arm64: Add HAVE_IOREMAP_PROT support

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With ioremap_prot() definition from generic ioremap, also move
pte_pgprot() from hugetlbpage.c into pgtable.h, then arm64 could
have HAVE_IOREMAP_PROT, which will enable generic_access_phys()
code, it is useful for debug, eg, gdb.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Link: https://lore.kernel.org/r/20220607125027.44946-7-wangkefeng.wang@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>

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Kefeng Wang 2022-06-07 20:50:27 +08:00 • committed by Will Deacon

parent f23eab0bfa

commit 893dea9ccd

4 changed files with 12 additions and 11 deletions

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2

Documentation/features/vm/ioremap_prot/arch-support.txt

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1

arch/arm64/Kconfig

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10

arch/arm64/include/asm/pgtable.h

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10

arch/arm64/mm/hugetlbpage.c

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