From 07f3331c6bfd27a06dfb0ca9fa4f06dec6606876 Mon Sep 17 00:00:00 2001
From: Jeremy Fitzhardinge <jeremy@goop.org>
Date: Wed, 2 May 2007 19:27:11 +0200
Subject: [PATCH] [PATCH] i386: Add machine_ops interface to abstract halting
and rebooting
machine_ops is an interface for the machine_* functions defined in
<linux/reboot.h>. This is intended to allow hypervisors to intercept
the reboot process, but it could be used to implement other x86
subarchtecture reboots.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Andi Kleen <ak@suse.de>
---
arch/i386/kernel/apm.c | 3 +--
arch/i386/kernel/reboot.c | 43 ++++++++++++++++++++++++++++++++++-----
include/asm-i386/reboot.h | 20 ++++++++++++++++++
3 files changed, 59 insertions(+), 7 deletions(-)
create mode 100644 include/asm-i386/reboot.h
diff --git a/arch/i386/kernel/apm.c b/arch/i386/kernel/apm.c
index 4d073d390715..367ff1d930cb 100644
--- a/arch/i386/kernel/apm.c
+++ b/arch/i386/kernel/apm.c
@@ -233,11 +233,10 @@
#include <asm/desc.h>
#include <asm/i8253.h>
#include <asm/paravirt.h>
+#include <asm/reboot.h>
#include "io_ports.h"
-extern void machine_real_restart(unsigned char *, int);
-
#if defined(CONFIG_APM_DISPLAY_BLANK) && defined(CONFIG_VT)
extern int (*console_blank_hook)(int);
#endif
diff --git a/arch/i386/kernel/reboot.c b/arch/i386/kernel/reboot.c
index 8b5ff6e15412..14b4de2882be 100644
--- a/arch/i386/kernel/reboot.c
+++ b/arch/i386/kernel/reboot.c
@@ -18,6 +18,7 @@
#include <asm/desc.h>
#include "mach_reboot.h"
#include <asm/reboot_fixups.h>
+#include <asm/reboot.h>
/*
* Power off function, if any
@@ -280,7 +281,7 @@ void machine_real_restart(unsigned char *code, int length)
EXPORT_SYMBOL(machine_real_restart);
#endif
-void machine_shutdown(void)
+static void native_machine_shutdown(void)
{
#ifdef CONFIG_SMP
int reboot_cpu_id;
@@ -320,7 +321,7 @@ void __attribute__((weak)) mach_reboot_fixups(void)
{
}
-void machine_emergency_restart(void)
+static void native_machine_emergency_restart(void)
{
if (!reboot_thru_bios) {
if (efi_enabled) {
@@ -344,17 +345,17 @@ void machine_emergency_restart(void)
machine_real_restart(jump_to_bios, sizeof(jump_to_bios));
}
-void machine_restart(char * __unused)
+static void native_machine_restart(char * __unused)
{
machine_shutdown();
machine_emergency_restart();
}
-void machine_halt(void)
+static void native_machine_halt(void)
{
}
-void machine_power_off(void)
+static void native_machine_power_off(void)
{
if (pm_power_off) {
machine_shutdown();
@@ -363,3 +364,35 @@ void machine_power_off(void)
}
+struct machine_ops machine_ops = {
+ .power_off = native_machine_power_off,
+ .shutdown = native_machine_shutdown,
+ .emergency_restart = native_machine_emergency_restart,
+ .restart = native_machine_restart,
+ .halt = native_machine_halt,
+};
+
+void machine_power_off(void)
+{
+ machine_ops.power_off();
+}
+
+void machine_shutdown(void)
+{
+ machine_ops.shutdown();
+}
+
+void machine_emergency_restart(void)
+{
+ machine_ops.emergency_restart();
+}
+
+void machine_restart(char *cmd)
+{
+ machine_ops.restart(cmd);
+}
+
+void machine_halt(void)
+{
+ machine_ops.halt();
+}
diff --git a/include/asm-i386/reboot.h b/include/asm-i386/reboot.h
new file mode 100644
index 000000000000..e9e3ffc22c07
--- /dev/null
+++ b/include/asm-i386/reboot.h
@@ -0,0 +1,20 @@
+#ifndef _ASM_REBOOT_H
+#define _ASM_REBOOT_H
+
+struct pt_regs;
+
+struct machine_ops
+{
+ void (*restart)(char *cmd);
+ void (*halt)(void);
+ void (*power_off)(void);
+ void (*shutdown)(void);
+ void (*crash_shutdown)(struct pt_regs *);
+ void (*emergency_restart)(void);
+};
+
+extern struct machine_ops machine_ops;
+
+void machine_real_restart(unsigned char *code, int length);
+
+#endif /* _ASM_REBOOT_H */
--
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