target-ppc: initialize MSR appropriately in user-mode

Mask the initial MSR with the mask from the PowerPC CPU definition.

Noticed by Nathan Froyd.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5964 c046a42c-6fe2-441c-8c8c-71466251a162

target-ppc/helper.c

@@ -2904,12 +2904,12 @@ void cpu_ppc_reset (void *opaque)
 #if defined(CONFIG_USER_ONLY)
     msr |= (target_ulong)1 << MSR_FP; /* Allow floating point usage */
     msr |= (target_ulong)1 << MSR_PR;
+    env->msr = msr & env->msr_mask;
 #else
     env->nip = env->hreset_vector | env->excp_prefix;
     if (env->mmu_model != POWERPC_MMU_REAL)
         ppc_tlb_invalidate_all(env);
 #endif
-    env->msr = msr;
     hreg_compute_hflags(env);
     env->reserve = (target_ulong)-1ULL;
     /* Be sure no exception or interrupt is pending */