KVM: ignore reads from AMDs C1E enabled MSR
commit866b5a4dc9682101678d42071378a168744b15b0
authorAndre Przywara <andre.przywara@amd.com>
Wed, 24 Jun 2009 10:44:34 +0000 (24 12:44 +0200)
committerGreg Kroah-Hartman <gregkh@suse.de>
Tue, 10 Nov 2009 00:21:50 +0000 (9 16:21 -0800)
tree7203dc174e1022ecf9a8e0e3a73c2b8b3d899400
parentc66415b2216cebf6625a2ab01c347a2fc329671a
KVM: ignore reads from AMDs C1E enabled MSR

commit 1fdbd48c242db996107f72ae4140ffe8163e26a8 upstream.

If the Linux kernel detects an C1E capable AMD processor (K8 RevF and
higher), it will access a certain MSR on every attempt to go to halt.
Explicitly handle this read and return 0 to let KVM run a Linux guest
with the native AMD host CPU propagated to the guest.

Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
arch/x86/kvm/x86.c