On Thu, Apr 8, 2021 at 10:43 AM James Bottomley <jejb@xxxxxxxxxxxxx> wrote: > > On Fri, 2021-04-02 at 16:20 +0200, Paolo Bonzini wrote: > > On 02/04/21 13:58, Ashish Kalra wrote: > > > Hi Nathan, > > > > > > Will you be posting a corresponding Qemu patch for this ? > > > > Hi Ashish, > > > > as far as I know IBM is working on QEMU patches for guest-based > > migration helpers. > > Yes, that's right, we'll take on this part. > > > However, it would be nice to collaborate on the low-level (SEC/PEI) > > firmware patches to detect whether a CPU is part of the primary VM > > or the mirror. If Google has any OVMF patches already done for that, > > it would be great to combine it with IBM's SEV migration code and > > merge it into upstream OVMF. > > We've reached the stage with our prototyping where not having the OVMF > support is blocking us from working on QEMU. If we're going to have to > reinvent the wheel in OVMF because Google is unwilling to publish the > patches, can you at least give some hints about how you did it? > > Thanks, > > James Hey James, It's not strictly necessary to modify OVMF to make SEV VMs live migrate. If we were to modify OVMF, we would contribute those changes upstream. Thanks, Steve
