From jakeo@microsof ... Subject [PATCH 0/6] Front-end driver for PCIe Pass-through on Hyper-V Date Thu, 11 Jun 2015 16:22:21 +0000 From: Jake Oshins <jakeo@microsoft.com>



This patch does some slight refactoring on the hv_vmbus driver and its

dependents and then introduces a new paravirtual front-end driver for PCI

which supports PCI Express devices passed through to a Linux guest running

in a Hyper-V VM.



To support this front-end, several new mechanisms are introduced:



1 - A common way of finding free memory-mapped I/O space in a Hyper-V VM,

available to all Hyper-V-related drivers.



2 - A way of handling PCI Message-Signaled Interrupt (MSI and MSI-X)

creation and formatting when Hyper-V is running.



3 - A mapping function from Linux processor number to Hyper-V virtual

processor number, available to drivers, which is necessary for MSI(-X)

creation.



The Hyper-V Frame Buffer driver is modified to use the MMIO space

allocation function so that its allocations both don't collide with the

PCI front end and so that the chosen range can come from any available

part of MMIO space.



Finally, the new PCI front-end driver is the last patch in the series.



Jake Oshins (6):

drivers:hv: Modify vmbus to search for all MMIO ranges available

drivers:hv: Move MMIO range picking from hyper_fb.mod to hv_vmbus.mod

arch:x86:hv: Add mechanism for Hyper-V paravirt drivers to hook msi

message creation

drivers:hv: Export a function that maps Linux proc num onto Hyper-V

proc num

drivers:hv: Define the channel type for Hyper-V PCI Express

pass-through

drivers:pci:hv: New paravirtual PCI front-end for Hyper-V VMs



MAINTAINERS | 1 +

arch/x86/include/asm/mshyperv.h | 2 +

arch/x86/kernel/cpu/mshyperv.c | 30 +

drivers/hv/vmbus_drv.c | 208 +++-

drivers/pci/Kconfig | 9 +

drivers/pci/host/Makefile | 1 +

drivers/pci/host/hv_pcifront.c | 2177 +++++++++++++++++++++++++++++++++++++++

drivers/video/fbdev/hyperv_fb.c | 46 +-

include/linux/hyperv.h | 38 +-

9 files changed, 2469 insertions(+), 43 deletions(-)

create mode 100644 drivers/pci/host/hv_pcifront.c



--

1.9.1







