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h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=uKMq5MghF8UFPlQJDia7shL8Q+N/pOobWNyzD8HVQKI=; b=YuS2gFTbJEPcn+aOz5m18Z8mwOwSo6JT5o9l4mO6yC86Y3sjM5Ucuo8etTclsOH8YG/6e/f+3uc2nCtXhgWz4YKC4BSXMJafNaCrXg2fHB0/mTYDdorXCbqlQrvMV9B5fpV7Ew8TjW9EYdbS6vL7KHTHe2rR7w/Yem0G6oolKAM= 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 v5 12/18] xen/cpufreq: get performance policy from governor set via xenpm Date: Tue, 27 May 2025 16:48:27 +0800 Message-ID: <20250527084833.338427-13-Penny.Zheng@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250527084833.338427-1-Penny.Zheng@amd.com> References: <20250527084833.338427-1-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: SJ5PEPF000001F0:EE_|CH3PR12MB7763:EE_ X-MS-Office365-Filtering-Correlation-Id: b3ca16e1-e993-4cb3-ed29-08dd9cfb672f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|376014|82310400026|1800799024; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 May 2025 08:49:33.7131 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b3ca16e1-e993-4cb3-ed29-08dd9cfb672f 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: SJ5PEPF000001F0.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB7763 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1748335866068116600 Content-Type: text/plain; charset="utf-8" Even if Xen governor is not used in amd-cppc active mode, we could somehow deduce which performance policy (CPUFREQ_POLICY_xxx) user wants to apply through which governor they choose, such as: If user chooses performance governor, they want maximum performance. If user chooses powersave governor, they want the least power consumption. Function cpufreq_policy_from_governor() is responsible for above transition, and it shall be also effective when users setting new governor through xenp= m. ondemand and userspace are forbidden choices, and if users specify such options, we shall not only give warning message, but also error out. Signed-off-by: Penny Zheng --- v4 -> v5: - new commit --- xen/drivers/acpi/pmstat.c | 8 ++++++++ xen/drivers/cpufreq/utility.c | 1 + 2 files changed, 9 insertions(+) diff --git a/xen/drivers/acpi/pmstat.c b/xen/drivers/acpi/pmstat.c index 330bc3a1c2..514475cf5c 100644 --- a/xen/drivers/acpi/pmstat.c +++ b/xen/drivers/acpi/pmstat.c @@ -319,6 +319,14 @@ static int set_cpufreq_gov(struct xen_sysctl_pm_op *op) if (new_policy.governor =3D=3D NULL) return -EINVAL; =20 + new_policy.policy =3D cpufreq_policy_from_governor(new_policy.governor= ); + if ( new_policy.policy =3D=3D CPUFREQ_POLICY_UNKNOWN ) + { + printk("Failed to get performance policy from %s, and users shall = write epp values to deliver preference towards performance over efficiency", + new_policy.governor->name); + return -EINVAL; + } + return __cpufreq_set_policy(old_policy, &new_policy); } =20 diff --git a/xen/drivers/cpufreq/utility.c b/xen/drivers/cpufreq/utility.c index 2617581125..734cd84be1 100644 --- a/xen/drivers/cpufreq/utility.c +++ b/xen/drivers/cpufreq/utility.c @@ -456,6 +456,7 @@ int __cpufreq_set_policy(struct cpufreq_policy *data, data->min =3D policy->min; data->max =3D policy->max; data->limits =3D policy->limits; + data->policy =3D policy->policy; if (cpufreq_driver.setpolicy) return alternative_call(cpufreq_driver.setpolicy, data); =20 --=20 2.34.1