1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Copyright (C) 2020 ARM Limited */ 3 4 /* 5 * Below definitions may be found in kernel headers, However, they are 6 * redefined here to decouple the MTE selftests compilations from them. 7 */ 8 #ifndef SEGV_MTEAERR 9 #define SEGV_MTEAERR 8 10 #endif 11 #ifndef SEGV_MTESERR 12 #define SEGV_MTESERR 9 13 #endif 14 #ifndef PROT_MTE 15 #define PROT_MTE 0x20 16 #endif 17 #ifndef HWCAP2_MTE 18 #define HWCAP2_MTE (1 << 18) 19 #endif 20 21 #ifndef PR_MTE_TCF_SHIFT 22 #define PR_MTE_TCF_SHIFT 1 23 #endif 24 #ifndef PR_MTE_TCF_NONE 25 #define PR_MTE_TCF_NONE (0UL << PR_MTE_TCF_SHIFT) 26 #endif 27 #ifndef PR_MTE_TCF_SYNC 28 #define PR_MTE_TCF_SYNC (1UL << PR_MTE_TCF_SHIFT) 29 #endif 30 #ifndef PR_MTE_TCF_ASYNC 31 #define PR_MTE_TCF_ASYNC (2UL << PR_MTE_TCF_SHIFT) 32 #endif 33 #ifndef PR_MTE_TAG_SHIFT 34 #define PR_MTE_TAG_SHIFT 3 35 #endif 36 37 /* MTE Hardware feature definitions below. */ 38 #define MT_TAG_SHIFT 56 39 #define MT_TAG_MASK 0xFUL 40 #define MT_FREE_TAG 0x0UL 41 #define MT_GRANULE_SIZE 16 42 #define MT_TAG_COUNT 16 43 #define MT_INCLUDE_TAG_MASK 0xFFFF 44 #define MT_EXCLUDE_TAG_MASK 0x0 45 #define MT_ATAG_SHIFT 60 46 #define MT_ATAG_MASK 0xFUL 47 48 #define MT_ALIGN_GRANULE (MT_GRANULE_SIZE - 1) 49 #define MT_CLEAR_TAG(x) ((x) & ~(MT_TAG_MASK << MT_TAG_SHIFT)) 50 #define MT_SET_TAG(x, y) ((x) | (y << MT_TAG_SHIFT)) 51 #define MT_FETCH_TAG(x) ((x >> MT_TAG_SHIFT) & (MT_TAG_MASK)) 52 #define MT_ALIGN_UP(x) ((x + MT_ALIGN_GRANULE) & ~(MT_ALIGN_GRANULE)) 53 54 #define MT_CLEAR_ATAG(x) ((x) & ~(MT_TAG_MASK << MT_ATAG_SHIFT)) 55 #define MT_SET_ATAG(x, y) ((x) | (((y) & MT_ATAG_MASK) << MT_ATAG_SHIFT)) 56 #define MT_FETCH_ATAG(x) ((x >> MT_ATAG_SHIFT) & (MT_ATAG_MASK)) 57 58 #define MT_CLEAR_TAGS(x) (MT_CLEAR_ATAG(MT_CLEAR_TAG(x))) 59 60 #define MT_PSTATE_TCO_SHIFT 25 61 #define MT_PSTATE_TCO_MASK ~(0x1 << MT_PSTATE_TCO_SHIFT) 62 #define MT_PSTATE_TCO_EN 1 63 #define MT_PSTATE_TCO_DIS 0 64 65 #define MT_EXCLUDE_TAG(x) (1 << (x)) 66 #define MT_INCLUDE_VALID_TAG(x) (MT_INCLUDE_TAG_MASK ^ MT_EXCLUDE_TAG(x)) 67 #define MT_INCLUDE_VALID_TAGS(x) (MT_INCLUDE_TAG_MASK ^ (x)) 68 #define MTE_ALLOW_NON_ZERO_TAG MT_INCLUDE_VALID_TAG(0) 69