Re: [Xen-users] Xen 3.2 and AMD IOMMU

[Age_M <Age_M@xxxxxx>]

Hello Stephan,

as far as I know, there is no IOMMU available yet [1]. I have an AMD X2 
3600+ CPU but IOMMU is disabled. My system uses swiotlb instead [2]. I 
searched a lot and all I could find is, that IOMMU will be available in 
2009. But I don't know if it is a CPU or Chipset feature!?
Greetz Holger

[1]
deedee ~ # xm dmesg |grep -i iommu
(XEN) AMD IOMMU: Disabled

[2]
deedee ~ # dmesg |grep -i swiotlb
PCI-DMA: Using software bounce buffering for IO (SWIOTLB)




Stephan Seitz schrieb:
> Hi there,
>
> my recent work with Xen has only been done on Intel Platforms. Here VT-d 
> feature has to be enabled via a
> vtd=1 entry at boot time.
> This weekend i've got access to some brandnew AMD powered machines, so 
> I'm going to try the IOMMU stuff.
> Does someone know if this feature is detected in Xen 3.2 by default or 
> are some settings / boot-options
> necessary to get pciback hardware redirection available to HVM guests?
>
> Thanks for any response!
>
> Cheers,
>
> Stephan
>
>
>
>
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