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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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89da76fde6
This patch adds capabilities for a VMWare guest to send and receive messages from the host, and adds functions to sending log messages to vmware.log and to request device settings that aren't available through the virtual hardware, e.g. certain settings in the VMX file. Signed-off-by: Sinclair Yeh <syeh@vmware.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
192 lines
4.7 KiB
C
192 lines
4.7 KiB
C
/*
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* Copyright (C) 2016, VMware, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) 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, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* Based on code from vmware.c and vmmouse.c.
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* Author:
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* Sinclair Yeh <syeh@vmware.com>
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*/
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#ifndef _VMWGFX_MSG_H
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#define _VMWGFX_MSG_H
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/**
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* Hypervisor-specific bi-directional communication channel. Should never
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* execute on bare metal hardware. The caller must make sure to check for
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* supported hypervisor before using these macros.
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*
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* The last two parameters are both input and output and must be initialized.
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*
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* @cmd: [IN] Message Cmd
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* @in_ebx: [IN] Message Len, through EBX
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* @in_si: [IN] Input argument through SI, set to 0 if not used
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* @in_di: [IN] Input argument through DI, set ot 0 if not used
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* @port_num: [IN] port number + [channel id]
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* @magic: [IN] hypervisor magic value
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* @eax: [OUT] value of EAX register
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* @ebx: [OUT] e.g. status from an HB message status command
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* @ecx: [OUT] e.g. status from a non-HB message status command
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* @edx: [OUT] e.g. channel id
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* @si: [OUT]
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* @di: [OUT]
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*/
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#define VMW_PORT(cmd, in_ebx, in_si, in_di, \
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port_num, magic, \
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eax, ebx, ecx, edx, si, di) \
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({ \
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asm volatile ("inl %%dx, %%eax;" : \
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"=a"(eax), \
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"=b"(ebx), \
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"=c"(ecx), \
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"=d"(edx), \
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"=S"(si), \
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"=D"(di) : \
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"a"(magic), \
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"b"(in_ebx), \
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"c"(cmd), \
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"d"(port_num), \
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"S"(in_si), \
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"D"(in_di) : \
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"memory"); \
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})
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/**
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* Hypervisor-specific bi-directional communication channel. Should never
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* execute on bare metal hardware. The caller must make sure to check for
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* supported hypervisor before using these macros.
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*
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* The last 3 parameters are both input and output and must be initialized.
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*
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* @cmd: [IN] Message Cmd
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* @in_ecx: [IN] Message Len, through ECX
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* @in_si: [IN] Input argument through SI, set to 0 if not used
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* @in_di: [IN] Input argument through DI, set to 0 if not used
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* @port_num: [IN] port number + [channel id]
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* @magic: [IN] hypervisor magic value
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* @bp: [IN]
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* @eax: [OUT] value of EAX register
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* @ebx: [OUT] e.g. status from an HB message status command
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* @ecx: [OUT] e.g. status from a non-HB message status command
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* @edx: [OUT] e.g. channel id
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* @si: [OUT]
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* @di: [OUT]
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*/
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#ifdef __x86_64__
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#define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, \
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port_num, magic, bp, \
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eax, ebx, ecx, edx, si, di) \
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({ \
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asm volatile ("push %%rbp;" \
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"mov %12, %%rbp;" \
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"rep outsb;" \
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"pop %%rbp;" : \
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"=a"(eax), \
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"=b"(ebx), \
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"=c"(ecx), \
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"=d"(edx), \
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"=S"(si), \
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"=D"(di) : \
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"a"(magic), \
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"b"(cmd), \
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"c"(in_ecx), \
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"d"(port_num), \
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"S"(in_si), \
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"D"(in_di), \
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"r"(bp) : \
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"memory", "cc"); \
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})
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#define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, \
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port_num, magic, bp, \
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eax, ebx, ecx, edx, si, di) \
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({ \
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asm volatile ("push %%rbp;" \
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"mov %12, %%rbp;" \
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"rep insb;" \
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"pop %%rbp" : \
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"=a"(eax), \
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"=b"(ebx), \
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"=c"(ecx), \
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"=d"(edx), \
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"=S"(si), \
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"=D"(di) : \
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"a"(magic), \
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"b"(cmd), \
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"c"(in_ecx), \
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"d"(port_num), \
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"S"(in_si), \
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"D"(in_di), \
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"r"(bp) : \
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"memory", "cc"); \
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})
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#else
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/* In the 32-bit version of this macro, we use "m" because there is no
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* more register left for bp
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*/
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#define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, \
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port_num, magic, bp, \
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eax, ebx, ecx, edx, si, di) \
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({ \
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asm volatile ("push %%ebp;" \
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"mov %12, %%ebp;" \
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"rep outsb;" \
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"pop %%ebp;" : \
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"=a"(eax), \
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"=b"(ebx), \
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"=c"(ecx), \
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"=d"(edx), \
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"=S"(si), \
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"=D"(di) : \
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"a"(magic), \
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"b"(cmd), \
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"c"(in_ecx), \
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"d"(port_num), \
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"S"(in_si), \
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"D"(in_di), \
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"m"(bp) : \
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"memory", "cc"); \
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})
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#define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, \
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port_num, magic, bp, \
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eax, ebx, ecx, edx, si, di) \
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({ \
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asm volatile ("push %%ebp;" \
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"mov %12, %%ebp;" \
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"rep insb;" \
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"pop %%ebp" : \
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"=a"(eax), \
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"=b"(ebx), \
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"=c"(ecx), \
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"=d"(edx), \
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"=S"(si), \
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"=D"(di) : \
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"a"(magic), \
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"b"(cmd), \
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"c"(in_ecx), \
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"d"(port_num), \
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"S"(in_si), \
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"D"(in_di), \
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"m"(bp) : \
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"memory", "cc"); \
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})
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#endif /* #if __x86_64__ */
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#endif
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