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Add GVT-d support #7
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build: add full_static option in compile_qemu_nyx.sh script
On Q35+ICH9, LPC sits at 0:1f.0. Force creating dummy LPC will override ICH9 LPC on 0:1f.0. Thus breaking ICH9 functionality. Some guest doesn't rely on PCH on 1f.0, thus it's still possible to enable IGD legacy mode for Q35 without the dummp LPC as i440FX. Signed-off-by: Colin Xu <colin.xu@intel.com>
Also pass the stolen info to fw_cfg so that OVMF can reserve according. Signed-off-by: Hang Yuan <hang.yuan@intel.com> Signed-off-by: Colin Xu <colin.xu@intel.com>
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Reimplemented x86_64 page table walking code.
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Summary
This set of patches enables GVT-d for Intel integrated GPUs in QEMU. This allows for passing an integrated GPU to a VM guest. It is intended for use with a Q35 machine type.
Dependencies
Add the following to your kernel command line (replace xxxx with iGPU device ID):
intel_iommu=on iommu=pt video=efifb:off nofb vfio-pci.ids=8086:xxxxCreate /etc/modprobe.d/blacklist-i915.conf with the following contents:
blacklist snd_hda_intelblacklist snd_hda_codec_hdmiblacklist i915Use the following QEMU arguments (GOP_GVTD.rom is our OPROM):
-display none -vga none -device vfio-pci,host=00:02.0,x-igd-gms=2,id=hostdev0,bus=pcie.0,addr=2,x-igd-opregion=on,romfile=GOP_GVTD.rom,driver=vfio-pci-nohotplugNotes
You will need to change the PCH device ID to match the host platform in hw/isa/lpc_ich9.c.
An example for TGL:
k->device_id = PCI_DEVICE_ID_INTEL_ICH9_8;to
k->device_id = 0xA080;