[Qemu-devel] [PATCH v2 5/6] arm: virt: parse cpu_model only once

[Igor Mammedov <imammedo@redhat.com>]

considering that features are converted to
global properties and global properties are
automatically applied to every new instance
of created CPU (at object_new() time), there
is no point in parsing cpu_model string every
time a CPU created.
So move parsing outside CPU creation loop and
do it only once.
Parsing also should be done before any CPU is
created so that features would affect the first
CPU a well.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/arm/virt.c | 42 +++++++++++++++++++++---------------------
 qom/cpu.c     |  1 -
 2 files changed, 21 insertions(+), 22 deletions(-)

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 3519c9f..790680f 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1113,6 +1113,10 @@ static void machvirt_init(MachineState *machine)
     VirtGuestInfoState *guest_info_state = g_malloc0(sizeof *guest_info_state);
     VirtGuestInfo *guest_info = &guest_info_state->info;
     char **cpustr;
+    ObjectClass *oc;
+    const char *typename;
+    CPUClass *cc;
+    Error *err = NULL;
     bool firmware_loaded = bios_name || drive_get(IF_PFLASH, 0, 0);
 
     if (!cpu_model) {
@@ -1196,27 +1200,24 @@ static void machvirt_init(MachineState *machine)
 
     create_fdt(vbi);
 
-    for (n = 0; n < smp_cpus; n++) {
-        ObjectClass *oc = cpu_class_by_name(TYPE_ARM_CPU, cpustr[0]);
-        const char *typename = object_class_get_name(oc);
-        CPUClass *cc = CPU_CLASS(oc);
-        Object *cpuobj;
-        Error *err = NULL;
-        char *cpuopts = g_strdup(cpustr[1]);
-
-        if (!oc) {
-            error_report("Unable to find CPU definition");
-            exit(1);
-        }
-        /* convert -smp CPU options specified by the user into global props */
-        cc->parse_features(typename, cpuopts, &err);
-        cpuobj = object_new(typename);
+    oc = cpu_class_by_name(TYPE_ARM_CPU, cpustr[0]);
+    if (!oc) {
+        error_report("Unable to find CPU definition");
+        exit(1);
+    }
+    typename = object_class_get_name(oc);
 
-        g_free(cpuopts);
-        if (err) {
-            error_report_err(err);
-            exit(1);
-        }
+    /* convert -smp CPU options specified by the user into global props */
+    cc = CPU_CLASS(oc);
+    cc->parse_features(typename, cpustr[1], &err);
+    g_strfreev(cpustr);
+    if (err) {
+        error_report_err(err);
+        exit(1);
+    }
+
+    for (n = 0; n < smp_cpus; n++) {
+        Object *cpuobj = object_new(typename);
 
         if (!vms->secure) {
             object_property_set_bool(cpuobj, false, "has_el3", NULL);
@@ -1247,7 +1248,6 @@ static void machvirt_init(MachineState *machine)
 
         object_property_set_bool(cpuobj, true, "realized", NULL);
     }
-    g_strfreev(cpustr);
     fdt_add_timer_nodes(vbi, gic_version);
     fdt_add_cpu_nodes(vbi);
     fdt_add_psci_node(vbi);
diff --git a/qom/cpu.c b/qom/cpu.c
index eee23db..1295f5b 100644
--- a/qom/cpu.c
+++ b/qom/cpu.c
@@ -296,7 +296,6 @@ static void cpu_common_parse_features(const char *typename, char *features,
      * call it only once, so we can remove this check (or change it
      * to assert(!cpu_globals_initialized).
      * Current callers of ->parse_features() are:
-     * - machvirt_init()
      * - cpu_generic_init()
      * - cpu_x86_create()
      */
-- 
2.7.0