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
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next prev parent reply other threads:[~2015-09-23 2:42 UTC|newest]
Thread overview: 3+ 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
[not found] ` <560206AE.4020608-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org>
2015-09-23 2:42 ` Jiang Liu [this message]
2015-09-23 12:08 ` Robin Murphy
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