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Subject[PATCH 3/5] efi: Add common efi_reboot() implementation
Date
From: Matt Fleming <matt.fleming@intel.com>

The reboot functionality is the same for all EFI implementations, so
provide a wrapper that is useable by all architectures.

Cc: Leif Lindholm <leif.lindholm@linaro.org>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
---
arch/ia64/kernel/process.c | 2 +-
arch/x86/kernel/reboot.c | 14 +++++++++-----
drivers/firmware/efi/Makefile | 2 +-
drivers/firmware/efi/reboot.c | 25 +++++++++++++++++++++++++
include/linux/efi.h | 2 ++
5 files changed, 38 insertions(+), 7 deletions(-)
create mode 100644 drivers/firmware/efi/reboot.c

diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index 55d4ba4..2b55b8e 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -662,7 +662,7 @@ void
machine_restart (char *restart_cmd)
{
(void) notify_die(DIE_MACHINE_RESTART, restart_cmd, NULL, 0, 0, 0);
- (*efi.reset_system)(EFI_RESET_WARM, 0, 0, NULL);
+ efi_reboot(EFI_RESET_WARM);
}

void
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 563ed91..78a1c67 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -497,11 +497,15 @@ static void native_machine_emergency_restart(void)
break;

case BOOT_EFI:
- if (efi_enabled(EFI_RUNTIME_SERVICES))
- efi.reset_system(reboot_mode == REBOOT_WARM ?
- EFI_RESET_WARM :
- EFI_RESET_COLD,
- EFI_SUCCESS, 0, NULL);
+ if (efi_enabled(EFI_RUNTIME_SERVICES)) {
+ int mode = EFI_RESET_COLD;
+
+ if (reboot_mode == REBOOT_WARM)
+ mode = EFI_RESET_WARM;
+
+ efi_reboot(mode);
+ }
+
reboot_type = BOOT_KBD;
break;

diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile
index 99245ab..6375e14 100644
--- a/drivers/firmware/efi/Makefile
+++ b/drivers/firmware/efi/Makefile
@@ -1,6 +1,6 @@
#
# Makefile for linux kernel
#
-obj-y += efi.o vars.o
+obj-y += efi.o vars.o reboot.o
obj-$(CONFIG_EFI_VARS) += efivars.o
obj-$(CONFIG_EFI_VARS_PSTORE) += efi-pstore.o
diff --git a/drivers/firmware/efi/reboot.c b/drivers/firmware/efi/reboot.c
new file mode 100644
index 0000000..f9f34eb
--- /dev/null
+++ b/drivers/firmware/efi/reboot.c
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2013 Intel Corporation <matt.fleming@intel.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ */
+
+#include <linux/efi.h>
+
+void efi_reboot(int mode)
+{
+ switch (mode) {
+ case EFI_RESET_COLD:
+ case EFI_RESET_WARM:
+ case EFI_RESET_SHUTDOWN:
+ case EFI_RESET_PLATFORM_SPECIFIC:
+ break;
+ default:
+ printk("efi: invalid reboot mode %d\n", mode);
+ return;
+ }
+
+ efi.reset_system(mode, EFI_SUCCESS, 0, NULL);
+}
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 153df45..eed69c9 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -283,6 +283,7 @@ typedef struct {
#define EFI_RESET_COLD 0
#define EFI_RESET_WARM 1
#define EFI_RESET_SHUTDOWN 2
+#define EFI_RESET_PLATFORM_SPECIFIC 3

/*
* EFI Runtime Services table
@@ -591,6 +592,7 @@ extern void efi_map_pal_code (void);
extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
extern void efi_gettimeofday (struct timespec *ts);
extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
+extern void efi_reboot(int mode);
#ifdef CONFIG_X86
extern void efi_late_init(void);
extern void efi_free_boot_services(void);
--
1.8.1.4


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