linux-kernel - Re: [PATCH v1 1/3] arm64: Add Cortex-X4 CPU part definitions

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Message-ID: <d746ccf2-1982-38ca-ee0c-bd321becf4f3@arm.com>
Date:   Mon, 24 Jul 2023 12:14:31 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     Leo Yan <leo.yan@...aro.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        John Garry <john.g.garry@...cle.com>,
        James Clark <james.clark@....com>,
        Mike Leach <mike.leach@...aro.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        D Scott Phillips <scott@...amperecomputing.com>,
        Marc Zyngier <maz@...nel.org>,
        German Gomez <german.gomez@....com>,
        Ali Saidi <alisaidi@...zon.com>,
        Jing Zhang <renyu.zj@...ux.alibaba.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org, fissure2010@...il.com
Subject: Re: [PATCH v1 1/3] arm64: Add Cortex-X4 CPU part definitions



On 7/17/23 11:13, Leo Yan wrote:
> Add the part number and MIDR definitions for Cortex-X4.
> 
> Signed-off-by: Leo Yan <leo.yan@...aro.org>

LGTM per https://developer.arm.com/documentation/102484/0001/AArch64-registers/AArch64-Identification-registers-summary/MIDR-EL1--Main-ID-Register

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

> ---
>  arch/arm64/include/asm/cputype.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h
> index 5f6f84837a49..415be1a000c6 100644
> --- a/arch/arm64/include/asm/cputype.h
> +++ b/arch/arm64/include/asm/cputype.h
> @@ -84,6 +84,7 @@
>  #define ARM_CPU_PART_CORTEX_X2		0xD48
>  #define ARM_CPU_PART_NEOVERSE_N2	0xD49
>  #define ARM_CPU_PART_CORTEX_A78C	0xD4B
> +#define ARM_CPU_PART_CORTEX_X4		0xD82
>  
>  #define APM_CPU_PART_POTENZA		0x000
>  
> @@ -153,6 +154,7 @@
>  #define MIDR_CORTEX_X2 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_X2)
>  #define MIDR_NEOVERSE_N2 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_NEOVERSE_N2)
>  #define MIDR_CORTEX_A78C	MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A78C)
> +#define MIDR_CORTEX_X4 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_X4)
>  #define MIDR_THUNDERX	MIDR_CPU_MODEL(ARM_CPU_IMP_CAVIUM, CAVIUM_CPU_PART_THUNDERX)
>  #define MIDR_THUNDERX_81XX MIDR_CPU_MODEL(ARM_CPU_IMP_CAVIUM, CAVIUM_CPU_PART_THUNDERX_81XX)
>  #define MIDR_THUNDERX_83XX MIDR_CPU_MODEL(ARM_CPU_IMP_CAVIUM, CAVIUM_CPU_PART_THUNDERX_83XX)