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References: <20210924134919.1913476-1-bigeasy@linutronix.de>
 <20210924134919.1913476-2-bigeasy@linutronix.de> <CAMj1kXFJm-su9tc20n+DyJjMwrhK6R4BR0Kd_ov62NqXd-jwUw@mail.gmail.com>
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In-Reply-To: <20210928133340.tmpjzdj367h54ddt@linutronix.de>
From:   Ard Biesheuvel <ardb@kernel.org>
Date:   Tue, 28 Sep 2021 15:34:47 +0200
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Subject: Re: [PATCH 1/2] efi: Disable runtime services on RT
To:     Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc:     linux-efi <linux-efi@vger.kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ard Biesheuvel <ard.biesheuvel@linaro.org>
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On Tue, 28 Sept 2021 at 15:33, Sebastian Andrzej Siewior
<bigeasy@linutronix.de> wrote:
>
> On 2021-09-28 15:30:32 [+0200], Ard Biesheuvel wrote:
> > This is generic code and the commit log only talks about arm64. How
> > about other architectures?
>
> They also invoke the EFI services with disables interrupts. If they
> provide a RTC behind spi/i2c then we end up in the same situation right?
> Or did I misunderstand your point?
>

Are you sure you want to disable EFI runtime services on all x86
systems with PREEMPT_RT as well?