Re: [Xen-devel] [PATCH MM-PART2 RESEND v2 03/19] xen/arm: processor: Use BIT(.., UL) instead of _AC(1, U) in SCTLR_ defines

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Tue, 14 May 2019, Julien Grall wrote:
> Use the pattern BIT(..., UL) to make the code more readable. Note that
> unsigned long is used instead of unsigned because SCTLR is technically
> 32-bit on Arm32 and 64-bit on Arm64.
> 
> Signed-off-by: Julien Grall <julien.grall@xxxxxxx>

Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>

> ---
>     Changes in v2:
>         - Rework the patch to use BIT(..., UL) instead of _BITUL(...).
> ---
>  xen/include/asm-arm/processor.h | 18 +++++++++---------
>  1 file changed, 9 insertions(+), 9 deletions(-)
> 
> diff --git a/xen/include/asm-arm/processor.h b/xen/include/asm-arm/processor.h
> index f3b68185eb..bbcba061ca 100644
> --- a/xen/include/asm-arm/processor.h
> +++ b/xen/include/asm-arm/processor.h
> @@ -120,20 +120,20 @@
>  
>  /* Bits specific to SCTLR_EL1 for Arm32 */
>  
> -#define SCTLR_A32_EL1_V     (_AC(1,U)<<13)
> +#define SCTLR_A32_EL1_V     BIT(13, UL)
>  
>  /* Common bits for SCTLR_ELx for Arm32 */
>  
> -#define SCTLR_A32_ELx_TE    (_AC(1,U)<<30)
> -#define SCTLR_A32_ELx_FI    (_AC(1,U)<<21)
> +#define SCTLR_A32_ELx_TE    BIT(30, UL)
> +#define SCTLR_A32_ELx_FI    BIT(21, UL)
>  
>  /* Common bits for SCTLR_ELx on all architectures */
> -#define SCTLR_Axx_ELx_EE    (_AC(1,U)<<25)
> -#define SCTLR_Axx_ELx_WXN   (_AC(1,U)<<19)
> -#define SCTLR_Axx_ELx_I     (_AC(1,U)<<12)
> -#define SCTLR_Axx_ELx_C     (_AC(1,U)<<2)
> -#define SCTLR_Axx_ELx_A     (_AC(1,U)<<1)
> -#define SCTLR_Axx_ELx_M     (_AC(1,U)<<0)
> +#define SCTLR_Axx_ELx_EE    BIT(25, UL)
> +#define SCTLR_Axx_ELx_WXN   BIT(19, UL)
> +#define SCTLR_Axx_ELx_I     BIT(12, UL)
> +#define SCTLR_Axx_ELx_C     BIT(2, UL)
> +#define SCTLR_Axx_ELx_A     BIT(1, UL)
> +#define SCTLR_Axx_ELx_M     BIT(0, UL)
>  
>  #define HSCTLR_BASE     _AC(0x30c51878,U)
>  
> -- 
> 2.11.0
> 

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