On Tue, Mar 22, 2022 at 01:03:14PM +0800, Lu Baolu wrote: > On 2022/3/21 20:43, Jason Gunthorpe wrote: > > 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?? > > > > When things go wrong, the corresponding response code will be responded > to the device through iommu_page_response(). The hardware should then > report the failure to the device driver and the device driver will > handle it in the device-specific way. There's no need to propagate the > I/O page faults to the device driver in any case. Do I understand it > right?
In theory yes, but devices don't necessarily have the ability to report precise errors, we may have more information. Thanks, Jean _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
