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/*
* Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
FILE_LICENCE ( GPL2_OR_LATER );
/** @file
*
* VMware backdoor mechanism
*
* Based on the unofficial documentation at
*
* http://sites.google.com/site/chitchatvmback/backdoor
*
*/
#include <stdint.h>
#include <errno.h>
#include <ipxe/vmware.h>
/**
* Detect VMware presence
*
* @ret rc Return status code
*/
int vmware_present ( void ) {
uint32_t version;
uint32_t magic;
uint32_t product_type;
/* Perform backdoor call */
vmware_cmd_get_version ( &version, &magic, &product_type );
/* Check for VMware presence */
if ( magic != VMW_MAGIC ) {
DBGC ( VMW_MAGIC, "VMware not present\n" );
return -ENOENT;
}
DBGC ( VMW_MAGIC, "VMware product type %04x version %08x detected\n",
product_type, version );
return 0;
}
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