On 4/21/20 9:39 PM, Richard Henderson wrote: > On 4/20/20 3:29 AM, Szabolcs Nagy wrote: >> i'm using the branch at >> >> https://github.com/rth7680/qemu/tree/tgt-arm-mte >> >> to test armv8.5-a mte and hope this is ok to report bugs here. >> >> i'm doing tests in qemu-system-aarch64 with linux userspace >> code and it seems TCO bit gets cleared after syscalls or other >> kernel entry, but PSTATE is expected to be restored, so i >> suspect it is a qemu bug. >> >> i think the architecture saves/restores PSTATE using SPSR_ELx >> on exceptions. > > Yep. I failed to update aarch64_pstate_valid_mask for TCO. > Will fix. Thanks,
Fixed on the branch. I still need to work out how best to plumb the arm,armv8.5-memtag property so the devel/mte-v3 kernel branch isn't usable as-is for the moment. For myself, I've just commented that test out for now. r~
