On 10.01.2025 15:01, Roger Pau Monne wrote: > The PCI segment value is limited to 16 bits, however there are buses like VMD > that fake being part of the PCI topology by adding segment with a number > outside the scope of the PCI firmware specification range (>= 0x10000). The > MCFG ACPI Table "PCI Segment Group Number" field is defined as having a 16 bit > width. > > Attempting to register or manage those devices with Xen would result in errors > at best, or overlaps with existing devices living on the truncated equivalent > segment values. > > Skip notifying Xen about those devices.
Hmm, is simply omitting the notification really all it takes? How would Xen manage MSI / MSI-X, for example, without knowing of the device? As per the BoF on the summit in Prague(?), I continue to think we need partial driver logic in Xen for VMD ... Jan
