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authorIgor Mammedov <imammedo@redhat.com>2013-04-25 16:05:24 +0200
committerAndreas Färber <afaerber@suse.de>2013-05-01 13:04:18 +0200
commit69e5ff067ae724155fd7465119ee6db5721288b6 (patch)
tree61f6bad7b182abc129904155a7d27f47d118a8d3
parenta37677c32bb313f5ba48aaf89f81cdc10c23ce56 (diff)
cpu: Add helper cpu_exists(), to check if CPU with specified id exists
Signed-off-by: Igor Mammedov <imammedo@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
-rw-r--r--include/qom/cpu.h10
-rw-r--r--qom/cpu.c26
2 files changed, 36 insertions, 0 deletions
diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index a28e5ffee2..e54579bd4f 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -234,6 +234,16 @@ void qemu_for_each_cpu(void (*func)(CPUState *cpu, void *data), void *data);
*/
CPUState *qemu_get_cpu(int index);
+/**
+ * cpu_exists:
+ * @id: Guest-exposed CPU ID to lookup.
+ *
+ * Search for CPU with specified ID.
+ *
+ * Returns: %true - CPU is found, %false - CPU isn't found.
+ */
+bool cpu_exists(int64_t id);
+
#ifndef CONFIG_USER_ONLY
typedef void (*CPUInterruptHandler)(CPUState *, int);
diff --git a/qom/cpu.c b/qom/cpu.c
index 9a4457ba1b..3dc8208a73 100644
--- a/qom/cpu.c
+++ b/qom/cpu.c
@@ -24,6 +24,32 @@
#include "qemu/notify.h"
#include "sysemu/sysemu.h"
+typedef struct CPUExistsArgs {
+ int64_t id;
+ bool found;
+} CPUExistsArgs;
+
+static void cpu_exist_cb(CPUState *cpu, void *data)
+{
+ CPUClass *klass = CPU_GET_CLASS(cpu);
+ CPUExistsArgs *arg = data;
+
+ if (klass->get_arch_id(cpu) == arg->id) {
+ arg->found = true;
+ }
+}
+
+bool cpu_exists(int64_t id)
+{
+ CPUExistsArgs data = {
+ .id = id,
+ .found = false,
+ };
+
+ qemu_for_each_cpu(cpu_exist_cb, &data);
+ return data.found;
+}
+
/* CPU hot-plug notifiers */
static NotifierList cpu_added_notifiers =
NOTIFIER_LIST_INITIALIZER(cpu_add_notifiers);