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