linux-kernel - Re: [PATCHv2 2/2] ARM: debug: Move DEBUG_ICEDCC into the DEBUG

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 29 Sep 2011 10:42:43 +0100
From:	Will Deacon <will.deacon@....com>
To:	Stephen Boyd <sboyd@...eaurora.org>
Cc:	Russell King - ARM Linux <linux@....linux.org.uk>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	David Brown <davidb@...eaurora.org>
Subject: Re: [PATCHv2 2/2] ARM: debug: Move DEBUG_ICEDCC into the DEBUG_LL
 choice

On Thu, Sep 29, 2011 at 10:21:02AM +0100, Will Deacon wrote:
> On Thu, Sep 29, 2011 at 03:05:16AM +0100, Stephen Boyd wrote:
> > Chatting with David Brown made me realize that this patch now forces
> > ICEDCC for anybody who selects DEBUG_LL and hasn't moved to adding a
> > Kconfig in the choice menu. I'm not sure if that actually matters since
> > it may be incentive to put your machine of choice into this menu.
> > 
> > Otherwise, we may want to drop this until a later point, or just leave
> > it out of the choice menu altogether.
> 
> Given that the ICEDCC stuff shouldn't cause any other problems by having it
> enabled (that is, your kernel should still boot) then we should be alright
> leaving this as-is while platforms move over to the new scheme.

Bah, just took this for a spin on my Realview-PBX (Cortex-A9) platform and
the board won't boot unless I have a hardware debugger enabled that can
service the comms channel. This contradicts the Kconfig text which says:

	  It does include a timeout to ensure that the system does not
	  totally freeze when there is nothing connected to read.

so we certainly need to fix something!

Will
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/