[PATCH v1 00/23] Q35 support for Xen

[Joel Upham <jupham125@gmail.com>]

These are the Qemu changes needed to support the q35 chipset for xen
I based the patches from 2017 found on the mailing list here:
https://lists.xenproject.org/archives/html/xen-devel/2018-03/msg01176.html

I have been using a version of these patches on Xen 4.16 with Qemu
version 4.1 for over 6 months.  The guest VMs are very stable, and PCIe
PT is working as was designed (all of the PCIe devices are on the root
PCIe device).  I have successfully passed through GPUs, NICs, etc. I was
asked by those in the community to attempt to once again upstream the
patches.  I have them working with Seabios and OVMF (patches are needed
to OVMF which I will be sending to the mailing list). The Qemu patches 
allow for the xenvbd to properly unplug the AHCI SATA device, and all 
xen pv windows drivers work as intended.

I used the original author of the patches to get a majority of this to work:
Alexey Gerasimenko.  I fixed the patches to be in line with the upstream
Qemu and Xen versions.  Any original issues may still exist; however, I
am sure in time they can be improved. If the code doesn't exist then they
can't be actively looked at by the community.

I am not an expert on the Q35 chipset or PCIe technology.  This is my
first patch to this mailing list.


Joel Upham (23):
  pc/xen: Xen Q35 support: provide IRQ handling for PCI devices
  pc/q35: Apply PCI bus BSEL property for Xen PCI device hotplug
  q35/acpi/xen: Provide ACPI PCI hotplug interface for Xen on Q35
  q35/xen: Add Xen platform device support for Q35
  q35: Fix incorrect values for PCIEXBAR masks
  xen/pt: XenHostPCIDevice: provide functions for PCI Capabilities and
    PCIe Extended Capabilities enumeration
  xen/pt: avoid reading PCIe device type and cap version multiple times
  xen/pt: determine the legacy/PCIe mode for a passed through device
  xen/pt: Xen PCIe passthrough support for Q35: bypass PCIe topology
    check
  xen/pt: add support for PCIe Extended Capabilities and larger config
    space
  xen/pt: handle PCIe Extended Capabilities Next register
  xen/pt: allow to hide PCIe Extended Capabilities
  xen/pt: add Vendor-specific PCIe Extended Capability descriptor and
    sizing
  xen/pt: add fixed-size PCIe Extended Capabilities descriptors
  xen/pt: add AER PCIe Extended Capability descriptor and sizing
  xen/pt: add descriptors and size calculation for
    RCLD/ACS/PMUX/DPA/MCAST/TPH/DPC PCIe Extended Capabilities
  xen/pt: add Resizable BAR PCIe Extended Capability descriptor and
    sizing
  xen/pt: add VC/VC9/MFVC PCIe Extended Capabilities descriptors and
    sizing
  xen/pt: Fake capability id
  xen platform: unplug ahci object
  pc/q35: setup q35 for xen
  qdev-monitor/pt: bypass root device check
  s3 support: enabling s3 with q35

 hw/acpi/ich9.c                |   22 +-
 hw/acpi/pcihp.c               |    6 +-
 hw/core/machine.c             |   19 +
 hw/i386/pc_piix.c             |    3 +-
 hw/i386/pc_q35.c              |   39 +-
 hw/i386/xen/xen-hvm.c         |    7 +-
 hw/i386/xen/xen_platform.c    |   19 +-
 hw/isa/lpc_ich9.c             |   53 +-
 hw/isa/piix3.c                |    2 +-
 hw/pci-host/q35.c             |   28 +-
 hw/pci/pci.c                  |   17 +
 hw/xen/xen-host-pci-device.c  |  106 +++-
 hw/xen/xen-host-pci-device.h  |    6 +-
 hw/xen/xen_pt.c               |   49 +-
 hw/xen/xen_pt.h               |   18 +-
 hw/xen/xen_pt_config_init.c   | 1103 ++++++++++++++++++++++++++++++---
 include/hw/acpi/pcihp.h       |    2 +
 include/hw/boards.h           |    1 +
 include/hw/i386/pc.h          |    3 +
 include/hw/pci-host/q35.h     |    4 +-
 include/hw/pci/pci.h          |    3 +
 include/hw/southbridge/ich9.h |    1 +
 include/hw/xen/xen.h          |    4 +-
 qemu-options.hx               |    1 +
 softmmu/qdev-monitor.c        |    4 +-
 stubs/xen-hw-stub.c           |    4 +-
 26 files changed, 1394 insertions(+), 130 deletions(-)

-- 
2.34.1