diff options
| -rw-r--r-- | drivers/vfio/pci/vfio_pci_core.c | 2 | ||||
| -rw-r--r-- | include/uapi/linux/vfio.h | 3 |
2 files changed, 4 insertions, 1 deletions
diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c index a3635a8e54c8..ec7e662de033 100644 --- a/drivers/vfio/pci/vfio_pci_core.c +++ b/drivers/vfio/pci/vfio_pci_core.c @@ -1114,7 +1114,7 @@ static int vfio_pci_ioctl_get_irq_info(struct vfio_pci_core_device *vdev, if (info.index == VFIO_PCI_INTX_IRQ_INDEX) info.flags |= (VFIO_IRQ_INFO_MASKABLE | VFIO_IRQ_INFO_AUTOMASKED); - else + else if (info.index != VFIO_PCI_MSIX_IRQ_INDEX || !vdev->has_dyn_msix) info.flags |= VFIO_IRQ_INFO_NORESIZE; return copy_to_user(arg, &info, minsz) ? -EFAULT : 0; diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index 0552e8dcf0cb..1a36134cae5c 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -511,6 +511,9 @@ struct vfio_region_info_cap_nvlink2_lnkspd { * then add and unmask vectors, it's up to userspace to make the decision * whether to allocate the maximum supported number of vectors or tear * down setup and incrementally increase the vectors as each is enabled. + * Absence of the NORESIZE flag indicates that vectors can be enabled + * and disabled dynamically without impacting other vectors within the + * index. */ struct vfio_irq_info { __u32 argsz; |