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pc: use new CPU hotplug interface since 2.7 machine type

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For compatibility reasons PC/Q35 will start with legacy
CPU hotplug interface by default but with new CPU hotplug
AML code since 2.7 machine type. That way legacy firmware
that doesn't use QEMU generated ACPI tables will be
able to continue using legacy CPU hotplug interface.

While new machine type, with firmware supporting QEMU
provided ACPI tables, will generate new CPU hotplug AML,
which will switch to new CPU hotplug interface when
guest OS executes its _INI method on ACPI tables
loading.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2016-06-15 11:25:23 +02:00 • committed by Michael S. Tsirkin
parent 76623d00ae
commit 679dd1a957
10 changed files with 118 additions and 2 deletions
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2
hw/i386/pc_piix.c
View file

@ -445,9 +445,11 @@ DEFINE_I440FX_MACHINE(v2_7, "pc-i440fx-2.7", NULL,
static void pc_i440fx_2_6_machine_options(MachineClass *m)
{
PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
pc_i440fx_2_7_machine_options(m);
m->is_default = 0;
m->alias = NULL;
pcmc->legacy_cpu_hotplug = true;
SET_MACHINE_COMPAT(m, PC_COMPAT_2_6);
}