linux-kernel - Re: [PATCH 06/10] arm64: Add Neoverse-N2, Cortex-A710 CPU part definition

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Date:   Fri, 30 Jul 2021 16:56:27 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     Suzuki K Poulose <suzuki.poulose@....com>,
        linux-arm-kernel@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, coresight@...ts.linaro.org,
        will@...nel.org, catalin.marinas@....com, james.morse@....com,
        mathieu.poirier@...aro.org, mike.leach@...aro.org,
        leo.yan@...aro.org, maz@...nel.org, mark.rutland@....com
Subject: Re: [PATCH 06/10] arm64: Add Neoverse-N2, Cortex-A710 CPU part
 definition



On 7/28/21 7:22 PM, Suzuki K Poulose wrote:
> Add the CPU Partnumbers for the new Arm designs.
> 
> Cc: Catalin Marinas <catalin.marinas@....com>
> Cc: Mark Rutland <mark.rutland@....com>
> Cc: Will Deacon <will@...nel.org>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
> ---
>  arch/arm64/include/asm/cputype.h | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h
> index 6231e1f0abe7..b71bd6c176c2 100644
> --- a/arch/arm64/include/asm/cputype.h
> +++ b/arch/arm64/include/asm/cputype.h
> @@ -73,6 +73,8 @@
>  #define ARM_CPU_PART_CORTEX_A76		0xD0B
>  #define ARM_CPU_PART_NEOVERSE_N1	0xD0C
>  #define ARM_CPU_PART_CORTEX_A77		0xD0D
> +#define ARM_CPU_PART_CORTEX_A710	0xD47
> +#define ARM_CPU_PART_NEOVERSE_N2	0xD49
>  
>  #define APM_CPU_PART_POTENZA		0x000
>  
> @@ -112,6 +114,8 @@
>  #define MIDR_CORTEX_A55 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A55)
>  #define MIDR_CORTEX_A76	MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A76)
>  #define MIDR_NEOVERSE_N1 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_NEOVERSE_N1)
> +#define MIDR_CORTEX_A710 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A710)
> +#define MIDR_NEOVERSE_N2 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_NEOVERSE_N2)

Should not the new ones be added after MIDR_CORTEX_A77 below to preserve the order ?

>  #define MIDR_CORTEX_A77	MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A77)
>  #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