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.
Reviewed-by: Sumit Garg sumit.garg@linaro.org 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@foss.st.com --- Changes since v11: - Fixed missing inline description comments for the argument added to both optee_ffa_do_call_with_arg() and optee_smc_do_call_with_arg(). The issue was kindly reported by kernel test robot: https://lore.kernel.org/lkml/202310192021.fvb6JDOY-lkp@intel.com/
No change since v10
Changes since v9: - Applied Sumit R-b tag: https://lore.kernel.org/lkml/CAFA6WYMwWFRUo719wHHsjaAUOSdo4cMa8gdHBMWidP4vC4... - Updated my e-mail address.
No change since v8 No change since v7
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 | 11 +++++++---- drivers/tee/optee/optee_private.h | 9 ++++++--- drivers/tee/optee/smc_abi.c | 16 +++++++++------- 5 files changed, 42 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..721fd4d24f47 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) @@ -604,6 +605,7 @@ static int optee_ffa_yielding_call(struct tee_context *ctx, * @ctx: calling context * @shm: shared memory holding the message to pass to secure world * @offs: offset of the message in @shm + * @system_thread: true if caller requests TEE system thread support * * Does a FF-A call to OP-TEE in secure world and handles eventual resulting * Remote Procedure Calls (RPC) from OP-TEE. @@ -612,7 +614,8 @@ 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 +645,7 @@ 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 6bb5cae09688..b659a6f521df 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 { @@ -250,7 +252,8 @@ 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); @@ -299,7 +302,7 @@ 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 d5b28fd35d66..8ae5e1047650 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: @@ -878,6 +878,7 @@ static void optee_handle_rpc(struct tee_context *ctx, * @ctx: calling context * @shm: shared memory holding the message to pass to secure world * @offs: offset of the message in @shm + * @system_thread: true if caller requests TEE system thread support * * Does and SMC to OP-TEE in secure world and handles eventual resulting * Remote Procedure Calls (RPC) from OP-TEE. @@ -885,7 +886,8 @@ 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 +928,7 @@ static int optee_smc_do_call_with_arg(struct tee_context *ctx, reg_pair_from_64(¶m.a1, ¶m.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 +979,7 @@ 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;