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From: Thomas Monjalon <thomas@monjalon.net>
To: Alexander Kozyrev <akozyrev@nvidia.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>,
	Raslan Darawsheh <rasland@nvidia.com>,
	Matan Azrad <matan@nvidia.com>,
	Slava Ovsiienko <viacheslavo@nvidia.com>
Subject: Re: [dpdk-dev] [PATCH v2] net/mlx5: do not allow copy to mark via modify field
Date: Thu, 22 Jul 2021 16:28:49 +0200	[thread overview]
Message-ID: <77476477.DtaZy5j6p8@thomas> (raw)
In-Reply-To: <DM6PR12MB375321D75D86512A2A2804E2DF119@DM6PR12MB3753.namprd12.prod.outlook.com>

16/07/2021 12:47, Slava Ovsiienko:
> > -----Original Message-----
> > From: Alexander Kozyrev <akozyrev@nvidia.com>
> > Sent: Friday, July 16, 2021 11:43
> > To: dev@dpdk.org
> > Cc: Raslan Darawsheh <rasland@nvidia.com>; Matan Azrad
> > <matan@nvidia.com>; Slava Ovsiienko <viacheslavo@nvidia.com>
> > Subject: [PATCH v2] net/mlx5: do not allow copy to mark via modify field
> > 
> > The Mark action is a two-stage process in the Mellanox driver.
> > First, a hardware register is filled with the required value, then this value is
> > registered in the software resource table.
> > 
> > The MODIFY_FIELD action can instruct a Mellanox NIC to copy some value
> > from an arbitrary packet header field into the hardware register, associated
> > with the Mark item. But there is no way NIC can modify the software
> > resource table as well.
> > 
> > Due to these driver limitations the copying of arbitrary value to the MARK can
> > not be supported and should be rejected in the MODIFY_FIELD action.
> > 
> Thank you, Alexander
> 
> > Signed-off-by: Alexander Kozyrev <akozyrev@nvidia.com>
> Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>

Applied, thanks.




      reply	other threads:[~2021-07-22 14:28 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-16 18:34 [dpdk-dev] [PATCH] " Alexander Kozyrev
2021-07-14  6:30 ` Slava Ovsiienko
2021-07-16  8:43 ` [dpdk-dev] [PATCH v2] " Alexander Kozyrev
2021-07-16 10:47   ` Slava Ovsiienko
2021-07-22 14:28     ` Thomas Monjalon [this message]

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