Problems using x2apic in Fusion 5.0.2 (900491)

Hi,

I wasn't able to find any place to submit a bug report so I figured I might post it here in the hope that it gets to the right people.

This is with Fusion version 5.0.2 (900491) on Mac OS X 10.6.8 on a Core i5 MBP.

If I allow the guest to use x2apic mode then legacy interrupts routed via the IOAPIC are not being delivered to the guest cpu.

I was able to debug this by making modifications to the guest and it seems that the IOAPIC emulation is treating the destination APIC ID as a 32-bit value if x2apic is enabled (as opposed to using the high 8 bits just like in xAPIC mode). This is not compliant with the x2APIC specification.

The same guest works fine on bare metal Intel Xeon systems as well as other hypervisors.

Please fix this :-)

best

Neel