Re: [RFC PATCH 0/3] Add Documentation for /proc/cpuinfo flags

[Dave Hansen]

On 6/10/20 1:35 PM, Borislav Petkov wrote:
> On Wed, Jun 10, 2020 at 01:06:58PM -0700, Kyung Min Park wrote:
>> Include two instances of features for which there are not implemented
>> use cases in the kernel.
>>
>> Patch 1 creates a new documentation for /proc/cpuinfo flags bits.
>> Patch 2 adds X86_FEATURE_SERIALIZE.
>> Patch 3 adds X86_FEATURE_TSXLDTRK.
>>
>> This RFC series has been reviewed by Dave Hansen.
> Yeah, and he and I talked about this on IRC. If you really want to dump
> CPUID to see what's there, we should do a userspace tool in tools/ or
> even use the ones which are already out there: x86info, cpuid, ...
> 
> Just adding X86_FEATURE_* flags without usage in the kernel makes no
> sense and will cause unnecessary bloat and doesn't help one bit because
> userspace simply calls CPUID directly.

Could we ignore the new flag patches for the moment and make sure
everyone is on board with what the new Documentation/ says?