[PATCH v4 0/7] PCI: hv: New paravirtual PCI front-end for Hyper-V VMs

[jakeo]

From: Jake Oshins <jakeo@xxxxxxxxxxxxx>

This patch series incorporates feedback from Gerry Liu
(jiang.liu@xxxxxxxxxxxxxxx).

First, export functions that allow correlating Hyper-V virtual processors
and Linux cpus, along with the means for invoking a hypercall that targets
interrupts at chosen vectors on specfic cpus.

Second, mark various parts of IRQ domain related code as exported, so that
this PCI front-end can implement an IRQ domain as part of a module.  (The
alternative would be to pull all this into the kernel, which would pull
in a lot of other Hyper-V related code, as this IRQ domain depends on
hv_vmbus.ko.)

Third, modify PCI so that new root PCI buses can be marked with an associated
fwnode_handle, and so that root PCI buses can look up their associated IRQ
domain by that handle.

Fourth, introduce a new driver, hv_pcifront, which eposes root PCI buses in
a Hyper-V VM.  These root PCI buses expose real PCIe devices, or PCI Virtual
Functions.


Jake Oshins (7):
  drivers:hv: Export a function that maps Linux CPU num onto Hyper-V
    proc num
  drivers:hv: Export hv_do_hypercall()
  PCI: Make it possible to implement a PCI MSI IRQ Domain in a module.
  PCI: Add fwnode_handle to pci_sysdata
  PCI: irqdomain: Look up IRQ domain by fwnode_handle
  drivers:hv: Define the channel type for Hyper-V PCI Express
    pass-through
  PCI: hv: New paravirtual PCI front-end for Hyper-V VMs

 MAINTAINERS                    |    1 +
 arch/x86/include/asm/msi.h     |    4 +
 arch/x86/include/asm/pci.h     |   11 +
 arch/x86/kernel/apic/msi.c     |    5 +-
 arch/x86/kernel/apic/vector.c  |    2 +
 drivers/hv/hv.c                |   20 +-
 drivers/hv/hyperv_vmbus.h      |    2 +-
 drivers/hv/vmbus_drv.c         |   17 +
 drivers/pci/Kconfig            |    7 +
 drivers/pci/host/Makefile      |    1 +
 drivers/pci/host/hv_pcifront.c | 2267 ++++++++++++++++++++++++++++++++++++++++
 drivers/pci/msi.c              |    4 +
 drivers/pci/probe.c            |   13 +
 include/linux/hyperv.h         |   14 +
 kernel/irq/chip.c              |    1 +
 kernel/irq/irqdomain.c         |    2 +
 16 files changed, 2358 insertions(+), 13 deletions(-)
 create mode 100644 drivers/pci/host/hv_pcifront.c

-- 
1.9.1

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