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2017-04-20PCI: Add sysfs sriov_drivers_autoprobe to control VF driver bindingBodong Wang
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>
2014-02-19PCI: Remove unused SR-IOV VF Migration supportBjorn Helgaas
This reverts commit 74bb1bcc7dbb ("PCI: handle SR-IOV Virtual Function Migration"), removing this exported interface: pci_sriov_migration() Since pci_sriov_migration() is unused, it is impossible to schedule sriov_migration_task() or use any of the other migration infrastructure. This is based on Stephen Hemminger's patch (see link below), but goes a bit further. Link: http://lkml.kernel.org/r/20131227132710.7190647c@nehalam.linuxnetplumber.net Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: Stephen Hemminger <stephen@networkplumber.org>
2013-01-03Documentation: remove __dev* attributes.Greg Kroah-Hartman
CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, __devinitdata, __devinitconst, and __devexit from the kernel documentation. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton <wfp5p@virginia.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-28PCI: SRIOV control and status via sysfs (documentation)Donald Dutile
Add documentation of new sysfs files and new pci_driver SRIOV configuration interface. [bhelgaas: changelog] Signed-off: Donald Dutile <ddutile@redhat.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2009-03-20PCI: manual for SR-IOV user and driver developerYu Zhao
Reviewed-by: Randy Dunlap <rdunlap@xenotime.net> Reviewed-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: Yu Zhao <yu.zhao@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>