[dpdk-dev] [PATCH v6 3/3] vhost: prevent zero copy mode if iommu is on

Maxime Coquelin maxime.coquelin at redhat.com
Fri Oct 11 17:16:50 CEST 2019



On 10/9/19 1:54 PM, Adrian Moreno wrote:
> The simultaneous use of dequeue_zero_copy and IOMMU is problematic.
> Not only because IOVA_VA mode is not supported but also because the
> potential invalidation of guest pages while the buffers are in use,
> is not handled.
> 
> Prevent these two features to be enabled simultaneously.
> 
> Fixes: 69c90e98f483 ("vhost: enable IOMMU support")
> Cc: maxime.coquelin at redhat.com
> Cc: stable at dpdk.org
> 
> Reviewed-by: Tiwei Bie <tiwei.bie at intel.com>
> Signed-off-by: Adrian Moreno <amorenoz at redhat.com>
> 
> ---
>  lib/librte_vhost/socket.c | 8 ++++++++
>  1 file changed, 8 insertions(+)

Reviewed-by: Maxime Coquelin <maxime.coquelin at redhat.com>



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