| Alastair D'Silva | 4a12027 | 2016-07-19 14:03:52 +1000 | [diff] [blame] | 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 */ |