1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2019-2022 Red Hat, Inc. Daniel Bristot de Oliveira <bristot@kernel.org> 4 * 5 * Printk RV reactor: 6 * Prints the exception msg to the kernel message log. 7 */ 8 #include <linux/ftrace.h> 9 #include <linux/tracepoint.h> 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/init.h> 13 #include <linux/rv.h> 14 15 static void rv_printk_reaction(char *msg) 16 { 17 printk_deferred(msg); 18 } 19 20 static struct rv_reactor rv_printk = { 21 .name = "printk", 22 .description = "prints the exception msg to the kernel message log.", 23 .react = rv_printk_reaction 24 }; 25 26 static int __init register_react_printk(void) 27 { 28 rv_register_reactor(&rv_printk); 29 return 0; 30 } 31 32 static void __exit unregister_react_printk(void) 33 { 34 rv_unregister_reactor(&rv_printk); 35 } 36 37 module_init(register_react_printk); 38 module_exit(unregister_react_printk); 39 40 MODULE_AUTHOR("Daniel Bristot de Oliveira"); 41 MODULE_DESCRIPTION("printk rv reactor: printk if an exception is hit."); 42