Messages in this thread | | | Date | Tue, 17 May 2022 10:05:43 +0800 | Subject | Re: [PATCH 6/7] x86/boot/tboot: Move tboot_force_iommu() to Intel IOMMU | From | Baolu Lu <> |
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Hi Jason,
On 2022/5/17 02:06, Jason Gunthorpe wrote: >> +static __init int tboot_force_iommu(void) >> +{ >> + if (!tboot_enabled()) >> + return 0; >> + >> + if (no_iommu || dmar_disabled) >> + pr_warn("Forcing Intel-IOMMU to enabled\n"); > 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?
Good question. From IOMMU point of view, I don't see a point to force ATS off, but trust boot involves lots of other things that I am not familiar with. Anybody else could help to answer?
Best regards, baolu
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