答复: [RFC PATCH v2 0/7] Pseudo-NMI for arm64 using ICC_PMR_EL1 (GICv3)
From: Dingtianhong <hidden>
Date: 2015-09-22 18:08:29
________________________________________ ???: linux-arm-kernel [linux-arm-kernel-bounces at lists.infradead.org] ?? Daniel Thompson [daniel.thompson at linaro.org] ????: 2015?9?18? 19:23 ???: Jon Masters ??: linaro-kernel at lists.linaro.org; patches at linaro.org; Marc Zyngier; Catalin Marinas; linux-kernel at vger.kernel.org; Andrew Thoelke; Dave Martin; linux-arm-kernel at lists.infradead.org ??: Re: [RFC PATCH v2 0/7] Pseudo-NMI for arm64 using ICC_PMR_EL1 (GICv3) On 18/09/15 06:11, Jon Masters wrote:
quoted
On Sep 14, 2015, at 06:26, Daniel Thompson [off-list ref] wrote: This patchset provides a pseudo-NMI for arm64 kernels by reimplementing the irqflags macros to modify the GIC PMR (the priority mask register is accessible as a system register on GICv3 and later) rather than the PSR. The patchset includes an implementation of arch_trigger_all_cpu_backtrace() for arm64 allowing the new code to be exercised.I think there is a need to connect a few dots on this next week during Connect. Some other conversations have discussed alternative implementations elsewhere. I will assist.
Fine by me. I'd be very happy to talk about alternative approaches. In the past I've had long conversations about trapping to ARM TF as a means to simulate NMI. I haven't written any code to move in this direction but I still think of it as being the future-areas-of-interest pile. That said, whenever I search for (what I think are) sensible keywords for this subject I generally only find my own work! I may be selecting a rather blinkered set of keywords when I search but nevertheless it does mean I will probably have to rely on you to make introductions! Hi Daniel: I have checked that trapping to ARM TF could work well for aarch64 as NMI, and maybe we could discussion about it. :) Ding Daniel. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel at lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel