VMware backdoor mechanism. More...

#include <stdint.h>

Macros
#define	VMW_PORT 0x5658
	VMware backdoor I/O port. More...

#define	VMW_MAGIC 0x564d5868 /* "VMXh" */
	VMware backdoor magic value. More...

#define	VMW_BACKDOOR "inl %%dx, %%eax"
	VMware backdoor magic instruction. More...

#define	VMW_CMD_GET_VERSION 0x0a
	Get VMware version. More...

#define	VMW_CMD_GUESTRPC 0x1e
	Issue GuestRPC command. More...

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)

static	__attribute__ ((always_inline)) void vmware_cmd_get_version(uint32_t *version
	Get VMware version. More...

__asm__	__volatile__ (VMW_BACKDOOR :"=a"(version), "=b"(magic), "=c"(*product_type), "=d"(discard_d) :"0"(VMW_MAGIC), "1"(0), "2"(VMW_CMD_GET_VERSION), "3"(VMW_PORT))

int	vmware_present (void)
	Detect VMware presence. More...

Variables
static uint32_t *	magic

static uint32_t uint32_t *	product_type

static uint16_t	subcommand

static uint16_t uint32_t	parameter

static uint16_t uint32_t uint16_t *	edxhi = ( edx >> 16 )

static uint16_t uint32_t uint16_t uint32_t *	ebx

uint32_t	status

uint32_t	edx

Detailed Description

VMware backdoor mechanism.

Definition in file vmware.h.

Macro Definition Documentation

◆ VMW_PORT

#define VMW_PORT 0x5658

VMware backdoor I/O port.

Definition at line 15 of file vmware.h.

◆ VMW_MAGIC

#define VMW_MAGIC 0x564d5868 /* "VMXh" */

VMware backdoor magic value.

Definition at line 18 of file vmware.h.

◆ VMW_BACKDOOR

#define VMW_BACKDOOR "inl %%dx, %%eax"

VMware backdoor magic instruction.

Definition at line 21 of file vmware.h.

◆ VMW_CMD_GET_VERSION

#define VMW_CMD_GET_VERSION 0x0a

Get VMware version.

Definition at line 24 of file vmware.h.

◆ VMW_CMD_GUESTRPC

#define VMW_CMD_GUESTRPC 0x1e

Issue GuestRPC command.

Definition at line 27 of file vmware.h.

Function Documentation

◆ FILE_LICENCE()

FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )

◆ attribute()

static __attribute__ ( (always_inline) )

inlinestatic

Get VMware version.

Issue GuestRPC command.

Return values

version	VMware version(?)
magic	VMware magic number, if present
product_type	VMware product type

Parameters

channel	Channel number
subcommand	GuestRPC subcommand
parameter	Subcommand-specific parameter

Return values

edxhi	Subcommand-specific result
ebx	Subcommand-specific result
status	Command status

◆ volatile()

__asm__ __volatile__ ( )

◆ vmware_present()

int vmware_present ( void )

Detect VMware presence.

Return values

rc	Return status code

Definition at line 45 of file vmware.c.

                             {
         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;
 }