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 64
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 BUILD_BUG_ON(!__builtin_constant_p(feature
));
28 #ifdef CONFIG_JUMP_LABEL_FEATURE_CHECK_DEBUG
29 if (!static_key_initialized
) {
30 printk("Warning! cpu_has_feature() used prior to jump label init!\n");
32 return early_cpu_has_feature(feature
);
36 if (CPU_FTRS_ALWAYS
& feature
)
39 if (!(CPU_FTRS_POSSIBLE
& feature
))
42 i
= __builtin_ctzl(feature
);
43 return static_branch_likely(&cpu_feature_keys
[i
]);
46 static inline bool cpu_has_feature(unsigned long feature
)
48 return early_cpu_has_feature(feature
);
52 #endif /* __ASSEMBLY__ */
53 #endif /* __ASM_POWERPC_CPUFEATURE_H */