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

Eric W. Biederman ebiederm at xmission.com
Wed Dec 6 22:37:29 CET 2006

Andi Kleen <ak at suse.de> 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.


More information about the coreboot mailing list