lib/librte_eal/common/eal_common_cpuflags.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #include <stdio.h>
   6
   7 #include <rte_common.h>
   8 #include <rte_cpuflags.h>
   9
  10 /**
  11  * Checks if the machine is adequate for running the binary. If it is not, the
  12  * program exits with status 1.
  13  */
  14 void
  15 rte_cpu_check_supported(void)
  16 {
  17         if (!rte_cpu_is_supported())
  18                 exit(1);
  19 }
  20
  21 int
  22 rte_cpu_is_supported(void)
  23 {
  24         /* This is generated at compile-time by the build system */
  25         static const enum rte_cpu_flag_t compile_time_flags[] = {
  26                         RTE_COMPILE_TIME_CPUFLAGS
  27         };
  28         unsigned count = RTE_DIM(compile_time_flags), i;
  29         int ret;
  30
  31         for (i = 0; i < count; i++) {
  32                 ret = rte_cpu_get_flag_enabled(compile_time_flags[i]);
  33
  34                 if (ret < 0) {
  35                         fprintf(stderr,
  36                                 "ERROR: CPU feature flag lookup failed with error %d\n",
  37                                 ret);
  38                         return 0;
  39                 }
  40                 if (!ret) {
  41                         fprintf(stderr,
  42                                 "ERROR: This system does not support \"%s\".\n"
  43                                 "Please check that RTE_MACHINE is set correctly.\n",
  44                                 rte_cpu_get_flag_name(compile_time_flags[i]));
  45                         return 0;
  46                 }
  47         }
  48
  49         return 1;
  50 }