[PATCH v2 0/6] powerpc/pkeys: fixes to pkeys

[Michael Ellerman]

Florian Weimer <fweimer at redhat.com> writes:
> On 06/14/2018 02:28 AM, Ram Pai wrote:
>> Assortment of fixes to pkey.
>> 
>> Patch 1  makes pkey consumable in multithreaded applications.
>> 
>> Patch 2  fixes fork behavior to inherit the key attributes.
>> 
>> Patch 3  A off-by-one bug made one key unusable. Fixes it.
>> 
>> Patch 4  Execute-only key is preallocated.
>> 
>> Patch 5  Makes pkey-0 less special.
>> 
>> Patch 6  Deny by default permissions on all unallocated keys.
>> 
>> Passes all selftests on powerpc. Also behavior verified to be correct
>> by Florian.
>> 
>> Changelog:
>> 
>> 	v2: . fixed merge conflict with upstream code.
>> 	    . Add patch 6. Makes the behavior consistent
>> 	      with that on x86.
>
> (Except signal handling, but I agree with Ram that the POWER behavior is 
> the correct one.)
>
>> Ram Pai (6):
>>    powerpc/pkeys: Enable all user-allocatable pkeys at init.
>>    powerpc/pkeys: Save the pkey registers before fork
>>    powerpc/pkeys: fix calculation of total pkeys.
>>    powerpc/pkeys: Preallocate execute-only key
>>    powerpc/pkeys: make protection key 0 less special
>>    powerpc/pkeys: Deny read/write/execute by default
>
> I tested the whole series with the new selftests, with the printamr.c 
> program I posted earlier, and the glibc test for pkey_alloc &c.  The 
> latter required some test fixes, but now passes as well.  As far as I 
> can tell, everything looks good now.
>
> Tested-By: Florian Weimer <fweimer at redhat.com>

Thanks. I'll add that to each patch I guess, if you're happy with that?

cheers