Re: PCIe device pass-through - No IOMMU, Failed to deassign device error

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2010/1/26 Chris Wright <chrisw@xxxxxxxxxxxx>:
>
> Again, VT (or VT-x) isn't the same as VT-d.  So to be sure, you can
> grep dmesg for DMAR and IOMMU to verify that the chipset actually has
> VT-d support, that it's enabled, and that it's not broken (there are
> quite a few broken BIOS out there that case the IOMMU to be unusable).

dmesg | egrep (DMAR|IOMMU)
This information should _really_ be added to the wiki at
http://www.linux-kvm.org/page/How_to_assign_devices_with_VT-d_in_KVM

Knowing this, it's quite easy for a user to determine if his system
has VT-d support, _before_ following the guide, compiling own kernel,
setting up qemu-kvm, unbinding and rebinding PCI devices, just to have
qemu-kvm 0.12.2 tell him that the system has no IOMMU (much better
than 0.12.1, agreed, but it's a bit late in the process to find out
:))

Can someone with write permissions to the wiki please add this?

Best Regards
Kenni Lund
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