Asking about the Fault Handling of GPFs in Arm CCA

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Dear experts,

    I have been learning the Fault Handling of the Granule Protection 
Fault in Arm CCA. I noticed in `target/arm/tcg/tlb_helper.c` that a new 
function, `report_as_gpc_exception`, was introduced in last year's 
commit. If `fi->gpcf == GPCF_Fail`, the return value is the checking 
result of whether GPF bit in SCR_EL3 is set and whether the current_el 
is 3. So if the GPF bit is set, then all GPFs should be pass to EL3 to 
handle.

    However, upon examining the code in QEMU, I was unable to locate 
any related information in EL3's code (TrustedFirmware-A or ATF). Nor 
could I find any demo code to test this Arm CCA feature. This has led me 
to wonder: is this patch solely a QEMU-side patch, with other components 
yet to catch up?

    I would greatly appreciate any guidance or advice you could provide 
to help me test this patch or understand this feature better.

Sincerely,

Feifan Qian