Ejemplo n.º 1
0
/* Cleaning up is just the same code, backwards.  With a little French. */
static void __exit fini(void)
{
	lguest_device_remove();
	free_interrupts();
	free_pagetables();
	unmap_switcher();

	lguest_arch_host_fini();
}
Ejemplo n.º 2
0
/*H:000
 * Welcome to the Host!
 *
 * By this point your brain has been tickled by the Guest code and numbed by
 * the Launcher code; prepare for it to be stretched by the Host code.  This is
 * the heart.  Let's begin at the initialization routine for the Host's lg
 * module.
 */
static int __init init(void)
{
	int err;

	/* Lguest can't run under Xen, VMI or itself.  It does Tricky Stuff. */
	if (paravirt_enabled()) {
		printk("lguest is afraid of being a guest\n");
		return -EPERM;
	}

	/* First we put the Switcher up in very high virtual memory. */
	err = map_switcher();
	if (err)
		goto out;

	/* Now we set up the pagetable implementation for the Guests. */
	err = init_pagetables(switcher_page, SHARED_SWITCHER_PAGES);
	if (err)
		goto unmap;

	/* We might need to reserve an interrupt vector. */
	err = init_interrupts();
	if (err)
		goto free_pgtables;

	/* /dev/lguest needs to be registered. */
	err = lguest_device_init();
	if (err)
		goto free_interrupts;

	/* Finally we do some architecture-specific setup. */
	lguest_arch_host_init();

	/* All good! */
	return 0;

free_interrupts:
	free_interrupts();
free_pgtables:
	free_pagetables();
unmap:
	unmap_switcher();
out:
	return err;
}
Ejemplo n.º 3
0
static int __init init(void)
{
	int err;

	
	if (paravirt_enabled()) {
		printk("lguest is afraid of being a guest\n");
		return -EPERM;
	}

	
	err = map_switcher();
	if (err)
		goto out;

	
	err = init_pagetables(switcher_page, SHARED_SWITCHER_PAGES);
	if (err)
		goto unmap;

	
	err = init_interrupts();
	if (err)
		goto free_pgtables;

	
	err = lguest_device_init();
	if (err)
		goto free_interrupts;

	
	lguest_arch_host_init();

	
	return 0;

free_interrupts:
	free_interrupts();
free_pgtables:
	free_pagetables();
unmap:
	unmap_switcher();
out:
	return err;
}