Xen devel - Nov 2008 - [PATCH] [Xen 3.3] Containing MSI errors in msi emulation code in QEMU

Hi, Keir,

We found one problem related to MSI in Xen 3.3. If msi=0 is specified and guest
want to enable msi, qemu finds it can not enable it and quits. This problem is
not appicable for xen unstable since the "msi=x" switch is removed.
My patch let these cases be handled inside msi emulation code. If qemu can not
enable msi, guest will not receive MSI. But Qemu can still go on. But if guest
driver does not test MSI''s functionality, guest device will stop to
function.
Could you please apply the patch?

Best Regards
Haitao Shan


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Hi, Keir,

Could you please apply this patch to qemu-xen3.3 tree? It is in the
in-tree qemu now. But qemu remote does not have this checked in.
Thanks!

Shan Haitao

2008/11/12 Shan, Haitao <haitao.shan@intel.com>:
> Hi, Keir,
>
> We found one problem related to MSI in Xen 3.3. If msi=0 is specified and
guest want to enable msi, qemu finds it can not enable it and quits. This
problem is not appicable for xen unstable since the "msi=x" switch is
removed.
> My patch let these cases be handled inside msi emulation code. If qemu can
not enable msi, guest will not receive MSI. But Qemu can still go on. But if
guest driver does not test MSI''s functionality, guest device will stop
to function.
> Could you please apply the patch?
>
> Best Regards
> Haitao Shan
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
>
>
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Sorry, forgot the patch in my last mail.


---------- Forwarded message ----------
From: Shan, Haitao <haitao.shan@intel.com>
Date: 2008/11/12
Subject: [Xen-devel] [PATCH] [Xen 3.3] Containing MSI errors in msi
emulation code in QEMU
To: Keir Fraser <keir.fraser@eu.citrix.com>
抄送： "xen-devel@lists.xensource.com"
<xen-devel@lists.xensource.com>


Hi, Keir,

We found one problem related to MSI in Xen 3.3. If msi=0 is specified
and guest want to enable msi, qemu finds it can not enable it and
quits. This problem is not appicable for xen unstable since the
"msi=x" switch is removed.
My patch let these cases be handled inside msi emulation code. If qemu
can not enable msi, guest will not receive MSI. But Qemu can still go
on. But if guest driver does not test MSI's functionality, guest
device will stop to function.
Could you please apply the patch?

Best Regards
Haitao Shan

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel


_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel