[PATCH] KVM: arm/arm64: Access CNTHCTL_EL2 bit fields correctly

[Suzuki K Poulose]

On 29/11/16 09:36, Marc Zyngier wrote:
> On 29/11/16 03:28, Jintack Lim wrote:
>> On Mon, Nov 28, 2016 at 1:39 PM, Marc Zyngier <marc.zyngier at arm.com> wrote:
>>> On 28/11/16 17:43, Marc Zyngier wrote:
>> This looks much cleaner than my patch.
>> While we are at it, is it worth to consider that we just need to set
>> those bits once for VHE case, not for every world switch as an
>> optimization?
>
> Ah! That's a much better idea indeed! And we could stop messing with
> cntvoff_el2 as well, as it doesn't need to be restored to zero on exit.
> Could you try and respin something along those lines?
>

fyi, we have a static_key based cpus_have_const_cap() for Constant cap
checking (like this case) available in linux-next. May be you could make use
of that instead of alternatives.


Cheers
Suzuki