Re: [Qemu-devel] release retrospective, next release timing, numbering

[Richard Henderson]

On 04/27/2018 02:01 PM, Michal Suchánek wrote:
> Is there any reason why the 64bit emulator would not run on 32bit
> system? The emulated 64bit system is .. emulated after all.

It does run, but it requires that the 32-bit host perform double-word
arithmetic to emulate the 64-bit guest.  When the 64-bit guest is really a
32-bit guest in disguise, this carries a performance penalty.

If we ever stop caring about 32-bit hosts, the question becomes moot.


r~