hugetlb: arm64: add mte support

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Enable MTE support for hugetlb.

The MTE page flags will be set on the folio only.  When copying
hugetlb folio (for example, CoW), the tags for all subpages will be copied
when copying the first subpage.

When freeing hugetlb folio, the MTE flags will be cleared.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Yang Shi <yang@os.amperecomputing.com>
Link: https://lore.kernel.org/r/20241001225220.271178-1-yang@os.amperecomputing.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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This commit is contained in:

Yang Shi 2024-10-01 15:52:19 -07:00 • committed by Catalin Marinas

parent 9852d85ec9

commit 25c17c4b55

9 changed files with 159 additions and 8 deletions

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8

arch/arm64/include/asm/hugetlb.h

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3

arch/arm64/include/asm/mman.h

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67

arch/arm64/include/asm/mte.h

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6

arch/arm64/kernel/hibernate.c

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27

arch/arm64/kernel/mte.c

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16

arch/arm64/kvm/guest.c

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11

arch/arm64/kvm/mmu.c

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27

arch/arm64/mm/copypage.c

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2

fs/hugetlbfs/inode.c

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