| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Copyright (C) 2023 Arm Ltd. |
| */ |
| |
| #ifndef _ASM_ARM64_POR_H |
| #define _ASM_ARM64_POR_H |
| |
| #define POR_BITS_PER_PKEY 4 |
| #define POR_ELx_IDX(por_elx, idx) (((por_elx) >> ((idx) * POR_BITS_PER_PKEY)) & 0xf) |
| |
| static inline bool por_elx_allows_read(u64 por, u8 pkey) |
| { |
| u8 perm = POR_ELx_IDX(por, pkey); |
| |
| return perm & POE_R; |
| } |
| |
| static inline bool por_elx_allows_write(u64 por, u8 pkey) |
| { |
| u8 perm = POR_ELx_IDX(por, pkey); |
| |
| return perm & POE_W; |
| } |
| |
| static inline bool por_elx_allows_exec(u64 por, u8 pkey) |
| { |
| u8 perm = POR_ELx_IDX(por, pkey); |
| |
| return perm & POE_X; |
| } |
| |
| #endif /* _ASM_ARM64_POR_H */ |
