From: Jason Gunthorpe <jgg@ziepe.ca>
To: Christoph Hellwig <hch@lst.de>
Cc: "Logan Gunthorpe" <logang@deltatee.com>,
"open list" <linux-kernel@vger.kernel.org>,
linux-pci@vger.kernel.org, linux-nvme@lists.infradead.org,
linux-rdma <linux-rdma@vger.kernel.org>,
linux-nvdimm@lists.01.org, linux-block@vger.kernel.org,
"Stephen Bates" <sbates@raithlin.com>,
"Jens Axboe" <axboe@kernel.dk>,
"Keith Busch" <keith.busch@intel.com>,
"Sagi Grimberg" <sagi@grimberg.me>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Max Gurtovoy" <maxg@mellanox.com>,
"Dan Williams" <dan.j.williams@intel.com>,
"Jérôme Glisse" <jglisse@redhat.com>,
"Benjamin Herrenschmidt" <benh@kernel.crashing.org>
Subject: Re: [PATCH 06/12] IB/core: Add optional PCI P2P flag to rdma_rw_ctx_[init|destroy]()
Date: Mon, 8 Jan 2018 12:49:50 -0700 [thread overview]
Message-ID: <20180108194950.GK11348@ziepe.ca> (raw)
In-Reply-To: <20180108185743.GA15936@lst.de>
On Mon, Jan 8, 2018 at 11:57 AM, Christoph Hellwig <hch@lst.de> wrote:
>> (c) setup/manage any security permissions on mappings
>> Which P2P may at some point be concerned with.
>
> Maybe once root complexes with iommus actually support P2P. But until
> then we have a lot more more important problems to solve.
Pretty sure P2P capable IOMMU hardware exists.
With SOC's we also have the scenario that an DMA originated from an
on-die device wishes to target an off-die PCI BAR (through the IOMMU),
that definitely exists today, and people care about it :)
Jason
WARNING: multiple messages have this Message-ID (diff)
From: jgg@ziepe.ca (Jason Gunthorpe)
Subject: [PATCH 06/12] IB/core: Add optional PCI P2P flag to rdma_rw_ctx_[init|destroy]()
Date: Mon, 8 Jan 2018 12:49:50 -0700 [thread overview]
Message-ID: <20180108194950.GK11348@ziepe.ca> (raw)
In-Reply-To: <20180108185743.GA15936@lst.de>
On Mon, Jan 8, 2018@11:57 AM, Christoph Hellwig <hch@lst.de> wrote:
>> (c) setup/manage any security permissions on mappings
>> Which P2P may at some point be concerned with.
>
> Maybe once root complexes with iommus actually support P2P. But until
> then we have a lot more more important problems to solve.
Pretty sure P2P capable IOMMU hardware exists.
With SOC's we also have the scenario that an DMA originated from an
on-die device wishes to target an off-die PCI BAR (through the IOMMU),
that definitely exists today, and people care about it :)
Jason
next prev parent reply other threads:[~2018-01-08 19:49 UTC|newest]
Thread overview: 198+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-04 19:01 [PATCH 00/11] Copy Offload in NVMe Fabrics with P2P PCI Memory Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` [PATCH 01/12] pci-p2p: Support peer to peer memory Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 21:40 ` Bjorn Helgaas
2018-01-04 21:40 ` Bjorn Helgaas
2018-01-04 21:40 ` Bjorn Helgaas
2018-01-04 23:06 ` Logan Gunthorpe
2018-01-04 23:06 ` Logan Gunthorpe
2018-01-04 23:06 ` Logan Gunthorpe
2018-01-04 23:06 ` Logan Gunthorpe
2018-01-04 21:59 ` Bjorn Helgaas
2018-01-04 21:59 ` Bjorn Helgaas
2018-01-04 21:59 ` Bjorn Helgaas
2018-01-04 21:59 ` Bjorn Helgaas
2018-01-05 0:20 ` Logan Gunthorpe
2018-01-05 0:20 ` Logan Gunthorpe
2018-01-05 0:20 ` Logan Gunthorpe
2018-01-05 0:20 ` Logan Gunthorpe
2018-01-04 19:01 ` [PATCH 02/12] pci-p2p: Add sysfs group to display p2pmem stats Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 21:50 ` Bjorn Helgaas
2018-01-04 21:50 ` Bjorn Helgaas
2018-01-04 21:50 ` Bjorn Helgaas
2018-01-04 22:25 ` Jason Gunthorpe
2018-01-04 22:25 ` Jason Gunthorpe
2018-01-04 22:25 ` Jason Gunthorpe
2018-01-04 22:25 ` Jason Gunthorpe
2018-01-04 23:13 ` Logan Gunthorpe
2018-01-04 23:13 ` Logan Gunthorpe
2018-01-04 23:13 ` Logan Gunthorpe
2018-01-04 19:01 ` [PATCH 03/12] pci-p2p: Add PCI p2pmem dma mappings to adjust the bus offset Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` [PATCH 04/12] pci-p2p: Clear ACS P2P flags for all client devices Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 21:57 ` Bjorn Helgaas
2018-01-04 21:57 ` Bjorn Helgaas
2018-01-04 21:57 ` Bjorn Helgaas
2018-01-04 21:57 ` Bjorn Helgaas
2018-01-04 22:35 ` Alex Williamson
2018-01-04 22:35 ` Alex Williamson
2018-01-04 22:35 ` Alex Williamson
2018-01-05 0:00 ` Logan Gunthorpe
2018-01-05 0:00 ` Logan Gunthorpe
2018-01-05 0:00 ` Logan Gunthorpe
2018-01-05 0:00 ` Logan Gunthorpe
2018-01-05 1:09 ` Logan Gunthorpe
2018-01-05 1:09 ` Logan Gunthorpe
2018-01-05 1:09 ` Logan Gunthorpe
2018-01-05 3:33 ` Alex Williamson
2018-01-05 3:33 ` Alex Williamson
2018-01-05 3:33 ` Alex Williamson
2018-01-05 6:47 ` Jerome Glisse
2018-01-05 6:47 ` Jerome Glisse
2018-01-05 6:47 ` Jerome Glisse
2018-01-05 6:47 ` Jerome Glisse
2018-01-05 15:41 ` Alex Williamson
2018-01-05 15:41 ` Alex Williamson
2018-01-05 15:41 ` Alex Williamson
2018-01-05 17:10 ` Logan Gunthorpe
2018-01-05 17:10 ` Logan Gunthorpe
2018-01-05 17:10 ` Logan Gunthorpe
2018-01-05 17:10 ` Logan Gunthorpe
2018-01-05 17:18 ` Alex Williamson
2018-01-05 17:18 ` Alex Williamson
2018-01-05 17:18 ` Alex Williamson
2018-01-05 17:18 ` Alex Williamson
2018-01-04 19:01 ` [PATCH 05/12] block: Introduce PCI P2P flags for request and request queue Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` [PATCH 06/12] IB/core: Add optional PCI P2P flag to rdma_rw_ctx_[init|destroy]() Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:22 ` Jason Gunthorpe
2018-01-04 19:22 ` Jason Gunthorpe
2018-01-04 19:52 ` Logan Gunthorpe
2018-01-04 19:52 ` Logan Gunthorpe
2018-01-04 19:52 ` Logan Gunthorpe
2018-01-04 19:52 ` Logan Gunthorpe
2018-01-04 22:13 ` Jason Gunthorpe
2018-01-04 22:13 ` Jason Gunthorpe
2018-01-04 23:44 ` Logan Gunthorpe
2018-01-04 23:44 ` Logan Gunthorpe
2018-01-04 23:44 ` Logan Gunthorpe
2018-01-05 4:50 ` Jason Gunthorpe
2018-01-05 4:50 ` Jason Gunthorpe
2018-01-08 14:59 ` Christoph Hellwig
2018-01-08 14:59 ` Christoph Hellwig
2018-01-08 14:59 ` Christoph Hellwig
2018-01-08 18:09 ` Jason Gunthorpe
2018-01-08 18:09 ` Jason Gunthorpe
2018-01-08 18:17 ` Logan Gunthorpe
2018-01-08 18:17 ` Logan Gunthorpe
2018-01-08 18:17 ` Logan Gunthorpe
2018-01-08 18:17 ` Logan Gunthorpe
2018-01-08 18:29 ` Jason Gunthorpe
2018-01-08 18:29 ` Jason Gunthorpe
2018-01-08 18:29 ` Jason Gunthorpe
2018-01-08 18:34 ` Christoph Hellwig
2018-01-08 18:34 ` Christoph Hellwig
2018-01-08 18:34 ` Christoph Hellwig
2018-01-08 18:34 ` Christoph Hellwig
2018-01-08 18:44 ` Logan Gunthorpe
2018-01-08 18:44 ` Logan Gunthorpe
2018-01-08 18:44 ` Logan Gunthorpe
2018-01-08 18:44 ` Logan Gunthorpe
2018-01-08 18:57 ` Christoph Hellwig
2018-01-08 18:57 ` Christoph Hellwig
2018-01-08 18:57 ` Christoph Hellwig
2018-01-08 18:57 ` Christoph Hellwig
2018-01-08 19:05 ` Logan Gunthorpe
2018-01-08 19:05 ` Logan Gunthorpe
2018-01-08 19:05 ` Logan Gunthorpe
2018-01-08 19:05 ` Logan Gunthorpe
2018-01-09 16:47 ` Christoph Hellwig
2018-01-09 16:47 ` Christoph Hellwig
2018-01-09 16:47 ` Christoph Hellwig
2018-01-09 16:47 ` Christoph Hellwig
2018-01-08 19:49 ` Jason Gunthorpe [this message]
2018-01-08 19:49 ` Jason Gunthorpe
2018-01-09 16:46 ` Christoph Hellwig
2018-01-09 16:46 ` Christoph Hellwig
2018-01-09 16:46 ` Christoph Hellwig
2018-01-09 17:10 ` Jason Gunthorpe
2018-01-09 17:10 ` Jason Gunthorpe
2018-01-08 19:01 ` Jason Gunthorpe
2018-01-08 19:01 ` Jason Gunthorpe
2018-01-08 19:01 ` Jason Gunthorpe
2018-01-09 16:55 ` Christoph Hellwig
2018-01-09 16:55 ` Christoph Hellwig
2018-01-09 16:55 ` Christoph Hellwig
2018-01-09 16:55 ` Christoph Hellwig
2018-01-04 19:01 ` [PATCH 07/12] nvme-pci: clean up CMB initialization Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:08 ` Logan Gunthorpe
2018-01-04 19:08 ` Logan Gunthorpe
2018-01-04 19:08 ` Logan Gunthorpe
2018-01-04 19:08 ` Logan Gunthorpe
2018-01-04 19:01 ` [PATCH 08/12] nvme-pci: clean up SMBSZ bit definitions Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:08 ` Logan Gunthorpe
2018-01-04 19:08 ` Logan Gunthorpe
2018-01-04 19:08 ` Logan Gunthorpe
2018-01-04 19:08 ` Logan Gunthorpe
2018-01-04 19:01 ` [PATCH 09/12] nvme-pci: Use PCI p2pmem subsystem to manage the CMB Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-05 15:30 ` Marta Rybczynska
2018-01-05 15:30 ` Marta Rybczynska
2018-01-05 15:30 ` Marta Rybczynska
2018-01-05 15:30 ` Marta Rybczynska
2018-01-05 18:14 ` Logan Gunthorpe
2018-01-05 18:14 ` Logan Gunthorpe
2018-01-05 18:14 ` Logan Gunthorpe
2018-01-05 18:14 ` Logan Gunthorpe
2018-01-05 18:11 ` Keith Busch
2018-01-05 18:11 ` Keith Busch
2018-01-05 18:11 ` Keith Busch
2018-01-05 18:11 ` Keith Busch
2018-01-05 18:19 ` Logan Gunthorpe
2018-01-05 18:19 ` Logan Gunthorpe
2018-01-05 18:19 ` Logan Gunthorpe
2018-01-05 19:01 ` Keith Busch
2018-01-05 19:01 ` Keith Busch
2018-01-05 19:01 ` Keith Busch
2018-01-05 19:01 ` Keith Busch
2018-01-05 19:04 ` Logan Gunthorpe
2018-01-05 19:04 ` Logan Gunthorpe
2018-01-05 19:04 ` Logan Gunthorpe
2018-01-04 19:01 ` [PATCH 10/12] nvme-pci: Add support for P2P memory in requests Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` [PATCH 11/12] nvme-pci: Add a quirk for a pseudo CMB Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` [PATCH 12/12] nvmet: Optionally use PCI P2P memory Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan Gunthorpe
2018-01-04 19:01 ` Logan 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=20180108194950.GK11348@ziepe.ca \
--to=jgg@ziepe.ca \
--cc=axboe@kernel.dk \
--cc=benh@kernel.crashing.org \
--cc=bhelgaas@google.com \
--cc=dan.j.williams@intel.com \
--cc=hch@lst.de \
--cc=jglisse@redhat.com \
--cc=keith.busch@intel.com \
--cc=linux-block@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-nvdimm@lists.01.org \
--cc=linux-nvme@lists.infradead.org \
--cc=linux-pci@vger.kernel.org \
--cc=linux-rdma@vger.kernel.org \
--cc=logang@deltatee.com \
--cc=maxg@mellanox.com \
--cc=sagi@grimberg.me \
--cc=sbates@raithlin.com \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.