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1 .. SPDX-License-Identifier: GPL-2.0
9 :Authors: - Yu Zhao <yu.zhao@intel.com>
10 - Donald Dutile <ddutile@redhat.com>
15 What is SR-IOV
16 --------------
18 Single Root I/O Virtualization (SR-IOV) is a PCI Express Extended
22 Allocation of the VF can be dynamically controlled by the PF via
25 turned on, each VF's PCI configuration space can be accessed by its own
28 operates on the register set so it can be functional and appear as a
34 How can I enable SR-IOV capability
35 ----------------------------------
37 Multiple methods are available for SR-IOV enablement.
39 enabling and disabling of the capability via API provided by SR-IOV core.
40 If the hardware has SR-IOV capability, loading its PF driver would
44 enable and disable the VFs associated with a PCIe PF. This method
45 enables per-PF, VF enable/disable values versus the first method,
47 PCI SRIOV core support ensures that enable/disable operations are
53 How can I use the Virtual Functions
54 -----------------------------------
56 The VF is treated as hot-plugged PCI devices in the kernel, so they
63 SR-IOV API
64 ----------
66 To enable SR-IOV capability:
79 To disable SR-IOV capability:
91 command below before enabling SR-IOV capabilities. This is the
98 To disable auto probing VFs by a compatible driver on the host, run
99 command below before enabling SR-IOV capabilities. Updating this
107 -------------
109 Following piece of code illustrates the usage of the SR-IOV API.
164 .name = "SR-IOV Physical Function driver",