On Tue, 20 Aug 2024 22:46:30 +0100, Oliver Upton oliver.upton@linux.dev 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@google.com Signed-off-by: Marc Zyngier maz@kernel.org Cc: stable@vger.kernel.org
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?
M.