Re: [PATCH v7 2/2] cpufreq: add virtual-cpufreq driver

[Sudeep Holla]

On Wed, Sep 18, 2024 at 05:08:33PM -0700, David Dai wrote:
> Introduce a virtualized cpufreq driver for guest kernels to improve
> performance and power of workloads within VMs.
> 
> This driver does two main things:
> 
> 1. Sends the frequency of vCPUs as a hint to the host. The host uses the
> hint to schedule the vCPU threads and decide physical CPU frequency.
> 
> 2. If a VM does not support a virtualized FIE(like AMUs), it queries the
> host CPU frequency by reading a MMIO region of a virtual cpufreq device
> to update the guest's frequency scaling factor periodically. This enables
> accurate Per-Entity Load Tracking for tasks running in the guest.
>

Acked-by: Sudeep Holla <sudeep.holla@xxxxxxx>

-- 
Regards,
Sudeep