diff options
| author | Matthew Rosato <mjrosato@linux.ibm.com> | 2023-11-10 12:51:08 -0500 |
|---|---|---|
| committer | Thomas Huth <thuth@redhat.com> | 2023-11-13 11:35:47 +0100 |
| commit | 8011b508cf0ddbdbda03820f4fa6cd484a6d9aed (patch) | |
| tree | 7d54b744e723ac8864497690d4315ce9b9da41fe | |
| parent | 0ab35658401a2e0a411ce0d1836a4f509bde717a (diff) | |
s390x/pci: only limit DMA aperture if vfio DMA limit reported
If the host kernel lacks vfio DMA limit reporting, do not attempt
to shrink the guest DMA aperture.
Fixes: df202e3ff3 ("s390x/pci: shrink DMA aperture to be bound by vfio DMA limit")
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Message-ID: <20231110175108.465851-3-mjrosato@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
| -rw-r--r-- | hw/s390x/s390-pci-vfio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/s390x/s390-pci-vfio.c b/hw/s390x/s390-pci-vfio.c index e28573b593..7dbbc76823 100644 --- a/hw/s390x/s390-pci-vfio.c +++ b/hw/s390x/s390-pci-vfio.c @@ -136,7 +136,7 @@ static void s390_pci_read_base(S390PCIBusDevice *pbdev, * to the guest based upon the vfio DMA limit. */ vfio_size = pbdev->iommu->max_dma_limit << TARGET_PAGE_BITS; - if (vfio_size < (cap->end_dma - cap->start_dma + 1)) { + if (vfio_size > 0 && vfio_size < cap->end_dma - cap->start_dma + 1) { pbdev->zpci_fn.edma = cap->start_dma + vfio_size - 1; } } |