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Date: Wed, 29 Sep 2021 23:15:53 +0200
From: Olivier Matz <olivier.matz@6wind.com>
To: Maxime Coquelin <maxime.coquelin@redhat.com>
Cc: david.marchand@redhat.com, chenbo.xia@intel.com, dev@dpdk.org,
stable@dpdk.org
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References: <20210929201739.176306-1-maxime.coquelin@redhat.com>
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In-Reply-To: <20210929201739.176306-1-maxime.coquelin@redhat.com>
Subject: Re: [dpdk-stable] [PATCH] net/virtio: revert forcing IOVA as VA
mode for virtio-user
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Hi Maxime,
On Wed, Sep 29, 2021 at 10:17:39PM +0200, Maxime Coquelin wrote:
> This patch removes the simplification in Virtio descriptors
> handling, where their buffer addresses are IOVAs for Virtio
> PCI devices, and VA-only for Virtio-user devices, which
> added a requirement on Virtio-user that it only supported
> IOVA as VA.
>
> This change introduced a regression for applications using
> Virtio-user and other physical PMDs that require IOVA as PA
> because they don't use an IOMMU.
>
> This patch reverts to the old behaviour, but needed to be
> reworked because of the refactoring that happened in v21.02.
>
> Fixes: 17043a2909bb ("net/virtio: force IOVA as VA mode for virtio-user")
> Cc: stable@dpdk.org
>
> Reported-by: Olivier Matz <olivier.matz@6wind.com>
> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Tested-by: Olivier Matz <olivier.matz@6wind.com>
Many thanks for your quick solution on this!