arm64: mm: Wire up TCR.DS bit to PTE shareability fields

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When LPA2 is enabled, bits 8 and 9 of page and block descriptors become
part of the output address instead of carrying shareability attributes
for the region in question.

So avoid setting these bits if TCR.DS == 1, which means LPA2 is enabled.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20240214122845.2033971-74-ardb+git@google.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Ard Biesheuvel 2024-02-14 13:29:15 +01:00 • committed by Catalin Marinas

parent 7ac8d5b242

commit db95ea787b

5 changed files with 25 additions and 2 deletions

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4

arch/arm64/Kconfig

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1

arch/arm64/include/asm/pgtable-hwdef.h

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16

arch/arm64/include/asm/pgtable-prot.h

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4

arch/arm64/mm/mmap.c

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arch/arm64/mm/proc.S

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