motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-07 09:43:56 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

pc: Parse CPU features only once

Browse source 
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>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Igor Mammedov 2016-06-09 19:11:03 +02:00 • committed by Eduardo Habkost
parent 09f71b054a
commit 6aff24c6a6
4 changed files with 28 additions and 55 deletions
Download patch file Download diff file Expand all files Collapse all files

37
hw/i386/pc.c
View file

@ -1039,21 +1039,17 @@ void pc_acpi_smi_interrupt(void *opaque, int irq, int level)
}
}
static X86CPU *pc_new_cpu(const char *cpu_model, int64_t apic_id,
static X86CPU *pc_new_cpu(const char *typename, int64_t apic_id,
Error **errp)
{
X86CPU *cpu = NULL;
Error *local_err = NULL;
cpu = cpu_x86_create(cpu_model, &local_err);
if (local_err != NULL) {
goto out;
}
cpu = X86_CPU(object_new(typename));
object_property_set_int(OBJECT(cpu), apic_id, "apic-id", &local_err);
object_property_set_bool(OBJECT(cpu), true, "realized", &local_err);
out:
if (local_err) {
error_propagate(errp, local_err);
object_unref(OBJECT(cpu));
@ -1065,7 +1061,8 @@ out:
void pc_hot_add_cpu(const int64_t id, Error **errp)
{
X86CPU *cpu;
MachineState *machine = MACHINE(qdev_get_machine());
ObjectClass *oc;
PCMachineState *pcms = PC_MACHINE(qdev_get_machine());
int64_t apic_id = x86_cpu_apic_id_from_index(id);
Error *local_err = NULL;
@ -1093,7 +1090,9 @@ void pc_hot_add_cpu(const int64_t id, Error **errp)
return;
}
cpu = pc_new_cpu(machine->cpu_model, apic_id, &local_err);
assert(pcms->possible_cpus->cpus[0].cpu); /* BSP is always present */
oc = OBJECT_CLASS(CPU_GET_CLASS(pcms->possible_cpus->cpus[0].cpu));
cpu = pc_new_cpu(object_class_get_name(oc), apic_id, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
@ -1104,6 +1103,10 @@ void pc_hot_add_cpu(const int64_t id, Error **errp)
void pc_cpus_init(PCMachineState *pcms)
{
int i;
CPUClass *cc;
ObjectClass *oc;
const char *typename;
gchar **model_pieces;
X86CPU *cpu = NULL;
MachineState *machine = MACHINE(pcms);
@ -1116,6 +1119,22 @@ void pc_cpus_init(PCMachineState *pcms)
#endif
}
model_pieces = g_strsplit(machine->cpu_model, ",", 2);
if (!model_pieces[0]) {
error_report("Invalid/empty CPU model name");
exit(1);
}
oc = cpu_class_by_name(TYPE_X86_CPU, model_pieces[0]);
if (oc == NULL) {
error_report("Unable to find CPU definition: %s", model_pieces[0]);
exit(1);
}
typename = object_class_get_name(oc);
cc = CPU_CLASS(oc);
cc->parse_features(typename, model_pieces[1], &error_fatal);
g_strfreev(model_pieces);
/* Calculates the limit to CPU APIC ID values
*
* Limit for the APIC ID value, so that all
@ -1136,7 +1155,7 @@ void pc_cpus_init(PCMachineState *pcms)
pcms->possible_cpus->cpus[i].arch_id = x86_cpu_apic_id_from_index(i);
pcms->possible_cpus->len++;
if (i < smp_cpus) {
cpu = pc_new_cpu(machine->cpu_model, x86_cpu_apic_id_from_index(i),
cpu = pc_new_cpu(typename, x86_cpu_apic_id_from_index(i),
&error_fatal);
pcms->possible_cpus->cpus[i].cpu = CPU(cpu);
object_unref(OBJECT(cpu));