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 4B32D409636; Mon, 15 Jun 2026 16:10:17 +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=1781539818; cv=none; b=stn3rVLhxmzaI0+U+IV1PR1NwdSvh6TrryzDSt6Wwdyj4z3XGyNA4wKI2Dth88/MF3q74WYLfxWAuoAgPxpBwfmWmDZsWisOLhBM3ZIPUpzyzJZKlvrAYF/j42gexv96mqP1Zi85GmlRXbGwhzW42l03NEs+mdqUcva51Z/vnw8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781539818; c=relaxed/simple; bh=4mxqW8AVI0jK2FpwPdzys8Gb9YWIetklNTMPOBbQpMs=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=PCuddjT6liLBOy0zvUWj1ELfUcXm4ACNKjRqJfGPIHtzvTJlh3EO2nJDVko2qtdjkCOXS/oQC5aOTwTBGqvXSJIzCO3x5chGvRVClCywIiJ9emiwTqnLaLf1cMV6uAQ3ipOGo9NaXU4Ijf4U9YTAK1fjd4SoHoMab5V65XLa64Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=dwEzd3VA; 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="dwEzd3VA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DB3DA1F00A3D; Mon, 15 Jun 2026 16:10:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781539817; bh=XgEw8VzDOeN00GX/f4SQZXmzNyfAjAdVxW2eorZU+eU=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=dwEzd3VADX2YsaAB3hEXO3VToWTfeY0gBFecLojFYV8vTjhKEy+BGcAEY/9HbxnRP hNXklnK91dihcYIZxbn6/bpzDag/VTX9cCIkmfdi+XQomA0AF1FzvVxsv6lmDlcw1g 0ShklUIfXD2vDaOyFBvELBaMmkBFi4CJ4oa/KnBSD4heu3UqWsKKE6i1co+Ah/4xmy MM6YZvht3bxrHsXBIBffOARbZpTxrNKImynlP4SHPA7AB64YUKSuL56nj/eB6dLOUC AMqjuuuOy3oUawqbhrIciEeS6so5lIKqByE1czU5/V/N8pdsvWspWCOJ8xbZZLdUzh Z/B7MVlYqJLhA== From: Vincent Mailhol Date: Mon, 15 Jun 2026 18:08:58 +0200 Subject: [PATCH 02/19] alpha: 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-v1-2-39c78fac42e2@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 , Richard Henderson , Matt Turner , Magnus Lindholm , linux-alpha@vger.kernel.org X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1760; i=mailhol@kernel.org; h=from:subject:message-id; bh=4mxqW8AVI0jK2FpwPdzys8Gb9YWIetklNTMPOBbQpMs=; b=owGbwMvMwCV2McXO4Xp97WbG02pJDFkGylfuSE/X95f0UXj9OuHgWuO0bS4rdio1H67WmtwV4 xqt9D2nYyILgxgXg6WYIsuyck5uhY5C77BDfy1h5rAygQyRFmlgAAIWBr7cxLxSIx0jPVNtQz1D IEPHiIGLUwCm+uVcRoa9rZn9vyJiSt5kVYpb7zc6vXQmi+Przr0pQkJ2F7Xli/cw/JWyS/yVOPu cbk/eja2Z2+Uc+u/e//Bn6epuJv9radrer5kB 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 alpha 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: Richard Henderson Cc: Matt Turner Cc: Magnus Lindholm Cc: linux-alpha@vger.kernel.org Signed-off-by: Vincent Mailhol --- arch/alpha/Kconfig | 1 + arch/alpha/include/asm/dps_root.h | 8 ++++++++ 2 files changed, 9 insertions(+) diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index 7b7dafe7d9df..400cbb7525c8 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -5,6 +5,7 @@ config ALPHA select ARCH_32BIT_USTAT_F_TINODE select ARCH_HAS_CURRENT_STACK_POINTER select ARCH_HAS_DMA_OPS if PCI + select ARCH_HAS_DPS_ROOT_PARTITION_TYPE_UUID select ARCH_MIGHT_HAVE_PC_PARPORT select ARCH_MIGHT_HAVE_PC_SERIO select ARCH_MODULE_NEEDS_WEAK_PER_CPU if SMP diff --git a/arch/alpha/include/asm/dps_root.h b/arch/alpha/include/asm/dps_root.h new file mode 100644 index 000000000000..7f70a83f72de --- /dev/null +++ b/arch/alpha/include/asm/dps_root.h @@ -0,0 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef _ASM_ALPHA_DPS_ROOT_H +#define _ASM_ALPHA_DPS_ROOT_H + +#define DPS_ROOT_PARTITION_TYPE_UUID "6523f8ae-3eb1-4e2a-a05a-18b695ae656f" + +#endif /* _ASM_ALPHA_DPS_ROOT_H */ -- 2.53.0