Re: [PATCH v4 63/75] x86/sev-es: Handle #DB Events

Joerg Roedel
2020-07-15T10:31:26Z

On Wed, Jul 15, 2020 at 12:13:10PM +0200, Peter Zijlstra wrote:
> On Wed, Jul 15, 2020 at 12:08:08PM +0200, Joerg Roedel wrote:
> > Right, but the handler calls into various other functions. I actually
> > started to annotate them all with noinstr, but that was a can of worms
> > when calling into generic kernel functions. And the only problem with
> > intrumentation in the #VC handler is the #VC-for-#DB exit-code, so I
> > decided to only handle this one with instrumentation forbidden and allow
> > it for the rest of the handler.
>
> OK, then maybe change the comment to something like:
>
> /*
> * Handle #DB before calling any !noinstr code to avoid
> * recursive #DB.
> */

Sounds good, will do.

Thanks,

Joerg