[PATCH v3 3/3] arm64: Rename reserved values for CTR_EL0.L1Ip

Anshuman Khandual anshuman.khandual at arm.com
Mon Dec 4 18:04:28 PST 2023



On 12/4/23 20:06, Marc Zyngier wrote:
> We now have *two* values for CTR_EL0.L1Ip that are reserved.
> Which makes things a bit awkward. In order to lift the ambiguity,
> rename RESERVED (0b01) to RESERVED_AIVIVT, and VPIPT (0b00) to
> RESERVED_VPIPT.
> 
> This makes it clear which of these meant what, and I'm sure
> archeologists will find it useful...
> 
> Reviewed-by: Zenghui Yu <yuzenghui at huawei.com>
> Signed-off-by: Marc Zyngier <maz at kernel.org>

Reviewed-by: Anshuman Khandual <anshuman.khandual at arm.com>

> ---
>  arch/arm64/tools/sysreg | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg
> index 96cbeeab4eec..c5af75b23187 100644
> --- a/arch/arm64/tools/sysreg
> +++ b/arch/arm64/tools/sysreg
> @@ -2004,9 +2004,10 @@ Field	27:24	CWG
>  Field	23:20	ERG
>  Field	19:16	DminLine
>  Enum	15:14	L1Ip
> -	0b00	VPIPT
> +	# This was named as VPIPT in the ARM but now documented as reserved
> +	0b00	RESERVED_VPIPT
>  	# This is named as AIVIVT in the ARM but documented as reserved
> -	0b01	RESERVED
> +	0b01	RESERVED_AIVIVT
>  	0b10	VIPT
>  	0b11	PIPT
>  EndEnum



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