From: Ingo Molnar <mingo@kernel.org>
To: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: "Prakhya, Sai Praneeth" <sai.praneeth.prakhya@intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Daniel Drake <drake@endlessm.com>,
Peter Zijlstra <peterz@infradead.org>,
Borislav Petkov <bp@alien8.de>,
Thomas Gleixner <tglx@linutronix.de>,
Linux Kernel <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Jian-Hong Pan <jian-hong@endlessm.com>,
Matt Fleming <matt@codeblueprint.co.uk>,
linux-efi <linux-efi@vger.kernel.org>,
"Brown, Len" <len.brown@intel.com>,
"linux-tip-commits@vger.kernel.org"
<linux-tip-commits@vger.kernel.org>,
Endless Linux Upstreaming Team <linux@endlessm.com>
Subject: Re: EFI reboot vs. ACPI reboot (was: Re: [tip:x86/urgent] x86/reboot, efi: Use EFI reboot for Acer TravelMate X514-51T)
Date: Wed, 17 Apr 2019 21:17:02 +0200 [thread overview]
Message-ID: <20190417191702.GA29062@gmail.com> (raw)
In-Reply-To: <CAKv+Gu9NJH02obRtgtNf7O7Bd8Z0SdKjsBLppGd60f6ryq6OoA@mail.gmail.com>
* Ard Biesheuvel <ard.biesheuvel@linaro.org> wrote:
> On Wed, 17 Apr 2019 at 11:23, Ingo Molnar <mingo@kernel.org> wrote:
> >
> >
> > * Prakhya, Sai Praneeth <sai.praneeth.prakhya@intel.com> wrote:
> >
> > > I will ask around internally to check if it is a good idea to make EFI
> > > reboot the default method when the machine is booted in EFI mode.
> >
> > Or whether there's some robust signature that indicates "modern EFI
> > system where EFI reboot is the primary method"?
> >
> > Major EFI version or ACPI version or such?
> >
>
> I am actually at Microsoft right now, and I managed to get
> clarification on how Windows deals with this: Windows will attempt to
> use ACPI reboot first, and will only attempt to use anything else if
> that fails. EFI reset is actually its least preferred option, and so
> it is highly likely that it is untested on most of the shipping x86
> hardware if any of the other methods work.
>
> So let's not touch this.
Agreed and that's really useful information, thanks!
Ingo
next prev parent reply other threads:[~2019-04-17 19:17 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-12 8:01 [PATCH v2] x86/reboot: Use efi reboot for Acer TravelMate X514-51T Jian-Hong Pan
2019-04-16 7:52 ` [tip:x86/urgent] x86/reboot: Use EFI " tip-bot for Jian-Hong Pan
2019-04-16 8:07 ` [tip:x86/urgent] x86/reboot, efi: " tip-bot for Jian-Hong Pan
2019-04-16 8:20 ` EFI reboot vs. ACPI reboot (was: Re: [tip:x86/urgent] x86/reboot, efi: Use EFI reboot for Acer TravelMate X514-51T) Ingo Molnar
2019-04-16 11:35 ` Daniel Drake
2019-04-17 6:16 ` Ingo Molnar
2019-04-17 12:38 ` Daniel Drake
2019-04-17 15:15 ` hpa
2019-04-17 15:45 ` Ard Biesheuvel
2019-04-17 17:22 ` Prakhya, Sai Praneeth
2019-04-17 18:23 ` Ingo Molnar
2019-04-17 19:07 ` Ard Biesheuvel
2019-04-17 19:17 ` Ingo Molnar [this message]
2019-04-17 16:37 ` Ingo Molnar
2019-04-17 16:51 ` hpa
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