On Mon, Nov 22, 2021 at 02:51:35PM -0800, Dave Hansen wrote: > My preference would be that we never have SEV-SNP code in the kernel > that can panic() the host from guest userspace. If that means waiting > until there's common guest unmapping infrastructure around, then I think > we should wait. Can you elaborate how to crash host kernel from guest user-space? If I understood correctly it was about crashing host kernel from _host_ user-space. I think the RMP-fault path in the page-fault handler needs to take the uaccess exception tables into account before actually causing a panic. This should solve most of the problems discussed here. Maybe we also need the previously suggested copy_from/to_guest() interfaces. Regards, -- Jörg Rödel jroedel@xxxxxxx SUSE Software Solutions Germany GmbH Maxfeldstr. 5 90409 Nürnberg Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Ivo Totev
