On Mon, Oct 03, 2016 at 13:41:13 +0100, Daniel Berrange wrote: > The intel-iommu device has existed since QEMU 2.2.0, but > it was only possible to create it with -device since > QEMU 2.7.0, thanks to: > > commit 621d983a1f9051f4cfc3f402569b46b77d8449fc > Author: Marcel Apfelbaum <marcel@xxxxxxxxxx> > Date: Mon Jun 27 18:38:34 2016 +0300 > > hw/iommu: enable iommu with -device > > Use the standard '-device intel-iommu' to create the IOMMU device. > The legacy '-machine,iommu=on' can still be used. > > The libvirt capability check & command line formatting code > is thus broken for all QEMU versions 2.2.0 -> 2.6.0 inclusive. > > This fixes it to use iommu=on instead. > > Signed-off-by: Daniel P. Berrange <berrange@xxxxxxxxxx> > --- Is there any value to make it work with older versions rather than just clearing it completely on the versions that don't support it with -device? Peter
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