Harden the hardware-enablement broad seed for newer hardware:
- xe vs i915: intel.guc emits the i915 param (i915.enable_guc=3), which the
newer `xe` driver (Lunar Lake / Battlemage / Panther Lake, recent Xe GPUs)
ignores — it enables GuC by default. hardware-db.sh now reads the in-use
GPU driver (lspci -k) and writes `intel.guc = false` on xe hardware, so the
toggle isn't a misleading no-op there.
- NPU detection by PCI accelerator class [1200] (+ keywords), attributing the
vendor, instead of a fixed device-ID list — so new NPUs (e.g. Panther Lake)
are caught without a code change. Known IDs kept as a fallback/reference.
- Kernel awareness: a nomarchy.hardware.latestKernel escape hatch
(linuxPackages_latest) for very-new hardware whose drivers only just landed,
and a build-time warning when npu.enable predates the shipped kernel
(amdxdna needs 6.14+, intel_vpu wants recent). Downstream default is 6.18,
which already carries amd-pstate + amdxdna; the reference host pins latest.
- VM test (checks.hardware-toggles, pkgs.testers.runNixOSTest): boots a
minimal VM with the toggles on and asserts the config landed — amd_pstate
+ i915.enable_guc in /proc/cmdline, fprintd.service present, pam_fprintd in
/etc/pam.d/sudo. Passing. (Hardware behaviour still needs bare metal.)
Docs: README + template note latestKernel; ROADMAP records the hardening.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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