[PATCH v4 12/29] arm64: add POIndex defines

[Anshuman Khandual]

On 5/3/24 18:31, Joey Gouly wrote:
> The 3-bit POIndex is stored in the PTE at bits 60..62.
> 
> 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>
> ---
>  arch/arm64/include/asm/pgtable-hwdef.h | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
> index ef207a0d4f0d..370a02922fe1 100644
> --- a/arch/arm64/include/asm/pgtable-hwdef.h
> +++ b/arch/arm64/include/asm/pgtable-hwdef.h
> @@ -198,6 +198,16 @@
>  #define PTE_PI_IDX_2	53	/* PXN */
>  #define PTE_PI_IDX_3	54	/* UXN */
>  
> +/*
> + * POIndex[2:0] encoding (Permission Overlay Extension)
> + */
> +#define PTE_PO_IDX_0	(_AT(pteval_t, 1) << 60)
> +#define PTE_PO_IDX_1	(_AT(pteval_t, 1) << 61)
> +#define PTE_PO_IDX_2	(_AT(pteval_t, 1) << 62)
> +
> +#define PTE_PO_IDX_MASK		GENMASK_ULL(62, 60)
> +
> +
>  /*
>   * Memory Attribute override for Stage-2 (MemAttr[3:0])
>   */

Could this patch be folded with a later patch that uses the above indices
and the mask for the first time.