On 29/11/16 21:05, Jintack Lim wrote: > On Tue, Nov 29, 2016 at 11:53 AM, Suzuki K Poulose > <suzuki.poulose@xxxxxxx> wrote: >> 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@xxxxxxx> >>>> 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. > > Thanks Suzuki. This looks very useful. > > Marc, can I write a patch based on linux-next? The commit which has > cpus_have_const_cap() is not in master and next branch in kvm/arm > repo. You can. It is just that I won't be able to apply it immediately (I'll wait for -rc1 to be out, and send it as a fix). Thanks, M. -- Jazz is not dead. It just smells funny... -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
