Re: [PATCH v6 10/18] arm64/mm: New ptep layer to manage contig bit

Catalin Marinas
2024-02-15T19:21:36Z

On Thu, Feb 15, 2024 at 10:31:57AM +0000, Ryan Roberts wrote:
> Create a new layer for the in-table PTE manipulation APIs. For now, The
> existing API is prefixed with double underscore to become the
> arch-private API and the public API is just a simple wrapper that calls
> the private API.
>
> The public API implementation will subsequently be used to transparently
> manipulate the contiguous bit where appropriate. But since there are
> already some contig-aware users (e.g. hugetlb, kernel mapper), we must
> first ensure those users use the private API directly so that the future
> contig-bit manipulations in the public API do not interfere with those
> existing uses.
>
> The following APIs are treated this way:
>
> - ptep_get
> - set_pte
> - set_ptes
> - pte_clear
> - ptep_get_and_clear
> - ptep_test_and_clear_young
> - ptep_clear_flush_young
> - ptep_set_wrprotect
> - ptep_set_access_flags
>
> Tested-by: John Hubbard <jhubbard@nvidia.com>
> Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>

Acked-by: Catalin Marinas <catalin.marinas@arm.com>