commit c028dd6bb648251b773f900f59e53544278b3b3c
author Radim Krčmář <rkrcmar@redhat.com> Fri May 22 19:22:10 2015 +0200
committer Paolo Bonzini <pbonzini@redhat.com> Thu May 28 10:43:36 2015 +0200
tree 719aa8e5f1e8d6ef4545cfbed953da92c77ee461
parent 257b9a5faab5849fa61f1a523b429dc279d33cc3

KVM: x86: preserve x2APIC LDR on INIT

Logical x2APIC stops working if we rewrite it with zeros.
The best references are SDM April 2015: 10.12.10.1 Logical Destination
Mode in x2APIC Mode

  [...], the LDR are initialized by hardware based on the value of
  x2APIC ID upon x2APIC state transitions.

and SDM April 2015: 10.12.10.2 Deriving Logical x2APIC ID from the Local
x2APIC ID

  The LDR initialization occurs whenever the x2APIC mode is enabled

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>