x86/tsc: Add option that TSC on Socket 0 being non-zero is valid

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Add a flag to indicate and process that TSC counters are on chassis
that reset at different times during system startup.  Therefore which
TSC ADJUST values should be zero is not predictable.

Signed-off-by: Mike Travis <mike.travis@hpe.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Dimitri Sivanich <dimitri.sivanich@hpe.com>
Reviewed-by: Russ Anderson <russ.anderson@hpe.com>
Reviewed-by: Andrew Banman <andrew.abanman@hpe.com>
Reviewed-by: Peter Zijlstra <peterz@infradead.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Andrew Banman <andrew.banman@hpe.com>
Cc: Bin Gao <bin.gao@linux.intel.com>
Link: https://lkml.kernel.org/r/20171012163201.944370012@stormcage.americas.sgi.com

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mike.travis@hpe.com 2017-10-12 11:32:02 -05:00 • committed by Thomas Gleixner

parent ccb64941f3

commit 341102c3ef

2 changed files with 37 additions and 4 deletions

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2

arch/x86/include/asm/tsc.h

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35

arch/x86/kernel/tsc_sync.c

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