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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
Download patch file Download diff file Expand all files Collapse all files

1
include/hw/acpi/cpu.h
View file

@ -49,6 +49,7 @@ void cpu_hotplug_hw_init(MemoryRegion *as, Object *owner,
typedef struct CPUHotplugFeatures {
bool apci_1_compatible;
bool has_legacy_cphp;
} CPUHotplugFeatures;
void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,

6
include/hw/acpi/cpu_hotplug.h
View file

@ -16,8 +16,10 @@
#include "hw/acpi/pc-hotplug.h"
#include "hw/acpi/aml-build.h"
#include "hw/hotplug.h"
#include "hw/acpi/cpu.h"
typedef struct AcpiCpuHotplug {
Object *device;
MemoryRegion io;
uint8_t sts[ACPI_GPE_PROC_LEN];
} AcpiCpuHotplug;
@ -28,6 +30,10 @@ void legacy_acpi_cpu_plug_cb(HotplugHandler *hotplug_dev,
void legacy_acpi_cpu_hotplug_init(MemoryRegion *parent, Object *owner,
AcpiCpuHotplug *gpe_cpu, uint16_t base);
void acpi_switch_to_modern_cphp(AcpiCpuHotplug *gpe_cpu,
CPUHotplugState *cpuhp_state,
uint16_t io_port);
void build_legacy_cpu_hotplug_aml(Aml *ctx, MachineState *machine,
uint16_t io_base);
#endif