#include "qemu/bitmap.h"
#include "qemu/queue.h"
#include "qemu/thread.h"
-#include "trace/generated-events.h"
typedef int (*WriteCoreDumpFunction)(const void *buf, size_t size,
void *opaque);
#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:
* @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.
* @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.
#endif
int thread_id;
uint32_t host_tid;
- bool running;
+ bool running, has_waiter;
struct QemuCond *halt_cond;
bool thread_kicked;
bool created;
bool unplug;
bool crash_occurred;
bool exit_request;
- bool tb_flushed;
uint32_t interrupt_request;
int singlestep_enabled;
int64_t icount_extra;
struct KVMState *kvm_state;
struct kvm_run *kvm_run;
- /* Used for events with 'vcpu' and *without* the 'disabled' properties */
- DECLARE_BITMAP(trace_dstate, TRACE_VCPU_EVENT_COUNT);
+ /*
+ * Used for events with 'vcpu' and *without* the 'disabled' properties.
+ * Dynamically allocated based on bitmap requried to hold up to
+ * trace_get_vcpu_event_count() entries.
+ */
+ unsigned long *trace_dstate;
/* TODO Move common fields from CPUArchState here. */
int cpu_index; /* used by alpha TCG */
}
#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.
*/
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.
*
* 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:
*
* 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:
*/
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.
void QEMU_NORETURN cpu_abort(CPUState *cpu, const char *fmt, ...)
GCC_FMT_ATTR(2, 3);
+void cpu_exec_initfn(CPUState *cpu);
void cpu_exec_exit(CPUState *cpu);
#ifdef CONFIG_SOFTMMU
.offset = 0, \
}
+#define UNASSIGNED_CPU_INDEX -1
+
#endif
projects / qemu.git / blobdiff