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

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Message-ID: <837984bf-3319-ad33-5b8f-3856a1c6c1ec@arm.com>
Date:   Fri, 30 Jul 2021 15:31:23 +0100
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     Anshuman Khandual <anshuman.khandual@....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 30/07/2021 12:26, Anshuman Khandual wrote:
> 
> 
> 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 ?
> 

TBH. The order doesn't matter much as they are part numbers for
different CPUs, without any dependencies between them.
But for the sake of keeping the order, I could fix this.

Thanks
Suzuki