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, r~ > > i used the linux branch > https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=devel/mte-v2 > > attached a reproducer that segfaults in qemu but should work. > > thanks. >
