From: "Mike D. Day" <ncmike@us.ibm.com>
To: Anthony Liguori <aliguori@us.ibm.com>
Cc: Arjan van de Ven <arjan@infradead.org>, Greg KH <greg@kroah.com>,
Gerd Hoffmann <kraxel@suse.de>,
lkml <linux-kernel@vger.kernel.org>,
xen-devel@lists.xensource.com
Subject: Re: [RFC] [PATCH] sysfs support for Xen attributes
Date: Thu, 12 Jan 2006 14:11:10 -0500 [thread overview]
Message-ID: <43C6A9CE.9080105@us.ibm.com> (raw)
In-Reply-To: <43C6A70D.8010902@us.ibm.com>
Anthony Liguori wrote:
> Arjan van de Ven wrote:
>
>> On Thu, 2006-01-12 at 12:53 -0600, Anthony Liguori wrote:
>>
>>
>>> We wish to make management hypercalls as the root user in userspace
>>> which means we have to go through the kernel. Currently, we do this
>>> by having /proc/xen/privcmd accept an ioctl() that takes a structure
>>> that describe the register arguments. The kernel interface allows us
>>> to control who in userspace can execute hypercalls.
>>>
>>
>> ioctls on proc is evil though (so is ioctl-on-sysfs). It's a device not
>> a proc file!
>>
>>
> I full heartedly agree with you :-)
What about making hypercalls via with a read/write interface into memory
mapped by a char device? Any problems with that approach?
Mike
--
Mike D. Day
STSM and Architect, Open Virtualization
IBM Linux Technology Center
ncmike@us.ibm.com
next prev parent reply other threads:[~2006-01-12 19:11 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-11 17:17 [RFC] [PATCH] sysfs support for Xen attributes Mike D. Day
2006-01-11 17:19 ` Arjan van de Ven
2006-01-11 17:56 ` Stephen Hemminger
2006-01-11 18:45 ` Dave Hansen
2006-01-11 23:07 ` Greg KH
2006-01-12 0:23 ` Mike D. Day
2006-01-12 0:57 ` Greg KH
2006-01-12 1:49 ` Mike D. Day
2006-01-12 2:17 ` [Xen-devel] " Mark Williamson
2006-01-12 7:10 ` Greg KH
2006-01-12 14:44 ` [Xen-devel] " Mike D. Day
2006-01-12 14:53 ` Mark Williamson
2006-01-12 15:42 ` Anthony Liguori
2006-01-12 15:57 ` Anthony Liguori
2006-01-12 17:34 ` Greg KH
2006-01-12 18:44 ` Anthony Liguori
2006-01-12 17:43 ` Greg KH
2006-01-12 9:10 ` Dave Hansen
2006-01-12 14:52 ` [Xen-devel] " Mike D. Day
2006-01-12 15:28 ` Dave Hansen
2006-01-12 15:50 ` Mike D. Day
2006-01-12 12:54 ` Gerd Hoffmann
2006-01-12 13:21 ` Arjan van de Ven
2006-01-12 14:42 ` Gerd Hoffmann
2006-01-12 17:39 ` Greg KH
2006-01-12 18:53 ` Anthony Liguori
2006-01-12 18:55 ` Arjan van de Ven
2006-01-12 18:59 ` Anthony Liguori
2006-01-12 19:11 ` Mike D. Day [this message]
2006-01-12 19:31 ` Greg KH
2006-01-12 19:08 ` Greg KH
2006-01-12 19:18 ` Mike D. Day
2006-01-12 19:30 ` Greg KH
2006-01-12 17:38 ` Greg KH
2006-01-12 1:32 ` Dave Hansen
2006-01-12 10:04 ` [Xen-devel] " Keir Fraser
2006-01-12 15:14 ` Dave Hansen
2006-01-12 15:06 ` Mark Williamson
2006-01-12 15:26 ` Keir Fraser
2006-01-12 15:37 ` Dave Hansen
2006-01-12 15:49 ` Anthony Liguori
2006-01-11 23:31 ` Pavel Machek
2006-01-12 19:01 ` Greg KH
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