From 52b2519c4ea9a6aa4df7abfe35fd1755c5c8546c Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Tue, 7 Jun 2016 17:39:38 +0200
Subject: [PATCH] ppc: Provide function to get CPU class of the host CPU

When running with KVM, we might be interested in some details
of the host CPU class, too, so provide a function to get the
corresponding CPU class.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 target-ppc/kvm.c     | 19 ++++++++++++++-----
 target-ppc/kvm_ppc.h |  7 +++++++
 2 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index 24d6032007..6c153611c0 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -2329,6 +2329,19 @@ static PowerPCCPUClass *ppc_cpu_get_family_class(PowerPCCPUClass *pcc)
     return POWERPC_CPU_CLASS(oc);
 }
 
+PowerPCCPUClass *kvm_ppc_get_host_cpu_class(void)
+{
+    uint32_t host_pvr = mfpvr();
+    PowerPCCPUClass *pvr_pcc;
+
+    pvr_pcc = ppc_cpu_class_by_pvr(host_pvr);
+    if (pvr_pcc == NULL) {
+        pvr_pcc = ppc_cpu_class_by_pvr_mask(host_pvr);
+    }
+
+    return pvr_pcc;
+}
+
 static int kvm_ppc_register_host_cpu_type(void)
 {
     TypeInfo type_info = {
@@ -2336,14 +2349,10 @@ static int kvm_ppc_register_host_cpu_type(void)
         .instance_init = kvmppc_host_cpu_initfn,
         .class_init = kvmppc_host_cpu_class_init,
     };
-    uint32_t host_pvr = mfpvr();
     PowerPCCPUClass *pvr_pcc;
     DeviceClass *dc;
 
-    pvr_pcc = ppc_cpu_class_by_pvr(host_pvr);
-    if (pvr_pcc == NULL) {
-        pvr_pcc = ppc_cpu_class_by_pvr_mask(host_pvr);
-    }
+    pvr_pcc = kvm_ppc_get_host_cpu_class();
     if (pvr_pcc == NULL) {
         return -1;
     }
diff --git a/target-ppc/kvm_ppc.h b/target-ppc/kvm_ppc.h
index 3b2090e42e..20bfb59b1a 100644
--- a/target-ppc/kvm_ppc.h
+++ b/target-ppc/kvm_ppc.h
@@ -56,6 +56,7 @@ void kvmppc_hash64_write_pte(CPUPPCState *env, target_ulong pte_index,
 bool kvmppc_has_cap_fixup_hcalls(void);
 int kvmppc_enable_hwrng(void);
 int kvmppc_put_books_sregs(PowerPCCPU *cpu);
+PowerPCCPUClass *kvm_ppc_get_host_cpu_class(void);
 
 #else
 
@@ -252,6 +253,12 @@ static inline int kvmppc_put_books_sregs(PowerPCCPU *cpu)
 {
     abort();
 }
+
+static inline PowerPCCPUClass *kvm_ppc_get_host_cpu_class(void)
+{
+    return NULL;
+}
+
 #endif
 
 #ifndef CONFIG_KVM