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0001 /* SPDX-License-Identifier: GPL-2.0+ OR MIT */ 0002 /************************************************************************** 0003 * 0004 * Copyright 2016-2021 VMware, Inc., Palo Alto, CA., USA 0005 * 0006 * Permission is hereby granted, free of charge, to any person obtaining a 0007 * copy of this software and associated documentation files (the 0008 * "Software"), to deal in the Software without restriction, including 0009 * without limitation the rights to use, copy, modify, merge, publish, 0010 * distribute, sub license, and/or sell copies of the Software, and to 0011 * permit persons to whom the Software is furnished to do so, subject to 0012 * the following conditions: 0013 * 0014 * The above copyright notice and this permission notice (including the 0015 * next paragraph) shall be included in all copies or substantial portions 0016 * of the Software. 0017 * 0018 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 0019 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 0020 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 0021 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 0022 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 0023 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 0024 * USE OR OTHER DEALINGS IN THE SOFTWARE. 0025 * 0026 ************************************************************************** 0027 * 0028 * Based on code from vmware.c and vmmouse.c. 0029 * Author: 0030 * Sinclair Yeh <syeh@vmware.com> 0031 */ 0032 #ifndef _VMWGFX_MSG_X86_H 0033 #define _VMWGFX_MSG_X86_H 0034 0035 0036 #if defined(__i386__) || defined(__x86_64__) 0037 0038 #include <asm/vmware.h> 0039 0040 /** 0041 * Hypervisor-specific bi-directional communication channel. Should never 0042 * execute on bare metal hardware. The caller must make sure to check for 0043 * supported hypervisor before using these macros. 0044 * 0045 * The last two parameters are both input and output and must be initialized. 0046 * 0047 * @cmd: [IN] Message Cmd 0048 * @in_ebx: [IN] Message Len, through EBX 0049 * @in_si: [IN] Input argument through SI, set to 0 if not used 0050 * @in_di: [IN] Input argument through DI, set ot 0 if not used 0051 * @flags: [IN] hypercall flags + [channel id] 0052 * @magic: [IN] hypervisor magic value 0053 * @eax: [OUT] value of EAX register 0054 * @ebx: [OUT] e.g. status from an HB message status command 0055 * @ecx: [OUT] e.g. status from a non-HB message status command 0056 * @edx: [OUT] e.g. channel id 0057 * @si: [OUT] 0058 * @di: [OUT] 0059 */ 0060 #define VMW_PORT(cmd, in_ebx, in_si, in_di, \ 0061 flags, magic, \ 0062 eax, ebx, ecx, edx, si, di) \ 0063 ({ \ 0064 asm volatile (VMWARE_HYPERCALL : \ 0065 "=a"(eax), \ 0066 "=b"(ebx), \ 0067 "=c"(ecx), \ 0068 "=d"(edx), \ 0069 "=S"(si), \ 0070 "=D"(di) : \ 0071 "a"(magic), \ 0072 "b"(in_ebx), \ 0073 "c"(cmd), \ 0074 "d"(flags), \ 0075 "S"(in_si), \ 0076 "D"(in_di) : \ 0077 "memory"); \ 0078 }) 0079 0080 0081 /** 0082 * Hypervisor-specific bi-directional communication channel. Should never 0083 * execute on bare metal hardware. The caller must make sure to check for 0084 * supported hypervisor before using these macros. 0085 * 0086 * The last 3 parameters are both input and output and must be initialized. 0087 * 0088 * @cmd: [IN] Message Cmd 0089 * @in_ecx: [IN] Message Len, through ECX 0090 * @in_si: [IN] Input argument through SI, set to 0 if not used 0091 * @in_di: [IN] Input argument through DI, set to 0 if not used 0092 * @flags: [IN] hypercall flags + [channel id] 0093 * @magic: [IN] hypervisor magic value 0094 * @bp: [IN] 0095 * @eax: [OUT] value of EAX register 0096 * @ebx: [OUT] e.g. status from an HB message status command 0097 * @ecx: [OUT] e.g. status from a non-HB message status command 0098 * @edx: [OUT] e.g. channel id 0099 * @si: [OUT] 0100 * @di: [OUT] 0101 */ 0102 #ifdef __x86_64__ 0103 0104 #define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, \ 0105 flags, magic, bp, \ 0106 eax, ebx, ecx, edx, si, di) \ 0107 ({ \ 0108 asm volatile ("push %%rbp;" \ 0109 "mov %12, %%rbp;" \ 0110 VMWARE_HYPERCALL_HB_OUT \ 0111 "pop %%rbp;" : \ 0112 "=a"(eax), \ 0113 "=b"(ebx), \ 0114 "=c"(ecx), \ 0115 "=d"(edx), \ 0116 "=S"(si), \ 0117 "=D"(di) : \ 0118 "a"(magic), \ 0119 "b"(cmd), \ 0120 "c"(in_ecx), \ 0121 "d"(flags), \ 0122 "S"(in_si), \ 0123 "D"(in_di), \ 0124 "r"(bp) : \ 0125 "memory", "cc"); \ 0126 }) 0127 0128 0129 #define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, \ 0130 flags, magic, bp, \ 0131 eax, ebx, ecx, edx, si, di) \ 0132 ({ \ 0133 asm volatile ("push %%rbp;" \ 0134 "mov %12, %%rbp;" \ 0135 VMWARE_HYPERCALL_HB_IN \ 0136 "pop %%rbp" : \ 0137 "=a"(eax), \ 0138 "=b"(ebx), \ 0139 "=c"(ecx), \ 0140 "=d"(edx), \ 0141 "=S"(si), \ 0142 "=D"(di) : \ 0143 "a"(magic), \ 0144 "b"(cmd), \ 0145 "c"(in_ecx), \ 0146 "d"(flags), \ 0147 "S"(in_si), \ 0148 "D"(in_di), \ 0149 "r"(bp) : \ 0150 "memory", "cc"); \ 0151 }) 0152 0153 #elif defined(__i386__) 0154 0155 /* 0156 * In the 32-bit version of this macro, we store bp in a memory location 0157 * because we've ran out of registers. 0158 * Now we can't reference that memory location while we've modified 0159 * %esp or %ebp, so we first push it on the stack, just before we push 0160 * %ebp, and then when we need it we read it from the stack where we 0161 * just pushed it. 0162 */ 0163 #define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, \ 0164 flags, magic, bp, \ 0165 eax, ebx, ecx, edx, si, di) \ 0166 ({ \ 0167 asm volatile ("push %12;" \ 0168 "push %%ebp;" \ 0169 "mov 0x04(%%esp), %%ebp;" \ 0170 VMWARE_HYPERCALL_HB_OUT \ 0171 "pop %%ebp;" \ 0172 "add $0x04, %%esp;" : \ 0173 "=a"(eax), \ 0174 "=b"(ebx), \ 0175 "=c"(ecx), \ 0176 "=d"(edx), \ 0177 "=S"(si), \ 0178 "=D"(di) : \ 0179 "a"(magic), \ 0180 "b"(cmd), \ 0181 "c"(in_ecx), \ 0182 "d"(flags), \ 0183 "S"(in_si), \ 0184 "D"(in_di), \ 0185 "m"(bp) : \ 0186 "memory", "cc"); \ 0187 }) 0188 0189 0190 #define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, \ 0191 flags, magic, bp, \ 0192 eax, ebx, ecx, edx, si, di) \ 0193 ({ \ 0194 asm volatile ("push %12;" \ 0195 "push %%ebp;" \ 0196 "mov 0x04(%%esp), %%ebp;" \ 0197 VMWARE_HYPERCALL_HB_IN \ 0198 "pop %%ebp;" \ 0199 "add $0x04, %%esp;" : \ 0200 "=a"(eax), \ 0201 "=b"(ebx), \ 0202 "=c"(ecx), \ 0203 "=d"(edx), \ 0204 "=S"(si), \ 0205 "=D"(di) : \ 0206 "a"(magic), \ 0207 "b"(cmd), \ 0208 "c"(in_ecx), \ 0209 "d"(flags), \ 0210 "S"(in_si), \ 0211 "D"(in_di), \ 0212 "m"(bp) : \ 0213 "memory", "cc"); \ 0214 }) 0215 #endif /* defined(__i386__) */ 0216 0217 #endif /* defined(__i386__) || defined(__x86_64__) */ 0218 0219 #endif /* _VMWGFX_MSG_X86_H */
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