Re: [Qemu-devel] [patch v5 7/8] memory: introduce tls context to record nested dma

[Paolo Bonzini <pbonzini@redhat.com>]

Il 29/10/2012 00:48, Liu Ping Fan ha scritto:
> Signed-off-by: Liu Ping Fan <pingfank@linux.vnet.ibm.com>
> ---
>  cpus.c        |    3 ++
>  exec.c        |   58 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  qemu-thread.h |    8 +++++++
>  vl.c          |    1 +
>  4 files changed, 70 insertions(+), 0 deletions(-)
> 
> diff --git a/cpus.c b/cpus.c
> index 191cbf5..e67d80f 100644
> --- a/cpus.c
> +++ b/cpus.c
> @@ -733,6 +733,7 @@ static void *qemu_kvm_cpu_thread_fn(void *arg)
>  
>      qemu_mutex_lock(&qemu_global_mutex);
>      qemu_thread_get_self(cpu->thread);
> +    qemu_thread_init_context();
>      env->thread_id = qemu_get_thread_id();
>      cpu_single_env = env;
>  
> @@ -774,6 +775,7 @@ static void *qemu_dummy_cpu_thread_fn(void *arg)
>  
>      qemu_mutex_lock_iothread();
>      qemu_thread_get_self(cpu->thread);
> +    qemu_thread_init_context();
>      env->thread_id = qemu_get_thread_id();
>  
>      sigemptyset(&waitset);
> @@ -813,6 +815,7 @@ static void *qemu_tcg_cpu_thread_fn(void *arg)
>  
>      qemu_tcg_init_cpu_signals();
>      qemu_thread_get_self(cpu->thread);
> +    qemu_thread_init_context();
>  
>      /* signal CPU creation */
>      qemu_mutex_lock(&qemu_global_mutex);
> diff --git a/exec.c b/exec.c
> index 46da08c..ea672c6 100644
> --- a/exec.c
> +++ b/exec.c
> @@ -3449,6 +3449,49 @@ static bool address_space_section_lookup_ref(AddressSpace *as,
>      return safe_ref;
>  }
>  
> +typedef struct ThreadContext {
> +  DispatchType dispatch_type;
> +  unsigned int mmio_req_pending;
> +} ThreadContext;
> +
> +static __thread ThreadContext *thread_context;
> +
> +void qemu_thread_init_context(void)
> +{
> +    thread_context = g_new(ThreadContext, 1);
> +    thread_context->dispatch_type = DISPATCH_INIT;
> +    thread_context->mmio_req_pending = 0;
> +}

No need for this:

static __thread ThreadContext thread_context = {
    .dispatch_type = DISPATCH_INIT,
    .mmio_req_pending = 0
};

Paolo