[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [Query] Flow of PCI device dedicated to a domU
On Wed, Jul 16, 2014 at 11:42:05AM +0530, Xenbegn developer wrote: > Hi, > I am trying to understand the flow of how a PCI device driver in domU works > after a PCI device is is assigned to a domU. And by domU do you mean PV or HVM? > > a) If a PCI device is assigned to a domU, this device has to be on a PCI > bus. So as per my view xen would have to somehow provide a PCI Controller > on which this device is attached. > => Is my assumption correct ? If yes how it is done, No then also How > enumeration of this device happens in domU kernel > > b) Is the Configuration space of the PCI device directly accessible to the > domU (assuming the kernel accesses it using memory map) ? If not then it is > trapped by xen > > c) Who assigns the MSI (addr + value) in the PCI device. If Xen then how > Xen does a translation from Physical MSI to guest MSI (where in code) > > Please help me with these doubts > > > Regards > Manish > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxx > http://lists.xen.org/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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