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

[You-Sheng Yang]

Please also apply
https://lists.ubuntu.com/archives/kernel-team/2019-November/105289.html
or it may cause regression.

On 2019-11-12 12:00, Khaled Elmously wrote:
> 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
>>
>>
>> -- 
>> kernel-team mailing list
>> kernel-team at lists.ubuntu.com
>> https://lists.ubuntu.com/mailman/listinfo/kernel-team
> 

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