linux-kernel - Re: [PATCH 01/10] arm64: sysreg: Add new PMSIDR_EL1 and PMSFCR

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Message-ID: <8634d4fwnb.wl-maz@kernel.org>
Date: Fri, 16 May 2025 15:38:48 +0100
From: Marc Zyngier <maz@...nel.org>
To: James Clark <james.clark@...aro.org>
Cc: Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Jonathan Corbet <corbet@....net>,
	Oliver Upton <oliver.upton@...ux.dev>,
	Joey Gouly <joey.gouly@....com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Zenghui Yu <yuzenghui@...wei.com>,
	leo.yan@....com,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-perf-users@...r.kernel.org,
	linux-doc@...r.kernel.org,
	kvmarm@...ts.linux.dev
Subject: Re: [PATCH 01/10] arm64: sysreg: Add new PMSIDR_EL1 and PMSFCR_EL1 fields

On Tue, 06 May 2025 12:41:33 +0100,
James Clark <james.clark@...aro.org> wrote:
> 
> Add new fields and registers that are introduced for the features
> FEAT_SPE_CRR (call return records), FEAT_SPE_EFT (extended filtering),
> FEAT_SPE_FPF (floating point flag), FEAT_SPE_FDS (data source
> filtering), FEAT_SPE_ALTCLK and FEAT_SPE_SME.
>
> Signed-off-by: James Clark <james.clark@...aro.org>
> ---
>  arch/arm64/tools/sysreg | 26 ++++++++++++++++++++++----
>  1 file changed, 22 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg
> index bdf044c5d11b..80d57c83a5f5 100644
> --- a/arch/arm64/tools/sysreg
> +++ b/arch/arm64/tools/sysreg
> @@ -2205,11 +2205,20 @@ Field	0	RND
>  EndSysreg
>  
>  Sysreg	PMSFCR_EL1	3	0	9	9	4
> -Res0	63:19
> +Res0	63:53
> +Field	52	SIMDm
> +Field	51	FPm
> +Field	50	STm
> +Field	49	LDm
> +Field	48	Bm
> +Res0	47:21
> +Field	20	SIMD
> +Field	19	FP
>  Field	18	ST
>  Field	17	LD
>  Field	16	B
> -Res0	15:4
> +Res0	15:5
> +Field	4	FDS
>  Field	3	FnE
>  Field	2	FL
>  Field	1	FT
> @@ -2226,7 +2235,12 @@ Field	15:0	MINLAT
>  EndSysreg
>  
>  Sysreg	PMSIDR_EL1	3	0	9	9	7
> -Res0	63:25
> +Res0	63:33
> +Field	32	SME
> +Field	31:28	ALTCLK
> +Field	27	FPF
> +Field	26	EFT
> +Field	25	CRR

These are described as enumerations in the JSON file (see [1]).

	M.

[1] https://lore.kernel.org/all/20250506164348.346001-7-maz@kernel.org

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