Xen devel - Dec 2013 - why only i386 target enabled for qemu-xen even on am64 machine?

HI folks:
  I''m just curious why only i386 target is enabled for qemu-xen even
on my am64 machine?
I mean why x86_64 target not enabled

  following code from tools/Makefile,

subdir-all-qemu-xen-dir: qemu-xen-dir-find
          if test -d $(QEMU_UPSTREAM_URL) ; then \
                  source=$(QEMU_UPSTREAM_URL); \
          else \
                  source=.; \
          fi; \
          cd qemu-xen-dir; \
          $$source/configure --enable-xen --target-list=i386-softmmu \


Lan

On Fri, 2013-12-06 at 17:51 +0800, Dennis Lan (dlan)
wrote:
> HI folks:
>   I''m just curious why only i386 target is enabled for qemu-xen
even
> on my am64 machine?
> I mean why x86_64 target not enabled
Xen only uses the device emulation capabilities of qemu and not the
processor emulation capabilities, so it doesn''t matter which processor
target is used.

Ian.