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Linux/arch/powerpc/include/asm/cpufeature.h

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  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 */
 41 

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