tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
46#define MT_ALIGN_GRANULE (MT_GRANULE_SIZE - 1)
47#define MT_CLEAR_TAG(x) ((x) & ~(MT_TAG_MASK << MT_TAG_SHIFT))
48#define MT_SET_TAG(x, y) ((x) | (y << MT_TAG_SHIFT))
49#define MT_FETCH_TAG(x) ((x >> MT_TAG_SHIFT) & (MT_TAG_MASK))
50#define MT_ALIGN_UP(x) ((x + MT_ALIGN_GRANULE) & ~(MT_ALIGN_GRANULE))
51
52#define MT_PSTATE_TCO_SHIFT 25
53#define MT_PSTATE_TCO_MASK ~(0x1 << MT_PSTATE_TCO_SHIFT)
54#define MT_PSTATE_TCO_EN 1
55#define MT_PSTATE_TCO_DIS 0
56
57#define MT_EXCLUDE_TAG(x) (1 << (x))
58#define MT_INCLUDE_VALID_TAG(x) (MT_INCLUDE_TAG_MASK ^ MT_EXCLUDE_TAG(x))
59#define MT_INCLUDE_VALID_TAGS(x) (MT_INCLUDE_TAG_MASK ^ (x))
60#define MTE_ALLOW_NON_ZERO_TAG MT_INCLUDE_VALID_TAG(0)