1 #ifndef __ASM_POWERPC_CPUFEATURES_H
2 #define __ASM_POWERPC_CPUFEATURES_H
7 #include <asm/cputable.h>
9 static inline bool early_cpu_has_feature(unsigned long feature)
11 return !!((CPU_FTRS_ALWAYS & feature) ||
12 (CPU_FTRS_POSSIBLE & cur_cpu_spec->cpu_features & feature));
15 #ifdef CONFIG_JUMP_LABEL_FEATURE_CHECKS
16 #include <linux/jump_label.h>
18 #define NUM_CPU_FTR_KEYS BITS_PER_LONG
20 extern struct static_key_true cpu_feature_keys[NUM_CPU_FTR_KEYS];
22 static __always_inline bool cpu_has_feature(unsigned long feature)
26 #ifndef __clang__ /* clang can't cope with this */
27 BUILD_BUG_ON(!__builtin_constant_p(feature));
30 #ifdef CONFIG_JUMP_LABEL_FEATURE_CHECK_DEBUG
31 if (!static_key_initialized) {
32 printk("Warning! cpu_has_feature() used prior to jump label init!\n");
34 return early_cpu_has_feature(feature);
38 if (CPU_FTRS_ALWAYS & feature)
41 if (!(CPU_FTRS_POSSIBLE & feature))
44 i = __builtin_ctzl(feature);
45 return static_branch_likely(&cpu_feature_keys[i]);
48 static inline bool cpu_has_feature(unsigned long feature)
50 return early_cpu_has_feature(feature);
54 #endif /* __ASSEMBLY__ */
55 #endif /* __ASM_POWERPC_CPUFEATURE_H */