Hello Shameer,
On 6/13/23 16:09, Shameer Kolothum wrote:
When vfio_enable_vectors() returns with less than requested nr_vectors
we retry with what kernel reported back. But the retry path doesn't
call vfio_prepare_kvm_msi_virq_batch() and this results in,
qemu-system-aarch64: vfio: Error: Failed to enable 4 MSI vectors, retry with 1
qemu-system-aarch64: ../hw/vfio/pci.c:602: vfio_commit_kvm_msi_virq_batch:
Assertion `vdev->defer_kvm_irq_routing' failed
Fixes: dc580d51f7dd ("vfio: defer to commit kvm irq routing when enable
msi/msix")
Reviewed-by: Longpeng <longpe...@huawei.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.th...@huawei.com>
Looks correct to me,
Reviewed-by: Cédric Le Goater <c...@redhat.com>
Thanks,
C.
---
hw/vfio/pci.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 73874a94de..8fb2c53a63 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -663,6 +663,8 @@ static void vfio_msi_enable(VFIOPCIDevice *vdev)
vfio_disable_interrupts(vdev);
+ vdev->nr_vectors = msi_nr_vectors_allocated(&vdev->pdev);
+retry:
/*
* Setting vector notifiers needs to enable route for each vector.
* Deferring to commit the KVM routes once rather than per vector
@@ -670,8 +672,6 @@ static void vfio_msi_enable(VFIOPCIDevice *vdev)
*/
vfio_prepare_kvm_msi_virq_batch(vdev);
- vdev->nr_vectors = msi_nr_vectors_allocated(&vdev->pdev);
-retry:
vdev->msi_vectors = g_new0(VFIOMSIVector, vdev->nr_vectors);
for (i = 0; i < vdev->nr_vectors; i++) {
