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Re: [Qemu-discuss] IOMMU in kernel command line, still getting "No IOMMU
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From: |
Fam Zheng |
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Subject: |
Re: [Qemu-discuss] IOMMU in kernel command line, still getting "No IOMMU found. Unable to assign device "(null)"I |
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Date: |
Thu, 12 Jan 2017 16:00:46 +0800 |
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User-agent: |
Mutt/1.7.1 (2016-10-04) |
On Thu, 01/12 08:21, Kevin Wilson wrote:
> Hi,
> Following your mail I tried using "-device vfio-pci,host=04:02.0" as a
> parameter to qemu-system-x86_64 instead of , and I get:
> ...
> qemu-system-x86_64: -device vfio-pci,host=04:02.0: vfio error:
> 0000:04:02.0: no iommu_group found: No such file or directory
>
> Any ideas what this means ?
Make sure you have binded the device to the vfio-pci driver like explained in:
https://www.kernel.org/doc/Documentation/vfio.txt
Fam