On Wed, Jun 10, 2009 at 12:19:42AM +0100, Paul Brook wrote: > On Monday 25 May 2009, Michael S. Tsirkin wrote: > > Add functions implementing MSI-X support. First user will be virtio-pci. > > Note that platform must set a flag to declare MSI supported. > > For PC this will be set by APIC. > > This sounds wrong. The device shouldn't know or care whether the system has a > MSI capable interrupt controller. That's for the guest OS to figure out. > > Paul You are right of course. In theory there's nothing that breaks if I set this flag to on, on all platforms. OTOH if qemu emulates some controller incorrectly, guest might misdetect MSI support in the controller, and things will break horribly. It seems safer to have a flag that can be enabled by people that know about a specific platform. What do you think? -- MST -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
