Re: [Qemu-devel] Making cputlb.c operations safe for MTTCG

[Richard Henderson]

On 08/02/2016 12:07 PM, Alex Bennée wrote:
> This will work but I wonder if it is time to call it a day for 32 on 64
> support? I mean all this can be worked around but I wonder if it is
> worth the effort if no one actually uses this combination.

I've been meaning to bring up exactly this question during the 2.8 cycle.

Given the changes we want to make with target atomic operations, I think it's a 
complete waste of time to continue to support 64-on-32.

Indeed, it's half-tempting to drop 32-bit host support entirely.  But while 
i686, arm, and mips hosts continue to function for simple guests, it is perhaps 
a step too far to drop it all (yet).

> I might prepare a patch for the next dev cycle to promote discussion.

Please do.


r~