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dkim=pass header.d=deltatee.com header.s=20200525 header.b=svROYF9V; spf=pass (imf02.hostedemail.com: domain of gunthorp@deltatee.com designates 204.191.154.188 as permitted sender) smtp.mailfrom=gunthorp@deltatee.com; dmarc=pass (policy=none) header.from=deltatee.com X-HE-Tag: 1661441086-867838 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: When a bio's queue supports PCI P2PDMA, set FOLL_PCI_P2PDMA for iov_iter_get_pages_flags(). This allows PCI P2PDMA pages to be passed from userspace and enables the NVMe passthru requests to use P2PDMA pages. Signed-off-by: Logan Gunthorpe Reviewed-by: Christoph Hellwig Reviewed-by: John Hubbard --- block/blk-map.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/block/blk-map.c b/block/blk-map.c index 7196a6b64c80..1378f49ca5ca 100644 --- a/block/blk-map.c +++ b/block/blk-map.c @@ -236,6 +236,7 @@ static int bio_map_user_iov(struct request *rq, struct iov_iter *iter, { unsigned int max_sectors = queue_max_hw_sectors(rq->q); unsigned int nr_vecs = iov_iter_npages(iter, BIO_MAX_VECS); + unsigned int flags = 0; struct bio *bio; int ret; int j; @@ -248,13 +249,17 @@ static int bio_map_user_iov(struct request *rq, struct iov_iter *iter, return -ENOMEM; bio_init(bio, NULL, bio->bi_inline_vecs, nr_vecs, req_op(rq)); + if (blk_queue_pci_p2pdma(rq->q)) + flags |= FOLL_PCI_P2PDMA; + while (iov_iter_count(iter)) { struct page **pages; ssize_t bytes; size_t offs, added = 0; int npages; - bytes = iov_iter_get_pages_alloc2(iter, &pages, LONG_MAX, &offs); + bytes = iov_iter_get_pages_alloc_flags(iter, &pages, LONG_MAX, + &offs, flags); if (unlikely(bytes <= 0)) { ret = bytes ? bytes : -EFAULT; goto out_unmap;