Re: [LinuxBIOS] [linux-usb-devel] [RFC][PATCH 0/2] x86_64 Early usb debug port support.

Andi Kleen  writes:
> \
> > Host, to which that console connects (through the debug device);
> > runs usb_debug, much like any other usb-serial device
>
> My understanding was that the client could run in user 
> space only on top of libusb.

Looks like a normal serial port with greg's patch.
I still need to try it though.
> One reason is the one I covered in my last mail -- locking of the PCI
> type 1 ports.
>
> However I suppose it would be ok to switch Eric's code between early
> pci access and locked one once the PCI subsystem is up and running.
> Just don't forget bust_spinlocks()

No pci access on that path.

Eric