linux-kernel - Re: [PATCH] arm64/sysreg: Update ID_AA64DFR0_EL1 and ID_DFR0

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Date: Thu, 15 Feb 2024 13:00:38 +0000
From: Mark Brown <broonie@...nel.org>
To: Anshuman Khandual <anshuman.khandual@....com>
Cc: linux-arm-kernel@...ts.infradead.org,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64/sysreg: Update ID_AA64DFR0_EL1 and ID_DFR0_EL1

On Thu, Feb 15, 2024 at 11:21:59AM +0530, Anshuman Khandual wrote:

> This just updates ID_DFR0_EL1.CopDbg and ID_AA64DFR0_EL1.DebugVer register
> fields as per the definitions based on DDI0601 2023-12.

Just as a general note for non-trival registers it's easier to review if
we change one register per patch, it avoids having to re-review the same
registers repeatedly and for incremental changes like this it helps with
the fact that diff does badly at offering context.

> --- a/arch/arm64/tools/sysreg
> +++ b/arch/arm64/tools/sysreg
> @@ -231,6 +231,7 @@ Enum	3:0	CopDbg
>  	0b1000	Debugv8p2
>  	0b1001	Debugv8p4
>  	0b1010	Debugv8p8
> +	0b1011	Debugv8p9
>  EndEnum
>  EndSysreg

This is ID_AA64DFR0_EL1 and is missing at least an update to PMSVer.

>  
> @@ -1247,6 +1248,7 @@ UnsignedEnum	3:0	DebugVer
>  	0b1000	V8P2
>  	0b1001	V8P4
>  	0b1010	V8P8
> +	0b1011	V8P9
>  EndEnum
>  EndSysreg

This is ID_DFR0_EL1 and is missing an update to at least PerfMon.

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