While Intel has been working on the Sapphire Rapids support for Linux going back years and to other key components like GCC and LLVM/Clang to provide for a good at-launch experience with 4th Gen Xeon Scalable processors, one bit that they hadn't squared away in advance of launch has been the new C0.x idle states
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While Intel's in-development Xe kernel graphics driver is focused on supporting Tigerlake/Gen12 graphics and newer integrated/discrete graphics with this modern open-source driver with many design improvements over the aging i915 kernel driver, there looks to be one feature that as currently positioned will be missing for DG2/Alchemist: HuC support for helping with media offloading.