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OpenBSD — sys/arch/amd64/amd64 identcpu.c, sys/arch/amd64/include specialreg.h

mikeb @ master - f16aad7b - 2017-01-13 17:15:28 
Disable and lock Silicon Debug feature on modern Intel CPUs

This implements one of the countermeasures against using Direct
Connect Interface (DCI) to debug CPUs via USB3 mentioned in the
"Tapping into the core" talk at the 33c3: identify and disable
the Silicon Debug feature found in Haswell and newer CPUs.

ok mlarkin, deraadt
Delta File
+20 -1 sys/arch/amd64/amd64/identcpu.c
+20 -1 sys/arch/i386/i386/machdep.c
+7 -1 sys/arch/amd64/include/specialreg.h
+7 -1 sys/arch/i386/include/specialreg.h
+54 -4 4 files

Diffs and file contents unavailable.