forked from mirrors/linux
dff9688886
This is dual licensed under GPL-2.0 or MIT. vmwgfx_msg.h is the odd one out that is GPL-2.0+ or MIT. Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Dirk Hohndel (VMware) <dirk@hohndel.org> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180506231626.115996-9-dirk@hohndel.org
213 lines
5.9 KiB
C
213 lines
5.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ OR MIT */
|
|
/**************************************************************************
|
|
*
|
|
* Copyright 2016 VMware, Inc., Palo Alto, CA., USA
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sub license, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the
|
|
* next paragraph) shall be included in all copies or substantial portions
|
|
* of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
|
|
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
|
|
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
|
|
* USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
**************************************************************************
|
|
*
|
|
* Based on code from vmware.c and vmmouse.c.
|
|
* Author:
|
|
* Sinclair Yeh <syeh@vmware.com>
|
|
*/
|
|
#ifndef _VMWGFX_MSG_H
|
|
#define _VMWGFX_MSG_H
|
|
|
|
|
|
/**
|
|
* Hypervisor-specific bi-directional communication channel. Should never
|
|
* execute on bare metal hardware. The caller must make sure to check for
|
|
* supported hypervisor before using these macros.
|
|
*
|
|
* The last two parameters are both input and output and must be initialized.
|
|
*
|
|
* @cmd: [IN] Message Cmd
|
|
* @in_ebx: [IN] Message Len, through EBX
|
|
* @in_si: [IN] Input argument through SI, set to 0 if not used
|
|
* @in_di: [IN] Input argument through DI, set ot 0 if not used
|
|
* @port_num: [IN] port number + [channel id]
|
|
* @magic: [IN] hypervisor magic value
|
|
* @eax: [OUT] value of EAX register
|
|
* @ebx: [OUT] e.g. status from an HB message status command
|
|
* @ecx: [OUT] e.g. status from a non-HB message status command
|
|
* @edx: [OUT] e.g. channel id
|
|
* @si: [OUT]
|
|
* @di: [OUT]
|
|
*/
|
|
#define VMW_PORT(cmd, in_ebx, in_si, in_di, \
|
|
port_num, magic, \
|
|
eax, ebx, ecx, edx, si, di) \
|
|
({ \
|
|
asm volatile ("inl %%dx, %%eax;" : \
|
|
"=a"(eax), \
|
|
"=b"(ebx), \
|
|
"=c"(ecx), \
|
|
"=d"(edx), \
|
|
"=S"(si), \
|
|
"=D"(di) : \
|
|
"a"(magic), \
|
|
"b"(in_ebx), \
|
|
"c"(cmd), \
|
|
"d"(port_num), \
|
|
"S"(in_si), \
|
|
"D"(in_di) : \
|
|
"memory"); \
|
|
})
|
|
|
|
|
|
/**
|
|
* Hypervisor-specific bi-directional communication channel. Should never
|
|
* execute on bare metal hardware. The caller must make sure to check for
|
|
* supported hypervisor before using these macros.
|
|
*
|
|
* The last 3 parameters are both input and output and must be initialized.
|
|
*
|
|
* @cmd: [IN] Message Cmd
|
|
* @in_ecx: [IN] Message Len, through ECX
|
|
* @in_si: [IN] Input argument through SI, set to 0 if not used
|
|
* @in_di: [IN] Input argument through DI, set to 0 if not used
|
|
* @port_num: [IN] port number + [channel id]
|
|
* @magic: [IN] hypervisor magic value
|
|
* @bp: [IN]
|
|
* @eax: [OUT] value of EAX register
|
|
* @ebx: [OUT] e.g. status from an HB message status command
|
|
* @ecx: [OUT] e.g. status from a non-HB message status command
|
|
* @edx: [OUT] e.g. channel id
|
|
* @si: [OUT]
|
|
* @di: [OUT]
|
|
*/
|
|
#ifdef __x86_64__
|
|
|
|
#define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, \
|
|
port_num, magic, bp, \
|
|
eax, ebx, ecx, edx, si, di) \
|
|
({ \
|
|
asm volatile ("push %%rbp;" \
|
|
"mov %12, %%rbp;" \
|
|
"rep outsb;" \
|
|
"pop %%rbp;" : \
|
|
"=a"(eax), \
|
|
"=b"(ebx), \
|
|
"=c"(ecx), \
|
|
"=d"(edx), \
|
|
"=S"(si), \
|
|
"=D"(di) : \
|
|
"a"(magic), \
|
|
"b"(cmd), \
|
|
"c"(in_ecx), \
|
|
"d"(port_num), \
|
|
"S"(in_si), \
|
|
"D"(in_di), \
|
|
"r"(bp) : \
|
|
"memory", "cc"); \
|
|
})
|
|
|
|
|
|
#define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, \
|
|
port_num, magic, bp, \
|
|
eax, ebx, ecx, edx, si, di) \
|
|
({ \
|
|
asm volatile ("push %%rbp;" \
|
|
"mov %12, %%rbp;" \
|
|
"rep insb;" \
|
|
"pop %%rbp" : \
|
|
"=a"(eax), \
|
|
"=b"(ebx), \
|
|
"=c"(ecx), \
|
|
"=d"(edx), \
|
|
"=S"(si), \
|
|
"=D"(di) : \
|
|
"a"(magic), \
|
|
"b"(cmd), \
|
|
"c"(in_ecx), \
|
|
"d"(port_num), \
|
|
"S"(in_si), \
|
|
"D"(in_di), \
|
|
"r"(bp) : \
|
|
"memory", "cc"); \
|
|
})
|
|
|
|
#else
|
|
|
|
/*
|
|
* In the 32-bit version of this macro, we store bp in a memory location
|
|
* because we've ran out of registers.
|
|
* Now we can't reference that memory location while we've modified
|
|
* %esp or %ebp, so we first push it on the stack, just before we push
|
|
* %ebp, and then when we need it we read it from the stack where we
|
|
* just pushed it.
|
|
*/
|
|
#define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, \
|
|
port_num, magic, bp, \
|
|
eax, ebx, ecx, edx, si, di) \
|
|
({ \
|
|
asm volatile ("push %12;" \
|
|
"push %%ebp;" \
|
|
"mov 0x04(%%esp), %%ebp;" \
|
|
"rep outsb;" \
|
|
"pop %%ebp;" \
|
|
"add $0x04, %%esp;" : \
|
|
"=a"(eax), \
|
|
"=b"(ebx), \
|
|
"=c"(ecx), \
|
|
"=d"(edx), \
|
|
"=S"(si), \
|
|
"=D"(di) : \
|
|
"a"(magic), \
|
|
"b"(cmd), \
|
|
"c"(in_ecx), \
|
|
"d"(port_num), \
|
|
"S"(in_si), \
|
|
"D"(in_di), \
|
|
"m"(bp) : \
|
|
"memory", "cc"); \
|
|
})
|
|
|
|
|
|
#define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, \
|
|
port_num, magic, bp, \
|
|
eax, ebx, ecx, edx, si, di) \
|
|
({ \
|
|
asm volatile ("push %12;" \
|
|
"push %%ebp;" \
|
|
"mov 0x04(%%esp), %%ebp;" \
|
|
"rep insb;" \
|
|
"pop %%ebp;" \
|
|
"add $0x04, %%esp;" : \
|
|
"=a"(eax), \
|
|
"=b"(ebx), \
|
|
"=c"(ecx), \
|
|
"=d"(edx), \
|
|
"=S"(si), \
|
|
"=D"(di) : \
|
|
"a"(magic), \
|
|
"b"(cmd), \
|
|
"c"(in_ecx), \
|
|
"d"(port_num), \
|
|
"S"(in_si), \
|
|
"D"(in_di), \
|
|
"m"(bp) : \
|
|
"memory", "cc"); \
|
|
})
|
|
#endif /* #if __x86_64__ */
|
|
|
|
#endif
|