Re: [RFC PATCH v3 for 4.15 08/24] Provide cpu_opv system call

On Thu, 16 Nov 2017, Andi Kleen wrote:

My preference would be just to drop this new super ugly system call. 

It's also not just the ugliness, but the very large attack surface
that worries me here.

As far as I know it is only needed to support single stepping, correct?

I can't figure that out because the changelog describes only WHAT the patch
does and not WHY. Useful, isn't it?

Then this whole mess would disappear.

Agreed. That would be much appreciated.

Thanks,

	tglx