SPTM/MIE deep dive: sptm.t8160 820.22 -> 820.40.24 (+64 KiB)
- docs/SPTM-MIE-27.2.md: separate SPTM firmware changed (kernel __DATA_SPTM
is not the monitor); new DART GAPF race, GMMU TLBI verification, iommu
refcount, Dekker locks, hibernation handoff/latch checks; TXM build-only;
Exclave +229 KB; MIE SK tag-page check unchanged (210 insns, relocated)
- candidate directions: DART unganged-GAPF race, hibernation handoff page
count, SK tag-page aliasing, dangling tag storage; no working bypass
- correct the earlier claim that SPTM was unchanged
- tools: fw_diff, string_xref, func_string_diff