Re: [PATCH 3/8] arm64: cpufeature: Add CPU capability for AArch32 EL1 support

[Marc Zyngier]

Hi Will,

On 2020-04-14 22:31, Will Deacon wrote:
> Although we emit a "SANITY CHECK" warning and taint the kernel if we
> detect a CPU mismatch for AArch32 support at EL1, we still online the
> CPU with disastrous consequences for any running 32-bit VMs.
>
> Introduce a capability for AArch32 support at EL1 so that late onlining
> of incompatible CPUs is forbidden.
>
> Signed-off-by: Will Deacon <will@xxxxxxxxxx>

Definitely an improvement over the current situation, as the direct read
of ID_AA64PFR0 was always a bit dodgy. Given that I'm pretty sure these 
new
braindead SoCs are going to run an older version of the kernel, should 
we
Cc stable for this?

Otherwise:

Acked-by: Marc Zyngier <maz@xxxxxxxxxx>

        M.
--
Jazz is not dead. It just smells funny...