1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __ASM_POWERPC_CPU_HAS_FEATURE_H
 3#define __ASM_POWERPC_CPU_HAS_FEATURE_H
 4
 5#ifndef __ASSEMBLY__
 6
 7#include <linux/bug.h>
 8#include <asm/cputable.h>
 9
10static __always_inline bool early_cpu_has_feature(unsigned long feature)
11{
12	return !!((CPU_FTRS_ALWAYS & feature) ||
13		  (CPU_FTRS_POSSIBLE & cur_cpu_spec->cpu_features & feature));
14}
15
16#ifdef CONFIG_JUMP_LABEL_FEATURE_CHECKS
17#include <linux/jump_label.h>
18
19#define NUM_CPU_FTR_KEYS	BITS_PER_LONG
20
21extern struct static_key_true cpu_feature_keys[NUM_CPU_FTR_KEYS];
22
23static __always_inline bool cpu_has_feature(unsigned long feature)
24{
25	int i;
26
27#ifndef __clang__ /* clang can't cope with this */
28	BUILD_BUG_ON(!__builtin_constant_p(feature));
29#endif
30
31#ifdef CONFIG_JUMP_LABEL_FEATURE_CHECK_DEBUG
32	if (!static_key_initialized) {
33		printk("Warning! cpu_has_feature() used prior to jump label init!\n");
34		dump_stack();
35		return early_cpu_has_feature(feature);
36	}
37#endif
38
39	if (CPU_FTRS_ALWAYS & feature)
40		return true;
41
42	if (!(CPU_FTRS_POSSIBLE & feature))
43		return false;
44
45	i = __builtin_ctzl(feature);
46	return static_branch_likely(&cpu_feature_keys[i]);
47}
48#else
49static __always_inline bool cpu_has_feature(unsigned long feature)
50{
51	return early_cpu_has_feature(feature);
52}
53#endif
54
55#endif /* __ASSEMBLY__ */
56#endif /* __ASM_POWERPC_CPU_HAS_FEATURE_H */

 1#ifndef __ASM_POWERPC_CPUFEATURES_H
 2#define __ASM_POWERPC_CPUFEATURES_H
 
 3
 4#ifndef __ASSEMBLY__
 5
 6#include <linux/bug.h>
 7#include <asm/cputable.h>
 8
 9static inline bool early_cpu_has_feature(unsigned long feature)
10{
11	return !!((CPU_FTRS_ALWAYS & feature) ||
12		  (CPU_FTRS_POSSIBLE & cur_cpu_spec->cpu_features & feature));
13}
14
15#ifdef CONFIG_JUMP_LABEL_FEATURE_CHECKS
16#include <linux/jump_label.h>
17
18#define NUM_CPU_FTR_KEYS	BITS_PER_LONG
19
20extern struct static_key_true cpu_feature_keys[NUM_CPU_FTR_KEYS];
21
22static __always_inline bool cpu_has_feature(unsigned long feature)
23{
24	int i;
25
26#ifndef __clang__ /* clang can't cope with this */
27	BUILD_BUG_ON(!__builtin_constant_p(feature));
28#endif
29
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");
33		dump_stack();
34		return early_cpu_has_feature(feature);
35	}
36#endif
37
38	if (CPU_FTRS_ALWAYS & feature)
39		return true;
40
41	if (!(CPU_FTRS_POSSIBLE & feature))
42		return false;
43
44	i = __builtin_ctzl(feature);
45	return static_branch_likely(&cpu_feature_keys[i]);
46}
47#else
48static inline bool cpu_has_feature(unsigned long feature)
49{
50	return early_cpu_has_feature(feature);
51}
52#endif
53
54#endif /* __ASSEMBLY__ */
55#endif /* __ASM_POWERPC_CPUFEATURE_H */