CVSROOT: /cvs Module name: src Changes by: [email protected] 2018/07/23 17:25:03
Modified files:
sys/arch/amd64/amd64: identcpu.c
sys/arch/amd64/include: specialreg.h
Log message:
Add "Mitigation G-2" per AMD's Whitepaper "Software Techniques for
Managing Speculation on AMD Processors"
By setting MSR C001_1029[1]=1, LFENCE becomes a dispatch serializing
instruction.
Tested on AMD FX-4100 "Bulldozer", and Linux guest in SVM vmd(8)
ok deraadt@ mlarkin@
