tools/perf/arch/x86/util/env.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include "linux/string.h"
   3 #include "util/env.h"
   4 #include "env.h"
   5
   6 bool x86__is_amd_cpu(void)
   7 {
   8         struct perf_env env = { .total_mem = 0, };
   9         static int is_amd; /* 0: Uninitialized, 1: Yes, -1: No */
  10
  11         if (is_amd)
  12                 goto ret;
  13
  14         perf_env__cpuid(&env);
  15         is_amd = env.cpuid && strstarts(env.cpuid, "AuthenticAMD") ? 1 : -1;
  16         perf_env__exit(&env);
  17 ret:
  18         return is_amd >= 1 ? true : false;
  19 }