Re: [RFC PATCH] docs/about/deprecated: Deprecate 32-bit host systems

[Reinoud Zandijk]

On Wed, Feb 22, 2023 at 09:51:57AM +0000, Daniel P. Berrangé wrote:
> On Wed, Feb 22, 2023 at 09:11:13AM +0000, Bernhard Beschow wrote:
> > Are there any plans or ideas to support 128 bit architectures
> > such as CHERI in the future? There is already a QEMU fork
> > implementing CHERI for RISC V [1]. Also ARM has developed an
> > experimental hardware implementation of CHERI within the Morello
> > project where Linaro is involved as well, although the QEMU
> > implementation is performed by the University of Cambridge [2].
> 
> If 128 bit hardware exists and has real world non-toy usage,
> then a request to support it in QEMU is essentially inevitable.
> 
> > I'm asking because once we deeply bake in the assumption that
> > host size >= guest size then adding such architectures will
> > become much harder.
> 
> Yep, that is a risk.

I can second that. Better keep it in the code and deal with it. Maybe those
specific parts can be implemented in such a way that it can easily become a
noop on host size >= guest size.

With regards,
Reinoud