On Wed, Aug 21, 2024 at 11:59:52AM +0100, Marc Zyngier wrote: > On Tue, 20 Aug 2024 22:46:30 +0100, > Oliver Upton <oliver.upton@xxxxxxxxx> wrote: > > > > On Tue, Aug 20, 2024 at 11:03:38AM +0100, Marc Zyngier wrote: > > > On a system with a GICv3, if a guest hasn't been configured with > > > GICv3 and that the host is not capable of GICv2 emulation, > > > a write to any of the ICC_*SGI*_EL1 registers is trapped to EL2. > > > > > > We therefore try to emulate the SGI access, only to hit a NULL > > > pointer as no private interrupt is allocated (no GIC, remember?). > > > > > > The obvious fix is to give the guest what it deserves, in the > > > shape of a UNDEF exception. > > > > > > Reported-by: Alexander Potapenko <glider@xxxxxxxxxx> > > > Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx> > > > Cc: stable@xxxxxxxxxxxxxxx > > > > LGTM, and just as an FYI I do plan on grabbing this for 6.11 > > Great, thanks. Are you planning to route this via arm64, given that > Paolo is away for a bit? Yup, exactly that. I'll send the PR in the next day or two when I have some time to kick the tires on everything. -- Thanks, Oliver
