From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Tue, 17 Jun 2025 10:49:17 +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 1uRS0L-008DJ8-0a for lore@lore.pengutronix.de; Tue, 17 Jun 2025 10:49:17 +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 1uRS0K-000772-KH for lore@pengutronix.de; Tue, 17 Jun 2025 10:49:17 +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:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; 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Tue, 17 Jun 2025 10:42:01 +0200 Received: from pty.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::c5]) 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 1uRRtJ-003wcm-0A; Tue, 17 Jun 2025 10:42:01 +0200 Received: from sha by pty.whiteo.stw.pengutronix.de with local (Exim 4.96) (envelope-from ) id 1uRRtI-001OOZ-33; Tue, 17 Jun 2025 10:42:00 +0200 Date: Tue, 17 Jun 2025 10:42:00 +0200 From: Sascha Hauer To: Lars Schmidt Cc: BAREBOX Message-ID: References: <20250616-bootchooser-lock-v2-0-df1f0d118635@pengutronix.de> <20250616-bootchooser-lock-v2-3-df1f0d118635@pengutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250616-bootchooser-lock-v2-3-df1f0d118635@pengutronix.de> X-Sent-From: Pengutronix Hildesheim X-URL: http://www.pengutronix.de/ X-Accept-Language: de,en X-Accept-Content-Type: text/plain X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250617_014202_577225_D5801EE5 X-CRM114-Status: GOOD ( 22.96 ) 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=-6.2 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: Re: [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) On Mon, Jun 16, 2025 at 05:06:56PM +0200, Lars Schmidt wrote: > 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. This describes what it does, but not what it's good for. Could you add a few sentences about it? Sascha -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |