| 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(reactor: &rv_printk); |
| 29 | return 0; |
| 30 | } |
| 31 | |
| 32 | static void __exit unregister_react_printk(void) |
| 33 | { |
| 34 | rv_unregister_reactor(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 |