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vmware.c 1.5KB

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  1. /*
  2. * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
  3. *
  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.
  8. *
  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.
  13. *
  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
  17. * 02110-1301, USA.
  18. */
  19. FILE_LICENCE ( GPL2_OR_LATER );
  20. /** @file
  21. *
  22. * VMware backdoor mechanism
  23. *
  24. * Based on the unofficial documentation at
  25. *
  26. * http://sites.google.com/site/chitchatvmback/backdoor
  27. *
  28. */
  29. #include <stdint.h>
  30. #include <errno.h>
  31. #include <ipxe/vmware.h>
  32. /**
  33. * Detect VMware presence
  34. *
  35. * @ret rc Return status code
  36. */
  37. int vmware_present ( void ) {
  38. uint32_t version;
  39. uint32_t magic;
  40. uint32_t product_type;
  41. /* Perform backdoor call */
  42. vmware_cmd_get_version ( &version, &magic, &product_type );
  43. /* Check for VMware presence */
  44. if ( magic != VMW_MAGIC ) {
  45. DBGC ( VMW_MAGIC, "VMware not present\n" );
  46. return -ENOENT;
  47. }
  48. DBGC ( VMW_MAGIC, "VMware product type %04x version %08x detected\n",
  49. product_type, version );
  50. return 0;
  51. }