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:
7 * http://www.apache.org/licenses/LICENSE-2.0
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.
16 #ifndef included_clib_cpu_h
17 #define included_clib_cpu_h
19 #include <sys/syscall.h>
20 #include <vppinfra/format.h>
22 #if defined(__x86_64__)
23 #define foreach_march_variant \
24 _ (hsw, "Intel Haswell") \
25 _ (trm, "Intel Tremont") \
26 _ (skx, "Intel Skylake (server) / Cascade Lake") \
27 _ (icl, "Intel Ice Lake")
28 #elif defined(__aarch64__)
29 #define foreach_march_variant \
30 _ (octeontx2, "Marvell Octeon TX2") \
31 _ (thunderx2t99, "Marvell ThunderX2 T99") \
32 _ (qdf24xx, "Qualcomm CentriqTM 2400") \
33 _ (cortexa72, "ARM Cortex-A72") \
34 _ (neoversen1, "ARM Neoverse N1")
36 #define foreach_march_variant
41 CLIB_MARCH_VARIANT_TYPE = 0,
42 #define _(s, n) CLIB_MARCH_VARIANT_TYPE_##s,
45 CLIB_MARCH_TYPE_N_VARIANTS
46 } clib_march_variant_type_t;
48 #ifdef CLIB_MARCH_VARIANT
49 #define __CLIB_MULTIARCH_FN(a,b) a##_##b
50 #define _CLIB_MULTIARCH_FN(a,b) __CLIB_MULTIARCH_FN(a,b)
51 #define CLIB_MULTIARCH_FN(fn) _CLIB_MULTIARCH_FN(fn,CLIB_MARCH_VARIANT)
53 #define CLIB_MULTIARCH_FN(fn) fn
56 #define CLIB_MARCH_SFX CLIB_MULTIARCH_FN
58 typedef struct _clib_march_fn_registration
62 struct _clib_march_fn_registration *next;
64 } clib_march_fn_registration;
66 static_always_inline void *
67 clib_march_select_fn_ptr (clib_march_fn_registration * r)
74 if (last_prio < r->priority)
76 last_prio = r->priority;
84 #define CLIB_MARCH_FN_POINTER(fn) \
85 (__typeof__ (fn) *) clib_march_select_fn_ptr (fn##_march_fn_registrations);
87 #define _CLIB_MARCH_FN_REGISTRATION(fn) \
88 static clib_march_fn_registration \
89 CLIB_MARCH_SFX(fn##_march_fn_registration) = \
91 .name = CLIB_MARCH_VARIANT_STR \
94 static void __clib_constructor \
95 fn##_march_register () \
97 clib_march_fn_registration *r; \
98 r = & CLIB_MARCH_SFX (fn##_march_fn_registration); \
99 r->priority = CLIB_MARCH_FN_PRIORITY(); \
100 r->next = fn##_march_fn_registrations; \
101 r->function = CLIB_MARCH_SFX (fn); \
102 fn##_march_fn_registrations = r; \
105 #ifdef CLIB_MARCH_VARIANT
106 #define CLIB_MARCH_FN_REGISTRATION(fn) \
107 extern clib_march_fn_registration *fn##_march_fn_registrations; \
108 _CLIB_MARCH_FN_REGISTRATION(fn)
110 #define CLIB_MARCH_FN_REGISTRATION(fn) \
111 clib_march_fn_registration *fn##_march_fn_registrations = 0; \
112 _CLIB_MARCH_FN_REGISTRATION(fn)
114 #define foreach_x86_64_flags \
115 _ (sse3, 1, ecx, 0) \
116 _ (pclmulqdq, 1, ecx, 1) \
117 _ (ssse3, 1, ecx, 9) \
118 _ (sse41, 1, ecx, 19) \
119 _ (sse42, 1, ecx, 20) \
120 _ (avx, 1, ecx, 28) \
121 _ (rdrand, 1, ecx, 30) \
122 _ (avx2, 7, ebx, 5) \
123 _ (rtm, 7, ebx, 11) \
124 _ (pqm, 7, ebx, 12) \
125 _ (pqe, 7, ebx, 15) \
126 _ (avx512f, 7, ebx, 16) \
127 _ (rdseed, 7, ebx, 18) \
128 _ (x86_aes, 1, ecx, 25) \
129 _ (sha, 7, ebx, 29) \
130 _ (vaes, 7, ecx, 9) \
131 _ (vpclmulqdq, 7, ecx, 10) \
132 _ (avx512_vnni, 7, ecx, 11) \
133 _ (avx512_bitalg, 7, ecx, 12) \
134 _ (avx512_vpopcntdq, 7, ecx, 14) \
135 _ (movdiri, 7, ecx, 27) \
136 _ (movdir64b, 7, ecx, 28) \
137 _ (invariant_tsc, 0x80000007, edx, 8)
139 #define foreach_aarch64_flags \
164 u32 clib_get_current_cpu_id ();
165 u32 clib_get_current_numa_node ();
167 #if defined(__x86_64__)
171 clib_get_cpuid (const u32 lev, u32 * eax, u32 * ebx, u32 * ecx, u32 * edx)
173 if ((u32) __get_cpuid_max (0x80000000 & lev, 0) < lev)
176 __cpuid_count (lev, 0, *eax, *ebx, *ecx, *edx);
178 __cpuid (lev, *eax, *ebx, *ecx, *edx);
182 typedef int (*clib_cpu_supports_func_t) ();
184 #define _(flag, func, reg, bit) \
186 clib_cpu_supports_ ## flag() \
188 u32 __attribute__((unused)) eax, ebx = 0, ecx = 0, edx = 0; \
189 clib_get_cpuid (func, &eax, &ebx, &ecx, &edx); \
191 return ((reg & (1 << bit)) != 0); \
195 #else /* __x86_64__ */
197 #define _(flag, func, reg, bit) \
198 static inline int clib_cpu_supports_ ## flag() { return 0; }
201 #endif /* __x86_64__ */
202 #if defined(__aarch64__)
203 #include <sys/auxv.h>
204 #define _(flag, bit) \
206 clib_cpu_supports_ ## flag() \
208 unsigned long hwcap = getauxval(AT_HWCAP); \
209 return (hwcap & (1 << bit)); \
211 foreach_aarch64_flags
213 #else /* ! __x86_64__ && !__aarch64__ */
214 #define _(flag, bit) \
215 static inline int clib_cpu_supports_ ## flag() { return 0; }
216 foreach_aarch64_flags
218 #endif /* __x86_64__, __aarch64__ */
220 * aes is the only feature with the same name in both flag lists
221 * handle this by prefixing it with the arch name, and handling it
222 * with the custom function below
225 clib_cpu_supports_aes ()
227 #if defined(__x86_64__)
228 return clib_cpu_supports_x86_aes ();
229 #elif defined (__aarch64__)
230 return clib_cpu_supports_aarch64_aes ();
237 clib_cpu_march_priority_icl ()
239 if (clib_cpu_supports_avx512_bitalg ())
245 clib_cpu_march_priority_skx ()
247 if (clib_cpu_supports_avx512f ())
253 clib_cpu_march_priority_trm ()
255 if (clib_cpu_supports_movdiri ())
261 clib_cpu_march_priority_hsw ()
263 if (clib_cpu_supports_avx2 ())
269 clib_cpu_implementer ()
272 static u32 implementer = -1;
274 if (-1 != implementer)
277 FILE *fp = fopen ("/proc/cpuinfo", "r");
283 if (!fgets (buf, sizeof (buf), fp))
286 if (strstr (buf, "CPU implementer"))
287 implementer = (u32) strtol (memchr (buf, ':', 128) + 2, NULL, 0);
288 if (-1 != implementer)
300 static u32 part = -1;
305 FILE *fp = fopen ("/proc/cpuinfo", "r");
311 if (!fgets (buf, sizeof (buf), fp))
314 if (strstr (buf, "CPU part"))
315 part = (u32) strtol (memchr (buf, ':', 128) + 2, NULL, 0);
324 #define AARCH64_CPU_IMPLEMENTER_CAVIUM 0x43
325 #define AARCH64_CPU_PART_THUNDERX2 0x0af
326 #define AARCH64_CPU_PART_OCTEONTX2T96 0x0b2
327 #define AARCH64_CPU_PART_OCTEONTX2T98 0x0b1
328 #define AARCH64_CPU_IMPLEMENTER_QDF24XX 0x51
329 #define AARCH64_CPU_PART_QDF24XX 0xc00
330 #define AARCH64_CPU_IMPLEMENTER_CORTEXA72 0x41
331 #define AARCH64_CPU_PART_CORTEXA72 0xd08
332 #define AARCH64_CPU_IMPLEMENTER_NEOVERSEN1 0x41
333 #define AARCH64_CPU_PART_NEOVERSEN1 0xd0c
336 clib_cpu_march_priority_octeontx2 ()
338 if ((AARCH64_CPU_IMPLEMENTER_CAVIUM == clib_cpu_implementer ()) &&
339 ((AARCH64_CPU_PART_OCTEONTX2T96 == clib_cpu_part ())
340 || AARCH64_CPU_PART_OCTEONTX2T98 == clib_cpu_part ()))
346 clib_cpu_march_priority_thunderx2t99 ()
348 if ((AARCH64_CPU_IMPLEMENTER_CAVIUM == clib_cpu_implementer ()) &&
349 (AARCH64_CPU_PART_THUNDERX2 == clib_cpu_part ()))
355 clib_cpu_march_priority_qdf24xx ()
357 if ((AARCH64_CPU_IMPLEMENTER_QDF24XX == clib_cpu_implementer ()) &&
358 (AARCH64_CPU_PART_QDF24XX == clib_cpu_part ()))
364 clib_cpu_march_priority_cortexa72 ()
366 if ((AARCH64_CPU_IMPLEMENTER_CORTEXA72 == clib_cpu_implementer ()) &&
367 (AARCH64_CPU_PART_CORTEXA72 == clib_cpu_part ()))
373 clib_cpu_march_priority_neoversen1 ()
375 if ((AARCH64_CPU_IMPLEMENTER_NEOVERSEN1 == clib_cpu_implementer ()) &&
376 (AARCH64_CPU_PART_NEOVERSEN1 == clib_cpu_part ()))
381 #ifdef CLIB_MARCH_VARIANT
382 #define CLIB_MARCH_FN_PRIORITY() CLIB_MARCH_SFX(clib_cpu_march_priority)()
384 #define CLIB_MARCH_FN_PRIORITY() 0
386 #endif /* included_clib_cpu_h */
388 #define CLIB_MARCH_FN_CONSTRUCTOR(fn) \
389 static void __clib_constructor \
390 CLIB_MARCH_SFX(fn ## _march_constructor) (void) \
392 if (CLIB_MARCH_FN_PRIORITY() > fn ## _selected_priority) \
394 fn ## _selected = & CLIB_MARCH_SFX (fn ## _ma); \
395 fn ## _selected_priority = CLIB_MARCH_FN_PRIORITY(); \
399 #ifndef CLIB_MARCH_VARIANT
400 #define CLIB_MARCH_FN(fn, rtype, _args...) \
401 static rtype CLIB_MARCH_SFX (fn##_ma) (_args); \
402 rtype (*fn##_selected) (_args) = &CLIB_MARCH_SFX (fn##_ma); \
403 int fn##_selected_priority = 0; \
404 static inline rtype CLIB_MARCH_SFX (fn##_ma) (_args)
406 #define CLIB_MARCH_FN(fn, rtype, _args...) \
407 static rtype CLIB_MARCH_SFX (fn##_ma) (_args); \
408 extern rtype (*fn##_selected) (_args); \
409 extern int fn##_selected_priority; \
410 CLIB_MARCH_FN_CONSTRUCTOR (fn) \
411 static rtype CLIB_MARCH_SFX (fn##_ma) (_args)
414 #define CLIB_MARCH_FN_SELECT(fn) (* fn ## _selected)
416 format_function_t format_cpu_uarch;
417 format_function_t format_cpu_model_name;
418 format_function_t format_cpu_flags;
421 * fd.io coding-style-patch-verification: ON
424 * eval: (c-set-style "gnu")