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Message-Id: <20230320162801.2811542-1-etienne.carriere@linaro.org>
Date: Mon, 20 Mar 2023 17:27:58 +0100
From: Etienne Carriere <etienne.carriere@...aro.org>
To: linux-kernel@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org,
op-tee@...ts.trustedfirmware.org,
Sumit Garg <sumit.garg@...aro.org>,
Jens Wiklander <jens.wiklander@...aro.org>,
Sudeep Holla <sudeep.holla@....com>,
Cristian Marussi <cristian.marussi@....com>,
Etienne Carriere <etienne.carriere@...aro.org>
Subject: [PATCH v5 1/4] tee: optee: system call property
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@...aro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@...aro.org>
Signed-off-by: Etienne Carriere <etienne.carriere@...aro.org>
---
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 | 22 ++++++++++++++++------
drivers/tee/optee/core.c | 5 +++--
drivers/tee/optee/ffa_abi.c | 3 ++-
drivers/tee/optee/optee_private.h | 7 +++++--
drivers/tee/optee/smc_abi.c | 9 +++++----
5 files changed, 31 insertions(+), 15 deletions(-)
diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c
index 290b1bb0e9cd..844d2bdc68db 100644
--- a/drivers/tee/optee/call.c
+++ b/drivers/tee/optee/call.c
@@ -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..52cec9d06041 100644
--- a/drivers/tee/optee/ffa_abi.c
+++ b/drivers/tee/optee/ffa_abi.c
@@ -612,7 +612,8 @@ 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,
diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h
index 04ae58892608..bdbc0dc293bb 100644
--- a/drivers/tee/optee/optee_private.h
+++ b/drivers/tee/optee/optee_private.h
@@ -130,7 +130,8 @@ 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);
@@ -180,6 +181,7 @@ struct optee {
struct optee_session {
struct list_head list_node;
u32 session_id;
+ bool use_sys_thread;
};
struct optee_context_data {
@@ -228,7 +230,8 @@ 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);
diff --git a/drivers/tee/optee/smc_abi.c b/drivers/tee/optee/smc_abi.c
index a1c1fa1a9c28..df77700804e5 100644
--- a/drivers/tee/optee/smc_abi.c
+++ b/drivers/tee/optee/smc_abi.c
@@ -487,7 +487,7 @@ 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;
@@ -530,7 +530,7 @@ 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:
@@ -865,7 +865,8 @@ 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;
@@ -957,7 +958,7 @@ 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;
--
2.25.1
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