arch/powerpc/include/asm/cpufeature.h

   1 /*
   2  * CPU feature definitions for module loading, used by
   3  * module_cpu_feature_match(), see asm/cputable.h for powerpc CPU features.
   4  *
   5  * Copyright 2016 Alastair D'Silva, IBM Corporation.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version
  10  * 2 of the License, or (at your option) any later version.
  11  */
  12
  13 #ifndef __ASM_POWERPC_CPUFEATURE_H
  14 #define __ASM_POWERPC_CPUFEATURE_H
  15
  16 #include <asm/cputable.h>
  17
  18 /* Keep these in step with powerpc/include/asm/cputable.h */
  19 #define MAX_CPU_FEATURES (2 * 32)
  20
  21 /*
  22  * Currently we don't have a need for any of the feature bits defined in
  23  * cpu_user_features. When we do, they should be defined such as:
  24  *
  25  * #define PPC_MODULE_FEATURE_32 (ilog2(PPC_FEATURE_32))
  26  */
  27
  28 #define PPC_MODULE_FEATURE_VEC_CRYPTO                   (32 + ilog2(PPC_FEATURE2_VEC_CRYPTO))
  29
  30 #define cpu_feature(x)          (x)
  31
  32 static inline bool cpu_have_feature(unsigned int num)
  33 {
  34         if (num < 32)
  35                 return !!(cur_cpu_spec->cpu_user_features & 1UL << num);
  36         else
  37                 return !!(cur_cpu_spec->cpu_user_features2 & 1UL << (num - 32));
  38 }
  39
  40 #endif /* __ASM_POWERPC_CPUFEATURE_H */