[PATCH v5 0/2] tpm: add mssim backend

[PATCH v5 0/2] tpm: add mssim backend

[James Bottomley]

From: James Bottomley <James.Bottomley@HansenPartnership.com>

The requested feedback was to convert the tpmdev handler to being json
based, which requires rethreading all the backends.  The good news is
this reduced quite a bit of code (especially as I converted it to
error_fatal handling as well, which removes the return status
threading).  The bad news is I can't test any of the conversions.
swtpm still isn't building on opensuse and, apparently, passthrough
doesn't like my native TPM because it doesn't allow cancellation.

v3 pulls out more unneeded code in the visitor conversion, makes
migration work on external state preservation of the simulator and
adds documentation

v4 puts back the wrapper options (but doesn't add any for mssim since
it post dates the necessity)

v5 rebases to the latest master branch and adjusts for removed use_FOO ptrs

James

---

James Bottomley (2):
  tpm: convert tpmdev options processing to new visitor format
  tpm: add backend for mssim

 MAINTAINERS                    |   6 +
 backends/tpm/Kconfig           |   5 +
 backends/tpm/meson.build       |   1 +
 backends/tpm/tpm_emulator.c    |  24 ++-
 backends/tpm/tpm_mssim.c       | 263 +++++++++++++++++++++++++++++++++
 backends/tpm/tpm_mssim.h       |  43 ++++++
 backends/tpm/tpm_passthrough.c |  25 +---
 docs/specs/tpm.rst             |  35 +++++
 include/sysemu/tpm.h           |   4 +-
 include/sysemu/tpm_backend.h   |   2 +-
 monitor/hmp-cmds.c             |   7 +
 qapi/tpm.json                  |  45 +++++-
 softmmu/tpm.c                  |  90 +++++------
 softmmu/vl.c                   |  19 +--
 14 files changed, 459 insertions(+), 110 deletions(-)
 create mode 100644 backends/tpm/tpm_mssim.c
 create mode 100644 backends/tpm/tpm_mssim.h

-- 
2.35.3

[PATCH v5 1/2] tpm: convert tpmdev options processing to new visitor format

[James Bottomley]

From: James Bottomley <James.Bottomley@HansenPartnership.com>

Instead of processing the tpmdev options using the old qemu options,
convert to the new visitor format which also allows the passing of
json on the command line.

Signed-off-by: James Bottomley <jejb@linux.ibm.com>

---
v4: add TpmConfiOptions
---
 backends/tpm/tpm_emulator.c    | 24 ++++-----
 backends/tpm/tpm_passthrough.c | 25 +++-------
 include/sysemu/tpm.h           |  4 +-
 include/sysemu/tpm_backend.h   |  2 +-
 qapi/tpm.json                  | 19 +++++++
 softmmu/tpm.c                  | 90 ++++++++++++++--------------------
 softmmu/vl.c                   | 19 +------
 7 files changed, 76 insertions(+), 107 deletions(-)

diff --git a/backends/tpm/tpm_emulator.c b/backends/tpm/tpm_emulator.c
index 49cc3d749d..cb6bf9d7c2 100644
--- a/backends/tpm/tpm_emulator.c
+++ b/backends/tpm/tpm_emulator.c
@@ -584,33 +584,28 @@ err_exit:
     return -1;
 }
 
-static int tpm_emulator_handle_device_opts(TPMEmulator *tpm_emu, QemuOpts *opts)
+static int tpm_emulator_handle_device_opts(TPMEmulator *tpm_emu, TpmCreateOptions *opts)
 {
-    const char *value;
     Error *err = NULL;
     Chardev *dev;
 
-    value = qemu_opt_get(opts, "chardev");
-    if (!value) {
-        error_report("tpm-emulator: parameter 'chardev' is missing");
-        goto err;
-    }
+    tpm_emu->options = QAPI_CLONE(TPMEmulatorOptions, &opts->u.emulator);
+    tpm_emu->data_ioc = NULL;
 
-    dev = qemu_chr_find(value);
+    dev = qemu_chr_find(opts->u.emulator.chardev);
     if (!dev) {
-        error_report("tpm-emulator: tpm chardev '%s' not found", value);
+        error_report("tpm-emulator: tpm chardev '%s' not found",
+                opts->u.emulator.chardev);
         goto err;
     }
 
     if (!qemu_chr_fe_init(&tpm_emu->ctrl_chr, dev, &err)) {
         error_prepend(&err, "tpm-emulator: No valid chardev found at '%s':",
-                      value);
+                      opts->u.emulator.chardev);
         error_report_err(err);
         goto err;
     }
 
-    tpm_emu->options->chardev = g_strdup(value);
-
     if (tpm_emulator_prepare_data_fd(tpm_emu) < 0) {
         goto err;
     }
@@ -649,7 +644,7 @@ err:
     return -1;
 }
 
-static TPMBackend *tpm_emulator_create(QemuOpts *opts)
+static TPMBackend *tpm_emulator_create(TpmCreateOptions *opts)
 {
     TPMBackend *tb = TPM_BACKEND(object_new(TYPE_TPM_EMULATOR));
 
@@ -972,7 +967,6 @@ static void tpm_emulator_inst_init(Object *obj)
 
     trace_tpm_emulator_inst_init();
 
-    tpm_emu->options = g_new0(TPMEmulatorOptions, 1);
     tpm_emu->cur_locty_number = ~0;
     qemu_mutex_init(&tpm_emu->mutex);
     tpm_emu->vmstate =
@@ -990,7 +984,7 @@ static void tpm_emulator_shutdown(TPMEmulator *tpm_emu)
 {
     ptm_res res;
 
-    if (!tpm_emu->options->chardev) {
+    if (!tpm_emu->data_ioc) {
         /* was never properly initialized */
         return;
     }
diff --git a/backends/tpm/tpm_passthrough.c b/backends/tpm/tpm_passthrough.c
index 179697a3a9..4a30143257 100644
--- a/backends/tpm/tpm_passthrough.c
+++ b/backends/tpm/tpm_passthrough.c
@@ -252,21 +252,11 @@ static int tpm_passthrough_open_sysfs_cancel(TPMPassthruState *tpm_pt)
 }
 
 static int
-tpm_passthrough_handle_device_opts(TPMPassthruState *tpm_pt, QemuOpts *opts)
+tpm_passthrough_handle_device_opts(TPMPassthruState *tpm_pt, TpmCreateOptions *opts)
 {
-    const char *value;
+    tpm_pt->options = QAPI_CLONE(TPMPassthroughOptions, &opts->u.passthrough);
 
-    value = qemu_opt_get(opts, "cancel-path");
-    if (value) {
-        tpm_pt->options->cancel_path = g_strdup(value);
-    }
-
-    value = qemu_opt_get(opts, "path");
-    if (value) {
-        tpm_pt->options->path = g_strdup(value);
-    }
-
-    tpm_pt->tpm_dev = value ? value : TPM_PASSTHROUGH_DEFAULT_DEVICE;
+    tpm_pt->tpm_dev = opts->u.passthrough.path ? opts->u.passthrough.path : TPM_PASSTHROUGH_DEFAULT_DEVICE;
     tpm_pt->tpm_fd = qemu_open_old(tpm_pt->tpm_dev, O_RDWR);
     if (tpm_pt->tpm_fd < 0) {
         error_report("Cannot access TPM device using '%s': %s",
@@ -288,11 +278,11 @@ tpm_passthrough_handle_device_opts(TPMPassthruState *tpm_pt, QemuOpts *opts)
     return 0;
 }
 
-static TPMBackend *tpm_passthrough_create(QemuOpts *opts)
+static TPMBackend *tpm_passthrough_create(TpmCreateOptions *tco)
 {
     Object *obj = object_new(TYPE_TPM_PASSTHROUGH);
 
-    if (tpm_passthrough_handle_device_opts(TPM_PASSTHROUGH(obj), opts)) {
+    if (tpm_passthrough_handle_device_opts(TPM_PASSTHROUGH(obj), tco)) {
         object_unref(obj);
         return NULL;
     }
@@ -319,8 +309,8 @@ static TpmTypeOptions *tpm_passthrough_get_tpm_options(TPMBackend *tb)
     TpmTypeOptions *options = g_new0(TpmTypeOptions, 1);
 
     options->type = TPM_TYPE_PASSTHROUGH;
-    options->u.passthrough.data = QAPI_CLONE(TPMPassthroughOptions,
-                                             TPM_PASSTHROUGH(tb)->options);
+
+    options->u.passthrough.data = QAPI_CLONE(TPMPassthroughOptions, TPM_PASSTHROUGH(tb)->options);
 
     return options;
 }
@@ -344,7 +334,6 @@ static void tpm_passthrough_inst_init(Object *obj)
 {
     TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(obj);
 
-    tpm_pt->options = g_new0(TPMPassthroughOptions, 1);
     tpm_pt->tpm_fd = -1;
     tpm_pt->cancel_fd = -1;
 }
diff --git a/include/sysemu/tpm.h b/include/sysemu/tpm.h
index fb40e30ff6..d00a833a21 100644
--- a/include/sysemu/tpm.h
+++ b/include/sysemu/tpm.h
@@ -17,8 +17,8 @@
 
 #ifdef CONFIG_TPM
 
-int tpm_config_parse(QemuOptsList *opts_list, const char *optarg);
-int tpm_init(void);
+void tpm_config_parse(const char *optarg);
+void tpm_init(void);
 void tpm_cleanup(void);
 
 typedef enum TPMVersion {
diff --git a/include/sysemu/tpm_backend.h b/include/sysemu/tpm_backend.h
index 8fd3269c11..846a9e39fa 100644
--- a/include/sysemu/tpm_backend.h
+++ b/include/sysemu/tpm_backend.h
@@ -57,7 +57,7 @@ struct TPMBackendClass {
     /* get a descriptive text of the backend to display to the user */
     const char *desc;
 
-    TPMBackend *(*create)(QemuOpts *opts);
+    TPMBackend *(*create)(TpmCreateOptions *tco);
 
     /* start up the TPM on the backend - optional */
     int (*startup_tpm)(TPMBackend *t, size_t buffersize);
diff --git a/qapi/tpm.json b/qapi/tpm.json
index 4e2ea9756a..2b491c28b4 100644
--- a/qapi/tpm.json
+++ b/qapi/tpm.json
@@ -134,6 +134,25 @@
             'emulator': 'TPMEmulatorOptionsWrapper' },
   'if': 'CONFIG_TPM' }
 
+##
+# @TpmCreateOptions:
+#
+# A union referencing different TPM backend types' configuration options
+#   without the wrapper to be usable by visitors.
+#
+# @type: - 'passthrough' The configuration options for the TPM passthrough type
+#        - 'emulator' The configuration options for TPM emulator backend type
+#
+# Since: 7.2
+##
+{ 'union': 'TpmCreateOptions',
+  'base': { 'type': 'TpmType',
+            'id' : 'str' },
+  'discriminator': 'type',
+  'data': { 'passthrough' : 'TPMPassthroughOptions',
+            'emulator': 'TPMEmulatorOptions' },
+  'if': 'CONFIG_TPM' }
+
 ##
 # @TPMInfo:
 #
diff --git a/softmmu/tpm.c b/softmmu/tpm.c
index 578563f05a..699c46d3ae 100644
--- a/softmmu/tpm.c
+++ b/softmmu/tpm.c
@@ -17,14 +17,26 @@
 #include "qapi/error.h"
 #include "qapi/qapi-commands-tpm.h"
 #include "qapi/qmp/qerror.h"
+#include "qapi/qobject-input-visitor.h"
+#include "qapi/qapi-visit-tpm.h"
 #include "sysemu/tpm_backend.h"
 #include "sysemu/tpm.h"
 #include "qemu/config-file.h"
 #include "qemu/error-report.h"
+#include "qemu/help_option.h"
 
 static QLIST_HEAD(, TPMBackend) tpm_backends =
     QLIST_HEAD_INITIALIZER(tpm_backends);
 
+typedef struct TpmCreateOptionsQueueEntry {
+        TpmCreateOptions *tco;
+        QSIMPLEQ_ENTRY(TpmCreateOptionsQueueEntry) entry;
+} TpmCreateOptionsQueueEntry;
+
+typedef QSIMPLEQ_HEAD(, TpmCreateOptionsQueueEntry) TpmCreateOptionsQueue;
+
+static TpmCreateOptionsQueue tco_queue = QSIMPLEQ_HEAD_INITIALIZER(tco_queue);
+
 static const TPMBackendClass *
 tpm_be_find_by_type(enum TpmType type)
 {
@@ -84,63 +96,31 @@ TPMBackend *qemu_find_tpm_be(const char *id)
     return NULL;
 }
 
-static int tpm_init_tpmdev(void *dummy, QemuOpts *opts, Error **errp)
+static void tpm_init_tpmdev(TpmCreateOptions *tco)
 {
-    /*
-     * Use of error_report() in a function with an Error ** parameter
-     * is suspicious.  It is okay here.  The parameter only exists to
-     * make the function usable with qemu_opts_foreach().  It is not
-     * actually used.
-     */
-    const char *value;
-    const char *id;
     const TPMBackendClass *be;
     TPMBackend *drv;
-    Error *local_err = NULL;
-    int i;
 
     if (!QLIST_EMPTY(&tpm_backends)) {
         error_report("Only one TPM is allowed.");
-        return 1;
+        exit(1);
     }
 
-    id = qemu_opts_id(opts);
-    if (id == NULL) {
-        error_report(QERR_MISSING_PARAMETER, "id");
-        return 1;
-    }
-
-    value = qemu_opt_get(opts, "type");
-    if (!value) {
-        error_report(QERR_MISSING_PARAMETER, "type");
-        tpm_display_backend_drivers();
-        return 1;
-    }
-
-    i = qapi_enum_parse(&TpmType_lookup, value, -1, NULL);
-    be = i >= 0 ? tpm_be_find_by_type(i) : NULL;
+    be = tco->type >= 0 ? tpm_be_find_by_type(tco->type) : NULL;
     if (be == NULL) {
         error_report(QERR_INVALID_PARAMETER_VALUE,
                      "type", "a TPM backend type");
         tpm_display_backend_drivers();
-        return 1;
-    }
-
-    /* validate backend specific opts */
-    if (!qemu_opts_validate(opts, be->opts, &local_err)) {
-        error_report_err(local_err);
-        return 1;
+        exit(1);
     }
 
-    drv = be->create(opts);
+    drv = be->create(tco);
     if (!drv) {
-        return 1;
+        exit(1);
     }
 
-    drv->id = g_strdup(id);
+    drv->id = g_strdup(tco->id);
     QLIST_INSERT_HEAD(&tpm_backends, drv, list);
-
-    return 0;
 }
 
 /*
@@ -161,33 +141,35 @@ void tpm_cleanup(void)
  * Initialize the TPM. Process the tpmdev command line options describing the
  * TPM backend.
  */
-int tpm_init(void)
+void tpm_init(void)
 {
-    if (qemu_opts_foreach(qemu_find_opts("tpmdev"),
-                          tpm_init_tpmdev, NULL, NULL)) {
-        return -1;
-    }
+    while (!QSIMPLEQ_EMPTY(&tco_queue)) {
+        TpmCreateOptionsQueueEntry *tcoqe = QSIMPLEQ_FIRST(&tco_queue);
 
-    return 0;
+        QSIMPLEQ_REMOVE_HEAD(&tco_queue, entry);
+        tpm_init_tpmdev(tcoqe->tco);
+        g_free(tcoqe);
+    }
 }
 
 /*
  * Parse the TPM configuration options.
  * To display all available TPM backends the user may use '-tpmdev help'
  */
-int tpm_config_parse(QemuOptsList *opts_list, const char *optarg)
+void tpm_config_parse(const char *optarg)
 {
-    QemuOpts *opts;
+    Visitor *v;
+    TpmCreateOptionsQueueEntry *tcqe;
 
-    if (!strcmp(optarg, "help")) {
+    if (is_help_option(optarg)) {
         tpm_display_backend_drivers();
-        return -1;
-    }
-    opts = qemu_opts_parse_noisily(opts_list, optarg, true);
-    if (!opts) {
-        return -1;
+        return;
     }
-    return 0;
+    v = qobject_input_visitor_new_str(optarg, "type", &error_fatal);
+    tcqe = g_new(TpmCreateOptionsQueueEntry, 1);
+    visit_type_TpmCreateOptions(v, NULL, &tcqe->tco, &error_fatal);
+    visit_free(v);
+    QSIMPLEQ_INSERT_TAIL(&tco_queue, tcqe, entry);
 }
 
 /*
diff --git a/softmmu/vl.c b/softmmu/vl.c
index 798e1dc933..8c2655dbc2 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -328,16 +328,6 @@ static QemuOptsList qemu_object_opts = {
     },
 };
 
-static QemuOptsList qemu_tpmdev_opts = {
-    .name = "tpmdev",
-    .implied_opt_name = "type",
-    .head = QTAILQ_HEAD_INITIALIZER(qemu_tpmdev_opts.head),
-    .desc = {
-        /* options are defined in the TPM backends */
-        { /* end of list */ }
-    },
-};
-
 static QemuOptsList qemu_overcommit_opts = {
     .name = "overcommit",
     .head = QTAILQ_HEAD_INITIALIZER(qemu_overcommit_opts.head),
@@ -1934,9 +1924,7 @@ static void qemu_create_late_backends(void)
 
     object_option_foreach_add(object_create_late);
 
-    if (tpm_init() < 0) {
-        exit(1);
-    }
+    tpm_init();
 
     qemu_opts_foreach(qemu_find_opts("mon"),
                       mon_init_func, NULL, &error_fatal);
@@ -2658,7 +2646,6 @@ void qemu_init(int argc, char **argv)
     qemu_add_opts(&qemu_boot_opts);
     qemu_add_opts(&qemu_add_fd_opts);
     qemu_add_opts(&qemu_object_opts);
-    qemu_add_opts(&qemu_tpmdev_opts);
     qemu_add_opts(&qemu_overcommit_opts);
     qemu_add_opts(&qemu_msg_opts);
     qemu_add_opts(&qemu_name_opts);
@@ -2906,9 +2893,7 @@ void qemu_init(int argc, char **argv)
                 break;
 #ifdef CONFIG_TPM
             case QEMU_OPTION_tpmdev:
-                if (tpm_config_parse(qemu_find_opts("tpmdev"), optarg) < 0) {
-                    exit(1);
-                }
+                tpm_config_parse(optarg);
                 break;
 #endif
             case QEMU_OPTION_mempath:
-- 
2.35.3

[PATCH v5 2/2] tpm: add backend for mssim

[James Bottomley]

From: James Bottomley <James.Bottomley@HansenPartnership.com>

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 based 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 two sockets to be
specified on the 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 <jejb@linux.ibm.com>

---

v2: convert to SocketAddr json and use qio_channel_socket_connect_sync()
v3: gate control power off by migration state keep control socket disconnected
    to test outside influence and add docs.
---
 MAINTAINERS              |   6 +
 backends/tpm/Kconfig     |   5 +
 backends/tpm/meson.build |   1 +
 backends/tpm/tpm_mssim.c | 263 +++++++++++++++++++++++++++++++++++++++
 backends/tpm/tpm_mssim.h |  43 +++++++
 docs/specs/tpm.rst       |  35 ++++++
 monitor/hmp-cmds.c       |   7 ++
 qapi/tpm.json            |  28 ++++-
 8 files changed, 384 insertions(+), 4 deletions(-)
 create mode 100644 backends/tpm/tpm_mssim.c
 create mode 100644 backends/tpm/tpm_mssim.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 7a40d4d865..666ca1eb1c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3063,10 +3063,16 @@ F: include/hw/acpi/tpm.h
 F: include/sysemu/tpm*
 F: qapi/tpm.json
 F: backends/tpm/
+X: backends/tpm/tpm_mssim.*
 F: tests/qtest/*tpm*
 F: docs/specs/tpm.rst
 T: git https://github.com/stefanberger/qemu-tpm.git tpm-next
 
+MSSIM TPM Backend
+M: James Bottomley <jejb@linux.ibm.com>
+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..75dce165b8
--- /dev/null
+++ b/backends/tpm/tpm_mssim.c
@@ -0,0 +1,263 @@
+/*
+ * Emulator TPM driver which connects over the mssim protocol
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * Copyright (c) 2022
+ * Author: James Bottomley <jejb@linux.ibm.com>
+ */
+
+#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/runstate.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;
+
+    TPMmssimOptions opts;
+
+    QIOChannelSocket *cmd_qc, *ctrl_qc;
+};
+
+static int tpm_send_ctrl(TPMmssim *t, uint32_t cmd, Error **errp)
+{
+    int ret;
+
+    qio_channel_socket_connect_sync(t->ctrl_qc, t->opts.control, errp);
+    cmd = htonl(cmd);
+    ret = qio_channel_write_all(QIO_CHANNEL(t->ctrl_qc), (char *)&cmd, sizeof(cmd), errp);
+    if (ret != 0)
+        goto out;
+    ret = qio_channel_read_all(QIO_CHANNEL(t->ctrl_qc), (char *)&cmd, sizeof(cmd), errp);
+    if (ret != 0)
+        goto out;
+    if (cmd != 0) {
+        error_setg(errp, ERROR_PREFIX "Incorrect ACK recieved on control channel 0x%x\n", cmd);
+        ret = -1;
+    }
+ out:
+    qio_channel_close(QIO_CHANNEL(t->ctrl_qc), errp);
+    return ret;
+}
+
+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 && !runstate_check(RUN_STATE_INMIGRATE))
+        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 = g_new0(TpmTypeOptions, 1);
+
+    opts->type = TPM_TYPE_MSSIM;
+    opts->u.mssim = 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(TpmCreateOptions *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;
+
+    if (!mo->command) {
+            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->control) {
+            int port;
+
+            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);
+            /* in the reference implementation, the control port is
+             * always one above the command port */
+            port = atoi(mo->command->u.inet.port) + 1;
+            mo->control->u.inet.port = g_strdup_printf("%d", port);
+    }
+
+    t->opts = opts->u.mssim;
+    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;
+    qio_channel_close(QIO_CHANNEL(t->ctrl_qc), &errp);
+
+    if (!runstate_check(RUN_STATE_INMIGRATE)) {
+        /* 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;
+    t->cmd_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/docs/specs/tpm.rst b/docs/specs/tpm.rst
index 535912a92b..1398735956 100644
--- a/docs/specs/tpm.rst
+++ b/docs/specs/tpm.rst
@@ -270,6 +270,38 @@ available as a module (assuming a TPM 2 is passed through):
   /sys/devices/LNXSYSTEM:00/LNXSYBUS:00/MSFT0101:00/tpm/tpm0/pcr-sha256/9
   ...
 
+The QEMU TPM Microsoft Simulator Device
+---------------------------------------
+
+The TCG provides a reference implementation for TPM 2.0 written by
+Microsoft (See `ms-tpm-20-ref`_ on github).  The reference implementation
+starts a network server and listens for TPM commands on port 2321 and
+TPM Platform control commands on port 2322, although these can be
+altered.  The QEMU mssim TPM backend talks to this implementation.  By
+default it connects to the default ports on localhost:
+
+.. code-block:: console
+
+  qemu-system-x86_64 <qemu-options> \
+    -tpmdev mssim,id=tpm0 \
+    -device tpm-crb,tpmdev=tpm0
+
+
+Although it can also communicate with a remote host, which must be
+specified as a SocketAddress via json on the command line for each of
+the command and control ports:
+
+.. code-block:: console
+
+  qemu-system-x86_64 <qemu-options> \
+    -tpmdev "{'type':'mssim','id':'tpm0','command':{'type':'inet','host':'remote','port':'2321'},'control':{'type':'inet','host':'remote','port':'2322'}}" \
+    -device tpm-crb,tpmdev=tpm0
+
+
+The mssim backend supports snapshotting and migration, but the state
+of the Microsoft Simulator server must be preserved (or the server
+kept running) outside of QEMU for restore to be successful.
+
 The QEMU TPM emulator device
 ----------------------------
 
@@ -526,3 +558,6 @@ the following:
 
 .. _SWTPM protocol:
    https://github.com/stefanberger/swtpm/blob/master/man/man3/swtpm_ioctls.pod
+
+.. _ms-tpm-20-ref:
+   https://github.com/microsoft/ms-tpm-20-ref
diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c
index ed78a87ddd..db58f16269 100644
--- a/monitor/hmp-cmds.c
+++ b/monitor/hmp-cmds.c
@@ -731,6 +731,7 @@ 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) {
@@ -764,6 +765,12 @@ void hmp_info_tpm(Monitor *mon, const QDict *qdict)
             teo = ti->options->u.emulator.data;
             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 2b491c28b4..f9dde35377 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'],
@@ -117,6 +118,22 @@
   'data': { 'data': 'TPMEmulatorOptions' },
   '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:
 #
@@ -124,6 +141,7 @@
 #
 # @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
 ##
@@ -131,7 +149,8 @@
   'base': { 'type': 'TpmType' },
   'discriminator': 'type',
   'data': { 'passthrough' : 'TPMPassthroughOptionsWrapper',
-            'emulator': 'TPMEmulatorOptionsWrapper' },
+            'emulator': 'TPMEmulatorOptionsWrapper',
+            'mssim' : 'TPMmssimOptions' },
   'if': 'CONFIG_TPM' }
 
 ##
@@ -150,7 +169,8 @@
             'id' : 'str' },
   'discriminator': 'type',
   'data': { 'passthrough' : 'TPMPassthroughOptions',
-            'emulator': 'TPMEmulatorOptions' },
+            'emulator': 'TPMEmulatorOptions',
+            'mssim': 'TPMmssimOptions' },
   'if': 'CONFIG_TPM' }
 
 ##
-- 
2.35.3

Re: [PATCH v5 1/2] tpm: convert tpmdev options processing to new visitor format

[Stefan Berger]

On 1/5/23 08:00, James Bottomley wrote:
> From: James Bottomley <James.Bottomley@HansenPartnership.com>
> 
> Instead of processing the tpmdev options using the old qemu options,
> convert to the new visitor format which also allows the passing of
> json on the command line.
> 
> Signed-off-by: James Bottomley <jejb@linux.ibm.com>
> 
> ---
> v4: add TpmConfiOptions
> ---
>   backends/tpm/tpm_emulator.c    | 24 ++++-----
>   backends/tpm/tpm_passthrough.c | 25 +++-------
>   include/sysemu/tpm.h           |  4 +-
>   include/sysemu/tpm_backend.h   |  2 +-
>   qapi/tpm.json                  | 19 +++++++
>   softmmu/tpm.c                  | 90 ++++++++++++++--------------------
>   softmmu/vl.c                   | 19 +------
>   7 files changed, 76 insertions(+), 107 deletions(-)
> 
> diff --git a/backends/tpm/tpm_emulator.c b/backends/tpm/tpm_emulator.c
> index 49cc3d749d..cb6bf9d7c2 100644
> --- a/backends/tpm/tpm_emulator.c
> +++ b/backends/tpm/tpm_emulator.c
> @@ -584,33 +584,28 @@ err_exit:
>       return -1;
>   }
>   
> -static int tpm_emulator_handle_device_opts(TPMEmulator *tpm_emu, QemuOpts *opts)
> +static int tpm_emulator_handle_device_opts(TPMEmulator *tpm_emu, TpmCreateOptions *opts)
>   {
> -    const char *value;
>       Error *err = NULL;
>       Chardev *dev;
>   
> -    value = qemu_opt_get(opts, "chardev");
> -    if (!value) {
> -        error_report("tpm-emulator: parameter 'chardev' is missing");
> -        goto err;
> -    }
> +    tpm_emu->options = QAPI_CLONE(TPMEmulatorOptions, &opts->u.emulator);
> +    tpm_emu->data_ioc = NULL;
>   
> -    dev = qemu_chr_find(value);
> +    dev = qemu_chr_find(opts->u.emulator.chardev);
>       if (!dev) {
> -        error_report("tpm-emulator: tpm chardev '%s' not found", value);
> +        error_report("tpm-emulator: tpm chardev '%s' not found",
> +                opts->u.emulator.chardev);
>           goto err;
>       }
>   
>       if (!qemu_chr_fe_init(&tpm_emu->ctrl_chr, dev, &err)) {
>           error_prepend(&err, "tpm-emulator: No valid chardev found at '%s':",
> -                      value);
> +                      opts->u.emulator.chardev);
>           error_report_err(err);
>           goto err;
>       }
>   
> -    tpm_emu->options->chardev = g_strdup(value);
> -
>       if (tpm_emulator_prepare_data_fd(tpm_emu) < 0) {
>           goto err;
>       }
> @@ -649,7 +644,7 @@ err:
>       return -1;
>   }
>   
> -static TPMBackend *tpm_emulator_create(QemuOpts *opts)
> +static TPMBackend *tpm_emulator_create(TpmCreateOptions *opts)
>   {
>       TPMBackend *tb = TPM_BACKEND(object_new(TYPE_TPM_EMULATOR));
>   
> @@ -972,7 +967,6 @@ static void tpm_emulator_inst_init(Object *obj)
>   
>       trace_tpm_emulator_inst_init();
>   
> -    tpm_emu->options = g_new0(TPMEmulatorOptions, 1);
>       tpm_emu->cur_locty_number = ~0;
>       qemu_mutex_init(&tpm_emu->mutex);
>       tpm_emu->vmstate =
> @@ -990,7 +984,7 @@ static void tpm_emulator_shutdown(TPMEmulator *tpm_emu)
>   {
>       ptm_res res;
>   
> -    if (!tpm_emu->options->chardev) {
> +    if (!tpm_emu->data_ioc) {
>           /* was never properly initialized */
>           return;
>       }
> diff --git a/backends/tpm/tpm_passthrough.c b/backends/tpm/tpm_passthrough.c
> index 179697a3a9..4a30143257 100644
> --- a/backends/tpm/tpm_passthrough.c
> +++ b/backends/tpm/tpm_passthrough.c
> @@ -252,21 +252,11 @@ static int tpm_passthrough_open_sysfs_cancel(TPMPassthruState *tpm_pt)
>   }
>   
>   static int
> -tpm_passthrough_handle_device_opts(TPMPassthruState *tpm_pt, QemuOpts *opts)
> +tpm_passthrough_handle_device_opts(TPMPassthruState *tpm_pt, TpmCreateOptions *opts)
>   {
> -    const char *value;
> +    tpm_pt->options = QAPI_CLONE(TPMPassthroughOptions, &opts->u.passthrough);
>   
> -    value = qemu_opt_get(opts, "cancel-path");
> -    if (value) {
> -        tpm_pt->options->cancel_path = g_strdup(value);
> -    }
> -
> -    value = qemu_opt_get(opts, "path");
> -    if (value) {
> -        tpm_pt->options->path = g_strdup(value);
> -    }
> -
> -    tpm_pt->tpm_dev = value ? value : TPM_PASSTHROUGH_DEFAULT_DEVICE;
> +    tpm_pt->tpm_dev = opts->u.passthrough.path ? opts->u.passthrough.path : TPM_PASSTHROUGH_DEFAULT_DEVICE;

WARNING: line over 80 characters
#31: FILE: backends/tpm/tpm_emulator.c:587:
+static int tpm_emulator_handle_device_opts(TPMEmulator *tpm_emu, TpmCreateOptions *opts)

WARNING: line over 80 characters
#102: FILE: backends/tpm/tpm_passthrough.c:255:
+tpm_passthrough_handle_device_opts(TPMPassthruState *tpm_pt, TpmCreateOptions *opts)

ERROR: line over 90 characters
#118: FILE: backends/tpm/tpm_passthrough.c:259:
+    tpm_pt->tpm_dev = opts->u.passthrough.path ? opts->u.passthrough.path : TPM_PASSTHROUGH_DEFAULT_DEVICE;

ERROR: line over 90 characters
#143: FILE: backends/tpm/tpm_passthrough.c:313:
+    options->u.passthrough.data = QAPI_CLONE(TPMPassthroughOptions, TPM_PASSTHROUGH(tb)->options);

total: 2 errors, 2 warnings, 349 lines checked

mssim.v5/0001-tpm-convert-tpmdev-options-processing-to-new-visitor.patch has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.



> diff --git a/softmmu/vl.c b/softmmu/vl.c
> index 798e1dc933..8c2655dbc2 100644
> --- a/softmmu/vl.c
> +++ b/softmmu/vl.c
> @@ -328,16 +328,6 @@ static QemuOptsList qemu_object_opts = {
>       },
>   };
>   
> -static QemuOptsList qemu_tpmdev_opts = {
> -    .name = "tpmdev",
> -    .implied_opt_name = "type",
> -    .head = QTAILQ_HEAD_INITIALIZER(qemu_tpmdev_opts.head),
> -    .desc = {
> -        /* options are defined in the TPM backends */
> -        { /* end of list */ }
> -    },
> -};
> -
>   static QemuOptsList qemu_overcommit_opts = {
>       .name = "overcommit",
>       .head = QTAILQ_HEAD_INITIALIZER(qemu_overcommit_opts.head),
> @@ -1934,9 +1924,7 @@ static void qemu_create_late_backends(void)
>   
>       object_option_foreach_add(object_create_late);
>   
> -    if (tpm_init() < 0) {
> -        exit(1);
> -    }
> +    tpm_init();
>   
>       qemu_opts_foreach(qemu_find_opts("mon"),
>                         mon_init_func, NULL, &error_fatal);
> @@ -2658,7 +2646,6 @@ void qemu_init(int argc, char **argv)
>       qemu_add_opts(&qemu_boot_opts);
>       qemu_add_opts(&qemu_add_fd_opts);
>       qemu_add_opts(&qemu_object_opts);
> -    qemu_add_opts(&qemu_tpmdev_opts);
>       qemu_add_opts(&qemu_overcommit_opts);
>       qemu_add_opts(&qemu_msg_opts);
>       qemu_add_opts(&qemu_name_opts);
> @@ -2906,9 +2893,7 @@ void qemu_init(int argc, char **argv)
>                   break;
>   #ifdef CONFIG_TPM
>               case QEMU_OPTION_tpmdev:
> -                if (tpm_config_parse(qemu_find_opts("tpmdev"), optarg) < 0) {
> -                    exit(1);
> -                }
> +                tpm_config_parse(optarg);

The comment to v4 still applies:

$ qemu-system-x86_64 --tpmdev help
Supported TPM types (choose only one):
  passthrough   Passthrough TPM backend driver
     emulator   TPM emulator backend driver
        mssim   TPM mssim emulator backend driver
VNC server running on ::1:5900


>                   break;
>   #endif
>               case QEMU_OPTION_mempath:

Re: [PATCH v5 2/2] tpm: add backend for mssim

[Stefan Berger]

On 1/5/23 08:00, James Bottomley wrote:
> From: James Bottomley <James.Bottomley@HansenPartnership.com>
> 
> 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
> 
>
> diff --git a/docs/specs/tpm.rst b/docs/specs/tpm.rst
> index 535912a92b..1398735956 100644
> --- a/docs/specs/tpm.rst
> +++ b/docs/specs/tpm.rst
> @@ -270,6 +270,38 @@ available as a module (assuming a TPM 2 is passed through):
>     /sys/devices/LNXSYSTEM:00/LNXSYBUS:00/MSFT0101:00/tpm/tpm0/pcr-sha256/9
>     ...
>   
> +The QEMU TPM Microsoft Simulator Device
> +---------------------------------------
> +
> +The TCG provides a reference implementation for TPM 2.0 written by
> +Microsoft (See `ms-tpm-20-ref`_ on github).  The reference implementation
> +starts a network server and listens for TPM commands on port 2321 and
> +TPM Platform control commands on port 2322, although these can be
> +altered.  The QEMU mssim TPM backend talks to this implementation.  By
> +default it connects to the default ports on localhost:
> +
> +.. code-block:: console
> +
> +  qemu-system-x86_64 <qemu-options> \
> +    -tpmdev mssim,id=tpm0 \
> +    -device tpm-crb,tpmdev=tpm0
> +
> +
> +Although it can also communicate with a remote host, which must be
> +specified as a SocketAddress via json on the command line for each of
> +the command and control ports:
> +
> +.. code-block:: console
> +
> +  qemu-system-x86_64 <qemu-options> \
> +    -tpmdev "{'type':'mssim','id':'tpm0','command':{'type':'inet','host':'remote','port':'2321'},'control':{'type':'inet','host':'remote','port':'2322'}}" \
> +    -device tpm-crb,tpmdev=tpm0
> +
> +
> +The mssim backend supports snapshotting and migration, but the state
> +of the Microsoft Simulator server must be preserved (or the server
> +kept running) outside of QEMU for restore to be successful.

My comments to v3 still apply here.

I also just tried migration and on the -incoming side it did not work anymore. Did you test this?

    Stefan

Re: [PATCH v5 1/2] tpm: convert tpmdev options processing to new visitor format

[James Bottomley]

On Thu, 2023-01-05 at 09:59 -0500, Stefan Berger wrote:
[...]
> > @@ -2658,7 +2646,6 @@ void qemu_init(int argc, char **argv)
> >       qemu_add_opts(&qemu_boot_opts);
> >       qemu_add_opts(&qemu_add_fd_opts);
> >       qemu_add_opts(&qemu_object_opts);
> > -    qemu_add_opts(&qemu_tpmdev_opts);
> >       qemu_add_opts(&qemu_overcommit_opts);
> >       qemu_add_opts(&qemu_msg_opts);
> >       qemu_add_opts(&qemu_name_opts);
> > @@ -2906,9 +2893,7 @@ void qemu_init(int argc, char **argv)
> >                   break;
> >   #ifdef CONFIG_TPM
> >               case QEMU_OPTION_tpmdev:
> > -                if (tpm_config_parse(qemu_find_opts("tpmdev"),
> > optarg) < 0) {
> > -                    exit(1);
> > -                }
> > +                tpm_config_parse(optarg);
> 
> The comment to v4 still applies:
> 
> $ qemu-system-x86_64 --tpmdev help
> Supported TPM types (choose only one):
>   passthrough   Passthrough TPM backend driver
>      emulator   TPM emulator backend driver
>         mssim   TPM mssim emulator backend driver
> VNC server running on ::1:5900

So I think if I parse this correctly, your complaint is the help option
no longer exit(1)'s?  It shouldn't do that because it's not a failure,
but I can code it to exit(0).

James

Re: [PATCH v5 2/2] tpm: add backend for mssim

[James Bottomley]

On Thu, 2023-01-05 at 11:20 -0500, Stefan Berger wrote:
> 
> 
> On 1/5/23 08:00, James Bottomley wrote:
[...]
> > +The mssim backend supports snapshotting and migration, but the
> > state
> > +of the Microsoft Simulator server must be preserved (or the server
> > +kept running) outside of QEMU for restore to be successful.
> 
> My comments to v3 still apply here.

You didn't make any v3 comments on migration.

> I also just tried migration and on the -incoming side it did not work
> anymore. Did you test this?

Well, yes, as I said.  However, I seem to have left one change in my
local tree which I forgot to sync to the patch:

diff --git a/backends/tpm/tpm_mssim.c b/backends/tpm/tpm_mssim.c
index 75dce165b8..125c8d0b15 100644
--- a/backends/tpm/tpm_mssim.c
+++ b/backends/tpm/tpm_mssim.c
@@ -66,7 +66,7 @@ static void tpm_mssim_instance_finalize(Object *obj)
 {
     TPMmssim *t = TPM_MSSIM(obj);
 
-    if (t->ctrl_qc && !runstate_check(RUN_STATE_INMIGRATE))
+    if (t->cmd_qc && !runstate_check(RUN_STATE_POSTMIGRATE))
         tpm_send_ctrl(t, TPM_SIGNAL_POWER_OFF, NULL);
 
     object_unref(OBJECT(t->ctrl_qc));

James

Re: [PATCH v5 2/2] tpm: add backend for mssim

[Stefan Berger]

On 1/5/23 17:02, James Bottomley wrote:
> On Thu, 2023-01-05 at 11:20 -0500, Stefan Berger wrote:
>>
>>
>> On 1/5/23 08:00, James Bottomley wrote:
> [...]
>>> +The mssim backend supports snapshotting and migration, but the
>>> state
>>> +of the Microsoft Simulator server must be preserved (or the server
>>> +kept running) outside of QEMU for restore to be successful.
>>
>> My comments to v3 still apply here.
> 
> You didn't make any v3 comments on migration.

https://lists.gnu.org/archive/html/qemu-devel/2022-12/msg03146.html

A user should be able to recreate, with today's code, what is claimed in the documentation regarding snapshotting for example.


   Stefan

> 
>> I also just tried migration and on the -incoming side it did not work
>> anymore. Did you test this?
> 
> Well, yes, as I said.  However, I seem to have left one change in my
> local tree which I forgot to sync to the patch:
> 
> diff --git a/backends/tpm/tpm_mssim.c b/backends/tpm/tpm_mssim.c
> index 75dce165b8..125c8d0b15 100644
> --- a/backends/tpm/tpm_mssim.c
> +++ b/backends/tpm/tpm_mssim.c
> @@ -66,7 +66,7 @@ static void tpm_mssim_instance_finalize(Object *obj)
>   {
>       TPMmssim *t = TPM_MSSIM(obj);
>   
> -    if (t->ctrl_qc && !runstate_check(RUN_STATE_INMIGRATE))
> +    if (t->cmd_qc && !runstate_check(RUN_STATE_POSTMIGRATE))
>           tpm_send_ctrl(t, TPM_SIGNAL_POWER_OFF, NULL);
>   
>       object_unref(OBJECT(t->ctrl_qc));
> 
> James
> 

Re: [PATCH v5 1/2] tpm: convert tpmdev options processing to new visitor format

[Daniel P. Berrangé]

On Thu, Jan 05, 2023 at 03:34:50PM -0500, James Bottomley wrote:
> On Thu, 2023-01-05 at 09:59 -0500, Stefan Berger wrote:
> [...]
> > > @@ -2658,7 +2646,6 @@ void qemu_init(int argc, char **argv)
> > >       qemu_add_opts(&qemu_boot_opts);
> > >       qemu_add_opts(&qemu_add_fd_opts);
> > >       qemu_add_opts(&qemu_object_opts);
> > > -    qemu_add_opts(&qemu_tpmdev_opts);
> > >       qemu_add_opts(&qemu_overcommit_opts);
> > >       qemu_add_opts(&qemu_msg_opts);
> > >       qemu_add_opts(&qemu_name_opts);
> > > @@ -2906,9 +2893,7 @@ void qemu_init(int argc, char **argv)
> > >                   break;
> > >   #ifdef CONFIG_TPM
> > >               case QEMU_OPTION_tpmdev:
> > > -                if (tpm_config_parse(qemu_find_opts("tpmdev"),
> > > optarg) < 0) {
> > > -                    exit(1);
> > > -                }
> > > +                tpm_config_parse(optarg);
> > 
> > The comment to v4 still applies:
> > 
> > $ qemu-system-x86_64 --tpmdev help
> > Supported TPM types (choose only one):
> >   passthrough   Passthrough TPM backend driver
> >      emulator   TPM emulator backend driver
> >         mssim   TPM mssim emulator backend driver
> > VNC server running on ::1:5900
> 
> So I think if I parse this correctly, your complaint is the help option
> no longer exit(1)'s?  It shouldn't do that because it's not a failure,
> but I can code it to exit(0).


Yes, 'help' options should 'exit(0)'


With regards,
Daniel
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