On Tue, 8 Dec 2015, Gerd Hoffmann wrote: > Hi, > > We have some code in our tree to support pci passthrough of intel > graphics devices (igd) on xen, which requires some chipset tweaks > for (a) the host bridge and (b) the lpc/isa-bridge to meat the > expectations of the guest driver. For kvm we need pretty much > the same, also the requirements for vgpu (xengt/kvmgt) are very > simliar. > > This patch series tackles (a) only, (b) will follow later. It > wires up the igd-passthru machine option for tcg/kvm too, moves > the code to its own file so it is nicely separated, fixes a bunch > of issues and finally adds q35 support. > > This patch series has seen very light testing, basically doing > lspci in the guest to check whenever pci config space got updated > correctly. Trying actual device assignment needs more pieces > being in place. But I suspect even that is more testing than > the code has seen on xen so far (see patch #6 ...).
I for one don't have a setup to be able to test this at the moment. But I would appreciate if this kind of changes were Tested-by Tiejun Chen. > Gerd Hoffmann (7): > pc: wire up TYPE_IGD_PASSTHROUGH_I440FX_PCI_DEVICE for !xen > pc: move igd support code to igd.c > igd: switch TYPE_IGD_PASSTHROUGH_I440FX_PCI_DEVICE to realize > igd: TYPE_IGD_PASSTHROUGH_I440FX_PCI_DEVICE: call parent realize > igd: use defines for standard pci config space offsets > igd: revamp host config read > igd: add q35 support > > hw/i386/pc_piix.c | 11 ++-- > hw/pci-host/Makefile.objs | 3 ++ > hw/pci-host/igd.c | 132 > ++++++++++++++++++++++++++++++++++++++++++++++ > hw/pci-host/piix.c | 88 ------------------------------- > hw/pci-host/q35.c | 6 ++- > 5 files changed, 145 insertions(+), 95 deletions(-) > create mode 100644 hw/pci-host/igd.c > > -- > 1.8.3.1 > >
