Re: [Qemu-devel] [PATCH 15/35] tcg-s390: Query instruction extensions that are installed.

[Richard Henderson]

On 06/13/2010 03:23 PM, Alexander Graf wrote:
> On 13.06.2010, at 18:44, Aurelien Jarno wrote:
>> Is KVM in 31-bit mode actually functional?
> 
> I'm not aware of anything preventing it to be. But I honestly haven't
> tried. As long as all hypercall parameters stay within the first
> 32/31 bits, things should be safe.

On the other hand, is there any point in supporting it?
This does seem to be a case for which it does seem like
having the extra VM space (KVM+TCG) and the extra register
size (TCG) is extremely helpful.

I'd be just as happy to adjust the configury to actively
prevent compilation in 31-bit mode, rather than pretend
it might work and never bother to test it...


r~