Re: Do we need "amd_iommu=on" for AMD system anymore?
On Tue, Jun 30, 2020 at 11:33:10AM +0800, Yalan Zhang wrote:
Hi,
Since long time ago, to enable the SR-IOV VF pci passthrough function, I'm
always adding "amd_iommu=on" into kernel cmdline on AMD system.
But recently I found even I do not do this action, IOMMU is still enabled
by kernel on AMD system.
I don't know history of amd_iommu=on, but currently libvirt's official
recommendation for AMD hosts, via virt-host-validate is
iommu=pt iommu=1
Regards,
Daniel
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