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

[Khaled Elmously]

On 2019-10-30 22:01:47 , Kai-Heng Feng wrote:
> 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(+)
> 
> -- 
> 2.17.1
> 
> 
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