cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

poweroff.c (992B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * poweroff.c - sysrq handler to gracefully power down machine.
      4 */
      5
      6#include <linux/kernel.h>
      7#include <linux/sysrq.h>
      8#include <linux/init.h>
      9#include <linux/pm.h>
     10#include <linux/workqueue.h>
     11#include <linux/reboot.h>
     12#include <linux/cpumask.h>
     13
     14/*
     15 * When the user hits Sys-Rq o to power down the machine this is the
     16 * callback we use.
     17 */
     18
     19static void do_poweroff(struct work_struct *dummy)
     20{
     21	kernel_power_off();
     22}
     23
     24static DECLARE_WORK(poweroff_work, do_poweroff);
     25
     26static void handle_poweroff(int key)
     27{
     28	/* run sysrq poweroff on boot cpu */
     29	schedule_work_on(cpumask_first(cpu_online_mask), &poweroff_work);
     30}
     31
     32static const struct sysrq_key_op	sysrq_poweroff_op = {
     33	.handler        = handle_poweroff,
     34	.help_msg       = "poweroff(o)",
     35	.action_msg     = "Power Off",
     36	.enable_mask	= SYSRQ_ENABLE_BOOT,
     37};
     38
     39static int __init pm_sysrq_init(void)
     40{
     41	register_sysrq_key('o', &sysrq_poweroff_op);
     42	return 0;
     43}
     44
     45subsys_initcall(pm_sysrq_init);