On 4/14/2017 10:37 AM, Bjorn Helgaas wrote:
On Thu, Apr 13, 2017 at 01:51:40AM +0300, bodong@xxxxxxxxxxxx wrote:
From: Bodong Wang <bodong@xxxxxxxxxxxx>
Sometimes it is not desirable to probe the virtual functions after
SRIOV is enabled. This can save host side resource usage by VF
instances which would be eventually probed to VMs.
Add a new PCI sysfs interface "sriov_drivers_autoprobe" to control
that from the PF, all current callers still retain the same
functionality. To modify it, echo 0/n/N (disable probe) or 1/y/Y
(enable probe) to:
/sys/bus/pci/devices/<DOMAIN:BUS:DEVICE.FUNCTION>/sriov_drivers_autoprobe
Note that, the choice must be made before enabling VFs. The change
will not take effect if VFs are already enabled. Simply, one can set
sriov_numvfs to 0, choose whether to probe or not, and then resume
sriov_numvfs.
Signed-off-by: Bodong Wang <bodong@xxxxxxxxxxxx>
Signed-off-by: Eli Cohen <eli@xxxxxxxxxxxx>
Reviewed-by: Gavin Shan <gwshan@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Alex Williamson <alex.williamson@xxxxxxxxxx>
Reviewed-by: Bjorn Helgaas <helgaas@xxxxxxxxxx>
Applied to pci/virtualization for v4.12, thanks, Bodong!
Thank you! Bjorn/Alex/Gavin.
