From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Eric Camachat <eric.camachat@gmail.com>
Cc: xen-devel@lists.xensource.com
Subject: Re: Can I specify a physical memory region for a domU
Date: Thu, 8 Sep 2011 08:59:21 -0400 [thread overview]
Message-ID: <20110908125920.GC28591@dumpdata.com> (raw)
In-Reply-To: <CACeEFf6dh0AZ2Py2a3YWtGkQoHmVWMehFgz52tUBNJ80d+n7HQ@mail.gmail.com>
On Wed, Sep 07, 2011 at 05:47:46PM -0700, Eric Camachat wrote:
> Hi,
>
> I am porting our drivers to XEN's PV domU (with PV PCI passthrouth), I
Use the DMA API that Linux provides (I presume that is what you meant
by PV DomU), and use the dma_alloc_coherent to set your regions.
Also pass in 'iommu=soft' on your Linux command line to enable the
Xen SWIOTLB DMA system.
> have to allocate a memory block and tell the hardware to access it.
> But the hardware can address 32-bit only, so I want dedicate a region
> of memory that below 2GB for the domU only.
Uh, don't you mean 4GB? - 32bit is up to 4GB.
> How do that in XEN?
>
> Thanks,
> /Eric
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
next prev parent reply other threads:[~2011-09-08 12:59 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-08 0:47 Can I specify a physical memory region for a domU Eric Camachat
2011-09-08 8:50 ` Tim Deegan
2011-09-08 12:59 ` Konrad Rzeszutek Wilk [this message]
2011-09-08 17:22 ` Eric Camachat
2011-09-08 18:12 ` Konrad Rzeszutek Wilk
2011-09-08 18:56 ` Eric Camachat
2011-09-08 20:00 ` Konrad Rzeszutek Wilk
2011-09-09 0:15 ` Eric Camachat
2011-09-09 1:05 ` Konrad Rzeszutek Wilk
2011-09-09 16:10 ` Eric Camachat
2011-09-09 16:48 ` Eric Camachat
2011-09-09 18:06 ` Konrad Rzeszutek Wilk
2011-09-09 19:19 ` Eric Camachat
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