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 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
