From: Duncan Laurie <[email protected]> This registers a notifier for the new thermal notifier introduced in a previous commit and logs a kernel shutdown event when the notifier is called for crossing the THERMAL_TRIP_CRITICAL threshold.
To test: 1) Modify critical shutdown threshold in the BIOS 2) Generate a load on the system to increase temperature 3) Wait until system powers off 4) Power back on and read the event log: 4 | 2012-07-18 10:47:02 | Kernel Event | Critical Thermal Threshold 5 | 2012-07-18 10:47:06 | Kernel Event | Clean Shutdown 6 | 2012-07-18 10:47:06 | ACPI Enter | S5 Signed-off-by: Duncan Laurie <[email protected]> Reviewed-by: Vincent Palatin <[email protected]> Reviewed-by: Olof Johansson <[email protected]> [ rez: updated changelog for upstream ] Signed-off-by: Ross Zwisler <[email protected]> --- drivers/firmware/google/gsmi.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/firmware/google/gsmi.c b/drivers/firmware/google/gsmi.c index c8f169bf2e27d..ee0c611b83e99 100644 --- a/drivers/firmware/google/gsmi.c +++ b/drivers/firmware/google/gsmi.c @@ -29,6 +29,7 @@ #include <linux/efi.h> #include <linux/module.h> #include <linux/ucs2_string.h> +#include <linux/thermal.h> #define GSMI_SHUTDOWN_CLEAN 0 /* Clean Shutdown */ /* TODO([email protected]): Tie in HARDLOCKUP_DETECTOR with NMIWDT */ @@ -40,6 +41,7 @@ #define GSMI_SHUTDOWN_SOFTWDT 6 /* Software Watchdog */ #define GSMI_SHUTDOWN_MBE 7 /* Uncorrected ECC */ #define GSMI_SHUTDOWN_TRIPLE 8 /* Triple Fault */ +#define GSMI_SHUTDOWN_THERMAL 9 /* Critical Thermal Threshold */ #define DRIVER_VERSION "1.0" #define GSMI_GUID_SIZE 16 @@ -670,6 +672,18 @@ static struct notifier_block gsmi_panic_notifier = { .notifier_call = gsmi_panic_callback, }; +static int gsmi_thermal_callback(struct notifier_block *nb, + unsigned long reason, void *arg) +{ + if (reason == THERMAL_TRIP_CRITICAL) + gsmi_shutdown_reason(GSMI_SHUTDOWN_THERMAL); + return NOTIFY_DONE; +} + +static struct notifier_block gsmi_thermal_notifier = { + .notifier_call = gsmi_thermal_callback +}; + /* * This hash function was blatantly copied from include/linux/hash.h. * It is used by this driver to obfuscate a board name that requires a @@ -892,6 +906,7 @@ static __init int gsmi_init(void) goto out_remove_sysfs_files; } + register_thermal_notifier(&gsmi_thermal_notifier); register_reboot_notifier(&gsmi_reboot_notifier); register_die_notifier(&gsmi_die_notifier); atomic_notifier_chain_register(&panic_notifier_list, @@ -918,6 +933,7 @@ static __init int gsmi_init(void) static void __exit gsmi_exit(void) { + unregister_thermal_notifier(&gsmi_thermal_notifier); unregister_reboot_notifier(&gsmi_reboot_notifier); unregister_die_notifier(&gsmi_die_notifier); atomic_notifier_chain_unregister(&panic_notifier_list, -- 2.19.1.568.g152ad8e336-goog
