Re: [PATCH v3 2/2] cpufreq: add virtual-cpufreq driver

[Randy Dunlap]

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