diff options
Diffstat (limited to 'include/exec/cpu-common.h')
| -rw-r--r-- | include/exec/cpu-common.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h index 638dc80..0cf9a3d 100644 --- a/include/exec/cpu-common.h +++ b/include/exec/cpu-common.h @@ -186,6 +186,7 @@ int cpu_memory_rw_debug(CPUState *cpu, vaddr addr, void list_cpus(void); #ifdef CONFIG_TCG +#include "qemu/atomic.h" bool tcg_cflags_has(CPUState *cpu, uint32_t flags); void tcg_cflags_set(CPUState *cpu, uint32_t flags); @@ -218,6 +219,23 @@ bool cpu_unwind_state_data(CPUState *cpu, uintptr_t host_pc, uint64_t *data); */ bool cpu_restore_state(CPUState *cpu, uintptr_t host_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)qatomic_read(&cpu->neg.icount_decr.u32) < 0; +} + G_NORETURN void cpu_loop_exit_noexc(CPUState *cpu); G_NORETURN void cpu_loop_exit_atomic(CPUState *cpu, uintptr_t pc); #endif /* CONFIG_TCG */ |