linux-kernel - Re: [PATCH V2 15/46] arm64/sysreg: Add register fields for PFAR

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Message-ID: <5203176c-2646-425b-b375-edb7931ef54f@redhat.com>
Date: Wed, 18 Dec 2024 16:42:58 +0100
From: Eric Auger <eauger@...hat.com>
To: Anshuman Khandual <anshuman.khandual@....com>,
 linux-kernel@...r.kernel.org, kvmarm@...ts.linux.dev,
 linux-arm-kernel@...ts.infradead.org, maz@...nel.org
Cc: ryan.roberts@....com, Oliver Upton <oliver.upton@...ux.dev>,
 James Morse <james.morse@....com>, Suzuki K Poulose
 <suzuki.poulose@....com>, Catalin Marinas <catalin.marinas@....com>,
 Will Deacon <will@...nel.org>, Mark Brown <broonie@...nel.org>
Subject: Re: [PATCH V2 15/46] arm64/sysreg: Add register fields for PFAR_EL1

Hi Anshuman,

On 12/10/24 06:52, Anshuman Khandual wrote:
> This adds register fields for PFAR_EL1 as per the definitions based on
> DDI0601 2024-09.
> 
> Cc: Catalin Marinas <catalin.marinas@....com>
> Cc: Will Deacon <will@...nel.org>
> Cc: Mark Brown <broonie@...nel.org>
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: linux-kernel@...r.kernel.org
> Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
> ---
>  arch/arm64/tools/sysreg | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg
> index 18b814ff2c41..e33edb41721a 100644
> --- a/arch/arm64/tools/sysreg
> +++ b/arch/arm64/tools/sysreg
> @@ -3533,3 +3533,10 @@ Field	5	F
>  Field	4	P
>  Field	3:0	Align
>  EndSysreg
> +
> +Sysreg	PFAR_EL1	3	0	6	0	5
> +Field	63	NS
> +Field	62	NSE
> +Res0	61:56
> +Field	55:0	PA
Just wondering: part of the PA definition depends on FEAT_D128 or
FEAT_LPA and the reset field value is UNKNOWN if the feature is not
available. Shouldn't introduce separate fields directly?

Eric
> +EndSysreg