Re: [Qemu-devel] [v10][PATCH 03/10] piix: create host bridge to passthrough

[Paolo Bonzini]

On 09/02/2016 18:43, Alex Williamson wrote:
> Tiejun's email bounced, so adding Allen for comment.  Host bridge
> registers 52h, a4h, and a8h seem to be for versions of IGD prior to
> SandyBridge or just wrong.  Even the GMCH (50h) doesn't seem to be
> necessary for the VM host bridge, so I'm thinking about dropping all of
> these for vfio-based IGD assignment.  Do we know which guest drivers
> have specific dependencies on which host bridge and LPC bridge
> registers?  It would even be nice to document the standard
> registers for future maintainability.  Thanks,

I remember asking Tiejun for the same, but that was a year ago or more. :(

Paolo