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 B85F414A82; Fri, 25 Jul 2025 07:33:02 +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=1753428782; cv=none; b=cuYV71f2w9XGh5+vb1mbD2EckDLsYGLWNYpTfy5e9zPun4NQam7QDnTGRpCOqcj14jR18K5lZnpWhgmfu8EbT/T68syBUjt44iRZ6F9xKoW0AoLwvP63WOAo2o8GnCuoNE5uYOhqIJGmKJhr9YdYm/mJXnFFRbMExsTyPbubVws= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753428782; c=relaxed/simple; bh=RT/fwDnGe1qjIsPKvMaRgsEa02/AzXXBqKEFbagKISs=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=e8aZMczqGllDp0JgmxygW2YLqqBRGfKphqb83Mjit2M/TvJfuB6CtU8fkzONLWbZIS6hHrKU2Z2v2bgICh+zRbOYR91uWxesfLc47BzIygyY/3tBt7pONHbaPbxBgoSc6uvc/JDAzza9fxSdUczpBYYfr4RhhzvtgYQLa31g43Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=qLcBh6xs; 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="qLcBh6xs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C14F7C4CEE7; Fri, 25 Jul 2025 07:32:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1753428782; bh=RT/fwDnGe1qjIsPKvMaRgsEa02/AzXXBqKEFbagKISs=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=qLcBh6xs2UtKYMDfxxSK6kMKJ1BTvTh2QE26LJYBoRpqxwF5geb++QKfO66u1oI/a vUaMQHLV8gveKfVtJMTQ2CBWRO8ji/UM9ZnnAp+X5/8M+LQB46ajDlpFn13sFryV0o wYqknp8UlWoZFVJrcEv4jVJ4DvPwI5SkpJf5zLn/57zOtnljR1BRRhuEijsK/5BX9Y QYaqy55F6yjidELOX7xRmyCd5qvS94Mc4CIhMGomVLW7Zd5JsTBlBV6Isc4Rf/FRD2 Vs/vPPZMsnHc9WH2CZ+5zLNQhvjZIvFwXN9KOkp5pH99BM5iBIBF8Kyndg2tnejTBy P1ji3zrLC3r/A== Message-ID: <94d3e709-8c8b-40cb-a829-92c2012b4e0a@kernel.org> Date: Fri, 25 Jul 2025 09:32:56 +0200 Precedence: bulk X-Mailing-List: linux-hyperv@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 1/2] dt-bindings: microsoft: Add vmbus message-connection-id property To: Hardik Garg Cc: apais@microsoft.com, cho@microsoft.com, conor+dt@kernel.org, decui@microsoft.com, devicetree@vger.kernel.org, haiyangz@microsoft.com, hargar@microsoft.com, krzk+dt@kernel.org, kys@microsoft.com, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, robh@kernel.org, ssengar@linux.microsoft.com, wei.liu@kernel.org References: <6d3b5d1e-de1b-4d3b-ba14-7029c51b8e05@kernel.org> <1753395133-26061-1-git-send-email-hargar@linux.microsoft.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 25/07/2025 00:12, Hardik Garg wrote: >> Then all guests can use the same value, 0, making this property redundant. > > No, they cannot use the same value. The protocol requires different connection IDs for different communication paths. > For example, a guest communicating with a VTL0 control plane uses a different connection ID than one communicating with > a VTL2 control plane. The host specifies this value based on the guest's configuration, and there is no other discovery > method available to determine the correct connection ID. You completely removed entire thread and discussion making it difficult to connect to one of 100 or more discussions I am doing. Plus wrap your emails according to netiquette rules. The guest should not care about the value. Otherwise what if guests decides to ignore your DT property and start using other value? Sniffing other guests traffic? Causing conflicts or denial of service? If different values are important for the host, then all guests should use whatever 0 which will map to different values on host by other means of your protocol. Best regards, Krzysztof