From: Andi Kleen <ak@suse.de>
To: David Brownell <david-b@pacbell.net>
Cc: yinghai.lu@amd.com, stuge-linuxbios@cdy.org,
stepan@coresystems.de, linuxbios@linuxbios.org,
linux-usb-devel@lists.sourceforge.net,
linux-kernel@vger.kernel.org, gregkh@suse.de,
ebiederm@xmission.com
Subject: Re: [linux-usb-devel] [RFC][PATCH 0/2] x86_64 Early usb debug port support.
Date: Wed, 6 Dec 2006 22:24:33 +0100 [thread overview]
Message-ID: <200612062224.33482.ak@suse.de> (raw)
In-Reply-To: <20061206211734.78DCB1E75FF@adsl-69-226-248-13.dsl.pltn13.pacbell.net>
\
> - 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.
>
> It's analagous to debugging an embedded box using a serial console
> with a Linux host ... except the target here is a PC, not an ARM
> (or PPC, MIPS, etc) custom board.
>
>
> Once the coexistence issues between the debug port and normal EHCI
> driver get worked, there's no reason not to keep using that debug
> port as a system console.
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()
-Andi
next prev parent reply other threads:[~2006-12-06 21:24 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-06 20:43 [linux-usb-devel] [RFC][PATCH 0/2] x86_64 Early usb debug port support Lu, Yinghai
2006-12-06 20:58 ` Andi Kleen
2006-12-06 21:12 ` Eric W. Biederman
2006-12-06 21:17 ` David Brownell
2006-12-06 21:24 ` Andi Kleen [this message]
2006-12-06 21:37 ` Eric W. Biederman
2006-12-06 21:59 ` Andi Kleen
2006-12-06 23:47 ` David Brownell
-- strict thread matches above, loose matches on Subject: below --
2006-12-06 21:08 Lu, Yinghai
2006-12-01 18:55 [LinuxBIOS] #57: libusb host program for PLX NET20DC debug device Lu, Yinghai
2006-12-03 15:49 ` Eric W. Biederman
2006-12-04 5:09 ` [RFC][PATCH 0/2] x86_64 Early usb debug port support Eric W. Biederman
[not found] ` <200612042001.09808.david-b@pacbell.net>
2006-12-05 11:01 ` [linux-usb-devel] " Eric W. Biederman
2006-12-06 17:31 ` Andi Kleen
2006-12-05 11:18 ` Eric W. Biederman
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