commit 4daace0d8ce851f8f8f91563c835e3000c954d5e
author Jake Oshins <jakeo@microsoft.com> Tue Feb 16 21:56:23 2016 +0000
committer Bjorn Helgaas <bhelgaas@google.com> Tue Feb 16 16:56:12 2016 -0600
tree f2b648fb723a02e4a5da2673d48b73c4077a419a
parent 788858ebc49a07fe5f812778f245a51b0d800d82

PCI: hv: Add paravirtual PCI front-end for Microsoft Hyper-V VMs

Add a new driver which exposes a root PCI bus whenever a PCI Express device
is passed through to a guest VM under Hyper-V.  The device can be single-
or multi-function.  The interrupts for the devices are managed by an IRQ
domain, implemented within the driver.

[bhelgaas: fold in race condition fix (http://lkml.kernel.org/r/1456340196-13717-1-git-send-email-jakeo@microsoft.com)]
Signed-off-by: Jake Oshins <jakeo@microsoft.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/pci/Kconfig

diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index 73de4ef..54a5441 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -118,4 +118,11 @@
 	def_bool y if (DMI || ACPI)
 	select NLS
 
+config PCI_HYPERV
+        tristate "Hyper-V PCI Frontend"
+        depends on PCI && X86 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && X86_64
+        help
+          The PCI device frontend driver allows the kernel to import arbitrary
+          PCI devices from a PCI backend to support PCI driver domains.
+
 source "drivers/pci/host/Kconfig"