[{"id":3682608,"web_url":"http://patchwork.ozlabs.org/comment/3682608/","msgid":"","list_archive_url":null,"date":"2026-04-27T09:53:26","subject":"Re: [PATCH] hw/arm/raspi4b: NOP all DTB nodes when removing\n unimplemented devices","submitter":{"id":5111,"url":"http://patchwork.ozlabs.org/api/people/5111/","name":"Peter Maydell","email":"peter.maydell@linaro.org"},"content":"On Mon, 20 Apr 2026 at 17:21, Osama Abdelkader\n wrote:\n>\n> fdt_node_offset_by_compatible(fdt, -1, compat) only finds the first match.\n> If the blob has more than one node with the same compatible string, extra\n> nodes will remain active. using the same loop as imx8mp-evk.c\n>\n> Signed-off-by: Osama Abdelkader \n> ---\n\nI wondered about whether it would be worth abstracting this\nout into a helper function, but it looks like at the moment\nonly this raspi code and the imx8mp-evk do this. If we get\nmore places we want this we might do that, but not worth\nit for two.\n\nApplied to target-arm.next, thanks.\n\n-- PMM","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256\n header.s=google header.b=nd8klbQD;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists1p.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g3zSF0Yrkz1yHv\n\tfor ; Mon, 27 Apr 2026 19:54:35 +1000 (AEST)","from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists1p.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from )\n\tid 1wHIf5-0005qR-Hq; 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Mon, 27 Apr 2026\n 02:53:37 -0700 (PDT)","MIME-Version":"1.0","References":"<20260420162114.308519-1-osama.abdelkader@gmail.com>","In-Reply-To":"<20260420162114.308519-1-osama.abdelkader@gmail.com>","From":"Peter Maydell ","Date":"Mon, 27 Apr 2026 10:53:26 +0100","X-Gm-Features":"AQROBzAE4t_ZXEa8YFvZzm_2OWnRIwhP16mvAAH2-G0BLGlQMvupEBJjc8PBIBQ","Message-ID":"\n ","Subject":"Re: [PATCH] hw/arm/raspi4b: NOP all DTB nodes when removing\n unimplemented devices","To":"Osama Abdelkader ","Cc":"qemu-devel@nongnu.org, \"open list:ARM TCG CPUs\" ","Content-Type":"text/plain; charset=\"UTF-8\"","Received-SPF":"pass client-ip=2607:f8b0:4864:20::b12f;\n envelope-from=peter.maydell@linaro.org; helo=mail-yx1-xb12f.google.com","X-Spam_score_int":"-20","X-Spam_score":"-2.1","X-Spam_bar":"--","X-Spam_report":"(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=ham autolearn_force=no","X-Spam_action":"no action","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"qemu development ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"}},{"id":3682643,"web_url":"http://patchwork.ozlabs.org/comment/3682643/","msgid":"<9a0a42c7-a36f-48d1-9eb1-008d2565c342@linaro.org>","list_archive_url":null,"date":"2026-04-27T11:07:00","subject":"Re: [PATCH] hw/arm/raspi4b: NOP all DTB nodes when removing\n unimplemented devices","submitter":{"id":85046,"url":"http://patchwork.ozlabs.org/api/people/85046/","name":"Philippe Mathieu-Daudé","email":"philmd@linaro.org"},"content":"On 27/4/26 11:53, Peter Maydell wrote:\n> On Mon, 20 Apr 2026 at 17:21, Osama Abdelkader\n> wrote:\n>>\n>> fdt_node_offset_by_compatible(fdt, -1, compat) only finds the first match.\n>> If the blob has more than one node with the same compatible string, extra\n>> nodes will remain active. using the same loop as imx8mp-evk.c\n>>\n>> Signed-off-by: Osama Abdelkader \n>> ---\n> \n> I wondered about whether it would be worth abstracting this\n> out into a helper function, but it looks like at the moment\n> only this raspi code and the imx8mp-evk do this. If we get\n> more places we want this we might do that, but not worth\n> it for two.\n\nIIRC you were first against the approach of \"use a real world\ndtb and patch it\", recommending to \"generate a dtb with what\nwe emulate\"; and we merged that as 'temporary kludge until we\nproperly emulate the missing device'.","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256\n header.s=google header.b=IC/3Eokt;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists1p.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g41530Q4sz1xvV\n\tfor ; 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charset=UTF-8; format=flowed","Content-Transfer-Encoding":"7bit","Received-SPF":"pass client-ip=2a00:1450:4864:20::42b;\n envelope-from=philmd@linaro.org; helo=mail-wr1-x42b.google.com","X-Spam_score_int":"-20","X-Spam_score":"-2.1","X-Spam_bar":"--","X-Spam_report":"(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=ham autolearn_force=no","X-Spam_action":"no action","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"qemu development ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"}},{"id":3683593,"web_url":"http://patchwork.ozlabs.org/comment/3683593/","msgid":"","list_archive_url":null,"date":"2026-04-28T17:14:20","subject":"Re: [PATCH] hw/arm/raspi4b: NOP all DTB nodes when removing\n unimplemented devices","submitter":{"id":91532,"url":"http://patchwork.ozlabs.org/api/people/91532/","name":"Osama Abdelkader","email":"osama.abdelkader@gmail.com"},"content":"On Mon, Apr 27, 2026 at 01:07:00PM +0200, Philippe Mathieu-Daudé wrote:\n> On 27/4/26 11:53, Peter Maydell wrote:\n> > On Mon, 20 Apr 2026 at 17:21, Osama Abdelkader\n> > wrote:\n> > > \n> > > fdt_node_offset_by_compatible(fdt, -1, compat) only finds the first match.\n> > > If the blob has more than one node with the same compatible string, extra\n> > > nodes will remain active. using the same loop as imx8mp-evk.c\n> > > \n> > > Signed-off-by: Osama Abdelkader \n> > > ---\n> > \n> > I wondered about whether it would be worth abstracting this\n> > out into a helper function, but it looks like at the moment\n> > only this raspi code and the imx8mp-evk do this. If we get\n> > more places we want this we might do that, but not worth\n> > it for two.\n> \n> IIRC you were first against the approach of \"use a real world\n> dtb and patch it\", recommending to \"generate a dtb with what\n> we emulate\"; and we merged that as 'temporary kludge until we\n> properly emulate the missing device'.\n\nThanks Peter and Philippe for the clarification, I would be happy to participate\nin that solution too.\n\nBest regards,\nOsama","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=ekAHlnA1;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists1p.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g4nBP2hSSz1yHv\n\tfor ; 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