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From: Grant Likely <grant.likely@secretlab.ca>
To: Tom Rini <trini@konsulko.com>
Cc: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>,
	u-boot@lists.denx.de, Andre Przywara <andre.przywara@arm.com>,
	Heinrich Schuchardt <xypron.glpk@gmx.de>,
	Alexander Graf <agraf@csgraf.de>
Subject: Re: [PATCH 1/1] efi_loader: stop watchdogs in ExitBootServices()
Date: Tue, 9 Nov 2021 23:45:40 +0000	[thread overview]
Message-ID: <CACxGe6vOjURq8TryWz6FW+cLy7DZW=Q=f_0Kth5q_5T=86h+nw@mail.gmail.com> (raw)
In-Reply-To: <20211109175526.GW24579@bill-the-cat>

On Tue, Nov 9, 2021 at 5:55 PM Tom Rini <trini@konsulko.com> wrote:
>
> On Tue, Nov 09, 2021 at 11:19:01AM +0100, Heinrich Schuchardt wrote:
>
> > The UEFI specification requires for ExitBootServices() that "the boot
> > services watchdog timer is disabled". We already disable the software
> > watchdog. We should additionally disable the hardware watchdogs.
> >
> > Reported-by: Andre Przywara <andre.przywara@arm.com>
> > Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
>
> Let me start by saying thank you for bringing this up with UEFI folks as
> well.  To be clear, for right now I would much rather see U-Boot
> continue to be non-complaint with UEFI in this regard and assume that a
> running watchdog will be able to be handled by the running OS (which
> tends to be the case, but not always as sunxi has just shown) than to
> attempt to be complaint with the spec as it stands now as I am hopeful
> that we can get this case handled in a way that matches long standing
> industry practice.

I’m also not keen to see the watchdogs disabled, even if it does make
platforms technically non-compliant with UEFI. Disabling the watchdog
does not make sense for throw devices using U-Boot get used.

I’ll put this on the agenda for the next EBBR biweekly

g.

>
> --
> Tom

  parent reply	other threads:[~2021-11-09 23:46 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-09 10:19 [PATCH 1/1] efi_loader: stop watchdogs in ExitBootServices() Heinrich Schuchardt
2021-11-09 10:19 ` Heinrich Schuchardt
2021-11-09 14:20   ` Michael Walle
2021-11-09 14:46     ` Mark Kettenis
2021-11-09 14:54       ` Michael Walle
2021-11-09 17:30         ` Heinrich Schuchardt
2021-11-09 17:55   ` Tom Rini
2021-11-09 18:15     ` Heinrich Schuchardt
2021-11-09 18:18       ` Tom Rini
2021-11-09 21:47         ` Andre Przywara
2021-11-09 23:45     ` Grant Likely [this message]
2023-01-28  8:57 Heinrich Schuchardt
2023-01-30 18:13 ` Tom Rini
2023-01-30 18:30   ` Tom Rini
2023-01-31 12:03     ` Ilias Apalodimas
2023-01-31 14:16       ` Simon Glass
2023-01-31 14:48         ` Heinrich Schuchardt
2023-01-31 15:07       ` Tom Rini
2023-02-01  8:32         ` Rasmus Villemoes
2023-02-01  9:00           ` Heinrich Schuchardt
2023-02-02  8:17             ` Etienne Carriere
2023-02-02 17:12               ` Simon Glass
2023-02-02 17:22                 ` Tom Rini
2023-02-03  2:15                   ` Simon Glass
2023-02-03  7:30                     ` Rasmus Villemoes
2023-02-07 14:59                       ` Michael Walle
2023-02-07 15:08                         ` Heinrich Schuchardt
2023-02-07 15:29                           ` Michael Walle
2023-02-07 15:30                             ` Heinrich Schuchardt
2023-02-07 15:34                               ` Michael Walle
2023-02-03 15:51                     ` Tom Rini
2023-02-04  0:20                       ` Simon Glass
2023-02-01 12:49           ` Mark Kettenis
2023-02-01 15:21             ` Tom Rini

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