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a="31588466" X-IronPort-AV: E=Sophos;i="6.14,271,1736841600"; d="scan'208";a="31588466" X-CSE-ConnectionGUID: h7j1ukYCQSqoT6dryF50Bw== X-CSE-MsgGUID: 6xu+B54JQaiEpUbobTY1pw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.14,271,1736841600"; d="scan'208";a="123944393" From: Dapeng Mi To: Paolo Bonzini , Sean Christopherson Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, Zhao Liu , Zide Chen , Xiaoyao Li , Dongli Zhang , Mingwei Zhang , Das Sandipan , Shukla Manali , Dapeng Mi , Dapeng Mi Subject: [PATCH 2/3] target/i386: Call KVM_CAP_PMU_CAPABILITY iotcl to enable/disable PMU Date: Mon, 24 Mar 2025 12:37:11 +0000 Message-Id: <20250324123712.34096-3-dapeng1.mi@linux.intel.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20250324123712.34096-1-dapeng1.mi@linux.intel.com> References: <20250324123712.34096-1-dapeng1.mi@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: none client-ip=192.198.163.16; envelope-from=dapeng1.mi@linux.intel.com; helo=mgamail.intel.com X-Spam_score_int: -12 X-Spam_score: -1.3 X-Spam_bar: - X-Spam_report: (-1.3 / 5.0 requ) BAYES_00=-1.9, DATE_IN_FUTURE_03_06=3.027, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1742800200767116600 Content-Type: text/plain; charset="utf-8" After introducing mediated vPMU, mediated vPMU must be enabled by explicitly calling KVM_CAP_PMU_CAPABILITY to enable. Thus call KVM_CAP_PMU_CAPABILITY to enable/disable PMU base on user configuration. Suggested-by: Zhao Liu Signed-off-by: Dapeng Mi --- target/i386/kvm/kvm.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index f41e190fb8..d3e6984844 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -2051,8 +2051,25 @@ full: abort(); } =20 +static bool pmu_cap_set =3D false; int kvm_arch_pre_create_vcpu(CPUState *cpu, Error **errp) { + KVMState *s =3D kvm_state; + X86CPU *x86_cpu =3D X86_CPU(cpu); + + if (!pmu_cap_set && kvm_check_extension(s, KVM_CAP_PMU_CAPABILITY)) { + int r =3D kvm_vm_enable_cap(s, KVM_CAP_PMU_CAPABILITY, 0, + KVM_PMU_CAP_DISABLE & !x86_cpu->enable_p= mu); + if (r < 0) { + error_report("kvm: Failed to %s pmu cap: %s", + x86_cpu->enable_pmu ? "enable" : "disable", + strerror(-r)); + return r; + } + + pmu_cap_set =3D true; + } + return 0; } =20 --=20 2.40.1