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x86: EFI runtime service support: EFI runtime services 

This patch adds support for several EFI runtime services for EFI x86_64
system.

The EFI support for emergency_restart is added.

Signed-off-by: Chandramouli Narayanan <mouli@linux.intel.com>
Signed-off-by: Huang Ying <ying.huang@intel.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
hifive-unleashed-5.1
Huang, Ying 2008-01-30 13:31:19 +01:00 committed by Ingo Molnar
parent 5b83683f32
commit de18c850af
2 changed files with 22 additions and 7 deletions
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20
arch/x86/kernel/reboot_64.c
View File

@ -9,6 +9,7 @@
#include <linux/pm.h>
#include <linux/kdebug.h>
#include <linux/sched.h>
#include <linux/efi.h>
#include <acpi/reboot.h>
#include <asm/io.h>
#include <asm/delay.h>
@ -28,20 +29,17 @@ void (*pm_power_off)(void);
EXPORT_SYMBOL(pm_power_off);
static long no_idt[3];
static enum {
BOOT_TRIPLE = 't',
BOOT_KBD = 'k',
BOOT_ACPI = 'a'
} reboot_type = BOOT_KBD;
enum reboot_type reboot_type = BOOT_KBD;
static int reboot_mode = 0;
int reboot_force;
/* reboot=t[riple] | k[bd] [, [w]arm | [c]old]
/* reboot=t[riple] | k[bd] | e[fi] [, [w]arm | [c]old]
warm Don't set the cold reboot flag
cold Set the cold reboot flag
triple Force a triple fault (init)
kbd Use the keyboard controller. cold reset (default)
acpi Use the RESET_REG in the FADT
efi Use efi reset_system runtime service
force Avoid anything that could hang.
*/
static int __init reboot_setup(char *str)
@ -60,6 +58,7 @@ static int __init reboot_setup(char *str)
case 'a':
case 'b':
case 'k':
case 'e':
reboot_type = *str;
break;
case 'f':
@ -155,7 +154,14 @@ void machine_emergency_restart(void)
acpi_reboot();
reboot_type = BOOT_KBD;
break;
}
case BOOT_EFI:
if (efi_enabled)
efi.reset_system(reboot_mode ? EFI_RESET_WARM : EFI_RESET_COLD,
EFI_SUCCESS, 0, NULL);
reboot_type = BOOT_KBD;
break;
}
}
}

9
include/asm-x86/emergency-restart.h
View File

@ -1,6 +1,15 @@
#ifndef _ASM_EMERGENCY_RESTART_H
#define _ASM_EMERGENCY_RESTART_H
enum reboot_type {
BOOT_TRIPLE = 't',
BOOT_KBD = 'k',
BOOT_ACPI = 'a',
BOOT_EFI = 'e'
};
extern enum reboot_type reboot_type;
extern void machine_emergency_restart(void);
#endif /* _ASM_EMERGENCY_RESTART_H */