On Tue, Jun 12, 2018 at 09:47:11PM +0300, Michael S. Tsirkin wrote: > With this flag, kvm allows guest to control host CPU power state. This > increases latency for other processes using same host CPU in an > unpredictable way, but if decreases idle entry/exit times for the > running VCPU. > > Follow-up patches will expose this capability to guest > (using mwait leaf). > > Based on a patch by Wanpeng Li <kernellwp@xxxxxxxxx> . > > Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx> The interface makes sense to me, but: > +extern bool enable_cpu_pm; Why do we need a global variable if initialization code can call qemu_opt_get_bool() directly? -- Eduardo
