4beba9486a
For arm64 MTE support it is necessary to be able to mark pages that contain user space visible tags that will need to be saved/restored e.g. when swapped out. To support this add a new arch specific flag (PG_arch_2). This flag is only available on 64-bit architectures due to the limited number of spare page flags on the 32-bit ones. Signed-off-by: Steven Price <steven.price@arm.com> [catalin.marinas@arm.com: use CONFIG_64BIT for guarding this new flag] Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Andrew Morton <akpm@linux-foundation.org>
23 lines
528 B
C
23 lines
528 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef LINUX_KERNEL_PAGE_FLAGS_H
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#define LINUX_KERNEL_PAGE_FLAGS_H
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#include <uapi/linux/kernel-page-flags.h>
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/* kernel hacking assistances
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* WARNING: subject to change, never rely on them!
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*/
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#define KPF_RESERVED 32
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#define KPF_MLOCKED 33
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#define KPF_MAPPEDTODISK 34
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#define KPF_PRIVATE 35
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#define KPF_PRIVATE_2 36
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#define KPF_OWNER_PRIVATE 37
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#define KPF_ARCH 38
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#define KPF_UNCACHED 39
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#define KPF_SOFTDIRTY 40
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#define KPF_ARCH_2 41
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#endif /* LINUX_KERNEL_PAGE_FLAGS_H */
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