I've also been dealing with KVM issues these past couple of days
and try to ask AI too
it said Nick is build the right kernel, like the command you check
but the problem seems is cpu can enter to EL2 mode(which has virtualization support)
and that's the problem on bootloader
so we need to wait Allwinner and radxa to fix together
and also since Nick quoted the offical response on "A7A: Harware Virtualization"
so I check the offical image too
and have the same issue, the system also don't supported virtualization too
I think this also confirms to some extent for EL2 mode switch support
btw Nick also discussing this issue with others in the Discord channel seems to have yielded no results
because I know very little about ARM SBC
I'm unable to participate in this discussion(can only watch and test)
but I think maybe this issue should be reported to official
so they will know only hardware supported it
but the bootloader stuck(if AI's conclusions right)