On Mon, Mar 21, 2022 at 11:42:16AM +0000, Jean-Philippe Brucker wrote: > I tend to disagree with that last part. The fault is caused by a specific > device accessing shared page tables. We should keep that device > information throughout the fault handling, so that we can report it to the > driver when things go wrong.
SVA faults should never be reported to drivers?? > A process can have multiple threads bound to different devices, they > share the same mm so if the driver wanted to signal a misbehaving > thread, similarly to a SEGV on the CPU side, it would need the > device information to precisely report it to userspace. I'm not sure I understand this - we can't match DMAs to executing CPUs. On fault we fail the DMA and let the process keep running or SIGSEGV the whole thread group. Jason _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
