| #ifndef __ASM_POWERPC_CPUFEATURES_H |
| #define __ASM_POWERPC_CPUFEATURES_H |
| |
| #ifndef __ASSEMBLY__ |
| |
| #include <linux/bug.h> |
| #include <asm/cputable.h> |
| |
| static inline bool early_cpu_has_feature(unsigned long feature) |
| { |
| return !!((CPU_FTRS_ALWAYS & feature) || |
| (CPU_FTRS_POSSIBLE & cur_cpu_spec->cpu_features & feature)); |
| } |
| |
| #ifdef CONFIG_JUMP_LABEL_FEATURE_CHECKS |
| #include <linux/jump_label.h> |
| |
| #define NUM_CPU_FTR_KEYS 64 |
| |
| extern struct static_key_true cpu_feature_keys[NUM_CPU_FTR_KEYS]; |
| |
| static __always_inline bool cpu_has_feature(unsigned long feature) |
| { |
| int i; |
| |
| BUILD_BUG_ON(!__builtin_constant_p(feature)); |
| |
| #ifdef CONFIG_JUMP_LABEL_FEATURE_CHECK_DEBUG |
| if (!static_key_initialized) { |
| printk("Warning! cpu_has_feature() used prior to jump label init!\n"); |
| dump_stack(); |
| return early_cpu_has_feature(feature); |
| } |
| #endif |
| |
| if (CPU_FTRS_ALWAYS & feature) |
| return true; |
| |
| if (!(CPU_FTRS_POSSIBLE & feature)) |
| return false; |
| |
| i = __builtin_ctzl(feature); |
| return static_branch_likely(&cpu_feature_keys[i]); |
| } |
| #else |
| static inline bool cpu_has_feature(unsigned long feature) |
| { |
| return early_cpu_has_feature(feature); |
| } |
| #endif |
| |
| #endif /* __ASSEMBLY__ */ |
| #endif /* __ASM_POWERPC_CPUFEATURE_H */ |