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Re: [PATCH v2 10/11] tpm_crb_sysbus: introduce TPM CRB SysBus device
|
From: |
Igor Mammedov |
|
Subject: |
Re: [PATCH v2 10/11] tpm_crb_sysbus: introduce TPM CRB SysBus device |
|
Date: |
Mon, 17 Jul 2023 16:23:31 +0200 |
On Fri, 14 Jul 2023 00:09:26 -0700
Joelle van Dyne <j@getutm.app> wrote:
> This SysBus variant of the CRB interface supports dynamically locating
> the MMIO interface so that Virt machines can use it. This interface
> is currently the only one supported by QEMU that works on Windows 11
> ARM64. We largely follow the TPM TIS SysBus device as a template.
>
> To try out this device with Windows 11 before OVMF is updated, you
> will need to modify `sysbud-fdt.c` and change the added line from:
>
> ```c
> TYPE_BINDING(TYPE_TPM_CRB_SYSBUS, no_fdt_node),
> ```
>
> to
>
> ```c
> TYPE_BINDING(TYPE_TPM_CRB_SYSBUS, add_tpm_tis_fdt_node),
> ```
>
> This change was not included because it can confuse Linux (although
> from testing, it seems like Linux is able to properly ignore the
> device from the TPM TIS driver and recognize it from the ACPI device
> in the TPM CRB driver). A proper fix would require OVMF to recognize
> the ACPI device and not depend on the FDT node for recognizing TPM.
>
> The command line to try out this device with SWTPM is:
>
> ```
> $ qemu-system-aarch64 \
> -chardev socket,id=chrtpm0,path=tpm.sock \
> -tpmdev emulator,id=tpm0,chardev=chrtpm0 \
> -device tpm-crb-device,tpmdev=tpm0
> ```
>
> along with SWTPM:
>
> ```
> $ swtpm \
> --ctrl type=unixio,path=tpm.sock,terminate \
> --tpmstate backend-uri=file://tpm.data \
> --tpm2
> ```
>
> Signed-off-by: Joelle van Dyne <j@getutm.app>
> ---
> docs/specs/tpm.rst | 1 +
> include/hw/acpi/aml-build.h | 1 +
> include/sysemu/tpm.h | 3 +
> hw/acpi/aml-build.c | 7 +-
> hw/arm/virt.c | 1 +
> hw/core/sysbus-fdt.c | 1 +
> hw/loongarch/virt.c | 1 +
> hw/riscv/virt.c | 1 +
> hw/tpm/tpm_crb_sysbus.c | 170 ++++++++++++++++++++++++++++++++++++
> hw/arm/Kconfig | 1 +
> hw/riscv/Kconfig | 1 +
> hw/tpm/Kconfig | 5 ++
> hw/tpm/meson.build | 2 +
> 13 files changed, 194 insertions(+), 1 deletion(-)
> create mode 100644 hw/tpm/tpm_crb_sysbus.c
>
> diff --git a/docs/specs/tpm.rst b/docs/specs/tpm.rst
> index 2bc29c9804..95aeb49220 100644
> --- a/docs/specs/tpm.rst
> +++ b/docs/specs/tpm.rst
> @@ -46,6 +46,7 @@ operating system.
> QEMU files related to TPM CRB interface:
> - ``hw/tpm/tpm_crb.c``
> - ``hw/tpm/tpm_crb_common.c``
> + - ``hw/tpm/tpm_crb_sysbus.c``
>
> SPAPR interface
> ---------------
> diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
> index d1fb08514b..9660e16148 100644
> --- a/include/hw/acpi/aml-build.h
> +++ b/include/hw/acpi/aml-build.h
> @@ -3,6 +3,7 @@
>
> #include "hw/acpi/acpi-defs.h"
> #include "hw/acpi/bios-linker-loader.h"
> +#include "exec/hwaddr.h"
>
> #define ACPI_BUILD_APPNAME6 "BOCHS "
> #define ACPI_BUILD_APPNAME8 "BXPC "
> diff --git a/include/sysemu/tpm.h b/include/sysemu/tpm.h
> index 66e3b45f30..f79c8f3575 100644
> --- a/include/sysemu/tpm.h
> +++ b/include/sysemu/tpm.h
> @@ -47,6 +47,7 @@ struct TPMIfClass {
> #define TYPE_TPM_TIS_ISA "tpm-tis"
> #define TYPE_TPM_TIS_SYSBUS "tpm-tis-device"
> #define TYPE_TPM_CRB "tpm-crb"
> +#define TYPE_TPM_CRB_SYSBUS "tpm-crb-device"
> #define TYPE_TPM_SPAPR "tpm-spapr"
> #define TYPE_TPM_TIS_I2C "tpm-tis-i2c"
>
> @@ -56,6 +57,8 @@ struct TPMIfClass {
> object_dynamic_cast(OBJECT(chr), TYPE_TPM_TIS_SYSBUS)
> #define TPM_IS_CRB(chr) \
> object_dynamic_cast(OBJECT(chr), TYPE_TPM_CRB)
> +#define TPM_IS_CRB_SYSBUS(chr) \
> + object_dynamic_cast(OBJECT(chr), TYPE_TPM_CRB_SYSBUS)
> #define TPM_IS_SPAPR(chr) \
> object_dynamic_cast(OBJECT(chr), TYPE_TPM_SPAPR)
> #define TPM_IS_TIS_I2C(chr) \
> diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
> index ea331a20d1..f809137fc9 100644
> --- a/hw/acpi/aml-build.c
> +++ b/hw/acpi/aml-build.c
> @@ -31,6 +31,7 @@
> #include "hw/pci/pci_bus.h"
> #include "hw/pci/pci_bridge.h"
> #include "qemu/cutils.h"
> +#include "qom/object.h"
>
> static GArray *build_alloc_array(void)
> {
> @@ -2218,7 +2219,7 @@ void build_tpm2(GArray *table_data, BIOSLinker *linker,
> GArray *tcpalog,
> {
> uint8_t start_method_params[12] = {};
> unsigned log_addr_offset;
> - uint64_t control_area_start_address;
> + uint64_t baseaddr, control_area_start_address;
> TPMIf *tpmif = tpm_find();
> uint32_t start_method;
> AcpiTable table = { .sig = "TPM2", .rev = 4,
> @@ -2236,6 +2237,10 @@ void build_tpm2(GArray *table_data, BIOSLinker
> *linker, GArray *tcpalog,
> } else if (TPM_IS_CRB(tpmif)) {
> control_area_start_address = TPM_CRB_ADDR_CTRL;
> start_method = TPM2_START_METHOD_CRB;
> + } else if (TPM_IS_CRB_SYSBUS(tpmif)) {
> + baseaddr = object_property_get_uint(OBJECT(tpmif), "baseaddr", NULL);
> + control_area_start_address = baseaddr + A_CRB_CTRL_REQ;
> + start_method = TPM2_START_METHOD_CRB;
> } else {
> g_assert_not_reached();
> }
> diff --git a/hw/arm/virt.c b/hw/arm/virt.c
> index 432148ef47..88e8b16103 100644
> --- a/hw/arm/virt.c
> +++ b/hw/arm/virt.c
> @@ -2977,6 +2977,7 @@ static void virt_machine_class_init(ObjectClass *oc,
> void *data)
> machine_class_allow_dynamic_sysbus_dev(mc, TYPE_VFIO_PLATFORM);
> #ifdef CONFIG_TPM
> machine_class_allow_dynamic_sysbus_dev(mc, TYPE_TPM_TIS_SYSBUS);
> + machine_class_allow_dynamic_sysbus_dev(mc, TYPE_TPM_CRB_SYSBUS);
> #endif
> mc->block_default_type = IF_VIRTIO;
> mc->no_cdrom = 1;
> diff --git a/hw/core/sysbus-fdt.c b/hw/core/sysbus-fdt.c
> index eebcd28f9a..9c783f88eb 100644
> --- a/hw/core/sysbus-fdt.c
> +++ b/hw/core/sysbus-fdt.c
> @@ -493,6 +493,7 @@ static const BindingEntry bindings[] = {
> #endif
> #ifdef CONFIG_TPM
> TYPE_BINDING(TYPE_TPM_TIS_SYSBUS, add_tpm_tis_fdt_node),
> + TYPE_BINDING(TYPE_TPM_CRB_SYSBUS, no_fdt_node),
> #endif
> TYPE_BINDING(TYPE_RAMFB_DEVICE, no_fdt_node),
> TYPE_BINDING("", NULL), /* last element */
> diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c
> index 9c536c52bc..eb59fb04ee 100644
> --- a/hw/loongarch/virt.c
> +++ b/hw/loongarch/virt.c
> @@ -1194,6 +1194,7 @@ static void loongarch_class_init(ObjectClass *oc, void
> *data)
> machine_class_allow_dynamic_sysbus_dev(mc, TYPE_RAMFB_DEVICE);
> #ifdef CONFIG_TPM
> machine_class_allow_dynamic_sysbus_dev(mc, TYPE_TPM_TIS_SYSBUS);
> + machine_class_allow_dynamic_sysbus_dev(mc, TYPE_TPM_CRB_SYSBUS);
> #endif
> }
>
> diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
> index d90286dc46..5d639a870a 100644
> --- a/hw/riscv/virt.c
> +++ b/hw/riscv/virt.c
> @@ -1681,6 +1681,7 @@ static void virt_machine_class_init(ObjectClass *oc,
> void *data)
> machine_class_allow_dynamic_sysbus_dev(mc, TYPE_RAMFB_DEVICE);
> #ifdef CONFIG_TPM
> machine_class_allow_dynamic_sysbus_dev(mc, TYPE_TPM_TIS_SYSBUS);
> + machine_class_allow_dynamic_sysbus_dev(mc, TYPE_TPM_CRB_SYSBUS);
> #endif
>
> if (tcg_enabled()) {
> diff --git a/hw/tpm/tpm_crb_sysbus.c b/hw/tpm/tpm_crb_sysbus.c
> new file mode 100644
> index 0000000000..66be57a532
> --- /dev/null
> +++ b/hw/tpm/tpm_crb_sysbus.c
> @@ -0,0 +1,170 @@
> +/*
> + * tpm_crb_sysbus.c - QEMU's TPM CRB interface emulator
> + *
> + * Copyright (c) 2018 Red Hat, Inc.
> + *
> + * Authors:
> + * Marc-André Lureau <marcandre.lureau@redhat.com>
> + *
> + * This work is licensed under the terms of the GNU GPL, version 2 or later.
> + * See the COPYING file in the top-level directory.
> + *
> + * tpm_crb is a device for TPM 2.0 Command Response Buffer (CRB) Interface
> + * as defined in TCG PC Client Platform TPM Profile (PTP) Specification
> + * Family “2.0” Level 00 Revision 01.03 v22
> + */
> +
> +#include "qemu/osdep.h"
> +#include "hw/acpi/acpi_aml_interface.h"
> +#include "hw/acpi/tpm.h"
> +#include "hw/qdev-properties.h"
> +#include "migration/vmstate.h"
> +#include "tpm_prop.h"
> +#include "hw/pci/pci_ids.h"
> +#include "hw/sysbus.h"
> +#include "qapi/visitor.h"
> +#include "qom/object.h"
> +#include "sysemu/tpm_util.h"
> +#include "trace.h"
> +#include "tpm_crb.h"
is it possible to weed off some unnecessary includes?
> +
> +struct TPMCRBStateSysBus {
> + /*< private >*/
> + SysBusDevice parent_obj;
> +
> + /*< public >*/
> + TPMCRBState state;
> + uint64_t baseaddr;
> + uint64_t size;
> +};
> +
> +OBJECT_DECLARE_SIMPLE_TYPE(TPMCRBStateSysBus, TPM_CRB_SYSBUS)
> +
> +static void tpm_crb_sysbus_request_completed(TPMIf *ti, int ret)
> +{
> + TPMCRBStateSysBus *s = TPM_CRB_SYSBUS(ti);
> +
> + return tpm_crb_request_completed(&s->state, ret);
> +}
> +
> +static enum TPMVersion tpm_crb_sysbus_get_tpm_version(TPMIf *ti)
> +{
> + TPMCRBStateSysBus *s = TPM_CRB_SYSBUS(ti);
> +
> + return tpm_crb_get_version(&s->state);
> +}
> +
> +static int tpm_crb_sysbus_pre_save(void *opaque)
> +{
> + TPMCRBStateSysBus *s = opaque;
> +
> + return tpm_crb_pre_save(&s->state);
> +}
> +
> +static const VMStateDescription vmstate_tpm_crb_sysbus = {
> + .name = "tpm-crb-sysbus",
> + .pre_save = tpm_crb_sysbus_pre_save,
> + .fields = (VMStateField[]) {
> + VMSTATE_END_OF_LIST(),
> + }
> +};
> +
> +static Property tpm_crb_sysbus_properties[] = {
> + DEFINE_PROP_TPMBE("tpmdev", TPMCRBStateSysBus, state.tpmbe),
> + DEFINE_PROP_UINT64("baseaddr", TPMCRBStateSysBus,
> + baseaddr, TPM_CRB_ADDR_BASE),
> + DEFINE_PROP_UINT64("size", TPMCRBStateSysBus, size, TPM_CRB_ADDR_SIZE),
> + DEFINE_PROP_END_OF_LIST(),
> +};
> +
> +static void tpm_crb_sysbus_initfn(Object *obj)
> +{
> + TPMCRBStateSysBus *s = TPM_CRB_SYSBUS(obj);
> +
> + tpm_crb_init_memory(obj, &s->state, NULL);
> +
> + sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->state.mmio);
> +}
> +
> +static void tpm_crb_sysbus_reset(DeviceState *dev)
> +{
> + TPMCRBStateSysBus *s = TPM_CRB_SYSBUS(dev);
> +
> + return tpm_crb_reset(&s->state, s->baseaddr);
> +}
> +
> +static void tpm_crb_sysbus_realizefn(DeviceState *dev, Error **errp)
> +{
> + TPMCRBStateSysBus *s = TPM_CRB_SYSBUS(dev);
> +
> + if (!tpm_find()) {
> + error_setg(errp, "at most one TPM device is permitted");
> + return;
> + }
> +
> + if (!s->state.tpmbe) {
> + error_setg(errp, "'tpmdev' property is required");
> + return;
> + }
above parts can be common with ISA vesion
> + if (tpm_crb_sysbus_get_tpm_version(TPM_IF(s)) != TPM_VERSION_2_0) {
> + error_setg(errp, "TPM CRB only supports TPM 2.0 backends");
> + return;
why ISA version doesn't require this?
> + }
> +}
> +
> +static void build_tpm_crb_sysbus_aml(AcpiDevAmlIf *adev, Aml *scope)
> +{
> + Aml *dev, *crs;
> + TPMCRBStateSysBus *s = TPM_CRB_SYSBUS(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(s->baseaddr, s->size,
> + AML_READ_WRITE));
> + aml_append(dev, aml_name_decl("_CRS", crs));
> + aml_append(scope, dev);
> +}
this almost matches isa version, modulo hard-codded address/size
(suggest to generalize and reuse it in both places)
and ppi, why sysbus variant doesn't implement PPI parts?
> +
> +static void tpm_crb_sysbus_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_crb_sysbus_properties);
> + dc->vmsd = &vmstate_tpm_crb_sysbus;
> + tc->model = TPM_MODEL_TPM_CRB;
> + dc->realize = tpm_crb_sysbus_realizefn;
> + dc->user_creatable = true;
> + dc->reset = tpm_crb_sysbus_reset;
> + tc->request_completed = tpm_crb_sysbus_request_completed;
> + tc->get_version = tpm_crb_sysbus_get_tpm_version;
> + set_bit(DEVICE_CATEGORY_MISC, dc->categories);
> + adevc->build_dev_aml = build_tpm_crb_sysbus_aml;
> +}
> +
> +static const TypeInfo tpm_crb_sysbus_info = {
> + .name = TYPE_TPM_CRB_SYSBUS,
> + .parent = TYPE_SYS_BUS_DEVICE,
> + .instance_size = sizeof(TPMCRBStateSysBus),
> + .instance_init = tpm_crb_sysbus_initfn,
> + .class_init = tpm_crb_sysbus_class_init,
> + .interfaces = (InterfaceInfo[]) {
> + { TYPE_TPM_IF },
> + { TYPE_ACPI_DEV_AML_IF },
> + { }
> + }
> +};
> +
> +static void tpm_crb_sysbus_register(void)
> +{
> + type_register_static(&tpm_crb_sysbus_info);
> +}
> +
> +type_init(tpm_crb_sysbus_register)
> diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
> index 7e68348440..efe1beaa7b 100644
> --- a/hw/arm/Kconfig
> +++ b/hw/arm/Kconfig
> @@ -5,6 +5,7 @@ config ARM_VIRT
> imply VFIO_AMD_XGBE
> imply VFIO_PLATFORM
> imply VFIO_XGMAC
> + imply TPM_CRB_SYSBUS
> imply TPM_TIS_SYSBUS
> imply TPM_TIS_I2C
> imply NVDIMM
> diff --git a/hw/riscv/Kconfig b/hw/riscv/Kconfig
> index b6a5eb4452..d824cb58f9 100644
> --- a/hw/riscv/Kconfig
> +++ b/hw/riscv/Kconfig
> @@ -29,6 +29,7 @@ config RISCV_VIRT
> imply PCI_DEVICES
> imply VIRTIO_VGA
> imply TEST_DEVICES
> + imply TPM_CRB_SYSBUS
> imply TPM_TIS_SYSBUS
> select RISCV_NUMA
> select GOLDFISH_RTC
> diff --git a/hw/tpm/Kconfig b/hw/tpm/Kconfig
> index 1fd73fe617..3f294a20ba 100644
> --- a/hw/tpm/Kconfig
> +++ b/hw/tpm/Kconfig
> @@ -25,6 +25,11 @@ config TPM_CRB
> depends on TPM && ISA_BUS
> select TPM_BACKEND
>
> +config TPM_CRB_SYSBUS
> + bool
> + depends on TPM
> + select TPM_BACKEND
> +
> config TPM_SPAPR
> bool
> default y
> diff --git a/hw/tpm/meson.build b/hw/tpm/meson.build
> index cb8204d5bc..d96de92c16 100644
> --- a/hw/tpm/meson.build
> +++ b/hw/tpm/meson.build
> @@ -4,6 +4,8 @@ system_ss.add(when: 'CONFIG_TPM_TIS_SYSBUS', if_true:
> files('tpm_tis_sysbus.c'))
> system_ss.add(when: 'CONFIG_TPM_TIS_I2C', if_true: files('tpm_tis_i2c.c'))
> system_ss.add(when: 'CONFIG_TPM_CRB', if_true: files('tpm_crb.c'))
> system_ss.add(when: 'CONFIG_TPM_CRB', if_true: files('tpm_crb_common.c'))
> +system_ss.add(when: 'CONFIG_TPM_CRB_SYSBUS', if_true:
> files('tpm_crb_sysbus.c'))
> +system_ss.add(when: 'CONFIG_TPM_CRB_SYSBUS', if_true:
> files('tpm_crb_common.c'))
> system_ss.add(when: 'CONFIG_TPM_TIS', if_true: files('tpm_ppi.c'))
> system_ss.add(when: 'CONFIG_TPM_CRB', if_true: files('tpm_ppi.c'))
>