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Wed, 23 Oct 2024 20:07:44 +0000 To: Thomas Petazzoni CC: Niklas Cassel via buildroot , Niklas Cassel , Damien Le Moal , Kilian Zinnecker Thread-Topic: [Buildroot] [PATCH v3 3/4] configs/rock5b: use the arm64 rootfs partition-type-uuid Thread-Index: AQHbH87dqeCkGSwLtEKpvuffHiWtirKTSDyAgAAREQCAATWzAIAAP9KA Date: Wed, 23 Oct 2024 20:07:44 +0000 Message-ID: References: <20241016132443.3859149-1-niklas.cassel@wdc.com> <20241016132443.3859149-4-niklas.cassel@wdc.com> <20241022224945.4dc67b89@windsurf> <20241023181918.13ba7a70@windsurf> In-Reply-To: <20241023181918.13ba7a70@windsurf> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-publictraffictype: Email x-ms-traffictypediagnostic: SJ0PR04MB8326:EE_|PH0PR04MB7397:EE_ x-ms-office365-filtering-correlation-id: 7e03dd11-ed47-48aa-63e7-08dcf39e5b7e wdcipoutbound: EOP-TRUE x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; ARA:13230040|366016|1800799024|376014|38070700018; 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dmarc=pass (p=quarantine dis=none) header.from=wdc.com X-Mailman-Original-Authentication-Results: smtp2.osuosl.org; dkim=pass (2048-bit key, unprotected) header.d=wdc.com header.i=@wdc.com header.a=rsa-sha256 header.s=dkim.wdc.com header.b=A+TF4ojl; dkim=pass (1024-bit key, unprotected) header.d=sharedspace.onmicrosoft.com header.i=@sharedspace.onmicrosoft.com header.a=rsa-sha256 header.s=selector2-sharedspace-onmicrosoft-com header.b=DNiVtoyt X-Mailman-Original-Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=wdc.com; Subject: Re: [Buildroot] [PATCH v3 3/4] configs/rock5b: use the arm64 rootfs partition-type-uuid X-BeenThere: buildroot@buildroot.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Discussion and development of buildroot List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Niklas Cassel via buildroot Reply-To: Niklas Cassel Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: buildroot-bounces@buildroot.org Sender: "buildroot" Hello Thomas, On Wed, Oct 23, 2024 at 06:19:18PM +0200, Thomas Petazzoni wrote: > Hello Niklas, > > On Tue, 22 Oct 2024 21:50:51 +0000 > Niklas Cassel wrote: > > > I don't feel comfortable to change it for platforms that I don't have > > access too. > > Absolutely, but we can evolve what we can consider to be "the best > practice", documented in the manual. > > > The reason why I saw this was because u-boot has support for searching > > for a suitable rootfs (if CONFIG_PARTITION_TYPE_GUID). > > > > and then specifying the type using type= > > in e.g. PARTS_DEFAULT. > > PARTS_DEFAULT is used to assign the "partitions" environment variable, > but I don't see anything that uses that except the fastboot > implementation. So I believe this PARTS_DEFAULT is only used in > conjunction with fastboot, which is irrelevant to our discussion. I see. There obviously is code in uboot to automatically detect and use the uboot-environment based on the u-boot-env partition type GUID being detected. I didn't know if any u-boot code actually used PARTS_DEFAULT, or the root-arm64 partition type GUID, so it seemed better not to change the partition type GUID for any board I do not have access to. I could imagine some board supported by buildroot perhaps having a custom uboot script/config/patch that somehow depends on the rootfs GPT partition type GUID being what they currently have configured in their genimage.cfg. I tried to do a 'git grep ",type="' in buildroot, but I couldn't find anything interesting. I did find some ',type=' matches (related to PARTS_DEFAULT) in u-boot: https://github.com/u-boot/u-boot/blob/v2024.10/include/configs/starfive-visionfive2.h#L25 https://github.com/u-boot/u-boot/blob/v2024.10/include/configs/sifive-unleashed.h#L38 But perhaps PARTS_DEFAULT is only used by the fastboot support in u-boot, like you said. > I must say I'm a bit confused by your reasoning, which I have a hard > time following. Could you walk me more step by step? Either I'm missing > something (very possible), or you're missing something (also possible, > considering how crazy the U-Boot environment and boot flow is...). I think that it is most likely me who was missing something :) It is most likely safe to change the GPT partition type GUID for boards that use u-boot. (I have no idea about edk2 boards though...) I've already spent way too much time on getting the u-boot environment to work in a nice way. (I am happy for all the feedback that you gave, because of that we finally have a nice solution that hopefully will be emulated/copied by other boards.) But I have to respectfully decline to clean up the inconsistency with regards to root-arm64 vs b921b045-1df0-41c3-af44-4c6f280d3fae vs L. I have too many things on my todo list already (including some important non-trivial tasks that I wish I had finished already (if they only weren't so non-trivial :P)). Kind regards, Niklas _______________________________________________ buildroot mailing list buildroot@buildroot.org https://lists.buildroot.org/mailman/listinfo/buildroot