[SRU] [B/D/E/Unstable/OEM-B/OEM-OSP1-B] [PATCH 0/2] Disable unreliable HPET on CFL/ICL systems

[Kai-Heng Feng]

BugLink: https://bugs.launchpad.net/bugs/1840239

[Impact]
TSC marked unstable by skewed HPET after Intel SoC reached PC10 state.

[Fix]
Disable HPET on affected SoC generations, currently happens to CFL and
ICL.

[Test]
I can confirm disabling HPET can avoid this issue.

[Regression Potential]
Low. TSC on recent Intel SoC is now an invariant clocksource, so it's
harmless to disable HPET on these platforms.

Kai-Heng Feng (2):
  UBUNTU: SAUCE: x86/intel: Disable HPET on Intel Coffe Lake platforms
  UBUNTU: SAUCE: x86/intel: Disable HPET on Intel Ice Lake platforms

 arch/x86/kernel/early-quirks.c | 4 ++++
 1 file changed, 4 insertions(+)

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2.17.1