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#define __KERNEL_SYSCALLS__
static int errno;
#include <linux/errno.h>
#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/unistd.h>
#include <linux/module.h>
#include <linux/reboot.h>
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm-xen/ctrl_if.h>
#include <asm-xen/hypervisor.h>
#include <asm-xen/hypervisor-ifs/dom0_ops.h>
#include <asm-xen/suspend.h>
#include <asm-xen/queues.h>
void machine_restart(char * __unused)
{
/* We really want to get pending console data out before we die. */
extern void xencons_force_flush(void);
xencons_force_flush();
HYPERVISOR_reboot();
}
void machine_halt(void)
{
machine_power_off();
}
void machine_power_off(void)
{
/* We really want to get pending console data out before we die. */
extern void xencons_force_flush(void);
xencons_force_flush();
HYPERVISOR_shutdown();
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
int reboot_thru_bios = 0; /* for dmi_scan.c */
EXPORT_SYMBOL(machine_restart);
EXPORT_SYMBOL(machine_halt);
EXPORT_SYMBOL(machine_power_off);
#endif
/******************************************************************************
* Stop/pickle callback handling.
*/
#include <asm/suspend.h>
/* Ignore multiple shutdown requests. */
static int shutting_down = -1;
static void __do_suspend(void)
{
int i, j;
suspend_record_t *suspend_record;
/* Hmmm... a cleaner interface to suspend/resume blkdevs would be nice. */
/* XXX SMH: yes it would :-( */
#ifdef CONFIG_XEN_BLKDEV_FRONTEND
extern void blkdev_suspend(void);
extern void blkdev_resume(void);
#else
#define blkdev_suspend() do{}while(0)
#define blkdev_resume() do{}while(0)
#endif
#ifdef CONFIG_XEN_NETDEV_FRONTEND
extern void netif_suspend(void);
extern void netif_resume(void);
#else
#define netif_suspend() do{}while(0)
#define netif_resume() do{}while(0)
#endif
extern void time_suspend(void);
extern void time_resume(void);
extern unsigned long max_pfn;
extern unsigned long *pfn_to_mfn_frame_list;
suspend_record = (suspend_record_t *)__get_free_page(GFP_KERNEL);
if ( suspend_record == NULL )
goto out;
suspend_record->nr_pfns = max_pfn; /* final number of pfns */
__cli();
netif_suspend();
blkdev_suspend();
time_suspend();
ctrl_if_suspend();
irq_suspend();
HYPERVISOR_shared_info = (shared_info_t *)empty_zero_page;
clear_fixmap(FIX_SHARED_INFO);
memcpy(&suspend_record->resume_info, &xen_start_info, sizeof(xen_start_info));
HYPERVISOR_suspend(virt_to_machine(suspend_record) >> PAGE_SHIFT);
HYPERVISOR_vm_assist(VMASST_CMD_enable,
VMASST_TYPE_4gb_segments);
#ifdef CONFIG_XEN_WRITABLE_PAGETABLES
HYPERVISOR_vm_assist(VMASST_CMD_enable,
VMASST_TYPE_writable_pagetables);
#endif
shutting_down = -1;
memcpy(&xen_start_info, &suspend_record->resume_info, sizeof(xen_start_info));
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
set_fixmap_ma(FIX_SHARED_INFO, xen_start_info.shared_info);
#else
set_fixmap(FIX_SHARED_INFO, xen_start_info.shared_info);
#endif
HYPERVISOR_shared_info = (shared_info_t *)fix_to_virt(FIX_SHARED_INFO);
memset(empty_zero_page, 0, PAGE_SIZE);
for ( i=0, j=0; i < max_pfn; i+=(PAGE_SIZE/sizeof(unsigned long)), j++ )
{
pfn_to_mfn_frame_list[j] =
virt_to_machine(&phys_to_machine_mapping[i]) >> PAGE_SHIFT;
}
HYPERVISOR_shared_info->arch.pfn_to_mfn_frame_list =
virt_to_machine(pfn_to_mfn_frame_list) >> PAGE_SHIFT;
irq_resume();
ctrl_if_resume();
time_resume();
blkdev_resume();
netif_resume();
__sti();
out:
if ( suspend_record != NULL )
free_page((unsigned long)suspend_record);
}
static int shutdown_process(void *__unused)
{
static char *envp[] = { "HOME=/", "TERM=linux",
"PATH=/sbin:/usr/sbin:/bin:/usr/bin", NULL };
static char *restart_argv[] = { "/sbin/shutdown", "-r", "now", NULL };
static char *poweroff_argv[] = { "/sbin/halt", "-p", NULL };
extern asmlinkage long sys_reboot(int magic1, int magic2,
unsigned int cmd, void *arg);
daemonize(
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
"shutdown"
#endif
);
switch ( shutting_down )
{
case CMSG_SHUTDOWN_POWEROFF:
if ( execve("/sbin/halt", poweroff_argv, envp) < 0 )
{
sys_reboot(LINUX_REBOOT_MAGIC1,
LINUX_REBOOT_MAGIC2,
LINUX_REBOOT_CMD_POWER_OFF,
NULL);
}
break;
case CMSG_SHUTDOWN_REBOOT:
if ( execve("/sbin/shutdown", restart_argv, envp) < 0 )
{
sys_reboot(LINUX_REBOOT_MAGIC1,
LINUX_REBOOT_MAGIC2,
LINUX_REBOOT_CMD_RESTART,
NULL);
}
break;
}
shutting_down = -1; /* could try again */
return 0;
}
static void __shutdown_handler(void *unused)
{
int err;
if ( shutting_down != CMSG_SHUTDOWN_SUSPEND )
{
err = kernel_thread(shutdown_process, NULL, CLONE_FS | CLONE_FILES);
if ( err < 0 )
printk(KERN_ALERT "Error creating shutdown process!\n");
}
else
{
__do_suspend();
}
}
static void shutdown_handler(ctrl_msg_t *msg, unsigned long id)
{
static DECLARE_WORK(shutdown_work, __shutdown_handler, NULL);
if ( (shutting_down == -1) &&
((msg->subtype == CMSG_SHUTDOWN_POWEROFF) ||
(msg->subtype == CMSG_SHUTDOWN_REBOOT) ||
(msg->subtype == CMSG_SHUTDOWN_SUSPEND)) )
{
shutting_down = msg->subtype;
schedule_work(&shutdown_work);
}
else
{
printk("Ignore spurious shutdown request\n");
}
ctrl_if_send_response(msg);
}
static int __init setup_shutdown_event(void)
{
ctrl_if_register_receiver(CMSG_SHUTDOWN, shutdown_handler, 0);
return 0;
}
__initcall(setup_shutdown_event);
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