[Qemu-devel] [RFC PATCH v6 03/32] icount: set can_do_io outside TB execution

[Pavel Dovgalyuk]

This patch sets can_do_io function to allow reading icount
within cpu-exec, but outside TB execution.

Signed-off-by: Pavel Dovgalyuk <address@hidden>
---
 cpu-exec.c |    3 +++
 cpus.c     |    3 +++
 2 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/cpu-exec.c b/cpu-exec.c
index f52f292..88675ca 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -168,7 +168,9 @@ static inline tcg_target_ulong cpu_tb_exec(CPUState *cpu, 
uint8_t *tb_ptr)
     }
 #endif /* DEBUG_DISAS */
 
+    cpu->can_do_io = 0;
     next_tb = tcg_qemu_tb_exec(env, tb_ptr);
+    cpu->can_do_io = 1;
     trace_exec_tb_exit((void *) (next_tb & ~TB_EXIT_MASK),
                        next_tb & TB_EXIT_MASK);
 
@@ -548,6 +550,7 @@ int cpu_exec(CPUArchState *env)
             cpu = current_cpu;
             env = cpu->env_ptr;
             cc = CPU_GET_CLASS(cpu);
+            cpu->can_do_io = 1;
 #ifdef TARGET_I386
             x86_cpu = X86_CPU(cpu);
 #endif
diff --git a/cpus.c b/cpus.c
index 0c33458..7a45a51 100644
--- a/cpus.c
+++ b/cpus.c
@@ -934,6 +934,7 @@ static void *qemu_kvm_cpu_thread_fn(void *arg)
     qemu_mutex_lock(&qemu_global_mutex);
     qemu_thread_get_self(cpu->thread);
     cpu->thread_id = qemu_get_thread_id();
+    cpu->can_do_io = 1;
     current_cpu = cpu;
 
     r = kvm_init_vcpu(cpu);
@@ -974,6 +975,7 @@ static void *qemu_dummy_cpu_thread_fn(void *arg)
     qemu_mutex_lock_iothread();
     qemu_thread_get_self(cpu->thread);
     cpu->thread_id = qemu_get_thread_id();
+    cpu->can_do_io = 1;
 
     sigemptyset(&waitset);
     sigaddset(&waitset, SIG_IPI);
@@ -1016,6 +1018,7 @@ static void *qemu_tcg_cpu_thread_fn(void *arg)
     CPU_FOREACH(cpu) {
         cpu->thread_id = qemu_get_thread_id();
         cpu->created = true;
+        cpu->can_do_io = 1;
     }
     qemu_cond_signal(&qemu_cpu_cond);