[Qemu-devel] [PATCH 3/3] monitor: add ability to dump SLB entries

[David Gibson <david@gibson.dropbear.id.au>]

From: Nishanth Aravamudan <nacc@us.ibm.com>

When run with a PPC Book3S (server) CPU Currently 'info tlb' in the
qemu monitor reports "dump_mmu: unimplemented".  However, during
bringup work, it can be quite handy to have the SLB entries, which are
available in the CPUPPCState.  This patch adds an implementation of
info tlb for book3s, which dumps the SLB.

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 target-ppc/helper.c |   32 +++++++++++++++++++++++++++-----
 1 files changed, 27 insertions(+), 5 deletions(-)

diff --git a/target-ppc/helper.c b/target-ppc/helper.c
index 137a494..29c7050 100644
--- a/target-ppc/helper.c
+++ b/target-ppc/helper.c
@@ -1545,14 +1545,36 @@ static void mmubooke206_dump_mmu(FILE *f, fprintf_function cpu_fprintf,
     }
 }
 
+static void mmubooks_dump_mmu(FILE *f, fprintf_function cpu_fprintf,
+                              CPUState *env)
+{
+    int i;
+    uint64_t slbe, slbv;
+
+    cpu_synchronize_state(env);
+
+    cpu_fprintf(f, "SLB\tESID\t\t\tVSID\n");
+    for (i = 0; i < env->slb_nr; i++) {
+        slbe = env->slb[i].esid;
+        slbv = env->slb[i].vsid;
+        if (slbe == 0 && slbv == 0) {
+            continue;
+        }
+        cpu_fprintf(f, "%d\t0x%016" PRIx64 "\t0x%016" PRIx64 "\n",
+                    i, slbe, slbv);
+    }
+}
+
 void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUState *env)
 {
-    switch (env->mmu_model) {
-    case POWERPC_MMU_BOOKE206:
+    if (env->mmu_model == POWERPC_MMU_BOOKE206) {
         mmubooke206_dump_mmu(f, cpu_fprintf, env);
-        break;
-    default:
-        cpu_fprintf(f, "%s: unimplemented\n", __func__);
+    } else {
+        if ((env->mmu_model & POWERPC_MMU_64B) != 0) {
+            mmubooks_dump_mmu(f, cpu_fprintf, env);
+        } else {
+            cpu_fprintf(f, "%s: unimplemented\n", __func__);
+        }
     }
 }
 
-- 
1.7.7