x86/apic: Add TSC_DEADLINE quirk due to errata

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Due to errata it is possible for the TSC_DEADLINE timer to misbehave
after using TSC_ADJUST. A microcode update is available to fix this
situation.

Avoid using the TSC_DEADLINE timer if it is affected by this issue and
report the required microcode version.

[ tglx: Renamed function to apic_check_deadline_errata() ]

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: kevin.b.stanton@intel.com
Link: http://lkml.kernel.org/r/20170531155306.050849877@infradead.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

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Peter Zijlstra 2017-05-31 17:52:03 +02:00 • committed by Thomas Gleixner

parent c6e9f42bbe

commit bd9240a18e

1 changed files with 79 additions and 0 deletions

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arch/x86/kernel/apic/apic.c

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