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h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=t3xVA3KdE1o525Bs+jAGrF2sREXD+fWa1Ior5V3zAjQ=; b=ZNVfuI+OsijtWPx6X4w4wyf19NvPNjIKGV5yyjqKcroJJCYvJiYIJgvi4R08N16ZKEqUc62yFCYEUdwq8Tu9zZUZdfp7xW53oiRDiURpn4ZLgGH3FhCXaF14mpsphr4CyEA8C28v82jHX/RqiKzpaIYD0cRw5GrMiFTPfRrp9jM= X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C From: Penny Zheng To: CC: , Penny Zheng , Jan Beulich Subject: [PATCH v6 17/19] xen/cpufreq: introduce helper cpufreq_in_cppc_passive_mode() Date: Fri, 11 Jul 2025 11:51:04 +0800 Message-ID: <20250711035106.2540522-18-Penny.Zheng@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250711035106.2540522-1-Penny.Zheng@amd.com> References: <20250711035106.2540522-1-Penny.Zheng@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF00001CE5:EE_|PH7PR12MB8056:EE_ X-MS-Office365-Filtering-Correlation-Id: 2f17b3f8-e6a7-43ee-a91a-08ddc02e4c13 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|82310400026|36860700013; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Jul 2025 03:52:03.2526 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2f17b3f8-e6a7-43ee-a91a-08ddc02e4c13 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF00001CE5.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB8056 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1752206476951116600 Content-Type: text/plain; charset="utf-8" When cpufreq driver in cppc passive mode, it has both cppc and governor info. We need to invoke two sysctl sub-ops ("get-cpufreq-cppc" and "get-cpufreq-para") to produce both info. A new helper cpufreq_in_cppc_passive_mode() is introduced to tell whether cpufreq driver supports cppc passive mode. Signed-off-by: Penny Zheng --- v5 -> v6 - new commit --- xen/drivers/acpi/pm-op.c | 10 +++++++++- xen/drivers/cpufreq/cpufreq.c | 6 ++++++ xen/include/acpi/cpufreq/cpufreq.h | 2 ++ 3 files changed, 17 insertions(+), 1 deletion(-) diff --git a/xen/drivers/acpi/pm-op.c b/xen/drivers/acpi/pm-op.c index 0723cea34c..077efdfc5c 100644 --- a/xen/drivers/acpi/pm-op.c +++ b/xen/drivers/acpi/pm-op.c @@ -152,7 +152,15 @@ static int get_cpufreq_para(struct xen_sysctl_pm_op *o= p) else strlcpy(op->u.get_para.scaling_driver, "Unknown", CPUFREQ_NAME_LEN= ); =20 - ret =3D get_cpufreq_cppc(op->cpuid, &op->u.get_para.u.cppc_para); + /* + * When cpufreq driver in cppc passive mode, it has both cppc and gove= rnor + * info. Users could only rely on "get-cpufreq-cppc" to acquire CPPC i= nfo. + * And it returns governor info in "get-cpufreq-para" + */ + if ( cpufreq_in_cppc_passive_mode(op->cpuid) ) + ret =3D -ENODEV; + else + ret =3D get_cpufreq_cppc(op->cpuid, &op->u.get_para.u.cppc_para); if ( ret =3D=3D -ENODEV ) { if ( !(scaling_available_governors =3D diff --git a/xen/drivers/cpufreq/cpufreq.c b/xen/drivers/cpufreq/cpufreq.c index cf1fcf1d22..431f2903f8 100644 --- a/xen/drivers/cpufreq/cpufreq.c +++ b/xen/drivers/cpufreq/cpufreq.c @@ -962,3 +962,9 @@ int __init cpufreq_register_driver(const struct cpufreq= _driver *driver_data) =20 return 0; } + +bool cpufreq_in_cppc_passive_mode(unsigned int cpuid) +{ + return processor_pminfo[cpuid]->init & XEN_CPPC_INIT && + cpufreq_driver.target; +} diff --git a/xen/include/acpi/cpufreq/cpufreq.h b/xen/include/acpi/cpufreq/= cpufreq.h index b0b22d1c9c..dd55d268c0 100644 --- a/xen/include/acpi/cpufreq/cpufreq.h +++ b/xen/include/acpi/cpufreq/cpufreq.h @@ -295,4 +295,6 @@ int acpi_cpufreq_register(void); int amd_cppc_cmdline_parse(const char *s, const char *e); int amd_cppc_register_driver(void); =20 +bool cpufreq_in_cppc_passive_mode(unsigned int cpuid); + #endif /* __XEN_CPUFREQ_PM_H__ */ --=20 2.34.1