[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Re: Possible regression in "passthough: add no_wb option for pci conf write"
On Mon, 2009-12-07 at 10:55 +0800, Simon Horman wrote: > On Mon, Dec 07, 2009 at 10:16:40AM +0800, Qing He wrote: > > On Sun, 2009-12-06 at 13:55 +0800, Simon Horman wrote: > > > > passthough: add no_wb option for pci conf write > > > > > > > > Current pt_pci_write_config always writes back to real pci conf > > > > space. However, in the case of MSI address and data registers, > > > > if guest changes the affinity of the interrupt, stale data will > > > > be written to these registers. This is particularly a problem > > > > if Xen uses per-CPU vector, where the interrupt in question fails > > > > to work. This patch fixes this by adding an option to disable the > > > > write back of certain controls. > > > > > > This patch seems to cause the creation of passing a domain > > > to fail when passing through either an intel 82576 or 82572EI. > > > I didn't try any others. > > > > > > > Hi Simon, > > Do you notice anything unusual in the ioemu and hypervisor logs? > > I couldn't see anything of particular note. I'll try and poke a bit harder. > Thank you, I'll also try at my side. What's your configuration? On what changeset are you experiencing this? Thanks, Qing _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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