[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