Re: [patch V9 00/39] x86/entry: Rework leftovers (was part V)

From: Paolo Bonzini
Date: Thu Jun 04 2020 - 09:29:38 EST

On 04/06/20 15:25, Peter Zijlstra wrote:
> It being enabled through IA32_DEBUGCTL instead of through DR7 means that
> the current code doesn't disable it and this then means we can have
> nested #DB again.

/me bangs head on door

> Who sodding throught this was a good idea ?! What happened to #AC that
> SLD currently uses?

It was per-core and (presumably) considered unfixable?