On Mon, 2007-06-25 at 11:32 +0800, Dong, Eddie wrote: > Avi Kivity wrote: > > Dong, Eddie wrote: > > We'll add it as soon as it becomes necessary. But isn't it > > just a memory > > write?
On real HW, yes. The Intel guys can correct me if I am wrong, but I think we can actually simplify this in the virtual-world. My impression from reading the specs is that the address that you write to effectively lets you generate an APIC bus message from a PCI bus-master. The data of the message looks very much like an APIC message, which in turn looks very similar to what you program an IOAPIC pin to map to. Therefore, if you want to generate MSIs I think you can just have the pv-device call kvm_apicbus_send() as opposed to emulating the memory write. I'm not sure if this helps or not (e.g. perhaps we *want* to emulate the bus-master write for supporting some pv-device that wouldn't have access to the KVM_APIC_MSG api for some reason?) ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
