On Wed, Nov 30, 2016 at 8:31 AM, Marc Zyngier [off-list ref] wrote:

On 29/11/16 21:05, Jintack Lim wrote:

quoted

On Tue, Nov 29, 2016 at 11:53 AM, Suzuki K Poulose
[off-list ref] wrote:

quoted

On 29/11/16 09:36, Marc Zyngier wrote:

quoted

On 29/11/16 03:28, Jintack Lim wrote:

quoted

On Mon, Nov 28, 2016 at 1:39 PM, Marc Zyngier [off-list ref]
wrote:

quoted

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).

Ok. Thanks!. I'll send out v2.

Thanks,

        M.
--
Jazz is not dead. It just smells funny...