KVM: PPC: Stub emulate CFAR and PURR SPRs

Recent Linux versions use the CFAR and PURR SPRs, but don't really care about
their contents (yet). So for now, we can simply return 0 when the guest wants
to read them.

Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/powerpc/kvm/book3s_emulate.c b/arch/powerpc/kvm/book3s_emulate.c
index bf0ddcd98bcc..0c9dc62532d0 100644
--- a/arch/powerpc/kvm/book3s_emulate.c
+++ b/arch/powerpc/kvm/book3s_emulate.c
@@ -473,6 +473,10 @@ int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
         case SPRN_HID5:
                 kvmppc_set_gpr(vcpu, rt, to_book3s(vcpu)->hid[5]);
                 break;
+        case SPRN_CFAR:
+        case SPRN_PURR:
+                kvmppc_set_gpr(vcpu, rt, 0);
+                break;
         case SPRN_GQR0:
         case SPRN_GQR1:
         case SPRN_GQR2: