vmwgfx_msg.h revision 1.2
1 /* $NetBSD: vmwgfx_msg.h,v 1.2 2021/12/18 23:45:45 riastradh Exp $ */ 2 3 /* SPDX-License-Identifier: GPL-2.0+ OR MIT */ 4 /************************************************************************** 5 * 6 * Copyright 2016 VMware, Inc., Palo Alto, CA., USA 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining a 9 * copy of this software and associated documentation files (the 10 * "Software"), to deal in the Software without restriction, including 11 * without limitation the rights to use, copy, modify, merge, publish, 12 * distribute, sub license, and/or sell copies of the Software, and to 13 * permit persons to whom the Software is furnished to do so, subject to 14 * the following conditions: 15 * 16 * The above copyright notice and this permission notice (including the 17 * next paragraph) shall be included in all copies or substantial portions 18 * of the Software. 19 * 20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 23 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 24 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 25 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 26 * USE OR OTHER DEALINGS IN THE SOFTWARE. 27 * 28 ************************************************************************** 29 * 30 * Based on code from vmware.c and vmmouse.c. 31 * Author: 32 * Sinclair Yeh <syeh (at) vmware.com> 33 */ 34 #ifndef _VMWGFX_MSG_H 35 #define _VMWGFX_MSG_H 36 37 #include <asm/vmware.h> 38 39 /** 40 * Hypervisor-specific bi-directional communication channel. Should never 41 * execute on bare metal hardware. The caller must make sure to check for 42 * supported hypervisor before using these macros. 43 * 44 * The last two parameters are both input and output and must be initialized. 45 * 46 * @cmd: [IN] Message Cmd 47 * @in_ebx: [IN] Message Len, through EBX 48 * @in_si: [IN] Input argument through SI, set to 0 if not used 49 * @in_di: [IN] Input argument through DI, set ot 0 if not used 50 * @flags: [IN] hypercall flags + [channel id] 51 * @magic: [IN] hypervisor magic value 52 * @eax: [OUT] value of EAX register 53 * @ebx: [OUT] e.g. status from an HB message status command 54 * @ecx: [OUT] e.g. status from a non-HB message status command 55 * @edx: [OUT] e.g. channel id 56 * @si: [OUT] 57 * @di: [OUT] 58 */ 59 #define VMW_PORT(cmd, in_ebx, in_si, in_di, \ 60 flags, magic, \ 61 eax, ebx, ecx, edx, si, di) \ 62 ({ \ 63 asm volatile (VMWARE_HYPERCALL : \ 64 "=a"(eax), \ 65 "=b"(ebx), \ 66 "=c"(ecx), \ 67 "=d"(edx), \ 68 "=S"(si), \ 69 "=D"(di) : \ 70 "a"(magic), \ 71 "b"(in_ebx), \ 72 "c"(cmd), \ 73 "d"(flags), \ 74 "S"(in_si), \ 75 "D"(in_di) : \ 76 "memory"); \ 77 }) 78 79 80 /** 81 * Hypervisor-specific bi-directional communication channel. Should never 82 * execute on bare metal hardware. The caller must make sure to check for 83 * supported hypervisor before using these macros. 84 * 85 * The last 3 parameters are both input and output and must be initialized. 86 * 87 * @cmd: [IN] Message Cmd 88 * @in_ecx: [IN] Message Len, through ECX 89 * @in_si: [IN] Input argument through SI, set to 0 if not used 90 * @in_di: [IN] Input argument through DI, set to 0 if not used 91 * @flags: [IN] hypercall flags + [channel id] 92 * @magic: [IN] hypervisor magic value 93 * @bp: [IN] 94 * @eax: [OUT] value of EAX register 95 * @ebx: [OUT] e.g. status from an HB message status command 96 * @ecx: [OUT] e.g. status from a non-HB message status command 97 * @edx: [OUT] e.g. channel id 98 * @si: [OUT] 99 * @di: [OUT] 100 */ 101 #ifdef __x86_64__ 102 103 #define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, \ 104 flags, magic, bp, \ 105 eax, ebx, ecx, edx, si, di) \ 106 ({ \ 107 asm volatile ("push %%rbp;" \ 108 "mov %12, %%rbp;" \ 109 VMWARE_HYPERCALL_HB_OUT \ 110 "pop %%rbp;" : \ 111 "=a"(eax), \ 112 "=b"(ebx), \ 113 "=c"(ecx), \ 114 "=d"(edx), \ 115 "=S"(si), \ 116 "=D"(di) : \ 117 "a"(magic), \ 118 "b"(cmd), \ 119 "c"(in_ecx), \ 120 "d"(flags), \ 121 "S"(in_si), \ 122 "D"(in_di), \ 123 "r"(bp) : \ 124 "memory", "cc"); \ 125 }) 126 127 128 #define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, \ 129 flags, magic, bp, \ 130 eax, ebx, ecx, edx, si, di) \ 131 ({ \ 132 asm volatile ("push %%rbp;" \ 133 "mov %12, %%rbp;" \ 134 VMWARE_HYPERCALL_HB_IN \ 135 "pop %%rbp" : \ 136 "=a"(eax), \ 137 "=b"(ebx), \ 138 "=c"(ecx), \ 139 "=d"(edx), \ 140 "=S"(si), \ 141 "=D"(di) : \ 142 "a"(magic), \ 143 "b"(cmd), \ 144 "c"(in_ecx), \ 145 "d"(flags), \ 146 "S"(in_si), \ 147 "D"(in_di), \ 148 "r"(bp) : \ 149 "memory", "cc"); \ 150 }) 151 152 #else 153 154 /* 155 * In the 32-bit version of this macro, we store bp in a memory location 156 * because we've ran out of registers. 157 * Now we can't reference that memory location while we've modified 158 * %esp or %ebp, so we first push it on the stack, just before we push 159 * %ebp, and then when we need it we read it from the stack where we 160 * just pushed it. 161 */ 162 #define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, \ 163 flags, magic, bp, \ 164 eax, ebx, ecx, edx, si, di) \ 165 ({ \ 166 asm volatile ("push %12;" \ 167 "push %%ebp;" \ 168 "mov 0x04(%%esp), %%ebp;" \ 169 VMWARE_HYPERCALL_HB_OUT \ 170 "pop %%ebp;" \ 171 "add $0x04, %%esp;" : \ 172 "=a"(eax), \ 173 "=b"(ebx), \ 174 "=c"(ecx), \ 175 "=d"(edx), \ 176 "=S"(si), \ 177 "=D"(di) : \ 178 "a"(magic), \ 179 "b"(cmd), \ 180 "c"(in_ecx), \ 181 "d"(flags), \ 182 "S"(in_si), \ 183 "D"(in_di), \ 184 "m"(bp) : \ 185 "memory", "cc"); \ 186 }) 187 188 189 #define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, \ 190 flags, magic, bp, \ 191 eax, ebx, ecx, edx, si, di) \ 192 ({ \ 193 asm volatile ("push %12;" \ 194 "push %%ebp;" \ 195 "mov 0x04(%%esp), %%ebp;" \ 196 VMWARE_HYPERCALL_HB_IN \ 197 "pop %%ebp;" \ 198 "add $0x04, %%esp;" : \ 199 "=a"(eax), \ 200 "=b"(ebx), \ 201 "=c"(ecx), \ 202 "=d"(edx), \ 203 "=S"(si), \ 204 "=D"(di) : \ 205 "a"(magic), \ 206 "b"(cmd), \ 207 "c"(in_ecx), \ 208 "d"(flags), \ 209 "S"(in_si), \ 210 "D"(in_di), \ 211 "m"(bp) : \ 212 "memory", "cc"); \ 213 }) 214 #endif /* #if __x86_64__ */ 215 216 #endif 217
Indexes created Tue Oct 21 19:09:51 GMT 2025