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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, 25 May 2023 at 09:30:27, Catalin Marinas wrote: > Hi David, Hi Catalin, thanks for the detailed comments. I'm finally coming around... The multi-core issues, and having to drop into kernel mode for the DC IVAC eliminates any possible advantage this avenue of investigation could have yielded. > Your best bet is Normal Non-cacheable here. Yes, we'll stay with Normal_NC. BTW the Cortex A72 issues these as ReadNoSnoop / WriteNoSnoop, so that's why they made it through the NOC. > On newer architecture > versions Arm introduced ST64B/LD64B for similar performance reasons > (FEAT_LS64 in Armv8.7) but I don't think there's hardware yet. That's very interesting. Something to look forward to. Thanks again for your time. Both you and Ard. I appreciate it. Regards, David. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel