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Intel TDX Host Support Merged For KVM With Linux 6.16
While Intel Trust Domain Extensions (TDX) has been around since Sapphire Rapids with select SKUs and with widespread availability since Emerald Rapids in late 2023, only now with the Linux 6.16 kernel debuting in H2'2025 is there going to be mainline kernel support for TDX on the host-side with the Kernel-based Virtual Machine (KVM).
While Intel Trust Domain Extensions(TDX) has been around since Sapphire Rapids with select SKUs and with widespread availability since Emerald Rapids in late 2023, only now with the Linux 6.16 kernel debuting in H2'2025 is there going to be mainline kernel support for TDX on the host-side with the Kernel-based Virtual Machine (KVM). The road to getting all of the Intel TDX bits upstreamed to the mainline Linux kernel and other open-source software has been an excruciatingly long journey. This is quite a large series, including support for private page tables (managed by the TDX module and mirrored in KVM for efficiency), forwarding some TDVMCALLs to userspace, and handling several special VM exits from the TDX module.
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