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Re: [Xen-devel] [PATCH] [Xen 3.3] Containing MSI errors in msi emulation

To: "Shan, Haitao" <haitao.shan@xxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] [Xen 3.3] Containing MSI errors in msi emulation code in QEMU
From: "Haitao Shan" <maillists.shan@xxxxxxxxx>
Date: Wed, 26 Nov 2008 10:47:49 +0800
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
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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.

Shan Haitao

2008/11/12 Shan, Haitao <haitao.shan@xxxxxxxxx>:
> 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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