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 A44CD32ED5B; Fri, 31 Oct 2025 23:58:22 +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=1761955102; cv=none; b=bmgA6bGfc/SOhn/OKKeaV2lYA/yk9FGd321+yhaGPxoCQMEvLUkBWga1GYIsnyLYGD34uXn2GKnkeT0zLtdled1ts7skYRNE73D/smmdKtXafHLA5Mh/hc5RdaiCrO+A/OIsm3Xuom8rkzrbB0JIXsVESdGxx2c1T/wCorcnkAY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761955102; c=relaxed/simple; bh=6lDOXEoS0ooUoLPXtfjnnWqan0MhKFfz/xn5trjVv74=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=oRBidsdyOuDxIucLtCpMIylFD/22y970MOE/ORYcDuquvYDEWpH92kFeBqQaD7fsK0wLLU/wp8pA+vEC/+ehakwIrMuF//Nh9N1d5JMsq3AGWIMX/49YDTOtY7aj+JN6KSrSQ6ygtY22zF/TeFhAdYQQAmfCL6qckINH1EMQclE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=HBwnA3q/; 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="HBwnA3q/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B0CBDC4CEE7; Fri, 31 Oct 2025 23:58:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761955102; bh=6lDOXEoS0ooUoLPXtfjnnWqan0MhKFfz/xn5trjVv74=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=HBwnA3q/4VrCnBUyLdFAd2u11xKRZxNnGOmAMH1ehoXyS/tf6Rvi1hDkw+d9AZWUP VxaAuTtBPrxuzf4VAGJj4xFaO+Cw6NSwHRbAc65r9L4bqgs++DGpTXzVaaO3WRPzGQ TkI+FIVibKRhhqUNWhXOXsmm1l907+2I+eagTnsx9mjOKhL/FgCBSYuOmeiBti4o7V mfbwIkxfBbjPtvklcb1P0lHV37CC1v0Mjm1qGpjvz270/+9lyXp0c+8kjbB1w1oiy5 eD+p9DRP9fLbgKuqnGzPhN129a6Dytfv3U+uTfU/IN97iK3IArKA76yiLIGWbQaGSY zO9MIBeoEE9BA== Date: Fri, 31 Oct 2025 16:58:20 -0700 From: Jakub Kicinski To: Wen Gu Cc: richardcochran@gmail.com, 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 Subject: Re: [PATCH net-next v5 1/2] ptp: introduce Alibaba CIPU PHC driver Message-ID: <20251031165820.70353b68@kernel.org> In-Reply-To: <20251030121314.56729-2-guwen@linux.alibaba.com> References: <20251030121314.56729-1-guwen@linux.alibaba.com> <20251030121314.56729-2-guwen@linux.alibaba.com> 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 Thu, 30 Oct 2025 20:13:13 +0800 Wen Gu wrote: > This adds a driver for Alibaba CIPU PTP clock. The CIPU, an underlying > infrastructure of Alibaba Cloud, synchronizes time with atomic clocks > via the network and provides microsecond or sub-microsecond precision > timestamps for VMs and bare metals on cloud. > > User space processes, such as chrony, running in VMs or on bare metals > can get the high precision time through the PTP device exposed by this > driver. As mentioned on previous revisions this is a pure clock device which has nothing to do with networking and PTP. There should be a separate class for "hypervisor clocks", if not a common driver. -- pw-bot: cr