From: "Theodore Ts'o" <tytso@mit.edu>
To: Alex Williamson <alex.williamson@hp.com>
Cc: "Yu, Luming" <luming.yu@intel.com>,
Dmitry Torokhov <dtor_core@ameritech.net>,
acpi-devel@lists.sourceforge.net, "Keshavamurthy,
Anil S" <anil.s.keshavamurthy@intel.com>,
"Brown, Len" <len.brown@intel.com>,
LHNS list <lhns-devel@lists.sourceforge.net>,
Linux IA64 <linux-ia64@vger.kernel.org>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [ACPI] PATCH-ACPI based CPU hotplug[2/6]-ACPI Eject interfacesupport
Date: Tue, 21 Sep 2004 17:25:46 +0000 [thread overview]
Message-ID: <20040921172546.GA7077@thunk.org> (raw)
In-Reply-To: <1095735738.3920.29.camel@mythbox>
On Mon, Sep 20, 2004 at 09:02:18PM -0600, Alex Williamson wrote:
> > But, some AML methods are risky to be called directly from user space,
> > Not only because the side effect of its execution, but also because
> > it could trigger potential AML method bug or interpreter bug, or even
> > architectural defect. All of these headache is due to the AML method
> > is NOT intended for being used by userspace program.
>
> I've made an attempt to hide the most obvious dangerous methods, but
> undoubtedly, there will be some. Why are we any more likely to hit an
> AML method bug, interpreter bug or architectural bug by having a
> userspace interface?
As long as the userspace interfaces are only available to the root
filesystem, I'm not sure it's worth it to hide any of the methods.
It's added complexity, and in any case, root can do untold amounts of
damage by writing to /dev/mem, trying to upload firmware to IDE
drives, etc., etc., etc.
As you have pointed out, if there are bugs in the interpret, et. al,
it is better to expose them sooner rather than to stick our heads in
the sand and pretend they don't exist.
- Ted
next prev parent reply other threads:[~2004-09-21 17:25 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-20 16:25 PATCH-ACPI based CPU hotplug[0/6] Keshavamurthy Anil S
2004-09-20 16:29 ` PATCH-ACPI based CPU hotplug[0/6]-Core ACPI enhancement support Keshavamurthy Anil S
2004-09-20 16:34 ` PATCH-ACPI based CPU hotplug[1/6]-ACPI core " Keshavamurthy Anil S
[not found] ` <200409201326.44946.dtor_core@ameritech.net>
2004-09-20 19:01 ` [ACPI] " Keshavamurthy Anil S
2004-09-20 20:26 ` Bjorn Helgaas
2004-09-20 20:44 ` Keshavamurthy Anil S
2004-09-24 23:22 ` Keshavamurthy Anil S
2004-09-20 16:35 ` PATCH-ACPI based CPU hotplug[2/6]-ACPI Eject interface support Keshavamurthy Anil S
2004-09-20 18:33 ` [ACPI] " Dmitry Torokhov
2004-09-20 19:24 ` Keshavamurthy Anil S
2004-09-20 23:12 ` Dmitry Torokhov
2004-09-21 0:52 ` [ACPI] PATCH-ACPI based CPU hotplug[2/6]-ACPI Eject interface Alex Williamson
2004-09-21 1:20 ` [ACPI] PATCH-ACPI based CPU hotplug[2/6]-ACPI Eject interface support Dmitry Torokhov
2004-09-21 1:25 ` Keshavamurthy Anil S
2004-09-21 1:41 ` [ACPI] PATCH-ACPI based CPU hotplug[2/6]-ACPI Eject interface Alex Williamson
2004-09-21 5:34 ` [ACPI] PATCH-ACPI based CPU hotplug[2/6]-ACPI Eject interface support Dmitry Torokhov
2004-09-21 1:38 ` Keshavamurthy Anil S
2004-09-21 5:51 ` Dmitry Torokhov
2004-09-21 21:51 ` Keshavamurthy Anil S
2004-09-21 22:23 ` [Lhns-devel] " Russ Anderson
2004-09-22 3:10 ` Dmitry Torokhov
2004-09-24 23:28 ` Keshavamurthy Anil S
2004-09-27 6:12 ` Dmitry Torokhov
2004-09-27 16:53 ` Keshavamurthy Anil S
2004-09-27 18:09 ` Dmitry Torokhov
2004-09-21 2:30 ` [ACPI] PATCH-ACPI based CPU hotplug[2/6]-ACPI Eject interfacesupport Yu, Luming
2004-09-21 3:02 ` [ACPI] PATCH-ACPI based CPU hotplug[2/6]-ACPI Eject Alex Williamson
2004-09-21 17:25 ` Theodore Ts'o [this message]
2004-09-21 18:10 ` Alex Williamson
2004-09-22 4:17 ` [ACPI] PATCH-ACPI based CPU hotplug[2/6]-ACPI Eject interface Keiichiro Tokunaga
2004-09-22 16:59 ` [ACPI] PATCH-ACPI based CPU hotplug[2/6]-ACPI Eject interface support Keshavamurthy Anil S
[not found] ` <20040920092520.A14208-39QZ/XbsZ5/mO6KZMuUCQVaTQe2KTcn/@public.gmane.org>
2004-09-20 16:38 ` PATCH-ACPI based CPU hotplug[3/6]-Mapping lsapic to cpu Keshavamurthy Anil S
2004-09-22 2:10 ` [ACPI] " Keiichiro Tokunaga
2004-09-23 6:55 ` Keshavamurthy Anil S
2004-09-22 13:15 ` Keiichiro Tokunaga
2004-09-22 13:23 ` Keiichiro Tokunaga
2004-09-22 14:52 ` Alex Williamson
2004-09-22 17:10 ` Keiichiro Tokunaga
2004-09-22 17:54 ` Keshavamurthy Anil S
2004-09-24 23:36 ` Keshavamurthy Anil S
2004-09-27 11:47 ` Keiichiro Tokunaga
2004-09-27 12:50 ` Keiichiro Tokunaga
2004-09-27 20:44 ` Keshavamurthy Anil S
2004-09-20 16:41 ` PATCH-ACPI based CPU hotplug[4/6]-Dynamic cpu register/unregister support Keshavamurthy Anil S
2004-09-22 8:34 ` [ACPI] PATCH-ACPI based CPU hotplug[4/6]-Dynamic cpu Keiichiro Tokunaga
2004-09-22 17:10 ` [ACPI] PATCH-ACPI based CPU hotplug[4/6]-Dynamic cpu register/unregister support Keshavamurthy Anil S
[not found] ` <20040922173400.4e717946.tokunaga.keiich-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
2004-09-24 23:40 ` Keshavamurthy Anil S
2004-09-20 16:43 ` PATCH-ACPI based CPU hotplug[5/6]-ACPI processor driver extension Keshavamurthy Anil S
2004-09-22 9:57 ` [ACPI] PATCH-ACPI based CPU hotplug[5/6]-ACPI processor driver Keiichiro Tokunaga
[not found] ` <20040920094352.G14208-39QZ/XbsZ5/mO6KZMuUCQVaTQe2KTcn/@public.gmane.org>
2004-09-24 23:48 ` PATCH-ACPI based CPU hotplug[5/6]-ACPI processor driver extension Keshavamurthy Anil S
2004-09-20 16:47 ` PATCH-ACPI based CPU hotplug[6/6]-ACPI Container driver Keshavamurthy Anil S
2004-09-23 16:23 ` [PATCH][0/4] NUMA node handling support for ACPI container driver Keiichiro Tokunaga
2004-09-23 16:31 ` [PATCH][1/4] Add unregister_node() to drivers/base/node.c Keiichiro Tokunaga
2004-09-23 16:43 ` [Lhns-devel] [PATCH][1/4] Add unregister_node() to Dave Hansen
2004-09-24 3:12 ` Keiichiro Tokunaga
2004-09-27 18:52 ` [PATCH][1/4] Add unregister_node() to drivers/base/node.c Keshavamurthy Anil S
2004-09-28 10:19 ` Keiichiro Tokunaga
2004-09-23 16:32 ` [PATCH][2/4] Add arch_register_node() for ia64 Keiichiro Tokunaga
2004-09-23 16:32 ` [PATCH][3/4] Add hotplug support to drivers/acpi/numa.c Keiichiro Tokunaga
2004-09-27 12:58 ` Keiichiro Tokunaga
2004-09-27 20:06 ` Keshavamurthy Anil S
2004-09-29 6:26 ` Keiichiro Tokunaga
2004-09-23 16:36 ` [PATCH][4/4] Add NUMA node handling to the container driver Keiichiro Tokunaga
[not found] ` <20040924013642.00003b08.tokunaga.keiich-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
2004-09-23 22:09 ` Mika Penttilä
2004-09-24 4:44 ` Keiichiro Tokunaga
2004-09-23 16:38 ` [PATCH][0/4] NUMA node handling support for ACPI " Keshavamurthy Anil S
2004-09-24 23:51 ` PATCH-ACPI based CPU hotplug[6/6]-ACPI Container driver Keshavamurthy Anil S
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