Re: [PATCH v2 03/25] KVM: arm64: Make kvm_condition_valid32() accessible from EL2

Marc Zyngier
2017-06-05T08:13:53Z

On 04/06/17 13:11, Christoffer Dall wrote:
> On Thu, Jun 01, 2017 at 11:20:55AM +0100, Marc Zyngier wrote:
>> As we're about to trap CP15 accesses and handle them at EL2, we
>> need to evaluate whether or not the condition flags are valid,
>> as an implementation is allowed to trap despite the condition
>> not being met.
>>
>> Tagging the function as __hyp_text allows this.
>
> is the cc_map also guaranteed to work (by simple reference) in EL2 then?

Yes. By virtue of being const, this ends up in the read-only part of the
kernel, which we always map at EL2.

Thanks,

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