On Tue, 31 Jan 2023 22:09:53 +0000, Oliver Upton <oliver.upton@xxxxxxxxx> wrote: > > On Tue, Jan 31, 2023 at 10:04:40PM +0000, Marc Zyngier wrote: > > On Tue, 31 Jan 2023 20:17:50 +0000, Oliver Upton <oliver.upton@xxxxxxxxx> wrote: > > > > > > On Tue, Jan 31, 2023 at 09:24:04AM +0000, Marc Zyngier wrote: > > > > From: Christoffer Dall <christoffer.dall@xxxxxxx> > > > > > > > > The VMPIDR_EL2 and VPIDR_EL2 are architecturally UNKNOWN at reset, but > > > > let's be nice to a guest hypervisor behaving foolishly and reset these > > > > to something reasonable anyway. > > > > > > Must we be so kind? :) > > > > > > In all seriousness, I've found the hexspeak value of reset_unknown() to > > > be a rather useful debugging aid. And I can promise you that I'll use NV > > > to debug my own crap changes! > > > > > > Any particular reason against just using reset_unknown()? > > > > Because debugging NV itself is hell when all you have is a model! > > Blech! > > > As we were trying to debug the early code base, we really wanted to > > make it easy to run tiny guests without much setup, and work out of > > the box. That's how this sort of changes came about. > > > > In any case, something like this the hack below works as well (I just > > booted an L1 and a couple of L2s with it, and nothing caught fire). > > LGTM, mind squashing it into the previous patch? Sure thing. M. -- Without deviation from the norm, progress is not possible.
