LXR linux/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
  32static 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 */
  41