FD.io VPP  v19.01.1-17-ge106252
Vector Packet Processing
cpu.c
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1 /*
2  * Copyright (c) 2016 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 #include <fcntl.h>
16 #include <vppinfra/clib.h>
17 #include <vppinfra/format.h>
18 #include <vppinfra/cpu.h>
19 
20 #define foreach_x86_cpu_uarch \
21  _(0x06, 0x9e, "Kaby Lake", "Kaby Lake DT/H/S/X") \
22  _(0x06, 0x8e, "Kaby Lake", "Kaby Lake Y/U") \
23  _(0x06, 0x85, "Knights Mill", "Knights Mill") \
24  _(0x06, 0x5f, "Goldmont", "Denverton") \
25  _(0x06, 0x5e, "Skylake", "Skylake DT/H/S") \
26  _(0x06, 0x5c, "Goldmont", "Apollo Lake") \
27  _(0x06, 0x5a, "Silvermont", "Moorefield") \
28  _(0x06, 0x57, "Knights Landing", "Knights Landing") \
29  _(0x06, 0x56, "Broadwell", "Broadwell DE") \
30  _(0x06, 0x55, "Skylake", "Skylake X/SP") \
31  _(0x06, 0x4f, "Broadwell", "Broadwell EP/EX") \
32  _(0x06, 0x4e, "Skylake", "Skylake Y/U") \
33  _(0x06, 0x4d, "Silvermont", "Rangeley") \
34  _(0x06, 0x4c, "Airmont", "Braswell") \
35  _(0x06, 0x47, "Broadwell", "Broadwell H") \
36  _(0x06, 0x46, "Haswell", "Crystalwell") \
37  _(0x06, 0x45, "Haswell", "Haswell ULT") \
38  _(0x06, 0x3f, "Haswell", "Haswell E") \
39  _(0x06, 0x3e, "Ivy Bridge", "Ivy Bridge E/EN/EP") \
40  _(0x06, 0x3d, "Broadwell", "Broadwell U") \
41  _(0x06, 0x3c, "Haswell", "Haswell") \
42  _(0x06, 0x3a, "Ivy Bridge", "IvyBridge") \
43  _(0x06, 0x37, "Silvermont", "BayTrail") \
44  _(0x06, 0x36, "Saltwell", "Cedarview,Centerton") \
45  _(0x06, 0x35, "Saltwell", "Cloverview") \
46  _(0x06, 0x2f, "Westmere", "Westmere EX") \
47  _(0x06, 0x2e, "Nehalem", "Nehalem EX") \
48  _(0x06, 0x2d, "Sandy Bridge", "SandyBridge E/EN/EP") \
49  _(0x06, 0x2c, "Westmere", "Westmere EP/EX,Gulftown") \
50  _(0x06, 0x2a, "Sandy Bridge", "Sandy Bridge") \
51  _(0x06, 0x27, "Saltwell", "Medfield") \
52  _(0x06, 0x26, "Bonnell", "Tunnel Creek") \
53  _(0x06, 0x25, "Westmere", "Arrandale,Clarksdale") \
54  _(0x06, 0x1e, "Nehalem", "Clarksfield,Lynnfield,Jasper Forest") \
55  _(0x06, 0x1d, "Penryn", "Dunnington") \
56  _(0x06, 0x1c, "Bonnell", "Pineview,Silverthorne") \
57  _(0x06, 0x1a, "Nehalem", "Nehalem EP,Bloomfield)") \
58  _(0x06, 0x17, "Penryn", "Yorkfield,Wolfdale,Penryn,Harpertown")
59 
60 #define foreach_aarch64_cpu_uarch \
61  _(0x41, 0xd03, "ARM", "Cortex-A53") \
62  _(0x41, 0xd07, "ARM", "Cortex-A57") \
63  _(0x41, 0xd08, "ARM", "Cortex-A72") \
64  _(0x41, 0xd09, "ARM", "Cortex-A73") \
65  _(0x43, 0x0a1, "Cavium", "ThunderX CN88XX") \
66  _(0x43, 0x0a2, "Cavium", "Octeon TX CN81XX") \
67  _(0x43, 0x0a3, "Cavium", "Octeon TX CN83XX") \
68  _(0x43, 0x0af, "Cavium", "ThunderX2 CN99XX") \
69  _(0x43, 0x0b1, "Cavium", "Octeon TX2 CN98XX") \
70  _(0x43, 0x0b2, "Cavium", "Octeon TX2 CN93XX") \
71 
72 u8 *
73 format_cpu_uarch (u8 * s, va_list * args)
74 {
75 #if __x86_64__
76  u32 __attribute__ ((unused)) eax, ebx, ecx, edx;
77  u8 model, family, stepping;
78 
79  if (__get_cpuid (1, &eax, &ebx, &ecx, &edx) == 0)
80  return format (s, "unknown (missing cpuid)");
81 
82  model = ((eax >> 4) & 0x0f) | ((eax >> 12) & 0xf0);
83  family = (eax >> 8) & 0x0f;
84  stepping = eax & 0x0f;
85 
86 #define _(f,m,a,c) if ((model == m) && (family == f)) return \
87 format(s, "[0x%x] %s ([0x%02x] %s) stepping 0x%x", f, a, m, c, stepping);
89 #undef _
90  return format (s, "unknown (family 0x%02x model 0x%02x)", family, model);
91 
92 #elif __aarch64__
93  int fd;
94  unformat_input_t input;
95  u32 implementer, primary_part_number, variant, revision;
96 
97  fd = open ("/proc/cpuinfo", 0);
98  if (fd < 0)
99  return format (s, "unknown");
100 
101  unformat_init_clib_file (&input, fd);
102  while (unformat_check_input (&input) != UNFORMAT_END_OF_INPUT)
103  {
104  if (unformat (&input, "CPU implementer%_: 0x%x", &implementer))
105  ;
106  else if (unformat (&input, "CPU part%_: 0x%x", &primary_part_number))
107  ;
108  else if (unformat (&input, "CPU variant%_: 0x%x", &variant))
109  ;
110  else if (unformat (&input, "CPU revision%_: %u", &revision))
111  ;
112  else
113  unformat_skip_line (&input);
114  }
115  unformat_free (&input);
116  close (fd);
117 
118  /* Note: Cavium starts counting variants from 1 instead of 0 */
119  if (implementer == 0x43)
120  variant++;
121 
122 #define _(i,p,a,c) if ((implementer == i) && (primary_part_number == p)) \
123  return format(s, "%s (%s PASS %u.%u)", a, c, variant, revision);
125 #undef _
126  return format (s, "unknown (implementer 0x%02x part 0x%03x PASS %u.%u)",
127  implementer, primary_part_number, variant, revision);
128 
129 #else /* ! __x86_64__ */
130  return format (s, "unknown");
131 #endif
132 }
133 
134 u8 *
135 format_cpu_model_name (u8 * s, va_list * args)
136 {
137 #if __x86_64__
138  u32 __attribute__ ((unused)) eax, ebx, ecx, edx;
139  u8 *name = 0;
140  u32 *name_u32;
141 
142  if (__get_cpuid (1, &eax, &ebx, &ecx, &edx) == 0)
143  return format (s, "unknown (missing cpuid)");
144 
145  __get_cpuid (0x80000000, &eax, &ebx, &ecx, &edx);
146  if (eax < 0x80000004)
147  return format (s, "unknown (missing ext feature)");
148 
149  vec_validate (name, 48);
150  name_u32 = (u32 *) name;
151 
152  __get_cpuid (0x80000002, &eax, &ebx, &ecx, &edx);
153  name_u32[0] = eax;
154  name_u32[1] = ebx;
155  name_u32[2] = ecx;
156  name_u32[3] = edx;
157 
158  __get_cpuid (0x80000003, &eax, &ebx, &ecx, &edx);
159  name_u32[4] = eax;
160  name_u32[5] = ebx;
161  name_u32[6] = ecx;
162  name_u32[7] = edx;
163 
164  __get_cpuid (0x80000004, &eax, &ebx, &ecx, &edx);
165  name_u32[8] = eax;
166  name_u32[9] = ebx;
167  name_u32[10] = ecx;
168  name_u32[11] = edx;
169 
170  s = format (s, "%s", name);
171  vec_free (name);
172  return s;
173 
174 #elif defined(__aarch64__)
175  return format (s, "armv8");
176 #else /* ! __x86_64__ */
177  return format (s, "unknown");
178 #endif
179 }
180 
181 
182 static inline char const *
183 flag_skip_prefix (char const *flag)
184 {
185  if (memcmp (flag, "x86_", sizeof ("x86_") - 1) == 0)
186  return flag + sizeof ("x86_") - 1;
187  if (memcmp (flag, "aarch64_", sizeof ("aarch64_") - 1) == 0)
188  return flag + sizeof ("aarch64_") - 1;
189  return flag;
190 }
191 
192 u8 *
193 format_cpu_flags (u8 * s, va_list * args)
194 {
195 #if defined(__x86_64__)
196 #define _(flag, func, reg, bit) \
197  if (clib_cpu_supports_ ## flag()) \
198  s = format (s, "%s ", flag_skip_prefix(#flag));
199  foreach_x86_64_flags return s;
200 #undef _
201 #elif defined(__aarch64__)
202 #define _(flag, bit) \
203  if (clib_cpu_supports_ ## flag()) \
204  s = format (s, "%s ", flag_skip_prefix(#flag));
205  foreach_aarch64_flags return s;
206 #undef _
207 #else /* ! ! __x86_64__ && ! __aarch64__ */
208  return format (s, "unknown");
209 #endif
210 }
211 
212 
213 
214 /*
215  * fd.io coding-style-patch-verification: ON
216  *
217  * Local Variables:
218  * eval: (c-set-style "gnu")
219  * End:
220  */
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:439
static char const * flag_skip_prefix(char const *flag)
Definition: cpu.c:183
u8 * format_cpu_uarch(u8 *s, va_list *args)
Definition: cpu.c:73
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
#define foreach_aarch64_flags
Definition: cpu.h:77
unsigned char u8
Definition: types.h:56
void unformat_init_clib_file(unformat_input_t *input, int file_descriptor)
Definition: unformat.c:1058
static void unformat_skip_line(unformat_input_t *i)
Definition: format.h:221
#define foreach_aarch64_cpu_uarch
Definition: cpu.c:60
unsigned int u32
Definition: types.h:88
u8 * format_cpu_model_name(u8 *s, va_list *args)
Definition: cpu.c:135
struct _unformat_input_t unformat_input_t
u8 name[64]
Definition: memclnt.api:152
#define UNFORMAT_END_OF_INPUT
Definition: format.h:144
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:341
u8 * format_cpu_flags(u8 *s, va_list *args)
Definition: cpu.c:193
#define foreach_x86_64_flags
Definition: cpu.h:64
#define foreach_x86_cpu_uarch
Definition: cpu.c:20
static void unformat_free(unformat_input_t *i)
Definition: format.h:162
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:972
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:170