[Qemu-devel] [PATCH 5/7] add qdev property type "cpu"

[Paolo Bonzini <pbonzini@redhat.com>]

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 cpus.c               |   16 ++++++++++++++++
 cpus.h               |    2 ++
 hw/qdev-properties.c |   44 ++++++++++++++++++++++++++++++++++++++++++++
 hw/qdev.h            |    5 +++++
 4 files changed, 67 insertions(+), 0 deletions(-)

diff --git a/cpus.c b/cpus.c
index fcd0f09..da6ec44 100644
--- a/cpus.c
+++ b/cpus.c
@@ -91,6 +91,22 @@ void cpu_synchronize_all_post_init(void)
     }
 }
 
+CPUState *cpu_get_by_id(int id)
+{
+    CPUState *cpu;
+
+    for (cpu = first_cpu; cpu; cpu = cpu->next_cpu)
+        if (cpu->cpu_index == id)
+            return cpu;
+
+    return NULL;
+}
+
+int cpu_get_id(CPUState *env)
+{
+    return env->cpu_index;
+}
+
 int cpu_is_stopped(CPUState *env)
 {
     return !vm_running || env->stopped;
diff --git a/cpus.h b/cpus.h
index 774150a..df3c193 100644
--- a/cpus.h
+++ b/cpus.h
@@ -6,6 +6,8 @@ int qemu_init_main_loop(void);
 void qemu_main_loop_start(void);
 void resume_all_vcpus(void);
 void pause_all_vcpus(void);
+CPUState *cpu_get_by_id(int id);
+int cpu_get_id(CPUState *env);
 
 /* vl.c */
 extern int smp_cores;
diff --git a/hw/qdev-properties.c b/hw/qdev-properties.c
index 5a8739d..2759c83 100644
--- a/hw/qdev-properties.c
+++ b/hw/qdev-properties.c
@@ -1,6 +1,7 @@
 #include "net.h"
 #include "qdev.h"
 #include "qerror.h"
+#include "cpus.h"
 
 void *qdev_get_prop_ptr(DeviceState *dev, Property *prop)
 {
@@ -281,6 +282,44 @@ PropertyInfo qdev_prop_string = {
     .free  = free_string,
 };
 
+/* --- cpu --- */
+
+static int parse_cpu(DeviceState *dev, Property *prop, const char *str)
+{
+    CPUState **ptr = qdev_get_prop_ptr(dev, prop);
+    char *end;
+    int id;
+
+    if (!*str)
+        return -ENOENT;
+
+    id = strtol (str, &end, 0);
+    if (*end)
+        return -ENOENT;
+
+    *ptr = cpu_get_by_id(id);
+    if (*ptr == NULL)
+        return -ENOENT;
+    return 0;
+}
+
+static int print_cpu(DeviceState *dev, Property *prop, char *dest, size_t len)
+{
+    CPUState **ptr = qdev_get_prop_ptr(dev, prop);
+    if (*ptr)
+        return snprintf(dest, len, "CPU #%d", cpu_get_id(*ptr));
+    else
+	return snprintf(dest, len, "CPU #<null>");
+}
+
+PropertyInfo qdev_prop_cpu = {
+    .name  = "cpu",
+    .type  = PROP_TYPE_CPU,
+    .size  = sizeof(DriveInfo*),
+    .parse = parse_cpu,
+    .print = print_cpu,
+};
+
 /* --- drive --- */
 
 static int parse_drive(DeviceState *dev, Property *prop, const char *str)
@@ -657,6 +696,11 @@ void qdev_prop_set_ptr(DeviceState *dev, const char *name, void *value)
     qdev_prop_set(dev, name, &value, PROP_TYPE_PTR);
 }
 
+void qdev_prop_set_cpu(DeviceState *dev, const char *name, CPUState *value)
+{
+    qdev_prop_set(dev, name, &value, PROP_TYPE_CPU);
+}
+
 void qdev_prop_set_defaults(DeviceState *dev, Property *props)
 {
     if (!props)
diff --git a/hw/qdev.h b/hw/qdev.h
index be5ad67..eec2f52 100644
--- a/hw/qdev.h
+++ b/hw/qdev.h
@@ -90,6 +90,7 @@ enum PropertyType {
     PROP_TYPE_VLAN,
     PROP_TYPE_PTR,
     PROP_TYPE_BIT,
+    PROP_TYPE_CPU,
 };
 
 struct PropertyInfo {
@@ -203,6 +204,7 @@ extern PropertyInfo qdev_prop_drive;
 extern PropertyInfo qdev_prop_netdev;
 extern PropertyInfo qdev_prop_vlan;
 extern PropertyInfo qdev_prop_pci_devfn;
+extern PropertyInfo qdev_prop_cpu;
 
 #define DEFINE_PROP(_name, _state, _field, _prop, _type) { \
         .name      = (_name),                                    \
@@ -257,6 +259,8 @@ extern PropertyInfo qdev_prop_pci_devfn;
     DEFINE_PROP(_n, _s, _f, qdev_prop_drive, DriveInfo*)
 #define DEFINE_PROP_MACADDR(_n, _s, _f)         \
     DEFINE_PROP(_n, _s, _f, qdev_prop_macaddr, MACAddr)
+#define DEFINE_PROP_CPU(_n, _s, _f)             \
+    DEFINE_PROP(_n, _s, _f, qdev_prop_cpu, CPUState*)
 
 #define DEFINE_PROP_END_OF_LIST()               \
     {}
@@ -276,6 +280,7 @@ void qdev_prop_set_chr(DeviceState *dev, const char *name, CharDriverState *valu
 void qdev_prop_set_netdev(DeviceState *dev, const char *name, VLANClientState *value);
 void qdev_prop_set_vlan(DeviceState *dev, const char *name, VLANState *value);
 void qdev_prop_set_drive(DeviceState *dev, const char *name, DriveInfo *value);
+void qdev_prop_set_cpu(DeviceState *dev, const char *name, CPUState *value);
 void qdev_prop_set_macaddr(DeviceState *dev, const char *name, uint8_t *value);
 /* FIXME: Remove opaque pointer properties.  */
 void qdev_prop_set_ptr(DeviceState *dev, const char *name, void *value);
-- 
1.7.0.1