From 0ab35658401a2e0a411ce0d1836a4f509bde717a Mon Sep 17 00:00:00 2001 From: Matthew Rosato Date: Fri, 10 Nov 2023 12:51:07 -0500 Subject: [PATCH] s390x/pci: bypass vfio DMA counting when using cdev The current code assumes that there is always a vfio group, but that's no longer guaranteed with the iommufd backend when using cdev. In this case, we don't need to track the vfio dma limit anyway. Signed-off-by: Matthew Rosato Message-ID: <20231110175108.465851-2-mjrosato@linux.ibm.com> Signed-off-by: Thomas Huth --- hw/s390x/s390-pci-vfio.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/hw/s390x/s390-pci-vfio.c b/hw/s390x/s390-pci-vfio.c index 59a2e03873..e28573b593 100644 --- a/hw/s390x/s390-pci-vfio.c +++ b/hw/s390x/s390-pci-vfio.c @@ -66,6 +66,10 @@ S390PCIDMACount *s390_pci_start_dma_count(S390pciState *s, assert(vpdev); + if (!vpdev->vbasedev.group) { + return NULL; + } + id = vpdev->vbasedev.group->container->fd; if (!s390_pci_update_dma_avail(id, &avail)) {