[PATCH] AArch64: Add hp-timing.h
Adhemerval Zanella
adhemerval.zanella@linaro.org
Mon Jun 28 13:15:11 GMT 2021
On 28/06/2021 09:10, Wilco Dijkstra via Libc-alpha wrote:
> Hi Szabolcs,
>
>> iirc linux devs asked that it is only used in vdso so
>> that it is under the kernel's control in case there
>> are implementation issues (vdso is easy to disable
>> and on some system it got disabled for timer reasons).
>
> No, the kernel must still emulate cntvct_el0 in that case because of SBSA
> which requires that the timer is always available. This is just as easy as
> disabling vDSO - and we know this works and is surprisingly fast as I
> mentioned.
Any particular reason why you haven't enabled HP_TIMING_INLINE to 1?
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