On 11/17/21 05:52, Nakajima, Jun wrote:
If a (creative) guest wants to set XFD[AMX] = 1 for fun while keeping AMX state alive without saving the AXM state, it may lose the state after VM exit/entry.
I think this should not happen, unless you also document that other random events (hypothetically, it could be some other core using AMX?) can cause the loss of XTILEDATA if XFD[AMX]=1. Virtualization should not be special, I'd prefer that the guest has the same behavior as bare metal in this respect.
Paolo
