On Thu, Sep 30, 2021, Oliver Upton wrote: > On Thu, Sep 30, 2021 at 10:09 AM Sean Christopherson <sea...@google.com> > wrote: > > Unlike PSCI power-off, WFI isn't cross-vCPU, thus there's no hard > > requirement > > for using a request. And KVM_REQ_SLEEP also has an additional guard in > > that it > > doesn't enter rcuwait if power_off (or pause) was cleared after the request > > was > > made, e.g. if userspace stuffed vCPU state and set the vCPU RUNNABLE. > > Yeah, I don't think the punt is necessary for anything but the case > where userspace sets the MP state to request WFI behavior. A helper > method amongst all WFI cases is sufficient, and using the deferral for > everything is a change in behavior.
Is there an actual use case for letting userspace request WFI behavior? _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
