[PATCH] KVM: arm64: Do not let a L1 hypervisor access the *32_EL2 sysregs

[Marc Zyngier]

On Sat, 14 Oct 2023 04:32:46 +0100,
Oliver Upton <oliver.upton at linux.dev> wrote:
> 
> On Fri, Oct 13, 2023 at 11:33:11PM +0100, Marc Zyngier wrote:
> > DBGVCR32_EL2, DACR32_EL2, IFSR32_EL2 and FPEXC32_EL2 are required to
> > UNDEF when AArch32 isn't implemented, which is definitely the case when
> > running NV.
> > 
> > Given that this is the only case where these registers can trap,
> > unconditionally inject an UNDEF exception.
> > 
> > Signed-off-by: Marc Zyngier <maz at kernel.org>
> 
> If you intend to send this as a fix for 6.6:
> 
> Reviewed-by: Oliver Upton <oliver.upton at linux.dev>
> 
> Otherwise it is on the stack of patches I'll pick up for 6.7

Thanks.

I've queued it as a fix for now, together with Miguel's NV fix
series.

	M.

-- 
Without deviation from the norm, progress is not possible.