KVM: PPC E500: Add register l1csr0 emulation

Latest kernel start to access l1csr0 to contron L1.
We just tell guest no operation is on going.

Signed-off-by: Liu Yu <yu.liu@freescale.com>
Acked-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

2 files changed, 7 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/kvm_e500.h b/arch/powerpc/include/asm/kvm_e500.h
index 9d497ce49726..569dfd31ee79 100644
--- a/arch/powerpc/include/asm/kvm_e500.h
+++ b/arch/powerpc/include/asm/kvm_e500.h
@@ -52,6 +52,7 @@ struct kvmppc_vcpu_e500 {
         u32 mas5;
         u32 mas6;
         u32 mas7;
+        u32 l1csr0;
         u32 l1csr1;
         u32 hid0;
         u32 hid1;
diff --git a/arch/powerpc/kvm/e500_emulate.c b/arch/powerpc/kvm/e500_emulate.c
index 7644f7a9bac3..95f8ec8fdc71 100644
--- a/arch/powerpc/kvm/e500_emulate.c
+++ b/arch/powerpc/kvm/e500_emulate.c
@@ -99,6 +99,10 @@ int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
                 vcpu_e500->mas6 = spr_val; break;
         case SPRN_MAS7:
                 vcpu_e500->mas7 = spr_val; break;
+        case SPRN_L1CSR0:
+                vcpu_e500->l1csr0 = spr_val;
+                vcpu_e500->l1csr0 &= ~(L1CSR0_DCFI | L1CSR0_CLFC);
+                break;
         case SPRN_L1CSR1:
                 vcpu_e500->l1csr1 = spr_val; break;
         case SPRN_HID0:
@@ -179,6 +183,8 @@ int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
                 break;
         }
 
+        case SPRN_L1CSR0:
+                kvmppc_set_gpr(vcpu, rt, vcpu_e500->l1csr0); break;
         case SPRN_L1CSR1:
                 kvmppc_set_gpr(vcpu, rt, vcpu_e500->l1csr1); break;
         case SPRN_HID0: