[PATCH v4 11/29] arm64: re-order MTE VM_ flags
Anshuman Khandual
anshuman.khandual at arm.com
Mon Jul 15 19:21:54 AEST 2024
On 5/3/24 18:31, Joey Gouly wrote:
> To make it easier to share the generic PKEYs flags, move the MTE flag.
The change looks good but too less details about it here. Please do consider
adding some more description, on how moving the VM flags down the arch range
helps going forward.
>
> Signed-off-by: Joey Gouly <joey.gouly at arm.com>
> Cc: Catalin Marinas <catalin.marinas at arm.com>
> Cc: Will Deacon <will at kernel.org>
> ---
> include/linux/mm.h | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index 5605b938acce..2065727b3787 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -377,8 +377,8 @@ extern unsigned int kobjsize(const void *objp);
> #endif
>
> #if defined(CONFIG_ARM64_MTE)
> -# define VM_MTE VM_HIGH_ARCH_0 /* Use Tagged memory for access control */
> -# define VM_MTE_ALLOWED VM_HIGH_ARCH_1 /* Tagged memory permitted */
> +# define VM_MTE VM_HIGH_ARCH_4 /* Use Tagged memory for access control */
> +# define VM_MTE_ALLOWED VM_HIGH_ARCH_5 /* Tagged memory permitted */
> #else
> # define VM_MTE VM_NONE
> # define VM_MTE_ALLOWED VM_NONE
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