[vmware] Add GuestRPC mechanism

Use the VMware backdoor I/O port to access the GuestRPC mechanism.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

1 files changed, 57 insertions, 0 deletions

diff --git a/src/arch/i386/interface/vmware/vmware.c b/src/arch/i386/interface/vmware/vmware.c
new file mode 100644
index 000000000..8cc26c946
--- /dev/null
+++ b/src/arch/i386/interface/vmware/vmware.c
@@ -0,0 +1,57 @@
+/*
+ * 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., 675 Mass Ave, Cambridge, MA 02139, 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;
+}