From: "H. Peter Anvin" <hpa@zytor.com>
To: Andi Kleen <ak@novell.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
Thomas Gleixner <tglx@linutronix.de>,
"Huang, Ying" <ying.huang@intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@redhat.com>,
Chandramouli Narayanan <mouli@linux.intel.com>,
LKML <linux-kernel@vger.kernel.org>,
Arjan van de Ven <arjan@infradead.org>
Subject: Re: [PATCH 1/3 -v4] x86_64 EFI runtime service support: EFI basic runtime service support
Date: Thu, 25 Oct 2007 10:08:16 -0700 [thread overview]
Message-ID: <4720CD80.5030106@zytor.com> (raw)
In-Reply-To: <200710251906.10210.ak@novell.com>
Andi Kleen wrote:
>> Especially for accessing the real time clock that has a well
>> defined hardware interface going through efi an additional
>> software emulation layer looks like asking for trouble.
>
> I agree it's pointless for the hardware clock, but EFI
> also offers services to write some data to the CMOS RAM
> which could be very useful to save oops data over reboot.
> I don't think this can be done safely otherwise
> without BIOS cooperation.
>
The ability to scurry away even a small amount of data without relying
on the disk system is highly desirable. Think next-boot type information.
-hpa
next prev parent reply other threads:[~2007-10-25 17:12 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-25 6:57 [PATCH 1/3 -v4] x86_64 EFI runtime service support: EFI basic runtime service support Huang, Ying
2007-10-25 16:09 ` Thomas Gleixner
2007-10-25 16:28 ` H. Peter Anvin
2007-10-25 16:55 ` Eric W. Biederman
2007-10-25 16:56 ` Arjan van de Ven
2007-10-25 17:05 ` H. Peter Anvin
2007-10-25 17:39 ` Eric W. Biederman
2007-10-25 17:51 ` H. Peter Anvin
2007-10-25 18:04 ` Eric W. Biederman
2007-10-25 20:36 ` H. Peter Anvin
2007-10-25 22:20 ` Eric W. Biederman
2007-10-25 22:29 ` H. Peter Anvin
2007-10-26 2:31 ` Huang, Ying
2007-10-26 2:14 ` Huang, Ying
2007-10-25 17:06 ` Eric W. Biederman
2007-10-26 1:28 ` Huang, Ying
2007-10-25 17:06 ` Andi Kleen
2007-10-25 17:08 ` H. Peter Anvin [this message]
2007-10-25 17:30 ` Eric W. Biederman
2007-10-26 2:12 ` Huang, Ying
2007-10-26 1:03 ` Huang, Ying
2007-10-26 8:48 ` Thomas Gleixner
2007-10-26 9:30 ` Huang, Ying
2007-10-26 10:20 ` Thomas Gleixner
2007-10-26 11:37 ` Andi Kleen
2007-10-26 11:31 ` Alan Cox
2007-10-26 17:00 ` H. Peter Anvin
2007-10-29 1:05 ` Huang, Ying
2007-10-26 3:36 ` Huang, Ying
2007-10-26 4:11 ` H. Peter Anvin
2007-10-25 17:01 ` Eric W. Biederman
2007-10-26 1:17 ` Huang, Ying
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