linux-kernel - Re: [PATCH 3/4] arm64/sysreg: Add TCR

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Message-ID: <ce4528c1-2b78-47a3-95c7-e4e3248755e4@arm.com>
Date: Tue, 19 Aug 2025 09:16:42 +0530
From: Anshuman Khandual <anshuman.khandual@....com>
To: Mark Rutland <mark.rutland@....com>
Cc: linux-arm-kernel@...ts.infradead.org,
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>,
 Marc Zyngier <maz@...nel.org>, Oliver Upton <oliver.upton@...ux.dev>,
 Mark Brown <broonie@...nel.org>, Ryan Roberts <ryan.roberts@....com>,
 kvmarm@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] arm64/sysreg: Add TCR_EL2 register



On 18/08/25 2:47 PM, Mark Rutland wrote:
> On Mon, Aug 18, 2025 at 10:27:58AM +0530, Anshuman Khandual wrote:
>> diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg
>> index 4bdae8bb11dc..d2b40105eb41 100644
>> --- a/arch/arm64/tools/sysreg
>> +++ b/arch/arm64/tools/sysreg
>> @@ -4812,6 +4812,50 @@ Sysreg	TCR_EL12        3	5	2	0	2
>>  Mapping	TCR_EL1
>>  EndSysreg
>>  
>> +Sysreg	TCR_EL2        3	4	2	0	2
>> +Res0	63:34
>> +Field	33	MTX
>> +Field	32	DS
>> +Res1	31
>> +Field	30	TCMA
>> +Field	29	TBID
>> +Field	28	HWU62
>> +Field	27	HWU61
>> +Field	26	HWU60
>> +Field	25	HWU59
>> +Field	24	HPD
>> +Res1	23
>> +Field	22	HD
>> +Field	21	HA
>> +Field	20	TBI
>> +Res0	19
>> +Field   18:16	PS
>> +UnsignedEnum	15:14	TG0
>> +	0b00	4K
>> +	0b01	64K
>> +	0b10	16K
>> +EndEnum
> 
> Same comment as for patch 1: this is not ordered, use Enum rather than
> UnsignedEnum. Likewise for the other cases below.


Sure, will change.
> 
> Mark.
> 
>> +UnsignedEnum	13:12	SH0
>> +	0b00	NONE
>> +	0b10	OUTER
>> +	0b11	INNER
>> +EndEnum
>> +UnsignedEnum	11:10	ORGN0
>> +	0b00	NC
>> +	0b01	WBWA
>> +	0b10	WT
>> +	0b11	WBnWA
>> +EndEnum
>> +UnsignedEnum	9:8	IRGN0
>> +	0b00	NC
>> +	0b01	WBWA
>> +	0b10	WT
>> +	0b11	WBnWA
>> +EndEnum
>> +Res0    7:6
>> +Field   5:0	T0SZ
>> +EndSysreg
>> +
>>  Sysreg	TCRALIAS_EL1    3	0	2	7	6
>>  Mapping	TCR_EL1
>>  EndSysreg
>> -- 
>> 2.25.1
>>
>>