Em Thu, 06 Dec 2018 18:18:23 +0100 Markus Dobel <markus.dobel@xxxxxx> escreveu: > Hi everyone, > > I will try if the hack mentioned fixes the issue for me on the weekend (but I assume, as if effectively removes the function). It should, but it keeps a few changes. Just want to be sure that what would be left won't cause issues. If this works, the logic that would solve Ryzen DMA fixes will be contained into a single point, making easier to maintain it. > > Just in case this is of interest, I neither have Ryzen nor Intel, but an HP Microserver G7 with an AMD Turion II Neo N54L, so the machine is more on the slow side. Good to know. It would probably worth to check if this Ryzen bug occors with all versions of it or with just a subset. I mean: maybe it is only at the first gen or Ryzen and doesn't affect Ryzen 2 (or vice versa). The PCI quirks logic will likely need to detect the PCI ID of the memory controllers found at the buggy CPUs, in order to enable the quirk only for the affected ones. It could be worth talking with AMD people in order to be sure about the differences at the DMA engine side. Thanks, Mauro
