Virtual LPC Controller

[udosteinberg]

Some guest VM drivers for direct-assigned (pass-through) PCI devices attempt to identify the hardware chipset type by looking at the LPC controller. Passing the physical LPC controller through to VMs is not recommended for security reasons, especially because multiple VMs may want to access it.

Seoul should implement a virtual LPC controller for each VM that has direct-assigned PCI devices and should configure the virtual LPC controller as follows:

• PCI vendor and device ID should match that of the physical LPC controller
• Device type should be ISA bridge
• B:D:F should be 0:1f:0