mirror of https://github.com/ipxe/ipxe.git
[vmware] Add GuestRPC mechanism
Use the VMware backdoor I/O port to access the GuestRPC mechanism. Signed-off-by: Michael Brown <mcb30@ipxe.org>pull/6/head
Michael Brown
parent
851b93fbc3
commit
3a5823a126
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@ -85,6 +85,7 @@ SRCDIRS += arch/i386/interface/pcbios
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SRCDIRS += arch/i386/interface/pxe
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SRCDIRS += arch/i386/interface/pxeparent
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SRCDIRS += arch/i386/interface/syslinux
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SRCDIRS += arch/i386/interface/vmware
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SRCDIRS += arch/i386/hci/commands
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# The various xxx_loader.c files are #included into core/loader.c and
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@ -16,6 +16,8 @@ FILE_LICENCE ( GPL2_OR_LATER );
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#define ERRFILE_int13 ( ERRFILE_ARCH | ERRFILE_CORE | 0x00050000 )
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#define ERRFILE_pxeparent ( ERRFILE_ARCH | ERRFILE_CORE | 0x00060000 )
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#define ERRFILE_runtime ( ERRFILE_ARCH | ERRFILE_CORE | 0x00070000 )
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#define ERRFILE_vmware ( ERRFILE_ARCH | ERRFILE_CORE | 0x00080000 )
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#define ERRFILE_guestrpc ( ERRFILE_ARCH | ERRFILE_CORE | 0x00090000 )
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#define ERRFILE_bootsector ( ERRFILE_ARCH | ERRFILE_IMAGE | 0x00000000 )
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#define ERRFILE_bzimage ( ERRFILE_ARCH | ERRFILE_IMAGE | 0x00010000 )
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@ -0,0 +1,68 @@
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#ifndef _IPXE_GUESTRPC_H
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#define _IPXE_GUESTRPC_H
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/** @file
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*
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* VMware GuestRPC mechanism
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*
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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#include <stdint.h>
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#include <ipxe/vmware.h>
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/** GuestRPC magic number */
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#define GUESTRPC_MAGIC 0x49435052 /* "RPCI" */
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/** Open RPC channel */
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#define GUESTRPC_OPEN 0x00
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/** Open RPC channel success status */
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#define GUESTRPC_OPEN_SUCCESS 0x00010000
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/** Send RPC command length */
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#define GUESTRPC_COMMAND_LEN 0x01
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/** Send RPC command length success status */
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#define GUESTRPC_COMMAND_LEN_SUCCESS 0x00810000
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/** Send RPC command data */
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#define GUESTRPC_COMMAND_DATA 0x02
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/** Send RPC command data success status */
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#define GUESTRPC_COMMAND_DATA_SUCCESS 0x00010000
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/** Receive RPC reply length */
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#define GUESTRPC_REPLY_LEN 0x03
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/** Receive RPC reply length success status */
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#define GUESTRPC_REPLY_LEN_SUCCESS 0x00830000
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/** Receive RPC reply data */
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#define GUESTRPC_REPLY_DATA 0x04
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/** Receive RPC reply data success status */
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#define GUESTRPC_REPLY_DATA_SUCCESS 0x00010000
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/** Finish receiving RPC reply */
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#define GUESTRPC_REPLY_FINISH 0x05
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/** Finish receiving RPC reply success status */
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#define GUESTRPC_REPLY_FINISH_SUCCESS 0x00010000
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/** Close RPC channel */
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#define GUESTRPC_CLOSE 0x06
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/** Close RPC channel success status */
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#define GUESTRPC_CLOSE_SUCCESS 0x00010000
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/** RPC command success status */
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#define GUESTRPC_SUCCESS 0x2031 /* "1 " */
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extern int guestrpc_open ( void );
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extern void guestrpc_close ( int channel );
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extern int guestrpc_command ( int channel, const char *command, char *reply,
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size_t reply_len );
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#endif /* _IPXE_GUESTRPC_H */
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@ -0,0 +1,81 @@
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#ifndef _IPXE_VMWARE_H
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#define _IPXE_VMWARE_H
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/** @file
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*
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* VMware backdoor mechanism
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*
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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#include <stdint.h>
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/** VMware backdoor I/O port */
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#define VMW_PORT 0x5658
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/** VMware backdoor magic value */
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#define VMW_MAGIC 0x564d5868 /* "VMXh" */
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/** VMware backdoor magic instruction */
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#define VMW_BACKDOOR "inl %%dx, %%eax"
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/** Get VMware version */
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#define VMW_CMD_GET_VERSION 0x0a
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/** Issue GuestRPC command */
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#define VMW_CMD_GUESTRPC 0x1e
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/**
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* Get VMware version
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*
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* @ret version VMware version(?)
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* @ret magic VMware magic number, if present
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* @ret product_type VMware product type
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*/
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static inline __attribute__ (( always_inline )) void
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vmware_cmd_get_version ( uint32_t *version, uint32_t *magic,
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uint32_t *product_type ) {
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uint32_t discard_d;
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/* Perform backdoor call */
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__asm__ __volatile__ ( VMW_BACKDOOR
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: "=a" ( *version ), "=b" ( *magic ),
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"=c" ( *product_type ), "=d" ( discard_d )
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: "0" ( VMW_MAGIC ), "1" ( 0 ),
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"2" ( VMW_CMD_GET_VERSION ),
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"3" ( VMW_PORT ) );
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}
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/**
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* Issue GuestRPC command
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*
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* @v channel Channel number
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* @v subcommand GuestRPC subcommand
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* @v parameter Subcommand-specific parameter
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* @ret edxhi Subcommand-specific result
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* @ret ebx Subcommand-specific result
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* @ret status Command status
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*/
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static inline __attribute__ (( always_inline )) uint32_t
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vmware_cmd_guestrpc ( int channel, uint16_t subcommand, uint32_t parameter,
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uint16_t *edxhi, uint32_t *ebx ) {
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uint32_t discard_a;
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uint32_t status;
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uint32_t edx;
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/* Perform backdoor call */
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__asm__ __volatile__ ( VMW_BACKDOOR
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: "=a" ( discard_a ), "=b" ( *ebx ),
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"=c" ( status ), "=d" ( edx )
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: "0" ( VMW_MAGIC ), "1" ( parameter ),
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"2" ( VMW_CMD_GUESTRPC | ( subcommand << 16 )),
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"3" ( VMW_PORT | ( channel << 16 ) ) );
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*edxhi = ( edx >> 16 );
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return status;
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}
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extern int vmware_present ( void );
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#endif /* _IPXE_VMWARE_H */
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@ -0,0 +1,326 @@
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/*
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* Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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/** @file
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*
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* VMware GuestRPC mechanism
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*
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*/
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#include <stdint.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include <ipxe/vmware.h>
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#include <ipxe/guestrpc.h>
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/* Disambiguate the various error causes */
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#define EPROTO_OPEN __einfo_error ( EINFO_EPROTO_OPEN )
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#define EINFO_EPROTO_OPEN \
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__einfo_uniqify ( EINFO_EPROTO, 0x00, "GuestRPC open failed" )
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#define EPROTO_COMMAND_LEN __einfo_error ( EINFO_EPROTO_COMMAND_LEN )
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#define EINFO_EPROTO_COMMAND_LEN \
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__einfo_uniqify ( EINFO_EPROTO, 0x01, "GuestRPC command length failed" )
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#define EPROTO_COMMAND_DATA __einfo_error ( EINFO_EPROTO_COMMAND_DATA )
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#define EINFO_EPROTO_COMMAND_DATA \
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__einfo_uniqify ( EINFO_EPROTO, 0x02, "GuestRPC command data failed" )
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#define EPROTO_REPLY_LEN __einfo_error ( EINFO_EPROTO_REPLY_LEN )
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#define EINFO_EPROTO_REPLY_LEN \
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__einfo_uniqify ( EINFO_EPROTO, 0x03, "GuestRPC reply length failed" )
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#define EPROTO_REPLY_DATA __einfo_error ( EINFO_EPROTO_REPLY_DATA )
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#define EINFO_EPROTO_REPLY_DATA \
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__einfo_uniqify ( EINFO_EPROTO, 0x04, "GuestRPC reply data failed" )
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#define EPROTO_REPLY_FINISH __einfo_error ( EINFO_EPROTO_REPLY_FINISH )
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#define EINFO_EPROTO_REPLY_FINISH \
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__einfo_uniqify ( EINFO_EPROTO, 0x05, "GuestRPC reply finish failed" )
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#define EPROTO_CLOSE __einfo_error ( EINFO_EPROTO_CLOSE )
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#define EINFO_EPROTO_CLOSE \
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__einfo_uniqify ( EINFO_EPROTO, 0x06, "GuestRPC close failed" )
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/**
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* Open GuestRPC channel
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*
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* @ret channel Channel number, or negative error
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*/
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int guestrpc_open ( void ) {
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uint16_t channel;
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uint32_t discard_b;
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uint32_t status;
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/* Issue GuestRPC command */
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status = vmware_cmd_guestrpc ( 0, GUESTRPC_OPEN, GUESTRPC_MAGIC,
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&channel, &discard_b );
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if ( status != GUESTRPC_OPEN_SUCCESS ) {
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DBGC ( GUESTRPC_MAGIC, "GuestRPC open failed: status %08x\n",
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status );
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return -EPROTO_OPEN;
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}
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DBGC ( GUESTRPC_MAGIC, "GuestRPC channel %d opened\n", channel );
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return channel;
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}
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/**
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* Send GuestRPC command length
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*
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* @v channel Channel number
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* @v len Command length
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* @ret rc Return status code
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*/
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static int guestrpc_command_len ( int channel, size_t len ) {
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uint16_t discard_d;
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uint32_t discard_b;
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uint32_t status;
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/* Issue GuestRPC command */
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status = vmware_cmd_guestrpc ( channel, GUESTRPC_COMMAND_LEN, len,
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&discard_d, &discard_b );
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if ( status != GUESTRPC_COMMAND_LEN_SUCCESS ) {
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DBGC ( GUESTRPC_MAGIC, "GuestRPC channel %d send command "
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"length %zd failed: status %08x\n",
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channel, len, status );
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return -EPROTO_COMMAND_LEN;
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}
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return 0;
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}
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/**
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* Send GuestRPC command data
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*
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* @v channel Channel number
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* @v data Command data
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* @ret rc Return status code
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*/
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static int guestrpc_command_data ( int channel, uint32_t data ) {
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uint16_t discard_d;
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uint32_t discard_b;
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uint32_t status;
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/* Issue GuestRPC command */
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status = vmware_cmd_guestrpc ( channel, GUESTRPC_COMMAND_DATA, data,
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&discard_d, &discard_b );
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if ( status != GUESTRPC_COMMAND_DATA_SUCCESS ) {
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DBGC ( GUESTRPC_MAGIC, "GuestRPC channel %d send command "
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"data %08x failed: status %08x\n",
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channel, data, status );
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return -EPROTO_COMMAND_DATA;
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}
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return 0;
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}
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/**
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* Receive GuestRPC reply length
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*
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* @v channel Channel number
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* @ret reply_id Reply ID
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* @ret len Reply length, or negative error
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*/
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static int guestrpc_reply_len ( int channel, uint16_t *reply_id ) {
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uint32_t len;
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uint32_t status;
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/* Issue GuestRPC command */
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status = vmware_cmd_guestrpc ( channel, GUESTRPC_REPLY_LEN, 0,
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reply_id, &len );
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if ( status != GUESTRPC_REPLY_LEN_SUCCESS ) {
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DBGC ( GUESTRPC_MAGIC, "GuestRPC channel %d receive reply "
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"length failed: status %08x\n", channel, status );
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return -EPROTO_REPLY_LEN;
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}
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return len;
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}
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/**
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* Receive GuestRPC reply data
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*
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* @v channel Channel number
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* @v reply_id Reply ID
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* @ret data Reply data
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* @ret rc Return status code
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*/
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static int guestrpc_reply_data ( int channel, uint16_t reply_id,
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uint32_t *data ) {
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uint16_t discard_d;
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uint32_t status;
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/* Issue GuestRPC command */
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status = vmware_cmd_guestrpc ( channel, GUESTRPC_REPLY_DATA, reply_id,
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&discard_d, data );
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if ( status != GUESTRPC_REPLY_DATA_SUCCESS ) {
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DBGC ( GUESTRPC_MAGIC, "GuestRPC channel %d receive reply "
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"%d data failed: status %08x\n",
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channel, reply_id, status );
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return -EPROTO_REPLY_DATA;
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}
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return 0;
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}
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/**
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* Finish receiving GuestRPC reply
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*
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* @v channel Channel number
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* @v reply_id Reply ID
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* @ret rc Return status code
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*/
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static int guestrpc_reply_finish ( int channel, uint16_t reply_id ) {
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uint16_t discard_d;
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uint32_t discard_b;
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uint32_t status;
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/* Issue GuestRPC command */
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status = vmware_cmd_guestrpc ( channel, GUESTRPC_REPLY_FINISH, reply_id,
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&discard_d, &discard_b );
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if ( status != GUESTRPC_REPLY_FINISH_SUCCESS ) {
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DBGC ( GUESTRPC_MAGIC, "GuestRPC channel %d finish reply %d "
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"failed: status %08x\n", channel, reply_id, status );
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return -EPROTO_REPLY_FINISH;
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}
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return 0;
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}
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/**
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* Close GuestRPC channel
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*
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* @v channel Channel number
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*/
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void guestrpc_close ( int channel ) {
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uint16_t discard_d;
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uint32_t discard_b;
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uint32_t status;
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/* Issue GuestRPC command */
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status = vmware_cmd_guestrpc ( channel, GUESTRPC_CLOSE, 0,
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&discard_d, &discard_b );
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if ( status != GUESTRPC_CLOSE_SUCCESS ) {
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DBGC ( GUESTRPC_MAGIC, "GuestRPC channel %d close failed: "
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"status %08x\n", channel, status );
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return;
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}
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DBGC ( GUESTRPC_MAGIC, "GuestRPC channel %d closed\n", channel );
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}
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/**
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* Issue GuestRPC command
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*
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* @v channel Channel number
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* @v command Command
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* @v reply Reply buffer
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* @v reply_len Length of reply buffer
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* @ret len Length of reply, or negative error
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*
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* The actual length of the reply will be returned even if the buffer
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* was too small.
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*/
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int guestrpc_command ( int channel, const char *command, char *reply,
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size_t reply_len ) {
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const uint8_t *command_bytes = ( ( const void * ) command );
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uint8_t *reply_bytes = ( ( void * ) reply );
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size_t command_len = strlen ( command );
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int orig_reply_len = reply_len;
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uint16_t status;
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uint8_t *status_bytes = ( ( void * ) &status );
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size_t status_len = sizeof ( status );
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uint32_t data;
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uint16_t reply_id;
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int len;
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int remaining;
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unsigned int i;
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int rc;
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DBGC2 ( GUESTRPC_MAGIC, "GuestRPC channel %d issuing command:\n",
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channel );
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DBGC2_HDA ( GUESTRPC_MAGIC, 0, command, command_len );
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/* Sanity check */
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assert ( ( reply != NULL ) || ( reply_len == 0 ) );
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/* Send command length */
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if ( ( rc = guestrpc_command_len ( channel, command_len ) ) < 0 )
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return rc;
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/* Send command data */
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while ( command_len ) {
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data = 0;
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for ( i = sizeof ( data ) ; i ; i-- ) {
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if ( command_len ) {
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data = ( ( data & ~0xff ) |
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*(command_bytes++) );
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command_len--;
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}
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data = ( ( data << 24 ) | ( data >> 8 ) );
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}
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if ( ( rc = guestrpc_command_data ( channel, data ) ) < 0 )
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return rc;
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}
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/* Receive reply length */
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if ( ( len = guestrpc_reply_len ( channel, &reply_id ) ) < 0 ) {
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rc = len;
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return rc;
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}
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/* Receive reply */
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for ( remaining = len ; remaining > 0 ; remaining -= sizeof ( data ) ) {
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if ( ( rc = guestrpc_reply_data ( channel, reply_id,
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&data ) ) < 0 ) {
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return rc;
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}
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for ( i = sizeof ( data ) ; i ; i-- ) {
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if ( status_len ) {
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*(status_bytes++) = ( data & 0xff );
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status_len--;
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} else if ( reply_len ) {
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*(reply_bytes++) = ( data & 0xff );
|
||||
reply_len--;
|
||||
}
|
||||
data = ( ( data << 24 ) | ( data >> 8 ) );
|
||||
}
|
||||
}
|
||||
|
||||
/* Finish receiving RPC reply */
|
||||
if ( ( rc = guestrpc_reply_finish ( channel, reply_id ) ) < 0 )
|
||||
return rc;
|
||||
|
||||
DBGC2 ( GUESTRPC_MAGIC, "GuestRPC channel %d received reply (id %d, "
|
||||
"length %d):\n", channel, reply_id, len );
|
||||
DBGC2_HDA ( GUESTRPC_MAGIC, 0, &status, sizeof ( status ) );
|
||||
DBGC2_HDA ( GUESTRPC_MAGIC, sizeof ( status ), reply,
|
||||
( ( len < orig_reply_len ) ? len : orig_reply_len ) );
|
||||
|
||||
/* Check reply status */
|
||||
if ( status != GUESTRPC_SUCCESS ) {
|
||||
DBGC ( GUESTRPC_MAGIC, "GuestRPC channel %d command failed "
|
||||
"(status %04x, reply id %d, reply length %d):\n",
|
||||
channel, status, reply_id, len );
|
||||
DBGC_HDA ( GUESTRPC_MAGIC, 0, command, command_len );
|
||||
DBGC_HDA ( GUESTRPC_MAGIC, 0, &status, sizeof ( status ) );
|
||||
DBGC_HDA ( GUESTRPC_MAGIC, sizeof ( status ), reply,
|
||||
( ( len < orig_reply_len ) ? len : orig_reply_len ));
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
return len;
|
||||
}
|
||||
|
|
@ -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;
|
||||
}
|
||||
Loading…
Reference in New Issue