[PATCH v2 3/3] hw/loongarch: Add TPM device for LoongArch virt machine

[Xiaojuan Yang]

Add TPM device for LoongArch virt machine, including
establish TPM acpi info and add TYPE_TPM_TIS_SYSBUS
to dynamic_sysbus_devices list.

Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
---
 hw/loongarch/acpi-build.c | 50 +++++++++++++++++++++++++++++++++++++--
 hw/loongarch/virt.c       |  4 ++++
 2 files changed, 52 insertions(+), 2 deletions(-)

diff --git a/hw/loongarch/acpi-build.c b/hw/loongarch/acpi-build.c
index 378a6d9d38..1d0e562435 100644
--- a/hw/loongarch/acpi-build.c
+++ b/hw/loongarch/acpi-build.c
@@ -31,6 +31,9 @@
 
 #include "hw/acpi/generic_event_device.h"
 #include "hw/pci-host/gpex.h"
+#include "sysemu/tpm.h"
+#include "hw/platform-bus.h"
+#include "hw/acpi/aml-build.h"
 
 #define ACPI_BUILD_ALIGN_SIZE             0x1000
 #define ACPI_BUILD_TABLE_SIZE             0x20000
@@ -275,6 +278,41 @@ static void build_pci_device_aml(Aml *scope, 
LoongArchMachineState *lams)
     acpi_dsdt_add_gpex(scope, &cfg);
 }
 
+#ifdef CONFIG_TPM
+static void acpi_dsdt_add_tpm(Aml *scope, LoongArchMachineState *vms)
+{
+    PlatformBusDevice *pbus = PLATFORM_BUS_DEVICE(vms->platform_bus_dev);
+    hwaddr pbus_base = VIRT_PLATFORM_BUS_BASEADDRESS;
+    SysBusDevice *sbdev = SYS_BUS_DEVICE(tpm_find());
+    MemoryRegion *sbdev_mr;
+    hwaddr tpm_base;
+
+    if (!sbdev) {
+        return;
+    }
+
+    tpm_base = platform_bus_get_mmio_addr(pbus, sbdev, 0);
+    assert(tpm_base != -1);
+
+    tpm_base += pbus_base;
+
+    sbdev_mr = sysbus_mmio_get_region(sbdev, 0);
+
+    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();
+    aml_append(crs,
+               aml_memory32_fixed(tpm_base,
+                                  (uint32_t)memory_region_size(sbdev_mr),
+                                  AML_READ_WRITE));
+    aml_append(dev, aml_name_decl("_CRS", crs));
+    aml_append(scope, dev);
+}
+#endif
+
 /* build DSDT */
 static void
 build_dsdt(GArray *table_data, BIOSLinker *linker, MachineState *machine)
@@ -289,7 +327,9 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, 
MachineState *machine)
     build_uart_device_aml(dsdt);
     build_pci_device_aml(dsdt, lams);
     build_la_ged_aml(dsdt, machine);
-
+#ifdef CONFIG_TPM
+    acpi_dsdt_add_tpm(dsdt, lams);
+#endif
     /* System State Package */
     scope = aml_scope("\\");
     pkg = aml_package(4);
@@ -358,7 +398,13 @@ static void acpi_build(AcpiBuildTables *tables, 
MachineState *machine)
         build_mcfg(tables_blob, tables->linker, &mcfg, lams->oem_id,
                    lams->oem_table_id);
     }
-
+    /* TPM info */
+    if (tpm_get_version(tpm_find()) == TPM_VERSION_2_0) {
+        acpi_add_table(table_offsets, tables_blob);
+        build_tpm2(tables_blob, tables->linker,
+                   tables->tcpalog, lams->oem_id,
+                   lams->oem_table_id);
+    }
     /* Add tables supplied by user (if any) */
     for (u = acpi_table_first(); u; u = acpi_table_next(u)) {
         unsigned len = acpi_table_len(u);
diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c
index eed9d591e7..c1612d5e05 100644
--- a/hw/loongarch/virt.c
+++ b/hw/loongarch/virt.c
@@ -41,6 +41,7 @@
 #include "hw/platform-bus.h"
 #include "hw/display/ramfb.h"
 #include "hw/mem/pc-dimm.h"
+#include "sysemu/tpm.h"
 
 static void fdt_add_rtc_node(LoongArchMachineState *lams)
 {
@@ -993,6 +994,9 @@ static void loongarch_class_init(ObjectClass *oc, void 
*data)
     object_class_property_set_description(oc, "acpi",
         "Enable ACPI");
     machine_class_allow_dynamic_sysbus_dev(mc, TYPE_RAMFB_DEVICE);
+#ifdef CONFIG_TPM
+    machine_class_allow_dynamic_sysbus_dev(mc, TYPE_TPM_TIS_SYSBUS);
+#endif
 }
 
 static const TypeInfo loongarch_machine_types[] = {
-- 
2.31.1