From patchwork Thu Mar 30 22:43:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Dai X-Patchwork-Id: 13195011 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 64D73C77B6D for ; Thu, 30 Mar 2023 22:45:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231250AbjC3WpA (ORCPT ); Thu, 30 Mar 2023 18:45:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37888 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230509AbjC3Wod (ORCPT ); Thu, 30 Mar 2023 18:44:33 -0400 Received: from mail-yw1-x1149.google.com (mail-yw1-x1149.google.com [IPv6:2607:f8b0:4864:20::1149]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 53DD811E9E for ; Thu, 30 Mar 2023 15:44:29 -0700 (PDT) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-5463f2d3223so28669887b3.14 for ; Thu, 30 Mar 2023 15:44:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; t=1680216269; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=mcnJNCHDCGQ7Pzom/y/MQEMC0VEcznZRpNuHkAP16dM=; b=h+fWFQgFgIewRQ/oEBbhup3NdEkI7VTVNsuOE+DEbbkPezfcqmPxt821KjIEBRuQbG l0zjD5y2da69givEVl5sGT/LrKzZ3TjBHss675g7X6otDgYpfdh+qN2+RTa4QLDKNv9g PDcFoEuUC2taY6ePkBcT1Z7N0RA9q3bwXricL/gDzEv4dXafQDmGXlIKBeyXeR2sEz8o E9FH3ufwR/fPbEciGQgLYG6zQkSaBSw0BtOfmnkR4YfxaB7/7EETD5gleyNZwM9ywyrO n+i0UKoKt4E+CXqxkN8hBn0e4jSHrCNiFCw+gjvKmBdlUar6F84Pyzh3o9haY+aKhz2B Wi9w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680216269; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=mcnJNCHDCGQ7Pzom/y/MQEMC0VEcznZRpNuHkAP16dM=; b=R5Z9o+96WCgj2trDRVLp/Z0P5WABwdgDo66fLFFMemn2XsGIIvpYOVktn+BPOudSnZ YAe0ciTzOvmeK1V6gcaORvk5F0ul0AibAhIbgUArO0AJe36sOZAjtfRgxWzk+6yvp/ke KsghAT+kv0Af+QAWJezObEVmsqKEyCmWvmCWYj/t4Q8Dmd3cyRnIY2+ZM9Ct7QsYc7Ap oXxyV3IzlL3D4qSDo/yO80GzcNOB8hqnr/MFN3PC+AQMpXvnM+kW4r96bPKO1Z/2ZX26 XcnPBp70F6G/504I0doVPupDFaYNdYq8Ce3S6bzHzzjb/nqbYlf5XDM1VSV7lSN9HQoN Y29Q== X-Gm-Message-State: AAQBX9e1XXivlNFPO8HvqASjAUbfLF1z84w7DhkdER/n/iL+viWhEsX6 l7XAuv3+dUhCGyv+EGy26htOlqOCfmHj X-Google-Smtp-Source: AKy350bH+FT4rO63l4r7xqHnuPynxVbMsgCzCxhntsgRkI9CjhoZf4Ra9qEtMvcWq32MGU3qdNWQmk0U4T9r X-Received: from davidai2.mtv.corp.google.com ([2620:15c:211:201:c162:24e8:ec5e:d520]) (user=davidai job=sendgmr) by 2002:a25:c58f:0:b0:b7d:87f:ce3e with SMTP id v137-20020a25c58f000000b00b7d087fce3emr8231840ybe.6.1680216269063; Thu, 30 Mar 2023 15:44:29 -0700 (PDT) Date: Thu, 30 Mar 2023 15:43:40 -0700 In-Reply-To: <20230330224348.1006691-1-davidai@google.com> Mime-Version: 1.0 References: <20230330224348.1006691-1-davidai@google.com> X-Mailer: git-send-email 2.40.0.348.gf938b09366-goog Message-ID: <20230330224348.1006691-6-davidai@google.com> Subject: [RFC PATCH 5/6] dt-bindings: cpufreq: add bindings for virtual kvm cpufreq From: David Dai To: "Rafael J. Wysocki" , Viresh Kumar , Rob Herring , Krzysztof Kozlowski , David Dai Cc: Saravana Kannan , kernel-team@android.com, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add devicetree bindings for a virtual kvm cpufreq driver. Co-developed-by: Saravana Kannan Signed-off-by: Saravana Kannan Signed-off-by: David Dai --- .../bindings/cpufreq/cpufreq-virtual-kvm.yaml | 39 +++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-virtual-kvm.yaml diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-virtual-kvm.yaml b/Documentation/devicetree/bindings/cpufreq/cpufreq-virtual-kvm.yaml new file mode 100644 index 000000000000..31e64558a7f1 --- /dev/null +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-virtual-kvm.yaml @@ -0,0 +1,39 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/cpufreq/cpufreq-virtual-kvm.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Virtual KVM CPUFreq + +maintainers: + - David Dai + +description: | + + KVM CPUFreq is a virtualized driver in guest kernels that sends utilization + of its vCPUs as a hint to the host. The host uses hint to schedule vCPU + threads and select CPU frequency. It enables accurate Per-Entity Load + Tracking for tasks running in the guest by querying host CPU frequency + unless a virtualized FIE exists(Like AMUs). + +properties: + compatible: + const: virtual,kvm-cpufreq + +required: + - compatible + +additionalProperties: false + +examples: + - | + { + #address-cells = <2>; + #size-cells = <2>; + + cpufreq { + compatible = "virtual,kvm-cpufreq"; + }; + + };