From: KONRAD Frederic <fred.kon...@greensocs.com>
This flag indicates if the VCPU is currently executing TCG code.
Signed-off-by: KONRAD Frederic <fred.kon...@greensocs.com>
Changes V1 -> V2:
* do both tcg_executing = 0 or 1 in cpu_exec().
---
cpu-exec.c | 2 ++
include/qom/cpu.h | 3 +++
qom/cpu.c | 1 +
3 files changed, 6 insertions(+)
diff --git a/cpu-exec.c b/cpu-exec.c
index 75694f3..2fdf89d 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -371,6 +371,7 @@ int cpu_exec(CPUState *cpu)
cpu->halted = 0;
}
+ cpu->tcg_executing = 1;
current_cpu = cpu;
/* As long as current_cpu is null, up to the assignment just above,
@@ -583,5 +584,6 @@ int cpu_exec(CPUState *cpu)
/* fail safe : never use current_cpu outside cpu_exec() */
current_cpu = NULL;
+ cpu->tcg_executing = 0;
return ret;
}
diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index efa9624..a2de536 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -226,6 +226,7 @@ struct kvm_run;
* @stopped: Indicates the CPU has been artificially stopped.
* @tcg_exit_req: Set to force TCG to stop executing linked TBs for this
* CPU and return to its top level loop.
+ * @tcg_executing: This TCG thread is in cpu_exec().
* @singlestep_enabled: Flags for single-stepping.
* @icount_extra: Instructions until next timer event.
* @icount_decr: Number of cycles left, with interrupt flag in high bit.
@@ -322,6 +323,8 @@ struct CPUState {
(absolute value) offset as small as possible. This reduces code
size, especially for hosts without large memory offsets. */
volatile sig_atomic_t tcg_exit_req;
+
+ volatile int tcg_executing;
};
QTAILQ_HEAD(CPUTailQ, CPUState);
diff --git a/qom/cpu.c b/qom/cpu.c
index 4e12598..62663e5 100644
--- a/qom/cpu.c
+++ b/qom/cpu.c
@@ -249,6 +249,7 @@ static void cpu_common_reset(CPUState *cpu)
cpu->icount_decr.u32 = 0;
cpu->can_do_io = 0;
cpu->exception_index = -1;
+ cpu->tcg_executing = 0;
memset(cpu->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof(void *));
}
--
1.9.0
