1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
|
/** @file
* IPRT - X86 and AMD64 Helpers.
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
#ifndef IPRT_INCLUDED_x86_helpers_h
#define IPRT_INCLUDED_x86_helpers_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/types.h>
/** @defgroup grp_rt_x86_helpers x86 Helper Functions
* @ingroup grp_rt_x86
* @{
*/
/**
* Tests if it a genuine Intel CPU based on the ASMCpuId(0) output.
*
* @returns true/false.
* @param uEBX EBX return from ASMCpuId(0)
* @param uECX ECX return from ASMCpuId(0)
* @param uEDX EDX return from ASMCpuId(0)
*/
DECLINLINE(bool) RTX86IsIntelCpu(uint32_t uEBX, uint32_t uECX, uint32_t uEDX)
{
/* 'GenuineIntel' */
return uEBX == UINT32_C(0x756e6547) /* 'Genu' */
&& uEDX == UINT32_C(0x49656e69) /* 'ineI' */
&& uECX == UINT32_C(0x6c65746e); /* 'ntel' */
}
/**
* Tests if it an authentic AMD CPU based on the ASMCpuId(0) output.
*
* @returns true/false.
* @param uEBX EBX return from ASMCpuId(0)
* @param uECX ECX return from ASMCpuId(0)
* @param uEDX EDX return from ASMCpuId(0)
*/
DECLINLINE(bool) RTX86IsAmdCpu(uint32_t uEBX, uint32_t uECX, uint32_t uEDX)
{
/* 'AuthenticAMD' */
return uEBX == UINT32_C(0x68747541) /* 'Auth' */
&& uEDX == UINT32_C(0x69746e65) /* 'enti' */
&& uECX == UINT32_C(0x444d4163); /* 'dAMD' */
}
/**
* Tests if it a centaur hauling VIA CPU based on the ASMCpuId(0) output.
*
* @returns true/false.
* @param uEBX EBX return from ASMCpuId(0).
* @param uECX ECX return from ASMCpuId(0).
* @param uEDX EDX return from ASMCpuId(0).
*/
DECLINLINE(bool) RTX86IsViaCentaurCpu(uint32_t uEBX, uint32_t uECX, uint32_t uEDX)
{
/* 'CentaurHauls' */
return uEBX == UINT32_C(0x746e6543) /* 'Cent' */
&& uEDX == UINT32_C(0x48727561) /* 'aurH' */
&& uECX == UINT32_C(0x736c7561); /* 'auls' */
}
/**
* Tests if it a Shanghai CPU based on the ASMCpuId(0) output.
*
* @returns true/false.
* @param uEBX EBX return from ASMCpuId(0).
* @param uECX ECX return from ASMCpuId(0).
* @param uEDX EDX return from ASMCpuId(0).
*/
DECLINLINE(bool) RTX86IsShanghaiCpu(uint32_t uEBX, uint32_t uECX, uint32_t uEDX)
{
/* ' Shanghai ' */
return uEBX == UINT32_C(0x68532020) /* ' Sh' */
&& uEDX == UINT32_C(0x68676e61) /* 'angh' */
&& uECX == UINT32_C(0x20206961); /* 'ai ' */
}
/**
* Tests if it a genuine Hygon CPU based on the ASMCpuId(0) output.
*
* @returns true/false.
* @param uEBX EBX return from ASMCpuId(0)
* @param uECX ECX return from ASMCpuId(0)
* @param uEDX EDX return from ASMCpuId(0)
*/
DECLINLINE(bool) RTX86IsHygonCpu(uint32_t uEBX, uint32_t uECX, uint32_t uEDX)
{
/* 'HygonGenuine' */
return uEBX == UINT32_C(0x6f677948) /* Hygo */
&& uECX == UINT32_C(0x656e6975) /* uine */
&& uEDX == UINT32_C(0x6e65476e); /* nGen */
}
/**
* Checks whether ASMCpuId_EAX(0x00000000) indicates a valid range.
*
*
* @returns true/false.
* @param uEAX The EAX value of CPUID leaf 0x00000000.
*
* @note This only succeeds if there are at least two leaves in the range.
* @remarks The upper range limit is just some half reasonable value we've
* picked out of thin air.
*/
DECLINLINE(bool) RTX86IsValidStdRange(uint32_t uEAX)
{
return uEAX >= UINT32_C(0x00000001) && uEAX <= UINT32_C(0x000fffff);
}
/**
* Checks whether ASMCpuId_EAX(0x80000000) indicates a valid range.
*
* This only succeeds if there are at least two leaves in the range.
*
* @returns true/false.
* @param uEAX The EAX value of CPUID leaf 0x80000000.
*
* @note This only succeeds if there are at least two leaves in the range.
* @remarks The upper range limit is just some half reasonable value we've
* picked out of thin air.
*/
DECLINLINE(bool) RTX86IsValidExtRange(uint32_t uEAX)
{
return uEAX >= UINT32_C(0x80000001) && uEAX <= UINT32_C(0x800fffff);
}
/**
* Checks whether ASMCpuId_EAX(0x40000000) indicates a valid range.
*
* This only succeeds if there are at least two leaves in the range.
*
* @returns true/false.
* @param uEAX The EAX value of CPUID leaf 0x40000000.
*
* @note Unlike RTX86IsValidStdRange() and RTX86IsValidExtRange(), a single
* leaf is okay here. So, you always need to check the range.
* @remarks The upper range limit is take from the intel docs.
*/
DECLINLINE(bool) RTX86IsValidHypervisorRange(uint32_t uEAX)
{
return uEAX >= UINT32_C(0x40000000) && uEAX <= UINT32_C(0x4fffffff);
}
/**
* Extracts the CPU family from ASMCpuId(1) or ASMCpuId(0x80000001)
*
* @returns Family.
* @param uEAX EAX return from ASMCpuId(1) or ASMCpuId(0x80000001).
*/
DECLINLINE(uint32_t) RTX86GetCpuFamily(uint32_t uEAX)
{
return ((uEAX >> 8) & 0xf) == 0xf
? ((uEAX >> 20) & 0x7f) + 0xf
: ((uEAX >> 8) & 0xf);
}
/**
* Extracts the CPU model from ASMCpuId(1) or ASMCpuId(0x80000001), Intel variant.
*
* @returns Model.
* @param uEAX EAX from ASMCpuId(1) or ASMCpuId(0x80000001).
*/
DECLINLINE(uint32_t) RTX86GetCpuModelIntel(uint32_t uEAX)
{
return ((uEAX >> 8) & 0xf) == 0xf || (((uEAX >> 8) & 0xf) == 0x6) /* family! */
? ((uEAX >> 4) & 0xf) | ((uEAX >> 12) & 0xf0)
: ((uEAX >> 4) & 0xf);
}
/**
* Extracts the CPU model from ASMCpuId(1) or ASMCpuId(0x80000001), AMD variant.
*
* @returns Model.
* @param uEAX EAX from ASMCpuId(1) or ASMCpuId(0x80000001).
*/
DECLINLINE(uint32_t) RTX86GetCpuModelAMD(uint32_t uEAX)
{
return ((uEAX >> 8) & 0xf) == 0xf
? ((uEAX >> 4) & 0xf) | ((uEAX >> 12) & 0xf0)
: ((uEAX >> 4) & 0xf);
}
/**
* Extracts the CPU model from ASMCpuId(1) or ASMCpuId(0x80000001)
*
* @returns Model.
* @param uEAX EAX from ASMCpuId(1) or ASMCpuId(0x80000001).
* @param fIntel Whether it's an intel CPU. Use RTX86IsIntelCpu() or
* RTX86IsIntelCpu().
*/
DECLINLINE(uint32_t) RTX86GetCpuModel(uint32_t uEAX, bool fIntel)
{
return ((uEAX >> 8) & 0xf) == 0xf || (((uEAX >> 8) & 0xf) == 0x6 && fIntel) /* family! */
? ((uEAX >> 4) & 0xf) | ((uEAX >> 12) & 0xf0)
: ((uEAX >> 4) & 0xf);
}
/**
* Extracts the CPU stepping from ASMCpuId(1) or ASMCpuId(0x80000001)
*
* @returns Model.
* @param uEAX EAX from ASMCpuId(1) or ASMCpuId(0x80000001).
*/
DECLINLINE(uint32_t) RTX86GetCpuStepping(uint32_t uEAX)
{
return uEAX & 0xf;
}
/** @} */
#endif /* !IPRT_INCLUDED_x86_helpers_h */
|
