[Qemu-devel] [v2][PATCH 0/8] xen: add Intel IGD passthrough support

[Tiejun Chen <tiejun.chen@intel.com>]

v2:

* rebase on current qemu tree.
* retrieve VGA bios from sysfs properly.
* redefine some function name.
* introduce bitmap to manage registe/runregister pci dev, and provide
  a common way to reserve some specific devfn.
* introduce is_igd_passthrough() to make sure we touch physical host
  bridge only in IGD case.
* We should return zero as an invalid address value while calling
  igd_read_opregion().

Additionally, now its also not necessary to recompile seabios with some
extra steps like v1.
 

The following patches are ported partially from Xen Qemu-traditional
branch which are adding Intel IGD passthrough supporting to Qemu upstream.

To pass through IGD to guest, user need to add following lines in Xen config
file:
gfx_passthru=1
pci=['00:02.0 <at> 2']

Now successfully boot Ubuntu 14.04 guests with IGD assigned in Haswell
desktop with Latest Xen + Qemu upstream.

----------------------------------------------------------------
Tiejun Chen (5):
      pci: use bitmap to manage registe/runregister pci device
      pci: provide a way to reserve some specific devfn
      xen, gfx passthrough: reserve 00:02.0 for INTEL IGD
      xen, gfx passthrough: create intel isa bridge
      xen, gfx passthrough: create host bridge to passthrough

Yang Zhang (3):
      xen, gfx passthrough: basic graphics passthrough support
      xen, gfx passthrough: support Intel IGD passthrough with VT-D
      xen, gfx passthrough: add opregion mapping

 hw/pci-host/piix.c           |  64 ++++++++++++++++++++-
 hw/pci/pci.c                 |  23 +++++++-
 hw/xen/Makefile.objs         |   2 +-
 hw/xen/xen-host-pci-device.c |   5 ++
 hw/xen/xen-host-pci-device.h |   1 +
 hw/xen/xen_pt.c              |  10 ++++
 hw/xen/xen_pt.h              |  12 +++-
 hw/xen/xen_pt_config_init.c  |  45 ++++++++++++++-
 hw/xen/xen_pt_graphics.c     | 435 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 include/hw/pci/pci.h         |   1 +
 include/hw/pci/pci_bus.h     |   1 +
 qemu-options.hx              |   9 +++
 vl.c                         |  11 +++-
 13 files changed, 612 insertions(+), 7 deletions(-)
 create mode 100644 hw/xen/xen_pt_graphics.c

Thanks
Tiejun