[PATCH] target/nios2: Use gen_io_start/end around wrctl instruction.

[wentongw]

From: Wentong Wu <wentong.wu@intel.com>

wrctl instruction on nios2 target will cause checking cpu interrupt,
but tcg_handle_interrupt() will call cpu_abort() if the CPU gets an
interrupt while it's not in a 'can do IO' state, so around wrctl
instruction add gen_io_start/end.

Signed-off-by: Wentong Wu <wentong.wu@intel.com>
---
 target/nios2/translate.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/target/nios2/translate.c b/target/nios2/translate.c
index e17656e6..deaefcaf 100644
--- a/target/nios2/translate.c
+++ b/target/nios2/translate.c
@@ -32,6 +32,7 @@
 #include "exec/cpu_ldst.h"
 #include "exec/translator.h"
 #include "qemu/qemu-print.h"
+#include "exec/gen-icount.h"
 
 /* is_jmp field values */
 #define DISAS_JUMP    DISAS_TARGET_0 /* only pc was modified dynamically */
@@ -518,7 +519,13 @@ static void wrctl(DisasContext *dc, uint32_t code, 
uint32_t flags)
     /* If interrupts were enabled using WRCTL, trigger them. */
 #if !defined(CONFIG_USER_ONLY)
     if ((instr.imm5 + CR_BASE) == CR_STATUS) {
+        if (tb_cflags(dc->tb) & CF_USE_ICOUNT) {
+            gen_io_start();
+        }
         gen_helper_check_interrupts(dc->cpu_env);
+        if (tb_cflags(dc->tb) & CF_USE_ICOUNT) {
+            gen_io_end();
+        }
     }
 #endif
 }
-- 
2.21.3