KVM: ppc: Add emulation of E500 register mmucsr0

Latest kernel flushes TLB via mmucsr0.
Signed-off-by: Liu Yu <yu.liu@freescale.com>
Acked-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

arch/powerpc/kvm/e500_emulate.c

@@ -105,6 +105,11 @@ int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
 	case SPRN_HID1:
 		vcpu_e500->hid1 = vcpu->arch.gpr[rs]; break;
 
+	case SPRN_MMUCSR0:
+		emulated = kvmppc_e500_emul_mt_mmucsr0(vcpu_e500,
+				vcpu->arch.gpr[rs]);
+		break;
+
 	/* extra exceptions */
 	case SPRN_IVOR32:
 		vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL] = vcpu->arch.gpr[rs];
@@ -172,6 +177,9 @@ int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
 	case SPRN_HID1:
 		vcpu->arch.gpr[rt] = vcpu_e500->hid1; break;
 
+	case SPRN_MMUCSR0:
+		vcpu->arch.gpr[rt] = 0; break;
+
 	/* extra exceptions */
 	case SPRN_IVOR32:
 		vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL];

arch/powerpc/kvm/e500_tlb.c

@@ -391,6 +391,22 @@ static int kvmppc_e500_gtlbe_invalidate(struct kvmppc_vcpu_e500 *vcpu_e500,
 	return 0;
 }
 
+int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500, ulong value)
+{
+	int esel;
+
+	if (value & MMUCSR0_TLB0FI)
+		for (esel = 0; esel < vcpu_e500->guest_tlb_size[0]; esel++)
+			kvmppc_e500_gtlbe_invalidate(vcpu_e500, 0, esel);
+	if (value & MMUCSR0_TLB1FI)
+		for (esel = 0; esel < vcpu_e500->guest_tlb_size[1]; esel++)
+			kvmppc_e500_gtlbe_invalidate(vcpu_e500, 1, esel);
+
+	_tlbil_all();
+
+	return EMULATE_DONE;
+}
+
 int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb)
 {
 	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);

arch/powerpc/kvm/e500_tlb.h

@@ -44,6 +44,7 @@
 	   | E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK)
 
 extern void kvmppc_dump_tlbs(struct kvm_vcpu *);
+extern int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *, ulong);
 extern int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *);
 extern int kvmppc_e500_emul_tlbre(struct kvm_vcpu *);
 extern int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *, int, int);