On Wed, Aug 22, 2018 at 10:14:17AM +0200, Borislav Petkov wrote: > Dropping Pavel as it bounces. > > On Tue, Aug 21, 2018 at 11:07:38AM -0500, Brijesh Singh wrote: > > The tsc_early_init() is called before setup_arch() -> init_mem_mapping. > > Ok, I see it, thanks for explaining. > > So back to your original ideas - I'm wondering whether we should define > a chunk of memory which the hypervisor and guest can share and thus > communicate over... Something ala SEV-ES also with strictly defined > layout and put all those variables there. And then the guest can map > decrypted.
What about creating a data section specifically for shared memory? The section would be PMD aligned and sized so that it could be mapped appropriately without having to fracture the page. Then define a macro to easily declare data in the new section, a la __read_mostly. > There might be something similar though, I dunno. > > Maybe Paolo has a better idea... > > -- > Regards/Gruss, > Boris. > > SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB > 21284 (AG Nürnberg) > --
