arch/powerpc/include/asm/cpufeature.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * CPU feature definitions for module loading, used by
   4  * module_cpu_feature_match(), see asm/cputable.h for powerpc CPU features.
   5  *
   6  * Copyright 2016 Alastair D'Silva, IBM Corporation.
   7  */
   8
   9 #ifndef __ASM_POWERPC_CPUFEATURE_H
  10 #define __ASM_POWERPC_CPUFEATURE_H
  11
  12 #include <asm/cputable.h>
  13
  14 /* Keep these in step with powerpc/include/asm/cputable.h */
  15 #define MAX_CPU_FEATURES (2 * 32)
  16
  17 /*
  18  * Currently we don't have a need for any of the feature bits defined in
  19  * cpu_user_features. When we do, they should be defined such as:
  20  *
  21  * #define PPC_MODULE_FEATURE_32 (ilog2(PPC_FEATURE_32))
  22  */
  23
  24 #define PPC_MODULE_FEATURE_VEC_CRYPTO                   (32 + ilog2(PPC_FEATURE2_VEC_CRYPTO))
  25 #define PPC_MODULE_FEATURE_P10                          (32 + ilog2(PPC_FEATURE2_ARCH_3_1))
  26
  27 #define cpu_feature(x)          (x)
  28
  29 static inline bool cpu_have_feature(unsigned int num)
  30 {
  31         if (num < 32)
  32                 return !!(cur_cpu_spec->cpu_user_features & 1UL << num);
  33         else
  34                 return !!(cur_cpu_spec->cpu_user_features2 & 1UL << (num - 32));
  35 }
  36
  37 #endif /* __ASM_POWERPC_CPUFEATURE_H */