From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout-03.galae.net (smtpout-03.galae.net [185.246.85.4]) (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 6FA7035C193; Fri, 31 Jul 2026 06:16:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.85.4 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785478570; cv=none; b=McAxzxGiGh49XyVk7IF+UbS6FgCj8rV2HbjAOQ+/mGNwrdTIwDCy4pFoEIf8Hn5KyEXDXSMRdYsF7EaBUVSz/SHIB1K4jStvJGfOCau1XiMpHSl46ndEBU/p0Sq3v5N3gx2bUvoIl59LJQEZxYL5WJaApXEqls3nY1EQJlutzXo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785478570; c=relaxed/simple; bh=l3Q42nzcGMKxgcV6gSD/b6ksPLagU0fRBNetl032Cxw=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=euwxLQB4Uu0vCMug3Nzk6e3WB+f2qYV+kdJG0CEXz3adbB9vIyXnC8ufl3qzEjPA23Y8I3YUW4J3kr3xRI9y9eq6OfFpM+W75wk6ZbZNSNdrgWkAPxz+OxnuBOAUmjFSjeucv6aI0Xp+n2hyHfC6+FrcuKrdig3eYQ3Hd8VaC48= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=Grf7iqz+; arc=none smtp.client-ip=185.246.85.4 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="Grf7iqz+" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-03.galae.net (Postfix) with ESMTPS id 6D8D94E41041; Fri, 31 Jul 2026 06:16:04 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 2E8886039A; Fri, 31 Jul 2026 06:16:04 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 4075611C1641B; Fri, 31 Jul 2026 08:15:53 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1785478559; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:content-language:in-reply-to:references; bh=+sLaQk5hMGac2ZjgsfEERJXkkAi0F/Kx63YTEf4+N0o=; b=Grf7iqz+h/x0ux6euMz1Of3HSeAbBOJgBbTjY7/Bq1h1hObeNZqBCuJ16CllzwnvmadZpD lGPd2zp1Je1QjF3jxjP8A7mpQ2NvZgMaC6nsCzfNIyPnPdCXKZnCEGS6+GxgATHJE8oeps g9dyMHYB3V2YBnmg/6As53byJ8NBomRd9S4QzPyFkiftYrbODgqJGvA6KwcXZGb6O8oy4x z0FKBdb43Jss+jS0V7jlxsFZtlmUyk+IXRVcBsvb1+aEvizlnvm97Dbm1Bw36u5oqxZdlW S130T2qU5wNzPb5qk8X0qJRwqks9OUo7CIb5Sig0b5tvhLZk00OLM37xxv1bow== Message-ID: <94cdbd05-33df-4cf6-87f9-62c94f95a373@bootlin.com> Date: Fri, 31 Jul 2026 08:15:52 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next v3 08/10] net: dsa: microchip: add KSZ8463 tail tag handling To: Jakub Kicinski Cc: Woojung Huh , UNGLinuxDriver@microchip.com, Andrew Lunn , Vladimir Oltean , "David S. Miller" , Eric Dumazet , Paolo Abeni , Richard Cochran , Russell King , Simon Horman , Maxime Chevallier , Pascal Eberhard , =?UTF-8?Q?Miqu=C3=A8l_Raynal?= , Thomas Petazzoni , netdev@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260727-ksz-new-ptp-v3-0-caba39e680e3@bootlin.com> <20260727-ksz-new-ptp-v3-8-caba39e680e3@bootlin.com> <20260730192308.6ae496ad@kernel.org> From: Bastien Curutchet Content-Language: en-US In-Reply-To: <20260730192308.6ae496ad@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Last-TLS-Session-Version: TLSv1.3 Hi Jakub, On 7/31/26 4:23 AM, Jakub Kicinski wrote: > On Mon, 27 Jul 2026 12:20:50 +0200 Bastien Curutchet (Schneider > Electric) wrote: >> KSZ8463 uses the KSZ9893 DSA TAG driver. However, the KSZ8463 doesn't >> use the tail tag to convey timestamps to the host as KSZ9893 does. It >> uses the reserved fields in the PTP header instead. > > Sigh, some of the marvell switches seem to be doing the same thing. > Is this the _only_ option this switch supports? > > Reserved fields in protocols are generally reserved, not free to use. No sadly, it's the only option this switch supports. Best regards, Bastien