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A comment on Undocumented x86 instructions to control the CPU at the microarchitecture level [pdf]. Parent comment

Re:Undocumented x86 instructions to control the CPU at the m... by dmitrygr on Wednesday July 07, 2021 @04:41PM (#27765524)
anything! if you can get them to execute. the authors found one way to enable them, but others may exist (we do not know). maybe another secret instruction enables these also. we do not know.
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