Re: [PATCH v5] arch/x86: Update config and kernel doc for MPK feature on AMD

[Dave Hansen]

On 5/23/20 5:21 AM, Borislav Petkov wrote:
>> +config X86_MEMORY_PROTECTION_KEYS
>> +	# Set the "INTEL_"-free option whenever the "INTEL_" one is set.
>> +	# The "INTEL_" one should be removed and replaced by this option
>> +	# after 5.10. This avoids exposing most 'oldconfig' users to this
>> +	# churn.
>> +	def_bool X86_INTEL_MEMORY_PROTECTION_KEYS
> I only picked up the discussion from the sidelines but why do we need
> this at all? If we don't want to have churn, then we can leave it be
> called X86_INTEL_MEMORY_PROTECTION_KEYS, not change the manpage and
> have this depend on CPU_SUP_AMD too so that people can select it on AMD
> machines, and get on with our lives.
> 
> So what's up?

Thanks for pointing that out.  I think this ended up mixing together the
two alternative, which doesn't make much sense.

Babu, let's just leave the config option _naming_ entirely in place.
The only change should be to the dependencies and the description text.