[Qemu-devel] [PATCH 18/21] get_env accel wrapper

[Glauber Costa <glommer@redhat.com>]

From: Glauber Costa <gcosta@redhat.com>

Allow the current accelerator to provide it's own, customized
address of the CPUState structure used for the env variable.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
---
 accel.c              |    6 ++++++
 accel.h              |    7 +++++++
 kqemu.c              |    1 +
 target-i386/helper.c |    2 +-
 4 files changed, 15 insertions(+), 1 deletions(-)

diff --git a/accel.c b/accel.c
index 6517af2..08329a4 100644
--- a/accel.c
+++ b/accel.c
@@ -14,6 +14,11 @@ int noaccel_info(CPUState *env, char *buf)
     return sprintf(buf, "no accelerator present.\n");
 }
 
+CPUState *noaccel_get_env(void)
+{
+    return qemu_mallocz(sizeof(CPUState));
+}
+
 #define accel_nop ((void *)_accel_nop)
 
 /* Accelerator wrapper for the no-accel (raw qemu) case */
@@ -21,6 +26,7 @@ QEMUAccel noaccel = {
     .name = "none",
     .cpu_interrupt = accel_nop,
     .init_env = accel_nop,
+    .get_env = noaccel_get_env,
     .start = accel_nop,
     .flush_cache = accel_nop,
     .flush_page = accel_nop,
diff --git a/accel.h b/accel.h
index 5f04163..1d5986a 100644
--- a/accel.h
+++ b/accel.h
@@ -4,6 +4,7 @@
 typedef struct QEMUAccel {
     char *name;
     void (*cpu_interrupt)(CPUState *env);
+    CPUState *(*get_env)(void);
     void (*init_env)(CPUState *env);
     int (*start)(void);
     void (*flush_cache)(CPUState *env, int global);
@@ -35,6 +36,7 @@ extern QEMUAccel kqemu_accel;
 
 extern QEMUCont *head;
 void *qemu_mallocz(size_t size);
+extern CPUState *noaccel_get_env(void);
 
 static inline int register_qemu_accel(QEMUAccel *accel)
 {
@@ -91,6 +93,11 @@ static inline int accel_start(void)
     return status;
 }
 
+static inline CPUState *accel_get_env(void)
+{
+    return current_accel->get_env();
+}
+
 static inline void accel_init_env(CPUState *env)
 {
     current_accel->init_env(env);
diff --git a/kqemu.c b/kqemu.c
index 58e9e3f..d543e29 100644
--- a/kqemu.c
+++ b/kqemu.c
@@ -453,6 +453,7 @@ QEMUAccel kqemu_accel = {
     .name = "KQEMU",
     .cpu_interrupt = kqemu_cpu_interrupt,
     .init_env = kqemu_init_env,
+    .get_env = noaccel_get_env,
     .start = kqemu_start,
     .flush_cache = kqemu_flush,
     .flush_page = kqemu_flush_page,
diff --git a/target-i386/helper.c b/target-i386/helper.c
index d15e3f9..8fc33c6 100644
--- a/target-i386/helper.c
+++ b/target-i386/helper.c
@@ -98,7 +98,7 @@ CPUX86State *cpu_x86_init(const char *cpu_model)
     CPUX86State *env;
     static int inited;
 
-    env = qemu_mallocz(sizeof(CPUX86State));
+    env = accel_get_env();
     if (!env)
         return NULL;
     cpu_exec_init(env);
-- 
1.5.5.1