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[PATCH] i386: Add machine_ops interface to abstract halting and rebooting

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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>
This commit is contained in:
Jeremy Fitzhardinge 2007-05-02 19:27:11 +02:00 committed by Andi Kleen
parent 01a2f43556
commit 07f3331c6b
3 changed files with 59 additions and 7 deletions
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3
arch/i386/kernel/apm.c
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@ -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

43
arch/i386/kernel/reboot.c
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@ -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();
}

20
include/asm-i386/reboot.h Normal file
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@ -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 */