KVM: PPC: BOOK3S: PR: Emulate virtual timebase register
virtual time base register is a per VM, per cpu register that needs
to be saved and restored on vm exit and entry. Writing to VTB is not
allowed in the privileged mode.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
[agraf: fix compile error]
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index 671f5c92..d2deb9e 100644
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -125,6 +125,7 @@
* to find the guest purr and spurr value.
*/
vcpu->arch.entry_tb = get_tb();
+ vcpu->arch.entry_vtb = get_vtb();
svcpu->in_use = true;
}
@@ -176,7 +177,7 @@
*/
vcpu->arch.purr += get_tb() - vcpu->arch.entry_tb;
vcpu->arch.spurr += get_tb() - vcpu->arch.entry_tb;
-
+ vcpu->arch.vtb += get_vtb() - vcpu->arch.entry_vtb;
svcpu->in_use = false;
out: