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Sample reactor that panics the system when an exception is found. This is useful both to capture a vmcore, or to fail-safe a critical system. Cc: Wim Van Sebroeck <wim@linux-watchdog.org> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Will Deacon <will@kernel.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Marco Elver <elver@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: "Paul E. McKenney" <paulmck@kernel.org> Cc: Shuah Khan <skhan@linuxfoundation.org> Cc: Gabriele Paoloni <gpaoloni@redhat.com> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Clark Williams <williams@redhat.com> Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-trace-devel@vger.kernel.org Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
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// SPDX-License-Identifier: GPL-2.0 | ||
/* | ||
* Panic RV reactor: | ||
* Prints the exception msg to the kernel message log and panic(). | ||
* | ||
* Copyright (C) 2019-2022 Daniel Bristot de Oliveira <bristot@kernel.org> | ||
* | ||
*/ | ||
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#include <linux/ftrace.h> | ||
#include <linux/tracepoint.h> | ||
#include <linux/kernel.h> | ||
#include <linux/module.h> | ||
#include <linux/init.h> | ||
#include <linux/rv.h> | ||
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static void rv_panic_reaction(char *msg) | ||
{ | ||
panic(msg); | ||
} | ||
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struct rv_reactor rv_panic = { | ||
.name = "panic", | ||
.description = "panic the system if an exception is found.", | ||
.react = rv_panic_reaction | ||
}; | ||
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int register_react_panic(void) | ||
{ | ||
rv_register_reactor(&rv_panic); | ||
return 0; | ||
} | ||
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void unregister_react_panic(void) | ||
{ | ||
rv_unregister_reactor(&rv_panic); | ||
} | ||
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module_init(register_react_panic); | ||
module_exit(unregister_react_panic); | ||
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MODULE_LICENSE("GPL"); | ||
MODULE_AUTHOR("Daniel Bristot de Oliveira"); | ||
MODULE_DESCRIPTION("panic rv reactor: panic if an exception is found"); |