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kvm: x86: svm: Add support to (de)activate posted interrupts

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Introduce interface for (de)activate posted interrupts, and
implement SVM hooks to toggle AMD IOMMU guest virtual APIC mode.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Suravee Suthikulpanit 2019-11-14 14:15:08 -06:00 • committed by Paolo Bonzini
parent 24bbf74c0c
commit 8937d76239
1 changed files with 36 additions and 1 deletions
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37
arch/x86/kvm/svm.c
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@ -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. */ /* Note: Currently only used by Hyper-V. */
static void svm_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu) static void svm_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu)
{ {
struct vcpu_svm *svm = to_svm(vcpu); struct vcpu_svm *svm = to_svm(vcpu);
struct vmcb *vmcb = svm->vmcb; 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; vmcb->control.int_ctl |= AVIC_ENABLE_MASK;
else else
vmcb->control.int_ctl &= ~AVIC_ENABLE_MASK; vmcb->control.int_ctl &= ~AVIC_ENABLE_MASK;
mark_dirty(vmcb, VMCB_AVIC); 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) static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)