From: Jason Gunthorpe <jgg@nvidia.com>
To: Keith Busch <kbusch@kernel.org>
Cc: Leon Romanovsky <leon@kernel.org>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Abdiel Janulgue <abdiel.janulgue@gmail.com>,
Alexander Potapenko <glider@google.com>,
Alex Gaynor <alex.gaynor@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
Christoph Hellwig <hch@lst.de>,
Danilo Krummrich <dakr@kernel.org>,
iommu@lists.linux.dev, Jason Wang <jasowang@redhat.com>,
Jens Axboe <axboe@kernel.dk>, Joerg Roedel <joro@8bytes.org>,
Jonathan Corbet <corbet@lwn.net>, Juergen Gross <jgross@suse.com>,
kasan-dev@googlegroups.com, linux-block@vger.kernel.org,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, linux-nvme@lists.infradead.org,
linuxppc-dev@lists.ozlabs.org,
linux-trace-kernel@vger.kernel.org,
Madhavan Srinivasan <maddy@linux.ibm.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
Michael Ellerman <mpe@ellerman.id.au>,
"Michael S. Tsirkin" <mst@redhat.com>,
Miguel Ojeda <ojeda@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
rust-for-linux@vger.kernel.org, Sagi Grimberg <sagi@grimberg.me>,
Stefano Stabellini <sstabellini@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
virtualization@lists.linux.dev, Will Deacon <will@kernel.org>,
xen-devel@lists.xenproject.org
Subject: Re: [PATCH v4 15/16] block-dma: properly take MMIO path
Date: Thu, 28 Aug 2025 20:45:42 -0300 [thread overview]
Message-ID: <20250828234542.GK7333@nvidia.com> (raw)
In-Reply-To: <aLDCC4rXcIKF8sRg@kbusch-mbp>
On Thu, Aug 28, 2025 at 02:54:35PM -0600, Keith Busch wrote:
> In truth though, I hadn't tried p2p metadata before today, and it looks
> like bio_integrity_map_user() is missing the P2P extraction flags to
> make that work. Just added this patch below, now I can set p2p or host
> memory independently for data and integrity payloads:
I think it is a bit more than that, you have to make sure all the meta
data is the same, either all p2p or all cpu and then record this
somehow so the DMA mapping knows what kind it is.
Once that is all done then the above should still be OK, the dma unmap
of the data can follow Leon's new flag and the dma unmap of the
integrity can follow however integrity kept track (in the
bio_integrity_payload perhaps?) ??
Jason
next prev parent reply other threads:[~2025-08-28 23:45 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-19 17:36 [PATCH v4 00/16] dma-mapping: migrate to physical address-based API Leon Romanovsky
2025-08-19 17:36 ` [PATCH v4 01/16] dma-mapping: introduce new DMA attribute to indicate MMIO memory Leon Romanovsky
2025-08-28 13:03 ` Jason Gunthorpe
2025-08-19 17:36 ` [PATCH v4 02/16] iommu/dma: implement DMA_ATTR_MMIO for dma_iova_link() Leon Romanovsky
2025-08-19 17:36 ` [PATCH v4 03/16] dma-debug: refactor to use physical addresses for page mapping Leon Romanovsky
2025-08-28 13:19 ` Jason Gunthorpe
2025-08-19 17:36 ` [PATCH v4 04/16] dma-mapping: rename trace_dma_*map_page to trace_dma_*map_phys Leon Romanovsky
2025-08-28 13:27 ` Jason Gunthorpe
2025-08-19 17:36 ` [PATCH v4 05/16] iommu/dma: rename iommu_dma_*map_page to iommu_dma_*map_phys Leon Romanovsky
2025-08-28 13:38 ` Jason Gunthorpe
2025-08-19 17:36 ` [PATCH v4 06/16] iommu/dma: extend iommu_dma_*map_phys API to handle MMIO memory Leon Romanovsky
2025-08-28 13:49 ` Jason Gunthorpe
2025-08-19 17:36 ` [PATCH v4 07/16] dma-mapping: convert dma_direct_*map_page to be phys_addr_t based Leon Romanovsky
2025-08-28 14:19 ` Jason Gunthorpe
2025-08-19 17:36 ` [PATCH v4 08/16] kmsan: convert kmsan_handle_dma to use physical addresses Leon Romanovsky
2025-08-28 15:00 ` Jason Gunthorpe
2025-08-19 17:36 ` [PATCH v4 09/16] dma-mapping: handle MMIO flow in dma_map|unmap_page Leon Romanovsky
2025-08-28 15:17 ` Jason Gunthorpe
2025-08-31 13:12 ` Leon Romanovsky
2025-08-19 17:36 ` [PATCH v4 10/16] xen: swiotlb: Open code map_resource callback Leon Romanovsky
2025-08-28 15:18 ` Jason Gunthorpe
2025-08-19 17:36 ` [PATCH v4 11/16] dma-mapping: export new dma_*map_phys() interface Leon Romanovsky
2025-08-19 18:22 ` Keith Busch
2025-08-28 16:01 ` Jason Gunthorpe
2025-08-19 17:36 ` [PATCH v4 12/16] mm/hmm: migrate to physical address-based DMA mapping API Leon Romanovsky
2025-08-19 17:36 ` [PATCH v4 13/16] mm/hmm: properly take MMIO path Leon Romanovsky
2025-08-19 17:36 ` [PATCH v4 14/16] block-dma: migrate to dma_map_phys instead of map_page Leon Romanovsky
2025-08-19 18:20 ` Keith Busch
2025-08-19 18:49 ` Leon Romanovsky
2025-09-02 20:49 ` Marek Szyprowski
2025-09-02 21:59 ` Keith Busch
2025-09-02 23:24 ` Jason Gunthorpe
2025-08-19 17:36 ` [PATCH v4 15/16] block-dma: properly take MMIO path Leon Romanovsky
2025-08-19 18:24 ` Keith Busch
2025-08-28 15:19 ` Keith Busch
2025-08-28 16:54 ` Leon Romanovsky
2025-08-28 17:15 ` Keith Busch
2025-08-28 18:41 ` Jason Gunthorpe
2025-08-28 19:10 ` Keith Busch
2025-08-28 19:18 ` Jason Gunthorpe
2025-08-28 20:54 ` Keith Busch
2025-08-28 23:45 ` Jason Gunthorpe [this message]
2025-08-29 12:35 ` Keith Busch
2025-08-19 17:37 ` [PATCH v4 16/16] nvme-pci: unmap MMIO pages with appropriate interface Leon Romanovsky
2025-08-19 19:58 ` Keith Busch
2025-08-28 11:57 ` [PATCH v4 00/16] dma-mapping: migrate to physical address-based API Leon Romanovsky
2025-09-01 21:47 ` Marek Szyprowski
2025-09-01 22:23 ` Jason Gunthorpe
2025-09-02 9:29 ` Leon Romanovsky
2025-08-29 13:16 ` Jason Gunthorpe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20250828234542.GK7333@nvidia.com \
--to=jgg@nvidia.com \
--cc=abdiel.janulgue@gmail.com \
--cc=akpm@linux-foundation.org \
--cc=alex.gaynor@gmail.com \
--cc=axboe@kernel.dk \
--cc=corbet@lwn.net \
--cc=dakr@kernel.org \
--cc=glider@google.com \
--cc=hch@lst.de \
--cc=iommu@lists.linux.dev \
--cc=jasowang@redhat.com \
--cc=jgross@suse.com \
--cc=joro@8bytes.org \
--cc=kasan-dev@googlegroups.com \
--cc=kbusch@kernel.org \
--cc=leon@kernel.org \
--cc=linux-block@vger.kernel.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-nvme@lists.infradead.org \
--cc=linux-trace-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=m.szyprowski@samsung.com \
--cc=maddy@linux.ibm.com \
--cc=mhiramat@kernel.org \
--cc=mpe@ellerman.id.au \
--cc=mst@redhat.com \
--cc=ojeda@kernel.org \
--cc=robin.murphy@arm.com \
--cc=rostedt@goodmis.org \
--cc=rust-for-linux@vger.kernel.org \
--cc=sagi@grimberg.me \
--cc=sstabellini@kernel.org \
--cc=virtualization@lists.linux.dev \
--cc=will@kernel.org \
--cc=xen-devel@lists.xenproject.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).