Wilco Dijkstra writes:
> Hi Richard,
>
>> Could you give details? I thought it was always known that trapped
>> system register accesses were slow. In the previous versions, the
>> checks seemed to be presented as an up-front price worth paying for
>> faster atomic operations, on the systems tha
Hi Richard,
> Could you give details? I thought it was always known that trapped
> system register accesses were slow. In the previous versions, the
> checks seemed to be presented as an up-front price worth paying for
> faster atomic operations, on the systems that would use those paths.
> Now
Wilco Dijkstra writes:
> Feedback from the kernel team suggests that it's best to only use HWCAPs
> rather than also use low-level checks as done by has_lse128() and has_rcpc3().
> So change these to just use HWCAPs which simplifies the code and speeds up
> ifunc selection by avoiding expensive sy
Feedback from the kernel team suggests that it's best to only use HWCAPs
rather than also use low-level checks as done by has_lse128() and has_rcpc3().
So change these to just use HWCAPs which simplifies the code and speeds up
ifunc selection by avoiding expensive system register accesses.
Passes
