diff options
| -rw-r--r-- | drivers/vfio/pci/vfio_pci_config.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/vfio/pci/vfio_pci_config.c b/drivers/vfio/pci/vfio_pci_config.c index 5628fe114347..91335e6de88a 100644 --- a/drivers/vfio/pci/vfio_pci_config.c +++ b/drivers/vfio/pci/vfio_pci_config.c @@ -849,11 +849,13 @@ static int __init init_pci_cap_exp_perm(struct perm_bits *perm) /* * Allow writes to device control fields, except devctl_phantom, - * which could confuse IOMMU, and the ARI bit in devctl2, which + * which could confuse IOMMU, MPS, which can break communication + * with other physical devices, and the ARI bit in devctl2, which * is set at probe time. FLR gets virtualized via our writefn. */ p_setw(perm, PCI_EXP_DEVCTL, - PCI_EXP_DEVCTL_BCR_FLR, ~PCI_EXP_DEVCTL_PHANTOM); + PCI_EXP_DEVCTL_BCR_FLR | PCI_EXP_DEVCTL_PAYLOAD, + ~PCI_EXP_DEVCTL_PHANTOM); p_setw(perm, PCI_EXP_DEVCTL2, NO_VIRT, ~PCI_EXP_DEVCTL2_ARI); return 0; } |