[dpdk-dev] [PATCH] doc: Clarify IOMMU usage with "uio-pci" kernel module
Stephen Hemminger
stephen at networkplumber.org
Wed Sep 5 11:22:16 CEST 2018
On Wed, 5 Sep 2018 00:20:29 +0000
"Tone Zhang (Arm Technology China)" <Tone.Zhang at arm.com> wrote:
> Hi Rami,
>
> Yes, I mean “uio_pci_generic” kernel module.
>
> I will update the change accordingly.
>
> Thanks.
>
> Br,
> Tone
>
> From: Rami Rosen <roszenrami at gmail.com>
> Sent: Wednesday, September 5, 2018 3:55 AM
> To: Tone Zhang (Arm Technology China) <Tone.Zhang at arm.com>
> Cc: dev at dpdk.org; nd <nd at arm.com>
> Subject: Re: [dpdk-dev] [PATCH] doc: Clarify IOMMU usage with "uio-pci" kernel module
>
> Hi Tone,
> >if the devices for used DPDK bound to the ``uio-pci`` kernel module, please make
>
> The three kernel modules which can be used for DPDK binding are vfio-pci, uio_pci_generic and igb_uio. Don't you mean here uio_pci_generic ?
>
> Regards,
> Rami Rosen
>
>
> בתאריך יום ג׳, 4 בספט׳ 2018, 11:59, מאת tone.z
> When binding the devices used by DPDK to the "uio-pci" kernel module,
> the IOMMU should be disabled in order not to break the
> because of the virtual / physical address mapping.
>
> The patch clarifies the IOMMU configuration on both x86_64 and arm64
> systems.
>
> Signed-off-by: tone.zhang <tone.zhang at arm.com<mailto:tone.zhang at arm.com>>
> ---
> doc/guides/linux_gsg/linux_drivers.rst | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/doc/guides/linux_gsg/linux_drivers.rst b/doc/guides/linux_gsg/linux_drivers.rst
> index 371a817..8f9ec8f 100644
> --- a/doc/guides/linux_gsg/linux_drivers.rst
> +++ b/doc/guides/linux_gsg/linux_drivers.rst
> @@ -48,6 +48,13 @@ be loaded as shown below:
> ``vfio-pci``
> 2.7.4
Also, it would be good if documentation was clear in recommending using VFIO
instead if IOMMU is present.
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