diff options
Diffstat (limited to 'include/qom')
| -rw-r--r-- | include/qom/cpu.h | 102 |
1 files changed, 89 insertions, 13 deletions
diff --git a/include/qom/cpu.h b/include/qom/cpu.h index ce0c406..22b54d6 100644 --- a/include/qom/cpu.h +++ b/include/qom/cpu.h @@ -232,13 +232,8 @@ struct kvm_run; #define TB_JMP_CACHE_SIZE (1 << TB_JMP_CACHE_BITS) /* work queue */ -struct qemu_work_item { - struct qemu_work_item *next; - void (*func)(void *data); - void *data; - int done; - bool free; -}; +typedef void (*run_on_cpu_func)(CPUState *cpu, void *data); +struct qemu_work_item; /** * CPUState: @@ -247,7 +242,9 @@ struct qemu_work_item { * @nr_threads: Number of threads within this CPU. * @numa_node: NUMA node this CPU is belonging to. * @host_tid: Host thread ID. - * @running: #true if CPU is currently running (usermode). + * @running: #true if CPU is currently running (lockless). + * @has_waiter: #true if a CPU is currently waiting for the cpu_exec_end; + * valid under cpu_list_lock. * @created: Indicates whether the CPU thread has been successfully created. * @interrupt_request: Indicates a pending interrupt request. * @halted: Nonzero if the CPU is in suspended state. @@ -257,7 +254,6 @@ struct qemu_work_item { * @crash_occurred: Indicates the OS reported a crash (panic) for this CPU * @tcg_exit_req: Set to force TCG to stop executing linked TBs for this * CPU and return to its top level loop. - * @tb_flushed: Indicates the translation buffer has been flushed. * @singlestep_enabled: Flags for single-stepping. * @icount_extra: Instructions until next timer event. * @icount_decr: Number of cycles left, with interrupt flag in high bit. @@ -301,7 +297,7 @@ struct CPUState { #endif int thread_id; uint32_t host_tid; - bool running; + bool running, has_waiter; struct QemuCond *halt_cond; bool thread_kicked; bool created; @@ -310,7 +306,6 @@ struct CPUState { bool unplug; bool crash_occurred; bool exit_request; - bool tb_flushed; uint32_t interrupt_request; int singlestep_enabled; int64_t icount_extra; @@ -543,6 +538,18 @@ static inline int cpu_asidx_from_attrs(CPUState *cpu, MemTxAttrs attrs) #endif /** + * cpu_list_add: + * @cpu: The CPU to be added to the list of CPUs. + */ +void cpu_list_add(CPUState *cpu); + +/** + * cpu_list_remove: + * @cpu: The CPU to be removed from the list of CPUs. + */ +void cpu_list_remove(CPUState *cpu); + +/** * cpu_reset: * @cpu: The CPU whose state is to be reset. */ @@ -616,6 +623,18 @@ void qemu_cpu_kick(CPUState *cpu); bool cpu_is_stopped(CPUState *cpu); /** + * do_run_on_cpu: + * @cpu: The vCPU to run on. + * @func: The function to be executed. + * @data: Data to pass to the function. + * @mutex: Mutex to release while waiting for @func to run. + * + * Used internally in the implementation of run_on_cpu. + */ +void do_run_on_cpu(CPUState *cpu, run_on_cpu_func func, void *data, + QemuMutex *mutex); + +/** * run_on_cpu: * @cpu: The vCPU to run on. * @func: The function to be executed. @@ -623,7 +642,7 @@ bool cpu_is_stopped(CPUState *cpu); * * Schedules the function @func for execution on the vCPU @cpu. */ -void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data); +void run_on_cpu(CPUState *cpu, run_on_cpu_func func, void *data); /** * async_run_on_cpu: @@ -633,7 +652,21 @@ void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data); * * Schedules the function @func for execution on the vCPU @cpu asynchronously. */ -void async_run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data); +void async_run_on_cpu(CPUState *cpu, run_on_cpu_func func, void *data); + +/** + * async_safe_run_on_cpu: + * @cpu: The vCPU to run on. + * @func: The function to be executed. + * @data: Data to pass to the function. + * + * Schedules the function @func for execution on the vCPU @cpu asynchronously, + * while all other vCPUs are sleeping. + * + * Unlike run_on_cpu and async_run_on_cpu, the function is run outside the + * BQL. + */ +void async_safe_run_on_cpu(CPUState *cpu, run_on_cpu_func func, void *data); /** * qemu_get_cpu: @@ -794,6 +827,49 @@ void cpu_remove(CPUState *cpu); void cpu_remove_sync(CPUState *cpu); /** + * process_queued_cpu_work() - process all items on CPU work queue + * @cpu: The CPU which work queue to process. + */ +void process_queued_cpu_work(CPUState *cpu); + +/** + * cpu_exec_start: + * @cpu: The CPU for the current thread. + * + * Record that a CPU has started execution and can be interrupted with + * cpu_exit. + */ +void cpu_exec_start(CPUState *cpu); + +/** + * cpu_exec_end: + * @cpu: The CPU for the current thread. + * + * Record that a CPU has stopped execution and exclusive sections + * can be executed without interrupting it. + */ +void cpu_exec_end(CPUState *cpu); + +/** + * start_exclusive: + * + * Wait for a concurrent exclusive section to end, and then start + * a section of work that is run while other CPUs are not running + * between cpu_exec_start and cpu_exec_end. CPUs that are running + * cpu_exec are exited immediately. CPUs that call cpu_exec_start + * during the exclusive section go to sleep until this CPU calls + * end_exclusive. + */ +void start_exclusive(void); + +/** + * end_exclusive: + * + * Concludes an exclusive execution section started by start_exclusive. + */ +void end_exclusive(void); + +/** * qemu_init_vcpu: * @cpu: The vCPU to initialize. * |