From: joeyli <jlee@suse.com>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Ard Biesheuvel <ardb@kernel.org>,
linux-efi <linux-efi@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 1/2] efi: Disable runtime services on RT
Date: Wed, 20 Oct 2021 14:09:55 +0800 [thread overview]
Message-ID: <20211020060955.GC3965@linux-l9pv.suse> (raw)
In-Reply-To: <20210928142434.uqhkd3ribja6j654@linutronix.de>
On Tue, Sep 28, 2021 at 04:24:34PM +0200, Sebastian Andrzej Siewior wrote:
> On 2021-09-28 15:34:47 [+0200], Ard Biesheuvel wrote:
> > Are you sure you want to disable EFI runtime services on all x86
> > systems with PREEMPT_RT as well?
>
> The only problem that I am aware of is that you need to reboot with
> enabled runtime service (via bootargs, #2) in order to alter boot loader
> settings.
Just provide another case:
Anyone who uses mokutil for enrolling MOK will also need reboot with
efi=runtime first.
> I'm not aware of any other shortcomings. There are no guarantees how
> long an EFI service routine may take.
> That patch is in the RT queue since v4.18-rc8-rt1.
>
> Sebastian
Joey Lee
next prev parent reply other threads:[~2021-10-20 6:10 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-24 13:49 [PATCH 0/2] efi: Disable runtime services on RT Sebastian Andrzej Siewior
2021-09-24 13:49 ` [PATCH 1/2] " Sebastian Andrzej Siewior
2021-09-28 13:30 ` Ard Biesheuvel
2021-09-28 13:33 ` Sebastian Andrzej Siewior
2021-09-28 13:34 ` Ard Biesheuvel
2021-09-28 14:24 ` Sebastian Andrzej Siewior
2021-10-20 6:09 ` joeyli [this message]
2021-10-20 6:28 ` Sebastian Andrzej Siewior
2021-10-20 6:47 ` joeyli
2021-10-20 7:20 ` Sebastian Andrzej Siewior
2021-09-28 20:28 ` Thomas Gleixner
2021-09-28 20:41 ` Ard Biesheuvel
2021-09-24 13:49 ` [PATCH 2/2] efi: Allow efi=runtime Sebastian Andrzej Siewior
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