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It is triggered by pinot{0,1} which is AMD > Fam15h (AMD Opteron(tm) Processor 3350 HE). Just re-checked this in order to be sure, and no, the IOMMU faults are already there prior to XSA-442 for the dom0pvh tests, but they don't cause issues to osstest, and hence we didn't realize. I just came across those as I was triaging a different issue and looking at the serial log. Hence I won't add any mentions to XSA-442 in the commit message. Thanks, Roger.