Re: [Qemu-devel] [PATCH RFC 0/5] Xen: introduce Xen PV target

[Wei Liu <wei.liu2@citrix.com>]

On Thu, Jan 23, 2014 at 10:30:16PM +0000, Peter Maydell wrote:
> On 23 January 2014 22:16, Wei Liu <wei.liu2@citrix.com> wrote:
> > As promised I hacked a prototype based on Paolo's disable TCG series.
> > However I coded some stubs for TCG anyway. So this series in principle
> > should work with / without Paolo's series.
> 
> I'm afraid I still think this is a terrible idea. "Xen" isn't a CPU, and

Thanks for being blunt. ;-)

> "the binary is smaller" isn't IMHO sufficient justification for breaking
> QEMU's basic structure of "target-* define target CPUs and we have
> a lot of compile time constants which are specific to a CPU which
> get defined there". How would you support a bigendian Xen CPU,
> just to pick one example of where this falls down?
> 

I think about this deeper. From Xen's (and I speculate this applies to
other hardware assisted virtulization solution as well) PoV only the
native endianess is supported, does it make sense to have a
target-native thing?

Wei.

> thanks -- PMM