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-rw-r--r--tcg/tcg.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/tcg/tcg.h b/tcg/tcg.h
index f5d0aed495..df375cf31e 100644
--- a/tcg/tcg.h
+++ b/tcg/tcg.h
@@ -703,6 +703,10 @@ TCGv_i64 tcg_const_local_i64(int64_t val);
* would hit zero midway through it. In this case the next-TB pointer
* returned is the TB we were about to execute, and the caller must
* arrange to execute the remaining count of instructions.
+ * 3: we stopped because the CPU's exit_request flag was set
+ * (usually meaning that there is an interrupt that needs to be
+ * handled). The next-TB pointer returned is the TB we were
+ * about to execute when we noticed the pending exit request.
*
* If the bottom two bits indicate an exit-via-index then the CPU
* state is correctly synchronised and ready for execution of the next
@@ -719,6 +723,7 @@ TCGv_i64 tcg_const_local_i64(int64_t val);
#define TB_EXIT_IDX0 0
#define TB_EXIT_IDX1 1
#define TB_EXIT_ICOUNT_EXPIRED 2
+#define TB_EXIT_REQUESTED 3
#if !defined(tcg_qemu_tb_exec)
# define tcg_qemu_tb_exec(env, tb_ptr) \