linux-kernel - Re: [PATCH RT] rtc: Disable RTC_DRV

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Date:   Thu, 26 Jul 2018 14:52:21 +0200
From:   Ard Biesheuvel <ard.biesheuvel@...aro.org>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Steven Rostedt <rostedt@...dmis.org>,
        linux-rt-users@...r.kernel.org,
        Marc Zyngier <marc.zyngier@....com>,
        linux-efi <linux-efi@...r.kernel.org>,
        Anna-Maria Gleixner <anna-maria@...utronix.de>
Subject: Re: [PATCH RT] rtc: Disable RTC_DRV_EFI on RT



> On 26 Jul 2018, at 14:46, Sebastian Andrzej Siewior <bigeasy@...utronix.de> wrote:
> 
>> On 2018-07-26 14:26:25 [+0200], Ard Biesheuvel wrote:
>> What i mean is whatever you end up with if you pass efi=noruntime to the kernel.
> ah. So I wouldn't have to patch this, just document it. That might work.
> 

We could also make it the default on -rt, but not disable it entirely, so that efi=runtime can be used to re-enable it.


>> But as i mentioned before, you may also lose the ability to reboot/shut down your system this way. Can you please double check?
> 
> I checked before posting the patch. psci is used instead (on softiron
> here, have nothing else). psci_sys_poweroff() works.
> 
> Sebastian