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Thu, 15 Dec 2022 18:03:06 GMT Received: from smtpav06.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 296BD58059; Thu, 15 Dec 2022 18:03:06 +0000 (GMT) Received: from smtpav06.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 77BE558055; Thu, 15 Dec 2022 18:03:05 +0000 (GMT) Received: from lingrow.int.hansenpartnership.com (unknown [9.163.9.130]) by smtpav06.dal12v.mail.ibm.com (Postfix) with ESMTP; Thu, 15 Dec 2022 18:03:05 +0000 (GMT) From: James Bottomley To: qemu-devel@nongnu.org Cc: Stefan Berger , =?utf-8?q?Daniel_P_=2E_Berrang?= =?utf-8?q?=C3=A9?= , Markus Armbruster Subject: [PATCH 2/2] tpm: add backend for mssim Date: Thu, 15 Dec 2022 13:01:25 -0500 Message-Id: <20221215180125.24632-3-jejb@linux.ibm.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20221215180125.24632-1-jejb@linux.ibm.com> References: <20221215180125.24632-1-jejb@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-GUID: TIzUCddTtefbKOw2d1e7oe0ym5wvHrTi X-Proofpoint-ORIG-GUID: k-xQ8KcZU8EeYL8f-taBVaujFTCaAnFd X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.923,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-12-15_10,2022-12-15_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxlogscore=999 clxscore=1015 lowpriorityscore=0 spamscore=0 adultscore=0 bulkscore=0 phishscore=0 malwarescore=0 suspectscore=0 priorityscore=1501 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2212150145 Received-SPF: pass client-ip=148.163.158.5; envelope-from=jejb@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: James Bottomley The Microsoft Simulator (mssim) is the reference emulation platform for the TCG TPM 2.0 specification. https://github.com/Microsoft/ms-tpm-20-ref.git It exports a fairly simple network socket baset protocol on two sockets, one for command (default 2321) and one for control (default 2322). This patch adds a simple backend that can speak the mssim protocol over the network. It also allows the host, and two ports to be specified on the qemu command line. The benefits are twofold: firstly it gives us a backend that actually speaks a standard TPM emulation protocol instead of the linux specific TPM driver format of the current emulated TPM backend and secondly, using the microsoft protocol, the end point of the emulator can be anywhere on the network, facilitating the cloud use case where a central TPM service can be used over a control network. The implementation does basic control commands like power off/on, but doesn't implement cancellation or startup. The former because cancellation is pretty much useless on a fast operating TPM emulator and the latter because this emulator is designed to be used with OVMF which itself does TPM startup and I wanted to validate that. To run this, simply download an emulator based on the MS specification (package ibmswtpm2 on openSUSE) and run it, then add these two lines to the qemu command and it will use the emulator. -tpmdev mssim,id=tpm0 \ -device tpm-crb,tpmdev=tpm0 \ to use a remote emulator replace the first line with -tpmdev "{'type':'mssim','id':'tpm0','command':{'type':inet,'host':'remote','port':'2321'}}" tpm-tis also works as the backend. Signed-off-by: James Bottomley --- v2: convert to SocketAddr json and use qio_channel_socket_connect_sync() --- MAINTAINERS | 5 + backends/tpm/Kconfig | 5 + backends/tpm/meson.build | 1 + backends/tpm/tpm_mssim.c | 251 +++++++++++++++++++++++++++++++++++++++ backends/tpm/tpm_mssim.h | 43 +++++++ monitor/hmp-cmds.c | 7 ++ qapi/tpm.json | 25 +++- 7 files changed, 334 insertions(+), 3 deletions(-) create mode 100644 backends/tpm/tpm_mssim.c create mode 100644 backends/tpm/tpm_mssim.h diff --git a/MAINTAINERS b/MAINTAINERS index 6966490c94..a4a3bf9ab4 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3046,6 +3046,11 @@ F: backends/tpm/ F: tests/qtest/*tpm* T: git https://github.com/stefanberger/qemu-tpm.git tpm-next +MSSIM TPM Backend +M: James Bottomley +S: Maintained +F: backends/tpm/tpm_mssim.* + Checkpatch S: Odd Fixes F: scripts/checkpatch.pl diff --git a/backends/tpm/Kconfig b/backends/tpm/Kconfig index 5d91eb89c2..d6d6fa53e9 100644 --- a/backends/tpm/Kconfig +++ b/backends/tpm/Kconfig @@ -12,3 +12,8 @@ config TPM_EMULATOR bool default y depends on TPM_BACKEND + +config TPM_MSSIM + bool + default y + depends on TPM_BACKEND diff --git a/backends/tpm/meson.build b/backends/tpm/meson.build index 7f2503f84e..c7c3c79125 100644 --- a/backends/tpm/meson.build +++ b/backends/tpm/meson.build @@ -3,4 +3,5 @@ if have_tpm softmmu_ss.add(files('tpm_util.c')) softmmu_ss.add(when: 'CONFIG_TPM_PASSTHROUGH', if_true: files('tpm_passthrough.c')) softmmu_ss.add(when: 'CONFIG_TPM_EMULATOR', if_true: files('tpm_emulator.c')) + softmmu_ss.add(when: 'CONFIG_TPM_MSSIM', if_true: files('tpm_mssim.c')) endif diff --git a/backends/tpm/tpm_mssim.c b/backends/tpm/tpm_mssim.c new file mode 100644 index 0000000000..7c10ce2944 --- /dev/null +++ b/backends/tpm/tpm_mssim.c @@ -0,0 +1,251 @@ +/* + * Emulator TPM driver which connects over the mssim protocol + * SPDX-License-Identifier: GPL-2.0-or-later + * + * Copyright (c) 2022 + * Author: James Bottomley + */ + +#include "qemu/osdep.h" +#include "qemu/error-report.h" +#include "qemu/sockets.h" + +#include "qapi/clone-visitor.h" +#include "qapi/qapi-visit-tpm.h" + +#include "io/channel-socket.h" + +#include "sysemu/tpm_backend.h" +#include "sysemu/tpm_util.h" + +#include "qom/object.h" + +#include "tpm_int.h" +#include "tpm_mssim.h" + +#define ERROR_PREFIX "TPM mssim Emulator: " + +#define TYPE_TPM_MSSIM "tpm-mssim" +OBJECT_DECLARE_SIMPLE_TYPE(TPMmssim, TPM_MSSIM) + +struct TPMmssim { + TPMBackend parent; + + TpmTypeOptions *opts; + + QIOChannelSocket *cmd_qc, *ctrl_qc; +}; + +static int tpm_send_ctrl(TPMmssim *t, uint32_t cmd, Error **errp) +{ + int ret; + + cmd = htonl(cmd); + ret = qio_channel_write_all(QIO_CHANNEL(t->ctrl_qc), (char *)&cmd, sizeof(cmd), errp); + if (ret != 0) + return ret; + ret = qio_channel_read_all(QIO_CHANNEL(t->ctrl_qc), (char *)&cmd, sizeof(cmd), errp); + if (ret != 0) + return ret; + if (cmd != 0) { + error_setg(errp, ERROR_PREFIX "Incorrect ACK recieved on control channel 0x%x\n", cmd); + return -1; + } + return 0; +} + +static void tpm_mssim_instance_init(Object *obj) +{ +} + +static void tpm_mssim_instance_finalize(Object *obj) +{ + TPMmssim *t = TPM_MSSIM(obj); + + if (t->ctrl_qc) + tpm_send_ctrl(t, TPM_SIGNAL_POWER_OFF, NULL); + + object_unref(OBJECT(t->ctrl_qc)); + object_unref(OBJECT(t->cmd_qc)); +} + +static void tpm_mssim_cancel_cmd(TPMBackend *tb) +{ + return; +} + +static TPMVersion tpm_mssim_get_version(TPMBackend *tb) +{ + return TPM_VERSION_2_0; +} + +static size_t tpm_mssim_get_buffer_size(TPMBackend *tb) +{ + /* TCG standard profile max buffer size */ + return 4096; +} + +static TpmTypeOptions *tpm_mssim_get_opts(TPMBackend *tb) +{ + TPMmssim *t = TPM_MSSIM(tb); + TpmTypeOptions *opts; + + opts = QAPI_CLONE(TpmTypeOptions, t->opts); + + return opts; +} + +static void tpm_mssim_handle_request(TPMBackend *tb, TPMBackendCmd *cmd, + Error **errp) +{ + TPMmssim *t = TPM_MSSIM(tb); + uint32_t header, len; + uint8_t locality = cmd->locty; + struct iovec iov[4]; + int ret; + + header = htonl(TPM_SEND_COMMAND); + len = htonl(cmd->in_len); + + iov[0].iov_base = &header; + iov[0].iov_len = sizeof(header); + iov[1].iov_base = &locality; + iov[1].iov_len = sizeof(locality); + iov[2].iov_base = &len; + iov[2].iov_len = sizeof(len); + iov[3].iov_base = (void *)cmd->in; + iov[3].iov_len = cmd->in_len; + + ret = qio_channel_writev_all(QIO_CHANNEL(t->cmd_qc), iov, 4, errp); + if (ret != 0) + goto fail; + + ret = qio_channel_read_all(QIO_CHANNEL(t->cmd_qc), (char *)&len, sizeof(len), errp); + if (ret != 0) + goto fail; + len = ntohl(len); + if (len > cmd->out_len) { + error_setg(errp, "receive size is too large"); + goto fail; + } + ret = qio_channel_read_all(QIO_CHANNEL(t->cmd_qc), (char *)cmd->out, len, errp); + if (ret != 0) + goto fail; + /* ACK packet */ + ret = qio_channel_read_all(QIO_CHANNEL(t->cmd_qc), (char *)&header, sizeof(header), errp); + if (ret != 0) + goto fail; + if (header != 0) { + error_setg(errp, "incorrect ACK received on command channel 0x%x", len); + goto fail; + } + + return; + + fail: + error_prepend(errp, ERROR_PREFIX); + tpm_util_write_fatal_error_response(cmd->out, cmd->out_len); +} + +static TPMBackend *tpm_mssim_create(TpmTypeOptions *opts) +{ + TPMBackend *be = TPM_BACKEND(object_new(TYPE_TPM_MSSIM)); + TPMmssim *t = TPM_MSSIM(be); + int sock; + Error *errp = NULL; + TPMmssimOptions *mo = &opts->u.mssim; + + t->opts = opts; + if (!mo->has_command) { + mo->has_command = true; + mo->command = g_new0(SocketAddress, 1); + mo->command->type = SOCKET_ADDRESS_TYPE_INET; + mo->command->u.inet.host = g_strdup("localhost"); + mo->command->u.inet.port = g_strdup("2321"); + } + if (!mo->has_control) { + mo->has_control = true; + mo->control = g_new0(SocketAddress, 1); + mo->control->type = SOCKET_ADDRESS_TYPE_INET; + mo->control->u.inet.host = g_strdup(mo->command->u.inet.host); + mo->control->u.inet.port = g_strdup("2322"); + } + + t->cmd_qc = qio_channel_socket_new(); + t->ctrl_qc = qio_channel_socket_new(); + + if (qio_channel_socket_connect_sync(t->cmd_qc, mo->command, &errp) < 0) + goto fail; + + if (qio_channel_socket_connect_sync(t->ctrl_qc, mo->control, &errp) < 0) + goto fail; + + /* reset the TPM using a power cycle sequence, in case someone + * has previously powered it up */ + sock = tpm_send_ctrl(t, TPM_SIGNAL_POWER_OFF, &errp); + if (sock != 0) + goto fail; + sock = tpm_send_ctrl(t, TPM_SIGNAL_POWER_ON, &errp); + if (sock != 0) + goto fail; + sock = tpm_send_ctrl(t, TPM_SIGNAL_NV_ON, &errp); + if (sock != 0) + goto fail; + + return be; + + fail: + object_unref(OBJECT(t->ctrl_qc)); + object_unref(OBJECT(t->cmd_qc)); + t->ctrl_qc = NULL; + error_prepend(&errp, ERROR_PREFIX); + error_report_err(errp); + object_unref(OBJECT(be)); + + return NULL; +} + +static const QemuOptDesc tpm_mssim_cmdline_opts[] = { + TPM_STANDARD_CMDLINE_OPTS, + { + .name = "command", + .type = QEMU_OPT_STRING, + .help = "Command socket (default localhost:2321)", + }, + { + .name = "control", + .type = QEMU_OPT_STRING, + .help = "control socket (default localhost:2322)", + }, +}; + +static void tpm_mssim_class_init(ObjectClass *klass, void *data) +{ + TPMBackendClass *cl = TPM_BACKEND_CLASS(klass); + + cl->type = TPM_TYPE_MSSIM; + cl->opts = tpm_mssim_cmdline_opts; + cl->desc = "TPM mssim emulator backend driver"; + cl->create = tpm_mssim_create; + cl->cancel_cmd = tpm_mssim_cancel_cmd; + cl->get_tpm_version = tpm_mssim_get_version; + cl->get_buffer_size = tpm_mssim_get_buffer_size; + cl->get_tpm_options = tpm_mssim_get_opts; + cl->handle_request = tpm_mssim_handle_request; +} + +static const TypeInfo tpm_mssim_info = { + .name = TYPE_TPM_MSSIM, + .parent = TYPE_TPM_BACKEND, + .instance_size = sizeof(TPMmssim), + .class_init = tpm_mssim_class_init, + .instance_init = tpm_mssim_instance_init, + .instance_finalize = tpm_mssim_instance_finalize, +}; + +static void tpm_mssim_register(void) +{ + type_register_static(&tpm_mssim_info); +} + +type_init(tpm_mssim_register) diff --git a/backends/tpm/tpm_mssim.h b/backends/tpm/tpm_mssim.h new file mode 100644 index 0000000000..04a270338a --- /dev/null +++ b/backends/tpm/tpm_mssim.h @@ -0,0 +1,43 @@ +/* + * SPDX-License-Identifier: BSD-2-Clause + * + * The code below is copied from the Microsoft/TCG Reference implementation + * + * https://github.com/Microsoft/ms-tpm-20-ref.git + * + * In file TPMCmd/Simulator/include/TpmTcpProtocol.h + */ + +#define TPM_SIGNAL_POWER_ON 1 +#define TPM_SIGNAL_POWER_OFF 2 +#define TPM_SIGNAL_PHYS_PRES_ON 3 +#define TPM_SIGNAL_PHYS_PRES_OFF 4 +#define TPM_SIGNAL_HASH_START 5 +#define TPM_SIGNAL_HASH_DATA 6 + // {uint32_t BufferSize, uint8_t[BufferSize] Buffer} +#define TPM_SIGNAL_HASH_END 7 +#define TPM_SEND_COMMAND 8 + // {uint8_t Locality, uint32_t InBufferSize, uint8_t[InBufferSize] InBuffer} -> + // {uint32_t OutBufferSize, uint8_t[OutBufferSize] OutBuffer} + +#define TPM_SIGNAL_CANCEL_ON 9 +#define TPM_SIGNAL_CANCEL_OFF 10 +#define TPM_SIGNAL_NV_ON 11 +#define TPM_SIGNAL_NV_OFF 12 +#define TPM_SIGNAL_KEY_CACHE_ON 13 +#define TPM_SIGNAL_KEY_CACHE_OFF 14 + +#define TPM_REMOTE_HANDSHAKE 15 +#define TPM_SET_ALTERNATIVE_RESULT 16 + +#define TPM_SIGNAL_RESET 17 +#define TPM_SIGNAL_RESTART 18 + +#define TPM_SESSION_END 20 +#define TPM_STOP 21 + +#define TPM_GET_COMMAND_RESPONSE_SIZES 25 + +#define TPM_ACT_GET_SIGNALED 26 + +#define TPM_TEST_FAILURE_MODE 30 diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c index e99447ad68..319f9eeeb6 100644 --- a/monitor/hmp-cmds.c +++ b/monitor/hmp-cmds.c @@ -841,6 +841,7 @@ void hmp_info_tpm(Monitor *mon, const QDict *qdict) unsigned int c = 0; TPMPassthroughOptions *tpo; TPMEmulatorOptions *teo; + TPMmssimOptions *tmo; info_list = qmp_query_tpm(&err); if (err) { @@ -874,6 +875,12 @@ void hmp_info_tpm(Monitor *mon, const QDict *qdict) teo = &ti->options->u.emulator; monitor_printf(mon, ",chardev=%s", teo->chardev); break; + case TPM_TYPE_MSSIM: + tmo = &ti->options->u.mssim; + monitor_printf(mon, ",command=%s:%s,control=%s:%s", + tmo->command->u.inet.host, tmo->command->u.inet.port, + tmo->control->u.inet.host, tmo->control->u.inet.port); + break; case TPM_TYPE__MAX: break; } diff --git a/qapi/tpm.json b/qapi/tpm.json index d8cbd5ea0e..b773bde2ff 100644 --- a/qapi/tpm.json +++ b/qapi/tpm.json @@ -5,6 +5,7 @@ ## # = TPM (trusted platform module) devices ## +{ 'include': 'sockets.json' } ## # @TpmModel: @@ -49,7 +50,7 @@ # # Since: 1.5 ## -{ 'enum': 'TpmType', 'data': [ 'passthrough', 'emulator' ], +{ 'enum': 'TpmType', 'data': [ 'passthrough', 'emulator', 'mssim' ], 'if': 'CONFIG_TPM' } ## @@ -64,7 +65,7 @@ # Example: # # -> { "execute": "query-tpm-types" } -# <- { "return": [ "passthrough", "emulator" ] } +# <- { "return": [ "passthrough", "emulator", "mssim" ] } # ## { 'command': 'query-tpm-types', 'returns': ['TpmType'], @@ -99,6 +100,22 @@ { 'struct': 'TPMEmulatorOptions', 'data': { 'chardev' : 'str' }, 'if': 'CONFIG_TPM' } +## +# @TPMmssimOptions: +# +# Information for the mssim emulator connection +# +# @command: command socket for the TPM emulator +# @control: control socket for the TPM emulator +# +# Since: 7.2.0 +## +{ 'struct': 'TPMmssimOptions', + 'data': { + '*command': 'SocketAddress', + '*control': 'SocketAddress' }, + 'if': 'CONFIG_TPM' } + ## # @TpmTypeOptions: # @@ -107,6 +124,7 @@ # @id: identifier of the backend # @type: - 'passthrough' The configuration options for the TPM passthrough type # - 'emulator' The configuration options for TPM emulator backend type +# - 'mssim' The configuration options for TPM emulator mssim type # # Since: 1.5 ## @@ -115,7 +133,8 @@ 'id': 'str' }, 'discriminator': 'type', 'data': { 'passthrough' : 'TPMPassthroughOptions', - 'emulator': 'TPMEmulatorOptions' }, + 'emulator': 'TPMEmulatorOptions', + 'mssim': 'TPMmssimOptions' }, 'if': 'CONFIG_TPM' } ##