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From: Slava Ovsiienko <viacheslavo@nvidia.com>
To: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>, Matan Azrad
<matan@nvidia.com>, Shahaf Shuler <shahafs@nvidia.com>
CC: "dev@dpdk.org" <dev@dpdk.org>, "ruifeng.wang@arm.com"
<ruifeng.wang@arm.com>, "nd@arm.com" <nd@arm.com>, Matan Azrad
<matan@nvidia.com>, "stable@dpdk.org" <stable@dpdk.org>
Subject: RE: [PATCH v3] net/mlx5: use just sufficient barrier for ARM platforms
Thread-Topic: [PATCH v3] net/mlx5: use just sufficient barrier for ARM
platforms
Thread-Index: AQHZUi920r7j1Em+NEacdAoROfq0eq7yl5qQ
Date: Thu, 9 Mar 2023 15:44:40 +0000
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References: <20220830200038.1694160-1-honnappa.nagarahalli@arm.com>
<20230309023247.1241515-1-honnappa.nagarahalli@arm.com>
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Errors-To: dev-bounces@dpdk.org
> -----Original Message-----
> From: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
> Sent: =DE=C5=D4=D7=C5=D2=C7, 9 =CD=C1=D2=D4=C1 2023 =C7. 04:33
> To: Matan Azrad <matan@nvidia.com>; Shahaf Shuler <shahafs@nvidia.com>;
> Slava Ovsiienko <viacheslavo@nvidia.com>
> Cc: dev@dpdk.org; honnappa.nagarahalli@arm.com; ruifeng.wang@arm.com;
> nd@arm.com; Matan Azrad <matan@mellanox.com>; stable@dpdk.org
> Subject: [PATCH v3] net/mlx5: use just sufficient barrier for ARM platfor=
ms
>=20
> cqe->op_own indicates if the CQE is owned by the NIC. The rest of
> the fields in CQE should be read only after op_own is read. On Arm platfo=
rms
> using "dmb ishld" is sufficient to enforce this.
>=20
> Fixes: 88c0733535d6 ("net/mlx5: extend Rx completion with error handling"=
)
> Cc: matan@mellanox.com
> Cc: stable@dpdk.org
>=20
> Signed-off-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
> Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>