diff options
| -rw-r--r-- | arch/x86/kernel/reboot.c | 12 | ||||
| -rw-r--r-- | include/linux/reboot.h | 5 |
2 files changed, 12 insertions, 5 deletions
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c index 76fa1e9a2b39..f7703401d6cb 100644 --- a/arch/x86/kernel/reboot.c +++ b/arch/x86/kernel/reboot.c @@ -36,7 +36,7 @@ void (*pm_power_off)(void); EXPORT_SYMBOL(pm_power_off); static const struct desc_ptr no_idt = {}; -static int reboot_mode; +static enum reboot_mode reboot_mode; enum reboot_type reboot_type = BOOT_ACPI; int reboot_force; @@ -88,11 +88,11 @@ static int __init reboot_setup(char *str) switch (*str) { case 'w': - reboot_mode = 0x1234; + reboot_mode = REBOOT_WARM; break; case 'c': - reboot_mode = 0; + reboot_mode = REBOOT_COLD; break; #ifdef CONFIG_SMP @@ -536,6 +536,7 @@ static void native_machine_emergency_restart(void) int i; int attempt = 0; int orig_reboot_type = reboot_type; + unsigned short mode; if (reboot_emergency) emergency_vmx_disable_all(); @@ -543,7 +544,8 @@ static void native_machine_emergency_restart(void) tboot_shutdown(TB_SHUTDOWN_REBOOT); /* Tell the BIOS if we want cold or warm reboot */ - *((unsigned short *)__va(0x472)) = reboot_mode; + mode = reboot_mode == REBOOT_WARM ? 0x1234 : 0; + *((unsigned short *)__va(0x472)) = mode; for (;;) { /* Could also try the reset bit in the Hammer NB */ @@ -585,7 +587,7 @@ static void native_machine_emergency_restart(void) case BOOT_EFI: if (efi_enabled(EFI_RUNTIME_SERVICES)) - efi.reset_system(reboot_mode ? + efi.reset_system(reboot_mode == REBOOT_WARM ? EFI_RESET_WARM : EFI_RESET_COLD, EFI_SUCCESS, 0, NULL); diff --git a/include/linux/reboot.h b/include/linux/reboot.h index c6eba210e592..37d56c356a06 100644 --- a/include/linux/reboot.h +++ b/include/linux/reboot.h @@ -10,6 +10,11 @@ #define SYS_HALT 0x0002 /* Notify of system halt */ #define SYS_POWER_OFF 0x0003 /* Notify of system power off */ +enum reboot_mode { + REBOOT_COLD = 0, + REBOOT_WARM, +}; + extern int register_reboot_notifier(struct notifier_block *); extern int unregister_reboot_notifier(struct notifier_block *); |