Re: [Xen-users] spice issue

[Wei Liu <wei.liu2@xxxxxxxxxx>]

Add back xen-users.

On Mon, Oct 14, 2013 at 11:45:01AM -0600, jacek burghardt wrote:
> Everywere I see  in info about 4.3 xen "here's also been
> work<http://www.phoronix.com/scan.php?page=news_item&px=MTI5OTg#> on
> the libvirt libxl driver, VTPM enhancements, and QXL SPICE support for
> using the QXL 3D SPICE framework. "
> 

Unfortunately we finally removed support of QXL in 4.3 release, I
think it's still an open work item.

commit 5479961ab55e118b8c80db7724721e78743363c7
Author: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
Date:   Fri May 24 16:20:59 2013 +0100

    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.
    
    Signed-off-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
    Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
    Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>

I vaguely remember there's some action taken to fix this, but I might be
wrong.

If you think it's so important, make an argument on Xen-devel and we
will see what we can do.

> 
> On Mon, Oct 14, 2013 at 11:42 AM, jacek burghardt <jaceksburghardt@xxxxxxxxx
> > wrote:
> 
> > Well xen had been working with spice for last two years. So it is importan
> > feature as it is more secured than vnc. I hope someone can help me figure
> > out why it does not work.
> >

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