diff options
| -rw-r--r-- | src/libstrongswan/Android.mk | 2 | ||||
| -rw-r--r-- | src/libstrongswan/Makefile.am | 4 | ||||
| -rw-r--r-- | src/libstrongswan/utils/cpu_feature.c | 113 | ||||
| -rw-r--r-- | src/libstrongswan/utils/cpu_feature.h | 51 |
4 files changed, 167 insertions, 3 deletions
diff --git a/src/libstrongswan/Android.mk b/src/libstrongswan/Android.mk index d9cc08a97..b137b73f9 100644 --- a/src/libstrongswan/Android.mk +++ b/src/libstrongswan/Android.mk @@ -36,7 +36,7 @@ pen/pen.c plugins/plugin_loader.c plugins/plugin_feature.c processing/jobs/job.c processing/jobs/callback_job.c processing/processor.c processing/scheduler.c \ processing/watcher.c resolver/resolver_manager.c resolver/rr_set.c \ selectors/traffic_selector.c settings/settings.c settings/settings_types.c \ -settings/settings_parser.c settings/settings_lexer.c \ +settings/settings_parser.c settings/settings_lexer.c utils/cpu_feature.c \ utils/utils.c utils/chunk.c utils/debug.c utils/enum.c utils/identification.c \ utils/lexparser.c utils/optionsfrom.c utils/capabilities.c utils/backtrace.c \ utils/parser_helper.c utils/test.c utils/process.c utils/utils/strerror.c diff --git a/src/libstrongswan/Makefile.am b/src/libstrongswan/Makefile.am index 2521b3e77..f7380728a 100644 --- a/src/libstrongswan/Makefile.am +++ b/src/libstrongswan/Makefile.am @@ -34,7 +34,7 @@ pen/pen.c plugins/plugin_loader.c plugins/plugin_feature.c processing/jobs/job.c processing/jobs/callback_job.c processing/processor.c processing/scheduler.c \ processing/watcher.c resolver/resolver_manager.c resolver/rr_set.c \ selectors/traffic_selector.c settings/settings.c settings/settings_types.c \ -settings/settings_parser.y settings/settings_lexer.l \ +settings/settings_parser.y settings/settings_lexer.l utils/cpu_feature.c \ utils/utils.c utils/chunk.c utils/debug.c utils/enum.c utils/identification.c \ utils/lexparser.c utils/optionsfrom.c utils/capabilities.c utils/backtrace.c \ utils/parser_helper.c utils/test.c utils/process.c utils/utils/strerror.c @@ -103,7 +103,7 @@ threading/mutex.h threading/condvar.h threading/spinlock.h threading/semaphore.h threading/rwlock.h threading/rwlock_condvar.h threading/lock_profiler.h \ utils/utils.h utils/chunk.h utils/debug.h utils/enum.h utils/identification.h \ utils/lexparser.h utils/optionsfrom.h utils/capabilities.h utils/backtrace.h \ -utils/leak_detective.h utils/printf_hook/printf_hook.h \ +utils/cpu_feature.h utils/leak_detective.h utils/printf_hook/printf_hook.h \ utils/printf_hook/printf_hook_vstr.h utils/printf_hook/printf_hook_builtin.h \ utils/parser_helper.h utils/test.h utils/integrity_checker.h utils/process.h \ utils/utils/strerror.h utils/compat/windows.h utils/compat/apple.h diff --git a/src/libstrongswan/utils/cpu_feature.c b/src/libstrongswan/utils/cpu_feature.c new file mode 100644 index 000000000..b88cf2f9f --- /dev/null +++ b/src/libstrongswan/utils/cpu_feature.c @@ -0,0 +1,113 @@ +/* + * Copyright (C) 2015 Martin Willi + * Copyright (C) 2015 revosec AG + * + * 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; either version 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +#include "cpu_feature.h" + +#if defined __i386__ || defined(__x86_64__) + +typedef enum { + /* Generic CPUID(1) flags */ + CPUID1_EDX_MMX = (1 << 23), + CPUID1_EDX_SSE = (1 << 25), + CPUID1_EDX_SSE2 = (1 << 26), + CPUID1_ECX_SSE3 = (1 << 0), + CPUID1_ECX_PCLMULQDQ = (1 << 1), + CPUID1_ECX_SSSE3 = (1 << 9), + CPUID1_ECX_SSE41 = (1 << 19), + CPUID1_ECX_SSE42 = (1 << 20), + CPUID1_ECX_AESNI = (1 << 25), + CPUID1_ECX_AVX = (1 << 28), + CPUID1_ECX_RDRAND = (1 << 30), +} cpuid_flag_t; + +/** + * Get cpuid for info, return eax, ebx, ecx and edx. + * -fPIC requires to save ebx on IA-32. + */ +static void cpuid(u_int op, u_int *a, u_int *b, u_int *c, u_int *d) +{ +#ifdef __x86_64__ + asm("cpuid" : "=a" (*a), "=b" (*b), "=c" (*c), "=d" (*d) : "a" (op)); +#else /* __i386__ */ + asm("pushl %%ebx;" + "cpuid;" + "movl %%ebx, %1;" + "popl %%ebx;" + : "=a" (*a), "=r" (*b), "=c" (*c), "=d" (*d) : "a" (op)); +#endif /* __x86_64__ / __i386__*/ +} + +/** + * Return feature if flag in reg, flag-to-feature + */ +static inline cpu_feature_t f2f(u_int reg, cpuid_flag_t flag, cpu_feature_t f) +{ + if (reg & flag) + { + return f; + } + return 0; +} + +/** + * See header. + */ +cpu_feature_t cpu_feature_get_all() +{ + char vendor[3 * sizeof(u_int32_t) + 1]; + cpu_feature_t f = 0; + u_int a, b, c, d; + + cpuid(0, &a, &b, &c, &d); + /* VendorID string is in b-d-c (yes, in this order) */ + snprintf(vendor, sizeof(vendor), "%.4s%.4s%.4s", &b, &d, &c); + + cpuid(1, &a, &b, &c, &d); + + /* check common x86 features for CPUID(1) */ + f |= f2f(d, CPUID1_EDX_MMX, CPU_FEATURE_MMX); + f |= f2f(d, CPUID1_EDX_SSE, CPU_FEATURE_SSE); + f |= f2f(d, CPUID1_EDX_SSE2, CPU_FEATURE_SSE2); + f |= f2f(c, CPUID1_ECX_SSE3, CPU_FEATURE_SSE3); + f |= f2f(c, CPUID1_ECX_PCLMULQDQ, CPU_FEATURE_PCLMULQDQ); + f |= f2f(c, CPUID1_ECX_SSSE3, CPU_FEATURE_SSSE3); + f |= f2f(c, CPUID1_ECX_SSE41, CPU_FEATURE_SSE41); + f |= f2f(c, CPUID1_ECX_SSE42, CPU_FEATURE_SSE42); + f |= f2f(c, CPUID1_ECX_AESNI, CPU_FEATURE_AESNI); + f |= f2f(c, CPUID1_ECX_AVX, CPU_FEATURE_AVX); + f |= f2f(c, CPUID1_ECX_RDRAND, CPU_FEATURE_RDRAND); + + return f; +} + +#else /* !x86 */ + +/** + * See header. + */ +cpu_feature_t cpu_feature_get_all() +{ + return 0; +} + +#endif + +/** + * See header. + */ +bool cpu_feature_available(cpu_feature_t feature) +{ + return (cpu_feature_get_all() & feature) == feature; +} diff --git a/src/libstrongswan/utils/cpu_feature.h b/src/libstrongswan/utils/cpu_feature.h new file mode 100644 index 000000000..d7300a30a --- /dev/null +++ b/src/libstrongswan/utils/cpu_feature.h @@ -0,0 +1,51 @@ +/* + * Copyright (C) 2015 Martin Willi + * Copyright (C) 2015 revosec AG + * + * 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; either version 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +/** + * @defgroup cpu_feature cpu_feature + * @{ @ingroup utils + */ + +#ifndef CPU_FEATURE_H_ +#define CPU_FEATURE_H_ + +#include <library.h> + +typedef enum { + /** x86/x64 extensions */ + CPU_FEATURE_MMX = (1 << 0), + CPU_FEATURE_SSE = (1 << 1), + CPU_FEATURE_SSE2 = (1 << 2), + CPU_FEATURE_SSE3 = (1 << 3), + CPU_FEATURE_SSSE3 = (1 << 4), + CPU_FEATURE_SSE41 = (1 << 5), + CPU_FEATURE_SSE42 = (1 << 6), + CPU_FEATURE_AVX = (1 << 7), + CPU_FEATURE_RDRAND = (1 << 8), + CPU_FEATURE_AESNI = (1 << 9), + CPU_FEATURE_PCLMULQDQ = (1 << 10), +} cpu_feature_t; + +/** + * Get a bitmask for all supported CPU features + */ +cpu_feature_t cpu_feature_get_all(); + +/** + * Check if a given set of CPU features is available. + */ +bool cpu_feature_available(cpu_feature_t feature); + +#endif /** CPU_FEATURE_H_ @}*/ |