From 8937d762396d22bdb59f02732a66db6b58e746b1 Mon Sep 17 00:00:00 2001 From: Suravee Suthikulpanit Date: Thu, 14 Nov 2019 14:15:08 -0600 Subject: kvm: x86: svm: Add support to (de)activate posted interrupts Introduce interface for (de)activate posted interrupts, and implement SVM hooks to toggle AMD IOMMU guest virtual APIC mode. Signed-off-by: Suravee Suthikulpanit Signed-off-by: Paolo Bonzini --- arch/x86/kvm/svm.c | 37 ++++++++++++++++++++++++++++++++++++- 1 file changed, 36 insertions(+), 1 deletion(-) (limited to 'arch') diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index b0c343fef14d..e6118d17de6e 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -5155,17 +5155,52 @@ 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) -- cgit v1.2.3