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Thu, 14 Nov 2019 20:15:38 +0000 From: Suravee Suthikulpanit To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: pbonzini@redhat.com, rkrcmar@redhat.com, joro@8bytes.org, vkuznets@redhat.com, rkagan@virtuozzo.com, graf@amazon.com, jschoenh@amazon.de, karahmed@amazon.de, rimasluk@amazon.com, jon.grimm@amd.com, Suravee Suthikulpanit Subject: [PATCH v5 06/18] kvm: x86: svm: Add support to (de)activate posted interrupts Date: Thu, 14 Nov 2019 14:15:08 -0600 Message-Id: <1573762520-80328-7-git-send-email-suravee.suthikulpanit@amd.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1573762520-80328-1-git-send-email-suravee.suthikulpanit@amd.com> References: <1573762520-80328-1-git-send-email-suravee.suthikulpanit@amd.com> Content-Type: text/plain X-ClientProxiedBy: SN1PR12CA0099.namprd12.prod.outlook.com (2603:10b6:802:21::34) To DM6PR12MB3865.namprd12.prod.outlook.com (2603:10b6:5:1c8::18) MIME-Version: 1.0 X-Mailer: git-send-email 1.8.3.1 X-Originating-IP: [165.204.78.1] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: 8fbf26b2-0d4c-4fb8-ac49-08d7693f6a84 X-MS-TrafficTypeDiagnostic: DM6PR12MB3739: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:303; 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Signed-off-by: Suravee Suthikulpanit --- arch/x86/kvm/svm.c | 37 ++++++++++++++++++++++++++++++++++++- 1 file changed, 36 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 3395e4c..38401f9 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -5134,17 +5134,52 @@ static void svm_hwapic_isr_update(struct kvm_vcpu *vcpu, int max_isr) { } +static int svm_set_pi_irte_mode(struct kvm_vcpu *vcpu, bool activate) +{ + int ret = 0; + unsigned long flags; + struct amd_svm_iommu_ir *ir; + struct vcpu_svm *svm = to_svm(vcpu); + + if (!kvm_arch_has_assigned_device(vcpu->kvm)) + return 0; + + /* + * Here, we go through the per-vcpu ir_list to update all existing + * interrupt remapping table entry targeting this vcpu. + */ + spin_lock_irqsave(&svm->ir_list_lock, flags); + + if (list_empty(&svm->ir_list)) + goto out; + + list_for_each_entry(ir, &svm->ir_list, node) { + if (activate) + ret = amd_iommu_activate_guest_mode(ir->data); + else + ret = amd_iommu_deactivate_guest_mode(ir->data); + if (ret) + break; + } +out: + spin_unlock_irqrestore(&svm->ir_list_lock, flags); + return ret; +} + /* Note: Currently only used by Hyper-V. */ static void svm_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu) { struct vcpu_svm *svm = to_svm(vcpu); struct vmcb *vmcb = svm->vmcb; + bool activated = kvm_vcpu_apicv_active(vcpu); - if (kvm_vcpu_apicv_active(vcpu)) + if (activated) vmcb->control.int_ctl |= AVIC_ENABLE_MASK; else vmcb->control.int_ctl &= ~AVIC_ENABLE_MASK; mark_dirty(vmcb, VMCB_AVIC); + + svm_set_pi_irte_mode(vcpu, activated); } static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap) -- 1.8.3.1