Nicholas Piggin <npig...@gmail.com> writes:
> Haren Myneni's on March 19, 2020 4:13 pm:
>>
>> Kernel sets fault address and status in CRB for NX page fault on user
>> space address after processing page fault. User space gets the signal
>> and handles the fault mentioned in CRB by bringing the page in to
>> memory and send NX request again.
>>
>> Signed-off-by: Sukadev Bhattiprolu <suka...@linux.vnet.ibm.com>
>> Signed-off-by: Haren Myneni <ha...@linux.ibm.com>
>> ---
>> arch/powerpc/include/asm/icswx.h | 18 +++++++++++++++++-
>> 1 file changed, 17 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/powerpc/include/asm/icswx.h
>> b/arch/powerpc/include/asm/icswx.h
>> index 9872f85..b233d1e 100644
>> --- a/arch/powerpc/include/asm/icswx.h
>> +++ b/arch/powerpc/include/asm/icswx.h
>
> "icswx" is not a thing anymore, after 6ff4d3e96652 ("powerpc: Remove old
> unused icswx based coprocessor support").
Yeah that commit ripped out some parts of the previous attempt at a user
visible API for this sort of "coprocessor" stuff. VAS is yet another
attempt to do something useful with most of the same pieces but some
slightly different details.
> I guess NX is reusing some
> things from it, but it would be good to get rid of the cruft and re-name
> this file and and relevant names.
> NX already uses this file, so I guesss that can happen after this series.
A lot of the CRB/CSB stuff is still the same, and P8 still uses icswx.
But I'd be happy if the header was renamed eventually, as icswx is now a
legacy name.
cheers
