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<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Hi, Yang, Yi y<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Agree with you, </span><span lang="EN-US">IOMMU and SR-IOV</span><span lang="EN-US" style="color:#1F497D"> need to be checked beforehand.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">I think it should be checked before booting a instance with the pci flavor, that means when the flavor contains some normal pci cards or SR-IOV cards. Just like when you find there are pci_requests
in the instance system_metadata.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">The details are out of my current knows.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Hope can help you.<o:p></o:p></span></p>
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<p class="MsoNormal" align="left" style="text-align:left"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Yang, Yi Y [mailto:yi.y.yang@intel.com]
<br>
<b>Sent:</b> Wednesday, March 26, 2014 10:51 AM<br>
<b>To:</b> openstack-dev@lists.openstack.org<br>
<b>Subject:</b> [openstack-dev] SR-IOV and IOMMU check<o:p></o:p></span></p>
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<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Hi, all<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Currently openstack can support SR-IOV device pass-through (at least there are some patches for this), but the prerequisite to this is both IOMMU and SR-IOV must be enabled correctly, it seems there is not a robust way
to check this in openstack, I have implemented a way to do this and hope it can be committed into upstream, this can help find the issue beforehand, instead of letting kvm report the issue “no IOMMU found” until the VM is started. I didn’t find an appropriate
place to put into this, do you think this is necessary? Where can it be put into? Welcome your advice and thank you in advance.<o:p></o:p></span></p>
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