Symbol: VFIO_DEVICE_IOEVENTFD_SIZE_MASK
drivers/vfio/pci/vfio_pci_core.c
1543
if (ioeventfd.flags & ~VFIO_DEVICE_IOEVENTFD_SIZE_MASK)
drivers/vfio/pci/vfio_pci_core.c
1546
count = ioeventfd.flags & VFIO_DEVICE_IOEVENTFD_SIZE_MASK;