On Thu, 20 Sep 2012, Linus Walleij wrote: > On Thu, Sep 20, 2012 at 2:03 AM, Paul E. McKenney > <paul...@linux.vnet.ibm.com> wrote: > > > Any thoughts on the feasibility of implementing NMI-based stack backtraces > > for ARM? > > Nico's department, so let's page him.
That _could_ be done, at least in theory, with some restrictions. However in practice ... > In IIRC ux500 all NMIs are reserved for the secure world, so it's > basically a no can do. :-( That's the main issue here: not all platforms allow FIQs ( a FIQ is the closest to a NMI on ARM) to be available to the operating system. However, for where this is possible, there is a patch series from Anton Vorontsov implementing FIQ based KGDB support which might be useful here. Nicolas -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
