On Tue, Feb 1, 2022 at 3:45 PM Christoph Hellwig <hch@xxxxxx> wrote: > > 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? Emm... I think it's unnecessary. Free rv32 app running won't cause system problem, just as a wrong elf running. They are U-mode privileged. > > > > > > > -- > > Best Regards > > Guo Ren > > > > ML: https://lore.kernel.org/linux-csky/ > ---end quoted text--- -- Best Regards Guo Ren ML: https://lore.kernel.org/linux-csky/
