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ACPI: Add Virtual Machine Generation ID support

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This implements the VM Generation ID feature by passing a 128-bit
GUID to the guest via a fw_cfg blob.
Any time the GUID changes, an ACPI notify event is sent to the guest

The user interface is a simple device with one parameter:
 - guid (string, must be "auto" or in UUID format
   xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx)

Signed-off-by: Ben Warren <ben@skyportsystems.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Ben Warren 2017-02-16 15:15:36 -08:00 • committed by Michael S. Tsirkin
parent c7809e6cd7
commit d03637bcfb
7 changed files with 297 additions and 0 deletions
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1
include/hw/acpi/acpi_dev_interface.h
View file

@ -11,6 +11,7 @@ typedef enum {
ACPI_CPU_HOTPLUG_STATUS = 4,
ACPI_MEMORY_HOTPLUG_STATUS = 8,
ACPI_NVDIMM_HOTPLUG_STATUS = 16,
ACPI_VMGENID_CHANGE_STATUS = 32,
} AcpiEventStatusBits;
#define TYPE_ACPI_DEVICE_IF "acpi-device-interface"

35
include/hw/acpi/vmgenid.h Normal file
View file

@ -0,0 +1,35 @@
#ifndef ACPI_VMGENID_H
#define ACPI_VMGENID_H
#include "hw/acpi/bios-linker-loader.h"
#include "hw/qdev.h"
#include "qemu/uuid.h"
#define VMGENID_DEVICE "vmgenid"
#define VMGENID_GUID "guid"
#define VMGENID_GUID_FW_CFG_FILE "etc/vmgenid_guid"
#define VMGENID_ADDR_FW_CFG_FILE "etc/vmgenid_addr"
#define VMGENID_FW_CFG_SIZE 4096 /* Occupy a page of memory */
#define VMGENID_GUID_OFFSET 40 /* allow space for
* OVMF SDT Header Probe Supressor
*/
#define VMGENID(obj) OBJECT_CHECK(VmGenIdState, (obj), VMGENID_DEVICE)
typedef struct VmGenIdState {
DeviceClass parent_obj;
QemuUUID guid; /* The 128-bit GUID seen by the guest */
uint8_t vmgenid_addr_le[8]; /* Address of the GUID (little-endian) */
} VmGenIdState;
static inline Object *find_vmgenid_dev(void)
{
return object_resolve_path_type("", VMGENID_DEVICE, NULL);
}
void vmgenid_build_acpi(VmGenIdState *vms, GArray *table_data, GArray *guid,
BIOSLinker *linker);
void vmgenid_add_fw_cfg(VmGenIdState *vms, FWCfgState *s, GArray *guid);
#endif