On 7/31/23 10:46, David Dai wrote: > diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig > index f429b9b37b76..3977ca796747 100644 > --- a/drivers/cpufreq/Kconfig > +++ b/drivers/cpufreq/Kconfig > @@ -217,6 +217,21 @@ config CPUFREQ_DT > > If in doubt, say N. > > +config CPUFREQ_VIRT > + tristate "Virtual cpufreq driver" > + depends on OF > + select PM_OPP > + help The 4 lines above should be indented with one tab (not 8 spaces). > + This adds a virtualized cpufreq driver for guest kernels that > + read/writes to a MMIO region for a virtualized cpufreq device to reads/writes to an MMIO region > + communicate with the host. It sends frequency updates to the host > + which gets used as a hint to schedule vCPU threads and select CPU > + frequency. If a VM does not support a virtualized FIE such as AMUs, > + it updates the frequency scaling factor by polling host CPU frequency > + to enable accurate Per-Entity Load Tracking for tasks running in the guest. > + > + If in doubt, say N. -- ~Randy
