On Mon, Jan 31, 2022 at 09:50:58PM +0800, Guo Ren wrote: > On Mon, Jan 31, 2022 at 8:26 PM Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > > > > Given that most rv64 implementations can't run in rv32 mode, what is the > > failure mode if someone tries it with the compat mode enabled? > A static linked simple hello_world could still run on a non-compat > support hardware. But most rv32 apps would meet different userspace > segment faults. > > Current code would let the machine try the rv32 apps without detecting > whether hw support or not. Hmm, we probably want some kind of check for not even offer running rv32 binaries. I guess trying to write UXL some time during early boot and catching the resulting exception would be the way to go? > > > -- > Best Regards > Guo Ren > > ML: https://lore.kernel.org/linux-csky/ ---end quoted text---
