Re: [Xen-users] SR-IOV

[Achala Aryal <arya2595@xxxxxxxxxxxxxxxxxx>]

Thank you for the link and clearification. 

One more thing Is there a command to see memory address of guest domain? 
And also any command that shows unauthorized access to memory if try to access 
memory of different domain? 

I only want is to proof isolation of vm with the use of vt-d. Any idea?

Btw I successfully passthrough both pci and pcie device to guest domain.

Thank you

On Nov 26, 2011, at 11:07 PM, "Liwei" <xieliwei@xxxxxxxxx> wrote:

> On 27 November 2011 10:23, Achala Aryal <arya2595@xxxxxxxxxxxxxxxxxx> wrote:
>> what is virtual slot things then?
> 
> I'm assuming that you're referring to this:
> http://wiki.xen.org/xenwiki/VTdHowTo#line-199
> 
> Recall that PCI passthrough is basically assigning a physical PCI card
> to a virtual machine. Within the VM are virtual slots, virtual
> counterparts of the physical PCI slots you plug your cards into. So
> when you assign a PCI device to a virtual slot, its like slotting the
> physical PCI card into the VM's virtual PCI slot.
> 
> See Slide 24 - 29 of
> http://www.valinux.co.jp/documents/tech/presentlib/2009/jls/multi-function_a.pdf
> for some nice graphical representations (although the graphics refer
> to virtual functions, the idea is very similar).
> 
>> 
>> and also lets say,
>> I have pci NIC in dom0 and  two different PCIe device and are assigned it
>> directly to two different VMs.
>> 
>> 
>> is there any communication problem between them? like PCI to PCIe device?
>> 
> 
> In general, there should be no problems, except for some device and
> BIOS quirks. For lower level considerations like overheads and fringe
> scenarios, you'll have to ask the xen devs.
> 
> One thing to note is that, it is likely your PCI slots are provided by
> a PCIe-to-PCI bridge. If that is so, last I heard, all PCI devices
> behind the same bridge must be assigned to the same domain:
> 
> http://www.ibm.com/developerworks/linux/library/l-pci-passthrough/#hypervisor_support
> 
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