Re: [Qemu-devel] Virtual IOMMU is working for Windows VM?

[Peter Xu]

On Mon, Oct 22, 2018 at 12:22:02AM -0400, Jintack Lim wrote:
> Hi,
> 
> I wonder if vIOMMU is working for Windows VM?
> 
> I tried it with v2.11.0, but it didn't seem to work. I assume that seaBIOS
> sets IOMMU on by default as is the case when I launched a Linux VM. But I
> might be missing something. Can somebody shed some light on it?

Hi, Jintack,

I think at least the latest QEMU should work for Windows, but I don't
really run Windows that frequently.

What is the error you've encountered?  Have you tried the latest QEMU,
or switching Windows versions to try?

What I can remember about Windows is that Ladi had fixed a bug for
windows-only (8991c460be, "intel_iommu: relax iq tail check on
VTD_GCMD_QIE enable", 2017-07-03) but it should be even in 2.10 so I
guess it's not the problem you've encountered.

Regards,

-- 
Peter Xu