Re: [Xen-devel] [PATCH] libxl: Remove qxl support for the 4.3 release

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2013-05-28 at 17:51 +0100, Ian Jackson wrote:
> George Dunlap writes ("[PATCH] libxl: Remove qxl support for the 4.3 
> release"):
> > The qxl drivers for Windows and Linux end up calling instructions
> > that cannot be used for MMIO at the moment.  Just for the 4.3 release,
> > remove qxl support.
> > 
> > This patch should be reverted as soon as the 4.4 development window opens.
> > 
> > The issue in question:
> > 
> > (XEN) emulate.c:88:d18 bad mmio size 16
> > (XEN) io.c:201:d18 MMIO emulation failed @ 0033:7fd2de390430: f3 0f 6f
> > 19 41 83 e8 403
> > 
> > The instruction in question is "movdqu (%rcx),%xmm3".  Xen knows how
> > to emulate it, but unfortunately %xmm3 is 16 bytes long, and the interface
> > between Xen and qemu at the moment would appear to only allow MMIO accesses
> > of 8 bytes.
> > 
> > It's too late in the release cycle to find a fix or a workaround.
> 
> Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>

Also Acked & applied, thanks.



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