| Message ID | 20181025144644.15464-2-cota@braap.org |
|---|---|
| State | New |
| Headers | show |
| Series | [RFC,v4,01/71] cpu: convert queued work to a QSIMPLEQ | expand |
Emilio G. Cota <cota@braap.org> writes: > This lock will soon protect more fields of the struct. Give > it a more appropriate name. > > Reviewed-by: Richard Henderson <richard.henderson@linaro.org> > Signed-off-by: Emilio G. Cota <cota@braap.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> > --- > include/qom/cpu.h | 5 +++-- > cpus-common.c | 14 +++++++------- > cpus.c | 4 ++-- > qom/cpu.c | 2 +- > 4 files changed, 13 insertions(+), 12 deletions(-) > > diff --git a/include/qom/cpu.h b/include/qom/cpu.h > index 53488b202f..b813ca28fa 100644 > --- a/include/qom/cpu.h > +++ b/include/qom/cpu.h > @@ -315,7 +315,7 @@ struct qemu_work_item; > * @mem_io_pc: Host Program Counter at which the memory was accessed. > * @mem_io_vaddr: Target virtual address at which the memory was accessed. > * @kvm_fd: vCPU file descriptor for KVM. > - * @work_mutex: Lock to prevent multiple access to @work_list. > + * @lock: Lock to prevent multiple access to per-CPU fields. > * @work_list: List of pending asynchronous work. > * @trace_dstate_delayed: Delayed changes to trace_dstate (includes all changes > * to @trace_dstate). > @@ -356,7 +356,8 @@ struct CPUState { > int64_t icount_extra; > sigjmp_buf jmp_env; > > - QemuMutex work_mutex; > + QemuMutex lock; > + /* fields below protected by @lock */ > QSIMPLEQ_HEAD(, qemu_work_item) work_list; > > CPUAddressSpace *cpu_ases; > diff --git a/cpus-common.c b/cpus-common.c > index a2a6cd93a1..2913294cb7 100644 > --- a/cpus-common.c > +++ b/cpus-common.c > @@ -115,10 +115,10 @@ struct qemu_work_item { > > static void queue_work_on_cpu(CPUState *cpu, struct qemu_work_item *wi) > { > - qemu_mutex_lock(&cpu->work_mutex); > + qemu_mutex_lock(&cpu->lock); > QSIMPLEQ_INSERT_TAIL(&cpu->work_list, wi, node); > wi->done = false; > - qemu_mutex_unlock(&cpu->work_mutex); > + qemu_mutex_unlock(&cpu->lock); > > qemu_cpu_kick(cpu); > } > @@ -308,15 +308,15 @@ void process_queued_cpu_work(CPUState *cpu) > { > struct qemu_work_item *wi; > > - qemu_mutex_lock(&cpu->work_mutex); > + qemu_mutex_lock(&cpu->lock); > if (QSIMPLEQ_EMPTY(&cpu->work_list)) { > - qemu_mutex_unlock(&cpu->work_mutex); > + qemu_mutex_unlock(&cpu->lock); > return; > } > while (!QSIMPLEQ_EMPTY(&cpu->work_list)) { > wi = QSIMPLEQ_FIRST(&cpu->work_list); > QSIMPLEQ_REMOVE_HEAD(&cpu->work_list, node); > - qemu_mutex_unlock(&cpu->work_mutex); > + qemu_mutex_unlock(&cpu->lock); > if (wi->exclusive) { > /* Running work items outside the BQL avoids the following deadlock: > * 1) start_exclusive() is called with the BQL taken while another > @@ -332,13 +332,13 @@ void process_queued_cpu_work(CPUState *cpu) > } else { > wi->func(cpu, wi->data); > } > - qemu_mutex_lock(&cpu->work_mutex); > + qemu_mutex_lock(&cpu->lock); > if (wi->free) { > g_free(wi); > } else { > atomic_mb_set(&wi->done, true); > } > } > - qemu_mutex_unlock(&cpu->work_mutex); > + qemu_mutex_unlock(&cpu->lock); > qemu_cond_broadcast(&qemu_work_cond); > } > diff --git a/cpus.c b/cpus.c > index 6d86522031..b2a9698dc0 100644 > --- a/cpus.c > +++ b/cpus.c > @@ -92,9 +92,9 @@ static inline bool cpu_work_list_empty(CPUState *cpu) > { > bool ret; > > - qemu_mutex_lock(&cpu->work_mutex); > + qemu_mutex_lock(&cpu->lock); > ret = QSIMPLEQ_EMPTY(&cpu->work_list); > - qemu_mutex_unlock(&cpu->work_mutex); > + qemu_mutex_unlock(&cpu->lock); > return ret; > } > > diff --git a/qom/cpu.c b/qom/cpu.c > index c47169896e..d0758c907d 100644 > --- a/qom/cpu.c > +++ b/qom/cpu.c > @@ -372,7 +372,7 @@ static void cpu_common_initfn(Object *obj) > cpu->nr_cores = 1; > cpu->nr_threads = 1; > > - qemu_mutex_init(&cpu->work_mutex); > + qemu_mutex_init(&cpu->lock); > QSIMPLEQ_INIT(&cpu->work_list); > QTAILQ_INIT(&cpu->breakpoints); > QTAILQ_INIT(&cpu->watchpoints); -- Alex Bennée
diff --git a/include/qom/cpu.h b/include/qom/cpu.h index 53488b202f..b813ca28fa 100644 --- a/include/qom/cpu.h +++ b/include/qom/cpu.h @@ -315,7 +315,7 @@ struct qemu_work_item; * @mem_io_pc: Host Program Counter at which the memory was accessed. * @mem_io_vaddr: Target virtual address at which the memory was accessed. * @kvm_fd: vCPU file descriptor for KVM. - * @work_mutex: Lock to prevent multiple access to @work_list. + * @lock: Lock to prevent multiple access to per-CPU fields. * @work_list: List of pending asynchronous work. * @trace_dstate_delayed: Delayed changes to trace_dstate (includes all changes * to @trace_dstate). @@ -356,7 +356,8 @@ struct CPUState { int64_t icount_extra; sigjmp_buf jmp_env; - QemuMutex work_mutex; + QemuMutex lock; + /* fields below protected by @lock */ QSIMPLEQ_HEAD(, qemu_work_item) work_list; CPUAddressSpace *cpu_ases; diff --git a/cpus-common.c b/cpus-common.c index a2a6cd93a1..2913294cb7 100644 --- a/cpus-common.c +++ b/cpus-common.c @@ -115,10 +115,10 @@ struct qemu_work_item { static void queue_work_on_cpu(CPUState *cpu, struct qemu_work_item *wi) { - qemu_mutex_lock(&cpu->work_mutex); + qemu_mutex_lock(&cpu->lock); QSIMPLEQ_INSERT_TAIL(&cpu->work_list, wi, node); wi->done = false; - qemu_mutex_unlock(&cpu->work_mutex); + qemu_mutex_unlock(&cpu->lock); qemu_cpu_kick(cpu); } @@ -308,15 +308,15 @@ void process_queued_cpu_work(CPUState *cpu) { struct qemu_work_item *wi; - qemu_mutex_lock(&cpu->work_mutex); + qemu_mutex_lock(&cpu->lock); if (QSIMPLEQ_EMPTY(&cpu->work_list)) { - qemu_mutex_unlock(&cpu->work_mutex); + qemu_mutex_unlock(&cpu->lock); return; } while (!QSIMPLEQ_EMPTY(&cpu->work_list)) { wi = QSIMPLEQ_FIRST(&cpu->work_list); QSIMPLEQ_REMOVE_HEAD(&cpu->work_list, node); - qemu_mutex_unlock(&cpu->work_mutex); + qemu_mutex_unlock(&cpu->lock); if (wi->exclusive) { /* Running work items outside the BQL avoids the following deadlock: * 1) start_exclusive() is called with the BQL taken while another @@ -332,13 +332,13 @@ void process_queued_cpu_work(CPUState *cpu) } else { wi->func(cpu, wi->data); } - qemu_mutex_lock(&cpu->work_mutex); + qemu_mutex_lock(&cpu->lock); if (wi->free) { g_free(wi); } else { atomic_mb_set(&wi->done, true); } } - qemu_mutex_unlock(&cpu->work_mutex); + qemu_mutex_unlock(&cpu->lock); qemu_cond_broadcast(&qemu_work_cond); } diff --git a/cpus.c b/cpus.c index 6d86522031..b2a9698dc0 100644 --- a/cpus.c +++ b/cpus.c @@ -92,9 +92,9 @@ static inline bool cpu_work_list_empty(CPUState *cpu) { bool ret; - qemu_mutex_lock(&cpu->work_mutex); + qemu_mutex_lock(&cpu->lock); ret = QSIMPLEQ_EMPTY(&cpu->work_list); - qemu_mutex_unlock(&cpu->work_mutex); + qemu_mutex_unlock(&cpu->lock); return ret; } diff --git a/qom/cpu.c b/qom/cpu.c index c47169896e..d0758c907d 100644 --- a/qom/cpu.c +++ b/qom/cpu.c @@ -372,7 +372,7 @@ static void cpu_common_initfn(Object *obj) cpu->nr_cores = 1; cpu->nr_threads = 1; - qemu_mutex_init(&cpu->work_mutex); + qemu_mutex_init(&cpu->lock); QSIMPLEQ_INIT(&cpu->work_list); QTAILQ_INIT(&cpu->breakpoints); QTAILQ_INIT(&cpu->watchpoints);