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xen-devel
RE: [Xen-devel] 64Bits I/O Requests
> -----Original Message-----
> From: Petersson, Mats [mailto:Mats.Petersson@xxxxxxx]
> Sent: Tuesday, June 05, 2007 4:27 PM
> To: Guy Zana; Keir Fraser; xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: RE: [Xen-devel] 64Bits I/O Requests
>
> >
> > Hi,
> >
> > Is there a plan to support 64bit io-requests ?
> > For instance, movq (mmx) will fail today.
>
> About a year ago, I was working on this, but some other
> project got in the way, so it never got into Xen. It's not
> HARD as such, but it requires some pretty big modifications
> to the way that qemu-dm and instruction emulation is done
> (preferrably using the code in x86_emulate.c).
>
Yes, it requires a lot of modifications in the qemu interface,
I thought about splitting each 64bit write memory access into two 32bit ones
but it will be complicated to perform _reads_ like that.
Do you have something useable to send?
Thanks,
Guy.
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