[PATCH] arm64/mm: Add pte_rdonly() helper
David Hildenbrand
david at redhat.com
Thu Jul 13 05:17:13 PDT 2023
On 13.07.23 11:20, Anshuman Khandual wrote:
> This replaces open coding PTE_RDONLY check with a new helper pte_rdonly().
> No functional change is intended here.
>
> Cc: Catalin Marinas <catalin.marinas at arm.com>
> Cc: Will Deacon <will at kernel.org>
> Cc: Mark Rutland <mark.rutland at arm.com>
> Cc: linux-arm-kernel at lists.infradead.org
> Cc: linux-kernel at vger.kernel.org
> Signed-off-by: Anshuman Khandual <anshuman.khandual at arm.com>
> ---
> This applies on v6.5-rc1
>
> arch/arm64/include/asm/pgtable.h | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
> index 171d6d7f8087..72c2e8431360 100644
> --- a/arch/arm64/include/asm/pgtable.h
> +++ b/arch/arm64/include/asm/pgtable.h
> @@ -103,6 +103,7 @@ static inline pteval_t __phys_to_pte_val(phys_addr_t phys)
> #define pte_young(pte) (!!(pte_val(pte) & PTE_AF))
> #define pte_special(pte) (!!(pte_val(pte) & PTE_SPECIAL))
> #define pte_write(pte) (!!(pte_val(pte) & PTE_WRITE))
> +#define pte_rdonly(pte) (!!(pte_val(pte) & PTE_RDONLY))
> #define pte_user(pte) (!!(pte_val(pte) & PTE_USER))
> #define pte_user_exec(pte) (!(pte_val(pte) & PTE_UXN))
> #define pte_cont(pte) (!!(pte_val(pte) & PTE_CONT))
> @@ -120,7 +121,7 @@ static inline pteval_t __phys_to_pte_val(phys_addr_t phys)
> (__boundary - 1 < (end) - 1) ? __boundary : (end); \
> })
>
> -#define pte_hw_dirty(pte) (pte_write(pte) && !(pte_val(pte) & PTE_RDONLY))
> +#define pte_hw_dirty(pte) (pte_write(pte) && !pte_rdonly(pte))
> #define pte_sw_dirty(pte) (!!(pte_val(pte) & PTE_DIRTY))
> #define pte_dirty(pte) (pte_sw_dirty(pte) || pte_hw_dirty(pte))
>
Reviewed-by: David Hildenbrand <david at redhat.com>
--
Cheers,
David / dhildenb
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