On 11.08.20 09:49, Peng Fan wrote:
>> Subject: Re: [PATCH 08/10] arm64: sysregs: correct SCTLR_EL1_RES
>>
>> On 07.08.20 05:06, [email protected] wrote:
>>> From: Peng Fan <[email protected]>
>>>
>>> bit23 is SPAN, not reserved bit.
>>>
>>
>> This is not correct, see D7.2.81 in the ARMv8 manual.
>>
>> Where did you get this from? What is it trying to fix?
> 
> DDI0487D_a_armv8_arm, 
> " D12.2.100 SCTLR_EL1, System Control Register (EL1)"
> 
> This is just to align with Linux Kernel, since the head.S
> in the bootloader needs this.

OK, this is ARMv8.1+, I was looking at 8.0. Are you sure the reset value
changed from 8.0 to 8.1? We definitely need to remain compatible to 8.0.

Jan

-- 
Siemens AG, Corporate Technology, CT RDA IOT SES-DE
Corporate Competence Center Embedded Linux

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