From mboxrd@z Thu Jan 1 00:00:00 1970 From: john.stultz@linaro.org (John Stultz) Date: Tue, 01 Oct 2013 09:21:52 -0700 Subject: Status of ARM FIQ? In-Reply-To: References: , <20131001092623.GA2640@localhost.localdomain> Message-ID: <524AF6A0.5060206@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 10/01/2013 09:04 AM, Bird, Tim wrote: > On Tuesday, October 01, 2013 2:26 AM, Dave Martin [Dave.Martin at arm.com] wrote: >> John Stultz has been working on the FIQ debugger for Android and may >> have some ideas. > The CE WG is considering sponsoring some work on the FIQ debugger, and > some Sony teams are still very interested in this getting mainlined all the way. > (though not the mobile phone team, for the reasons you mention - I'm pretty sure > that FIQ is not available to us in that product segment.) > > Thanks very much for the info (to all who responded). > > John, > > Do you know the status of this? Wasn't Anton Vorontsov working on this last year? > Does anyone know what the current status of that is? Right, Anton was working on enabling an FIQ mode kdb (along with modifications to kdb to provide a safe kiosk mode), in order to replace Android's FIQ debugger. The patches were sent to the lists and various maintainers a number of times to almost no response. Sadly for us, Anton went back to school, so the effort has stalled. I tried to resubmit the patches (without deeply understanding them), but again it didn't seem to get maintainer interest and the few questions that did arise I wasn't able to answer effectively. Its still on our todo list, and I'd love to see some progress on it, but I just haven't been able to commit the time myself. If anyone wants to take a look at it, Anton's work can be found here: FIQ KDB: git://git.linaro.org/people/jstultz/android-dev.git dev/fiq-kdb https://git.linaro.org/gitweb?p=people/jstultz/android-dev.git;a=shortlog;h=refs/heads/dev/fiq-kdb KDB Kiosk: git://git.linaro.org/people/jstultz/android-dev.git dev/kdb-kiosk https://git.linaro.org/gitweb?p=people/jstultz/android-dev.git;a=shortlog;h=refs/heads/dev/kdb-kiosk It would be interesting to also hear feedback as to how close Anton's kdb approach is to what you're thinking of trying to push upstream. thanks -john