https://bugzilla.kernel.org/show_bug.cgi?id=198883 --- Comment #68 from Andrey Grodzovsky (andrey.grodzovsky@xxxxxxx) --- (In reply to Ricardo Ribalda from comment #67) > I have coreboot. So I do not have the typical menu. > > I have an FPGA writing to the main memory, and that could not happen if > iommu is enabled without extra configuration. > > If you can tell me which register to look for we can be 100% sure. I took a bettong board here in office, booted it while pressing ESC, goes into BIOS, then choosing Chipest->GFX Configuration->IOMMU En/Dis But i guess you mean you have coreboot INSTEAD of standard BIOS like i have, So at least you sure you have the following disabled as in this link - https://wiki.gentoo.org/wiki/IOMMU_SWIOTLB IOMMU Hardware Support disabled in make menuconfig and also you boot the kernel with iommu=off ? If so I assume you indeed have IOMMU disabled and then I will try later to again reproduce your issue with Bettong board I just found because before I was reproducing with a different CZ board. Andrey -- You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
