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[Qemu-devel] [PATCH 2/7] store thread-specific env information
From: |
Glauber Costa |
Subject: |
[Qemu-devel] [PATCH 2/7] store thread-specific env information |
Date: |
Thu, 26 Nov 2009 15:24:55 -0200 |
Since we'll have multiple cpu threads, at least for kvm, we need a way to store
and retrieve the CPUState associated with the current execution thread.
For the I/O thread, this will be NULL.
I am using pthread functions for that, for portability, but we could as well
use __thread keyword.
Signed-off-by: Glauber Costa <address@hidden>
---
vl.c | 21 +++++++++++++++++++++
1 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/vl.c b/vl.c
index ee43808..9afe4b6 100644
--- a/vl.c
+++ b/vl.c
@@ -3436,6 +3436,24 @@ static void block_io_signals(void);
static void unblock_io_signals(void);
static int tcg_has_work(void);
+static pthread_key_t current_env;
+
+CPUState *qemu_get_current_env(void);
+CPUState *qemu_get_current_env(void)
+{
+ return pthread_getspecific(current_env);
+}
+
+static void qemu_set_current_env(CPUState *env)
+{
+ pthread_setspecific(current_env, env);
+}
+
+static void qemu_init_current_env(void)
+{
+ pthread_key_create(¤t_env, NULL);
+}
+
static int qemu_init_main_loop(void)
{
int ret;
@@ -3448,6 +3466,7 @@ static int qemu_init_main_loop(void)
qemu_mutex_init(&qemu_fair_mutex);
qemu_mutex_init(&qemu_global_mutex);
qemu_mutex_lock(&qemu_global_mutex);
+ qemu_init_current_env();
unblock_io_signals();
qemu_thread_self(&io_thread);
@@ -3486,6 +3505,8 @@ static void *kvm_cpu_thread_fn(void *arg)
block_io_signals();
qemu_thread_self(env->thread);
+ qemu_set_current_env(env);
+
if (kvm_enabled())
kvm_init_vcpu(env);
--
1.6.5.2
- [Qemu-devel] [PATCH 0/7] KVM SMP support, early version, Glauber Costa, 2009/11/26
- [Qemu-devel] [PATCH 1/7] Don't mess with halted state., Glauber Costa, 2009/11/26
- [Qemu-devel] [PATCH 2/7] store thread-specific env information,
Glauber Costa <=
- [Qemu-devel] [PATCH 3/7] update halted state on mp_state sync, Glauber Costa, 2009/11/26
- [Qemu-devel] [PATCH 4/7] qemu_flush_work for remote vcpu execution, Glauber Costa, 2009/11/26
- [Qemu-devel] [PATCH 5/7] tell kernel about all registers instead of just mp_state, Glauber Costa, 2009/11/26
- [Qemu-devel] [PATCH 6/7] Don't call kvm cpu reset on initialization, Glauber Costa, 2009/11/26
- [Qemu-devel] [PATCH 7/7] remove smp restriction from kvm, Glauber Costa, 2009/11/26
- Re: [Qemu-devel] [PATCH 5/7] tell kernel about all registers instead of just mp_state, Avi Kivity, 2009/11/29
- Re: [Qemu-devel] [PATCH 5/7] tell kernel about all registers instead of just mp_state, Glauber Costa, 2009/11/30
- Re: [Qemu-devel] [PATCH 5/7] tell kernel about all registers instead of just mp_state, Gleb Natapov, 2009/11/30
- Re: [Qemu-devel] [PATCH 5/7] tell kernel about all registers instead of just mp_state, Avi Kivity, 2009/11/30
- Re: [Qemu-devel] [PATCH 5/7] tell kernel about all registers instead of just mp_state, Glauber Costa, 2009/11/30