@hp.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Copyright (C) 2002 Randy Dunlap <rdunlap@xenotime.net>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * Copyright (C) 2002 Al Stone <ahs3@fc.hp.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * Copyright (C) 2002 Hewlett-Packard Company
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/proc_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)  * "IKCFG_ST" and "IKCFG_ED" are used to extract the config data from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)  * a binary kernel image or a module. See scripts/extract-ikconfig.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) asm (
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) "	.pushsection .rodata, \"a\"		\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) "	.ascii \"IKCFG_ST\"			\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) "	.global kernel_config_data		\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) "kernel_config_data:				\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) "	.incbin \"kernel/config_data.gz\"	\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) "	.global kernel_config_data_end		\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) "kernel_config_data_end:			\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) "	.ascii \"IKCFG_ED\"			\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) "	.popsection				\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #ifdef CONFIG_IKCONFIG_PROC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) extern char kernel_config_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) extern char kernel_config_data_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) ikconfig_read_current(struct file *file, char __user *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		      size_t len, loff_t * offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	return simple_read_from_buffer(buf, len, offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 				       &kernel_config_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 				       &kernel_config_data_end -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 				       &kernel_config_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static const struct proc_ops config_gz_proc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	.proc_read	= ikconfig_read_current,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	.proc_lseek	= default_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static int __init ikconfig_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	struct proc_dir_entry *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	/* create the current config file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	entry = proc_create("config.gz", S_IFREG | S_IRUGO, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 			    &config_gz_proc_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	if (!entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	proc_set_size(entry, &kernel_config_data_end - &kernel_config_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static void __exit ikconfig_cleanup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 	remove_proc_entry("config.gz", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) module_init(ikconfig_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) module_exit(ikconfig_cleanup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #endif /* CONFIG_IKCONFIG_PROC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) MODULE_AUTHOR("Randy Dunlap");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) MODULE_DESCRIPTION("Echo the kernel .config file used to build the kernel");