Re: [PATCH 6/7] x86/boot/tboot: Move tboot_force_iommu() to Intel IOMMU

[Jacob Pan]

Hi Jason,

On Mon, 16 May 2022 15:06:28 -0300, Jason Gunthorpe <jgg@xxxxxxxxxx> wrote:

> Unrelated, but when we are in the special secure IOMMU modes, do we
> force ATS off? Specifically does the IOMMU reject TLPs that are marked
> as translated?
Yes, VT-d context entry has a Device TLB Enable bit, if 0, it means
"Translation Requests (with or without PASID) and Translated Requests
received and processed through this scalable-mode context-entry are
blocked."

Thanks,

Jacob