From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Mon, 16 Jun 2025 17:28:39 +0200 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1uRBlH-007xnL-1Y for lore@lore.pengutronix.de; Mon, 16 Jun 2025 17:28:39 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1uRBlG-00020H-Ry for lore@pengutronix.de; Mon, 16 Jun 2025 17:28:39 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References :Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=+Bb4rOLGivWqEoVCUlB2as33QRagtYe8JH8LxY7y6yE=; b=TMSXPGujXDnBIX7qmpCwlb8Lbi a/gx8mzUey31AOviTQrogh4W0DvIMp0aFZauqwQz4vs6nmz1kZdtN6311iCfclDajwoCzuvqTU+zY 9qTENBEXmiLMdz1jqCREXqdykc5n8vKwp/QhYsm1tmHxMJEx0pE8sJsNvySiGOohKmu6t/a0WLI+x xdODQYToLigu/jThX5D3ymGkqI/evZ1p0W9YOzldU9LSVRYQJQvAzKGb7DpcjLmAHgr6dfsrT2zb4 sX+O0zUsCFF8Xoejik12xFUPzfFsTd72BZoGR9auOB+CCHlXmW9X+F9NTgT1Ncq7lPI2on29w3zlw mE6YAzuw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uRBkp-00000004s4v-1dKV; Mon, 16 Jun 2025 15:28:11 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uRBQS-00000004nWW-3v5l for barebox@lists.infradead.org; Mon, 16 Jun 2025 15:07:10 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1uRBQP-0007fO-Il; Mon, 16 Jun 2025 17:07:05 +0200 Received: from dude06.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::5c]) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1uRBQP-003pFW-14; Mon, 16 Jun 2025 17:07:05 +0200 Received: from localhost ([::1] helo=dude06.red.stw.pengutronix.de) by dude06.red.stw.pengutronix.de with esmtp (Exim 4.96) (envelope-from ) id 1uRBQP-00Gw36-2z; Mon, 16 Jun 2025 17:07:05 +0200 From: Lars Schmidt Date: Mon, 16 Jun 2025 17:06:56 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250616-bootchooser-lock-v2-3-df1f0d118635@pengutronix.de> References: <20250616-bootchooser-lock-v2-0-df1f0d118635@pengutronix.de> In-Reply-To: <20250616-bootchooser-lock-v2-0-df1f0d118635@pengutronix.de> To: Sascha Hauer , BAREBOX Cc: Lars Schmidt X-Mailer: b4 0.14.2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250616_080708_978174_0A18D74A X-CRM114-Status: GOOD ( 11.09 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-6.3 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH v2 3/4] Documentation: bootchooser: add information about attempts_locked X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) The new attempts_locked variable does have influence on remaining_attempts counter. While at it, also make mention in the bootstate.dtsi. Signed-off-by: Lars Schmidt --- Documentation/user/bootchooser.rst | 23 +++++++++++++++++++++++ arch/arm/dts/bootstate.dtsi | 5 +++++ 2 files changed, 28 insertions(+) diff --git a/Documentation/user/bootchooser.rst b/Documentation/user/bootchooser.rst index 351e1d14e1ead6ba8d329c03c0bc7ed28b523df0..ab0b6c3fc895226f5aa4590944a2cd675a56d985 100644 --- a/Documentation/user/bootchooser.rst +++ b/Documentation/user/bootchooser.rst @@ -77,6 +77,16 @@ no remaining attempts left. To prevent ending up in an unbootable system after a number of failed boot attempts, there is also a built-in mechanism to reset the counters to their defaults, controlled by the ``global.bootchooser.reset_attempts`` variable. +Alternatively, counting down the remaining attempts can be disabled by +locking bootchooser boot attempts. +This is done by defining a (32-bit) ``attempts_locked`` variable in the +bootstate and setting its value to ``1`` (usually from userspace). + +The variable affects all targets, is optional and its absence is +interpreted as ``0``, meaning that attempts are decremented normally. + +The ``attempts_locked`` value does not influence the decision on which target +to boot if any, only whether to decrement the attempts when booting. If ``global.bootchooser.retry`` is enabled (set to ``1``), the bootchooser algorithm will iterate through all valid boot targets (and decrease their @@ -107,6 +117,19 @@ on the :ref:`reset reason ` (i.e. != WDG) using the This will reset the ``remaining_attempts`` counter of the *last chosen* slot to its default value (``reset_attempts``). +Another option is to use ``attempts_locked``. Normally this should be controlled from +Linux userspace using the *barebox-state* tool, i.e.:: + + barebox-state -s bootstate.attempts_locked=1 + +It can also be locked via the :ref:`bootchooser command `:: + + bootchooser -l + +or unlocked:: + + bootchooser -L + .. _dt-utils: https://git.pengutronix.de/cgit/tools/dt-utils diff --git a/arch/arm/dts/bootstate.dtsi b/arch/arm/dts/bootstate.dtsi index aa767d4e3b966244b01702bbc2bdcd5c95ef7009..733441fb2697b283dc784b00b012e11ad671bb15 100644 --- a/arch/arm/dts/bootstate.dtsi +++ b/arch/arm/dts/bootstate.dtsi @@ -42,4 +42,9 @@ last_chosen@10 { reg = <0x10 0x4>; type = "uint32"; }; + + attempts_locked@14 { + reg = <0x14 0x4>; + type = "uint32"; + }; }; -- 2.39.5