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 <[EMAIL PROTECTED]>
Signed-off-by: Huang Ying <[EMAIL PROTECTED]>
---
arch/x86/kernel/reboot_64.c | 20 +++++++++++++-------
include/asm-x86/emergency-restart.h | 9 +++++++++
2 files changed, 22 insertions(+), 7 deletions(-)
--- a/arch/x86/kernel/reboot_64.c
+++ b/arch/x86/kernel/reboot_64.c
@@ -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>
@@ -27,20 +28,17 @@ 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)
@@ -59,6 +57,7 @@ static int __init reboot_setup(char *str
case 'a':
case 'b':
case 'k':
+ case 'e':
reboot_type = *str;
break;
case 'f':
@@ -151,7 +150,14 @@ 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;
+ }
}
}
--- a/include/asm-x86/emergency-restart.h
+++ b/include/asm-x86/emergency-restart.h
@@ -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 */
-
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