qemu

tpm_tis_isa.c (6178B)

---

 /*
  * tpm_tis_isa.c - QEMU's TPM TIS ISA Device
  *
  * Copyright (C) 2006,2010-2013 IBM Corporation
  *
  * Authors:
  *  Stefan Berger <stefanb@us.ibm.com>
  *  David Safford <safford@us.ibm.com>
  *
  * Xen 4 support: Andrease Niederl <andreas.niederl@iaik.tugraz.at>
  *
  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  * See the COPYING file in the top-level directory.
  *
  * Implementation of the TIS interface according to specs found at
  * http://www.trustedcomputinggroup.org. This implementation currently
  * supports version 1.3, 21 March 2013
  * In the developers menu choose the PC Client section then find the TIS
  * specification.
  *
  * TPM TIS for TPM 2 implementation following TCG PC Client Platform
  * TPM Profile (PTP) Specification, Familiy 2.0, Revision 00.43
  */
 
 #include "qemu/osdep.h"
 #include "hw/isa/isa.h"
 #include "hw/qdev-properties.h"
 #include "migration/vmstate.h"
 #include "hw/acpi/tpm.h"
 #include "tpm_prop.h"
 #include "tpm_tis.h"
 #include "qom/object.h"
 #include "hw/acpi/acpi_aml_interface.h"
 
 struct TPMStateISA {
     /*< private >*/
     ISADevice parent_obj;
 
     /*< public >*/
     TPMState state; /* not a QOM object */
 };
 
 OBJECT_DECLARE_SIMPLE_TYPE(TPMStateISA, TPM_TIS_ISA)
 
 static int tpm_tis_pre_save_isa(void *opaque)
 {
     TPMStateISA *isadev = opaque;
 
     return tpm_tis_pre_save(&isadev->state);
 }
 
 static const VMStateDescription vmstate_tpm_tis_isa = {
     .name = "tpm-tis",
     .version_id = 0,
     .pre_save  = tpm_tis_pre_save_isa,
     .fields = (VMStateField[]) {
         VMSTATE_BUFFER(state.buffer, TPMStateISA),
         VMSTATE_UINT16(state.rw_offset, TPMStateISA),
         VMSTATE_UINT8(state.active_locty, TPMStateISA),
         VMSTATE_UINT8(state.aborting_locty, TPMStateISA),
         VMSTATE_UINT8(state.next_locty, TPMStateISA),
 
         VMSTATE_STRUCT_ARRAY(state.loc, TPMStateISA, TPM_TIS_NUM_LOCALITIES, 0,
                              vmstate_locty, TPMLocality),
 
         VMSTATE_END_OF_LIST()
     }
 };
 
 static void tpm_tis_isa_request_completed(TPMIf *ti, int ret)
 {
     TPMStateISA *isadev = TPM_TIS_ISA(ti);
     TPMState *s = &isadev->state;
 
     tpm_tis_request_completed(s, ret);
 }
 
 static enum TPMVersion tpm_tis_isa_get_tpm_version(TPMIf *ti)
 {
     TPMStateISA *isadev = TPM_TIS_ISA(ti);
     TPMState *s = &isadev->state;
 
     return tpm_tis_get_tpm_version(s);
 }
 
 static void tpm_tis_isa_reset(DeviceState *dev)
 {
     TPMStateISA *isadev = TPM_TIS_ISA(dev);
     TPMState *s = &isadev->state;
 
     return tpm_tis_reset(s);
 }
 
 static Property tpm_tis_isa_properties[] = {
     DEFINE_PROP_UINT32("irq", TPMStateISA, state.irq_num, TPM_TIS_IRQ),
     DEFINE_PROP_TPMBE("tpmdev", TPMStateISA, state.be_driver),
     DEFINE_PROP_BOOL("ppi", TPMStateISA, state.ppi_enabled, true),
     DEFINE_PROP_END_OF_LIST(),
 };
 
 static void tpm_tis_isa_initfn(Object *obj)
 {
     TPMStateISA *isadev = TPM_TIS_ISA(obj);
     TPMState *s = &isadev->state;
 
     memory_region_init_io(&s->mmio, obj, &tpm_tis_memory_ops,
                           s, "tpm-tis-mmio",
                           TPM_TIS_NUM_LOCALITIES << TPM_TIS_LOCALITY_SHIFT);
 }
 
 static void tpm_tis_isa_realizefn(DeviceState *dev, Error **errp)
 {
     TPMStateISA *isadev = TPM_TIS_ISA(dev);
     TPMState *s = &isadev->state;
 
     if (!tpm_find()) {
         error_setg(errp, "at most one TPM device is permitted");
         return;
     }
 
     if (!s->be_driver) {
         error_setg(errp, "'tpmdev' property is required");
         return;
     }
     if (s->irq_num > 15) {
         error_setg(errp, "IRQ %d is outside valid range of 0 to 15",
                    s->irq_num);
         return;
     }
 
     s->irq = isa_get_irq(ISA_DEVICE(dev), s->irq_num);
 
     memory_region_add_subregion(isa_address_space(ISA_DEVICE(dev)),
                                 TPM_TIS_ADDR_BASE, &s->mmio);
 
     if (s->ppi_enabled) {
         tpm_ppi_init(&s->ppi, isa_address_space(ISA_DEVICE(dev)),
                      TPM_PPI_ADDR_BASE, OBJECT(dev));
     }
 }
 
 static void build_tpm_tis_isa_aml(AcpiDevAmlIf *adev, Aml *scope)
 {
     Aml *dev, *crs;
     TPMStateISA *isadev = TPM_TIS_ISA(adev);
     TPMIf *ti = TPM_IF(isadev);
 
     dev = aml_device("TPM");
     if (tpm_tis_isa_get_tpm_version(ti) == TPM_VERSION_2_0) {
         aml_append(dev, aml_name_decl("_HID", aml_string("MSFT0101")));
         aml_append(dev, aml_name_decl("_STR", aml_string("TPM 2.0 Device")));
     } else {
         aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0C31")));
     }
     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_TIS_ADDR_BASE, TPM_TIS_ADDR_SIZE,
                                       AML_READ_WRITE));
     /*
      * FIXME: TPM_TIS_IRQ=5 conflicts with PNP0C0F irqs,
      * fix default TPM_TIS_IRQ value there to use some unused IRQ
      */
     /* aml_append(crs, aml_irq_no_flags(isadev->state.irq_num)); */
     aml_append(dev, aml_name_decl("_CRS", crs));
     tpm_build_ppi_acpi(ti, dev);
     aml_append(scope, dev);
 }
 
 static void tpm_tis_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);
 
     device_class_set_props(dc, tpm_tis_isa_properties);
     dc->vmsd  = &vmstate_tpm_tis_isa;
     tc->model = TPM_MODEL_TPM_TIS;
     dc->realize = tpm_tis_isa_realizefn;
     dc->reset = tpm_tis_isa_reset;
     tc->request_completed = tpm_tis_isa_request_completed;
     tc->get_version = tpm_tis_isa_get_tpm_version;
     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
     adevc->build_dev_aml = build_tpm_tis_isa_aml;
 }
 
 static const TypeInfo tpm_tis_isa_info = {
     .name = TYPE_TPM_TIS_ISA,
     .parent = TYPE_ISA_DEVICE,
     .instance_size = sizeof(TPMStateISA),
     .instance_init = tpm_tis_isa_initfn,
     .class_init  = tpm_tis_isa_class_init,
     .interfaces = (InterfaceInfo[]) {
         { TYPE_TPM_IF },
         { TYPE_ACPI_DEV_AML_IF },
         { }
     }
 };
 
 static void tpm_tis_isa_register(void)
 {
     type_register_static(&tpm_tis_isa_info);
 }
 
 type_init(tpm_tis_isa_register)