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Commit 8562c99c authored by Matt Fleming's avatar Matt Fleming
Browse files

efi/reboot: Add generic wrapper around EfiResetSystem() 



Implement efi_reboot(), which is really just a wrapper around the
EfiResetSystem() EFI runtime service, but it does at least allow us to
funnel all callers through a single location.

It also simplifies the callsites since users no longer need to check to
see whether EFI_RUNTIME_SERVICES are enabled.

Cc: Tony Luck <tony.luck@intel.com>
Tested-by: default avatarMark Salter <msalter@redhat.com>
Signed-off-by: default avatarMatt Fleming <matt.fleming@intel.com>
parent f4f75ad5

arch/ia64/kernel/process.c

+1 −1
Original line number Diff line number Diff line
@@ -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(REBOOT_WARM, NULL);

}



void

arch/x86/kernel/reboot.c

+1 −5
Original line number Diff line number Diff line
@@ -528,11 +528,7 @@ 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);

			efi_reboot(reboot_mode, NULL);

			reboot_type = BOOT_BIOS;

			break;

drivers/firmware/efi/Makefile

+1 −1
Original line number Diff line number Diff line 
#

# Makefile for linux kernel

#

obj-$(CONFIG_EFI)			+= efi.o vars.o

obj-$(CONFIG_EFI)			+= efi.o vars.o reboot.o

obj-$(CONFIG_EFI_VARS)			+= efivars.o

obj-$(CONFIG_EFI_VARS_PSTORE)		+= efi-pstore.o

obj-$(CONFIG_UEFI_CPER)			+= cper.o

drivers/firmware/efi/reboot.c

0 → 100644
+26 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2014 Intel Corporation; author Matt Fleming

 * Copyright (c) 2014 Red Hat, Inc., Mark Salter <msalter@redhat.com>

 */

#include <linux/efi.h>

#include <linux/reboot.h>



void efi_reboot(enum reboot_mode reboot_mode, const char *__unused)

{

	int efi_mode;



	if (!efi_enabled(EFI_RUNTIME_SERVICES))

		return;



	switch (reboot_mode) {

	case REBOOT_WARM:

	case REBOOT_SOFT:

		efi_mode = EFI_RESET_WARM;

		break;

	default:

		efi_mode = EFI_RESET_COLD;

		break;

	}



	efi.reset_system(efi_mode, EFI_SUCCESS, 0, NULL);

}

include/linux/efi.h

+4 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ 
#include <linux/ioport.h>

#include <linux/pfn.h>

#include <linux/pstore.h>

#include <linux/reboot.h>



#include <asm/page.h>
@@ -928,11 +929,14 @@ static inline bool efi_enabled(int feature) 
{

	return test_bit(feature, &efi.flags) != 0;

}

extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);

#else

static inline bool efi_enabled(int feature)

{

	return false;

}

static inline void

efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}

#endif



/*