x86: EFI runtime service support: EFI runtime services

[sfrench/cifs-2.6.git] / arch / x86 / kernel / reboot_64.c

diff --git a/arch/x86/kernel/reboot_64.c b/arch/x86/kernel/reboot_64.c
index 307f996a39331ce63bfde75160f429d037e2f92b..d6bdf93ffca996a3e079c958e217d713a38c6e19 100644 (file)
--- 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>
@@ -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;
+               }
        }      
 }