On Mon, Dec 06, 2021 at 09:42:23AM +0000, John Garry wrote: > On 29/11/2021 10:46, Ajish.Koshy@xxxxxxxxxxxxx wrote: > > Thanks John for the update. Based on the given issue, > > we never tested on arm server. > > > > Further arm testing will depend on the availability of > > the server. > > > > Meanwhile will do further test on x86 and update > > on the observations. > > Have you tested on x86 with the IOMMU enabled? From my limited experience, > out of the box the IOMMU is disabled in the BIOS on x86 machines - that is a > very general statement. But this is not just an issue specific to arm64. My limited experience tells me the opposite, that modern x64 servers have IOMMU enabled by default: E.g.: https://www.dell.com/support/manuals/en-uk/poweredge-r7515/r7515_bios_pub/processor-settings?guid=guid-ec36d324-4f45-4bc1-bb51-de2db7cc5cd9&lang=en-us https://support.hpe.com/hpesc/public/docDisplay?docId=a00025662en_us&docLocale=en_US This driver not working properly on a system with an IOMMU just tells us that the number of mainline users of this driver is very low :/ Kind regards, Niklas
