[PATCH] KVM: arm64: Add helper to identify a nested context

[Oliver Upton]

On Sat, May 31, 2025 at 05:49:01PM +0100, Marc Zyngier wrote:
> A common idiom in the KVM code is to check if we are currently
> dealing with a "nested" context, defined as having NV enabled,
> but being in the EL1&0 translation regime.
> 
> This is usually expressed as:
> 
> 	if (vcpu_has_nv(vcpu) && !is_hyp_ctxt(vcpu) ... )
> 
> which is a mouthful and a bit hard to read, specially when followed
> by additional conditions.
> 
> Introduce a new helper that encapsulate these two terms, allowing
> the above to be written as
> 
> 	if (is_nested_context(vcpu) ... )
> 
> which is both shorter and easier to read, and makes more obvious
> the potential for simplification on some code paths.
> 
> Signed-off-by: Marc Zyngier <maz at kernel.org>

Thanks! I'll probably pick this up as a prefix on my abort routing
series if that's OK with you.

Best,
Oliver