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[Xen-devel] [PATCH] [Xen 3.3] Containing MSI errors in msi emulation cod
| To: | 'Keir Fraser' <keir.fraser@xxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [PATCH] [Xen 3.3] Containing MSI errors in msi emulation code in QEMU |
| From: | "Shan, Haitao" <haitao.shan@xxxxxxxxx> |
| Date: | Wed, 12 Nov 2008 14:09:51 +0800 |
| Accept-language: | en-US |
| Acceptlanguage: | en-US |
| Cc: | "'xen-devel@xxxxxxxxxxxxxxxxxxx'" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Tue, 11 Nov 2008 22:10:31 -0800 |
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| Thread-index: | AclEjUYKwczGwfLZTJWoS0vAeV4fUw== |
| Thread-topic: | [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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