PCI: initialize and release SR-IOV capability

If a device has the SR-IOV capability, initialize it (set the ARI
Capable Hierarchy in the lowest numbered PF if necessary; calculate
the System Page Size for the VF MMIO, probe the VF Offset, Stride
and BARs). A lock for the VF bus allocation is also initialized if
a PF is the lowest numbered PF.

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>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index 2a4501dd2515..fdc864f9cf23 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -59,3 +59,13 @@ config HT_IRQ
            This allows native hypertransport devices to use interrupts.
 
            If unsure say Y.
+
+config PCI_IOV
+        bool "PCI IOV support"
+        depends on PCI
+        help
+          I/O Virtualization is a PCI feature supported by some devices
+          which allows them to create virtual devices which share their
+          physical resources.
+
+          If unsure, say N.