无法在vfio pci设备的文件描述符上使用pread

So I'm working with qemu kvm for a while and now I need to passthrough PCI devices. I did all required procedures to make this work: enabled iommu, modprobed vfio module, binded device to vfio and checked that vfio group was indeed created, etc... But when I start qemu with any pci devices I get the error message:So I'm working with qemu kvm for a while and no