From: Randy Dunlap <rdunlap@infradead.org>
To: Logan Gunthorpe <logang@deltatee.com>,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
linux-nvme@lists.infradead.org, linux-rdma@vger.kernel.org,
linux-nvdimm@lists.01.org, linux-block@vger.kernel.org
Cc: "Stephen Bates" <sbates@raithlin.com>,
"Christoph Hellwig" <hch@lst.de>, "Jens Axboe" <axboe@kernel.dk>,
"Keith Busch" <keith.busch@intel.com>,
"Sagi Grimberg" <sagi@grimberg.me>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Jason Gunthorpe" <jgg@mellanox.com>,
"Max Gurtovoy" <maxg@mellanox.com>,
"Dan Williams" <dan.j.williams@intel.com>,
"Jérôme Glisse" <jglisse@redhat.com>,
"Benjamin Herrenschmidt" <benh@kernel.crashing.org>,
"Alex Williamson" <alex.williamson@redhat.com>,
"Christian König" <christian.koenig@amd.com>
Subject: Re: [PATCH v4 04/14] PCI/P2PDMA: Clear ACS P2P flags for all devices behind switches
Date: Mon, 23 Apr 2018 20:33:47 -0700 [thread overview]
Message-ID: <76c1bd8e-6eb4-3238-5cee-7fdeaeccc574@infradead.org> (raw)
In-Reply-To: <20180423233046.21476-5-logang@deltatee.com>
On 04/23/2018 04:30 PM, Logan Gunthorpe wrote:> > Signed-off-by: Logan Gunthorpe <logang@deltatee.com>> ---
> drivers/pci/Kconfig | 9 +++++++++> drivers/pci/p2pdma.c | 45 ++++++++++++++++++++++++++++++---------------> drivers/pci/pci.c | 6 ++++++> include/linux/pci-p2pdma.h | 5 +++++> 4 files changed, 50 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
> index b2396c22b53e..b6db41d4b708 100644
> --- a/drivers/pci/Kconfig
> +++ b/drivers/pci/Kconfig
> @@ -139,6 +139,15 @@ config PCI_P2PDMA
> transations must be between devices behind the same root port.
> (Typically behind a network of PCIe switches).
>
> + Enabling this option will also disable ACS on all ports behind
> + any PCIe switch. This effectively puts all devices behind any
> + switch heirarchy into the same IOMMU group. Which implies that
hierarchy group, which
and sames fixes in the commit description...
> + individual devices behind any switch will not be able to be
> + assigned to separate VMs because there is no isolation between
> + them. Additionally, any malicious PCIe devices will be able to
> + DMA to memory exposed by other EPs in the same domain as TLPs
> + will not be checked by the IOMMU.
> +
> If unsure, say N.
>
> config PCI_LABEL
--
~Randy
next prev parent reply other threads:[~2018-04-24 3:34 UTC|newest]
Thread overview: 103+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-23 23:30 [PATCH v4 00/14] Copy Offload in NVMe Fabrics with P2P PCI Memory Logan Gunthorpe
2018-04-23 23:30 ` [PATCH v4 01/14] PCI/P2PDMA: Support peer-to-peer memory Logan Gunthorpe
2018-05-07 23:00 ` Bjorn Helgaas
2018-05-07 23:09 ` Logan Gunthorpe
2018-04-23 23:30 ` [PATCH v4 02/14] PCI/P2PDMA: Add sysfs group to display p2pmem stats Logan Gunthorpe
2018-04-23 23:30 ` [PATCH v4 03/14] PCI/P2PDMA: Add PCI p2pmem dma mappings to adjust the bus offset Logan Gunthorpe
2018-05-07 23:02 ` Bjorn Helgaas
2018-04-23 23:30 ` [PATCH v4 04/14] PCI/P2PDMA: Clear ACS P2P flags for all devices behind switches Logan Gunthorpe
2018-04-24 3:33 ` Randy Dunlap [this message]
2018-05-07 23:13 ` Bjorn Helgaas
2018-05-08 7:17 ` Christian König
2018-05-08 14:25 ` Stephen Bates
2018-05-08 16:37 ` Christian König
2018-05-08 16:27 ` Logan Gunthorpe
2018-05-08 16:50 ` Christian König
2018-05-08 19:13 ` Logan Gunthorpe
2018-05-08 19:34 ` Alex Williamson
2018-05-08 19:45 ` Logan Gunthorpe
2018-05-08 20:13 ` Alex Williamson
2018-05-08 20:19 ` Logan Gunthorpe
2018-05-08 20:43 ` Alex Williamson
2018-05-08 20:49 ` Logan Gunthorpe
2018-05-08 21:26 ` Alex Williamson
2018-05-08 21:42 ` Stephen Bates
2018-05-08 22:03 ` Alex Williamson
2018-05-08 22:10 ` Logan Gunthorpe
2018-05-08 22:25 ` Stephen Bates
2018-05-08 23:11 ` Alex Williamson
2018-05-08 23:31 ` Logan Gunthorpe
2018-05-09 0:17 ` Alex Williamson
2018-05-08 22:32 ` Alex Williamson
2018-05-08 23:00 ` Dan Williams
2018-05-08 23:15 ` Logan Gunthorpe
2018-05-09 12:38 ` Stephen Bates
2018-05-08 22:21 ` Don Dutile
2018-05-09 12:44 ` Stephen Bates
2018-05-09 15:58 ` Don Dutile
2018-05-08 20:50 ` Jerome Glisse
2018-05-08 21:35 ` Stephen Bates
2018-05-09 13:12 ` Stephen Bates
2018-05-09 13:40 ` Christian König
2018-05-09 15:41 ` Stephen Bates
2018-05-09 16:07 ` Jerome Glisse
2018-05-09 16:30 ` Stephen Bates
2018-05-09 17:49 ` Jerome Glisse
2018-05-10 14:20 ` Stephen Bates
2018-05-10 14:29 ` Christian König
2018-05-10 14:59 ` Jerome Glisse
2018-05-10 18:44 ` Stephen Bates
2018-05-09 16:45 ` Logan Gunthorpe
2018-05-10 12:52 ` Christian König
2018-05-10 14:16 ` Stephen Bates
2018-05-10 14:41 ` Jerome Glisse
2018-05-10 18:41 ` Stephen Bates
2018-05-10 18:59 ` Logan Gunthorpe
2018-05-10 19:10 ` Alex Williamson
2018-05-10 19:24 ` Jerome Glisse
2018-05-10 16:32 ` Logan Gunthorpe
2018-05-10 17:11 ` Stephen Bates
2018-05-10 17:15 ` Logan Gunthorpe
2018-05-11 8:52 ` Christian König
2018-05-11 15:48 ` Logan Gunthorpe
2018-05-11 21:50 ` Stephen Bates
2018-05-11 22:24 ` Stephen Bates
2018-05-11 22:55 ` Logan Gunthorpe
2018-05-08 14:31 ` Dan Williams
2018-05-08 14:44 ` Stephen Bates
2018-05-08 21:04 ` Don Dutile
2018-05-08 21:27 ` Stephen Bates
2018-05-08 23:06 ` Don Dutile
2018-05-09 0:01 ` Alex Williamson
2018-05-09 12:35 ` Stephen Bates
2018-05-09 14:44 ` Alex Williamson
2018-05-09 15:52 ` Don Dutile
2018-05-09 15:47 ` Don Dutile
2018-05-09 15:53 ` Don Dutile
2018-04-23 23:30 ` [PATCH v4 05/14] docs-rst: Add a new directory for PCI documentation Logan Gunthorpe
2018-04-23 23:30 ` [PATCH v4 06/14] PCI/P2PDMA: Add P2P DMA driver writer's documentation Logan Gunthorpe
2018-05-07 23:20 ` Bjorn Helgaas
2018-05-22 21:24 ` Randy Dunlap
2018-05-22 21:28 ` Logan Gunthorpe
2018-04-23 23:30 ` [PATCH v4 07/14] block: Introduce PCI P2P flags for request and request queue Logan Gunthorpe
2018-04-23 23:30 ` [PATCH v4 08/14] IB/core: Ensure we map P2P memory correctly in rdma_rw_ctx_[init|destroy]() Logan Gunthorpe
2018-04-23 23:30 ` [PATCH v4 09/14] nvme-pci: Use PCI p2pmem subsystem to manage the CMB Logan Gunthorpe
2018-04-23 23:30 ` [PATCH v4 10/14] nvme-pci: Add support for P2P memory in requests Logan Gunthorpe
2018-04-23 23:30 ` [PATCH v4 11/14] nvme-pci: Add a quirk for a pseudo CMB Logan Gunthorpe
2018-04-23 23:30 ` [PATCH v4 12/14] nvmet: Introduce helper functions to allocate and free request SGLs Logan Gunthorpe
2018-04-23 23:30 ` [PATCH v4 13/14] nvmet-rdma: Use new SGL alloc/free helper for requests Logan Gunthorpe
2018-04-23 23:30 ` [PATCH v4 14/14] nvmet: Optionally use PCI P2P memory Logan Gunthorpe
2018-05-02 11:51 ` [PATCH v4 00/14] Copy Offload in NVMe Fabrics with P2P PCI Memory Christian König
2018-05-02 15:56 ` Logan Gunthorpe
2018-05-03 9:05 ` Christian König
2018-05-03 15:59 ` Logan Gunthorpe
2018-05-03 17:29 ` Christian König
2018-05-03 18:43 ` Logan Gunthorpe
2018-05-04 14:27 ` Christian König
2018-05-04 15:52 ` Logan Gunthorpe
2018-05-07 23:23 ` Bjorn Helgaas
2018-05-07 23:34 ` Logan Gunthorpe
2018-05-08 16:57 ` Alex Williamson
2018-05-08 19:14 ` Logan Gunthorpe
2018-05-08 21:25 ` Don Dutile
2018-05-08 21:40 ` Alex Williamson
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