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SubjectRe: [RFC/RFT] Add noats flag to boot parameters
On Thu, May 03, 2018 at 09:46:34AM -0400, Sinan Kaya wrote:
> I also like the idea in general.
> Minor nit..
>
> Shouldn't this be an iommu parameter rather than a PCI kernel command line parameter?
> We now have an iommu.passthrough argument that prevents page translation.
>
> Doesn't this fit into the same category especially when it is the IOMMU drivers that
> call ATS functions for enablement not the PCI drivers.

ATS is a bit of a grey area between PCI and IOMMU, but since ATS is
PCI-specific and the code to enable/disable it is in PCI as well, I
think the parameter makes sense for PCI too.


Joerg

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