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Tue, 7 Oct 2025 06:22:17 +0000 Message-ID: <00d0f3f3-d2b4-4885-9a49-5e6f8390142b@intel.com> Date: Tue, 7 Oct 2025 11:52:09 +0530 User-Agent: Mozilla Thunderbird Subject: Re: REGRESSION on linux-next (next-20250919) Content-Language: en-GB From: "Borah, Chaitanya Kumar" To: Sean Christopherson , Dapeng Mi CC: "intel-gfx@lists.freedesktop.org" , "intel-xe@lists.freedesktop.org" , "Suresh Kumar Kurmi" , Jani Saarinen , , , References: <70b64347-2aca-4511-af78-a767d5fa8226@intel.com> <25af94f5-79e3-4005-964e-e77b1320a16e@linux.intel.com> <3bbc4e6d-9f52-483c-a25d-166dca62fb25@intel.com> In-Reply-To: <3bbc4e6d-9f52-483c-a25d-166dca62fb25@intel.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit X-ClientProxiedBy: MA0PR01CA0044.INDPRD01.PROD.OUTLOOK.COM (2603:1096:a01:81::17) To SJ1PR11MB6129.namprd11.prod.outlook.com (2603:10b6:a03:488::12) Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PR11MB6129:EE_|SN7PR11MB7140:EE_ X-MS-Office365-Filtering-Correlation-Id: 78881c69-8ef6-4229-f9ae-08de0569dcf7 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|376014; 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>         int min_nr_gp_ctrs = pmu_ops->MIN_NR_GP_COUNTERS; > > -       perf_get_x86_pmu_capability(&kvm_host_pmu); > - >         /* >          * Hybrid PMUs don't play nice with virtualization without careful >          * configuration by userspace, and KVM's APIs for reporting > supported >          * vPMU features do not account for hybrid PMUs.  Disable vPMU > support >          * for hybrid PMUs until KVM gains a way to let userspace opt-in. >          */ > -       if (cpu_feature_enabled(X86_FEATURE_HYBRID_CPU)) > +       if (cpu_feature_enabled(X86_FEATURE_HYBRID_CPU)) { >                 enable_pmu = false; > +               memset(&kvm_host_pmu, 0, sizeof(kvm_host_pmu)); > +       } else { > +               perf_get_x86_pmu_capability(&kvm_host_pmu); > +       } Can we expect a formal patch soon? Regards Chaitanya