[Qemu-devel] when does a target frontend need to use gen_io_start()/gen_io_end() ?

[Peter Maydell]

In order for -icount to work, it's important for the target
translate.c code to correctly bracket any generated code which
can "do I/O" with gen_io_start()/gen_io_end() calls. But
does anybody know exactly what the criteria are here for this?
It would be nice if we could document this in a comment in
gen_icount.h -- I'm happy to write one up if somebody will just
tell me what the right answer is :-)

thanks
-- PMM