1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #ifndef __ASM_CPUCAPS_H
4 #define __ASM_CPUCAPS_H
5
6 #include <asm/cpucap-defs.h>
7
8 #ifndef __ASSEMBLY__
9 #include <linux/types.h>
10 /*
11 * Check whether a cpucap is possible at compiletime.
12 */
13 static __always_inline bool
14 cpucap_is_possible(const unsigned int cap)
15 {
16 compiletime_assert(__builtin_constant_p(cap),
17 "cap must be a constant");
18 compiletime_assert(cap < ARM64_NCAPS,
19 "cap must be < ARM64_NCAPS");
20
21 switch (cap) {
22 case ARM64_HAS_PAN:
23 return IS_ENABLED(CONFIG_ARM64_PAN);
24 case ARM64_HAS_EPAN:
25 return IS_ENABLED(CONFIG_ARM64_EPAN);
26 case ARM64_SVE:
27 return IS_ENABLED(CONFIG_ARM64_SVE);
28 case ARM64_SME:
29 case ARM64_SME2:
30 case ARM64_SME_FA64:
31 return IS_ENABLED(CONFIG_ARM64_SME);
32 case ARM64_HAS_CNP:
33 return IS_ENABLED(CONFIG_ARM64_CNP);
34 case ARM64_HAS_ADDRESS_AUTH:
35 case ARM64_HAS_GENERIC_AUTH:
36 return IS_ENABLED(CONFIG_ARM64_PTR_AUTH);
37 case ARM64_HAS_GIC_PRIO_MASKING:
38 return IS_ENABLED(CONFIG_ARM64_PSEUDO_NMI);
39 case ARM64_MTE:
40 return IS_ENABLED(CONFIG_ARM64_MTE);
41 case ARM64_BTI:
42 return IS_ENABLED(CONFIG_ARM64_BTI);
43 case ARM64_HAS_TLB_RANGE:
44 return IS_ENABLED(CONFIG_ARM64_TLB_RANGE);
45 case ARM64_UNMAP_KERNEL_AT_EL0:
46 return IS_ENABLED(CONFIG_UNMAP_KERNEL_AT_EL0);
47 case ARM64_WORKAROUND_843419:
48 return IS_ENABLED(CONFIG_ARM64_ERRATUM_843419);
49 case ARM64_WORKAROUND_1742098:
50 return IS_ENABLED(CONFIG_ARM64_ERRATUM_1742098);
51 case ARM64_WORKAROUND_2645198:
52 return IS_ENABLED(CONFIG_ARM64_ERRATUM_2645198);
53 case ARM64_WORKAROUND_2658417:
54 return IS_ENABLED(CONFIG_ARM64_ERRATUM_2658417);
55 case ARM64_WORKAROUND_CAVIUM_23154:
56 return IS_ENABLED(CONFIG_CAVIUM_ERRATUM_23154);
57 case ARM64_WORKAROUND_NVIDIA_CARMEL_CNP:
58 return IS_ENABLED(CONFIG_NVIDIA_CARMEL_CNP_ERRATUM);
59 case ARM64_WORKAROUND_REPEAT_TLBI:
60 return IS_ENABLED(CONFIG_ARM64_WORKAROUND_REPEAT_TLBI);
61 case ARM64_WORKAROUND_SPECULATIVE_SSBS:
62 return IS_ENABLED(CONFIG_ARM64_ERRATUM_3194386);
63 }
64
65 return true;
66 }
67 #endif /* __ASSEMBLY__ */
68
69 #endif /* __ASM_CPUCAPS_H */
70
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