Re: [PATCH v5 19/19] virt: arm-cca-guest: TSM_REPORT support for realms

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On 02/09/2024 04:53, Aneesh Kumar K.V wrote:
> Steven Price <steven.price@xxxxxxx> writes:
> 
>> From: Sami Mujawar <sami.mujawar@xxxxxxx>
>  
> ...
>  
>> --- /dev/null
>> +++ b/drivers/virt/coco/arm-cca-guest/Kconfig
>> @@ -0,0 +1,11 @@
>> +config ARM_CCA_GUEST
>> +	tristate "Arm CCA Guest driver"
>> +	depends on ARM64
>> +	default m
>> +	select TSM_REPORTS
>> +	help
>> +	  The driver provides userspace interface to request and
>> +	  attestation report from the Realm Management Monitor(RMM).
>> +
>> +	  If you choose 'M' here, this module will be called
>> +	  arm-cca-guest.
>>
> 
> Can we rename the generic Kconfig variable to ARM_CCA_TSM_REPORT?. Also
> should the directory be arm64-cca-guest?

This matches the existing sev-guest and tdx-guest directories (and
SEV_GUEST/TDX_GUEST_DRIVER kconfig), although I agree it's not great
naming as it stands.

But I'm also wondering if this will one day expand to include some other
communication with the RMM. For example I know it's been discussed
whether the guest should have involvement with firmware updates or
migration to another host. So there's a reasonable chance we could end
up renaming it back to a general "arm_cca_guest" if it grows more
capabilities in the future.

Steve





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