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charset="utf-8" If the device supports P2PDMA, add the FOLL_PCI_P2PDMA flag This allows ibv_reg_mr() and friends to use P2PDMA memory that has been mmaped into userspace for MRs in IB and RDMA transactions. Co-developed-by: Logan Gunthorpe Signed-off-by: Logan Gunthorpe Signed-off-by: Martin Oliveira Acked-by: Jason Gunthorpe --- drivers/infiniband/core/umem.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c index 07c571c7b699..b59bb6e1475e 100644 --- a/drivers/infiniband/core/umem.c +++ b/drivers/infiniband/core/umem.c @@ -208,6 +208,9 @@ struct ib_umem *ib_umem_get(struct ib_device *device, u= nsigned long addr, if (umem->writable) gup_flags |=3D FOLL_WRITE; =20 + if (ib_dma_pci_p2p_dma_supported(device)) + gup_flags |=3D FOLL_PCI_P2PDMA; + while (npages) { cond_resched(); pinned =3D pin_user_pages_fast(cur_base, --=20 2.34.1