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

[Suzuki K Poulose]

On 04/14/2020 10:31 PM, 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>

One of the other important missing sanity check for KVM is the VMID 
width check. I will code something up.

Reviewed-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>