1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (C) 2023 Arm Ltd.
4 */
5
6 #ifndef _ASM_ARM64_POR_H
7 #define _ASM_ARM64_POR_H
8
9 #define POR_BITS_PER_PKEY 4
10 #define POR_ELx_IDX(por_elx, idx) (((por_elx) >> ((idx) * POR_BITS_PER_PKEY)) & 0xf)
11
12 static inline bool por_elx_allows_read(u64 por, u8 pkey)
13 {
14 u8 perm = POR_ELx_IDX(por, pkey);
15
16 return perm & POE_R;
17 }
18
19 static inline bool por_elx_allows_write(u64 por, u8 pkey)
20 {
21 u8 perm = POR_ELx_IDX(por, pkey);
22
23 return perm & POE_W;
24 }
25
26 static inline bool por_elx_allows_exec(u64 por, u8 pkey)
27 {
28 u8 perm = POR_ELx_IDX(por, pkey);
29
30 return perm & POE_X;
31 }
32
33 #endif /* _ASM_ARM64_POR_H */
34
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