Re: [PATCH v2 7/9] KVM: x86/mmu: Add try_get_mt_mask to x86_ops

[Sean Christopherson]

On Mon, Apr 11, 2022, Sean Christopherson wrote:
> And as a bonus, if we use 0/-errno, then we can use KVM_X86_OP_OPTIONAL_RET0()
> and SVM doesn't need to provide an implementation.

Gah, got ahead of myself.  If we go this route, the caller would need to ensure
it initializes mt_mask.  Probabably not worth it, so scratch that idea.  I also
though about overloading the return type, e.g.

	mt_mask = ...
	if (mt_mask < 0)
		return false;

But again, probably not a net positive.