On Tue, Jun 09, 2020 at 07:17:20AM +0800, Lu Baolu wrote:
> PCI ACS is disabled if Intel IOMMU is off by default or intel_iommu=off
> is used in command line. Unfortunately, Intel IOMMU will be forced on if
> there're devices sitting on an external facing PCI port that is marked
> as untrusted (for
PCI ACS is disabled if Intel IOMMU is off by default or intel_iommu=off
is used in command line. Unfortunately, Intel IOMMU will be forced on if
there're devices sitting on an external facing PCI port that is marked
as untrusted (for example, thunderbolt peripherals). That means, PCI ACS
is disable
