I was enabling VT-d in Xen and noticed that there is some weirdness in the associated ACPI tables. This is on a Dell T7400 (Seaburg based). Basically, the Device Scope structures in the DRHD tables do not seem to be initialized according to specs. More precisely, the ''Path'' field of the structure contains the device and functions numbers, but the device part is left-shifted by three bits (i.e., multiplied by 8). This causes incorrect devices to be identified. The device scope structure for the RMRR tables, on the other hand, do get properly initialized according the the VT-d specs. I''m not aware of anyone else having VT-d support, so I''m asking the question here hoping that someone with some more inside knowledge can enlighten me: Have anyone else experienced similar problems? Are there any updates to the September 2007 (Rev 1.1) spec that I am not aware of? eSk _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel