On Thu, Sep 07, 2023 at 10:04:10PM -0600, Alex Williamson wrote: > > I think it really depends on what the qemu side wants to do.. > > Ok, I thought you had been one of the proponents of the fake BAR > approach as more resembling CXL. Do we need to reevaluate that the > tinkering with the VM machine topology and firmware tables would better > align to a device specific region that QEMU inserts into the VM address > space so that bare metal and virtual machine versions of this device > look more similar? Thanks, Yes, providing something to a VM that doesn't look anything like the underlying hardware feels pretty strange.