From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iNWi5-00008f-9s for barebox@lists.infradead.org; Thu, 24 Oct 2019 06:35:02 +0000 Date: Thu, 24 Oct 2019 08:34:54 +0200 From: Oleksij Rempel Message-ID: <20191024063454.675awgrk24l4fwmu@pengutronix.de> References: <20191023165601.16441-1-a.fatoum@pengutronix.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20191023165601.16441-1-a.fatoum@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: [PATCH 1/6] Documentation: efi: emphasize watchdog deactivation on ExitBootServices To: Ahmad Fatoum Cc: barebox@lists.infradead.org On Wed, Oct 23, 2019 at 06:55:56PM +0200, Ahmad Fatoum wrote: > The UEFI specification paragraph quoted above notes: > > The watchdog timer is only used during boot services. On successful > > completion of ExitBootServices() the watchdog timer is disabled. > > Thus disabling the watchdog is _the_ only proper behavior. Adjust the > wording accordingly. > > Cc: Oleksij Rempel > Signed-off-by: Ahmad Fatoum > --- > Documentation/boards/efi.rst | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/Documentation/boards/efi.rst b/Documentation/boards/efi.rst > index 2178c9ab4293..f04b1d32378b 100644 > --- a/Documentation/boards/efi.rst > +++ b/Documentation/boards/efi.rst > @@ -350,7 +350,7 @@ https://uefi.org/sites/default/files/resources/UEFI_Spec_2_1_D.pdf > > Current linux kernel (v5.0) will execute ExitBootServices() during the early > boot stage and thus will automatically disable the (U)EFI watchdog. Since it is > -a proper behavior according to the (U)EFI specification, it is impossible to > +the proper behavior according to the (U)EFI specification, it is impossible to > protect full boot chain by using this watchdog only. It is recommended to use > an alternative hardware watchdog, preferably started before the bootloader. If (U)EFI > firmware lacks this feature, the bootloader should be able to start an alternative > -- > 2.23.0 > > Reviewed-by: -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox