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Diffstat (limited to 'virt/kvm/kvm_main.c')
-rw-r--r--virt/kvm/kvm_main.c98
1 files changed, 92 insertions, 6 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 8bd44d6985c..3bed82754a5 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -236,13 +236,33 @@ static void kvm_free_assigned_irq(struct kvm *kvm,
* now, the kvm state is still legal for probably we also have to wait
* interrupt_work done.
*/
- disable_irq_nosync(assigned_dev->host_irq);
- cancel_work_sync(&assigned_dev->interrupt_work);
+ if (assigned_dev->irq_requested_type & KVM_ASSIGNED_DEV_MSIX) {
+ int i;
+ for (i = 0; i < assigned_dev->entries_nr; i++)
+ disable_irq_nosync(assigned_dev->
+ host_msix_entries[i].vector);
+
+ cancel_work_sync(&assigned_dev->interrupt_work);
- free_irq(assigned_dev->host_irq, (void *)assigned_dev);
+ for (i = 0; i < assigned_dev->entries_nr; i++)
+ free_irq(assigned_dev->host_msix_entries[i].vector,
+ (void *)assigned_dev);
- if (assigned_dev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI)
- pci_disable_msi(assigned_dev->dev);
+ assigned_dev->entries_nr = 0;
+ kfree(assigned_dev->host_msix_entries);
+ kfree(assigned_dev->guest_msix_entries);
+ pci_disable_msix(assigned_dev->dev);
+ } else {
+ /* Deal with MSI and INTx */
+ disable_irq_nosync(assigned_dev->host_irq);
+ cancel_work_sync(&assigned_dev->interrupt_work);
+
+ free_irq(assigned_dev->host_irq, (void *)assigned_dev);
+
+ if (assigned_dev->irq_requested_type &
+ KVM_ASSIGNED_DEV_HOST_MSI)
+ pci_disable_msi(assigned_dev->dev);
+ }
assigned_dev->irq_requested_type = 0;
}
@@ -373,6 +393,60 @@ static int assigned_device_update_msi(struct kvm *kvm,
}
#endif
+#ifdef __KVM_HAVE_MSIX
+static int assigned_device_update_msix(struct kvm *kvm,
+ struct kvm_assigned_dev_kernel *adev,
+ struct kvm_assigned_irq *airq)
+{
+ /* TODO Deal with KVM_DEV_IRQ_ASSIGNED_MASK_MSIX */
+ int i, r;
+
+ adev->ack_notifier.gsi = -1;
+
+ if (irqchip_in_kernel(kvm)) {
+ if (airq->flags & KVM_DEV_IRQ_ASSIGN_MASK_MSIX)
+ return -ENOTTY;
+
+ if (!(airq->flags & KVM_DEV_IRQ_ASSIGN_ENABLE_MSIX)) {
+ /* Guest disable MSI-X */
+ kvm_free_assigned_irq(kvm, adev);
+ if (msi2intx) {
+ pci_enable_msi(adev->dev);
+ if (adev->dev->msi_enabled)
+ return assigned_device_update_msi(kvm,
+ adev, airq);
+ }
+ return assigned_device_update_intx(kvm, adev, airq);
+ }
+
+ /* host_msix_entries and guest_msix_entries should have been
+ * initialized */
+ if (adev->entries_nr == 0)
+ return -EINVAL;
+
+ kvm_free_assigned_irq(kvm, adev);
+
+ r = pci_enable_msix(adev->dev, adev->host_msix_entries,
+ adev->entries_nr);
+ if (r)
+ return r;
+
+ for (i = 0; i < adev->entries_nr; i++) {
+ r = request_irq((adev->host_msix_entries + i)->vector,
+ kvm_assigned_dev_intr, 0,
+ "kvm_assigned_msix_device",
+ (void *)adev);
+ if (r)
+ return r;
+ }
+ }
+
+ adev->irq_requested_type |= KVM_ASSIGNED_DEV_MSIX;
+
+ return 0;
+}
+#endif
+
static int kvm_vm_ioctl_assign_irq(struct kvm *kvm,
struct kvm_assigned_irq
*assigned_irq)
@@ -417,12 +491,24 @@ static int kvm_vm_ioctl_assign_irq(struct kvm *kvm,
}
}
- if ((match->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI) &&
+ if (match->irq_requested_type & KVM_ASSIGNED_DEV_MSIX)
+ current_flags |= KVM_DEV_IRQ_ASSIGN_ENABLE_MSIX;
+ else if ((match->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI) &&
(match->irq_requested_type & KVM_ASSIGNED_DEV_GUEST_MSI))
current_flags |= KVM_DEV_IRQ_ASSIGN_ENABLE_MSI;
changed_flags = assigned_irq->flags ^ current_flags;
+#ifdef __KVM_HAVE_MSIX
+ if (changed_flags & KVM_DEV_IRQ_ASSIGN_MSIX_ACTION) {
+ r = assigned_device_update_msix(kvm, match, assigned_irq);
+ if (r) {
+ printk(KERN_WARNING "kvm: failed to execute "
+ "MSI-X action!\n");
+ goto out_release;
+ }
+ } else
+#endif
if ((changed_flags & KVM_DEV_IRQ_ASSIGN_MSI_ACTION) ||
(msi2intx && match->dev->msi_enabled)) {
#ifdef CONFIG_X86