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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/tools/testing/selftests/arm64/mte/mte_def.h
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/* SPDX-License-Identifier: GPL-2.0 */

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/* Copyright (C) 2020 ARM Limited */

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/*

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 * Below definitions may be found in kernel headers, However, they are

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 * redefined here to decouple the MTE selftests compilations from them.

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 */

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#ifndef SEGV_MTEAERR

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#define	SEGV_MTEAERR	8

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#endif

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#ifndef SEGV_MTESERR

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#define	SEGV_MTESERR	9

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#endif

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#ifndef PROT_MTE

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#define PROT_MTE	 0x20

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#endif

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#ifndef HWCAP2_MTE

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#define HWCAP2_MTE	(1 << 18)

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#endif

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#ifndef PR_MTE_TCF_SHIFT

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#define PR_MTE_TCF_SHIFT	1

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#endif

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#ifndef PR_MTE_TCF_NONE

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#define PR_MTE_TCF_NONE		(0UL << PR_MTE_TCF_SHIFT)

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#endif

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#ifndef PR_MTE_TCF_SYNC

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#define	PR_MTE_TCF_SYNC		(1UL << PR_MTE_TCF_SHIFT)

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#endif

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#ifndef PR_MTE_TCF_ASYNC

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#define PR_MTE_TCF_ASYNC	(2UL << PR_MTE_TCF_SHIFT)

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#endif

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#ifndef PR_MTE_TAG_SHIFT

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#define	PR_MTE_TAG_SHIFT	3

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#endif

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/* MTE Hardware feature definitions below. */

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#define MT_TAG_SHIFT		56

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#define MT_TAG_MASK		0xFUL

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#define MT_FREE_TAG		0x0UL

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#define MT_GRANULE_SIZE         16

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#define MT_TAG_COUNT		16

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#define MT_INCLUDE_TAG_MASK	0xFFFF

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#define MT_EXCLUDE_TAG_MASK	0x0

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#define MT_ATAG_SHIFT		60

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#define MT_ATAG_MASK		0xFUL

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#define MT_ALIGN_GRANULE	(MT_GRANULE_SIZE - 1)

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#define MT_CLEAR_TAG(x)		((x) & ~(MT_TAG_MASK << MT_TAG_SHIFT))

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#define MT_SET_TAG(x, y)	((x) | (y << MT_TAG_SHIFT))

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#define MT_FETCH_TAG(x)		((x >> MT_TAG_SHIFT) & (MT_TAG_MASK))

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#define MT_ALIGN_UP(x)		((x + MT_ALIGN_GRANULE) & ~(MT_ALIGN_GRANULE))

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#define MT_CLEAR_ATAG(x)	((x) & ~(MT_TAG_MASK << MT_ATAG_SHIFT))

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#define MT_SET_ATAG(x, y)	((x) | (((y) & MT_ATAG_MASK) << MT_ATAG_SHIFT))

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#define MT_FETCH_ATAG(x)	((x >> MT_ATAG_SHIFT) & (MT_ATAG_MASK))

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#define MT_CLEAR_TAGS(x) 	(MT_CLEAR_ATAG(MT_CLEAR_TAG(x)))

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#define MT_PSTATE_TCO_SHIFT	25

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#define MT_PSTATE_TCO_MASK	~(0x1 << MT_PSTATE_TCO_SHIFT)

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#define MT_PSTATE_TCO_EN	1

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#define MT_PSTATE_TCO_DIS	0

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#define MT_EXCLUDE_TAG(x)		(1 << (x))

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#define MT_INCLUDE_VALID_TAG(x)		(MT_INCLUDE_TAG_MASK ^ MT_EXCLUDE_TAG(x))

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#define MT_INCLUDE_VALID_TAGS(x)	(MT_INCLUDE_TAG_MASK ^ (x))

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#define MTE_ALLOW_NON_ZERO_TAG		MT_INCLUDE_VALID_TAG(0)

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