On 2019-07-23 10:30 a.m., Koenig, Christian wrote: > Am 23.07.19 um 01:08 schrieb Logan Gunthorpe: >> As discussed on the list previously, in order to fully support the >> whitelist Christian added with the IOMMU, we must ensure that we >> map any buffer going through the IOMMU with an aprropriate dma_map >> call. This patchset accomplishes this by cleaning up the output of >> upstream_bridge_distance() to better indicate the mapping requirements, >> caching these requirements in an xarray, then looking them up at map >> time and applying the appropriate mapping method. >> >> After this patchset, it's possible to use the NVMe-of P2P support to >> transfer between devices without a switch on the whitelisted root >> complexes. A couple Intel device I have tested this on have also >> been added to the white list. >> >> Most of the changes are contained within the p2pdma.c, but there are >> a few minor touches to other subsystems, mostly to add support >> to call an unmap function. >> >> The final patch in this series demonstrates a possible >> pci_p2pdma_map_resource() function that I expect Christian will need >> but does not have any users at this time so I don't intend for it to be >> considered for merging. >> >> This patchset is based on 5.3-rc1 and a git branch is available here: >> >> https://github.com/sbates130272/linux-p2pmem/ p2pdma_rc_map_v1 > > I reviewed patches #1-#3 and #14. > > Feel free to stick an Acked-by: Christian König > <christian.koenig@xxxxxxx> to the rest, but I'm not really deep into the > NVMe P2P handling here. Thanks! Logan
