Open Stack

----- Original Message -----
> This is the approach mentioned by linux-kvm.org
> 
> http://www.linux-kvm.org/page/How_to_assign_devices_with_VT-d_in_KVM
> 
> 3. reboot and verify that your system has IOMMU support
> 
> AMD Machine
> dmesg | grep AMD-Vi
>      ...
>      AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x40
>      AMD-Vi: Lazy IO/TLB flushing enabled
>      AMD-Vi: Initialized for Passthrough Mode
>      ...
> Intel Machine
> dmesg | grep -e DMAR -e IOMMU
>      ...
>      DMAR:DRHD base: 0x000000feb03000 flags: 0x0
>      IOMMU feb03000: ver 1:0 cap c9008020e30260 ecap 1000
>      ...

Right, but the question is whether grepping dmesg is an acceptable/stable API to be relying on from the Nova level. Basically what I'm saying is the reason there isn't a robust way to check this from OpenStack is that there doesn't appear to be a robust way to check this from the kernel?

Steve