From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 D336140B6C8; Mon, 15 Jun 2026 16:10:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781539824; cv=none; b=mINrn1PqvMoCY3FJWN5Yp/KmsKkj+qV5A/8wNkn9tly0UGXbYSk6R7+PDv1Yq4o2GAqYH4y5oOI7zcJYH1LuT32US/M2Ic8hkq7D+esSaqp0pNeVXxdlPI/1dXgzyhOFUPIACAY3792ZBzT3PBBfmtC+Qr+yY5hcWsuKqJYLu8c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781539824; c=relaxed/simple; bh=buQA0OLsJoBfvfUeMOaxxlJAmvEFctKXcDw8iTDomJw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=lbFjldnTL3gwwTxDFcpx9Ct+mH9w24NQ88aPz+q+45EE5EokX3mUcsL7ddjpd4Da8jyo0ukqywaVHo+OoJtgQYjoSc9If1wnzy9qNpDzP0blmfqc4Q5X+kqBTigGCMZTiB4Cgs+LX1lw4JT3HFncQjnzLHhqJLK38h1g3itcsg0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ImWjuFDP; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ImWjuFDP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DC7051F00A3D; Mon, 15 Jun 2026 16:10:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781539823; bh=oavtcVs5GMUEYIHSjYOMZmbm65xOw75SXSw2tCo9C/Q=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=ImWjuFDPO6Xe+bOe18Xx7H8FSwtJc2F8hOBS98xRCMXBXkpzCz/lPIN8oY0vJkH9A h0jSfVJThF7ChGDW9k1EMfif+1OwATGLyDnRvRKbYdU491SJHdaFZn7XTwNpLKHnlO if7h6jeFFp0EMeUKOomAVxsYo4fJw/z4wQcqopTD1XG42oBfRHV1r2NXEs+TBmzyQy L8jWtwbITndX7YRP6tonb8C2ofQD01OUobSqj/MPogQRH9uBWU1A1XDkZ/H8eB8kT4 tJ1EMQPyp3xzhe+4a380wJH4IT/jL/NsPrkPF8ZARnMs/tWAW/PBdSHbqXOpRXVsY+ w8N0QtWoE97cg== From: Vincent Mailhol Date: Mon, 15 Jun 2026 18:09:00 +0200 Subject: [PATCH 04/19] arm: define DPS root partition type UUID Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260615-discoverable-root_partitions-v1-4-39c78fac42e2@kernel.org> References: <20260615-discoverable-root_partitions-v1-0-39c78fac42e2@kernel.org> In-Reply-To: <20260615-discoverable-root_partitions-v1-0-39c78fac42e2@kernel.org> To: Jens Axboe , Davidlohr Bueso , Alexander Viro , Christian Brauner , Jan Kara Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-efi@vger.kernel.org, linux-fsdevel@vger.kernel.org, Vincent Mailhol , Russell King , linux-arm-kernel@lists.infradead.org X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1645; i=mailhol@kernel.org; h=from:subject:message-id; bh=buQA0OLsJoBfvfUeMOaxxlJAmvEFctKXcDw8iTDomJw=; b=owGbwMvMwCV2McXO4Xp97WbG02pJDFkGylfu1+2t5847cU6x5rmgPENA1clQbvVX/pcec0hPe HzL9Mf2joksDGJcDJZiiizLyjm5FToKvcMO/bWEmcPKBDJEWqSBAQhYGPhyE/NKjXSM9Ey1DfUM gQwdIwYuTgGY6v13GRnOXLGy+qLWd9aTZ6KNhelUtX/iP7jCUoMrw6v83oqeVPJj+KeQ/2yqyMa cZ0/k2IvYJ76beSFWZfPdsyePrZ+74//i8CcsAA== X-Developer-Key: i=mailhol@kernel.org; a=openpgp; fpr=ED8F700574E67F20E574E8E2AB5FEB886DBB99C2 DPS [1] assigns GPT partition type UUIDs to operating system partitions. Root partitions use architecture-specific type UUIDs so the OS can discover the intended root filesystem without relying on a root= cmdline option. Define DPS_ROOT_PARTITION_TYPE_UUID in asm/dps_root.h for ARM and select ARCH_HAS_DPS_ROOT_PARTITION_TYPE_UUID. [1] The Discoverable Partitions Specification (DPS) Link: https://uapi-group.org/specifications/specs/discoverable_partitions_specification/ Cc: Russell King Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Vincent Mailhol --- arch/arm/Kconfig | 1 + arch/arm/include/asm/dps_root.h | 8 ++++++++ 2 files changed, 9 insertions(+) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 73e6647bea46..deedb5d808fb 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -14,6 +14,7 @@ config ARM select ARCH_HAS_DMA_ALLOC if MMU select ARCH_HAS_DMA_OPS select ARCH_HAS_DMA_WRITE_COMBINE if !ARM_DMA_MEM_BUFFERABLE + select ARCH_HAS_DPS_ROOT_PARTITION_TYPE_UUID select ARCH_HAS_ELF_RANDOMIZE select ARCH_HAS_FORTIFY_SOURCE select ARCH_HAS_KEEPINITRD diff --git a/arch/arm/include/asm/dps_root.h b/arch/arm/include/asm/dps_root.h new file mode 100644 index 000000000000..e9f0f24bcac2 --- /dev/null +++ b/arch/arm/include/asm/dps_root.h @@ -0,0 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef _ASM_ARM_DPS_ROOT_H +#define _ASM_ARM_DPS_ROOT_H + +#define DPS_ROOT_PARTITION_TYPE_UUID "69dad710-2ce4-4e3c-b16c-21a1d49abed3" + +#endif /* _ASM_ARM_DPS_ROOT_H */ -- 2.53.0