x86::msr::MSR_LASTBRANCH_TOS [−] [src]

pub const MSR_LASTBRANCH_TOS: u32 = 474

Last Branch Record Stack TOS (R/W) Contains an index (0-3 or 0-15) that points to the top of the last branch record stack (that is, that points the index of the MSR containing the most recent branch record). See Section 17.9.2, LBR Stack for Processors Based on Intel NetBurst® Microarchitecture ; and addresses 1DBH-1DEH and 680H-68FH.