KVM: x86: Explicitly track all possibilities for APIC map's logical modes
Track all possibilities for the optimized APIC map's logical modes
instead of overloading the pseudo-bitmap and treating any "unknown" value
as "invalid".
As documented by the now-stale comment above the mode values, the values
did have meaning when the optimized map was originally added. That
dependent logical was removed by commit
e45115b62f9a ("KVM: x86: use
physical LAPIC array for logical x2APIC"), but the obfuscated behavior
and its comment were left behind.
Opportunistically rename "mode" to "logical_mode", partly to make it
clear that the "disabled" case applies only to the logical map, but also
to prove that there is no lurking code that expects "mode" to be a bitmap.
Functionally, this is a glorified nop.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <
20230106011306.85230-19-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>