From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-0016f401.pphosted.com (mx0a-0016f401.pphosted.com [67.231.148.174]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7787E2D6E64; Tue, 16 Sep 2025 11:19:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=67.231.148.174 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758021566; cv=none; b=TrIjralx9oO1jgWO9u0xJzS9JSTTSrkaN/J7Xl6UF1N/c2hPTwCDSq3B63CTW1B21O2SQNT/Obxznz8JYyYZPCQMSK7kmHNrsHdmDhh+/v/L0Kp7/Y214kl8iKomPUhtOPGoHyby1+HzzGAAbLp27BUWm2rw2s2pEHJL/fy2e7A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758021566; c=relaxed/simple; bh=ZkEUkqP6FZBlXHDVGb/IKSKdn6/DO0jUbBztVIUKexc=; h=Date:From:To:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=FmOpVHGbadaeFgYboQqKFo3VwC8At2+WeHblw8yZpNzlSbH43tz2RCzevx/4xC/70I9+QSngjydkUmH+EDH2P+bLv5BIG1PrvQ4nSCc+fXcsHbBJc9oISyIlpddpapn448q/06F/jYdUnB+Hu7VYlsWNy8a9CJ4lvq3A1Bp9680= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=marvell.com; spf=pass smtp.mailfrom=marvell.com; dkim=pass (2048-bit key) header.d=marvell.com header.i=@marvell.com header.b=iAhOZc7j; arc=none smtp.client-ip=67.231.148.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=marvell.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=marvell.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=marvell.com header.i=@marvell.com header.b="iAhOZc7j" Received: from pps.filterd (m0431384.ppops.net [127.0.0.1]) by mx0a-0016f401.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 58GBEO7k001188; Tue, 16 Sep 2025 04:19:03 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=marvell.com; h= content-type:date:from:message-id:mime-version:subject:to; s= pfpt0220; bh=Ab6LVYTy3wdjdNsodU2BuvBNogQMb57VcpoD69+tAxk=; b=iAh OZc7jmcfoAtKTuIe75kPTRsGY9bQ/+LUnpDyF2IJC8bkI57JMeuhlYUat3pA1iRK W+wCJjHrudUN6jAOikspco4s0yGhCVh0BlwF6lwcEUV2K9wExM9NlMSakBK1TNcm T93rBFVjg1fuTunzzFkZSfDEwZ4G1SS8ALl84uaBQTx5ocSZsStjpIqTqyuS325X ZYNJU/5VPQ+lF6PeS1gaK3X8TOqg5/VENXB14fH+u8jx/A/ifItZ0KkAxU+rGWnD 1QjNageV6cE70PUTY1U29kDztHFfgLOogiZciSWgydl+XZHSlmkKH4gwnF00uHZV l/wkLSLyCkZlm8LK55Q== Received: from dc5-exch05.marvell.com ([199.233.59.128]) by mx0a-0016f401.pphosted.com (PPS) with ESMTPS id 4976ukg060-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 16 Sep 2025 04:19:03 -0700 (PDT) Received: from DC5-EXCH05.marvell.com (10.69.176.209) by DC5-EXCH05.marvell.com (10.69.176.209) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.25; Tue, 16 Sep 2025 04:19:09 -0700 Received: from maili.marvell.com (10.69.176.80) by DC5-EXCH05.marvell.com (10.69.176.209) with Microsoft SMTP Server id 15.2.1544.25 via Frontend Transport; Tue, 16 Sep 2025 04:19:09 -0700 Received: from test-OptiPlex-Tower-Plus-7010 (unknown [10.29.37.157]) by maili.marvell.com (Postfix) with SMTP id D27375E6872; Tue, 16 Sep 2025 04:18:57 -0700 (PDT) Date: Tue, 16 Sep 2025 16:48:56 +0530 From: Hariprasad Kelam To: , , , , , , , , , , , Subject: Query regarding Phy loopback support Message-ID: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwOTE2MDEwNiBTYWx0ZWRfX5veuNGpLKakX n6LyHf6Y88IWZgqddag0rcKhZKvpfVv3lxY7T9IQAKX+CTwSMegQS9VOwR2QHmXiXvWQ5X3kKXB PzQ6fPnbqV7eAvBeq02rD9eNeU8Z0rlhS8WZVlCG3l6E2vCo0YgGNa+ZX35SmfqaP1Kih7ZZw4V QBEbPR1pZ4/u0f4NNSUs4gG3YIrKWJ3lYj6SlhkaKzKhig5iKlzaPXIBnxfIbGxFrWskea014UN 5tBfWDaYRcp1erPy/61eYDfYjQSXd7Pez27fQgbwKUxA+G+yj6sT83WrfAfbuWmjEUfOdN14CkL v9RZsUXoNxYpYIQ7NmcDnP7plwNDdii3zlUYvy4IwCmkzUnEkYPd4/Pr88rYS7VP9FSrD/zLfxc J82oVcTK X-Proofpoint-GUID: N1wQo6NOJfc867ctH2CRmUh7HuymDQ6R X-Proofpoint-ORIG-GUID: N1wQo6NOJfc867ctH2CRmUh7HuymDQ6R X-Authority-Analysis: v=2.4 cv=deWA3WXe c=1 sm=1 tr=0 ts=68c947a7 cx=c_pps a=rEv8fa4AjpPjGxpoe8rlIQ==:117 a=rEv8fa4AjpPjGxpoe8rlIQ==:17 a=kj9zAlcOel0A:10 a=yJojWOMRYYMA:10 a=Q0HHoM9fUppamqbhzqYA:9 a=CjuIK1q_8ugA:10 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1117,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-09-16_02,2025-09-12_01,2025-03-28_01 We're looking for a standard way to configure PHY loopback on a network interface using common Linux tools like ethtool, ip, or devlink. Currently, ethtool -k eth0 loopback on enables a generic loopback, but it doesn't specify if it's an internal, external, or PHY loopback. Need suggestions to implement this feature in a standard way.