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
