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1/* SPDX-License-Identifier: GPL-2.0+ OR MIT */
2/**************************************************************************
3 *
4 * Copyright 2016-2021 VMware, Inc., Palo Alto, CA., USA
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************
27 *
28 * Based on code from vmware.c and vmmouse.c.
29 * Author:
30 * Sinclair Yeh <syeh@vmware.com>
31 */
32#ifndef _VMWGFX_MSG_X86_H
33#define _VMWGFX_MSG_X86_H
34
35
36#if defined(__i386__) || defined(__x86_64__)
37
38#include <asm/vmware.h>
39
40#endif /* defined(__i386__) || defined(__x86_64__) */
41
42#endif /* _VMWGFX_MSG_X86_H */
1/* SPDX-License-Identifier: GPL-2.0+ OR MIT */
2/**************************************************************************
3 *
4 * Copyright 2016-2021 VMware, Inc., Palo Alto, CA., USA
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************
27 *
28 * Based on code from vmware.c and vmmouse.c.
29 * Author:
30 * Sinclair Yeh <syeh@vmware.com>
31 */
32#ifndef _VMWGFX_MSG_X86_H
33#define _VMWGFX_MSG_X86_H
34
35
36#if defined(__i386__) || defined(__x86_64__)
37
38#include <asm/vmware.h>
39
40/**
41 * Hypervisor-specific bi-directional communication channel. Should never
42 * execute on bare metal hardware. The caller must make sure to check for
43 * supported hypervisor before using these macros.
44 *
45 * The last two parameters are both input and output and must be initialized.
46 *
47 * @cmd: [IN] Message Cmd
48 * @in_ebx: [IN] Message Len, through EBX
49 * @in_si: [IN] Input argument through SI, set to 0 if not used
50 * @in_di: [IN] Input argument through DI, set ot 0 if not used
51 * @flags: [IN] hypercall flags + [channel id]
52 * @magic: [IN] hypervisor magic value
53 * @eax: [OUT] value of EAX register
54 * @ebx: [OUT] e.g. status from an HB message status command
55 * @ecx: [OUT] e.g. status from a non-HB message status command
56 * @edx: [OUT] e.g. channel id
57 * @si: [OUT]
58 * @di: [OUT]
59 */
60#define VMW_PORT(cmd, in_ebx, in_si, in_di, \
61 flags, magic, \
62 eax, ebx, ecx, edx, si, di) \
63({ \
64 asm volatile (VMWARE_HYPERCALL : \
65 "=a"(eax), \
66 "=b"(ebx), \
67 "=c"(ecx), \
68 "=d"(edx), \
69 "=S"(si), \
70 "=D"(di) : \
71 "a"(magic), \
72 "b"(in_ebx), \
73 "c"(cmd), \
74 "d"(flags), \
75 "S"(in_si), \
76 "D"(in_di) : \
77 "memory"); \
78})
79
80
81/**
82 * Hypervisor-specific bi-directional communication channel. Should never
83 * execute on bare metal hardware. The caller must make sure to check for
84 * supported hypervisor before using these macros.
85 *
86 * The last 3 parameters are both input and output and must be initialized.
87 *
88 * @cmd: [IN] Message Cmd
89 * @in_ecx: [IN] Message Len, through ECX
90 * @in_si: [IN] Input argument through SI, set to 0 if not used
91 * @in_di: [IN] Input argument through DI, set to 0 if not used
92 * @flags: [IN] hypercall flags + [channel id]
93 * @magic: [IN] hypervisor magic value
94 * @bp: [IN]
95 * @eax: [OUT] value of EAX register
96 * @ebx: [OUT] e.g. status from an HB message status command
97 * @ecx: [OUT] e.g. status from a non-HB message status command
98 * @edx: [OUT] e.g. channel id
99 * @si: [OUT]
100 * @di: [OUT]
101 */
102#ifdef __x86_64__
103
104#define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, \
105 flags, magic, bp, \
106 eax, ebx, ecx, edx, si, di) \
107({ \
108 asm volatile ("push %%rbp;" \
109 "mov %12, %%rbp;" \
110 VMWARE_HYPERCALL_HB_OUT \
111 "pop %%rbp;" : \
112 "=a"(eax), \
113 "=b"(ebx), \
114 "=c"(ecx), \
115 "=d"(edx), \
116 "=S"(si), \
117 "=D"(di) : \
118 "a"(magic), \
119 "b"(cmd), \
120 "c"(in_ecx), \
121 "d"(flags), \
122 "S"(in_si), \
123 "D"(in_di), \
124 "r"(bp) : \
125 "memory", "cc"); \
126})
127
128
129#define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, \
130 flags, magic, bp, \
131 eax, ebx, ecx, edx, si, di) \
132({ \
133 asm volatile ("push %%rbp;" \
134 "mov %12, %%rbp;" \
135 VMWARE_HYPERCALL_HB_IN \
136 "pop %%rbp" : \
137 "=a"(eax), \
138 "=b"(ebx), \
139 "=c"(ecx), \
140 "=d"(edx), \
141 "=S"(si), \
142 "=D"(di) : \
143 "a"(magic), \
144 "b"(cmd), \
145 "c"(in_ecx), \
146 "d"(flags), \
147 "S"(in_si), \
148 "D"(in_di), \
149 "r"(bp) : \
150 "memory", "cc"); \
151})
152
153#elif defined(__i386__)
154
155/*
156 * In the 32-bit version of this macro, we store bp in a memory location
157 * because we've ran out of registers.
158 * Now we can't reference that memory location while we've modified
159 * %esp or %ebp, so we first push it on the stack, just before we push
160 * %ebp, and then when we need it we read it from the stack where we
161 * just pushed it.
162 */
163#define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, \
164 flags, magic, bp, \
165 eax, ebx, ecx, edx, si, di) \
166({ \
167 asm volatile ("push %12;" \
168 "push %%ebp;" \
169 "mov 0x04(%%esp), %%ebp;" \
170 VMWARE_HYPERCALL_HB_OUT \
171 "pop %%ebp;" \
172 "add $0x04, %%esp;" : \
173 "=a"(eax), \
174 "=b"(ebx), \
175 "=c"(ecx), \
176 "=d"(edx), \
177 "=S"(si), \
178 "=D"(di) : \
179 "a"(magic), \
180 "b"(cmd), \
181 "c"(in_ecx), \
182 "d"(flags), \
183 "S"(in_si), \
184 "D"(in_di), \
185 "m"(bp) : \
186 "memory", "cc"); \
187})
188
189
190#define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, \
191 flags, magic, bp, \
192 eax, ebx, ecx, edx, si, di) \
193({ \
194 asm volatile ("push %12;" \
195 "push %%ebp;" \
196 "mov 0x04(%%esp), %%ebp;" \
197 VMWARE_HYPERCALL_HB_IN \
198 "pop %%ebp;" \
199 "add $0x04, %%esp;" : \
200 "=a"(eax), \
201 "=b"(ebx), \
202 "=c"(ecx), \
203 "=d"(edx), \
204 "=S"(si), \
205 "=D"(di) : \
206 "a"(magic), \
207 "b"(cmd), \
208 "c"(in_ecx), \
209 "d"(flags), \
210 "S"(in_si), \
211 "D"(in_di), \
212 "m"(bp) : \
213 "memory", "cc"); \
214})
215#endif /* defined(__i386__) */
216
217#endif /* defined(__i386__) || defined(__x86_64__) */
218
219#endif /* _VMWGFX_MSG_X86_H */