[libvirt] [PATCH] tools/virt-host-validate: Fix IOMMU check on s390x

[Bjoern Walk]

Thomas Huth <thuth at redhat.com> [2019-02-26, 12:02PM +0100]:
> When running virt-host-validate on an s390x host, the tool currently
> warns that it is "Unknown if this platform has IOMMU support".
> We can use the common check for entries in sys/kernel/iommu_groups here,
> too, but it only makes sense to check it if there are also PCI devices
> available. It's also common on s390x that there are no PCI devices
> assigned to the LPAR, and in that case there is no need for the
> PCI-related IOMMU, so without PCI devices we should simply skip this
> test.
> 
> Signed-off-by: Thomas Huth <thuth at redhat.com>

Makes sense.

Reviewed-by: Bjoern Walk <bwalk at linux.ibm.com>
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