1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/debugfs.h> 3 #include <linux/seq_file.h> 4 5 #include <asm/ptdump.h> 6 7 static int ptdump_show(struct seq_file *m, void *v) 8 { 9 struct ptdump_info *info = m->private; 10 11 ptdump_walk_pgd(m, info); 12 return 0; 13 } 14 15 static int ptdump_open(struct inode *inode, struct file *file) 16 { 17 return single_open(file, ptdump_show, inode->i_private); 18 } 19 20 static const struct file_operations ptdump_fops = { 21 .open = ptdump_open, 22 .read = seq_read, 23 .llseek = seq_lseek, 24 .release = single_release, 25 }; 26 27 void ptdump_debugfs_register(struct ptdump_info *info, const char *name) 28 { 29 debugfs_create_file(name, 0400, NULL, info, &ptdump_fops); 30 } 31