[PATCH v2 06/11] tpm_crb: move ACPI table building to device interface

[Joelle van Dyne <j@getutm.app>]

This logic is similar to TPM TIS ISA device. Since TPM CRB can only
support TPM 2.0 backends, we check for this in realize.

Signed-off-by: Joelle van Dyne <j@getutm.app>
---
 hw/i386/acpi-build.c | 23 -----------------------
 hw/tpm/tpm_crb.c     | 29 +++++++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 23 deletions(-)

diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 9c74fa17ad..b767df39df 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1441,9 +1441,6 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
     uint32_t nr_mem = machine->ram_slots;
     int root_bus_limit = 0xFF;
     PCIBus *bus = NULL;
-#ifdef CONFIG_TPM
-    TPMIf *tpm = tpm_find();
-#endif
     bool cxl_present = false;
     int i;
     VMBusBridge *vmbus_bridge = vmbus_bridge_find();
@@ -1793,26 +1790,6 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
         }
     }
 
-#ifdef CONFIG_TPM
-    if (TPM_IS_CRB(tpm)) {
-        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")));
-        crs = aml_resource_template();
-        aml_append(crs, aml_memory32_fixed(TPM_CRB_ADDR_BASE,
-                                           TPM_CRB_ADDR_SIZE, AML_READ_WRITE));
-        aml_append(dev, aml_name_decl("_CRS", crs));
-
-        aml_append(dev, aml_name_decl("_STA", aml_int(0xf)));
-        aml_append(dev, aml_name_decl("_UID", aml_int(1)));
-
-        tpm_build_ppi_acpi(tpm, dev);
-
-        aml_append(sb_scope, dev);
-    }
-#endif
-
     if (pcms->sgx_epc.size != 0) {
         uint64_t epc_base = pcms->sgx_epc.base;
         uint64_t epc_size = pcms->sgx_epc.size;
diff --git a/hw/tpm/tpm_crb.c b/hw/tpm/tpm_crb.c
index 6144081d30..594696ffb8 100644
--- a/hw/tpm/tpm_crb.c
+++ b/hw/tpm/tpm_crb.c
@@ -19,6 +19,8 @@
 #include "qemu/module.h"
 #include "qapi/error.h"
 #include "exec/address-spaces.h"
+#include "hw/acpi/acpi_aml_interface.h"
+#include "hw/acpi/tpm.h"
 #include "hw/qdev-properties.h"
 #include "hw/pci/pci_ids.h"
 #include "hw/acpi/tpm.h"
@@ -99,6 +101,11 @@ static void tpm_crb_isa_realize(DeviceState *dev, Error **errp)
         return;
     }
 
+    if (tpm_crb_isa_get_version(TPM_IF(s)) != TPM_VERSION_2_0) {
+        error_setg(errp, "TPM CRB only supports TPM 2.0 backends");
+        return;
+    }
+
     tpm_crb_init_memory(OBJECT(s), &s->state, errp);
 
     memory_region_add_subregion(isa_address_space(ISA_DEVICE(dev)),
@@ -116,10 +123,30 @@ static void tpm_crb_isa_realize(DeviceState *dev, Error **errp)
     }
 }
 
+static void build_tpm_crb_isa_aml(AcpiDevAmlIf *adev, Aml *scope)
+{
+    Aml *dev, *crs;
+    CRBState *s = CRB(adev);
+    TPMIf *ti = TPM_IF(s);
+
+    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(1)));
+    aml_append(dev, aml_name_decl("_STA", aml_int(0xF)));
+    crs = aml_resource_template();
+    aml_append(crs, aml_memory32_fixed(TPM_CRB_ADDR_BASE, TPM_CRB_ADDR_SIZE,
+                                      AML_READ_WRITE));
+    aml_append(dev, aml_name_decl("_CRS", crs));
+    tpm_build_ppi_acpi(ti, dev);
+    aml_append(scope, dev);
+}
+
 static void tpm_crb_isa_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     TPMIfClass *tc = TPM_IF_CLASS(klass);
+    AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass);
 
     dc->realize = tpm_crb_isa_realize;
     device_class_set_props(dc, tpm_crb_isa_properties);
@@ -128,6 +155,7 @@ static void tpm_crb_isa_class_init(ObjectClass *klass, void *data)
     tc->model = TPM_MODEL_TPM_CRB;
     tc->get_version = tpm_crb_isa_get_version;
     tc->request_completed = tpm_crb_isa_request_completed;
+    adevc->build_dev_aml = build_tpm_crb_isa_aml;
 
     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 }
@@ -139,6 +167,7 @@ static const TypeInfo tpm_crb_isa_info = {
     .class_init  = tpm_crb_isa_class_init,
     .interfaces = (InterfaceInfo[]) {
         { TYPE_TPM_IF },
+        { TYPE_ACPI_DEV_AML_IF },
         { }
     }
 };
-- 
2.39.2 (Apple Git-143)