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authorBodong Wang <bodong@mellanox.com>2017-04-13 00:51:40 +0200
committerBjorn Helgaas <bhelgaas@google.com>2017-04-20 15:53:51 +0200
commit0e7df22401a3dfd403b26dea62dd00e0598b538b (patch)
tree484063ef8f232bf8d51d998a1331513a9f2c8b5a /drivers/watchdog/rt2880_wdt.c
parentPCI: Avoid FLR for Intel 82579 NICs (diff)
downloadlinux-0e7df22401a3dfd403b26dea62dd00e0598b538b.tar.xz
linux-0e7df22401a3dfd403b26dea62dd00e0598b538b.zip
PCI: Add sysfs sriov_drivers_autoprobe to control VF driver binding
Sometimes it is not desirable to bind SR-IOV VFs to drivers. This can save host side resource usage by VF instances that will be assigned to VMs. Add a new PCI sysfs interface "sriov_drivers_autoprobe" to control that from the PF. 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 this must be done before enabling VFs. The change will not take effect if VFs are already enabled. Simply, one can disable VFs by setting sriov_numvfs to 0, choose whether to probe or not, and then re-enable the VFs by restoring sriov_numvfs. [bhelgaas: changelog, ABI doc] Signed-off-by: Bodong Wang <bodong@mellanox.com> Signed-off-by: Eli Cohen <eli@mellanox.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/watchdog/rt2880_wdt.c')
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