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From: Ashok Raj <ashok.raj@intel.com>
To: Andi Kleen <ak@suse.de>
Cc: Ashok Raj <ashok.raj@intel.com>,
	linux-kernel@vger.kernel.org, akpm@osdl.org, gregkh@suse.de,
	muli@il.ibm.com, asit.k.mallick@intel.com,
	suresh.b.siddha@intel.com, anil.s.keshavamurthy@intel.com,
	arjan@linux.intel.com, shaohua.li@intel.com,
	keith.packard@intel.com
Subject: Re: [patch 0/8] [Intel IOMMU] Support for Intel Virtualization Technology for Directed I/O
Date: Tue, 10 Apr 2007 09:31:33 -0700	[thread overview]
Message-ID: <20070410163132.GC31505@linux-os.sc.intel.com> (raw)
In-Reply-To: <200704100949.56130.ak@suse.de>

On Tue, Apr 10, 2007 at 09:49:55AM +0200, Andi Kleen wrote:
> On Monday 09 April 2007 23:55:52 Ashok Raj wrote:
> 
> > Please help review and provide feedback.
> 
> High level question: how did you solve the "user X server needs IOMMU bypass"
> problem?

There is no special consideration for user space. Since all useful memeory is 
mapped 1-1, guess user space would work as is. Unless iam missing something 
here.. so yes.. there is no protection with 1-1, but guess its like 
compatibility mode until the code gets converted over.

Keith: cced says some of the user space side also is getting converted over with
some driver support possibly. So this is an interim problem until X catches up
with it.
> 
> -Andi

  parent reply	other threads:[~2007-04-10 16:32 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-04-09 21:55 [patch 0/8] [Intel IOMMU] Support for Intel Virtualization Technology for Directed I/O Ashok Raj
2007-04-09 21:55 ` [patch 1/8] [Intel IOMMU] ACPI support " Ashok Raj
2007-04-10  3:39   ` Len Brown
2007-04-10 16:26     ` Ashok Raj
2007-04-09 21:55 ` [patch 2/8] [Intel IOMMU] Some generic search functions required to lookup device relationships Ashok Raj
2007-04-10  3:46   ` Greg KH
2007-04-10  8:11     ` Shaohua Li
2007-04-10 13:03       ` Greg KH
2007-04-11  1:40         ` Shaohua Li
2007-04-11  4:36           ` Greg KH
2007-04-11  6:10         ` Shaohua Li
2007-04-09 21:55 ` [patch 3/8] [Intel IOMMU] Generic hardware support for Intel IOMMU Ashok Raj
2007-04-09 21:55 ` [patch 4/8] [Intel IOMMU] Supporting Zero Length Reads in " Ashok Raj
2007-04-09 21:55 ` [patch 5/8] [Intel IOMMU] Graphics driver workarounds to provide unity map Ashok Raj
2007-04-10  8:33   ` Christoph Hellwig
2007-04-10  9:07     ` David Miller
2007-04-10  9:12       ` Andi Kleen
2007-04-11  2:40         ` Wang Zhenyu
2007-04-10 16:29       ` Arjan van de Ven
2007-04-09 21:55 ` [patch 6/8] [Intel IOMMU] Doc updates for Intel Virtualization Technology for Directed I/O Ashok Raj
2007-04-09 21:55 ` [patch 7/8] [Intel IOMMU] Support for legacy ISA devices Ashok Raj
2007-04-09 21:56 ` [patch 8/8] [Intel IOMMU] Preserve some Virtual Address when devices cannot address entire range Ashok Raj
2007-04-10  7:49 ` [patch 0/8] [Intel IOMMU] Support for Intel Virtualization Technology for Directed I/O Andi Kleen
2007-04-10  7:57   ` Shaohua Li
2007-04-10  8:09     ` Muli Ben-Yehuda
2007-04-10  8:20       ` Shaohua Li
2007-04-10 16:31   ` Ashok Raj [this message]
2007-04-10  8:21 ` Jeff Garzik
2007-04-10  8:27   ` Shaohua Li
2007-04-10  8:34     ` Jeff Garzik
2007-04-10 16:43       ` Ashok Raj

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