Adds an argument to do_call_with_arg() handler to tell whether the call is a system call or nor. This change always sets this info to false hence no functional change.

This change prepares management of system invocation proposed in a later change.

Co-developed-by: Jens Wiklander jens.wiklander@linaro.org Signed-off-by: Jens Wiklander jens.wiklander@linaro.org Signed-off-by: Etienne Carriere etienne.carriere@linaro.org --- Changes since v6: - Squashed a part of patch v6 3/4 changes into this patch v7 1/4 related to adding boolean system thread attribute into optee driver call queue and SMC/FF-A ABIs API functions. - Removed local variable sys_thread set to constant false value and use false straight as function argument instead. - Comment on struct optee_session::use_sys_thread being read with optee mutex locked is not addressed as still under discussion.

No changes since v5

Changes since v4: - New change, extracted from PATCH v4 1/2 (tee: system invocation") and revised to cover preparatory changes in optee driver for system session support with contribution from Jens. --- drivers/tee/optee/call.c | 24 +++++++++++++++++------- drivers/tee/optee/core.c | 5 +++-- drivers/tee/optee/ffa_abi.c | 10 ++++++---- drivers/tee/optee/optee_private.h | 9 ++++++--- drivers/tee/optee/smc_abi.c | 15 ++++++++------- 5 files changed, 40 insertions(+), 23 deletions(-)

diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c index df5fb5410b72..152ae9bb1785 100644 --- a/drivers/tee/optee/call.c +++ b/drivers/tee/optee/call.c @@ -40,7 +40,7 @@ struct optee_shm_arg_entry { };

void optee_cq_wait_init(struct optee_call_queue *cq, - struct optee_call_waiter *w) + struct optee_call_waiter *w, bool sys_thread) { /* * We're preparing to make a call to secure world. In case we can't @@ -328,7 +328,8 @@ int optee_open_session(struct tee_context *ctx, goto out; }

- if (optee->ops->do_call_with_arg(ctx, shm, offs)) { + if (optee->ops->do_call_with_arg(ctx, shm, offs, + sess->use_sys_thread)) { msg_arg->ret = TEEC_ERROR_COMMUNICATION; msg_arg->ret_origin = TEEC_ORIGIN_COMMS; } @@ -360,7 +361,8 @@ int optee_open_session(struct tee_context *ctx, return rc; }

-int optee_close_session_helper(struct tee_context *ctx, u32 session) +int optee_close_session_helper(struct tee_context *ctx, u32 session, + bool system_thread) { struct optee *optee = tee_get_drvdata(ctx->teedev); struct optee_shm_arg_entry *entry; @@ -374,7 +376,7 @@ int optee_close_session_helper(struct tee_context *ctx, u32 session)

msg_arg->cmd = OPTEE_MSG_CMD_CLOSE_SESSION; msg_arg->session = session; - optee->ops->do_call_with_arg(ctx, shm, offs); + optee->ops->do_call_with_arg(ctx, shm, offs, system_thread);

optee_free_msg_arg(ctx, entry, offs);

@@ -385,6 +387,7 @@ int optee_close_session(struct tee_context *ctx, u32 session) { struct optee_context_data *ctxdata = ctx->data; struct optee_session *sess; + bool system_thread;

/* Check that the session is valid and remove it from the list */ mutex_lock(&ctxdata->mutex); @@ -394,9 +397,10 @@ int optee_close_session(struct tee_context *ctx, u32 session) mutex_unlock(&ctxdata->mutex); if (!sess) return -EINVAL; + system_thread = sess->use_sys_thread; kfree(sess);

- return optee_close_session_helper(ctx, session); + return optee_close_session_helper(ctx, session, system_thread); }

int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg, @@ -408,12 +412,15 @@ int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg, struct optee_msg_arg *msg_arg; struct optee_session *sess; struct tee_shm *shm; + bool system_thread; u_int offs; int rc;

/* Check that the session is valid */ mutex_lock(&ctxdata->mutex); sess = find_session(ctxdata, arg->session); + if (sess) + system_thread = sess->use_sys_thread; mutex_unlock(&ctxdata->mutex); if (!sess) return -EINVAL; @@ -432,7 +439,7 @@ int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg, if (rc) goto out;

- if (optee->ops->do_call_with_arg(ctx, shm, offs)) { + if (optee->ops->do_call_with_arg(ctx, shm, offs, system_thread)) { msg_arg->ret = TEEC_ERROR_COMMUNICATION; msg_arg->ret_origin = TEEC_ORIGIN_COMMS; } @@ -457,12 +464,15 @@ int optee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session) struct optee_shm_arg_entry *entry; struct optee_msg_arg *msg_arg; struct optee_session *sess; + bool system_thread; struct tee_shm *shm; u_int offs;

/* Check that the session is valid */ mutex_lock(&ctxdata->mutex); sess = find_session(ctxdata, session); + if (sess) + system_thread = sess->use_sys_thread; mutex_unlock(&ctxdata->mutex); if (!sess) return -EINVAL; @@ -474,7 +484,7 @@ int optee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session) msg_arg->cmd = OPTEE_MSG_CMD_CANCEL; msg_arg->session = session; msg_arg->cancel_id = cancel_id; - optee->ops->do_call_with_arg(ctx, shm, offs); + optee->ops->do_call_with_arg(ctx, shm, offs, system_thread);

optee_free_msg_arg(ctx, entry, offs); return 0; diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c index 2a258bd3b6b5..d01ca47f7bde 100644 --- a/drivers/tee/optee/core.c +++ b/drivers/tee/optee/core.c @@ -129,7 +129,8 @@ int optee_open(struct tee_context *ctx, bool cap_memref_null)

static void optee_release_helper(struct tee_context *ctx, int (*close_session)(struct tee_context *ctx, - u32 session)) + u32 session, + bool system_thread)) { struct optee_context_data *ctxdata = ctx->data; struct optee_session *sess; @@ -141,7 +142,7 @@ static void optee_release_helper(struct tee_context *ctx, list_for_each_entry_safe(sess, sess_tmp, &ctxdata->sess_list, list_node) { list_del(&sess->list_node); - close_session(ctx, sess->session_id); + close_session(ctx, sess->session_id, sess->use_sys_thread); kfree(sess); } kfree(ctxdata); diff --git a/drivers/tee/optee/ffa_abi.c b/drivers/tee/optee/ffa_abi.c index 0828240f27e6..5fde9d4100e3 100644 --- a/drivers/tee/optee/ffa_abi.c +++ b/drivers/tee/optee/ffa_abi.c @@ -528,7 +528,8 @@ static void optee_handle_ffa_rpc(struct tee_context *ctx, struct optee *optee,

static int optee_ffa_yielding_call(struct tee_context *ctx, struct ffa_send_direct_data *data, - struct optee_msg_arg *rpc_arg) + struct optee_msg_arg *rpc_arg, + bool system_thread) { struct optee *optee = tee_get_drvdata(ctx->teedev); struct ffa_device *ffa_dev = optee->ffa.ffa_dev; @@ -541,7 +542,7 @@ static int optee_ffa_yielding_call(struct tee_context *ctx, int rc;

/* Initialize waiter */ - optee_cq_wait_init(&optee->call_queue, &w); + optee_cq_wait_init(&optee->call_queue, &w, system_thread); while (true) { rc = msg_ops->sync_send_receive(ffa_dev, data); if (rc) @@ -612,7 +613,8 @@ static int optee_ffa_yielding_call(struct tee_context *ctx, */

static int optee_ffa_do_call_with_arg(struct tee_context *ctx, - struct tee_shm *shm, u_int offs) + struct tee_shm *shm, u_int offs, + bool system_thread) { struct ffa_send_direct_data data = { .data0 = OPTEE_FFA_YIELDING_CALL_WITH_ARG, @@ -642,7 +644,7 @@ static int optee_ffa_do_call_with_arg(struct tee_context *ctx, if (IS_ERR(rpc_arg)) return PTR_ERR(rpc_arg);

- return optee_ffa_yielding_call(ctx, &data, rpc_arg); + return optee_ffa_yielding_call(ctx, &data, rpc_arg, system_thread); }

/* diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h index 72685ee0d53f..b68273051454 100644 --- a/drivers/tee/optee/optee_private.h +++ b/drivers/tee/optee/optee_private.h @@ -154,7 +154,8 @@ struct optee; */ struct optee_ops { int (*do_call_with_arg)(struct tee_context *ctx, - struct tee_shm *shm_arg, u_int offs); + struct tee_shm *shm_arg, u_int offs, + bool system_thread); int (*to_msg_param)(struct optee *optee, struct optee_msg_param *msg_params, size_t num_params, const struct tee_param *params); @@ -204,6 +205,7 @@ struct optee { struct optee_session { struct list_head list_node; u32 session_id; + bool use_sys_thread; };

struct optee_context_data { @@ -252,7 +254,8 @@ int optee_supp_send(struct tee_context *ctx, u32 ret, u32 num_params, int optee_open_session(struct tee_context *ctx, struct tee_ioctl_open_session_arg *arg, struct tee_param *param); -int optee_close_session_helper(struct tee_context *ctx, u32 session); +int optee_close_session_helper(struct tee_context *ctx, u32 session, + bool system_thread); int optee_close_session(struct tee_context *ctx, u32 session); int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg, struct tee_param *param); @@ -301,7 +304,7 @@ static inline void optee_to_msg_param_value(struct optee_msg_param *mp, }

void optee_cq_wait_init(struct optee_call_queue *cq, - struct optee_call_waiter *w); + struct optee_call_waiter *w, bool sys_thread); void optee_cq_wait_for_completion(struct optee_call_queue *cq, struct optee_call_waiter *w); void optee_cq_wait_final(struct optee_call_queue *cq, diff --git a/drivers/tee/optee/smc_abi.c b/drivers/tee/optee/smc_abi.c index 49702cb08f4f..e2763cdcf111 100644 --- a/drivers/tee/optee/smc_abi.c +++ b/drivers/tee/optee/smc_abi.c @@ -283,7 +283,7 @@ static void optee_enable_shm_cache(struct optee *optee) struct optee_call_waiter w;

/* We need to retry until secure world isn't busy. */ - optee_cq_wait_init(&optee->call_queue, &w); + optee_cq_wait_init(&optee->call_queue, &w, false); while (true) { struct arm_smccc_res res;

@@ -308,7 +308,7 @@ static void __optee_disable_shm_cache(struct optee *optee, bool is_mapped) struct optee_call_waiter w;

/* We need to retry until secure world isn't busy. */ - optee_cq_wait_init(&optee->call_queue, &w); + optee_cq_wait_init(&optee->call_queue, &w, false); while (true) { union { struct arm_smccc_res smccc; @@ -507,7 +507,7 @@ static int optee_shm_register(struct tee_context *ctx, struct tee_shm *shm, msg_arg->params->u.tmem.buf_ptr = virt_to_phys(pages_list) | (tee_shm_get_page_offset(shm) & (OPTEE_MSG_NONCONTIG_PAGE_SIZE - 1));

- if (optee->ops->do_call_with_arg(ctx, shm_arg, 0) || + if (optee->ops->do_call_with_arg(ctx, shm_arg, 0, false) || msg_arg->ret != TEEC_SUCCESS) rc = -EINVAL;

@@ -550,7 +550,7 @@ static int optee_shm_unregister(struct tee_context *ctx, struct tee_shm *shm) msg_arg->params[0].attr = OPTEE_MSG_ATTR_TYPE_RMEM_INPUT; msg_arg->params[0].u.rmem.shm_ref = (unsigned long)shm;

- if (optee->ops->do_call_with_arg(ctx, shm_arg, 0) || + if (optee->ops->do_call_with_arg(ctx, shm_arg, 0, false) || msg_arg->ret != TEEC_SUCCESS) rc = -EINVAL; out: @@ -885,7 +885,8 @@ static void optee_handle_rpc(struct tee_context *ctx, * Returns return code from secure world, 0 is OK */ static int optee_smc_do_call_with_arg(struct tee_context *ctx, - struct tee_shm *shm, u_int offs) + struct tee_shm *shm, u_int offs, + bool system_thread) { struct optee *optee = tee_get_drvdata(ctx->teedev); struct optee_call_waiter w; @@ -926,7 +927,7 @@ static int optee_smc_do_call_with_arg(struct tee_context *ctx, reg_pair_from_64(&param.a1, &param.a2, parg); } /* Initialize waiter */ - optee_cq_wait_init(&optee->call_queue, &w); + optee_cq_wait_init(&optee->call_queue, &w, system_thread); while (true) { struct arm_smccc_res res;

@@ -977,7 +978,7 @@ static int simple_call_with_arg(struct tee_context *ctx, u32 cmd) return PTR_ERR(msg_arg);

msg_arg->cmd = cmd; - optee_smc_do_call_with_arg(ctx, shm, offs); + optee_smc_do_call_with_arg(ctx, shm, offs, false);

optee_free_msg_arg(ctx, entry, offs); return 0;

Adds support in the OP-TEE driver to keep track of reserved system threads. The optee_cq_*() functions are updated to handle this if enabled. The SMC ABI part of the driver enables this tracking, but the FF-A ABI part does not.

The call queue list optee_call_queue::waiters is replaced by 2 lists, one for regular sessions and one system sessions. The struct also stores count of TEE thread contexts provisioned/used/reserved to track use of TEE resources. The logic ensures reserved TEE system threads do not exhaust the total number of thread contexts available in OP-TEE. For sake of simplicity, initialization of call queue management is factorized into new helper function optee_cq_init().

Co-developed-by: Jens Wiklander jens.wiklander@linaro.org Signed-off-by: Jens Wiklander jens.wiklander@linaro.org Signed-off-by: Etienne Carriere etienne.carriere@linaro.org --- Changes since v6: - Moved out changes related to adding boolean system thread attribute into optee driver call queue and SMC/FF-A ABIs API functions. These changes were squashed into patch 1/4 of this patch v7 series. - Comment about adding a specific commit for call queue refactoring was not addressed such a patch would only introduce function optee_cq_init() with very little content in (mutex & list init). - Added Co-developed-by tag for Jens contribution as he's not responsible for the changes I made in this patch v7.

No change since v5

Changes since v4: - New change that supersedes implementation proposed in PATCH v4 (tee: system invocation"). Thanks to Jens implementation we don't need the new OP-TEE services that my previous patch versions introduced to monitor system threads entry. Now, Linux optee SMC ABI driver gets TEE provisioned thread contexts count once and monitors thread entries in OP-TEE on that basis and the system thread capability of the related tee session. By the way, I dropped the WARN_ONCE() call I suggested on tee thread exhaustion as it does not provides useful information. --- drivers/tee/optee/call.c | 126 ++++++++++++++++++++++++++++-- drivers/tee/optee/ffa_abi.c | 3 +- drivers/tee/optee/optee_private.h | 11 ++- drivers/tee/optee/smc_abi.c | 16 +++- 4 files changed, 143 insertions(+), 13 deletions(-)

diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c index 152ae9bb1785..c2d484201f79 100644 --- a/drivers/tee/optee/call.c +++ b/drivers/tee/optee/call.c @@ -39,9 +39,26 @@ struct optee_shm_arg_entry { DECLARE_BITMAP(map, MAX_ARG_COUNT_PER_ENTRY); };

+void optee_cq_init(struct optee_call_queue *cq, int thread_count) +{ + mutex_init(&cq->mutex); + INIT_LIST_HEAD(&cq->normal_waiters); + INIT_LIST_HEAD(&cq->sys_waiters); + /* + * If cq->total_thread_count is 0 then we're not trying to keep + * track of how many free threads we have, instead we're relying on + * the secure world to tell us when we're out of thread and have to + * wait for another thread to become available. + */ + cq->total_thread_count = thread_count; + cq->free_normal_thread_count = thread_count; +} + void optee_cq_wait_init(struct optee_call_queue *cq, struct optee_call_waiter *w, bool sys_thread) { + bool need_wait = false; + /* * We're preparing to make a call to secure world. In case we can't * allocate a thread in secure world we'll end up waiting in @@ -53,15 +70,40 @@ void optee_cq_wait_init(struct optee_call_queue *cq, mutex_lock(&cq->mutex);

/* - * We add ourselves to the queue, but we don't wait. This - * guarantees that we don't lose a completion if secure world - * returns busy and another thread just exited and try to complete - * someone. + * We add ourselves to a queue, but we don't wait. This guarantees + * that we don't lose a completion if secure world returns busy and + * another thread just exited and try to complete someone. */ init_completion(&w->c); - list_add_tail(&w->list_node, &cq->waiters); + w->sys_thread = sys_thread; + if (sys_thread) { + list_add_tail(&w->list_node, &cq->sys_waiters); + } else { + list_add_tail(&w->list_node, &cq->normal_waiters); + if (cq->total_thread_count) { + /* + * Claim a normal thread if one is available, else + * we'll need to wait for a normal thread to be + * released. + */ + if (cq->free_normal_thread_count > 0) + cq->free_normal_thread_count--; + else + need_wait = true; + } + }

mutex_unlock(&cq->mutex); + + while (need_wait) { + optee_cq_wait_for_completion(cq, w); + mutex_lock(&cq->mutex); + if (cq->free_normal_thread_count > 0) { + cq->free_normal_thread_count--; + need_wait = false; + } + mutex_unlock(&cq->mutex); + } }

void optee_cq_wait_for_completion(struct optee_call_queue *cq, @@ -74,7 +116,10 @@ void optee_cq_wait_for_completion(struct optee_call_queue *cq, /* Move to end of list to get out of the way for other waiters */ list_del(&w->list_node); reinit_completion(&w->c); - list_add_tail(&w->list_node, &cq->waiters); + if (w->sys_thread) + list_add_tail(&w->list_node, &cq->sys_waiters); + else + list_add_tail(&w->list_node, &cq->normal_waiters);

mutex_unlock(&cq->mutex); } @@ -83,10 +128,19 @@ static void optee_cq_complete_one(struct optee_call_queue *cq) { struct optee_call_waiter *w;

- list_for_each_entry(w, &cq->waiters, list_node) { + list_for_each_entry(w, &cq->sys_waiters, list_node) { if (!completion_done(&w->c)) { complete(&w->c); - break; + return; + } + } + + if (!cq->total_thread_count || cq->free_normal_thread_count > 0) { + list_for_each_entry(w, &cq->normal_waiters, list_node) { + if (!completion_done(&w->c)) { + complete(&w->c); + break; + } } } } @@ -104,6 +158,9 @@ void optee_cq_wait_final(struct optee_call_queue *cq, /* Get out of the list */ list_del(&w->list_node);

+ if (!w->sys_thread) + cq->free_normal_thread_count++; /* Release a normal thread */ + /* Wake up one eventual waiting task */ optee_cq_complete_one(cq);

@@ -119,6 +176,36 @@ void optee_cq_wait_final(struct optee_call_queue *cq, mutex_unlock(&cq->mutex); }

+bool optee_cq_inc_sys_thread_count(struct optee_call_queue *cq) +{ + bool rc = false; + + mutex_lock(&cq->mutex); + + /* Leave at least 1 normal (non-system) thread */ + if (cq->res_sys_thread_count + 1 < cq->total_thread_count) { + cq->free_normal_thread_count--; + cq->res_sys_thread_count++; + rc = true; + } + + mutex_unlock(&cq->mutex); + + return rc; +} + +void optee_cq_dec_sys_thread_count(struct optee_call_queue *cq) +{ + mutex_lock(&cq->mutex); + if (cq->res_sys_thread_count > 0) { + cq->res_sys_thread_count--; + cq->free_normal_thread_count++; + /* If there's someone waiting, let it resume */ + optee_cq_complete_one(cq); + } + mutex_unlock(&cq->mutex); +} + /* Requires the filpstate mutex to be held */ static struct optee_session *find_session(struct optee_context_data *ctxdata, u32 session_id) @@ -361,6 +448,27 @@ int optee_open_session(struct tee_context *ctx, return rc; }

+int optee_system_session(struct tee_context *ctx, u32 session) +{ + struct optee_context_data *ctxdata = ctx->data; + struct optee *optee = tee_get_drvdata(ctx->teedev); + struct optee_session *sess; + int rc = -EINVAL; + + mutex_lock(&ctxdata->mutex); + + sess = find_session(ctxdata, session); + if (sess && !sess->use_sys_thread && + optee_cq_inc_sys_thread_count(&optee->call_queue)) { + rc = 0; + sess->use_sys_thread = true; + } + + mutex_unlock(&ctxdata->mutex); + + return rc; +} + int optee_close_session_helper(struct tee_context *ctx, u32 session, bool system_thread) { @@ -378,6 +486,8 @@ int optee_close_session_helper(struct tee_context *ctx, u32 session, msg_arg->session = session; optee->ops->do_call_with_arg(ctx, shm, offs, system_thread);

+ if (system_thread) + optee_cq_dec_sys_thread_count(&optee->call_queue); optee_free_msg_arg(ctx, entry, offs);

return 0; diff --git a/drivers/tee/optee/ffa_abi.c b/drivers/tee/optee/ffa_abi.c index 5fde9d4100e3..0c9055691343 100644 --- a/drivers/tee/optee/ffa_abi.c +++ b/drivers/tee/optee/ffa_abi.c @@ -852,8 +852,7 @@ static int optee_ffa_probe(struct ffa_device *ffa_dev) if (rc) goto err_unreg_supp_teedev; mutex_init(&optee->ffa.mutex); - mutex_init(&optee->call_queue.mutex); - INIT_LIST_HEAD(&optee->call_queue.waiters); + optee_cq_init(&optee->call_queue, 0); optee_supp_init(&optee->supp); optee_shm_arg_cache_init(optee, arg_cache_flags); ffa_dev_set_drvdata(ffa_dev, optee); diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h index b68273051454..6e0863a70843 100644 --- a/drivers/tee/optee/optee_private.h +++ b/drivers/tee/optee/optee_private.h @@ -43,12 +43,17 @@ typedef void (optee_invoke_fn)(unsigned long, unsigned long, unsigned long, struct optee_call_waiter { struct list_head list_node; struct completion c; + bool sys_thread; };

struct optee_call_queue { /* Serializes access to this struct */ struct mutex mutex; - struct list_head waiters; + struct list_head normal_waiters; + struct list_head sys_waiters; + int total_thread_count; + int free_normal_thread_count; + int res_sys_thread_count; };

struct optee_notif { @@ -254,6 +259,7 @@ int optee_supp_send(struct tee_context *ctx, u32 ret, u32 num_params, int optee_open_session(struct tee_context *ctx, struct tee_ioctl_open_session_arg *arg, struct tee_param *param); +int optee_system_session(struct tee_context *ctx, u32 session); int optee_close_session_helper(struct tee_context *ctx, u32 session, bool system_thread); int optee_close_session(struct tee_context *ctx, u32 session); @@ -303,6 +309,9 @@ static inline void optee_to_msg_param_value(struct optee_msg_param *mp, mp->u.value.c = p->u.value.c; }

+void optee_cq_init(struct optee_call_queue *cq, int thread_count); +bool optee_cq_inc_sys_thread_count(struct optee_call_queue *cq); +void optee_cq_dec_sys_thread_count(struct optee_call_queue *cq); void optee_cq_wait_init(struct optee_call_queue *cq, struct optee_call_waiter *w, bool sys_thread); void optee_cq_wait_for_completion(struct optee_call_queue *cq, diff --git a/drivers/tee/optee/smc_abi.c b/drivers/tee/optee/smc_abi.c index e2763cdcf111..3314ffeb91c8 100644 --- a/drivers/tee/optee/smc_abi.c +++ b/drivers/tee/optee/smc_abi.c @@ -1209,6 +1209,7 @@ static const struct tee_driver_ops optee_clnt_ops = { .release = optee_release, .open_session = optee_open_session, .close_session = optee_close_session, + .system_session = optee_system_session, .invoke_func = optee_invoke_func, .cancel_req = optee_cancel_req, .shm_register = optee_shm_register, @@ -1356,6 +1357,16 @@ static bool optee_msg_exchange_capabilities(optee_invoke_fn *invoke_fn, return true; }

+static unsigned int optee_msg_get_thread_count(optee_invoke_fn *invoke_fn) +{ + struct arm_smccc_res res; + + invoke_fn(OPTEE_SMC_GET_THREAD_COUNT, 0, 0, 0, 0, 0, 0, 0, &res); + if (res.a0) + return 0; + return res.a1; +} + static struct tee_shm_pool * optee_config_shm_memremap(optee_invoke_fn *invoke_fn, void **memremaped_shm) { @@ -1609,6 +1620,7 @@ static int optee_probe(struct platform_device *pdev) struct optee *optee = NULL; void *memremaped_shm = NULL; unsigned int rpc_param_count; + unsigned int thread_count; struct tee_device *teedev; struct tee_context *ctx; u32 max_notif_value; @@ -1636,6 +1648,7 @@ static int optee_probe(struct platform_device *pdev) return -EINVAL; }

+ thread_count = optee_msg_get_thread_count(invoke_fn); if (!optee_msg_exchange_capabilities(invoke_fn, &sec_caps, &max_notif_value, &rpc_param_count)) { @@ -1725,8 +1738,7 @@ static int optee_probe(struct platform_device *pdev) if (rc) goto err_unreg_supp_teedev;

- mutex_init(&optee->call_queue.mutex); - INIT_LIST_HEAD(&optee->call_queue.waiters); + optee_cq_init(&optee->call_queue, thread_count); optee_supp_init(&optee->supp); optee->smc.memremaped_shm = memremaped_shm; optee->pool = pool;