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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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16
hw/i386/acpi-build.c
View file

@ -42,6 +42,7 @@
#include "hw/acpi/memory_hotplug.h"
#include "sysemu/tpm.h"
#include "hw/acpi/tpm.h"
#include "hw/acpi/vmgenid.h"
#include "sysemu/tpm_backend.h"
#include "hw/timer/mc146818rtc_regs.h"
#include "sysemu/numa.h"
@ -2610,6 +2611,7 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine)
size_t aml_len = 0;
GArray *tables_blob = tables->table_data;
AcpiSlicOem slic_oem = { .id = NULL, .table_id = NULL };
Object *vmgenid_dev;
acpi_get_pm_info(&pm);
acpi_get_misc_info(&misc);
@ -2653,6 +2655,13 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine)
acpi_add_table(table_offsets, tables_blob);
build_madt(tables_blob, tables->linker, pcms);
vmgenid_dev = find_vmgenid_dev();
if (vmgenid_dev) {
acpi_add_table(table_offsets, tables_blob);
vmgenid_build_acpi(VMGENID(vmgenid_dev), tables_blob,
tables->vmgenid, tables->linker);
}
if (misc.has_hpet) {
acpi_add_table(table_offsets, tables_blob);
build_hpet(tables_blob, tables->linker);
@ -2823,6 +2832,7 @@ void acpi_setup(void)
PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
AcpiBuildTables tables;
AcpiBuildState *build_state;
Object *vmgenid_dev;
if (!pcms->fw_cfg) {
ACPI_BUILD_DPRINTF("No fw cfg. Bailing out.\n");
@ -2859,6 +2869,12 @@ void acpi_setup(void)
fw_cfg_add_file(pcms->fw_cfg, ACPI_BUILD_TPMLOG_FILE,
tables.tcpalog->data, acpi_data_len(tables.tcpalog));
vmgenid_dev = find_vmgenid_dev();
if (vmgenid_dev) {
vmgenid_add_fw_cfg(VMGENID(vmgenid_dev), pcms->fw_cfg,
tables.vmgenid);
}
if (!pcmc->rsdp_in_ram) {
/*
* Keep for compatibility with old machine types.