In D26506#594727, @grehan wrote:

The work is at https://www.gulbra.net/freebsd-bhyve/

You'd need to extract the PCI ROM BIOS support. I can help or even do that.

Updates:

• Reuse D24066

In D26506#592106, @grehan wrote:

Generic PCI ROM BIOS support in EFI might be a better solution for this (there is a version posted in the vga-bios patches a while back), with ROM extraction being a separate issue.

Updates:

• Use an own device emulation for GVT-d
• Do not modify the current implementation of passthru devices

Fixed Issues:

1. Do not patch cfgread and cfgwrite of passthru devices:

The device emulation functions are shared by every passthru device.
If igd emulationen patches it's cfgread and cfgwrite functions, it will be changed for every passthru device too.
To avoid this, add a passthru_type to decide which function to take.

Add copyright header to new file "pci_igd_lpc.c"

Fixed Issues:

1. register_bar and unregister_bar functions doesn't handle MSI-X BAR properly

Thank's for your feedback.

Glad to hear that it works on your system.

Thanks for your detailed description.

In D26209#585065, @wanpengqian_gmail.com wrote:

I want to test this patch. Currently, I am using a Lenovo M920Q with i5 8400T, 16G RAM, and 2 SSDs.

What is PM support? I cannot find anything similar in BIOS settings.

Updates:

• Use PCI-MMIO-Space (0xC0000000 - 0xE0000000) for allocation of Opregion and Graphics Stolen Memory
• Increase size of Opregion to 16 kB
• Detect size of Graphics Stolen Memory

In D26209#582340, @grehan wrote:

The Intel ACRN edk2 fork has a GVT GOP driver that may be suitable

https://github.com/projectacrn/acrn-edk2/tree/ovmf-acrn/OvmfPkg/GvtGopDxe