[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Re: [PATCH] xen: fix interrupt routing
On 06/15/2011 11:24 AM, Alexander Graf wrote: I'm actually not quite sure what exactly he's describing here. But if it's bypassing the bus logic, it's not a normal PCI device :). Sure, there are special case devices that also expose a PCI interface. But real PCI cards that you plug in onto the PCI bus can't bypass the interrupt logic of the bus, as the only interrupt wires they have go to the bus. And since the PCI adapters we use in PC machines in Qemu are all non-special, guests can possibly choke on this. There actually is a special device in qemu - acpi power management is configured as a PCI device, but its interrupt is hard-wired to gsi 9 and is edge-triggered (so it can't share the irq line). I other devices that are special in this regard to also be part of the chipset, not devices you can plug into arbitrary slots. -- error compiling committee.c: too many arguments to function _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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