target-s390x: fix s390_cpu_initial_reset

The s390_cpu_initial_reset function zeroes a big part of the CPU state
structure, including CPU_COMMON, and thus the QEMU TLB structure. As
they should not be initialized with zeroes only, we need to call the
tlb_flush to initialize it correctly.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Alexander Graf <agraf@suse.de>

target-s390x/cpu.c

@@ -131,6 +131,7 @@ static void s390_cpu_initial_reset(CPUState *s)
     if (kvm_enabled()) {
         kvm_s390_reset_vcpu(cpu);
     }
+    tlb_flush(s, 1);
 }
 
 /* CPUClass:reset() */