This patch fixes processing of rfi instructions in icount mode.

In this mode writing to interrupt/peripheral state is controlled
by can_do_io flag. This flag must be set explicitly before helper
function invocation.
Signed-off-by: NMaria Klimushenkova <maria.klimushenkova@ispras.ru>
Signed-off-by: NPavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Tested-by: NMark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

target/ppc/translate.c

@@ -3919,9 +3919,15 @@ static void gen_rfi(DisasContext *ctx)
     }
     /* Restore CPU state */
     CHK_SV;
+    if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
+        gen_io_start();
+    }
     gen_update_cfar(ctx, ctx->base.pc_next - 4);
     gen_helper_rfi(cpu_env);
     gen_sync_exception(ctx);
+    if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
+        gen_io_end();
+    }
 #endif
 }
 
@@ -3933,9 +3939,15 @@ static void gen_rfid(DisasContext *ctx)
 #else
     /* Restore CPU state */
     CHK_SV;
+    if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
+        gen_io_start();
+    }
     gen_update_cfar(ctx, ctx->base.pc_next - 4);
     gen_helper_rfid(cpu_env);
     gen_sync_exception(ctx);
+    if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
+        gen_io_end();
+    }
 #endif
 }