KVM: PPC: Extract MMU init

The host shadow mmu code needs to get initialized. It needs to fetch a
segment it can use to put shadow PTEs into.

That initialization code was in generic code, which is icky. Let's move
it over to the respective MMU file.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>

3 files changed, 20 insertions, 7 deletions

diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h
index edade847b8f8..18d139ec2d22 100644
--- a/arch/powerpc/include/asm/kvm_ppc.h
+++ b/arch/powerpc/include/asm/kvm_ppc.h
@@ -69,6 +69,7 @@ extern void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gpa_t gpaddr,
 extern void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode);
 extern void kvmppc_mmu_switch_pid(struct kvm_vcpu *vcpu, u32 pid);
 extern void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu);
+extern int kvmppc_mmu_init(struct kvm_vcpu *vcpu);
 extern int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
 extern int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
 extern gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int gtlb_index,
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index 7ff80f9f13a8..d0986968a611 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -1202,14 +1202,9 @@ struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
 
         vcpu->arch.shadow_msr = MSR_USER64;
 
-        err = __init_new_context();
+        err = kvmppc_mmu_init(vcpu);
         if (err < 0)
                 goto free_shadow_vcpu;
-        vcpu_book3s->context_id = err;
-
-        vcpu_book3s->vsid_max = ((vcpu_book3s->context_id + 1) << USER_ESID_BITS) - 1;
-        vcpu_book3s->vsid_first = vcpu_book3s->context_id << USER_ESID_BITS;
-        vcpu_book3s->vsid_next = vcpu_book3s->vsid_first;
 
         return vcpu;
 
@@ -1225,7 +1220,6 @@ void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
 {
         struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
 
-        __destroy_context(vcpu_book3s->context_id);
         kvm_vcpu_uninit(vcpu);
         kfree(vcpu_book3s->shadow_vcpu);
         vfree(vcpu_book3s);
diff --git a/arch/powerpc/kvm/book3s_64_mmu_host.c b/arch/powerpc/kvm/book3s_64_mmu_host.c
index b0f5b4edaec2..0eea589dbef0 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_host.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_host.c
@@ -405,4 +405,22 @@ void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu)
 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
 {
         kvmppc_mmu_pte_flush(vcpu, 0, 0);
+        __destroy_context(to_book3s(vcpu)->context_id);
+}
+
+int kvmppc_mmu_init(struct kvm_vcpu *vcpu)
+{
+        struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
+        int err;
+
+        err = __init_new_context();
+        if (err < 0)
+                return -1;
+        vcpu3s->context_id = err;
+
+        vcpu3s->vsid_max = ((vcpu3s->context_id + 1) << USER_ESID_BITS) - 1;
+        vcpu3s->vsid_first = vcpu3s->context_id << USER_ESID_BITS;
+        vcpu3s->vsid_next = vcpu3s->vsid_first;
+
+        return 0;
 }