On Wed, 19 Jul 2023 at 16:56, Jean-Philippe Brucker <jean-phili...@linaro.org> wrote: > > With these patches I'm able to boot a Realm guest under > "-cpu max,x-rme=on". They are based on Peter's series which fixes > handling of NSTable: > https://lore.kernel.org/qemu-devel/20230714154648.327466-1-peter.mayd...@linaro.org/
Thanks for testing this -- this is a lot closer to working out of the box than I thought we might be :-) I'm tempted to try to put these fixes (and my ptw patchset) into 8.1, but OTOH I suspect work on Realm guests will probably still want to use a bleeding-edge QEMU for other bugs we're going to discover over the next few months, so IDK. We'll see how code review goes on those, I guess. > Running a Realm guest requires components at EL3 and R-EL2. Some rough > support for TF-A and RMM is available here: > https://jpbrucker.net/git/tf-a/log/?h=qemu-rme > https://jpbrucker.net/git/rmm/log/?h=qemu-rme > I'll clean this up before sending it out. > > I also need to manually disable FEAT_SME in QEMU in order to boot this, Do you mean you needed to do something more invasive than '-cpu max,x-rme=on,sme=off' ? > otherwise the Linux host fails to boot because hyp-stub accesses to SME > regs are trapped to EL3, which doesn't support RME+SME at the moment. > The right fix is probably in TF-A but I haven't investigated yet. thanks -- PMM
