Re: [Qemu-devel] [RFC v2 04/11] cpus: Wrap mutex used to protect CPU work

["Alex Bennée" <alex.bennee@linaro.org>]

Sergey Fedorov <sergey.fedorov@linaro.org> writes:

> From: Sergey Fedorov <serge.fdrv@gmail.com>
>
> This will be useful to enable CPU work on user mode emulation.
>
> Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com>
> Signed-off-by: Sergey Fedorov <sergey.fedorov@linaro.org>

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

> ---
>  cpus.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/cpus.c b/cpus.c
> index 04687c85bcd4..f80ed2aeefdd 100644
> --- a/cpus.c
> +++ b/cpus.c
> @@ -910,6 +910,11 @@ void qemu_init_cpu_loop(void)
>      qemu_thread_get_self(&io_thread);
>  }
>
> +static QemuMutex *qemu_get_cpu_work_mutex(void)
> +{
> +    return &qemu_global_mutex;
> +}
> +
>  static void queue_work_on_cpu(CPUState *cpu, struct qemu_work_item *wi)
>  {
>      qemu_mutex_lock(&cpu->work_mutex);
> @@ -943,7 +948,7 @@ void run_on_cpu(CPUState *cpu, run_on_cpu_func func, void *data)
>      while (!atomic_mb_read(&wi.done)) {
>          CPUState *self_cpu = current_cpu;
>
> -        qemu_cond_wait(&qemu_work_cond, &qemu_global_mutex);
> +        qemu_cond_wait(&qemu_work_cond, qemu_get_cpu_work_mutex());
>          current_cpu = self_cpu;
>      }
>  }


--
Alex Bennée