On Fri, Nov 26 2021 at 11:11, taoyi ty wrote:
> On 11/25/21 11:15 PM, Thomas Gleixner wrote:
>>> +void setup_pks(void)
>>> +{
>>> + if (!cpu_feature_enabled(X86_FEATURE_PKS))
>>> + return;
>>> +
>>> + write_pkrs(pkrs_init_value);
>>
>> Is the init value set up _before_ this function is invoked for the first
>> time?
>>
> Setting up for cpu0 is before create_initial_pkrs_value. therefore pkrs
> value of cpu0 won't be set correctly.
>
> [root@AliYun ~]# rdmsr -a 0x000006E1
> 0
> 55555554
> 55555554
> 55555554
> 55555554
> 55555554
> 55555554
> 55555554
> 55555554
> 55555554
>
> Here are my test results after applying the patches
Thanks for confirming what I assumed from looking at the patches!
tglx
