On Mon, 7 Jul 2025 at 16:44, Marc Zyngier <m...@kernel.org> wrote: > > On Mon, 07 Jul 2025 15:46:04 +0100, > Peter Maydell <peter.mayd...@linaro.org> wrote: > > Speaking of GIC ID registers, we never updated QEMU to > > handle the GICv4.1 GICD_TYPER2 register, so we don't try > > to send and sanity check that on migration at the moment. > > KVM only exposes a virtual GICv3 to the guest, even in the host can do > GICv4.0+. The only nit is the "nASSGIcap" bit, which is always > advertised to the guest when the host if v4.1-capable. We have a patch > series in progress to address this and make it controllable.
Isn't that out-of-spec? If the GIC the guest sees is a GICv3 then GICD_TYPER2 should be RES0... Anyway, I have some lightly tested QEMU patches that migrate the GICD_TYPER2 value, which I'll send out in a moment. -- PMM
