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[2001:470:26:54b:226:9eff:fe70:80c2]) by smtp.gmail.com with ESMTPSA id r15-20020ac24d0f000000b00494a2a0f6cfsm129475lfi.183.2022.09.08.22.59.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Sep 2022 22:59:31 -0700 (PDT) Received: from home.paul.comp (home.paul.comp [IPv6:0:0:0:0:0:0:0:1]) by home.paul.comp (8.15.2/8.15.2/Debian-22) with ESMTP id 2895xRB0020092; Fri, 9 Sep 2022 08:59:29 +0300 Received: (from paul@localhost) by home.paul.comp (8.15.2/8.15.2/Submit) id 2895xPve020091; Fri, 9 Sep 2022 08:59:25 +0300 Date: Fri, 9 Sep 2022 08:59:25 +0300 From: Paul Fertser To: Jiaqing Zhao Cc: Samuel Mendoza-Jonas , "David S. Miller" , Eric Dumazet , Paolo Abeni , netdev@vger.kernel.org, openbmc@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] net/ncsi: Add Intel OS2BMC OEM command Message-ID: References: <20220909025716.2610386-1-jiaqing.zhao@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220909025716.2610386-1-jiaqing.zhao@linux.intel.com> X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, On Fri, Sep 09, 2022 at 10:57:17AM +0800, Jiaqing Zhao wrote: > The Intel OS2BMC OEM NCSI command is used for controlling whether > network traffic between host and sideband is allowed or not. By > default such traffic is disallowed, meaning that if the device using > NCS (usually BMC) does not have extra active connection, it cannot > reach the host. Can you please explain the rationale behind introducing this as a compile-time kernel config option? I can probably imagine how this can make sense as a DT switch (e.g. to describe hardware where there's no other communication channel between the host and BMC) but even this feels far-fetched. Can you please outline some particular use cases for this feature? -- Be free, use free (http://www.gnu.org/philosophy/free-sw.html) software! mailto:fercerpav@gmail.com