[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Bug when disabling/enabling a PT device with MSI enabled
On Tue, Nov 24, 2009 at 08:42:49PM +0200, Tom Rotenberg wrote: > 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? Looks like QEMU is not doing its job. It ought to be tracking when an MSI devices transforms to a INTx PCI device (and vice-versa) and make the appropiate Xen calls. Look in ioemu-dir/hw/pass-through.c _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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