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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /kernel/power/poweroff.c | |
parent | Initial commit. (diff) | |
download | linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'kernel/power/poweroff.c')
-rw-r--r-- | kernel/power/poweroff.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/kernel/power/poweroff.c b/kernel/power/poweroff.c new file mode 100644 index 000000000..562aa0e45 --- /dev/null +++ b/kernel/power/poweroff.c @@ -0,0 +1,45 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * poweroff.c - sysrq handler to gracefully power down machine. + */ + +#include <linux/kernel.h> +#include <linux/sysrq.h> +#include <linux/init.h> +#include <linux/pm.h> +#include <linux/workqueue.h> +#include <linux/reboot.h> +#include <linux/cpumask.h> + +/* + * When the user hits Sys-Rq o to power down the machine this is the + * callback we use. + */ + +static void do_poweroff(struct work_struct *dummy) +{ + kernel_power_off(); +} + +static DECLARE_WORK(poweroff_work, do_poweroff); + +static void handle_poweroff(int key) +{ + /* run sysrq poweroff on boot cpu */ + schedule_work_on(cpumask_first(cpu_online_mask), &poweroff_work); +} + +static const struct sysrq_key_op sysrq_poweroff_op = { + .handler = handle_poweroff, + .help_msg = "poweroff(o)", + .action_msg = "Power Off", + .enable_mask = SYSRQ_ENABLE_BOOT, +}; + +static int __init pm_sysrq_init(void) +{ + register_sysrq_key('o', &sysrq_poweroff_op); + return 0; +} + +subsys_initcall(pm_sysrq_init); |