[Xen-devel] [PATCH V4 00/10] Xen PCI Passthrough

[Anthony PERARD <anthony.perard@xxxxxxxxxx>]

Hi all,

This patch series introduces the PCI passthrough for Xen.

First, we have HostPCIDevice that help to access one PCI device of the host.

Then, there is an additions in the QEMU code, pci_check_bar_overlap.

There are also several change in pci_ids and pci_regs.

Last part, but not least, the PCI passthrough device himself. Cut in 3 parts
(or file), there is one to take care of the initialisation of a passthrough
device. The second one handle everything about the config address space, there
are specifics functions for every config register. The third one is to handle
MSI.

There is a patch series on xen-devel (applied to xen-unstable) that add the
support of setting a PCI passthrough device through QMP from libxl (xen tool
stack). It is just a call to device_add, with the driver parametter
hostaddr="0000:00:1b.0".


Change since v3:
  - host_pci_get_* can now return an error, and take an extra parameter, a
    pointer to store the wanted value.
  - The memory_region for the PCI BAR are handled "manualy" because calling
    pci_default_write_config was not possible, because the XenPT handle the
    PCIIORegion it self. This make possible to do a device_remove.
  - Introduction of PT_ERR and PT_WARN macro to print debug and error messages.
    Also, these macro as well as PT_LOG will always print the short BDF of the
    device in the guest point of view.
  - PT_ERR is print by default (for all error messages).
  - Some debug/error message have been improve and should be a bit more useful.
  - hw_error have been removed from the code, and have been replaced by either
    a call to qemu_system_shudown_request() (that lead to a domain destroy) or
    a failed in the initialisation of the device.
  - Now, every patchs should compile with no error.


Change v2-v3;
  - in host-pci-device.c:
    - Return more usefull error code in get_ressource().
    - Use macro in host_pci_find_ext_cap_offset instead of raw number. But I
      still not sure if PCI_MAX_EXT_CAP is right, it's result is 480 like it
      was before, so it's maybe ok.
  - All use of MSI stuff in two first pci passthrough patch have been removed
    and move to the last patch.


Change v1-v2:
  - fix style issue (checkpatch.pl)
  - set the original authors, add some missing copyright headers
  - HostPCIDevice:
    - introduce HostPCIIORegions (with base_addr, size, flags)
    - save all flags from ./resource and store it in a separate field.
    - fix endianess on write
    - new host_pci_dev_put function
    - use pci.c like interface host_pci_get/set_byte/word/long (instead of
      host_pci_read/write_)
  - compile HostPCIDevice only on linux (as well as xen_pci_passthrough)
  - introduce apic-msidef.h file.
  - no more run_one_timer, if a pci device is in the middle of a power
    transition, just "return an error" in config read/write
  - use a global var mapped_machine_irq (local to xen_pci_passthrough.c)
  - add msitranslate and power-mgmt ad qdev property



Allen Kay (2):
  Introduce Xen PCI Passthrough, qdevice (1/3)
  Introduce Xen PCI Passthrough, PCI config space helpers (2/3)

Anthony PERARD (6):
  pci_ids: Add INTEL_82599_VF id.
  pci_regs: Fix value of PCI_EXP_TYPE_RC_EC.
  pci_regs: Add PCI_EXP_TYPE_PCIE_BRIDGE
  configure: Introduce --enable-xen-pci-passthrough.
  Introduce HostPCIDevice to access a pci device on the host.
  Introduce apic-msidef.h

Jiang Yunhong (1):
  Introduce Xen PCI Passthrough, MSI (3/3)

Yuji Shimada (1):
  pci.c: Add pci_check_bar_overlap

 Makefile.target                      |    6 +
 configure                            |   25 +
 hw/apic-msidef.h                     |   30 +
 hw/apic.c                            |   11 +-
 hw/host-pci-device.c                 |  279 ++++
 hw/host-pci-device.h                 |   75 +
 hw/pci.c                             |   47 +
 hw/pci.h                             |    3 +
 hw/pci_ids.h                         |    1 +
 hw/pci_regs.h                        |    3 +-
 hw/xen_common.h                      |    3 +
 hw/xen_pci_passthrough.c             |  902 ++++++++++++
 hw/xen_pci_passthrough.h             |  337 +++++
 hw/xen_pci_passthrough_config_init.c | 2637 ++++++++++++++++++++++++++++++++++
 hw/xen_pci_passthrough_msi.c         |  678 +++++++++
 xen-all.c                            |   12 +
 16 files changed, 5038 insertions(+), 11 deletions(-)
 create mode 100644 hw/apic-msidef.h
 create mode 100644 hw/host-pci-device.c
 create mode 100644 hw/host-pci-device.h
 create mode 100644 hw/xen_pci_passthrough.c
 create mode 100644 hw/xen_pci_passthrough.h
 create mode 100644 hw/xen_pci_passthrough_config_init.c
 create mode 100644 hw/xen_pci_passthrough_msi.c

-- 
Anthony PERARD


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