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Subject[PATCH v6 0/7] PCI: hv: New paravirtual PCI front-end for Hyper-V VMs
From: Jake Oshins <>

This version of this patch series incorporates feedback from Andy Shevchenko.

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

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

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 of Hyper-V PCI Express
PCI: hv: New paravirtual PCI front-end for Hyper-V VMs

arch/x86/include/asm/msi.h | 4 +
arch/x86/include/asm/pci.h | 13 +
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 | 14 +
include/asm-generic/pci.h | 4 +
include/linux/hyperv.h | 14 +
kernel/irq/chip.c | 1 +
kernel/irq/irqdomain.c | 2 +
17 files changed, 2365 insertions(+), 13 deletions(-)
create mode 100644 drivers/pci/host/hv_pcifront.c


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