* [Qemu-devel] [PATCH v4 0/8] Provide support for the software TPM emulator
@ 2017-05-16 7:58 Amarnath Valluri
2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 1/8] tpm-backend: Remove unneeded member variable from backend class Amarnath Valluri
` (8 more replies)
0 siblings, 9 replies; 24+ messages in thread
From: Amarnath Valluri @ 2017-05-16 7:58 UTC (permalink / raw)
To: qemu-devel; +Cc: Amarnath Valluri
Briefly, Theses set of patches introduces:
- new TPM backend driver to support software TPM emulators(swtpm(1)).
- and few supported fixes/enhancements/cleanup to existing tpm backend code.
The similar idea was initiated earliar(2) by Stefan Berger(CCed) with slightly
different approach, using CUSE. As swtpm has excellent support for unix domain
sockets, hence this implementation uses unix domain sockets to communicate
with
swtpm.
When Qemu is configured with 'emulator' tpm backend, it spawns 'swtpm' and
communicates its via Unix domain sockets.
1) https://github.com/stefanberger/swtpm
2) https://lists.nongnu.org/archive/html/qemu-devel/2016-01/msg00089.html
** Changes in V2:
- Made spawnning swtpm optional
- used QIOChannel instead of plain unix sockets
- incorporated other fixes pointed in v1 review
** Changes in v3:
- Addressed review comments made by Stefan Berger and Deniel P Berrange
** Changes in v4:
- Moved realloc_buffer() to TIS model
- Made TpmInfo related change backwards compatible.
Amarnath Valluri (8):
tpm-backend: Remove unneeded member variable from backend class
tpm-backend: Move thread handling inside TPMBackend
tpm-backend: Initialize and free data members in it's own methods
tpm-backend: Made few interface methods optional
tmp backend: Add new api to read backend TpmInfo
tpm-backend: Move realloc_buffer() implementation to tpm-tis model
tpm-passthrough: move reusable code to utils
tpm: Added support for TPM emulator
backends/tpm.c | 117 +++--
configure | 15 +-
hmp.c | 27 +-
hw/tpm/Makefile.objs | 1 +
hw/tpm/tpm_emulator.c | 950 +++++++++++++++++++++++++++++++++++++++
hw/tpm/tpm_ioctl.h | 243 ++++++++++
hw/tpm/tpm_passthrough.c | 238 +++-------
hw/tpm/tpm_tis.c | 14 +-
hw/tpm/tpm_util.c | 25 ++
hw/tpm/tpm_util.h | 4 +
include/sysemu/tpm_backend.h | 96 ++--
include/sysemu/tpm_backend_int.h | 41 --
qapi-schema.json | 41 +-
qemu-options.hx | 53 ++-
tpm.c | 38 +-
15 files changed, 1545 insertions(+), 358 deletions(-)
create mode 100644 hw/tpm/tpm_emulator.c
create mode 100644 hw/tpm/tpm_ioctl.h
delete mode 100644 include/sysemu/tpm_backend_int.h
--
2.7.4
^ permalink raw reply [flat|nested] 24+ messages in thread* [Qemu-devel] [PATCH v4 1/8] tpm-backend: Remove unneeded member variable from backend class 2017-05-16 7:58 [Qemu-devel] [PATCH v4 0/8] Provide support for the software TPM emulator Amarnath Valluri @ 2017-05-16 7:58 ` Amarnath Valluri 2017-05-24 14:15 ` Stefan Berger 2017-05-24 14:34 ` Marc-André Lureau 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 2/8] tpm-backend: Move thread handling inside TPMBackend Amarnath Valluri ` (7 subsequent siblings) 8 siblings, 2 replies; 24+ messages in thread From: Amarnath Valluri @ 2017-05-16 7:58 UTC (permalink / raw) To: qemu-devel; +Cc: Amarnath Valluri TPMDriverOps inside TPMBackend is not required, as it is supposed to be a class member. The only possible reason for keeping in TPMBackend was, to get the backend type in tpm.c where dedicated backend api, tpm_backend_get_type() is present. Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> --- hw/tpm/tpm_passthrough.c | 4 ---- include/sysemu/tpm_backend.h | 1 - tpm.c | 2 +- 3 files changed, 1 insertion(+), 6 deletions(-) diff --git a/hw/tpm/tpm_passthrough.c b/hw/tpm/tpm_passthrough.c index 9234eb3..a0baf5f 100644 --- a/hw/tpm/tpm_passthrough.c +++ b/hw/tpm/tpm_passthrough.c @@ -46,8 +46,6 @@ #define TPM_PASSTHROUGH(obj) \ OBJECT_CHECK(TPMPassthruState, (obj), TYPE_TPM_PASSTHROUGH) -static const TPMDriverOps tpm_passthrough_driver; - /* data structures */ typedef struct TPMPassthruThreadParams { TPMState *tpm_state; @@ -462,8 +460,6 @@ static TPMBackend *tpm_passthrough_create(QemuOpts *opts, const char *id) /* let frontend set the fe_model to proper value */ tb->fe_model = -1; - tb->ops = &tpm_passthrough_driver; - if (tpm_passthrough_handle_device_opts(opts, tb)) { goto err_exit; } diff --git a/include/sysemu/tpm_backend.h b/include/sysemu/tpm_backend.h index b58f52d..e7f590d 100644 --- a/include/sysemu/tpm_backend.h +++ b/include/sysemu/tpm_backend.h @@ -50,7 +50,6 @@ struct TPMBackend { enum TpmModel fe_model; char *path; char *cancel_path; - const TPMDriverOps *ops; QLIST_ENTRY(TPMBackend) list; }; diff --git a/tpm.c b/tpm.c index 9a7c711..0ee021a 100644 --- a/tpm.c +++ b/tpm.c @@ -258,7 +258,7 @@ static TPMInfo *qmp_query_tpm_inst(TPMBackend *drv) res->model = drv->fe_model; res->options = g_new0(TpmTypeOptions, 1); - switch (drv->ops->type) { + switch (tpm_backend_get_type(drv)) { case TPM_TYPE_PASSTHROUGH: res->options->type = TPM_TYPE_OPTIONS_KIND_PASSTHROUGH; tpo = g_new0(TPMPassthroughOptions, 1); -- 2.7.4 ^ permalink raw reply related [flat|nested] 24+ messages in thread
* Re: [Qemu-devel] [PATCH v4 1/8] tpm-backend: Remove unneeded member variable from backend class 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 1/8] tpm-backend: Remove unneeded member variable from backend class Amarnath Valluri @ 2017-05-24 14:15 ` Stefan Berger 2017-05-24 14:34 ` Marc-André Lureau 1 sibling, 0 replies; 24+ messages in thread From: Stefan Berger @ 2017-05-24 14:15 UTC (permalink / raw) To: Amarnath Valluri, qemu-devel On 05/16/2017 03:58 AM, Amarnath Valluri wrote: > TPMDriverOps inside TPMBackend is not required, as it is supposed to be a class > member. The only possible reason for keeping in TPMBackend was, to get the > backend type in tpm.c where dedicated backend api, tpm_backend_get_type() is > present. > > Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com> > --- > hw/tpm/tpm_passthrough.c | 4 ---- > include/sysemu/tpm_backend.h | 1 - > tpm.c | 2 +- > 3 files changed, 1 insertion(+), 6 deletions(-) > > diff --git a/hw/tpm/tpm_passthrough.c b/hw/tpm/tpm_passthrough.c > index 9234eb3..a0baf5f 100644 > --- a/hw/tpm/tpm_passthrough.c > +++ b/hw/tpm/tpm_passthrough.c > @@ -46,8 +46,6 @@ > #define TPM_PASSTHROUGH(obj) \ > OBJECT_CHECK(TPMPassthruState, (obj), TYPE_TPM_PASSTHROUGH) > > -static const TPMDriverOps tpm_passthrough_driver; > - > /* data structures */ > typedef struct TPMPassthruThreadParams { > TPMState *tpm_state; > @@ -462,8 +460,6 @@ static TPMBackend *tpm_passthrough_create(QemuOpts *opts, const char *id) > /* let frontend set the fe_model to proper value */ > tb->fe_model = -1; > > - tb->ops = &tpm_passthrough_driver; > - > if (tpm_passthrough_handle_device_opts(opts, tb)) { > goto err_exit; > } > diff --git a/include/sysemu/tpm_backend.h b/include/sysemu/tpm_backend.h > index b58f52d..e7f590d 100644 > --- a/include/sysemu/tpm_backend.h > +++ b/include/sysemu/tpm_backend.h > @@ -50,7 +50,6 @@ struct TPMBackend { > enum TpmModel fe_model; > char *path; > char *cancel_path; > - const TPMDriverOps *ops; > > QLIST_ENTRY(TPMBackend) list; > }; > diff --git a/tpm.c b/tpm.c > index 9a7c711..0ee021a 100644 > --- a/tpm.c > +++ b/tpm.c > @@ -258,7 +258,7 @@ static TPMInfo *qmp_query_tpm_inst(TPMBackend *drv) > res->model = drv->fe_model; > res->options = g_new0(TpmTypeOptions, 1); > > - switch (drv->ops->type) { > + switch (tpm_backend_get_type(drv)) { > case TPM_TYPE_PASSTHROUGH: > res->options->type = TPM_TYPE_OPTIONS_KIND_PASSTHROUGH; > tpo = g_new0(TPMPassthroughOptions, 1); ^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [Qemu-devel] [PATCH v4 1/8] tpm-backend: Remove unneeded member variable from backend class 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 1/8] tpm-backend: Remove unneeded member variable from backend class Amarnath Valluri 2017-05-24 14:15 ` Stefan Berger @ 2017-05-24 14:34 ` Marc-André Lureau 2017-06-05 7:22 ` Valluri, Amarnath 1 sibling, 1 reply; 24+ messages in thread From: Marc-André Lureau @ 2017-05-24 14:34 UTC (permalink / raw) To: Amarnath Valluri, qemu-devel Hi On Tue, May 16, 2017 at 12:00 PM Amarnath Valluri < amarnath.valluri@intel.com> wrote: > TPMDriverOps inside TPMBackend is not required, as it is supposed to be a > class > member. The only possible reason for keeping in TPMBackend was, to get the > backend type in tpm.c where dedicated backend api, tpm_backend_get_type() > is > present. > > Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> > Please add & keep my r-b tags from previous iterations in commit message if they are no or only minor changes. > --- > hw/tpm/tpm_passthrough.c | 4 ---- > include/sysemu/tpm_backend.h | 1 - > tpm.c | 2 +- > 3 files changed, 1 insertion(+), 6 deletions(-) > > diff --git a/hw/tpm/tpm_passthrough.c b/hw/tpm/tpm_passthrough.c > index 9234eb3..a0baf5f 100644 > --- a/hw/tpm/tpm_passthrough.c > +++ b/hw/tpm/tpm_passthrough.c > @@ -46,8 +46,6 @@ > #define TPM_PASSTHROUGH(obj) \ > OBJECT_CHECK(TPMPassthruState, (obj), TYPE_TPM_PASSTHROUGH) > > -static const TPMDriverOps tpm_passthrough_driver; > - > /* data structures */ > typedef struct TPMPassthruThreadParams { > TPMState *tpm_state; > @@ -462,8 +460,6 @@ static TPMBackend *tpm_passthrough_create(QemuOpts > *opts, const char *id) > /* let frontend set the fe_model to proper value */ > tb->fe_model = -1; > > - tb->ops = &tpm_passthrough_driver; > - > if (tpm_passthrough_handle_device_opts(opts, tb)) { > goto err_exit; > } > diff --git a/include/sysemu/tpm_backend.h b/include/sysemu/tpm_backend.h > index b58f52d..e7f590d 100644 > --- a/include/sysemu/tpm_backend.h > +++ b/include/sysemu/tpm_backend.h > @@ -50,7 +50,6 @@ struct TPMBackend { > enum TpmModel fe_model; > char *path; > char *cancel_path; > - const TPMDriverOps *ops; > > QLIST_ENTRY(TPMBackend) list; > }; > diff --git a/tpm.c b/tpm.c > index 9a7c711..0ee021a 100644 > --- a/tpm.c > +++ b/tpm.c > @@ -258,7 +258,7 @@ static TPMInfo *qmp_query_tpm_inst(TPMBackend *drv) > res->model = drv->fe_model; > res->options = g_new0(TpmTypeOptions, 1); > > - switch (drv->ops->type) { > + switch (tpm_backend_get_type(drv)) { > case TPM_TYPE_PASSTHROUGH: > res->options->type = TPM_TYPE_OPTIONS_KIND_PASSTHROUGH; > tpo = g_new0(TPMPassthroughOptions, 1); > -- > 2.7.4 > > > -- Marc-André Lureau ^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [Qemu-devel] [PATCH v4 1/8] tpm-backend: Remove unneeded member variable from backend class 2017-05-24 14:34 ` Marc-André Lureau @ 2017-06-05 7:22 ` Valluri, Amarnath 2017-06-05 9:57 ` Marc-André Lureau 0 siblings, 1 reply; 24+ messages in thread From: Valluri, Amarnath @ 2017-06-05 7:22 UTC (permalink / raw) To: marcandre.lureau, qemu-devel On Wed, 2017-05-24 at 14:34 +0000, Marc-André Lureau wrote: Hi On Tue, May 16, 2017 at 12:00 PM Amarnath Valluri <amarnath.valluri@intel.com<mailto:amarnath.valluri@intel.com>> wrote: TPMDriverOps inside TPMBackend is not required, as it is supposed to be a class member. The only possible reason for keeping in TPMBackend was, to get the backend type in tpm.c where dedicated backend api, tpm_backend_get_type() is present. Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com<mailto:amarnath.valluri@intel.com>> Please add & keep my r-b tags from previous iterations in commit message if they are no or only minor changes. Marc, do you mean to resend the patch set by keeping 'Reviewed-by:' tag for commits. - Amarnath --- hw/tpm/tpm_passthrough.c | 4 ---- include/sysemu/tpm_backend.h | 1 - tpm.c | 2 +- 3 files changed, 1 insertion(+), 6 deletions(-) diff --git a/hw/tpm/tpm_passthrough.c b/hw/tpm/tpm_passthrough.c index 9234eb3..a0baf5f 100644 --- a/hw/tpm/tpm_passthrough.c +++ b/hw/tpm/tpm_passthrough.c @@ -46,8 +46,6 @@ #define TPM_PASSTHROUGH(obj) \ OBJECT_CHECK(TPMPassthruState, (obj), TYPE_TPM_PASSTHROUGH) -static const TPMDriverOps tpm_passthrough_driver; - /* data structures */ typedef struct TPMPassthruThreadParams { TPMState *tpm_state; @@ -462,8 +460,6 @@ static TPMBackend *tpm_passthrough_create(QemuOpts *opts, const char *id) /* let frontend set the fe_model to proper value */ tb->fe_model = -1; - tb->ops = &tpm_passthrough_driver; - if (tpm_passthrough_handle_device_opts(opts, tb)) { goto err_exit; } diff --git a/include/sysemu/tpm_backend.h b/include/sysemu/tpm_backend.h index b58f52d..e7f590d 100644 --- a/include/sysemu/tpm_backend.h +++ b/include/sysemu/tpm_backend.h @@ -50,7 +50,6 @@ struct TPMBackend { enum TpmModel fe_model; char *path; char *cancel_path; - const TPMDriverOps *ops; QLIST_ENTRY(TPMBackend) list; }; diff --git a/tpm.c b/tpm.c index 9a7c711..0ee021a 100644 --- a/tpm.c +++ b/tpm.c @@ -258,7 +258,7 @@ static TPMInfo *qmp_query_tpm_inst(TPMBackend *drv) res->model = drv->fe_model; res->options = g_new0(TpmTypeOptions, 1); - switch (drv->ops->type) { + switch (tpm_backend_get_type(drv)) { case TPM_TYPE_PASSTHROUGH: res->options->type = TPM_TYPE_OPTIONS_KIND_PASSTHROUGH; tpo = g_new0(TPMPassthroughOptions, 1); -- 2.7.4 -- Marc-André Lureau ^ permalink raw reply related [flat|nested] 24+ messages in thread
* Re: [Qemu-devel] [PATCH v4 1/8] tpm-backend: Remove unneeded member variable from backend class 2017-06-05 7:22 ` Valluri, Amarnath @ 2017-06-05 9:57 ` Marc-André Lureau 0 siblings, 0 replies; 24+ messages in thread From: Marc-André Lureau @ 2017-06-05 9:57 UTC (permalink / raw) To: Valluri, Amarnath, qemu-devel Hi On Mon, Jun 5, 2017 at 11:22 AM Valluri, Amarnath < amarnath.valluri@intel.com> wrote: > On Wed, 2017-05-24 at 14:34 +0000, Marc-André Lureau wrote: > > Hi > > On Tue, May 16, 2017 at 12:00 PM Amarnath Valluri < > amarnath.valluri@intel.com> wrote: > > TPMDriverOps inside TPMBackend is not required, as it is supposed to be a > class > member. The only possible reason for keeping in TPMBackend was, to get the > backend type in tpm.c where dedicated backend api, tpm_backend_get_type() > is > present. > > Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> > > > Please add & keep my r-b tags from previous iterations in commit message > if they are no or only minor changes. > > Marc, do you mean to resend the patch set by keeping 'Reviewed-by:' tag > for commits. > On the patches I gave a "Reviewed-by", you should add it to the commit message. Next resend of the series should have them. -- Marc-André Lureau ^ permalink raw reply [flat|nested] 24+ messages in thread
* [Qemu-devel] [PATCH v4 2/8] tpm-backend: Move thread handling inside TPMBackend 2017-05-16 7:58 [Qemu-devel] [PATCH v4 0/8] Provide support for the software TPM emulator Amarnath Valluri 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 1/8] tpm-backend: Remove unneeded member variable from backend class Amarnath Valluri @ 2017-05-16 7:58 ` Amarnath Valluri 2017-05-24 14:19 ` Stefan Berger 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 3/8] tpm-backend: Initialize and free data members in it's own methods Amarnath Valluri ` (6 subsequent siblings) 8 siblings, 1 reply; 24+ messages in thread From: Amarnath Valluri @ 2017-05-16 7:58 UTC (permalink / raw) To: qemu-devel; +Cc: Amarnath Valluri Move thread handling inside TPMBackend, this way backend implementations need not to maintain their own thread life cycle, instead they needs to implement 'handle_request()' class method that always been called from a thread. This change made tpm_backend_int.h kind of useless, hence removed it. Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> --- backends/tpm.c | 62 +++++++++++++++++++++++++--------------- hw/tpm/tpm_passthrough.c | 58 ++++++------------------------------- include/sysemu/tpm_backend.h | 32 +++++++++++++-------- include/sysemu/tpm_backend_int.h | 41 -------------------------- 4 files changed, 67 insertions(+), 126 deletions(-) delete mode 100644 include/sysemu/tpm_backend_int.h diff --git a/backends/tpm.c b/backends/tpm.c index 536f262..ce56c3b 100644 --- a/backends/tpm.c +++ b/backends/tpm.c @@ -18,7 +18,24 @@ #include "qapi/qmp/qerror.h" #include "sysemu/tpm.h" #include "qemu/thread.h" -#include "sysemu/tpm_backend_int.h" + +static void tpm_backend_worker_thread(gpointer data, gpointer user_data) +{ + TPMBackend *s = TPM_BACKEND(user_data); + TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); + + assert(k->handle_request != NULL); + k->handle_request(s, (TPMBackendCmd)data); +} + +static void tpm_backend_thread_end(TPMBackend *s) +{ + if (s->thread_pool) { + g_thread_pool_push(s->thread_pool, (gpointer)TPM_BACKEND_CMD_END, NULL); + g_thread_pool_free(s->thread_pool, FALSE, TRUE); + s->thread_pool = NULL; + } +} enum TpmType tpm_backend_get_type(TPMBackend *s) { @@ -39,6 +56,8 @@ void tpm_backend_destroy(TPMBackend *s) TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); k->ops->destroy(s); + + tpm_backend_thread_end(s); } int tpm_backend_init(TPMBackend *s, TPMState *state, @@ -46,13 +65,23 @@ int tpm_backend_init(TPMBackend *s, TPMState *state, { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); - return k->ops->init(s, state, datacb); + s->tpm_state = state; + s->recv_data_callback = datacb; + + return k->ops->init(s); } int tpm_backend_startup_tpm(TPMBackend *s) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); + /* terminate a running TPM */ + tpm_backend_thread_end(s); + + s->thread_pool = g_thread_pool_new(tpm_backend_worker_thread, s, 1, TRUE, + NULL); + g_thread_pool_push(s->thread_pool, (gpointer)TPM_BACKEND_CMD_INIT, NULL); + return k->ops->startup_tpm(s); } @@ -72,9 +101,8 @@ size_t tpm_backend_realloc_buffer(TPMBackend *s, TPMSizedBuffer *sb) void tpm_backend_deliver_request(TPMBackend *s) { - TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); - - k->ops->deliver_request(s); + g_thread_pool_push(s->thread_pool, (gpointer)TPM_BACKEND_CMD_PROCESS_CMD, + NULL); } void tpm_backend_reset(TPMBackend *s) @@ -82,6 +110,8 @@ void tpm_backend_reset(TPMBackend *s) TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); k->ops->reset(s); + + tpm_backend_thread_end(s); } void tpm_backend_cancel_cmd(TPMBackend *s) @@ -156,29 +186,14 @@ static void tpm_backend_instance_init(Object *obj) tpm_backend_prop_get_opened, tpm_backend_prop_set_opened, NULL); -} -void tpm_backend_thread_deliver_request(TPMBackendThread *tbt) -{ - g_thread_pool_push(tbt->pool, (gpointer)TPM_BACKEND_CMD_PROCESS_CMD, NULL); } -void tpm_backend_thread_create(TPMBackendThread *tbt, - GFunc func, gpointer user_data) +static void tpm_backend_instance_finalize(Object *obj) { - if (!tbt->pool) { - tbt->pool = g_thread_pool_new(func, user_data, 1, TRUE, NULL); - g_thread_pool_push(tbt->pool, (gpointer)TPM_BACKEND_CMD_INIT, NULL); - } -} + TPMBackend *s = TPM_BACKEND(obj); -void tpm_backend_thread_end(TPMBackendThread *tbt) -{ - if (tbt->pool) { - g_thread_pool_push(tbt->pool, (gpointer)TPM_BACKEND_CMD_END, NULL); - g_thread_pool_free(tbt->pool, FALSE, TRUE); - tbt->pool = NULL; - } + tpm_backend_thread_end(s); } static const TypeInfo tpm_backend_info = { @@ -186,6 +201,7 @@ static const TypeInfo tpm_backend_info = { .parent = TYPE_OBJECT, .instance_size = sizeof(TPMBackend), .instance_init = tpm_backend_instance_init, + .instance_finalize = tpm_backend_instance_finalize, .class_size = sizeof(TPMBackendClass), .abstract = true, }; diff --git a/hw/tpm/tpm_passthrough.c b/hw/tpm/tpm_passthrough.c index a0baf5f..f50d9cf 100644 --- a/hw/tpm/tpm_passthrough.c +++ b/hw/tpm/tpm_passthrough.c @@ -30,7 +30,6 @@ #include "tpm_int.h" #include "hw/hw.h" #include "hw/i386/pc.h" -#include "sysemu/tpm_backend_int.h" #include "tpm_tis.h" #include "tpm_util.h" @@ -47,20 +46,9 @@ OBJECT_CHECK(TPMPassthruState, (obj), TYPE_TPM_PASSTHROUGH) /* data structures */ -typedef struct TPMPassthruThreadParams { - TPMState *tpm_state; - - TPMRecvDataCB *recv_data_callback; - TPMBackend *tb; -} TPMPassthruThreadParams; - struct TPMPassthruState { TPMBackend parent; - TPMBackendThread tbt; - - TPMPassthruThreadParams tpm_thread_params; - char *tpm_dev; int tpm_fd; bool tpm_executing; @@ -214,12 +202,9 @@ static int tpm_passthrough_unix_transfer(TPMPassthruState *tpm_pt, selftest_done); } -static void tpm_passthrough_worker_thread(gpointer data, - gpointer user_data) +static void tpm_passthrough_handle_request(TPMBackend *tb, TPMBackendCmd cmd) { - TPMPassthruThreadParams *thr_parms = user_data; - TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(thr_parms->tb); - TPMBackendCmd cmd = (TPMBackendCmd)data; + TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); bool selftest_done = false; DPRINTF("tpm_passthrough: processing command type %d\n", cmd); @@ -227,12 +212,12 @@ static void tpm_passthrough_worker_thread(gpointer data, switch (cmd) { case TPM_BACKEND_CMD_PROCESS_CMD: tpm_passthrough_unix_transfer(tpm_pt, - thr_parms->tpm_state->locty_data, + tb->tpm_state->locty_data, &selftest_done); - thr_parms->recv_data_callback(thr_parms->tpm_state, - thr_parms->tpm_state->locty_number, - selftest_done); + tb->recv_data_callback(tb->tpm_state, + tb->tpm_state->locty_number, + selftest_done); break; case TPM_BACKEND_CMD_INIT: case TPM_BACKEND_CMD_END: @@ -248,15 +233,6 @@ static void tpm_passthrough_worker_thread(gpointer data, */ static int tpm_passthrough_startup_tpm(TPMBackend *tb) { - TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); - - /* terminate a running TPM */ - tpm_backend_thread_end(&tpm_pt->tbt); - - tpm_backend_thread_create(&tpm_pt->tbt, - tpm_passthrough_worker_thread, - &tpm_pt->tpm_thread_params); - return 0; } @@ -268,20 +244,11 @@ static void tpm_passthrough_reset(TPMBackend *tb) tpm_passthrough_cancel_cmd(tb); - tpm_backend_thread_end(&tpm_pt->tbt); - tpm_pt->had_startup_error = false; } -static int tpm_passthrough_init(TPMBackend *tb, TPMState *s, - TPMRecvDataCB *recv_data_cb) +static int tpm_passthrough_init(TPMBackend *tb) { - TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); - - tpm_pt->tpm_thread_params.tpm_state = s; - tpm_pt->tpm_thread_params.recv_data_callback = recv_data_cb; - tpm_pt->tpm_thread_params.tb = tb; - return 0; } @@ -315,13 +282,6 @@ static size_t tpm_passthrough_realloc_buffer(TPMSizedBuffer *sb) return sb->size; } -static void tpm_passthrough_deliver_request(TPMBackend *tb) -{ - TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); - - tpm_backend_thread_deliver_request(&tpm_pt->tbt); -} - static void tpm_passthrough_cancel_cmd(TPMBackend *tb) { TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); @@ -483,8 +443,6 @@ static void tpm_passthrough_destroy(TPMBackend *tb) tpm_passthrough_cancel_cmd(tb); - tpm_backend_thread_end(&tpm_pt->tbt); - qemu_close(tpm_pt->tpm_fd); qemu_close(tpm_pt->cancel_fd); @@ -520,7 +478,6 @@ static const TPMDriverOps tpm_passthrough_driver = { .realloc_buffer = tpm_passthrough_realloc_buffer, .reset = tpm_passthrough_reset, .had_startup_error = tpm_passthrough_get_startup_error, - .deliver_request = tpm_passthrough_deliver_request, .cancel_cmd = tpm_passthrough_cancel_cmd, .get_tpm_established_flag = tpm_passthrough_get_tpm_established_flag, .reset_tpm_established_flag = tpm_passthrough_reset_tpm_established_flag, @@ -540,6 +497,7 @@ static void tpm_passthrough_class_init(ObjectClass *klass, void *data) TPMBackendClass *tbc = TPM_BACKEND_CLASS(klass); tbc->ops = &tpm_passthrough_driver; + tbc->handle_request = tpm_passthrough_handle_request; } static const TypeInfo tpm_passthrough_info = { diff --git a/include/sysemu/tpm_backend.h b/include/sysemu/tpm_backend.h index e7f590d..a538a7f 100644 --- a/include/sysemu/tpm_backend.h +++ b/include/sysemu/tpm_backend.h @@ -29,22 +29,24 @@ typedef struct TPMBackendClass TPMBackendClass; typedef struct TPMBackend TPMBackend; - typedef struct TPMDriverOps TPMDriverOps; +typedef void (TPMRecvDataCB)(TPMState *, uint8_t locty, bool selftest_done); -struct TPMBackendClass { - ObjectClass parent_class; - - const TPMDriverOps *ops; - - void (*opened)(TPMBackend *s, Error **errp); -}; +typedef enum TPMBackendCmd { + TPM_BACKEND_CMD_INIT = 1, + TPM_BACKEND_CMD_PROCESS_CMD, + TPM_BACKEND_CMD_END, + TPM_BACKEND_CMD_TPM_RESET, +} TPMBackendCmd; struct TPMBackend { Object parent; /*< protected >*/ bool opened; + TPMState *tpm_state; + GThreadPool *thread_pool; + TPMRecvDataCB *recv_data_callback; char *id; enum TpmModel fe_model; @@ -54,7 +56,15 @@ struct TPMBackend { QLIST_ENTRY(TPMBackend) list; }; -typedef void (TPMRecvDataCB)(TPMState *, uint8_t locty, bool selftest_done); +struct TPMBackendClass { + ObjectClass parent_class; + + const TPMDriverOps *ops; + + void (*opened)(TPMBackend *s, Error **errp); + + void (*handle_request)(TPMBackend *s, TPMBackendCmd cmd); +}; typedef struct TPMSizedBuffer { uint32_t size; @@ -71,7 +81,7 @@ struct TPMDriverOps { void (*destroy)(TPMBackend *t); /* initialize the backend */ - int (*init)(TPMBackend *t, TPMState *s, TPMRecvDataCB *datacb); + int (*init)(TPMBackend *t); /* start up the TPM on the backend */ int (*startup_tpm)(TPMBackend *t); /* returns true if nothing will ever answer TPM requests */ @@ -79,8 +89,6 @@ struct TPMDriverOps { size_t (*realloc_buffer)(TPMSizedBuffer *sb); - void (*deliver_request)(TPMBackend *t); - void (*reset)(TPMBackend *t); void (*cancel_cmd)(TPMBackend *t); diff --git a/include/sysemu/tpm_backend_int.h b/include/sysemu/tpm_backend_int.h deleted file mode 100644 index 00639dd..0000000 --- a/include/sysemu/tpm_backend_int.h +++ /dev/null @@ -1,41 +0,0 @@ -/* - * common TPM backend driver functions - * - * Copyright (c) 2012-2013 IBM Corporation - * Authors: - * Stefan Berger <stefanb@us.ibm.com> - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see <http://www.gnu.org/licenses/> - */ - -#ifndef TPM_BACKEND_INT_H -#define TPM_BACKEND_INT_H - -typedef struct TPMBackendThread { - GThreadPool *pool; -} TPMBackendThread; - -void tpm_backend_thread_deliver_request(TPMBackendThread *tbt); -void tpm_backend_thread_create(TPMBackendThread *tbt, - GFunc func, gpointer user_data); -void tpm_backend_thread_end(TPMBackendThread *tbt); - -typedef enum TPMBackendCmd { - TPM_BACKEND_CMD_INIT = 1, - TPM_BACKEND_CMD_PROCESS_CMD, - TPM_BACKEND_CMD_END, - TPM_BACKEND_CMD_TPM_RESET, -} TPMBackendCmd; - -#endif /* TPM_BACKEND_INT_H */ -- 2.7.4 ^ permalink raw reply related [flat|nested] 24+ messages in thread
* Re: [Qemu-devel] [PATCH v4 2/8] tpm-backend: Move thread handling inside TPMBackend 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 2/8] tpm-backend: Move thread handling inside TPMBackend Amarnath Valluri @ 2017-05-24 14:19 ` Stefan Berger 0 siblings, 0 replies; 24+ messages in thread From: Stefan Berger @ 2017-05-24 14:19 UTC (permalink / raw) To: Amarnath Valluri, qemu-devel On 05/16/2017 03:58 AM, Amarnath Valluri wrote: > Move thread handling inside TPMBackend, this way backend implementations need > not to maintain their own thread life cycle, instead they needs to implement > 'handle_request()' class method that always been called from a thread. > > This change made tpm_backend_int.h kind of useless, hence removed it. > > Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com> ^ permalink raw reply [flat|nested] 24+ messages in thread
* [Qemu-devel] [PATCH v4 3/8] tpm-backend: Initialize and free data members in it's own methods 2017-05-16 7:58 [Qemu-devel] [PATCH v4 0/8] Provide support for the software TPM emulator Amarnath Valluri 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 1/8] tpm-backend: Remove unneeded member variable from backend class Amarnath Valluri 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 2/8] tpm-backend: Move thread handling inside TPMBackend Amarnath Valluri @ 2017-05-16 7:58 ` Amarnath Valluri 2017-05-24 14:24 ` Stefan Berger 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 4/8] tpm-backend: Made few interface methods optional Amarnath Valluri ` (5 subsequent siblings) 8 siblings, 1 reply; 24+ messages in thread From: Amarnath Valluri @ 2017-05-16 7:58 UTC (permalink / raw) To: qemu-devel; +Cc: Amarnath Valluri Initialize and free TPMBackend data members in it's own instance_init() and instance_finalize methods. Took the opportunity to remove unneeded destroy() method from TpmDriverOps interface as TPMBackend is a Qemu Object, we can use object_unref() inplace of tpm_backend_destroy() to free the backend object, hence removed destroy() from TPMDriverOps interface. Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> --- backends/tpm.c | 16 ++++++---------- hw/tpm/tpm_passthrough.c | 31 ++++++++++++------------------- include/sysemu/tpm_backend.h | 7 ------- tpm.c | 2 +- 4 files changed, 19 insertions(+), 37 deletions(-) diff --git a/backends/tpm.c b/backends/tpm.c index ce56c3b..cf5abf1 100644 --- a/backends/tpm.c +++ b/backends/tpm.c @@ -51,15 +51,6 @@ const char *tpm_backend_get_desc(TPMBackend *s) return k->ops->desc(); } -void tpm_backend_destroy(TPMBackend *s) -{ - TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); - - k->ops->destroy(s); - - tpm_backend_thread_end(s); -} - int tpm_backend_init(TPMBackend *s, TPMState *state, TPMRecvDataCB *datacb) { @@ -182,17 +173,22 @@ static void tpm_backend_prop_set_opened(Object *obj, bool value, Error **errp) static void tpm_backend_instance_init(Object *obj) { + TPMBackend *s = TPM_BACKEND(obj); + object_property_add_bool(obj, "opened", tpm_backend_prop_get_opened, tpm_backend_prop_set_opened, NULL); - + s->fe_model = -1; } static void tpm_backend_instance_finalize(Object *obj) { TPMBackend *s = TPM_BACKEND(obj); + g_free(s->id); + g_free(s->path); + g_free(s->cancel_path); tpm_backend_thread_end(s); } diff --git a/hw/tpm/tpm_passthrough.c b/hw/tpm/tpm_passthrough.c index f50d9cf..815a72e 100644 --- a/hw/tpm/tpm_passthrough.c +++ b/hw/tpm/tpm_passthrough.c @@ -417,8 +417,6 @@ static TPMBackend *tpm_passthrough_create(QemuOpts *opts, const char *id) TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); tb->id = g_strdup(id); - /* let frontend set the fe_model to proper value */ - tb->fe_model = -1; if (tpm_passthrough_handle_device_opts(opts, tb)) { goto err_exit; @@ -432,26 +430,11 @@ static TPMBackend *tpm_passthrough_create(QemuOpts *opts, const char *id) return tb; err_exit: - g_free(tb->id); + object_unref(obj); return NULL; } -static void tpm_passthrough_destroy(TPMBackend *tb) -{ - TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); - - tpm_passthrough_cancel_cmd(tb); - - qemu_close(tpm_pt->tpm_fd); - qemu_close(tpm_pt->cancel_fd); - - g_free(tb->id); - g_free(tb->path); - g_free(tb->cancel_path); - g_free(tpm_pt->tpm_dev); -} - static const QemuOptDesc tpm_passthrough_cmdline_opts[] = { TPM_STANDARD_CMDLINE_OPTS, { @@ -472,7 +455,6 @@ static const TPMDriverOps tpm_passthrough_driver = { .opts = tpm_passthrough_cmdline_opts, .desc = tpm_passthrough_create_desc, .create = tpm_passthrough_create, - .destroy = tpm_passthrough_destroy, .init = tpm_passthrough_init, .startup_tpm = tpm_passthrough_startup_tpm, .realloc_buffer = tpm_passthrough_realloc_buffer, @@ -486,10 +468,21 @@ static const TPMDriverOps tpm_passthrough_driver = { static void tpm_passthrough_inst_init(Object *obj) { + TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(obj); + + tpm_pt->tpm_fd = -1; + tpm_pt->cancel_fd = -1; } static void tpm_passthrough_inst_finalize(Object *obj) { + TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(obj); + + tpm_passthrough_cancel_cmd(TPM_BACKEND(obj)); + + qemu_close(tpm_pt->tpm_fd); + qemu_close(tpm_pt->cancel_fd); + g_free(tpm_pt->tpm_dev); } static void tpm_passthrough_class_init(ObjectClass *klass, void *data) diff --git a/include/sysemu/tpm_backend.h b/include/sysemu/tpm_backend.h index a538a7f..f61bcfe 100644 --- a/include/sysemu/tpm_backend.h +++ b/include/sysemu/tpm_backend.h @@ -78,7 +78,6 @@ struct TPMDriverOps { const char *(*desc)(void); TPMBackend *(*create)(QemuOpts *opts, const char *id); - void (*destroy)(TPMBackend *t); /* initialize the backend */ int (*init)(TPMBackend *t); @@ -118,12 +117,6 @@ enum TpmType tpm_backend_get_type(TPMBackend *s); const char *tpm_backend_get_desc(TPMBackend *s); /** - * tpm_backend_destroy: - * @s: the backend to destroy - */ -void tpm_backend_destroy(TPMBackend *s); - -/** * tpm_backend_init: * @s: the backend to initialized * @state: TPMState diff --git a/tpm.c b/tpm.c index 0ee021a..70f74fa 100644 --- a/tpm.c +++ b/tpm.c @@ -197,7 +197,7 @@ void tpm_cleanup(void) QLIST_FOREACH_SAFE(drv, &tpm_backends, list, next) { QLIST_REMOVE(drv, list); - tpm_backend_destroy(drv); + object_unref(OBJECT(drv)); } } -- 2.7.4 ^ permalink raw reply related [flat|nested] 24+ messages in thread
* Re: [Qemu-devel] [PATCH v4 3/8] tpm-backend: Initialize and free data members in it's own methods 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 3/8] tpm-backend: Initialize and free data members in it's own methods Amarnath Valluri @ 2017-05-24 14:24 ` Stefan Berger 0 siblings, 0 replies; 24+ messages in thread From: Stefan Berger @ 2017-05-24 14:24 UTC (permalink / raw) To: Amarnath Valluri, qemu-devel On 05/16/2017 03:58 AM, Amarnath Valluri wrote: > Initialize and free TPMBackend data members in it's own instance_init() and > instance_finalize methods. > > Took the opportunity to remove unneeded destroy() method from TpmDriverOps > interface as TPMBackend is a Qemu Object, we can use object_unref() inplace of > tpm_backend_destroy() to free the backend object, hence removed destroy() from > TPMDriverOps interface. > > Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com> ^ permalink raw reply [flat|nested] 24+ messages in thread
* [Qemu-devel] [PATCH v4 4/8] tpm-backend: Made few interface methods optional 2017-05-16 7:58 [Qemu-devel] [PATCH v4 0/8] Provide support for the software TPM emulator Amarnath Valluri ` (2 preceding siblings ...) 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 3/8] tpm-backend: Initialize and free data members in it's own methods Amarnath Valluri @ 2017-05-16 7:58 ` Amarnath Valluri 2017-05-24 14:28 ` Stefan Berger 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 5/8] tmp backend: Add new api to read backend TpmInfo Amarnath Valluri ` (4 subsequent siblings) 8 siblings, 1 reply; 24+ messages in thread From: Amarnath Valluri @ 2017-05-16 7:58 UTC (permalink / raw) To: qemu-devel; +Cc: Amarnath Valluri This allows backend implementations left optional interface methods. For mandatory methods assertion checks added. Took the opportunity to remove unused methods: tpm_backend_get_type() tpm_backend_get_desc() Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> --- backends/tpm.c | 36 +++++++++++++++++------------------- hw/tpm/tpm_passthrough.c | 23 +---------------------- include/sysemu/tpm_backend.h | 19 +------------------ tpm.c | 2 +- 4 files changed, 20 insertions(+), 60 deletions(-) diff --git a/backends/tpm.c b/backends/tpm.c index cf5abf1..05002e6 100644 --- a/backends/tpm.c +++ b/backends/tpm.c @@ -37,20 +37,6 @@ static void tpm_backend_thread_end(TPMBackend *s) } } -enum TpmType tpm_backend_get_type(TPMBackend *s) -{ - TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); - - return k->ops->type; -} - -const char *tpm_backend_get_desc(TPMBackend *s) -{ - TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); - - return k->ops->desc(); -} - int tpm_backend_init(TPMBackend *s, TPMState *state, TPMRecvDataCB *datacb) { @@ -59,7 +45,7 @@ int tpm_backend_init(TPMBackend *s, TPMState *state, s->tpm_state = state; s->recv_data_callback = datacb; - return k->ops->init(s); + return k->ops->init ? k->ops->init(s) : 0; } int tpm_backend_startup_tpm(TPMBackend *s) @@ -73,13 +59,15 @@ int tpm_backend_startup_tpm(TPMBackend *s) NULL); g_thread_pool_push(s->thread_pool, (gpointer)TPM_BACKEND_CMD_INIT, NULL); - return k->ops->startup_tpm(s); + return k->ops->startup_tpm ? k->ops->startup_tpm(s) : 0; } bool tpm_backend_had_startup_error(TPMBackend *s) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); + assert(k->ops->had_startup_error); + return k->ops->had_startup_error(s); } @@ -87,6 +75,8 @@ size_t tpm_backend_realloc_buffer(TPMBackend *s, TPMSizedBuffer *sb) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); + assert(k->ops->realloc_buffer); + return k->ops->realloc_buffer(sb); } @@ -100,7 +90,9 @@ void tpm_backend_reset(TPMBackend *s) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); - k->ops->reset(s); + if (k->ops->reset) { + k->ops->reset(s); + } tpm_backend_thread_end(s); } @@ -109,6 +101,8 @@ void tpm_backend_cancel_cmd(TPMBackend *s) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); + assert(k->ops->cancel_cmd); + k->ops->cancel_cmd(s); } @@ -116,20 +110,24 @@ bool tpm_backend_get_tpm_established_flag(TPMBackend *s) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); - return k->ops->get_tpm_established_flag(s); + return k->ops->get_tpm_established_flag ? + k->ops->get_tpm_established_flag(s) : false; } int tpm_backend_reset_tpm_established_flag(TPMBackend *s, uint8_t locty) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); - return k->ops->reset_tpm_established_flag(s, locty); + return k->ops->reset_tpm_established_flag ? + k->ops->reset_tpm_established_flag(s, locty) : 0; } TPMVersion tpm_backend_get_tpm_version(TPMBackend *s) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); + assert(k->ops->get_tpm_version); + return k->ops->get_tpm_version(s); } diff --git a/hw/tpm/tpm_passthrough.c b/hw/tpm/tpm_passthrough.c index 815a72e..a0459a6 100644 --- a/hw/tpm/tpm_passthrough.c +++ b/hw/tpm/tpm_passthrough.c @@ -227,15 +227,6 @@ static void tpm_passthrough_handle_request(TPMBackend *tb, TPMBackendCmd cmd) } } -/* - * Start the TPM (thread). If it had been started before, then terminate - * and start it again. - */ -static int tpm_passthrough_startup_tpm(TPMBackend *tb) -{ - return 0; -} - static void tpm_passthrough_reset(TPMBackend *tb) { TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); @@ -247,11 +238,6 @@ static void tpm_passthrough_reset(TPMBackend *tb) tpm_pt->had_startup_error = false; } -static int tpm_passthrough_init(TPMBackend *tb) -{ - return 0; -} - static bool tpm_passthrough_get_tpm_established_flag(TPMBackend *tb) { return false; @@ -309,11 +295,6 @@ static void tpm_passthrough_cancel_cmd(TPMBackend *tb) } } -static const char *tpm_passthrough_create_desc(void) -{ - return "Passthrough TPM backend driver"; -} - static TPMVersion tpm_passthrough_get_tpm_version(TPMBackend *tb) { TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); @@ -453,10 +434,8 @@ static const QemuOptDesc tpm_passthrough_cmdline_opts[] = { static const TPMDriverOps tpm_passthrough_driver = { .type = TPM_TYPE_PASSTHROUGH, .opts = tpm_passthrough_cmdline_opts, - .desc = tpm_passthrough_create_desc, + .desc = "Passthrough TPM backend driver", .create = tpm_passthrough_create, - .init = tpm_passthrough_init, - .startup_tpm = tpm_passthrough_startup_tpm, .realloc_buffer = tpm_passthrough_realloc_buffer, .reset = tpm_passthrough_reset, .had_startup_error = tpm_passthrough_get_startup_error, diff --git a/include/sysemu/tpm_backend.h b/include/sysemu/tpm_backend.h index f61bcfe..d6ae463 100644 --- a/include/sysemu/tpm_backend.h +++ b/include/sysemu/tpm_backend.h @@ -75,7 +75,7 @@ struct TPMDriverOps { enum TpmType type; const QemuOptDesc *opts; /* get a descriptive text of the backend to display to the user */ - const char *(*desc)(void); + const char *desc; TPMBackend *(*create)(QemuOpts *opts, const char *id); @@ -99,23 +99,6 @@ struct TPMDriverOps { TPMVersion (*get_tpm_version)(TPMBackend *t); }; - -/** - * tpm_backend_get_type: - * @s: the backend - * - * Returns the TpmType of the backend. - */ -enum TpmType tpm_backend_get_type(TPMBackend *s); - -/** - * tpm_backend_get_desc: - * @s: the backend - * - * Returns a human readable description of the backend. - */ -const char *tpm_backend_get_desc(TPMBackend *s); - /** * tpm_backend_init: * @s: the backend to initialized diff --git a/tpm.c b/tpm.c index 70f74fa..2979508 100644 --- a/tpm.c +++ b/tpm.c @@ -102,7 +102,7 @@ static void tpm_display_backend_drivers(void) for (i = 0; i < TPM_MAX_DRIVERS && be_drivers[i] != NULL; i++) { fprintf(stderr, "%12s %s\n", - TpmType_lookup[be_drivers[i]->type], be_drivers[i]->desc()); + TpmType_lookup[be_drivers[i]->type], be_drivers[i]->desc); } fprintf(stderr, "\n"); } -- 2.7.4 ^ permalink raw reply related [flat|nested] 24+ messages in thread
* Re: [Qemu-devel] [PATCH v4 4/8] tpm-backend: Made few interface methods optional 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 4/8] tpm-backend: Made few interface methods optional Amarnath Valluri @ 2017-05-24 14:28 ` Stefan Berger 0 siblings, 0 replies; 24+ messages in thread From: Stefan Berger @ 2017-05-24 14:28 UTC (permalink / raw) To: Amarnath Valluri, qemu-devel On 05/16/2017 03:58 AM, Amarnath Valluri wrote: > This allows backend implementations left optional interface methods. > For mandatory methods assertion checks added. > > Took the opportunity to remove unused methods: > tpm_backend_get_type() > tpm_backend_get_desc() > > Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> Reviewed-by: Stefan Berger<stefanb@linux.vnet.ibm.com> ^ permalink raw reply [flat|nested] 24+ messages in thread
* [Qemu-devel] [PATCH v4 5/8] tmp backend: Add new api to read backend TpmInfo 2017-05-16 7:58 [Qemu-devel] [PATCH v4 0/8] Provide support for the software TPM emulator Amarnath Valluri ` (3 preceding siblings ...) 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 4/8] tpm-backend: Made few interface methods optional Amarnath Valluri @ 2017-05-16 7:58 ` Amarnath Valluri 2017-05-24 14:34 ` Stefan Berger 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 6/8] tpm-backend: Move realloc_buffer() implementation to tpm-tis model Amarnath Valluri ` (3 subsequent siblings) 8 siblings, 1 reply; 24+ messages in thread From: Amarnath Valluri @ 2017-05-16 7:58 UTC (permalink / raw) To: qemu-devel; +Cc: Amarnath Valluri TPM configuration options are backend implementation details and shall not be part of base TPMBackend object, and these shall not be accessed directly outside of the class, hence added a new interface method, get_tpm_options() to TPMDriverOps., which shall be implemented by the derived classes to return configured tpm options. A new tpm backend api - tpm_backend_query_tpm() which uses _get_tpm_options() to prepare TpmInfo. Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> --- backends/tpm.c | 22 +++++++++++++-- hmp.c | 6 ++--- hw/tpm/tpm_passthrough.c | 64 ++++++++++++++++++++++++++++++++++++-------- include/sysemu/tpm_backend.h | 25 +++++++++++++++-- tpm.c | 32 +--------------------- 5 files changed, 100 insertions(+), 49 deletions(-) diff --git a/backends/tpm.c b/backends/tpm.c index 05002e6..4ae6129 100644 --- a/backends/tpm.c +++ b/backends/tpm.c @@ -131,6 +131,26 @@ TPMVersion tpm_backend_get_tpm_version(TPMBackend *s) return k->ops->get_tpm_version(s); } +TpmTypeOptions *tpm_backend_get_tpm_options(TPMBackend *s) +{ + TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); + + assert(k->ops->get_tpm_options); + + return k->ops->get_tpm_options(s); +} + +TPMInfo *tpm_backend_query_tpm(TPMBackend *s) +{ + TPMInfo *info = g_new0(TPMInfo, 1); + + info->id = g_strdup(s->id); + info->model = s->fe_model; + info->options = tpm_backend_get_tpm_options(s); + + return info; +} + static bool tpm_backend_prop_get_opened(Object *obj, Error **errp) { TPMBackend *s = TPM_BACKEND(obj); @@ -185,8 +205,6 @@ static void tpm_backend_instance_finalize(Object *obj) TPMBackend *s = TPM_BACKEND(obj); g_free(s->id); - g_free(s->path); - g_free(s->cancel_path); tpm_backend_thread_end(s); } diff --git a/hmp.c b/hmp.c index 524e589..9338938 100644 --- a/hmp.c +++ b/hmp.c @@ -956,10 +956,10 @@ void hmp_info_tpm(Monitor *mon, const QDict *qdict) c, TpmModel_lookup[ti->model]); monitor_printf(mon, " \\ %s: type=%s", - ti->id, TpmTypeOptionsKind_lookup[ti->options->type]); + ti->id, TpmType_lookup[ti->options->type]); switch (ti->options->type) { - case TPM_TYPE_OPTIONS_KIND_PASSTHROUGH: + case TPM_TYPE_PASSTHROUGH: tpo = ti->options->u.passthrough.data; monitor_printf(mon, "%s%s%s%s", tpo->has_path ? ",path=" : "", @@ -967,7 +967,7 @@ void hmp_info_tpm(Monitor *mon, const QDict *qdict) tpo->has_cancel_path ? ",cancel-path=" : "", tpo->has_cancel_path ? tpo->cancel_path : ""); break; - case TPM_TYPE_OPTIONS_KIND__MAX: + default: break; } monitor_printf(mon, "\n"); diff --git a/hw/tpm/tpm_passthrough.c b/hw/tpm/tpm_passthrough.c index a0459a6..c7706e4 100644 --- a/hw/tpm/tpm_passthrough.c +++ b/hw/tpm/tpm_passthrough.c @@ -49,6 +49,7 @@ struct TPMPassthruState { TPMBackend parent; + TPMPassthroughOptions *ops; char *tpm_dev; int tpm_fd; bool tpm_executing; @@ -308,15 +309,14 @@ static TPMVersion tpm_passthrough_get_tpm_version(TPMBackend *tb) * in Documentation/ABI/stable/sysfs-class-tpm. * From /dev/tpm0 create /sys/class/misc/tpm0/device/cancel */ -static int tpm_passthrough_open_sysfs_cancel(TPMBackend *tb) +static int tpm_passthrough_open_sysfs_cancel(TPMPassthruState *tpm_pt) { - TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); int fd = -1; char *dev; char path[PATH_MAX]; - if (tb->cancel_path) { - fd = qemu_open(tb->cancel_path, O_WRONLY); + if (tpm_pt->ops->cancel_path) { + fd = qemu_open(tpm_pt->ops->cancel_path, O_WRONLY); if (fd < 0) { error_report("Could not open TPM cancel path : %s", strerror(errno)); @@ -331,7 +331,7 @@ static int tpm_passthrough_open_sysfs_cancel(TPMBackend *tb) dev) < sizeof(path)) { fd = qemu_open(path, O_WRONLY); if (fd >= 0) { - tb->cancel_path = g_strdup(path); + tpm_pt->ops->cancel_path = g_strdup(path); } else { error_report("tpm_passthrough: Could not open TPM cancel " "path %s : %s", path, strerror(errno)); @@ -351,17 +351,24 @@ static int tpm_passthrough_handle_device_opts(QemuOpts *opts, TPMBackend *tb) const char *value; value = qemu_opt_get(opts, "cancel-path"); - tb->cancel_path = g_strdup(value); + if (value) { + tpm_pt->ops->cancel_path = g_strdup(value); + tpm_pt->ops->has_cancel_path = true; + } else { + tpm_pt->ops->has_cancel_path = false; + } value = qemu_opt_get(opts, "path"); if (!value) { value = TPM_PASSTHROUGH_DEFAULT_DEVICE; + tpm_pt->ops->has_path = false; + } else { + tpm_pt->ops->has_path = true; } + tpm_pt->ops->path = g_strdup(value); tpm_pt->tpm_dev = g_strdup(value); - tb->path = g_strdup(tpm_pt->tpm_dev); - tpm_pt->tpm_fd = qemu_open(tpm_pt->tpm_dev, O_RDWR); if (tpm_pt->tpm_fd < 0) { error_report("Cannot access TPM device using '%s': %s", @@ -382,8 +389,8 @@ static int tpm_passthrough_handle_device_opts(QemuOpts *opts, TPMBackend *tb) tpm_pt->tpm_fd = -1; err_free_parameters: - g_free(tb->path); - tb->path = NULL; + g_free(tpm_pt->ops->path); + tpm_pt->ops->path = NULL; g_free(tpm_pt->tpm_dev); tpm_pt->tpm_dev = NULL; @@ -403,7 +410,7 @@ static TPMBackend *tpm_passthrough_create(QemuOpts *opts, const char *id) goto err_exit; } - tpm_pt->cancel_fd = tpm_passthrough_open_sysfs_cancel(tb); + tpm_pt->cancel_fd = tpm_passthrough_open_sysfs_cancel(tpm_pt); if (tpm_pt->cancel_fd < 0) { goto err_exit; } @@ -416,6 +423,38 @@ err_exit: return NULL; } +static TpmTypeOptions *tpm_passthrough_get_tpm_options(TPMBackend *tb) +{ + TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); + TpmTypeOptions *ops = NULL; + TPMPassthroughOptions *pops = NULL; + + pops = g_new0(TPMPassthroughOptions, 1); + if (!pops) { + return NULL; + } + + if (tpm_pt->ops->has_path) { + pops->has_path = true; + pops->path = g_strdup(tpm_pt->ops->path); + } + + if (tpm_pt->ops->has_cancel_path) { + pops->has_cancel_path = true; + pops->cancel_path = g_strdup(tpm_pt->ops->cancel_path); + } + + ops = g_new0(TpmTypeOptions, 1); + if (!ops) { + qapi_free_TPMPassthroughOptions(pops); + return NULL; + } + ops->type = TPM_TYPE_PASSTHROUGH; + ops->u.passthrough.data = pops; + + return ops; +} + static const QemuOptDesc tpm_passthrough_cmdline_opts[] = { TPM_STANDARD_CMDLINE_OPTS, { @@ -443,12 +482,14 @@ static const TPMDriverOps tpm_passthrough_driver = { .get_tpm_established_flag = tpm_passthrough_get_tpm_established_flag, .reset_tpm_established_flag = tpm_passthrough_reset_tpm_established_flag, .get_tpm_version = tpm_passthrough_get_tpm_version, + .get_tpm_options = tpm_passthrough_get_tpm_options, }; static void tpm_passthrough_inst_init(Object *obj) { TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(obj); + tpm_pt->ops = g_new0(TPMPassthroughOptions, 1); tpm_pt->tpm_fd = -1; tpm_pt->cancel_fd = -1; } @@ -462,6 +503,7 @@ static void tpm_passthrough_inst_finalize(Object *obj) qemu_close(tpm_pt->tpm_fd); qemu_close(tpm_pt->cancel_fd); g_free(tpm_pt->tpm_dev); + qapi_free_TPMPassthroughOptions(tpm_pt->ops); } static void tpm_passthrough_class_init(ObjectClass *klass, void *data) diff --git a/include/sysemu/tpm_backend.h b/include/sysemu/tpm_backend.h index d6ae463..6e5bb8d 100644 --- a/include/sysemu/tpm_backend.h +++ b/include/sysemu/tpm_backend.h @@ -48,10 +48,9 @@ struct TPMBackend { GThreadPool *thread_pool; TPMRecvDataCB *recv_data_callback; + /* <public> */ char *id; enum TpmModel fe_model; - char *path; - char *cancel_path; QLIST_ENTRY(TPMBackend) list; }; @@ -97,6 +96,8 @@ struct TPMDriverOps { int (*reset_tpm_established_flag)(TPMBackend *t, uint8_t locty); TPMVersion (*get_tpm_version)(TPMBackend *t); + + TpmTypeOptions *(*get_tpm_options)(TPMBackend *t); }; /** @@ -206,6 +207,26 @@ void tpm_backend_open(TPMBackend *s, Error **errp); */ TPMVersion tpm_backend_get_tpm_version(TPMBackend *s); +/** + * tpm_backend_get_tpm_options: + * @s: the backend + * + * Get the backend configuration options + * + * Returns newly allocated TpmTypeOptions + */ +TpmTypeOptions *tpm_backend_get_tpm_options(TPMBackend *s); + +/** + * tpm_backend_query_tpm: + * @s: the backend + * + * Query backend tpm info + * + * Returns newly allocated TPMInfo + */ +TPMInfo *tpm_backend_query_tpm(TPMBackend *s); + TPMBackend *qemu_find_tpm(const char *id); const TPMDriverOps *tpm_get_backend_driver(const char *type); diff --git a/tpm.c b/tpm.c index 2979508..84e9667 100644 --- a/tpm.c +++ b/tpm.c @@ -249,36 +249,6 @@ static const TPMDriverOps *tpm_driver_find_by_type(enum TpmType type) return NULL; } -static TPMInfo *qmp_query_tpm_inst(TPMBackend *drv) -{ - TPMInfo *res = g_new0(TPMInfo, 1); - TPMPassthroughOptions *tpo; - - res->id = g_strdup(drv->id); - res->model = drv->fe_model; - res->options = g_new0(TpmTypeOptions, 1); - - switch (tpm_backend_get_type(drv)) { - case TPM_TYPE_PASSTHROUGH: - res->options->type = TPM_TYPE_OPTIONS_KIND_PASSTHROUGH; - tpo = g_new0(TPMPassthroughOptions, 1); - res->options->u.passthrough.data = tpo; - if (drv->path) { - tpo->path = g_strdup(drv->path); - tpo->has_path = true; - } - if (drv->cancel_path) { - tpo->cancel_path = g_strdup(drv->cancel_path); - tpo->has_cancel_path = true; - } - break; - case TPM_TYPE__MAX: - break; - } - - return res; -} - /* * Walk the list of active TPM backends and collect information about them * following the schema description in qapi-schema.json. @@ -293,7 +263,7 @@ TPMInfoList *qmp_query_tpm(Error **errp) continue; } info = g_new0(TPMInfoList, 1); - info->value = qmp_query_tpm_inst(drv); + info->value = tpm_backend_query_tpm(drv); if (!cur_item) { head = cur_item = info; -- 2.7.4 ^ permalink raw reply related [flat|nested] 24+ messages in thread
* Re: [Qemu-devel] [PATCH v4 5/8] tmp backend: Add new api to read backend TpmInfo 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 5/8] tmp backend: Add new api to read backend TpmInfo Amarnath Valluri @ 2017-05-24 14:34 ` Stefan Berger 0 siblings, 0 replies; 24+ messages in thread From: Stefan Berger @ 2017-05-24 14:34 UTC (permalink / raw) To: Amarnath Valluri, qemu-devel On 05/16/2017 03:58 AM, Amarnath Valluri wrote: > TPM configuration options are backend implementation details and shall not be > part of base TPMBackend object, and these shall not be accessed directly outside > of the class, hence added a new interface method, get_tpm_options() to > TPMDriverOps., which shall be implemented by the derived classes to return > configured tpm options. > > A new tpm backend api - tpm_backend_query_tpm() which uses _get_tpm_options() to > prepare TpmInfo. > > Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com> ^ permalink raw reply [flat|nested] 24+ messages in thread
* [Qemu-devel] [PATCH v4 6/8] tpm-backend: Move realloc_buffer() implementation to tpm-tis model 2017-05-16 7:58 [Qemu-devel] [PATCH v4 0/8] Provide support for the software TPM emulator Amarnath Valluri ` (4 preceding siblings ...) 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 5/8] tmp backend: Add new api to read backend TpmInfo Amarnath Valluri @ 2017-05-16 7:58 ` Amarnath Valluri 2017-05-24 14:37 ` Stefan Berger 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 7/8] tpm-passthrough: move reusable code to utils Amarnath Valluri ` (2 subsequent siblings) 8 siblings, 1 reply; 24+ messages in thread From: Amarnath Valluri @ 2017-05-16 7:58 UTC (permalink / raw) To: qemu-devel; +Cc: Amarnath Valluri buffer reallocation is very unlikely to be backend specific. Hence move inside the tis. Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> --- backends/tpm.c | 9 --------- hw/tpm/tpm_passthrough.c | 12 ------------ hw/tpm/tpm_tis.c | 14 ++++++++++++-- include/sysemu/tpm_backend.h | 12 ------------ 4 files changed, 12 insertions(+), 35 deletions(-) diff --git a/backends/tpm.c b/backends/tpm.c index 4ae6129..3519570 100644 --- a/backends/tpm.c +++ b/backends/tpm.c @@ -71,15 +71,6 @@ bool tpm_backend_had_startup_error(TPMBackend *s) return k->ops->had_startup_error(s); } -size_t tpm_backend_realloc_buffer(TPMBackend *s, TPMSizedBuffer *sb) -{ - TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); - - assert(k->ops->realloc_buffer); - - return k->ops->realloc_buffer(sb); -} - void tpm_backend_deliver_request(TPMBackend *s) { g_thread_pool_push(s->thread_pool, (gpointer)TPM_BACKEND_CMD_PROCESS_CMD, diff --git a/hw/tpm/tpm_passthrough.c b/hw/tpm/tpm_passthrough.c index c7706e4..4ac47ed 100644 --- a/hw/tpm/tpm_passthrough.c +++ b/hw/tpm/tpm_passthrough.c @@ -258,17 +258,6 @@ static bool tpm_passthrough_get_startup_error(TPMBackend *tb) return tpm_pt->had_startup_error; } -static size_t tpm_passthrough_realloc_buffer(TPMSizedBuffer *sb) -{ - size_t wanted_size = 4096; /* Linux tpm.c buffer size */ - - if (sb->size != wanted_size) { - sb->buffer = g_realloc(sb->buffer, wanted_size); - sb->size = wanted_size; - } - return sb->size; -} - static void tpm_passthrough_cancel_cmd(TPMBackend *tb) { TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); @@ -475,7 +464,6 @@ static const TPMDriverOps tpm_passthrough_driver = { .opts = tpm_passthrough_cmdline_opts, .desc = "Passthrough TPM backend driver", .create = tpm_passthrough_create, - .realloc_buffer = tpm_passthrough_realloc_buffer, .reset = tpm_passthrough_reset, .had_startup_error = tpm_passthrough_get_startup_error, .cancel_cmd = tpm_passthrough_cancel_cmd, diff --git a/hw/tpm/tpm_tis.c b/hw/tpm/tpm_tis.c index a6440fe..d5118e7 100644 --- a/hw/tpm/tpm_tis.c +++ b/hw/tpm/tpm_tis.c @@ -963,6 +963,16 @@ static int tpm_tis_do_startup_tpm(TPMState *s) return tpm_backend_startup_tpm(s->be_driver); } +static void tpm_tis_realloc_buffer(TPMSizedBuffer *sb) +{ + size_t wanted_size = 4096; /* Linux tpm.c buffer size */ + + if (sb->size != wanted_size) { + sb->buffer = g_realloc(sb->buffer, wanted_size); + sb->size = wanted_size; + } +} + /* * Get the TPMVersion of the backend device being used */ @@ -1010,9 +1020,9 @@ static void tpm_tis_reset(DeviceState *dev) tis->loc[c].state = TPM_TIS_STATE_IDLE; tis->loc[c].w_offset = 0; - tpm_backend_realloc_buffer(s->be_driver, &tis->loc[c].w_buffer); + tpm_tis_realloc_buffer(&tis->loc[c].w_buffer); tis->loc[c].r_offset = 0; - tpm_backend_realloc_buffer(s->be_driver, &tis->loc[c].r_buffer); + tpm_tis_realloc_buffer(&tis->loc[c].r_buffer); } tpm_tis_do_startup_tpm(s); diff --git a/include/sysemu/tpm_backend.h b/include/sysemu/tpm_backend.h index 6e5bb8d..bebfba3 100644 --- a/include/sysemu/tpm_backend.h +++ b/include/sysemu/tpm_backend.h @@ -85,8 +85,6 @@ struct TPMDriverOps { /* returns true if nothing will ever answer TPM requests */ bool (*had_startup_error)(TPMBackend *t); - size_t (*realloc_buffer)(TPMSizedBuffer *sb); - void (*reset)(TPMBackend *t); void (*cancel_cmd)(TPMBackend *t); @@ -132,16 +130,6 @@ int tpm_backend_startup_tpm(TPMBackend *s); bool tpm_backend_had_startup_error(TPMBackend *s); /** - * tpm_backend_realloc_buffer: - * @s: the backend - * @sb: the TPMSizedBuffer to re-allocated to the size suitable for the - * backend. - * - * This function returns the size of the allocated buffer - */ -size_t tpm_backend_realloc_buffer(TPMBackend *s, TPMSizedBuffer *sb); - -/** * tpm_backend_deliver_request: * @s: the backend to send the request to * -- 2.7.4 ^ permalink raw reply related [flat|nested] 24+ messages in thread
* Re: [Qemu-devel] [PATCH v4 6/8] tpm-backend: Move realloc_buffer() implementation to tpm-tis model 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 6/8] tpm-backend: Move realloc_buffer() implementation to tpm-tis model Amarnath Valluri @ 2017-05-24 14:37 ` Stefan Berger 0 siblings, 0 replies; 24+ messages in thread From: Stefan Berger @ 2017-05-24 14:37 UTC (permalink / raw) To: Amarnath Valluri, qemu-devel On 05/16/2017 03:58 AM, Amarnath Valluri wrote: > buffer reallocation is very unlikely to be backend specific. Hence move inside > the tis. > > Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com> ^ permalink raw reply [flat|nested] 24+ messages in thread
* [Qemu-devel] [PATCH v4 7/8] tpm-passthrough: move reusable code to utils 2017-05-16 7:58 [Qemu-devel] [PATCH v4 0/8] Provide support for the software TPM emulator Amarnath Valluri ` (5 preceding siblings ...) 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 6/8] tpm-backend: Move realloc_buffer() implementation to tpm-tis model Amarnath Valluri @ 2017-05-16 7:58 ` Amarnath Valluri 2017-05-24 14:39 ` Stefan Berger 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 8/8] tpm: Added support for TPM emulator Amarnath Valluri 2017-05-22 12:40 ` [Qemu-devel] [PATCH v4 0/8] Provide support for the software " Valluri, Amarnath 8 siblings, 1 reply; 24+ messages in thread From: Amarnath Valluri @ 2017-05-16 7:58 UTC (permalink / raw) To: qemu-devel; +Cc: Amarnath Valluri Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> --- hw/tpm/tpm_passthrough.c | 64 ++++-------------------------------------------- hw/tpm/tpm_util.c | 25 +++++++++++++++++++ hw/tpm/tpm_util.h | 4 +++ 3 files changed, 34 insertions(+), 59 deletions(-) diff --git a/hw/tpm/tpm_passthrough.c b/hw/tpm/tpm_passthrough.c index 4ac47ed..592fd1f 100644 --- a/hw/tpm/tpm_passthrough.c +++ b/hw/tpm/tpm_passthrough.c @@ -68,27 +68,6 @@ typedef struct TPMPassthruState TPMPassthruState; static void tpm_passthrough_cancel_cmd(TPMBackend *tb); -static int tpm_passthrough_unix_write(int fd, const uint8_t *buf, uint32_t len) -{ - int ret, remain; - - remain = len; - while (remain > 0) { - ret = write(fd, buf, remain); - if (ret < 0) { - if (errno != EINTR && errno != EAGAIN) { - return -1; - } - } else if (ret == 0) { - break; - } else { - buf += ret; - remain -= ret; - } - } - return len - remain; -} - static int tpm_passthrough_unix_read(int fd, uint8_t *buf, uint32_t len) { int ret; @@ -102,45 +81,12 @@ static int tpm_passthrough_unix_read(int fd, uint8_t *buf, uint32_t len) } return ret; } - -static uint32_t tpm_passthrough_get_size_from_buffer(const uint8_t *buf) -{ - struct tpm_resp_hdr *resp = (struct tpm_resp_hdr *)buf; - - return be32_to_cpu(resp->len); -} - -/* - * Write an error message in the given output buffer. - */ -static void tpm_write_fatal_error_response(uint8_t *out, uint32_t out_len) -{ - if (out_len >= sizeof(struct tpm_resp_hdr)) { - struct tpm_resp_hdr *resp = (struct tpm_resp_hdr *)out; - - resp->tag = cpu_to_be16(TPM_TAG_RSP_COMMAND); - resp->len = cpu_to_be32(sizeof(struct tpm_resp_hdr)); - resp->errcode = cpu_to_be32(TPM_FAIL); - } -} - -static bool tpm_passthrough_is_selftest(const uint8_t *in, uint32_t in_len) -{ - struct tpm_req_hdr *hdr = (struct tpm_req_hdr *)in; - - if (in_len >= sizeof(*hdr)) { - return (be32_to_cpu(hdr->ordinal) == TPM_ORD_ContinueSelfTest); - } - - return false; -} - static int tpm_passthrough_unix_tx_bufs(TPMPassthruState *tpm_pt, const uint8_t *in, uint32_t in_len, uint8_t *out, uint32_t out_len, bool *selftest_done) { - int ret; + ssize_t ret; bool is_selftest; const struct tpm_resp_hdr *hdr; @@ -148,9 +94,9 @@ static int tpm_passthrough_unix_tx_bufs(TPMPassthruState *tpm_pt, tpm_pt->tpm_executing = true; *selftest_done = false; - is_selftest = tpm_passthrough_is_selftest(in, in_len); + is_selftest = tpm_util_is_selftest(in, in_len); - ret = tpm_passthrough_unix_write(tpm_pt->tpm_fd, in, in_len); + ret = qemu_write_full(tpm_pt->tpm_fd, (const void *)in, (size_t)in_len); if (ret != in_len) { if (!tpm_pt->tpm_op_canceled || errno != ECANCELED) { error_report("tpm_passthrough: error while transmitting data " @@ -170,7 +116,7 @@ static int tpm_passthrough_unix_tx_bufs(TPMPassthruState *tpm_pt, strerror(errno), errno); } } else if (ret < sizeof(struct tpm_resp_hdr) || - tpm_passthrough_get_size_from_buffer(out) != ret) { + be32_to_cpu(((struct tpm_resp_hdr *)out)->len) != ret) { ret = -1; error_report("tpm_passthrough: received invalid response " "packet from TPM"); @@ -183,7 +129,7 @@ static int tpm_passthrough_unix_tx_bufs(TPMPassthruState *tpm_pt, err_exit: if (ret < 0) { - tpm_write_fatal_error_response(out, out_len); + tpm_util_write_fatal_error_response(out, out_len); } tpm_pt->tpm_executing = false; diff --git a/hw/tpm/tpm_util.c b/hw/tpm/tpm_util.c index 7b35429..fb929f6 100644 --- a/hw/tpm/tpm_util.c +++ b/hw/tpm/tpm_util.c @@ -24,6 +24,31 @@ #include "tpm_int.h" /* + * Write an error message in the given output buffer. + */ +void tpm_util_write_fatal_error_response(uint8_t *out, uint32_t out_len) +{ + if (out_len >= sizeof(struct tpm_resp_hdr)) { + struct tpm_resp_hdr *resp = (struct tpm_resp_hdr *)out; + + resp->tag = cpu_to_be16(TPM_TAG_RSP_COMMAND); + resp->len = cpu_to_be32(sizeof(struct tpm_resp_hdr)); + resp->errcode = cpu_to_be32(TPM_FAIL); + } +} + +bool tpm_util_is_selftest(const uint8_t *in, uint32_t in_len) +{ + struct tpm_req_hdr *hdr = (struct tpm_req_hdr *)in; + + if (in_len >= sizeof(*hdr)) { + return (be32_to_cpu(hdr->ordinal) == TPM_ORD_ContinueSelfTest); + } + + return false; +} + +/* * A basic test of a TPM device. We expect a well formatted response header * (error response is fine) within one second. */ diff --git a/hw/tpm/tpm_util.h b/hw/tpm/tpm_util.h index df76245..2f7c961 100644 --- a/hw/tpm/tpm_util.h +++ b/hw/tpm/tpm_util.h @@ -24,6 +24,10 @@ #include "sysemu/tpm_backend.h" +void tpm_util_write_fatal_error_response(uint8_t *out, uint32_t out_len); + +bool tpm_util_is_selftest(const uint8_t *in, uint32_t in_len); + int tpm_util_test_tpmdev(int tpm_fd, TPMVersion *tpm_version); #endif /* TPM_TPM_UTIL_H */ -- 2.7.4 ^ permalink raw reply related [flat|nested] 24+ messages in thread
* Re: [Qemu-devel] [PATCH v4 7/8] tpm-passthrough: move reusable code to utils 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 7/8] tpm-passthrough: move reusable code to utils Amarnath Valluri @ 2017-05-24 14:39 ` Stefan Berger 0 siblings, 0 replies; 24+ messages in thread From: Stefan Berger @ 2017-05-24 14:39 UTC (permalink / raw) To: Amarnath Valluri, qemu-devel On 05/16/2017 03:58 AM, Amarnath Valluri wrote: > Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com> ^ permalink raw reply [flat|nested] 24+ messages in thread
* [Qemu-devel] [PATCH v4 8/8] tpm: Added support for TPM emulator 2017-05-16 7:58 [Qemu-devel] [PATCH v4 0/8] Provide support for the software TPM emulator Amarnath Valluri ` (6 preceding siblings ...) 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 7/8] tpm-passthrough: move reusable code to utils Amarnath Valluri @ 2017-05-16 7:58 ` Amarnath Valluri 2017-05-24 15:15 ` Stefan Berger 2017-05-22 12:40 ` [Qemu-devel] [PATCH v4 0/8] Provide support for the software " Valluri, Amarnath 8 siblings, 1 reply; 24+ messages in thread From: Amarnath Valluri @ 2017-05-16 7:58 UTC (permalink / raw) To: qemu-devel; +Cc: Amarnath Valluri This change introduces a new TPM backend driver that can communicate with swtpm(software TPM emulator) using unix domain socket interface. Swtpm uses two unix sockets, one for plain TPM commands and responses, and one for out-of-band control messages. The swtpm and associated tools can be found here: https://github.com/stefanberger/swtpm The swtpm's control channel protocol specification can be found here: https://github.com/stefanberger/swtpm/wiki/Control-Channel-Specification Usage: # setup TPM state directory mkdir /tmp/mytpm chown -R tss:root /tmp/mytpm /usr/bin/swtpm_setup --tpm-state /tmp/mytpm --createek # Ask qemu to use TPM emulator with given tpm state directory qemu-system-x86_64 \ [...] \ -tpmdev emulator,id=tpm0,tpmstatedir=/tmp/mytpm,logfile=/tmp/swtpm.log \ -device tpm-tis,tpmdev=tpm0 \ [...] Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> --- configure | 15 +- hmp.c | 21 ++ hw/tpm/Makefile.objs | 1 + hw/tpm/tpm_emulator.c | 950 ++++++++++++++++++++++++++++++++++++++++++++++++++ hw/tpm/tpm_ioctl.h | 243 +++++++++++++ qapi-schema.json | 41 ++- qemu-options.hx | 53 ++- tpm.c | 2 +- 8 files changed, 1316 insertions(+), 10 deletions(-) create mode 100644 hw/tpm/tpm_emulator.c create mode 100644 hw/tpm/tpm_ioctl.h diff --git a/configure b/configure index 39e727e..b010bfb 100755 --- a/configure +++ b/configure @@ -3404,10 +3404,15 @@ fi ########################################## # TPM passthrough is only on x86 Linux -if test "$targetos" = Linux && test "$cpu" = i386 -o "$cpu" = x86_64; then - tpm_passthrough=$tpm +if test "$targetos" = Linux; then + tpm_emulator=$tpm + if test "$cpu" = i386 -o "$cpu" = x86_64; then + tpm_passthrough=$tpm + else + tpm_passthrough=no + fi else - tpm_passthrough=no + tpm_emulator=no fi ########################################## @@ -5214,6 +5219,7 @@ echo "gcov enabled $gcov" echo "TPM support $tpm" echo "libssh2 support $libssh2" echo "TPM passthrough $tpm_passthrough" +echo "TPM emulator $tpm_emulator" echo "QOM debugging $qom_cast_debug" echo "lzo support $lzo" echo "snappy support $snappy" @@ -5794,6 +5800,9 @@ if test "$tpm" = "yes"; then if test "$tpm_passthrough" = "yes"; then echo "CONFIG_TPM_PASSTHROUGH=y" >> $config_host_mak fi + if test "$tpm_emulator" = "yes"; then + echo "CONFIG_TPM_EMULATOR=y" >> $config_host_mak + fi fi echo "TRACE_BACKENDS=$trace_backends" >> $config_host_mak diff --git a/hmp.c b/hmp.c index 9338938..073faef 100644 --- a/hmp.c +++ b/hmp.c @@ -938,6 +938,7 @@ void hmp_info_tpm(Monitor *mon, const QDict *qdict) Error *err = NULL; unsigned int c = 0; TPMPassthroughOptions *tpo; + TPMEmulatorOptions *teo; info_list = qmp_query_tpm(&err); if (err) { @@ -967,6 +968,26 @@ void hmp_info_tpm(Monitor *mon, const QDict *qdict) tpo->has_cancel_path ? ",cancel-path=" : "", tpo->has_cancel_path ? tpo->cancel_path : ""); break; + case TPM_TYPE_EMULATOR: + teo = ti->options->u.emulator.data; + monitor_printf(mon, ",tmpstatedir=%s", teo->tpmstatedir); + monitor_printf(mon, ",spawn=%s", teo->spawn ? "on" : "off"); + if (teo->has_path) { + monitor_printf(mon, ",path=%s", teo->path); + } + if (teo->has_data_path) { + monitor_printf(mon, ",data-path=%s", teo->data_path); + } + if (teo->has_ctrl_path) { + monitor_printf(mon, ",ctrl-path=%s", teo->ctrl_path); + } + if (teo->has_logfile) { + monitor_printf(mon, ",logfile=%s", teo->logfile); + } + if (teo->has_loglevel) { + monitor_printf(mon, ",loglevel=%u", teo->loglevel); + } + break; default: break; } diff --git a/hw/tpm/Makefile.objs b/hw/tpm/Makefile.objs index 64cecc3..41f0b7a 100644 --- a/hw/tpm/Makefile.objs +++ b/hw/tpm/Makefile.objs @@ -1,2 +1,3 @@ common-obj-$(CONFIG_TPM_TIS) += tpm_tis.o common-obj-$(CONFIG_TPM_PASSTHROUGH) += tpm_passthrough.o tpm_util.o +common-obj-$(CONFIG_TPM_EMULATOR) += tpm_emulator.o tpm_util.o diff --git a/hw/tpm/tpm_emulator.c b/hw/tpm/tpm_emulator.c new file mode 100644 index 0000000..2ad63be --- /dev/null +++ b/hw/tpm/tpm_emulator.c @@ -0,0 +1,950 @@ +/* + * emulator TPM driver + * + * Copyright (c) 2017 Intel Corporation + * Author: Amarnath Valluri <amarnath.valluri@intel.com> + * + * Copyright (c) 2010 - 2013 IBM Corporation + * Authors: + * Stefan Berger <stefanb@us.ibm.com> + * + * Copyright (C) 2011 IAIK, Graz University of Technology + * Author: Andreas Niederl + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see <http://www.gnu.org/licenses/> + * + */ + +#include "qemu/osdep.h" +#include "qemu/error-report.h" +#include "qemu/sockets.h" +#include "io/channel-socket.h" +#include "sysemu/tpm_backend.h" +#include "tpm_int.h" +#include "hw/hw.h" +#include "hw/i386/pc.h" +#include "tpm_util.h" +#include "tpm_ioctl.h" +#include "qapi/error.h" + +#include <fcntl.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <stdio.h> + +#define DEBUG_TPM 0 + +#define DPRINT(fmt, ...) do { \ + if (DEBUG_TPM) { \ + fprintf(stderr, fmt, ## __VA_ARGS__); \ + } \ +} while (0); + +#define DPRINTF(fmt, ...) DPRINT("tpm-emulator: "fmt"\n", __VA_ARGS__) + +#define TYPE_TPM_EMULATOR "tpm-emulator" +#define TPM_EMULATOR(obj) \ + OBJECT_CHECK(TPMEmulator, (obj), TYPE_TPM_EMULATOR) + +static const TPMDriverOps tpm_emulator_driver; + +/* data structures */ +typedef struct TPMEmulator { + TPMBackend parent; + + TPMEmulatorOptions *ops; + QIOChannel *data_ioc; + QIOChannel *ctrl_ioc; + bool op_executing; + bool op_canceled; + bool child_running; + TPMVersion tpm_version; + ptm_cap caps; /* capabilities of the TPM */ + uint8_t cur_locty_number; /* last set locality */ + QemuMutex state_lock; +} TPMEmulator; + +#define TPM_DEFAULT_EMULATOR "swtpm" +#define TPM_DEFAULT_LOGLEVEL 5 +#define TPM_EMULATOR_PIDFILE "/tmp/qemu-tpm.pid" +#define TPM_EMULATOR_IMPLEMENTS_ALL_CAPS(S, cap) (((S)->caps & (cap)) == (cap)) + +static int tpm_emulator_ctrlcmd(QIOChannel *ioc, unsigned long cmd, void *msg, + size_t msg_len_in, size_t msg_len_out) +{ + ssize_t n; + + uint32_t cmd_no = cpu_to_be32(cmd); + struct iovec iov[2] = { + { .iov_base = &cmd_no, .iov_len = sizeof(cmd_no), }, + { .iov_base = msg, .iov_len = msg_len_in, }, + }; + + n = qio_channel_writev(ioc, iov, 2, NULL); + if (n > 0) { + if (msg_len_out > 0) { + n = qio_channel_read(ioc, (char *)msg, msg_len_out, NULL); + /* simulate ioctl return value */ + if (n > 0) { + n = 0; + } + } else { + n = 0; + } + } + return n; +} + +static int tpm_emulator_unix_tx_bufs(TPMEmulator *tpm_pt, + const uint8_t *in, uint32_t in_len, + uint8_t *out, uint32_t out_len, + bool *selftest_done) +{ + ssize_t ret; + bool is_selftest; + const struct tpm_resp_hdr *hdr; + + if (!tpm_pt->child_running) { + return -1; + } + + tpm_pt->op_canceled = false; + tpm_pt->op_executing = true; + *selftest_done = false; + + is_selftest = tpm_util_is_selftest(in, in_len); + + ret = qio_channel_write(tpm_pt->data_ioc, (const char *)in, (size_t)in_len, + NULL); + if (ret != in_len) { + if (!tpm_pt->op_canceled || errno != ECANCELED) { + error_report("tpm-emulator: error while transmitting data " + "to TPM: %s (%i)", strerror(errno), errno); + } + goto err_exit; + } + + tpm_pt->op_executing = false; + + ret = qio_channel_read(tpm_pt->data_ioc, (char *)out, (size_t)out_len, + NULL); + if (ret < 0) { + if (!tpm_pt->op_canceled || errno != ECANCELED) { + error_report("tpm-emulator: error while reading data from " + "TPM: %s (%i)", strerror(errno), errno); + } + } else if (ret < sizeof(struct tpm_resp_hdr) || + be32_to_cpu(((struct tpm_resp_hdr *)out)->len) != ret) { + ret = -1; + error_report("tpm-emulator: received invalid response " + "packet from TPM"); + } + + if (is_selftest && (ret >= sizeof(struct tpm_resp_hdr))) { + hdr = (struct tpm_resp_hdr *)out; + *selftest_done = (be32_to_cpu(hdr->errcode) == 0); + } + +err_exit: + if (ret < 0) { + tpm_util_write_fatal_error_response(out, out_len); + } + + tpm_pt->op_executing = false; + + return ret; +} + +static int tpm_emulator_set_locality(TPMEmulator *tpm_pt, + uint8_t locty_number) +{ + ptm_loc loc; + + if (!tpm_pt->child_running) { + return -1; + } + + DPRINTF("%s : locality: 0x%x", __func__, locty_number); + + if (tpm_pt->cur_locty_number != locty_number) { + DPRINTF("setting locality : 0x%x", locty_number); + loc.u.req.loc = locty_number; + if (tpm_emulator_ctrlcmd(tpm_pt->ctrl_ioc, CMD_SET_LOCALITY, &loc, + sizeof(loc), sizeof(loc)) < 0) { + error_report("tpm-emulator: could not set locality : %s", + strerror(errno)); + return -1; + } + loc.u.resp.tpm_result = be32_to_cpu(loc.u.resp.tpm_result); + if (loc.u.resp.tpm_result != 0) { + error_report("tpm-emulator: TPM result for set locality : 0x%x", + loc.u.resp.tpm_result); + return -1; + } + tpm_pt->cur_locty_number = locty_number; + } + return 0; +} + +static void tpm_emulator_handle_request(TPMBackend *tb, TPMBackendCmd cmd) +{ + TPMEmulator *tpm_pt = TPM_EMULATOR(tb); + TPMLocality *locty = NULL; + bool selftest_done = false; + + DPRINTF("processing command type %d", cmd); + + switch (cmd) { + case TPM_BACKEND_CMD_PROCESS_CMD: + qemu_mutex_lock(&tpm_pt->state_lock); + locty = tb->tpm_state->locty_data; + if (tpm_emulator_set_locality(tpm_pt, + tb->tpm_state->locty_number) < 0) { + tpm_util_write_fatal_error_response(locty->r_buffer.buffer, + locty->r_buffer.size); + } else { + tpm_emulator_unix_tx_bufs(tpm_pt, locty->w_buffer.buffer, + locty->w_offset, locty->r_buffer.buffer, + locty->r_buffer.size, &selftest_done); + } + tb->recv_data_callback(tb->tpm_state, tb->tpm_state->locty_number, + selftest_done); + qemu_mutex_unlock(&tpm_pt->state_lock); + break; + case TPM_BACKEND_CMD_INIT: + case TPM_BACKEND_CMD_END: + case TPM_BACKEND_CMD_TPM_RESET: + /* nothing to do */ + break; + } +} + +/* + * Gracefully shut down the external unixio TPM + */ +static void tpm_emulator_shutdown(TPMEmulator *tpm_pt) +{ + ptm_res res; + + if (!tpm_pt->child_running) { + return; + } + + if (tpm_emulator_ctrlcmd(tpm_pt->ctrl_ioc, CMD_SHUTDOWN, &res, 0, + sizeof(res)) < 0) { + error_report("tpm-emulator: Could not cleanly shutdown the TPM: %s", + strerror(errno)); + } else if (res != 0) { + error_report("tpm-emulator: TPM result for sutdown: 0x%x", + be32_to_cpu(res)); + } +} + +static int tpm_emulator_probe_caps(TPMEmulator *tpm_pt) +{ + if (!tpm_pt->child_running) { + return -1; + } + + DPRINTF("%s", __func__); + if (tpm_emulator_ctrlcmd(tpm_pt->ctrl_ioc, CMD_GET_CAPABILITY, + &tpm_pt->caps, 0, sizeof(tpm_pt->caps)) < 0) { + error_report("tpm-emulator: probing failed : %s", strerror(errno)); + return -1; + } + + tpm_pt->caps = be64_to_cpu(tpm_pt->caps); + + DPRINTF("capbilities : 0x%lx", tpm_pt->caps); + + return 0; +} + +static int tpm_emulator_check_caps(TPMEmulator *tpm_pt) +{ + ptm_cap caps = 0; + const char *tpm = NULL; + + /* check for min. required capabilities */ + switch (tpm_pt->tpm_version) { + case TPM_VERSION_1_2: + caps = PTM_CAP_INIT | PTM_CAP_SHUTDOWN | PTM_CAP_GET_TPMESTABLISHED | + PTM_CAP_SET_LOCALITY; + tpm = "1.2"; + break; + case TPM_VERSION_2_0: + caps = PTM_CAP_INIT | PTM_CAP_SHUTDOWN | PTM_CAP_GET_TPMESTABLISHED | + PTM_CAP_SET_LOCALITY | PTM_CAP_RESET_TPMESTABLISHED; + tpm = "2"; + break; + case TPM_VERSION_UNSPEC: + error_report("tpm-emulator: TPM version has not been set"); + return -1; + } + + if (!TPM_EMULATOR_IMPLEMENTS_ALL_CAPS(tpm_pt, caps)) { + error_report("tpm-emulator: TPM does not implement minimum set of " + "required capabilities for TPM %s (0x%x)", tpm, (int)caps); + return -1; + } + + return 0; +} + +static int tpm_emulator_init_tpm(TPMEmulator *tpm_pt) +{ + ptm_init init; + ptm_res res; + + if (!tpm_pt->child_running) { + return -1; + } + + DPRINTF("%s", __func__); + if (tpm_emulator_ctrlcmd(tpm_pt->ctrl_ioc, CMD_INIT, &init, sizeof(init), + sizeof(init)) < 0) { + error_report("tpm-emulator: could not send INIT: %s", + strerror(errno)); + return -1; + } + + res = be32_to_cpu(init.u.resp.tpm_result); + if (res) { + error_report("tpm-emulator: TPM result for CMD_INIT: 0x%x", res); + return -1; + } + + return 0; +} + +static int tpm_emulator_startup_tpm(TPMBackend *tb) +{ + TPMEmulator *tpm_pt = TPM_EMULATOR(tb); + + DPRINTF("%s", __func__); + + tpm_emulator_init_tpm(tpm_pt) ; + + return 0; +} + +static bool tpm_emulator_get_tpm_established_flag(TPMBackend *tb) +{ + TPMEmulator *tpm_pt = TPM_EMULATOR(tb); + ptm_est est; + + DPRINTF("%s", __func__); + if (tpm_emulator_ctrlcmd(tpm_pt->ctrl_ioc, CMD_GET_TPMESTABLISHED, &est, 0, + sizeof(est)) < 0) { + error_report("tpm-emulator: Could not get the TPM established flag: %s", + strerror(errno)); + return false; + } + DPRINTF("established flag: %0x", est.u.resp.bit); + + return (est.u.resp.bit != 0); +} + +static int tpm_emulator_reset_tpm_established_flag(TPMBackend *tb, + uint8_t locty) +{ + TPMEmulator *tpm_pt = TPM_EMULATOR(tb); + ptm_reset_est reset_est; + ptm_res res; + + /* only a TPM 2.0 will support this */ + if (tpm_pt->tpm_version == TPM_VERSION_2_0) { + reset_est.u.req.loc = tpm_pt->cur_locty_number; + + if (tpm_emulator_ctrlcmd(tpm_pt->ctrl_ioc, CMD_RESET_TPMESTABLISHED, + &reset_est, sizeof(reset_est), + sizeof(reset_est)) < 0) { + error_report("tpm-emulator: Could not reset the establishment bit: " + "%s", strerror(errno)); + return -1; + } + + res = be32_to_cpu(reset_est.u.resp.tpm_result); + if (res) { + error_report("tpm-emulator: TPM result for rest establixhed flag: " + "0x%x", res); + return -1; + } + } + + return 0; +} + +static bool tpm_emulator_had_startup_error(TPMBackend *tb) +{ + TPMEmulator *tpm_pt = TPM_EMULATOR(tb); + + return !tpm_pt->child_running; +} + +static void tpm_emulator_cancel_cmd(TPMBackend *tb) +{ + TPMEmulator *tpm_pt = TPM_EMULATOR(tb); + ptm_res res; + + /* + * As of Linux 3.7 the tpm_tis driver does not properly cancel + * commands on all TPM manufacturers' TPMs. + * Only cancel if we're busy so we don't cancel someone else's + * command, e.g., a command executed on the host. + */ + if (tpm_pt->op_executing) { + if (TPM_EMULATOR_IMPLEMENTS_ALL_CAPS(tpm_pt, PTM_CAP_CANCEL_TPM_CMD)) { + if (tpm_emulator_ctrlcmd(tpm_pt->ctrl_ioc, CMD_CANCEL_TPM_CMD, &res, + 0, sizeof(res)) < 0) { + error_report("tpm-emulator: Could not cancel command: %s", + strerror(errno)); + } else if (res != 0) { + error_report("tpm-emulator: Failed to cancel TPM: 0x%x", + be32_to_cpu(res)); + } else { + tpm_pt->op_canceled = true; + } + } + } +} + +static void tpm_emulator_reset(TPMBackend *tb) +{ + DPRINTF("%s", __func__); + + tpm_emulator_cancel_cmd(tb); +} + +static TPMVersion tpm_emulator_get_tpm_version(TPMBackend *tb) +{ + TPMEmulator *tpm_pt = TPM_EMULATOR(tb); + + return tpm_pt->tpm_version; +} + +static gboolean tpm_emulator_fd_handler(QIOChannel *ioc, GIOCondition cnd, + void *opaque) +{ + TPMEmulator *tpm_pt = opaque; + + if (cnd & G_IO_ERR || cnd & G_IO_HUP) { + error_report("TPM backend disappeared"); + tpm_pt->child_running = false; + return false; + } + + return true; +} + +static QIOChannel *_iochannel_new(const char *path, int fd, Error **err) +{ + int socket = path ? unix_connect(path, err) : fd; + if (socket < 0) { + return NULL; + } + + return QIO_CHANNEL(qio_channel_socket_new_fd(socket, err)); +} + +static int tpm_emulator_spawn_emulator(TPMEmulator *tpm_pt) +{ + int fds[2] = { -1, -1 }; + int ctrl_fds[2] = { -1, -1 }; + pid_t cpid; + + if (!tpm_pt->ops->has_data_path) { + if (socketpair(AF_UNIX, SOCK_SEQPACKET, 0, fds) < 0) { + return -1; + } + } + + if (!tpm_pt->ops->has_ctrl_path) { + if (socketpair(AF_UNIX, SOCK_SEQPACKET, 0, ctrl_fds) < 0) { + if (!tpm_pt->ops->has_data_path) { + closesocket(fds[0]); + closesocket(fds[1]); + } + return -1; + } + } + + cpid = qemu_fork(NULL); + if (cpid < 0) { + error_report("tpm-emulator: Fork failure: %s", strerror(errno)); + if (!tpm_pt->ops->has_data_path) { + closesocket(fds[0]); + closesocket(fds[1]); + } + if (!tpm_pt->ops->has_ctrl_path) { + closesocket(ctrl_fds[0]); + closesocket(ctrl_fds[1]); + } + return -1; + } + + unlink(TPM_EMULATOR_PIDFILE); + + if (cpid == 0) { /* CHILD */ + enum { + PARAM_PATH, + PARAM_IFACE, + PARAM_SERVER, PARAM_SERVER_ARGS, + PARAM_CTRL, PARAM_CTRL_ARGS, + PARAM_STATE, PARAM_STATE_ARGS, + PARAM_PIDFILE, PARAM_PIDFILE_ARGS, + PARAM_LOG, PARAM_LOG_ARGS, + PARAM_MAX + }; + + int i; + int data_fd = -1, ctrl_fd = -1; + char *argv[PARAM_MAX + 1]; + + /* close all unused inherited sockets */ + if (fds[0] >= 0) { + closesocket(fds[0]); + } + if (ctrl_fds[0] >= 0) { + closesocket(ctrl_fds[0]); + } + + i = STDERR_FILENO + 1; + if (fds[1] >= 0) { + data_fd = dup2(fds[1], i++); + if (data_fd < 0) { + error_report("tpm-emulator: dup2() failure - %s", + strerror(errno)); + goto exit_child; + } + } + if (ctrl_fds[1] >= 0) { + ctrl_fd = dup2(ctrl_fds[1], i++); + if (ctrl_fd < 0) { + error_report("tpm-emulator: dup2() failure - %s", + strerror(errno)); + goto exit_child; + } + } + for ( ; i < sysconf(_SC_OPEN_MAX); i++) { + close(i); + } + + argv[PARAM_MAX] = NULL; + argv[PARAM_PATH] = g_strdup(tpm_pt->ops->path); + argv[PARAM_IFACE] = g_strdup("socket"); + if (tpm_pt->ops->has_data_path) { + argv[PARAM_SERVER] = g_strdup("--server"); + argv[PARAM_SERVER_ARGS] = g_strdup_printf("type=unixio,path=%s", + tpm_pt->ops->data_path); + } else { + argv[PARAM_SERVER] = g_strdup("--fd"); + argv[PARAM_SERVER_ARGS] = g_strdup_printf("%d", data_fd); + } + + argv[PARAM_CTRL] = g_strdup("--ctrl"); + if (tpm_pt->ops->has_ctrl_path) { + argv[PARAM_CTRL_ARGS] = g_strdup_printf("type=unixio,path=%s", + tpm_pt->ops->ctrl_path); + } else { + argv[PARAM_CTRL_ARGS] = g_strdup_printf("type=unixio,clientfd=%d", + ctrl_fd); + } + + argv[PARAM_STATE] = g_strdup("--tpmstate"); + argv[PARAM_STATE_ARGS] = g_strdup_printf("dir=%s", + tpm_pt->ops->tpmstatedir); + argv[PARAM_PIDFILE] = g_strdup("--pid"); + argv[PARAM_PIDFILE_ARGS] = g_strdup_printf("file=%s", + TPM_EMULATOR_PIDFILE); + if (tpm_pt->ops->has_logfile) { + argv[PARAM_LOG] = g_strdup("--log"); + argv[PARAM_LOG_ARGS] = g_strdup_printf("file=%s,level=%d", + tpm_pt->ops->logfile, (int)tpm_pt->ops->loglevel); + } else { + /* truncate logs */ + argv[PARAM_LOG] = NULL; + } + DPRINTF("%s", "Running cmd: ") + for (i = 0; argv[i]; i++) { + DPRINT(" %s", argv[i]) + } + DPRINT("\n") + if (execv(tpm_pt->ops->path, (char * const *)argv) < 0) { + error_report("execv() failure : %s", strerror(errno)); + } + +exit_child: + g_strfreev(argv); + if (data_fd >= 0) { + closesocket(data_fd); + } + if (ctrl_fd >= 0) { + closesocket(ctrl_fd); + } + + _exit(1); + } else { /* self */ + struct stat st; + DPRINTF("child pid: %d", cpid); + int rc; + useconds_t usec = 100 * 1000L; /* wait for 100 milliseconds */ + useconds_t timeout = 10; /* max 1 second */ + + /* close unused sockets */ + if (fds[1] >= 0) { + closesocket(fds[1]); + } + if (ctrl_fds[1] >= 0) { + closesocket(ctrl_fds[1]); + } + + tpm_pt->data_ioc = _iochannel_new(tpm_pt->ops->data_path, fds[0], NULL); + if (!tpm_pt->data_ioc) { + error_report("tpm-emulator: Unable to connect socket : %s", + tpm_pt->ops->data_path); + goto err_kill_child; + } + + tpm_pt->ctrl_ioc = _iochannel_new(tpm_pt->ops->ctrl_path, ctrl_fds[0], + NULL); + if (!tpm_pt->ctrl_ioc) { + error_report("tpm-emulator: Unable to connect socket : %s", + tpm_pt->ops->ctrl_path); + goto err_kill_child; + } + + qemu_add_child_watch(cpid); + + qio_channel_add_watch(tpm_pt->data_ioc, G_IO_HUP | G_IO_ERR, + tpm_emulator_fd_handler, tpm_pt, NULL); + + while ((rc = stat(TPM_EMULATOR_PIDFILE, &st)) < 0 && timeout--) { + usleep(usec); + } + + if (timeout == -1) { + error_report("tpm-emulator: pid file not ready: %s", + strerror(errno)); + goto err_kill_child; + } + + /* check if child really running */ + if (kill(cpid, 0) < 0 && errno == ESRCH) { + goto err_no_child; + } + + tpm_pt->child_running = true; + } + + return 0; + +err_kill_child: + kill(cpid, SIGTERM); + /* wait for 10 mill-seconds */ + usleep(10 * 1000); + /* force kill if still reachable */ + if (kill(cpid, 0) == 0) { + kill(cpid, SIGKILL); + } + +err_no_child: + tpm_pt->child_running = false; + + return -1; +} + +static int tpm_emulator_handle_device_opts(TPMEmulator *tpm_pt, QemuOpts *opts) +{ + const char *value; + + value = qemu_opt_get(opts, "tpmstatedir"); + if (!value) { + error_report("tpm-emulator: Missing tpm state directory"); + return -1; + } + tpm_pt->ops->tpmstatedir = g_strdup(value); + + tpm_pt->ops->spawn = qemu_opt_get_bool(opts, "spawn", false); + + value = qemu_opt_get(opts, "path"); + if (!value) { + value = TPM_DEFAULT_EMULATOR; + tpm_pt->ops->has_path = false; + } else { + tpm_pt->ops->has_path = true; + if (value[0] == '/') { + struct stat st; + if (stat(value, &st) < 0 || !(S_ISREG(st.st_mode) + || S_ISLNK(st.st_mode))) { + error_report("tpm-emulator: Invalid emulator path: %s", value); + return -1; + } + } + } + tpm_pt->ops->path = g_strdup(value); + + value = qemu_opt_get(opts, "data-path"); + if (value) { + tpm_pt->ops->has_data_path = true; + tpm_pt->ops->data_path = g_strdup(value); + } else { + tpm_pt->ops->has_data_path = false; + if (!tpm_pt->ops->spawn) { + error_report("tpm-emulator: missing mandatory data-path"); + return -1; + } + } + + value = qemu_opt_get(opts, "ctrl-path"); + if (value) { + tpm_pt->ops->has_ctrl_path = true; + tpm_pt->ops->ctrl_path = g_strdup(value); + } else { + tpm_pt->ops->has_ctrl_path = false; + if (!tpm_pt->ops->spawn) { + error_report("tpm-emulator: missing mandatory ctrl-path"); + return -1; + } + } + + value = qemu_opt_get(opts, "logfile"); + if (value) { + tpm_pt->ops->has_logfile = true; + tpm_pt->ops->logfile = g_strdup(value); + tpm_pt->ops->loglevel = qemu_opt_get_number(opts, "loglevel", + TPM_DEFAULT_LOGLEVEL); + tpm_pt->ops->has_loglevel = tpm_pt->ops->loglevel != + TPM_DEFAULT_LOGLEVEL; + } + + if (tpm_pt->ops->spawn) { + if (tpm_emulator_spawn_emulator(tpm_pt) < 0) { + goto err_close_dev; + } + } else { + tpm_pt->data_ioc = _iochannel_new(tpm_pt->ops->data_path, -1, NULL); + if (tpm_pt->data_ioc == NULL) { + error_report("tpm-emulator: Failed to connect data socket: %s", + tpm_pt->ops->data_path); + goto err_close_dev; + } + tpm_pt->ctrl_ioc = _iochannel_new(tpm_pt->ops->ctrl_path, -1, NULL); + if (tpm_pt->ctrl_ioc == NULL) { + DPRINTF("Failed to connect control socket: %s", + strerror(errno)); + goto err_close_dev; + } + tpm_pt->child_running = true; + } + + /* FIXME: tpm_util_test_tpmdev() accepts only on socket fd, as it also used + * by passthrough driver, which not yet using GIOChannel. + */ + if (tpm_util_test_tpmdev(QIO_CHANNEL_SOCKET(tpm_pt->data_ioc)->fd, + &tpm_pt->tpm_version)) { + error_report("'%s' is not emulating TPM device.", tpm_pt->ops->path); + goto err_close_dev; + } + + DPRINTF("TPM Version %s", tpm_pt->tpm_version == TPM_VERSION_1_2 ? "1.2" : + (tpm_pt->tpm_version == TPM_VERSION_2_0 ? "2.0" : "Unspecified")); + + if (tpm_emulator_probe_caps(tpm_pt) || + tpm_emulator_check_caps(tpm_pt)) { + goto err_close_dev; + } + + return 0; + +err_close_dev: + DPRINT("Startup error\n"); + return -1; +} + +static TPMBackend *tpm_emulator_create(QemuOpts *opts, const char *id) +{ + TPMBackend *tb = TPM_BACKEND(object_new(TYPE_TPM_EMULATOR)); + + tb->id = g_strdup(id); + + if (tpm_emulator_handle_device_opts(TPM_EMULATOR(tb), opts)) { + goto err_exit; + } + + return tb; + +err_exit: + object_unref(OBJECT(tb)); + + return NULL; +} + +static TpmTypeOptions *tpm_emulator_get_tpm_options(TPMBackend *tb) +{ + TPMEmulator *tpm_pt = TPM_EMULATOR(tb); + TpmTypeOptions *ops = NULL; + TPMEmulatorOptions *eops = NULL; + + eops = g_new0(TPMEmulatorOptions, 1); + if (!eops) { + return NULL; + } + DPRINTF("%s", __func__); + + eops->tpmstatedir = g_strdup(tpm_pt->ops->tpmstatedir); + eops->spawn = tpm_pt->ops->spawn; + if (tpm_pt->ops->has_path) { + eops->has_path = true; + eops->path = g_strdup(tpm_pt->ops->path); + } + if (tpm_pt->ops->has_data_path) { + eops->has_data_path = true; + eops->data_path = g_strdup(tpm_pt->ops->data_path); + } + if (tpm_pt->ops->has_ctrl_path) { + eops->has_ctrl_path = true; + eops->ctrl_path = g_strdup(tpm_pt->ops->ctrl_path); + } + if (tpm_pt->ops->has_logfile) { + eops->has_logfile = true; + eops->logfile = g_strdup(tpm_pt->ops->logfile); + } + if (tpm_pt->ops->has_loglevel) { + eops->has_loglevel = true; + eops->loglevel = tpm_pt->ops->loglevel; + } + + ops = g_new0(TpmTypeOptions, 1); + if (!ops) { + qapi_free_TPMEmulatorOptions(eops); + return NULL; + } + + ops->type = TPM_TYPE_EMULATOR; + ops->u.emulator.data = eops; + + return ops; +} + +static const QemuOptDesc tpm_emulator_cmdline_opts[] = { + TPM_STANDARD_CMDLINE_OPTS, + { + .name = "tpmstatedir", + .type = QEMU_OPT_STRING, + .help = "TPM state directroy", + }, + { + .name = "spawn", + .type = QEMU_OPT_BOOL, + .help = "Wether to spwan given emlatory binary", + }, + { + .name = "path", + .type = QEMU_OPT_STRING, + .help = "Path to TPM emulator binary", + }, + { + .name = "data-path", + .type = QEMU_OPT_STRING, + .help = "Socket path to use for data exhange", + }, + { + .name = "ctrl-path", + .type = QEMU_OPT_STRING, + .help = "Socket path to use for out-of-band control messages", + }, + { + .name = "logfile", + .type = QEMU_OPT_STRING, + .help = "Path to log file", + }, + { + .name = "loglevel", + .type = QEMU_OPT_NUMBER, + .help = "Log level number", + }, + { /* end of list */ }, +}; + +static const TPMDriverOps tpm_emulator_driver = { + .type = TPM_TYPE_EMULATOR, + .opts = tpm_emulator_cmdline_opts, + .desc = "TPM emulator backend driver", + + .create = tpm_emulator_create, + .startup_tpm = tpm_emulator_startup_tpm, + .reset = tpm_emulator_reset, + .had_startup_error = tpm_emulator_had_startup_error, + .cancel_cmd = tpm_emulator_cancel_cmd, + .get_tpm_established_flag = tpm_emulator_get_tpm_established_flag, + .reset_tpm_established_flag = tpm_emulator_reset_tpm_established_flag, + .get_tpm_version = tpm_emulator_get_tpm_version, + .get_tpm_options = tpm_emulator_get_tpm_options, +}; + +static void tpm_emulator_inst_init(Object *obj) +{ + TPMEmulator *tpm_pt = TPM_EMULATOR(obj); + + DPRINTF("%s", __func__); + tpm_pt->ops = g_new0(TPMEmulatorOptions, 1); + tpm_pt->data_ioc = tpm_pt->ctrl_ioc = NULL; + tpm_pt->op_executing = tpm_pt->op_canceled = false; + tpm_pt->child_running = false; + tpm_pt->cur_locty_number = ~0; + qemu_mutex_init(&tpm_pt->state_lock); +} + +static void tpm_emulator_inst_finalize(Object *obj) +{ + TPMEmulator *tpm_pt = TPM_EMULATOR(obj); + + tpm_emulator_cancel_cmd(TPM_BACKEND(obj)); + tpm_emulator_shutdown(tpm_pt); + + if (tpm_pt->data_ioc) { + qio_channel_close(tpm_pt->data_ioc, NULL); + } + if (tpm_pt->ctrl_ioc) { + qio_channel_close(tpm_pt->ctrl_ioc, NULL); + } + if (tpm_pt->ops) { + qapi_free_TPMEmulatorOptions(tpm_pt->ops); + } +} + +static void tpm_emulator_class_init(ObjectClass *klass, void *data) +{ + TPMBackendClass *tbc = TPM_BACKEND_CLASS(klass); + tbc->ops = &tpm_emulator_driver; + tbc->handle_request = tpm_emulator_handle_request; +} + +static const TypeInfo tpm_emulator_info = { + .name = TYPE_TPM_EMULATOR, + .parent = TYPE_TPM_BACKEND, + .instance_size = sizeof(TPMEmulator), + .class_init = tpm_emulator_class_init, + .instance_init = tpm_emulator_inst_init, + .instance_finalize = tpm_emulator_inst_finalize, +}; + +static void tpm_emulator_register(void) +{ + type_register_static(&tpm_emulator_info); + tpm_register_driver(&tpm_emulator_driver); +} + +type_init(tpm_emulator_register) diff --git a/hw/tpm/tpm_ioctl.h b/hw/tpm/tpm_ioctl.h new file mode 100644 index 0000000..af49708 --- /dev/null +++ b/hw/tpm/tpm_ioctl.h @@ -0,0 +1,243 @@ +/* + * tpm_ioctl.h + * + * (c) Copyright IBM Corporation 2014, 2015. + * + * This file is licensed under the terms of the 3-clause BSD license + */ +#ifndef _TPM_IOCTL_H_ +#define _TPM_IOCTL_H_ + +#include <stdint.h> +#include <sys/uio.h> +#include <sys/types.h> +#include <sys/ioctl.h> + +/* + * Every response from a command involving a TPM command execution must hold + * the ptm_res as the first element. + * ptm_res corresponds to the error code of a command executed by the TPM. + */ + +typedef uint32_t ptm_res; + +/* PTM_GET_TPMESTABLISHED: get the establishment bit */ +struct ptm_est { + union { + struct { + ptm_res tpm_result; + unsigned char bit; /* TPM established bit */ + } resp; /* response */ + } u; +}; + +/* PTM_RESET_TPMESTABLISHED: reset establishment bit */ +struct ptm_reset_est { + union { + struct { + uint8_t loc; /* locality to use */ + } req; /* request */ + struct { + ptm_res tpm_result; + } resp; /* response */ + } u; +}; + +/* PTM_INIT */ +struct ptm_init { + union { + struct { + uint32_t init_flags; /* see definitions below */ + } req; /* request */ + struct { + ptm_res tpm_result; + } resp; /* response */ + } u; +}; + +/* above init_flags */ +#define PTM_INIT_FLAG_DELETE_VOLATILE (1 << 0) + /* delete volatile state file after reading it */ + +/* PTM_SET_LOCALITY */ +struct ptm_loc { + union { + struct { + uint8_t loc; /* locality to set */ + } req; /* request */ + struct { + ptm_res tpm_result; + } resp; /* response */ + } u; +}; + +/* PTM_HASH_DATA: hash given data */ +struct ptm_hdata { + union { + struct { + uint32_t length; + uint8_t data[4096]; + } req; /* request */ + struct { + ptm_res tpm_result; + } resp; /* response */ + } u; +}; + +/* + * size of the TPM state blob to transfer; x86_64 can handle 8k, + * ppc64le only ~7k; keep the response below a 4k page size + */ +#define PTM_STATE_BLOB_SIZE (3 * 1024) + +/* + * The following is the data structure to get state blobs from the TPM. + * If the size of the state blob exceeds the PTM_STATE_BLOB_SIZE, multiple reads + * with this ioctl and with adjusted offset are necessary. All bytes + * must be transferred and the transfer is done once the last byte has been + * returned. + * It is possible to use the read() interface for reading the data; however, the + * first bytes of the state blob will be part of the response to the ioctl(); a + * subsequent read() is only necessary if the total length (totlength) exceeds + * the number of received bytes. seek() is not supported. + */ +struct ptm_getstate { + union { + struct { + uint32_t state_flags; /* may be: PTM_STATE_FLAG_DECRYPTED */ + uint32_t type; /* which blob to pull */ + uint32_t offset; /* offset from where to read */ + } req; /* request */ + struct { + ptm_res tpm_result; + uint32_t state_flags; /* may be: PTM_STATE_FLAG_ENCRYPTED */ + uint32_t totlength; /* total length that will be transferred */ + uint32_t length; /* number of bytes in following buffer */ + uint8_t data[PTM_STATE_BLOB_SIZE]; + } resp; /* response */ + } u; +}; + +/* TPM state blob types */ +#define PTM_BLOB_TYPE_PERMANENT 1 +#define PTM_BLOB_TYPE_VOLATILE 2 +#define PTM_BLOB_TYPE_SAVESTATE 3 + +/* state_flags above : */ +#define PTM_STATE_FLAG_DECRYPTED 1 /* on input: get decrypted state */ +#define PTM_STATE_FLAG_ENCRYPTED 2 /* on output: state is encrypted */ + +/* + * The following is the data structure to set state blobs in the TPM. + * If the size of the state blob exceeds the PTM_STATE_BLOB_SIZE, multiple + * 'writes' using this ioctl are necessary. The last packet is indicated + * by the length being smaller than the PTM_STATE_BLOB_SIZE. + * The very first packet may have a length indicator of '0' enabling + * a write() with all the bytes from a buffer. If the write() interface + * is used, a final ioctl with a non-full buffer must be made to indicate + * that all data were transferred (a write with 0 bytes would not work). + */ +struct ptm_setstate { + union { + struct { + uint32_t state_flags; /* may be PTM_STATE_FLAG_ENCRYPTED */ + uint32_t type; /* which blob to set */ + uint32_t length; /* length of the data; + use 0 on the first packet to + transfer using write() */ + uint8_t data[PTM_STATE_BLOB_SIZE]; + } req; /* request */ + struct { + ptm_res tpm_result; + } resp; /* response */ + } u; +}; + +/* + * PTM_GET_CONFIG: Data structure to get runtime configuration information + * such as which keys are applied. + */ +struct ptm_getconfig { + union { + struct { + ptm_res tpm_result; + uint32_t flags; + } resp; /* response */ + } u; +}; + +#define PTM_CONFIG_FLAG_FILE_KEY 0x1 +#define PTM_CONFIG_FLAG_MIGRATION_KEY 0x2 + + +typedef uint64_t ptm_cap; +typedef struct ptm_est ptm_est; +typedef struct ptm_reset_est ptm_reset_est; +typedef struct ptm_loc ptm_loc; +typedef struct ptm_hdata ptm_hdata; +typedef struct ptm_init ptm_init; +typedef struct ptm_getstate ptm_getstate; +typedef struct ptm_setstate ptm_setstate; +typedef struct ptm_getconfig ptm_getconfig; + +/* capability flags returned by PTM_GET_CAPABILITY */ +#define PTM_CAP_INIT (1) +#define PTM_CAP_SHUTDOWN (1 << 1) +#define PTM_CAP_GET_TPMESTABLISHED (1 << 2) +#define PTM_CAP_SET_LOCALITY (1 << 3) +#define PTM_CAP_HASHING (1 << 4) +#define PTM_CAP_CANCEL_TPM_CMD (1 << 5) +#define PTM_CAP_STORE_VOLATILE (1 << 6) +#define PTM_CAP_RESET_TPMESTABLISHED (1 << 7) +#define PTM_CAP_GET_STATEBLOB (1 << 8) +#define PTM_CAP_SET_STATEBLOB (1 << 9) +#define PTM_CAP_STOP (1 << 10) +#define PTM_CAP_GET_CONFIG (1 << 11) + +enum { + PTM_GET_CAPABILITY = _IOR('P', 0, ptm_cap), + PTM_INIT = _IOWR('P', 1, ptm_init), + PTM_SHUTDOWN = _IOR('P', 2, ptm_res), + PTM_GET_TPMESTABLISHED = _IOR('P', 3, ptm_est), + PTM_SET_LOCALITY = _IOWR('P', 4, ptm_loc), + PTM_HASH_START = _IOR('P', 5, ptm_res), + PTM_HASH_DATA = _IOWR('P', 6, ptm_hdata), + PTM_HASH_END = _IOR('P', 7, ptm_res), + PTM_CANCEL_TPM_CMD = _IOR('P', 8, ptm_res), + PTM_STORE_VOLATILE = _IOR('P', 9, ptm_res), + PTM_RESET_TPMESTABLISHED = _IOWR('P', 10, ptm_reset_est), + PTM_GET_STATEBLOB = _IOWR('P', 11, ptm_getstate), + PTM_SET_STATEBLOB = _IOWR('P', 12, ptm_setstate), + PTM_STOP = _IOR('P', 13, ptm_res), + PTM_GET_CONFIG = _IOR('P', 14, ptm_getconfig), +}; + +/* + * Commands used by the non-CUSE TPMs + * + * All messages container big-endian data. + * + * The return messages only contain the 'resp' part of the unions + * in the data structures above. Besides that the limits in the + * buffers above (ptm_hdata:u.req.data and ptm_get_state:u.resp.data + * and ptm_set_state:u.req.data) are 0xffffffff. + */ +enum { + CMD_GET_CAPABILITY = 1, + CMD_INIT, + CMD_SHUTDOWN, + CMD_GET_TPMESTABLISHED, + CMD_SET_LOCALITY, + CMD_HASH_START, + CMD_HASH_DATA, + CMD_HASH_END, + CMD_CANCEL_TPM_CMD, + CMD_STORE_VOLATILE, + CMD_RESET_TPMESTABLISHED, + CMD_GET_STATEBLOB, + CMD_SET_STATEBLOB, + CMD_STOP, + CMD_GET_CONFIG, +}; + +#endif /* _TPM_IOCTL_H */ diff --git a/qapi-schema.json b/qapi-schema.json index 5728b7f..cfe0c94 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -5123,10 +5123,12 @@ # An enumeration of TPM types # # @passthrough: TPM passthrough type +# @emulator: Software Emulator TPM type +# Since: 2.10 # # Since: 1.5 ## -{ 'enum': 'TpmType', 'data': [ 'passthrough' ] } +{ 'enum': 'TpmType', 'data': [ 'passthrough', 'emulator' ] } ## # @query-tpm-types: @@ -5140,7 +5142,7 @@ # Example: # # -> { "execute": "query-tpm-types" } -# <- { "return": [ "passthrough" ] } +# <- { "return": [ "passthrough", "emulator" ] } # ## { 'command': 'query-tpm-types', 'returns': ['TpmType'] } @@ -5161,16 +5163,49 @@ '*cancel-path' : 'str'} } ## +# @TPMEmulatorOptions: +# +# Information about the TPM emulator +# +# @tpmstatedir: TPM emulator state directory +# @spawn: true if, qemu has to spawn a new emulator process with given @path, +# otherwise it connects to already rinning emulator with given @data-path +# and @ctrl-path sockets. (default: 'false') +# @path: TPM emulator binary path to spawn.(default: 'swtpm') +# @data-path: path of the unix socket to use for exchanging data messages, if +# not provided socket pairs are used when @sapwn is true. +# @ctrl-path: path of the unix socket file to use for exchagning out-of-band +# control messages, if not provided socket pairs are used when +# @spawn is true. +# @logfile: file to use to place TPM emulator logs, if not provided logging is +# disabled. +# @loglevel: optional log level number, loglevel is ignored if no logfile +# provided. (default: 5) +# +# Since: 2.10 +## +{ 'struct': 'TPMEmulatorOptions', + 'data': { 'tpmstatedir' : 'str', + 'spawn': 'bool', + '*path': 'str', + '*data-path': 'str', + '*ctrl-path': 'str', + '*logfile': 'str', + '*loglevel': 'uint8' } } + +## # @TpmTypeOptions: # # A union referencing different TPM backend types' configuration options # # @type: 'passthrough' The configuration options for the TPM passthrough type +# 'emulator' The configuration options for TPM emulator backend type # # Since: 1.5 ## { 'union': 'TpmTypeOptions', - 'data': { 'passthrough' : 'TPMPassthroughOptions' } } + 'data': { 'passthrough': 'TPMPassthroughOptions', + 'emulator': 'TPMEmulatorOptions' } } ## # @TPMInfo: diff --git a/qemu-options.hx b/qemu-options.hx index f806af9..e4dbc33 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -2883,7 +2883,15 @@ DEF("tpmdev", HAS_ARG, QEMU_OPTION_tpmdev, \ "-tpmdev passthrough,id=id[,path=path][,cancel-path=path]\n" " use path to provide path to a character device; default is /dev/tpm0\n" " use cancel-path to provide path to TPM's cancel sysfs entry; if\n" - " not provided it will be searched for in /sys/class/misc/tpm?/device\n", + " not provided it will be searched for in /sys/class/misc/tpm?/device\n" + "-tpmdev emulator,id=id,spawn=on|off,tpmstatedir=dir[,path=emulator-path,data-path=path,ctrl-path=path,logfile=path,loglevel=level]\n" + " spawn=on|off controls spawning support\n" + " use tpmstatedir to provide path to the tpm state dirctory\n" + " use path to provide the emulator binary to launch; default is 'swtpm'\n" + " use data-path to provide the socket path for exchanging data messages\n" + " use ctrl-path to provide the socket path for sending control messages to software emulator\n" + " use logfile to provide where to place the swtpm logs\n" + " use loglevel to controls the swtpm log level\n", QEMU_ARCH_ALL) STEXI @@ -2892,8 +2900,8 @@ The general form of a TPM device option is: @item -tpmdev @var{backend} ,id=@var{id} [,@var{options}] @findex -tpmdev -Backend type must be: -@option{passthrough}. +Backend type must be either one of the following: +@option{passthrough}, @option{emulator}. The specific backend type will determine the applicable options. The @code{-tpmdev} option creates the TPM backend and requires a @@ -2943,6 +2951,45 @@ To create a passthrough TPM use the following two options: Note that the @code{-tpmdev} id is @code{tpm0} and is referenced by @code{tpmdev=tpm0} in the device option. +@item -tpmdev emulator, id=@var{id}, tpmstatedir=@var{path}, spawn=@var{on|off}, path=@var{emulator-binary-path}, data-path=@var{path}, ctrl-path=@var{path}, logfile=@var{path}, loglevel=@var{level} + +(Linux-host only) Enable access to a TPM emulator using unix domain sockets. + +@option{tpmstatedir} specifies the tpm state directory + +@option{spawn} specifies if qemu should spawn new emulator process with given @option{path} + +@option{path} specifies the emulator binary path to use for spawning + +@option{data-path} optional socket path to use for exchanging TPM data with emulator + +@option{ctrl-path} optional socket path to use for sending control data to emulator + +@option{logfile} optional log file to use to place log messages + +@option{loglevel} specifies the log level to use + +To create TPM emulator backend device that spawns new swtpm binary and communicate with socket pairs: +@example + +-tpmdev emulator,id=tpm0,tpmstatedir=/tmp/my-tpm,spawn=on,path=/usr/local/bin/swtpm,logfile=/tmp/qemu-tpm.log,loglevel=5 -device tpm-tis,tpmdev=tpm0 + +@end example + +To create TPM emulator backend device that spawns new swtpm binary and communicate using unix file system sockets: +@example + +-tpmdev emulator,id=tpm0,tpmstatedir=/tmp/my-tpm,spawn=on,path=/usr/local/bin/swtpm,data-path=/tmp/swtpm-data.socket,ctrl-path=/tmp/swtpm-ctrl.socket,logfile=/tmp/qemu-tpm.log,loglevel=5 -device tpm-tis,tpmdev=tpm0 + +@end example + +To create a TOM emulator backend device that connects to already running swtpm binary using file system sockets: +@example + +-tpmdev emulator,id=tpm0,tpmstatedir=/tmp/my-tpm,spawn=off,data-path=/tmp/swtpm-data.socket,ctrl-path=/tmp/swtpm-ctrl.socket,logfile=/tmp/qemu-tpm.log,loglevel=5 -device tpm-tis,tpmdev=tpm0 + +@end example + @end table ETEXI diff --git a/tpm.c b/tpm.c index 84e9667..6d2513c 100644 --- a/tpm.c +++ b/tpm.c @@ -25,7 +25,7 @@ static QLIST_HEAD(, TPMBackend) tpm_backends = #define TPM_MAX_MODELS 1 -#define TPM_MAX_DRIVERS 1 +#define TPM_MAX_DRIVERS 2 static TPMDriverOps const *be_drivers[TPM_MAX_DRIVERS] = { NULL, -- 2.7.4 ^ permalink raw reply related [flat|nested] 24+ messages in thread
* Re: [Qemu-devel] [PATCH v4 8/8] tpm: Added support for TPM emulator 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 8/8] tpm: Added support for TPM emulator Amarnath Valluri @ 2017-05-24 15:15 ` Stefan Berger 2017-06-05 7:25 ` Valluri, Amarnath 0 siblings, 1 reply; 24+ messages in thread From: Stefan Berger @ 2017-05-24 15:15 UTC (permalink / raw) To: Amarnath Valluri, qemu-devel On 05/16/2017 03:58 AM, Amarnath Valluri wrote: > This change introduces a new TPM backend driver that can communicate with > swtpm(software TPM emulator) using unix domain socket interface. > > Swtpm uses two unix sockets, one for plain TPM commands and responses, and one > for out-of-band control messages. > > The swtpm and associated tools can be found here: > https://github.com/stefanberger/swtpm > > The swtpm's control channel protocol specification can be found here: > https://github.com/stefanberger/swtpm/wiki/Control-Channel-Specification > > Usage: > # setup TPM state directory > mkdir /tmp/mytpm > chown -R tss:root /tmp/mytpm > /usr/bin/swtpm_setup --tpm-state /tmp/mytpm --createek > > # Ask qemu to use TPM emulator with given tpm state directory > qemu-system-x86_64 \ > [...] \ > -tpmdev emulator,id=tpm0,tpmstatedir=/tmp/mytpm,logfile=/tmp/swtpm.log \ > -device tpm-tis,tpmdev=tpm0 \ > [...] > > Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> Since you are not supporting migration in this patch, you probably have to add a migrate_add_blocker() call somewhere along the lines of this here: https://github.com/stefanberger/qemu-tpm/commit/27d332dc3b2c6bfd0fcd38e69f5c899651f3a5d8#diff-3a0192eef5d20837af490c32bf396f4eR641 Otherwise it looks good to me. Stefan ^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [Qemu-devel] [PATCH v4 8/8] tpm: Added support for TPM emulator 2017-05-24 15:15 ` Stefan Berger @ 2017-06-05 7:25 ` Valluri, Amarnath 2017-06-12 19:26 ` Stefan Berger 0 siblings, 1 reply; 24+ messages in thread From: Valluri, Amarnath @ 2017-06-05 7:25 UTC (permalink / raw) To: stefanb, qemu-devel On Wed, 2017-05-24 at 11:15 -0400, Stefan Berger wrote: > On 05/16/2017 03:58 AM, Amarnath Valluri wrote: > > > > This change introduces a new TPM backend driver that can > > communicate with > > swtpm(software TPM emulator) using unix domain socket interface. > > > > Swtpm uses two unix sockets, one for plain TPM commands and > > responses, and one > > for out-of-band control messages. > > > > The swtpm and associated tools can be found here: > > https://github.com/stefanberger/swtpm > > > > The swtpm's control channel protocol specification can be found > > here: > > https://github.com/stefanberger/swtpm/wiki/Control-Channel-Spe > > cification > > > > Usage: > > # setup TPM state directory > > mkdir /tmp/mytpm > > chown -R tss:root /tmp/mytpm > > /usr/bin/swtpm_setup --tpm-state /tmp/mytpm --createek > > > > # Ask qemu to use TPM emulator with given tpm state directory > > qemu-system-x86_64 \ > > [...] \ > > -tpmdev > > emulator,id=tpm0,tpmstatedir=/tmp/mytpm,logfile=/tmp/swtpm.log \ > > -device tpm-tis,tpmdev=tpm0 \ > > [...] > > > > Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> > Since you are not supporting migration in this patch, you probably > have > to add a migrate_add_blocker() call somewhere along the lines of this > here: > > https://github.com/stefanberger/qemu-tpm/commit/27d332dc3b2c6bfd0fcd3 > 8e69f5c899651f3a5d8#diff-3a0192eef5d20837af490c32bf396f4eR641 > I need to dig a bit and femiliarize myself about 'migration' support, I guess i can send it as a separate patch ? - Amarnath ^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [Qemu-devel] [PATCH v4 8/8] tpm: Added support for TPM emulator 2017-06-05 7:25 ` Valluri, Amarnath @ 2017-06-12 19:26 ` Stefan Berger 2017-06-13 9:12 ` Valluri, Amarnath 0 siblings, 1 reply; 24+ messages in thread From: Stefan Berger @ 2017-06-12 19:26 UTC (permalink / raw) To: Valluri, Amarnath, qemu-devel On 06/05/2017 03:25 AM, Valluri, Amarnath wrote: > On Wed, 2017-05-24 at 11:15 -0400, Stefan Berger wrote: >> On 05/16/2017 03:58 AM, Amarnath Valluri wrote: >>> This change introduces a new TPM backend driver that can >>> communicate with >>> swtpm(software TPM emulator) using unix domain socket interface. >>> >>> Swtpm uses two unix sockets, one for plain TPM commands and >>> responses, and one >>> for out-of-band control messages. >>> >>> The swtpm and associated tools can be found here: >>> https://github.com/stefanberger/swtpm >>> >>> The swtpm's control channel protocol specification can be found >>> here: >>> https://github.com/stefanberger/swtpm/wiki/Control-Channel-Spe >>> cification >>> >>> Usage: >>> # setup TPM state directory >>> mkdir /tmp/mytpm >>> chown -R tss:root /tmp/mytpm >>> /usr/bin/swtpm_setup --tpm-state /tmp/mytpm --createek >>> >>> # Ask qemu to use TPM emulator with given tpm state directory >>> qemu-system-x86_64 \ >>> [...] \ >>> -tpmdev >>> emulator,id=tpm0,tpmstatedir=/tmp/mytpm,logfile=/tmp/swtpm.log \ >>> -device tpm-tis,tpmdev=tpm0 \ >>> [...] >>> >>> Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> >> Since you are not supporting migration in this patch, you probably >> have >> to add a migrate_add_blocker() call somewhere along the lines of this >> here: >> >> https://github.com/stefanberger/qemu-tpm/commit/27d332dc3b2c6bfd0fcd3 >> 8e69f5c899651f3a5d8#diff-3a0192eef5d20837af490c32bf396f4eR641 >> > I need to dig a bit and femiliarize myself about 'migration' support, I > guess i can send it as a separate patch ? Fine by me. > > - Amarnath ^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [Qemu-devel] [PATCH v4 8/8] tpm: Added support for TPM emulator 2017-06-12 19:26 ` Stefan Berger @ 2017-06-13 9:12 ` Valluri, Amarnath 0 siblings, 0 replies; 24+ messages in thread From: Valluri, Amarnath @ 2017-06-13 9:12 UTC (permalink / raw) To: stefanb, qemu-devel On Mon, 2017-06-12 at 15:26 -0400, Stefan Berger wrote: > On 06/05/2017 03:25 AM, Valluri, Amarnath wrote: > > > > On Wed, 2017-05-24 at 11:15 -0400, Stefan Berger wrote: > > > > > > On 05/16/2017 03:58 AM, Amarnath Valluri wrote: > > > > > > > > This change introduces a new TPM backend driver that can > > > > communicate with > > > > swtpm(software TPM emulator) using unix domain socket > > > > interface. > > > > > > > > Swtpm uses two unix sockets, one for plain TPM commands and > > > > responses, and one > > > > for out-of-band control messages. > > > > > > > > The swtpm and associated tools can be found here: > > > > https://github.com/stefanberger/swtpm > > > > > > > > The swtpm's control channel protocol specification can be found > > > > here: > > > > https://github.com/stefanberger/swtpm/wiki/Control-Channe > > > > l-Spe > > > > cification > > > > > > > > Usage: > > > > # setup TPM state directory > > > > mkdir /tmp/mytpm > > > > chown -R tss:root /tmp/mytpm > > > > /usr/bin/swtpm_setup --tpm-state /tmp/mytpm --createek > > > > > > > > # Ask qemu to use TPM emulator with given tpm state > > > > directory > > > > qemu-system-x86_64 \ > > > > [...] \ > > > > -tpmdev > > > > emulator,id=tpm0,tpmstatedir=/tmp/mytpm,logfile=/tmp/swtpm.log > > > > \ > > > > -device tpm-tis,tpmdev=tpm0 \ > > > > [...] > > > > > > > > Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> > > > Since you are not supporting migration in this patch, you > > > probably > > > have > > > to add a migrate_add_blocker() call somewhere along the lines of > > > this > > > here: > > > > > > https://github.com/stefanberger/qemu-tpm/commit/27d332dc3b2c6bfd0 > > > fcd3 > > > 8e69f5c899651f3a5d8#diff-3a0192eef5d20837af490c32bf396f4eR641 > > > > > I need to dig a bit and femiliarize myself about 'migration' > > support, I > > guess i can send it as a separate patch ? > Fine by me. By the way, I included this migration blocker in my latest(v5) patch series i sent. - Amarnath ^ permalink raw reply [flat|nested] 24+ messages in thread
* Re: [Qemu-devel] [PATCH v4 0/8] Provide support for the software TPM emulator 2017-05-16 7:58 [Qemu-devel] [PATCH v4 0/8] Provide support for the software TPM emulator Amarnath Valluri ` (7 preceding siblings ...) 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 8/8] tpm: Added support for TPM emulator Amarnath Valluri @ 2017-05-22 12:40 ` Valluri, Amarnath 8 siblings, 0 replies; 24+ messages in thread From: Valluri, Amarnath @ 2017-05-22 12:40 UTC (permalink / raw) To: qemu-devel; +Cc: marcandre.lureau Gentle request to review this patchset > -----Original Message----- > From: Valluri, Amarnath > Sent: Tuesday, May 16, 2017 10:58 AM > To: qemu-devel@nongnu.org > Cc: Valluri, Amarnath <amarnath.valluri@intel.com> > Subject: [Qemu-devel][PATCH v4 0/8] Provide support for the software TPM > emulator > > Briefly, Theses set of patches introduces: > - new TPM backend driver to support software TPM emulators(swtpm(1)). > - and few supported fixes/enhancements/cleanup to existing tpm backend > code. > > The similar idea was initiated earliar(2) by Stefan Berger(CCed) with slightly > different approach, using CUSE. As swtpm has excellent support for unix > domain > sockets, hence this implementation uses unix domain sockets to > communicate > with > swtpm. > > When Qemu is configured with 'emulator' tpm backend, it spawns 'swtpm' > and > communicates its via Unix domain sockets. > > 1) https://github.com/stefanberger/swtpm > 2) https://lists.nongnu.org/archive/html/qemu-devel/2016- > 01/msg00089.html > > ** Changes in V2: > - Made spawnning swtpm optional > - used QIOChannel instead of plain unix sockets > - incorporated other fixes pointed in v1 review > > ** Changes in v3: > - Addressed review comments made by Stefan Berger and Deniel P Berrange > > ** Changes in v4: > - Moved realloc_buffer() to TIS model > - Made TpmInfo related change backwards compatible. > > Amarnath Valluri (8): > tpm-backend: Remove unneeded member variable from backend class > tpm-backend: Move thread handling inside TPMBackend > tpm-backend: Initialize and free data members in it's own methods > tpm-backend: Made few interface methods optional > tmp backend: Add new api to read backend TpmInfo > tpm-backend: Move realloc_buffer() implementation to tpm-tis model > tpm-passthrough: move reusable code to utils > tpm: Added support for TPM emulator > > backends/tpm.c | 117 +++-- > configure | 15 +- > hmp.c | 27 +- > hw/tpm/Makefile.objs | 1 + > hw/tpm/tpm_emulator.c | 950 > +++++++++++++++++++++++++++++++++++++++ > hw/tpm/tpm_ioctl.h | 243 ++++++++++ > hw/tpm/tpm_passthrough.c | 238 +++------- > hw/tpm/tpm_tis.c | 14 +- > hw/tpm/tpm_util.c | 25 ++ > hw/tpm/tpm_util.h | 4 + > include/sysemu/tpm_backend.h | 96 ++-- > include/sysemu/tpm_backend_int.h | 41 -- > qapi-schema.json | 41 +- > qemu-options.hx | 53 ++- > tpm.c | 38 +- > 15 files changed, 1545 insertions(+), 358 deletions(-) create mode 100644 > hw/tpm/tpm_emulator.c create mode 100644 hw/tpm/tpm_ioctl.h delete > mode 100644 include/sysemu/tpm_backend_int.h > > -- > 2.7.4 ^ permalink raw reply [flat|nested] 24+ messages in thread
end of thread, other threads:[~2017-06-13 9:12 UTC | newest] Thread overview: 24+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2017-05-16 7:58 [Qemu-devel] [PATCH v4 0/8] Provide support for the software TPM emulator Amarnath Valluri 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 1/8] tpm-backend: Remove unneeded member variable from backend class Amarnath Valluri 2017-05-24 14:15 ` Stefan Berger 2017-05-24 14:34 ` Marc-André Lureau 2017-06-05 7:22 ` Valluri, Amarnath 2017-06-05 9:57 ` Marc-André Lureau 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 2/8] tpm-backend: Move thread handling inside TPMBackend Amarnath Valluri 2017-05-24 14:19 ` Stefan Berger 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 3/8] tpm-backend: Initialize and free data members in it's own methods Amarnath Valluri 2017-05-24 14:24 ` Stefan Berger 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 4/8] tpm-backend: Made few interface methods optional Amarnath Valluri 2017-05-24 14:28 ` Stefan Berger 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 5/8] tmp backend: Add new api to read backend TpmInfo Amarnath Valluri 2017-05-24 14:34 ` Stefan Berger 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 6/8] tpm-backend: Move realloc_buffer() implementation to tpm-tis model Amarnath Valluri 2017-05-24 14:37 ` Stefan Berger 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 7/8] tpm-passthrough: move reusable code to utils Amarnath Valluri 2017-05-24 14:39 ` Stefan Berger 2017-05-16 7:58 ` [Qemu-devel] [PATCH v4 8/8] tpm: Added support for TPM emulator Amarnath Valluri 2017-05-24 15:15 ` Stefan Berger 2017-06-05 7:25 ` Valluri, Amarnath 2017-06-12 19:26 ` Stefan Berger 2017-06-13 9:12 ` Valluri, Amarnath 2017-05-22 12:40 ` [Qemu-devel] [PATCH v4 0/8] Provide support for the software " Valluri, Amarnath
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