2 * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20 FILE_LICENCE ( GPL2_OR_LATER );
24 * VMware backdoor mechanism
26 * Based on the unofficial documentation at
28 * http://sites.google.com/site/chitchatvmback/backdoor
34 #include <ipxe/vmware.h>
37 * Detect VMware presence
39 * @ret rc Return status code
41 int vmware_present ( void ) {
44 uint32_t product_type;
46 /* Perform backdoor call */
47 vmware_cmd_get_version ( &version, &magic, &product_type );
49 /* Check for VMware presence */
50 if ( magic != VMW_MAGIC ) {
51 DBGC ( VMW_MAGIC, "VMware not present\n" );
55 DBGC ( VMW_MAGIC, "VMware product type %04x version %08x detected\n",
56 product_type, version );