[PATCH 0/4] Virtio non-discoverable devices

[Daniil Egranov <daniil.egranov@arm.com>]

This is an attempt to add MMIO Virtio devices into the
non-discoverable device registration procedure and allow
Virtio PCI drivers to recognize and program such devices 
correctly.
The main issue is that the set of MMIO registers is different
from PCI, plus the width of similar registers are not 
always the same. The code implements the translation of 
the PCI IO registers to MMIO registers. 
Another difference between PCI and MMIO Virtio devices found 
during the testing is that MMIO devices may require more 
registers to be programmed compared to PCI. The VirtioPciDeviceDxe
was patched to detect non-discoverable MMIO devices and allow
calling a PCI MemIo protocol function.

This set of patches was tested with MMIO Virtio Block and
Virtio Net devices.

Daniil Egranov (4):
  MdeModulePkg: Added new Virtio non-discoverable type and GUID
  NonDiscoverableDeviceRegistrationLib: Added Virtio support
  NonDiscoverablePciDeviceDxe: Added MMIO Virtio support
  VirtioPciDeviceDxe: Added non-discoverable Virtio support

 .../NonDiscoverablePciDeviceDxe.c                  |   3 +-
 .../NonDiscoverablePciDeviceDxe.inf                |   5 +-
 .../NonDiscoverablePciDeviceIo.c                   | 240 ++++++++++++++++++++-
 MdeModulePkg/Include/Guid/NonDiscoverableDevice.h  |   3 +
 .../Library/NonDiscoverableDeviceRegistrationLib.h |   1 +
 .../NonDiscoverableDeviceRegistrationLib.c         |   3 +
 .../NonDiscoverableDeviceRegistrationLib.inf       |   1 +
 MdeModulePkg/MdeModulePkg.dec                      |   1 +
 OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.c       | 143 +++++++++++-
 OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.h       |  21 +-
 OvmfPkg/VirtioPciDeviceDxe/VirtioPciDeviceDxe.inf  |   4 +-
 OvmfPkg/VirtioPciDeviceDxe/VirtioPciFunctions.c    | 117 +++++++++-
 12 files changed, 528 insertions(+), 14 deletions(-)

-- 
2.11.0