On 21 March 2017 at 19:39, Christoffer Dall <cdall@xxxxxxxxxx> wrote: > My confusion here comes from not thinking about QEMU or KVM as firmware, > but as the machine, so it would be sort of like the functionality is > baked into hardware rather than firmware. There is precedent for that kind of thing -- we implement PSCI in KVM/QEMU for the guest, though in real hardware it would be provided by firmware at EL3. thanks -- PMM