i86hvm/io/hvm_bootstrap.c

	hvm_bootstrap.c revision eb0cc229f19c437a6b538d3ac0d0443268290b7e
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <sys/modctl.h>
#include <sys/sunddi.h>
#include <sys/sunndi.h>

/*
 * The hvm_bootstrap misc module is installed in the i86hvm platform
 * directly so it will only be loaded in HVM emulated environment.
 */


/*
 * hvmboot_rootconf() exists to force attach all xdf disk driver nodes
 * before the pv cmdk disk driver comes along and tries to access any of
 * these nodes (which usually happens when mounting the root disk device
 * in an hvm environment).  See the block comments at the top of pv_cmdk.c
 * for more information about why this is necessary.
 */
int
hvmboot_rootconf()
{
    dev_info_t  *xpvd_dip;
    major_t     xdf_major;

    xdf_major = ddi_name_to_major("xdf");
    if (xdf_major == (major_t)-1)
        cmn_err(CE_PANIC, "unable to load xdf disk driver");

    if (resolve_pathname("/xpvd", &xpvd_dip, NULL, NULL) != 0)
        cmn_err(CE_PANIC, "unable to configure /xpvd nexus");

    (void) ndi_devi_config_driver(xpvd_dip, 0, xdf_major);

    ndi_rele_devi(xpvd_dip);
    return (0);
}

static struct modlmisc modlmisc = {
    &mod_miscops, "hvm_bootstrap misc module"
};

static struct modlinkage modlinkage = {
    MODREV_1, (void *)&modlmisc, NULL
};

int
_info(struct modinfo *modinfop)
{
    return (mod_info(&modlinkage, modinfop));
}

int
_init()
{
    return (mod_install(&modlinkage));
}

int
_fini()
{
    return (EBUSY);
}