mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-27 21:03:32 +00:00
ab1e435ca7
Rather than explicitly calculating the number of bytes for a compact tag storage format corresponding to a page, just add a MTE_PAGE_TAG_STORAGE macro. With the current MTE implementation of 4 bits per tag, we store 2 tags in a byte. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Luis Machado <luis.machado@linaro.org> Link: https://lore.kernel.org/r/20220131165456.2160675-4-catalin.marinas@arm.com Signed-off-by: Will Deacon <will@kernel.org>
18 lines
577 B
C
18 lines
577 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 2020 ARM Ltd.
|
|
*/
|
|
#ifndef __ASM_MTE_DEF_H
|
|
#define __ASM_MTE_DEF_H
|
|
|
|
#define MTE_GRANULE_SIZE UL(16)
|
|
#define MTE_GRANULE_MASK (~(MTE_GRANULE_SIZE - 1))
|
|
#define MTE_GRANULES_PER_PAGE (PAGE_SIZE / MTE_GRANULE_SIZE)
|
|
#define MTE_TAG_SHIFT 56
|
|
#define MTE_TAG_SIZE 4
|
|
#define MTE_TAG_MASK GENMASK((MTE_TAG_SHIFT + (MTE_TAG_SIZE - 1)), MTE_TAG_SHIFT)
|
|
#define MTE_PAGE_TAG_STORAGE (MTE_GRANULES_PER_PAGE * MTE_TAG_SIZE / 8)
|
|
|
|
#define __MTE_PREAMBLE ARM64_ASM_PREAMBLE ".arch_extension memtag\n"
|
|
|
|
#endif /* __ASM_MTE_DEF_H */
|