Re: [Qemu-devel] [PATCH] [RFC] cleanup cpu-exec.c: consolidate handle_cpu_signal

[Avi Kivity]

Paul Brook wrote:
> > I'd really like to see kvm used to implement something like this (to
> > emulate non-x86 on x86).
> >     
>
> It's something I've considered a few times. It gets hairy fairly quickly 
> though. You're probably also going to hit a world of pain if your host 
> pagesize is larger than your guest pagesize,

Yes.  But realistically your host is going to be either x86 or x86 (in a 
few corner cases that no one cares about, x86).  Are there targets with 
page size < 4K?  We don't target VAX.

>  and for guests with a software 
> managed TLB shadow paging gets much more interesting.
>   

Hmm, inserting a tlb entry would just create x86 page table entries, no?

> There's very little of the old code left, and it's bitrotten enough that 
> there's no point trying to keep it on the offchance that it'll be useful.
>   

Sure, starting from scratch sounds much better, this is going to be 
wildly different.

--
Do not meddle in the internals of kernels, for they are subtle and quick to 
panic.