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From: Jiang Liu <jiang.liu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
To: chenfeng <puck.chen-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org>,
	joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org,
	iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	rcallicotte-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
	robin.murphy-5wv7dgnIgG8@public.gmane.org
Cc: Dan zhao <dan.zhao-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org>,
	"Wangfei (William,
	Euler)" <w.f-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>,
	Suzhuangluan
	<suzhuangluan-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org>,
	qijiwen <qijiwen-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org>,
	Peter Panshilin
	<peter.panshilin-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org>
Subject: Re: How to ensure that different peripherals getting different IOVA address in kernel?
Date: Wed, 23 Sep 2015 10:42:14 +0800	[thread overview]
Message-ID: <56021186.4010500@linux.intel.com> (raw)
In-Reply-To: <560206AE.4020608-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org>

On 2015/9/23 9:55, chenfeng wrote:
> Hi all,
> 
> In IOMMU architecture , how to make two different peripherals share the same page table ?
> 
> In other words , is there a mechanism or structure to make two peripherals get completely different address.
> 
> eg:
> 
> peri-A、peri-B and peri-C share the same iova address 0-1G for some performance requests.
> 
> So the A,B,C need to use the same IOVA generator to ensure this,but I don't find an architecture to make this.
> 
> Any help will be appreciated.
Hi Chenfeng,
	Seems IOMMU group may help you, please take a look at
Documentation/vfio.txt.
Thanks!
Gerry
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

WARNING: multiple messages have this Message-ID (diff)
From: Jiang Liu <jiang.liu@linux.intel.com>
To: chenfeng <puck.chen@hisilicon.com>,
	joro@8bytes.org, iommu@lists.linux-foundation.org,
	linux-kernel@vger.kernel.org, rcallicotte@gmail.com,
	robin.murphy@arm.com
Cc: Dan zhao <dan.zhao@hisilicon.com>,
	qijiwen <qijiwen@hisilicon.com>,
	Peter Panshilin <peter.panshilin@hisilicon.com>,
	Suzhuangluan <suzhuangluan@hisilicon.com>,
	Yiping Xu <xuyiping@hisilicon.com>,
	"Wangfei (William, Euler)" <w.f@huawei.com>
Subject: Re: How to ensure that different peripherals getting different IOVA address in kernel?
Date: Wed, 23 Sep 2015 10:42:14 +0800	[thread overview]
Message-ID: <56021186.4010500@linux.intel.com> (raw)
In-Reply-To: <560206AE.4020608@hisilicon.com>

On 2015/9/23 9:55, chenfeng wrote:
> Hi all,
> 
> In IOMMU architecture , how to make two different peripherals share the same page table ?
> 
> In other words , is there a mechanism or structure to make two peripherals get completely different address.
> 
> eg:
> 
> peri-A、peri-B and peri-C share the same iova address 0-1G for some performance requests.
> 
> So the A,B,C need to use the same IOVA generator to ensure this,but I don't find an architecture to make this.
> 
> Any help will be appreciated.
Hi Chenfeng,
	Seems IOMMU group may help you, please take a look at
Documentation/vfio.txt.
Thanks!
Gerry

  parent reply	other threads:[~2015-09-23  2:42 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <5600AF72.2000106@hisilicon.com>
2015-09-23  1:55 ` How to ensure that different peripherals getting different IOVA address in kernel? chenfeng
2015-09-23  1:55   ` chenfeng
     [not found]   ` <560206AE.4020608-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org>
2015-09-23  2:42     ` Jiang Liu [this message]
2015-09-23  2:42       ` Jiang Liu
2015-09-23 12:08     ` Robin Murphy
2015-09-23 12:08       ` Robin Murphy

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