git: pc64: Setup TSC_AUX register with each cpu's id, when rdtscp is available.

Tue Sep 5 13:21:14 PDT 2017

commit 19d996da66c61a63ff5f16a3a1ab233ad2c67db2
Author: Imre VadÃ¡sz <imre at vdsz.com>
Date:   Sun Sep 3 12:49:20 2017 +0200

    pc64: Setup TSC_AUX register with each cpu's id, when rdtscp is available.
    
    * This allows userland to utilize the rdtscp instruction, to associate
      timestamps to physical cores, and detect migration between 2 measurements.

Summary of changes:
 sys/cpu/x86_64/include/specialreg.h | 5 +++++
 sys/platform/pc64/x86_64/initcpu.c  | 4 ++++
 2 files changed, 9 insertions(+)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/19d996da66c61a63ff5f16a3a1ab233ad2c67db2


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