https://bugzilla.kernel.org/show_bug.cgi?id=76331 --- Comment #5 from Matt <mspeder@xxxxxxxxxxxxxxxxxxxxx> --- Hi Alex, Great news ! Yesterday I had the opportunity to recompile my kernel with your suggested fix in intel-iommu driver : dmar_domain->gaw = min(dmar_domain->gaw, addr_width); After multiple tests I can confirm that this successfully fixed the issue. How can we have this integrated in the official kernel sources ? I also tried to re-order the qemu command-line... With or without the fix I don't see any difference and I always end up with various problems related to the gpu pass-thru : - one VM blue screen at boot (VIDEO_TDR_ERROR) - one Host crash ! - driver error (code 43) and dmesg full of errors like : [ 2283.900194] dmar: DMAR:[DMA Read] Request device [06:00.0] fault addr 12de0a000 DMAR:[fault reason 12] non-zero reserved fields in PTE [ 2283.900201] dmar: DMAR:[DMA Write] Request device [06:00.0] fault addr aff93000 DMAR:[fault reason 12] non-zero reserved fields in PTE [ 2286.149141] dmar: DRHD: handling fault status reg 602 But I'm not sure if this problem is related... -- You are receiving this mail because: You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
