linux-kernel - Re: [PATCH v6 1/2] dt-bindings: cpufreq: add virtual cpufreq device

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Message-ID: <171639005247.3294172.9981807951705426790.robh@kernel.org>
Date: Wed, 22 May 2024 10:00:54 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: David Dai <davidai@...gle.com>
Cc: Will Deacon <will@...nel.org>, Sudeep Holla <sudeep.holla@....com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Pavan Kondeti <quic_pkondeti@...cinc.com>,
	devicetree@...r.kernel.org,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Saravana Kannan <saravanak@...gle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Oliver Upton <oliver.upton@...ux.dev>, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Masami Hiramatsu <mhiramat@...gle.com>,
	Quentin Perret <qperret@...gle.com>,
	Gupta Pankaj <pankaj.gupta@....com>, Marc Zyngier <maz@...nel.org>,
	Mel Gorman <mgorman@...e.de>,
	"Rafael J. Wysocki" <rafael@...nel.org>, kernel-team@...roid.com
Subject: Re: [PATCH v6 1/2] dt-bindings: cpufreq: add virtual cpufreq device


On Mon, 20 May 2024 21:30:51 -0700, David Dai wrote:
> Adding bindings to represent a virtual cpufreq device.
> 
> Virtual machines may expose MMIO regions for a virtual cpufreq device
> for guests to read performance information or to request performance
> selection. The virtual cpufreq device has an individual controller for
> each performance domain. Performance points for a given domain can be
> normalized across all domains for ease of allowing for virtual machines
> to migrate between hosts.
> 
> Co-developed-by: Saravana Kannan <saravanak@...gle.com>
> Signed-off-by: Saravana Kannan <saravanak@...gle.com>
> Signed-off-by: David Dai <davidai@...gle.com>
> ---
>  .../cpufreq/qemu,virtual-cpufreq.yaml         | 48 +++++++++++++++++++
>  1 file changed, 48 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/cpufreq/qemu,virtual-cpufreq.yaml
> 

Reviewed-by: Rob Herring (Arm) <robh@...nel.org>