* Questions about PCI passthrough on Xen 4.0
@ 2011-04-06 10:36 Song Xiang
2011-04-06 12:36 ` Konrad Rzeszutek Wilk
0 siblings, 1 reply; 3+ messages in thread
From: Song Xiang @ 2011-04-06 10:36 UTC (permalink / raw)
To: xen-devel
I have set up Xen 4.0.0 on an AMD machine with 2*12core. (AMD
Opteron(tm) Processor 6168)
But when I try to use PCI passthrough to pass an NIC to my HVM, the
HVM can successfully seen the NIC, but it can not use it!!. (I have
enable the DMA virtualization option of the AMD chip)
And, the machine will announce a "Power cycle AC" error when I enable
the "DMA virtualization" in BIOS.
It there anything wrong with this kind of chip?
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Questions about PCI passthrough on Xen 4.0
2011-04-06 10:36 Questions about PCI passthrough on Xen 4.0 Song Xiang
@ 2011-04-06 12:36 ` Konrad Rzeszutek Wilk
2011-04-06 18:44 ` Wei Huang
0 siblings, 1 reply; 3+ messages in thread
From: Konrad Rzeszutek Wilk @ 2011-04-06 12:36 UTC (permalink / raw)
To: Song Xiang; +Cc: xen-devel
On Wed, Apr 06, 2011 at 11:36:42AM +0100, Song Xiang wrote:
> I have set up Xen 4.0.0 on an AMD machine with 2*12core. (AMD
> Opteron(tm) Processor 6168)
>
> But when I try to use PCI passthrough to pass an NIC to my HVM, the
> HVM can successfully seen the NIC, but it can not use it!!. (I have
> enable the DMA virtualization option of the AMD chip)
>
> And, the machine will announce a "Power cycle AC" error when I
> enable the "DMA virtualization" in BIOS.
Wait a minute. You enable the option in the BIOS and the machine
power cycles you? That sounds like the BIOS is busted.
>
> It there anything wrong with this kind of chip?
More like your BIOS.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Questions about PCI passthrough on Xen 4.0
2011-04-06 12:36 ` Konrad Rzeszutek Wilk
@ 2011-04-06 18:44 ` Wei Huang
0 siblings, 0 replies; 3+ messages in thread
From: Wei Huang @ 2011-04-06 18:44 UTC (permalink / raw)
To: Konrad Rzeszutek Wilk; +Cc: Song Xiang, xen-devel@lists.xensource.com
As indicated by Konrad, if enabling IOMMU in BIOS will cause power
cycle, it would be a BIOS bug then. Your description wasn't very clear.
If you saw NIC been passthru to VM, when did "power cycle" happen? Maybe
you can give us more details:
1. Machine vendor, BIOS vendor/version
2. Logs (xm dmesg after passthru)
Thanks,
-Wei
On 04/06/2011 07:36 AM, Konrad Rzeszutek Wilk wrote:
> On Wed, Apr 06, 2011 at 11:36:42AM +0100, Song Xiang wrote:
>> I have set up Xen 4.0.0 on an AMD machine with 2*12core. (AMD
>> Opteron(tm) Processor 6168)
>>
>> But when I try to use PCI passthrough to pass an NIC to my HVM, the
>> HVM can successfully seen the NIC, but it can not use it!!. (I have
>> enable the DMA virtualization option of the AMD chip)
>>
>> And, the machine will announce a "Power cycle AC" error when I
>> enable the "DMA virtualization" in BIOS.
> Wait a minute. You enable the option in the BIOS and the machine
> power cycles you? That sounds like the BIOS is busted.
>
>> It there anything wrong with this kind of chip?
> More like your BIOS.
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
>
^ permalink raw reply [flat|nested] 3+ messages in thread
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2011-04-06 12:36 ` Konrad Rzeszutek Wilk
2011-04-06 18:44 ` Wei Huang
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