Re: [PATCH 5/6] arm64/cpufeature: Drop TraceFilt feature exposure from ID_DFR0 register

[Anshuman Khandual]

On 04/09/2020 06:23 PM, Will Deacon wrote:
> On Fri, Mar 20, 2020 at 06:19:21PM +0000, Suzuki K Poulose wrote:
>> On 01/28/2020 12:39 PM, Anshuman Khandual wrote:
>>> ID_DFR0 based TraceFilt feature should not be exposed.
>>
>> ... to guests.
>>
>>  Hence lets drop it.
>>
>> Reviewed-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
> 
> Hmm, doesn't dropping cause it to become NONSTRICT? In general, I'd prefer
> that we list all fields in these tables, rather than have implicit behaviour
> in their absence.

Just trying to understand, so we should just leave it unchanged.

ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, 28, 4, 0)

> 
> Will
>