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* [PATCH] doc: remove custom kernel patch link in ENA's guide
@ 2021-11-23  7:23 Michal Krawczyk
  2021-11-24 10:47 ` Ferruh Yigit
  0 siblings, 1 reply; 2+ messages in thread
From: Michal Krawczyk @ 2021-11-23  7:23 UTC (permalink / raw)
  To: dev; +Cc: david.marchand, shaibran, upstream, Michal Krawczyk

ENAv2 device requires write combining support which isn't supported by
the upstream vfio-pci. amzn-driver repository provided non-upstream
patch to enable this feature and it was linked directly by the ENA PMD
guide.

To avoid custom kernel patch linking, the user is now guided to the AWS
ENA PMD documentation, which describes vfio-pci and ENAv2 issue more
deeply with possible workarounds on how to resolve it.

Signed-off-by: Michal Krawczyk <mk@semihalf.com>
---
 doc/guides/nics/ena.rst | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/doc/guides/nics/ena.rst b/doc/guides/nics/ena.rst
index 92b1858e7a..04fb5d4d75 100644
--- a/doc/guides/nics/ena.rst
+++ b/doc/guides/nics/ena.rst
@@ -158,9 +158,8 @@ Prerequisites
    In DPDK ``igb_uio`` it must be enabled by loading module with
    ``wc_activate=1`` flag (example below). However, mainline's vfio-pci
    driver in kernel doesn't have WC support yet (planed to be added).
-   If vfio-pci used user should be either turn off ENAv2 (to avoid performance
-   impact) or recompile vfio-pci driver with patch provided in
-   `amzn-github <https://github.com/amzn/amzn-drivers/tree/master/userspace/dpdk/enav2-vfio-patch>`_.
+   If vfio-pci is used user should follow
+   `AWS ENA PMD documentation <https://github.com/amzn/amzn-drivers/tree/master/userspace/dpdk/README.md>`_.
 
 #. Insert ``vfio-pci`` or ``igb_uio`` kernel module using the command
    ``modprobe vfio-pci`` or ``modprobe uio; insmod igb_uio.ko wc_activate=1``
-- 
2.25.1


^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: [PATCH] doc: remove custom kernel patch link in ENA's guide
  2021-11-23  7:23 [PATCH] doc: remove custom kernel patch link in ENA's guide Michal Krawczyk
@ 2021-11-24 10:47 ` Ferruh Yigit
  0 siblings, 0 replies; 2+ messages in thread
From: Ferruh Yigit @ 2021-11-24 10:47 UTC (permalink / raw)
  To: Michal Krawczyk, dev; +Cc: david.marchand, shaibran, upstream

On 11/23/2021 7:23 AM, Michal Krawczyk wrote:
> ENAv2 device requires write combining support which isn't supported by
> the upstream vfio-pci. amzn-driver repository provided non-upstream
> patch to enable this feature and it was linked directly by the ENA PMD
> guide.
> 
> To avoid custom kernel patch linking, the user is now guided to the AWS
> ENA PMD documentation, which describes vfio-pci and ENAv2 issue more
> deeply with possible workarounds on how to resolve it.
> 
> Signed-off-by: Michal Krawczyk <mk@semihalf.com>

Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>

Applied to dpdk-next-net/main, thanks.

^ permalink raw reply	[flat|nested] 2+ messages in thread

end of thread, other threads:[~2021-11-24 10:47 UTC | newest]

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2021-11-24 10:47 ` Ferruh Yigit

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