diff options
Diffstat (limited to 'include/exec')
| -rw-r--r-- | include/exec/exec-all.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h index 49db07ba0b..04795c49bf 100644 --- a/include/exec/exec-all.h +++ b/include/exec/exec-all.h @@ -72,6 +72,23 @@ void QEMU_NORETURN cpu_loop_exit(CPUState *cpu); void QEMU_NORETURN cpu_loop_exit_restore(CPUState *cpu, uintptr_t pc); void QEMU_NORETURN cpu_loop_exit_atomic(CPUState *cpu, uintptr_t pc); +/** + * cpu_loop_exit_requested: + * @cpu: The CPU state to be tested + * + * Indicate if somebody asked for a return of the CPU to the main loop + * (e.g., via cpu_exit() or cpu_interrupt()). + * + * This is helpful for architectures that support interruptible + * instructions. After writing back all state to registers/memory, this + * call can be used to check if it makes sense to return to the main loop + * or to continue executing the interruptible instruction. + */ +static inline bool cpu_loop_exit_requested(CPUState *cpu) +{ + return (int32_t)atomic_read(&cpu_neg(cpu)->icount_decr.u32) < 0; +} + #if !defined(CONFIG_USER_ONLY) void cpu_reloading_memory_map(void); /** |