From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 2FB6B31AF1E; Tue, 16 Dec 2025 21:58:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765922330; cv=none; b=HpSy7RW7uDkWg8LmZXEEKvnU60SfzpeYvuDPvsQedSv6v+5rUhL8FYegB5B4FHvHrlcGDhOWemqNuzVJSE6VKiFcxw/PG6lEPufONLI6b3Xj33QVxLwuquWOBqXVkFfy1f/NrbdqIOcYZjXVNt9ZW3liOZtXMS/iXmGAPvQjgJc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765922330; c=relaxed/simple; bh=J4UYQDKzCH/5iGNRAtJadt8ptSMV0RITVhETmRl0sB0=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Wci+mtwY9URr6Jcow2A0m1b5DDig4DUumQUsk9GDBhFP5QTs2maDZQJWPdk8Q9zM4DVCr+mu9GniulfJv12yHpoxaCuMEK6ptlyp0A9IipYhOZLcTyMpM5tyeADkPQyO4iQ19cJrM7AoclP681CEIMuoL07zzk+P/B4LA3yuv30= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CmYjVQVX; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="CmYjVQVX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 51FF9C4CEF1; Tue, 16 Dec 2025 21:58:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1765922329; bh=J4UYQDKzCH/5iGNRAtJadt8ptSMV0RITVhETmRl0sB0=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=CmYjVQVXNuPupYfcs2dMk44NM5masx14KTaUxiE49W/r8V+AudxPnBoon9g13etEx 6LbEIdHUxzvkJUKUf9D8HBvC8vZEjmAtxwyjt9kivKHMqeWU+835uXtEG26v75ISsz yK2GPTmF8Kp8tzcXsBeErERw2Q24SPRgR2oxZBuNEaaZtWRC1e/M9FMGcaPR26FHgU qwlX841Meuc6LESbdv+lPTu3p2Ldhv2N5FZcnbrnm7wVB3MnEQCmLHxxxSamGN1t7l 5sGV/DKDxj1BT0D92EEm5BkP5syseYe4E/WZF3CFrfMK0ewwTmrP29MlwNboWF/wiv p/GJYH8VGkxpw== Date: Tue, 16 Dec 2025 13:58:48 -0800 From: Jakub Kicinski To: Wen Gu Cc: Richard Cochran , andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, pabeni@redhat.com, xuanzhuo@linux.alibaba.com, dust.li@linux.alibaba.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Gleixner Subject: Re: [PATCH net-next v5 1/2] ptp: introduce Alibaba CIPU PHC driver Message-ID: <20251216135848.174e010f@kernel.org> In-Reply-To: References: <20251030121314.56729-1-guwen@linux.alibaba.com> <20251030121314.56729-2-guwen@linux.alibaba.com> <20251031165820.70353b68@kernel.org> <8a74f801-1de5-4a1d-adc7-66a91221485d@linux.alibaba.com> <20251105162429.37127978@kernel.org> <34b30157-6d67-46ec-abde-da9087fbf318@linux.alibaba.com> <20251127083610.6b66a728@kernel.org> <20251128102437.7657f88f@kernel.org> <9a75e3b2-4d1c-4911-81e4-cab988c24b77@linux.alibaba.com> <20251213075028.2f570f23@kernel.org> 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-Transfer-Encoding: 7bit On Sun, 14 Dec 2025 22:03:57 +0800 Wen Gu wrote: > If you're suggesting creating a new subsystem, I think we should first > answer this question: why can't it be part of the current ptp subsystem, > and what are the differences between the drivers under `drivers/ptp` > and those in the new subsystem? I can't explain it any better than I already did here: https://lore.kernel.org/all/20251127083610.6b66a728@kernel.org/ I talked to Thomas Gleixner (added to CC) during LPC and he seemed open to creating a PHC subsystem for pure time devices in virtualized environments. Please work with him and other vendors trying to upstream similar drivers.