On Mon, Jul 06, 2020 at 08:55:35AM +0800, Guo Ren wrote: > On Mon, Jul 6, 2020 at 4:31 AM Kees Cook <keescook@xxxxxxxxxxxx> wrote: > > Sure -- I assume get_cycles64() is architecturally "simple"? (i.e. it > > doesn't require that the entire time-keeping subsystem has started?) > Yes, it's just a csr read. But it's necessary? get_random_bytes should enough. Well, that depends on how early _all_ riscv platforms are able to initialize their random pool correctly. I'd include a csr mix. -- Kees Cook
