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>

diff --git a/arch/powerpc/kvm/book3s_emulate.c b/arch/powerpc/kvm/book3s_emulate.c
index bf0ddcd98bcc7d618cf800e147f13f715921b4ec..0c9dc62532d02c78c2480d569fc014cb637713b1 100644 (file)
--- 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: