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[Xen-devel] Bug when disabling/enabling a PT device with MSI enabled
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | [Xen-devel] Bug when disabling/enabling a PT device with MSI enabled |
| From: | Tom Rotenberg <tom.rotenberg@xxxxxxxxx> |
| Date: | Tue, 24 Nov 2009 20:42:49 +0200 |
| Delivery-date: | Tue, 24 Nov 2009 10:43:15 -0800 |
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Hi, I am using the xen-3,4, and i am doing pass-through for a device with MSI enabled (the device of-course supports MSI) to a domU with Windows XP. When i disable and then re-enable the device using Windows device manager, everything looks like it's working fine, but the device seems to malfunction. After digging a little bit, i saw that the problem is, because the bit of the interrupt-status (bit 3) in the status register (offset 0x6 in the PCI config space) was turned on somehow - this proibably caused the MSI to malfunction (because the IntX assertion was enabled - thus disabling the MSI) - and this lead to the problem i experienced. Any ideas on how to solve this issue? Tom _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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