diff mbox series

[RFC,v4,58/71] cpu: call .cpu_has_work with the CPU lock held

Message ID 20181025144644.15464-58-cota@braap.org (mailing list archive)
State New, archived
Headers show
Series [RFC,v4,01/71] cpu: convert queued work to a QSIMPLEQ | expand

Commit Message

Emilio Cota Oct. 25, 2018, 2:46 p.m. UTC 
Signed-off-by: Emilio G. Cota <cota@braap.org>
---
 include/qom/cpu.h | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

Comments

Richard Henderson Oct. 26, 2018, 3:48 p.m. UTC | #1 
On 10/25/18 3:46 PM, Emilio G. Cota wrote:
> Signed-off-by: Emilio G. Cota <cota@braap.org>
> ---
>  include/qom/cpu.h | 12 ++++++++++--
>  1 file changed, 10 insertions(+), 2 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~
diff mbox series

Patch

diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index a86690c7a5..9826cdfa4c 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -84,7 +84,8 @@  struct TranslationBlock;
  * @parse_features: Callback to parse command line arguments.
  * @reset: Callback to reset the #CPUState to its initial state.
  * @reset_dump_flags: #CPUDumpFlags to use for reset logging.
- * @has_work: Callback for checking if there is work to do.
+ * @has_work: Callback for checking if there is work to do. Called with the
+ * CPU lock held.
  * @do_interrupt: Callback for interrupt handling.
  * @do_unassigned_access: Callback for unassigned access handling.
  * (this is deprecated: new targets should use do_transaction_failed instead)
@@ -793,9 +794,16 @@  const char *parse_cpu_model(const char *cpu_model);
 static inline bool cpu_has_work(CPUState *cpu)
 {
     CPUClass *cc = CPU_GET_CLASS(cpu);
+    bool ret;
 
     g_assert(cc->has_work);
-    return cc->has_work(cpu);
+    if (cpu_mutex_locked(cpu)) {
+        return cc->has_work(cpu);
+    }
+    cpu_mutex_lock(cpu);
+    ret = cc->has_work(cpu);
+    cpu_mutex_unlock(cpu);
+    return ret;
 }
 
 /**