KVM: PPC: Fix ONE_REG AltiVec support

[ Upstream commit b4d7f161feb3015d6306e1d35b565c888ff70c9d ]

The get and set operations got exchanged by mistake when moving the
code from book3s.c to powerpc.c.

Fixes: 3840edc8033ad5b86deee309c1c321ca54257452
Cc: stable@vger.kernel.org # 3.18+
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index ac3ddf1..c8fe9ab 100644 (file)
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -915,21 +915,17 @@ int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
                                r = -ENXIO;
                                break;
                        }
-                       vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
+                       val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
                        break;
                case KVM_REG_PPC_VSCR:
                        if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
                                r = -ENXIO;
                                break;
                        }
-                       vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
+                       val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
                        break;
                case KVM_REG_PPC_VRSAVE:
-                       if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
-                               r = -ENXIO;
-                               break;
-                       }
-                       vcpu->arch.vrsave = set_reg_val(reg->id, val);
+                       val = get_reg_val(reg->id, vcpu->arch.vrsave);
                        break;
 #endif /* CONFIG_ALTIVEC */
                default:
@@ -970,17 +966,21 @@ int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
                                r = -ENXIO;
                                break;
                        }
-                       val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
+                       vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
                        break;
                case KVM_REG_PPC_VSCR:
                        if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
                                r = -ENXIO;
                                break;
                        }
-                       val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
+                       vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
                        break;
                case KVM_REG_PPC_VRSAVE:
-                       val = get_reg_val(reg->id, vcpu->arch.vrsave);
+                       if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
+                               r = -ENXIO;
+                               break;
+                       }
+                       vcpu->arch.vrsave = set_reg_val(reg->id, val);
                        break;
 #endif /* CONFIG_ALTIVEC */
                default: