Messages in this thread | | | Subject | Re: [RFC] KVM: x86: Support KVM VMs sharing SEV context | From | Paolo Bonzini <> | Date | Mon, 15 Mar 2021 18:29:59 +0100 |
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On 15/03/21 18:05, Tobin Feldman-Fitzthum wrote: >> >> I can answer this part. I think this will actually be simpler than >> with auxiliary vCPUs. There will be a separate pair of VM+vCPU file >> descriptors within the same QEMU process, and some code to set up the >> memory map using KVM_SET_USER_MEMORY_REGION. >> >> However, the code to run this VM will be very small as the VM does not >> have to do MMIO, interrupts, live migration (of itself), etc. It just >> starts up and communicates with QEMU using a mailbox at a >> predetermined address. > > We've been starting up our Migration Handler via OVMF. I'm not sure if > this would work with a minimal setup in QEMU.
Yeah, the way to start up the migration handler would be completely different, you'd have to do so very early (probably SEC).
Paolo
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