[PATCH] acpi: tpm: Add missing device identification objects

[Stefan Berger <stefanb@linux.vnet.ibm.com>]

Add missing device identification objects _STR and _UID. They will appear
as files 'description' and 'uid' under Linux sysfs.

Cc: Shannon Zhao <shannon.zhaosl@gmail.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Ani Sinha <ani@anisinha.ca>
Fixes: #708
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
---
 hw/arm/virt-acpi-build.c | 1 +
 hw/i386/acpi-build.c     | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index 674f902652..09456424aa 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -228,6 +228,7 @@ static void acpi_dsdt_add_tpm(Aml *scope, VirtMachineState *vms)
 
     Aml *dev = aml_device("TPM0");
     aml_append(dev, aml_name_decl("_HID", aml_string("MSFT0101")));
+    aml_append(dev, aml_name_decl("_STR", aml_string("TPM 2.0 Device")));
     aml_append(dev, aml_name_decl("_UID", aml_int(0)));
 
     Aml *crs = aml_resource_template();
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index a3ad6abd33..d6d3541407 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1808,6 +1808,10 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
                     dev = aml_device("TPM");
                     aml_append(dev, aml_name_decl("_HID",
                                                   aml_string("MSFT0101")));
+                    aml_append(dev,
+                               aml_name_decl("_STR",
+                                             aml_string("TPM 2.0 Device")));
+                    aml_append(dev, aml_name_decl("_UID", aml_int(0)));
                 } else {
                     dev = aml_device("ISA.TPM");
                     aml_append(dev, aml_name_decl("_HID",
-- 
2.31.1