diff mbox series

[5/5] Revert "vfio/pci: Disable INTx fast path if using split irqchip"

Message ID 20200226225518.217138-1-peterx@redhat.com (mailing list archive)
State New, archived
Headers show
Series vfio/pci: Fix up breakage against split irqchip and INTx | expand

Commit Message

Peter Xu Feb. 26, 2020, 10:55 p.m. UTC 
With the resamplefd list introduced, we can savely enable VFIO INTx
fast path again with split irqchip so it can still be faster than the
complete slow path.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 hw/vfio/pci.c | 12 ------------
 1 file changed, 12 deletions(-)
diff mbox series

Patch

diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 09703362df..1c0aa27386 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -124,18 +124,6 @@  static void vfio_intx_enable_kvm(VFIOPCIDevice *vdev, Error **errp)
         return;
     }
 
-    if (kvm_irqchip_is_split()) {
-        /*
-         * VFIO INTx is currently not working with split kernel
-         * irqchip for level triggered interrupts.  Go the slow path
-         * as long as split is enabled so we can be at least
-         * functional (even with poor performance).
-         *
-         * TODO: Remove this after all things fixed up.
-         */
-        return;
-    }
-
     /* Get to a known interrupt state */
     qemu_set_fd_handler(irq_fd, NULL, NULL, vdev);
     vfio_mask_single_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX);