usr/src/uts/i86pc/i86hvm/io/cmdk.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*
  28  * Fake cmdk module. Prevents the real cmdk driver from loading in
  29  * a xen HVM domain so that xdf may operate instead.
  30  */
  31
  32 #include <sys/sunddi.h>
  33 #include <sys/errno.h>
  34 #include <sys/modctl.h>
  35
  36 /*ARGSUSED*/
  37 static int
  38 stubattach(dev_info_t *dip, ddi_attach_cmd_t cmd)
  39 {
  40         return (DDI_SUCCESS);
  41 }
  42
  43 /*ARGSUSED*/
  44 static int
  45 stubdetach(dev_info_t *dip, ddi_detach_cmd_t cmd)
  46 {
  47         return (DDI_SUCCESS);
  48 }
  49
  50 static struct dev_ops stub_ops = {
  51         DEVO_REV,
  52         0,
  53         NULL,
  54         nulldev,
  55         nulldev,
  56         stubattach,
  57         stubdetach,
  58         nodev,
  59         NULL,
  60         NULL,
  61         NULL,
  62         ddi_quiesce_not_needed
  63 };
  64
  65 static struct modldrv modldrv = {
  66         &mod_driverops,
  67         "xVM cmdk stub",
  68         &stub_ops
  69 };
  70
  71 static struct modlinkage modlinkage = {
  72         MODREV_1, (void *)&modldrv, NULL
  73 };
  74
  75 int
  76 _init(void)
  77 {
  78         return (mod_install(&modlinkage));
  79 }
  80
  81 int
  82 _info(struct modinfo *modinfop)
  83 {
  84         return (mod_info(&modlinkage, modinfop));
  85 }
  86
  87 int
  88 _fini(void)
  89 {
  90         return (EBUSY);
  91 }