On Wed, Nov 15, 2023 at 12:49 AM Marc Zyngier <maz@xxxxxxxxxx> wrote: > > On Sat, 11 Nov 2023 01:49:29 +0000, > David Dai <davidai@xxxxxxxxxx> wrote: > > > > Adding bindings to represent a virtual cpufreq device. > > > > Virtual machines may expose MMIO regions for a virtual cpufreq device > > for guests to read frequency information or to request frequency > > selection. The virtual cpufreq device has an individual controller for > > each frequency domain. > > I would really refrain form having absolute frequencies here. A > virtual machine can be migrated, and there are *zero* guarantees that > the target system has the same clock range as the source. > > This really should be a relative number, much like the capacity. That, > at least, can be migrated across systems. There's nothing in this patch that mandates absolute frequency. In true KVM philosophy, we leave it to the VMM to decide. -Saravana
