diff options
Diffstat (limited to 'include/hw/core')
| -rw-r--r-- | include/hw/core/cpu.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h index 8b57bcd92c..338757e525 100644 --- a/include/hw/core/cpu.h +++ b/include/hw/core/cpu.h @@ -422,6 +422,15 @@ struct qemu_work_item; * valid under cpu_list_lock. * @created: Indicates whether the CPU thread has been successfully created. * @halt_cond: condition variable sleeping threads can wait on. + * @exit_request: Another thread requests the CPU to call qemu_wait_io_event(). + * Should be read only by CPU thread with load-acquire, to synchronize with + * other threads' store-release operation. + * + * In some cases, accelerator-specific code will write exit_request from + * within the same thread, to "bump" the effect of qemu_cpu_kick() to + * the one provided by cpu_exit(), especially when processing interrupt + * flags. In this case, the write and read happen in the same thread + * and the write therefore can use qemu_atomic_set(). * @interrupt_request: Indicates a pending interrupt request. * Only used by system emulation. * @halted: Nonzero if the CPU is in suspended state. |