WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] RE: [pvops xen/next ][iommu] attenpt to passthrough PCI-

To: "Han, Weidong" <weidong.han@xxxxxxxxx>
Subject: Re: [Xen-devel] RE: [pvops xen/next ][iommu] attenpt to passthrough PCI-e usb controllor to PV domU: (XEN) traps.c:2309:d1 Domain attempted WRMSR 000000000000008b from 00000a07:00000000 to 00000000:00000000.
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Mon, 22 Mar 2010 11:04:50 +0200
Cc: Sander Eikelenboom <linux@xxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Delivery-date: Mon, 22 Mar 2010 02:05:23 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <1A42CE6F5F474C41B63392A5F80372B21D641D6D@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <1017192770.20100321221949@xxxxxxxxxxxxxx> <1A42CE6F5F474C41B63392A5F80372B21D641D6D@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Mutt/1.5.18 (2008-05-17)
On Mon, Mar 22, 2010 at 04:04:09PM +0800, Han, Weidong wrote:
> The faults were caused by that the DMA address was not mapped in VT-d page 
> table.
> 
> Could you have following two tries:
>       1) assign it to pv domU without VT-d

Btw are there other methods of disabling VT-d PCI passhtru than having 
iommu=off for xen.gz in grub.conf? 
ie. can you somehow select "use normal PV passthru for this guest" and "but 
still use VT-d passthru for this guest" ?

ps. I'm just writing a xen wiki page for PCI passthru and adding these things 
and the common failure scenarios there.

-- Pasi

>       2) assign it to a hvm guest
> 
> Regards,
> Weidong
> 
> -----Original Message-----
> From: Sander Eikelenboom [mailto:linux@xxxxxxxxxxxxxx] 
> Sent: Monday, March 22, 2010 5:20 AM
> To: Konrad Rzeszutek Wilk
> Cc: Han, Weidong; xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: [pvops xen/next ][iommu] attenpt to passthrough PCI-e usb controllor 
> to PV domU: (XEN) traps.c:2309:d1 Domain attempted WRMSR 000000000000008b 
> from 00000a07:00000000 to 00000000:00000000.
> 
> Hi Han/Konrad,
> 
> In my setup i'm trying to passthrough an USB 3.0 pci-e controller  to a PV 
> domU.
> - xen: 4.0.0-rc6
> - dom0: kernel xen/next
> - domU: kernel 2.6.33 from 
> git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git
>         ( to have pci-front together with most recent usb3.0 xhci drivers.
> 
> 
> - USB 3.0 xhci drivers work fine on the baremetal with the 2.6.33 kernel.
> 
> This is on a intel Q45 chipset with IOMMU.
> 
> This is my boot config:
> title           xen-4.0.0-rc6.gz / Debian GNU/Linux,  kernel 2.6.32
> root            (hd0,0)
> kernel          /boot/xen-4.0.0-rc6.gz dom0_mem=768M loglvl=all 
> loglvl_guest=all  iommu=pv iommu_inclusive_mapping=1
> module          /boot/vmlinuz-2.6.32 root=/dev/sda1 ro earlyprintk=xen 
> max_loop=255 xen-pciback.hide=(03:00.0)
> module          /boot/initrd.img-2.6.32
> 
> When booting the domU xm dmesg gets filled with the following when the usb 
> controller tries to initialize/:
> 
> (XEN) traps.c:2309:d1 Domain attempted WRMSR 000000000000008b from 
> 00000a07:00000000 to 00000000:00000000.
> (XEN) [VT-D]iommu.c:821: iommu_fault_status: Primary Pending Fault
> (XEN) [VT-D]iommu.c:796: DMAR:[DMA Read] Request device [03:00.0] fault addr 
> 1ff94000, iommu reg = ffff82c3fff54000
> (XEN) DMAR:[fault reason 06h] PTE Read access is not set
> (XEN) print_vtd_entries: iommu = ffff83007c866970 bdf = 3:0.0 gmfn = 1ff94
> (XEN)     root_entry = ffff83007c872000
> (XEN)     root_entry[3] = 78f56001
> (XEN)     context = ffff830078f56000
> (XEN)     context[0] = 101_2f0e1001
> (XEN)     l3 = ffff83002f0e1000
> (XEN)     l3_index = 0
> (XEN)     l3[0] = 2f0e0003
> (XEN)     l2 = ffff83002f0e0000
> (XEN)     l2_index = ff
> (XEN)     l2[ff] = 0
> (XEN)     l2[ff] not present
> 
> 
> 
> Anyone any tips on what i could try ?, is this something caused by xen, or 
> something by the usb driver not adhering to kernel DMA-api ?
> 
> Attached:
> 
> - xm-info.txt
> - xm-dmesg.txt
> - xend.log
> 
> - dom0-dmesg.txt
> - dom0-lspci-tree.txt
> - dom0-lspci.txt
> 
> - domU-lspci.txt
> - domU-dmesg.txt
> 
> 
> 
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

<Prev in Thread] Current Thread [Next in Thread>