This patch enables directed EOI on latest processor. With this, the broadcast of EOI would be suppressed upon LAPIC EOI, so VMM is required to perform a directed EOI to the IOxAPIC generating the interrupt by writting to its EOI register.(Pls. refer SDM 3A 10.5.5) This is useful for ioapic_ack_old to avoid the spurious interrupt storm, which is the reason why ioapic_ack_new is used. Signed-Off-By: Zhai Edwin <edwin.zhai@intel.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel