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From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: Adrian Moreno <amorenoz@redhat.com>, dev@dpdk.org
Cc: tiwei.bie@intel.com, zhihong.wang@intel.com, stable@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v6 3/3] vhost: prevent zero copy mode if iommu is on
Date: Fri, 11 Oct 2019 17:16:50 +0200
Message-ID: <78ab1ed8-9a0a-ba45-2f10-8a8be5ea8d04@redhat.com> (raw)
In-Reply-To: <20191009115432.14863-4-amorenoz@redhat.com>



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@redhat.com
> Cc: stable@dpdk.org
> 
> Reviewed-by: Tiwei Bie <tiwei.bie@intel.com>
> Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
> 
> ---
>  lib/librte_vhost/socket.c | 8 ++++++++
>  1 file changed, 8 insertions(+)

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


  reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-09 11:54 [dpdk-dev] [PATCH v6 0/3] vhost: add support for IOVA_VA mode Adrian Moreno
2019-10-09 11:54 ` [dpdk-dev] [PATCH v6 1/3] vhost: translate incoming log address to gpa Adrian Moreno
2019-10-11 15:13   ` Maxime Coquelin
2019-10-09 11:54 ` [dpdk-dev] [PATCH v6 2/3] vhost: convert buffer addresses to GPA for logging Adrian Moreno
2019-10-11 15:16   ` Maxime Coquelin
2019-10-09 11:54 ` [dpdk-dev] [PATCH v6 3/3] vhost: prevent zero copy mode if iommu is on Adrian Moreno
2019-10-11 15:16   ` Maxime Coquelin [this message]
2019-10-16 11:11 ` [dpdk-dev] [PATCH v6 0/3] vhost: add support for IOVA_VA mode Maxime Coquelin

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