x86/tsc: Provide a means to disable TSC ART

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On systems where multiple chassis are reset asynchronously, and thus
the TSC counters are started asynchronously, the offset needed to
convert to TSC to ART would be different.  Disable ART in that case
and rely on the TSC counters to supply the accurate time.

Signed-off-by: Mike Travis <mike.travis@hpe.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Dimitri Sivanich <dimitri.sivanich@hpe.com>
Cc: Russ Anderson <russ.anderson@hpe.com>
Cc: Andrew Banman <andrew.banman@hpe.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Bin Gao <bin.gao@linux.intel.com>
Link: https://lkml.kernel.org/r/20171012163202.289397994@stormcage.americas.sgi.com

...

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mike.travis@hpe.com 2017-10-12 11:32:05 -05:00 • committed by Thomas Gleixner

parent 41e7864ab5

commit 6c66350d0a

1 changed files with 6 additions and 2 deletions

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arch/x86/kernel/tsc.c

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