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Subject: Re: [PATCH 6/6] arm64: enable a distinct type for HW PTEs
To: Muhammad Usama Anjum <usama.anjum@arm.com>,
 Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>,
 Mark Rutland <mark.rutland@arm.com>, Ard Biesheuvel <ardb@kernel.org>,
 Ilias Apalodimas <ilias.apalodimas@linaro.org>,
 Andrey Ryabinin <ryabinin.a.a@gmail.com>,
 Alexander Potapenko <glider@google.com>,
 Andrey Konovalov <andreyknvl@gmail.com>, Dmitry Vyukov <dvyukov@google.com>,
 Vincenzo Frascino <vincenzo.frascino@arm.com>,
 Andrew Morton <akpm@linux-foundation.org>,
 David Hildenbrand <david@kernel.org>, Lorenzo Stoakes <ljs@kernel.org>,
 "Liam R. Howlett" <liam@infradead.org>, Vlastimil Babka <vbabka@kernel.org>,
 Mike Rapoport <rppt@kernel.org>, Suren Baghdasaryan <surenb@google.com>,
 Michal Hocko <mhocko@suse.com>
Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
 linux-efi@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org
References: <20260914-pte0_arm-v1-0-bb53b663e396@arm.com>
 <20260914-pte0_arm-v1-6-bb53b663e396@arm.com>
From: Ryan Roberts <ryan.roberts@arm.com>
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In-Reply-To: <20260914-pte0_arm-v1-6-bb53b663e396@arm.com>
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On 14/09/2026 14:51, Muhammad Usama Anjum wrote:
> With HW PTE pointers and direct HW PTE accesses converted, arm64 can use
> the generic hw_pte_t wrapper instead of the pte_t alias.
> 
> Select ARCH_HAS_HW_PTE_T to give HW PTEs and SW PTE values distinct C
> types.
> 
> Signed-off-by: Muhammad Usama Anjum <usama.anjum@arm.com>

Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>

> ---
>  arch/arm64/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 2bbeded33da0d..42841d5e2ed26 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -31,6 +31,7 @@ config ARM64
>  	select ARCH_HAS_FORTIFY_SOURCE
>  	select ARCH_HAS_GCOV_PROFILE_ALL
>  	select ARCH_HAS_GIGANTIC_PAGE
> +	select ARCH_HAS_HW_PTE_T
>  	select ARCH_HAS_KCOV
>  	select ARCH_HAS_KERNEL_FPU_SUPPORT if KERNEL_MODE_NEON
>  	select ARCH_HAS_KEEPINITRD
>