All of lore.kernel.org
 help / color / mirror / Atom feed
From: Tom Rini <trini@konsulko.com>
To: u-boot@lists.denx.de
Subject: [PATCH 2/2] watchdog: add watchdog behavior configuration
Date: Fri, 25 Sep 2020 09:00:39 -0400	[thread overview]
Message-ID: <20200925130039.GI14816@bill-the-cat> (raw)
In-Reply-To: <ceeb82b7-eef0-7435-0d0c-958c0bf07e04@gmx.de>

On Fri, Sep 25, 2020 at 01:29:18PM +0200, Heinrich Schuchardt wrote:
> On 25.09.20 10:36, Wolfgang Denk wrote:
> > Dear Tom,
> >
> > In message <20200924131931.GF14816@bill-the-cat> you wrote:
> >>
> >> I'm talking about the case where we say we've enabled the WDT to
> >> supervise OS, but then bootefi something and have disabled the watchdog
> >> (to meet UEFI requirements) but didn't tell the user we've turned off
> >> the WDT that we had told them is on.
> >
> > Any so-called "watchdog" that can be disabled / switched off by
> > software is not really woth this name.  As such, the concept of
> > disabling a watchdog in software, is misleading at best and should
> > never ibe implemented.
> 
> If we want to boot UEFI payloads, we will have to follow the UEFI
> specification even if we think it is not perfect.

I really really want to know what the UEFI specification says about
hardware watchdogs.  Especially given the push to use a subset of UEFI
for embedded.  Most modern SoCs include a watchdog IP block and it can
be used for a traditional watchdog and it's also used for reset.  Or
simply must be serviced periodically.

-- 
Tom
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 659 bytes
Desc: not available
URL: <https://lists.denx.de/pipermail/u-boot/attachments/20200925/31854b6f/attachment.sig>

  reply	other threads:[~2020-09-25 13:00 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-23 16:45 [PATCH 1/2] watchdog: Hide WATCHDOG_RESET_DISABLE Michael Walle
2020-09-23 16:45 ` [PATCH 2/2] watchdog: add watchdog behavior configuration Michael Walle
2020-09-23 17:01   ` Mark Kettenis
2020-09-23 17:14     ` Tom Rini
2020-09-23 17:31       ` Heinrich Schuchardt
2020-09-23 17:35         ` Tom Rini
2020-09-24  7:33           ` Michael Walle
2020-09-24  8:10             ` Mark Kettenis
2020-09-24  8:20               ` Michael Walle
2020-09-24 10:22                 ` Mark Kettenis
2020-09-24 21:05                   ` Michael Walle
2020-09-24 13:19             ` Tom Rini
2020-09-24 20:30               ` Michael Walle
2020-09-24 20:58                 ` Mark Kettenis
2020-09-24 21:14                   ` Michael Walle
2020-09-25  1:17                     ` Tom Rini
2020-09-25  8:36               ` Wolfgang Denk
2020-09-25 11:29                 ` Heinrich Schuchardt
2020-09-25 13:00                   ` Tom Rini [this message]
2020-09-25 13:26                     ` Heinrich Schuchardt
2020-09-26  8:45                       ` Wolfgang Denk
2020-09-26 10:54                         ` Mark Kettenis
2020-09-26 12:39                           ` Heinrich Schuchardt
2020-09-26 12:44                             ` Tom Rini
2020-09-27 16:06                               ` Michael Walle
2020-09-28 15:34                                 ` Tom Rini
2020-09-26 14:40                             ` Wolfgang Denk
2020-09-26 14:22                           ` Wolfgang Denk
2020-09-25 13:04                   ` Wolfgang Denk
2020-10-04 14:55                     ` Michael Walle
2020-10-04 15:10                       ` Heinrich Schuchardt
2020-10-04 15:40                         ` Tom Rini
2020-09-23 17:53       ` Mark Kettenis
2020-09-23 18:51         ` Heinrich Schuchardt
2020-09-23 19:02           ` Tom Rini
2020-09-23 20:01             ` Heinrich Schuchardt
2020-09-23 20:23               ` Tom Rini
2020-09-23 20:58                 ` Heinrich Schuchardt
2020-09-23 21:09                   ` Tom Rini
2020-09-23 20:38           ` Michael Walle
2020-09-23 21:01             ` Heinrich Schuchardt
2020-09-23 17:21   ` Heinrich Schuchardt
2020-09-23 17:28     ` Tom Rini
2020-09-24  6:53       ` Michael Walle

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200925130039.GI14816@bill-the-cat \
    --to=trini@konsulko.com \
    --cc=u-boot@lists.denx.de \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.