Re: [libvirt] [question]Why libvirt bind all devices with same vendor id and device id to vfio-pci driver, and only unbind devices used by VMs to original driver?
On Mon, 9 Oct 2017 09:28:27 +0000
"Wuzongyong (Euler Dept)" <cordius.wu(a)huawei.com> wrote:
Hi,
As the title says, I thought that it's a bit unreasonable and inconsistent to unbind
devices assigned to VMs to original driver
and leave other devices binding to vfio-pci driver.
Why not to bind devices we need to vfio-pci driver instead of bind all devices with same
type to vfio-pci driver?
Or, we may can rebind devices unused with same type to original driver.
Because that's the way the kernel's new_id interface works, any
matching device without a driver will probe the new_id driver. For a
new enough kernel and libvirt, the driver_override interface should be
used instead, which will only bind the target device. Thanks,
Alex