[PATCH v15 0/8] Introduction of a remoteproc tee to load signed firmware

[PATCH v15 0/8] Introduction of a remoteproc tee to load signed firmware

[Arnaud Pouliquen]

Main updates from version V14[1]:
Fix Rename missing load() to load_segments() in pru_rproc.c.

Main updates from version V13[2]:
- Introduce new rproc_ops operation: load_fw() and release_fw(),
- Rename load() operation to load_segments() in rproc_ops structure and
  drivers.

More details are available in each patch commit message.

[1] https://lore.kernel.org/linux-arm-kernel/20241126091042.918144-1-arnaud.pouliquen@foss.st.com/T/
[2] https://lore.kernel.org/linux-arm-kernel/20241104133515.256497-1-arnaud.pouliquen@foss.st.com/T/

Tested-on: commit adc218676eef ("Linux 6.12")
Description of the feature:
--------------------------
This series proposes the implementation of a remoteproc tee driver to
communicate with a TEE trusted application responsible for authenticating
and loading the remoteproc firmware image in an Arm secure context.

1) Principle:

The remoteproc tee driver provides services to communicate with the OP-TEE
trusted application running on the Trusted Execution Context (TEE).
The trusted application in TEE manages the remote processor lifecycle:

- authenticating and loading firmware images,
- isolating and securing the remote processor memories,
- supporting multi-firmware (e.g., TF-M + Zephyr on a Cortex-M33),
- managing the start and stop of the firmware by the TEE.

2) Format of the signed image:

Refer to:
https://github.com/OP-TEE/optee_os/blob/master/ta/remoteproc/src/remoteproc_core.c#L18-L57

3) OP-TEE trusted application API:

Refer to:
https://github.com/OP-TEE/optee_os/blob/master/ta/remoteproc/include/ta_remoteproc.h

4) OP-TEE signature script

Refer to:
https://github.com/OP-TEE/optee_os/blob/master/scripts/sign_rproc_fw.py

Example of usage:
sign_rproc_fw.py --in <fw1.elf> --in <fw2.elf> --out <signed_fw.sign> --key ${OP-TEE_PATH}/keys/default.pem


5) Impact on User space Application

No sysfs impact. The user only needs to provide the signed firmware image
instead of the ELF image.


For more information about the implementation, a presentation is available here
(note that the format of the signed image has evolved between the presentation
and the integration in OP-TEE).

https://resources.linaro.org/en/resource/6c5bGvZwUAjX56fvxthxds

Arnaud Pouliquen (8):
  remoteproc: core: Introduce rproc_pa_to_va helper
  remoteproc: Add TEE support
  remoteproc: Introduce load_fw and release_fw optional operation
  remoteproc: Rename load() operation to load_segments() in rproc_ops
    struct
  remoteproc: Make load_segments and load_fw ops exclusive and optional
  dt-bindings: remoteproc: Add compatibility for TEE support
  remoteproc: stm32: Create sub-functions to request shutdown and
    release
  remoteproc: stm32: Add support of an OP-TEE TA to load the firmware

 .../bindings/remoteproc/st,stm32-rproc.yaml   |  58 +-
 drivers/remoteproc/Kconfig                    |  10 +
 drivers/remoteproc/Makefile                   |   1 +
 drivers/remoteproc/imx_dsp_rproc.c            |   2 +-
 drivers/remoteproc/imx_rproc.c                |   2 +-
 drivers/remoteproc/meson_mx_ao_arc.c          |   2 +-
 drivers/remoteproc/mtk_scp.c                  |   2 +-
 drivers/remoteproc/pru_rproc.c                |   2 +-
 drivers/remoteproc/qcom_q6v5_adsp.c           |   2 +-
 drivers/remoteproc/qcom_q6v5_mss.c            |   2 +-
 drivers/remoteproc/qcom_q6v5_pas.c            |   4 +-
 drivers/remoteproc/qcom_q6v5_wcss.c           |   4 +-
 drivers/remoteproc/qcom_wcnss.c               |   2 +-
 drivers/remoteproc/rcar_rproc.c               |   2 +-
 drivers/remoteproc/remoteproc_core.c          |  68 ++-
 drivers/remoteproc/remoteproc_internal.h      |  20 +-
 drivers/remoteproc/remoteproc_tee.c           | 508 ++++++++++++++++++
 drivers/remoteproc/st_remoteproc.c            |   2 +-
 drivers/remoteproc/st_slim_rproc.c            |   2 +-
 drivers/remoteproc/stm32_rproc.c              | 141 +++--
 drivers/remoteproc/xlnx_r5_remoteproc.c       |   2 +-
 include/linux/remoteproc.h                    |  20 +-
 include/linux/remoteproc_tee.h                | 105 ++++
 23 files changed, 894 insertions(+), 69 deletions(-)
 create mode 100644 drivers/remoteproc/remoteproc_tee.c
 create mode 100644 include/linux/remoteproc_tee.h


base-commit: adc218676eef25575469234709c2d87185ca223a
-- 
2.25.1

[PATCH v15 4/8] remoteproc: Rename load() operation to load_segments() in rproc_ops struct

[Arnaud Pouliquen]

With the introduction of the load_fw() operation in the rproc_ops
structure, we need to clarify the difference in the use of the load()
and load_fw() ops.

The legacy load() is dedicated to loading the ELF segments into memory.
Rename this to a more explicit name: load_segments().

Suggested-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
---
Update vs version V14:
Fix: Rename missing load() to load_segments() in drivers/remoteproc/pru_rproc.c.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202411281332.Ra70nJAW-lkp@intel.com/

---
 drivers/remoteproc/imx_dsp_rproc.c       | 2 +-
 drivers/remoteproc/imx_rproc.c           | 2 +-
 drivers/remoteproc/meson_mx_ao_arc.c     | 2 +-
 drivers/remoteproc/mtk_scp.c             | 2 +-
 drivers/remoteproc/pru_rproc.c           | 2 +-
 drivers/remoteproc/qcom_q6v5_adsp.c      | 2 +-
 drivers/remoteproc/qcom_q6v5_mss.c       | 2 +-
 drivers/remoteproc/qcom_q6v5_pas.c       | 4 ++--
 drivers/remoteproc/qcom_q6v5_wcss.c      | 4 ++--
 drivers/remoteproc/qcom_wcnss.c          | 2 +-
 drivers/remoteproc/rcar_rproc.c          | 2 +-
 drivers/remoteproc/remoteproc_core.c     | 4 ++--
 drivers/remoteproc/remoteproc_internal.h | 4 ++--
 drivers/remoteproc/st_remoteproc.c       | 2 +-
 drivers/remoteproc/st_slim_rproc.c       | 2 +-
 drivers/remoteproc/stm32_rproc.c         | 2 +-
 drivers/remoteproc/xlnx_r5_remoteproc.c  | 2 +-
 include/linux/remoteproc.h               | 4 ++--
 18 files changed, 23 insertions(+), 23 deletions(-)

diff --git a/drivers/remoteproc/imx_dsp_rproc.c b/drivers/remoteproc/imx_dsp_rproc.c
index 376187ad5754..a4a85fbce907 100644
--- a/drivers/remoteproc/imx_dsp_rproc.c
+++ b/drivers/remoteproc/imx_dsp_rproc.c
@@ -934,7 +934,7 @@ static const struct rproc_ops imx_dsp_rproc_ops = {
 	.start		= imx_dsp_rproc_start,
 	.stop		= imx_dsp_rproc_stop,
 	.kick		= imx_dsp_rproc_kick,
-	.load		= imx_dsp_rproc_elf_load_segments,
+	.load_segments	= imx_dsp_rproc_elf_load_segments,
 	.parse_fw	= imx_dsp_rproc_parse_fw,
 	.find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
 	.sanity_check	= rproc_elf_sanity_check,
diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index 800015ff7ff9..f45b3207f7e9 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -681,7 +681,7 @@ static const struct rproc_ops imx_rproc_ops = {
 	.stop		= imx_rproc_stop,
 	.kick		= imx_rproc_kick,
 	.da_to_va       = imx_rproc_da_to_va,
-	.load		= rproc_elf_load_segments,
+	.load_segments	= rproc_elf_load_segments,
 	.parse_fw	= imx_rproc_parse_fw,
 	.find_loaded_rsc_table = imx_rproc_elf_find_loaded_rsc_table,
 	.get_loaded_rsc_table = imx_rproc_get_loaded_rsc_table,
diff --git a/drivers/remoteproc/meson_mx_ao_arc.c b/drivers/remoteproc/meson_mx_ao_arc.c
index f6744b538323..a1c8c0929ce3 100644
--- a/drivers/remoteproc/meson_mx_ao_arc.c
+++ b/drivers/remoteproc/meson_mx_ao_arc.c
@@ -137,7 +137,7 @@ static struct rproc_ops meson_mx_ao_arc_rproc_ops = {
 	.stop		= meson_mx_ao_arc_rproc_stop,
 	.da_to_va	= meson_mx_ao_arc_rproc_da_to_va,
 	.get_boot_addr	= rproc_elf_get_boot_addr,
-	.load		= rproc_elf_load_segments,
+	.load_segments	= rproc_elf_load_segments,
 	.sanity_check	= rproc_elf_sanity_check,
 };
 
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index e744c07507ee..4e9a8bf3bc6e 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -924,7 +924,7 @@ static int scp_stop(struct rproc *rproc)
 static const struct rproc_ops scp_ops = {
 	.start		= scp_start,
 	.stop		= scp_stop,
-	.load		= scp_load,
+	.load_segments	= scp_load,
 	.da_to_va	= scp_da_to_va,
 	.parse_fw	= scp_parse_fw,
 	.sanity_check	= rproc_elf_sanity_check,
diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c
index 327f0c7ee3d6..0b2bf2574f74 100644
--- a/drivers/remoteproc/pru_rproc.c
+++ b/drivers/remoteproc/pru_rproc.c
@@ -1015,7 +1015,7 @@ static int pru_rproc_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 	/* use a custom load function to deal with PRU-specific quirks */
-	rproc->ops->load = pru_rproc_load_elf_segments;
+	rproc->ops->load_segments = pru_rproc_load_elf_segments;
 
 	/* use a custom parse function to deal with PRU-specific resources */
 	rproc->ops->parse_fw = pru_rproc_parse_fw;
diff --git a/drivers/remoteproc/qcom_q6v5_adsp.c b/drivers/remoteproc/qcom_q6v5_adsp.c
index 572dcb0f055b..aa9896930bcf 100644
--- a/drivers/remoteproc/qcom_q6v5_adsp.c
+++ b/drivers/remoteproc/qcom_q6v5_adsp.c
@@ -527,7 +527,7 @@ static const struct rproc_ops adsp_ops = {
 	.stop = adsp_stop,
 	.da_to_va = adsp_da_to_va,
 	.parse_fw = adsp_parse_firmware,
-	.load = adsp_load,
+	.load_segments = adsp_load,
 	.panic = adsp_panic,
 };
 
diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
index 2a42215ce8e0..a8beac1deabe 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -1687,7 +1687,7 @@ static const struct rproc_ops q6v5_ops = {
 	.start = q6v5_start,
 	.stop = q6v5_stop,
 	.parse_fw = qcom_q6v5_register_dump_segments,
-	.load = q6v5_load,
+	.load_segments = q6v5_load,
 	.panic = q6v5_panic,
 };
 
diff --git a/drivers/remoteproc/qcom_q6v5_pas.c b/drivers/remoteproc/qcom_q6v5_pas.c
index ef82835e98a4..9b269ce390c1 100644
--- a/drivers/remoteproc/qcom_q6v5_pas.c
+++ b/drivers/remoteproc/qcom_q6v5_pas.c
@@ -436,7 +436,7 @@ static const struct rproc_ops adsp_ops = {
 	.stop = adsp_stop,
 	.da_to_va = adsp_da_to_va,
 	.parse_fw = qcom_register_dump_segments,
-	.load = adsp_load,
+	.load_segments = adsp_load,
 	.panic = adsp_panic,
 };
 
@@ -446,7 +446,7 @@ static const struct rproc_ops adsp_minidump_ops = {
 	.stop = adsp_stop,
 	.da_to_va = adsp_da_to_va,
 	.parse_fw = qcom_register_dump_segments,
-	.load = adsp_load,
+	.load_segments = adsp_load,
 	.panic = adsp_panic,
 	.coredump = adsp_minidump,
 };
diff --git a/drivers/remoteproc/qcom_q6v5_wcss.c b/drivers/remoteproc/qcom_q6v5_wcss.c
index e913dabae992..44b5736dc8b9 100644
--- a/drivers/remoteproc/qcom_q6v5_wcss.c
+++ b/drivers/remoteproc/qcom_q6v5_wcss.c
@@ -771,7 +771,7 @@ static const struct rproc_ops q6v5_wcss_ipq8074_ops = {
 	.start = q6v5_wcss_start,
 	.stop = q6v5_wcss_stop,
 	.da_to_va = q6v5_wcss_da_to_va,
-	.load = q6v5_wcss_load,
+	.load_segments = q6v5_wcss_load,
 	.get_boot_addr = rproc_elf_get_boot_addr,
 };
 
@@ -779,7 +779,7 @@ static const struct rproc_ops q6v5_wcss_qcs404_ops = {
 	.start = q6v5_qcs404_wcss_start,
 	.stop = q6v5_wcss_stop,
 	.da_to_va = q6v5_wcss_da_to_va,
-	.load = q6v5_wcss_load,
+	.load_segments = q6v5_wcss_load,
 	.get_boot_addr = rproc_elf_get_boot_addr,
 	.parse_fw = qcom_register_dump_segments,
 };
diff --git a/drivers/remoteproc/qcom_wcnss.c b/drivers/remoteproc/qcom_wcnss.c
index a7bb9da27029..42102bc4c458 100644
--- a/drivers/remoteproc/qcom_wcnss.c
+++ b/drivers/remoteproc/qcom_wcnss.c
@@ -335,7 +335,7 @@ static const struct rproc_ops wcnss_ops = {
 	.stop = wcnss_stop,
 	.da_to_va = wcnss_da_to_va,
 	.parse_fw = qcom_register_dump_segments,
-	.load = wcnss_load,
+	.load_segments = wcnss_load,
 };
 
 static irqreturn_t wcnss_wdog_interrupt(int irq, void *dev)
diff --git a/drivers/remoteproc/rcar_rproc.c b/drivers/remoteproc/rcar_rproc.c
index cc17e8421f65..e36778fec072 100644
--- a/drivers/remoteproc/rcar_rproc.c
+++ b/drivers/remoteproc/rcar_rproc.c
@@ -142,7 +142,7 @@ static struct rproc_ops rcar_rproc_ops = {
 	.prepare	= rcar_rproc_prepare,
 	.start		= rcar_rproc_start,
 	.stop		= rcar_rproc_stop,
-	.load		= rproc_elf_load_segments,
+	.load_segments	= rproc_elf_load_segments,
 	.parse_fw	= rcar_rproc_parse_fw,
 	.find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
 	.sanity_check	= rproc_elf_sanity_check,
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 8df4b2c59bb6..e4ad024efcda 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -2485,11 +2485,11 @@ static int rproc_alloc_ops(struct rproc *rproc, const struct rproc_ops *ops)
 	if (!rproc->ops->coredump)
 		rproc->ops->coredump = rproc_coredump;
 
-	if (rproc->ops->load || rproc->ops->load_fw)
+	if (rproc->ops->load_segments || rproc->ops->load_fw)
 		return 0;
 
 	/* Default to ELF loader if no load function is specified */
-	rproc->ops->load = rproc_elf_load_segments;
+	rproc->ops->load_segments = rproc_elf_load_segments;
 	rproc->ops->parse_fw = rproc_elf_load_rsc_table;
 	rproc->ops->find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table;
 	rproc->ops->sanity_check = rproc_elf_sanity_check;
diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
index 2104ca449178..b898494600cf 100644
--- a/drivers/remoteproc/remoteproc_internal.h
+++ b/drivers/remoteproc/remoteproc_internal.h
@@ -167,8 +167,8 @@ u64 rproc_get_boot_addr(struct rproc *rproc, const struct firmware *fw)
 static inline
 int rproc_load_segments(struct rproc *rproc, const struct firmware *fw)
 {
-	if (rproc->ops->load)
-		return rproc->ops->load(rproc, fw);
+	if (rproc->ops->load_segments)
+		return rproc->ops->load_segments(rproc, fw);
 
 	return -EINVAL;
 }
diff --git a/drivers/remoteproc/st_remoteproc.c b/drivers/remoteproc/st_remoteproc.c
index 1340be9d0110..8d6b75e91531 100644
--- a/drivers/remoteproc/st_remoteproc.c
+++ b/drivers/remoteproc/st_remoteproc.c
@@ -233,7 +233,7 @@ static const struct rproc_ops st_rproc_ops = {
 	.start			= st_rproc_start,
 	.stop			= st_rproc_stop,
 	.parse_fw		= st_rproc_parse_fw,
-	.load			= rproc_elf_load_segments,
+	.load_segments		= rproc_elf_load_segments,
 	.find_loaded_rsc_table	= rproc_elf_find_loaded_rsc_table,
 	.sanity_check		= rproc_elf_sanity_check,
 	.get_boot_addr		= rproc_elf_get_boot_addr,
diff --git a/drivers/remoteproc/st_slim_rproc.c b/drivers/remoteproc/st_slim_rproc.c
index 5412beb0a692..0f91d8f1e7c7 100644
--- a/drivers/remoteproc/st_slim_rproc.c
+++ b/drivers/remoteproc/st_slim_rproc.c
@@ -201,7 +201,7 @@ static const struct rproc_ops slim_rproc_ops = {
 	.stop		= slim_rproc_stop,
 	.da_to_va       = slim_rproc_da_to_va,
 	.get_boot_addr	= rproc_elf_get_boot_addr,
-	.load		= rproc_elf_load_segments,
+	.load_segments	= rproc_elf_load_segments,
 	.sanity_check	= rproc_elf_sanity_check,
 };
 
diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
index 8c7f7950b80e..7e8ffd9fcc57 100644
--- a/drivers/remoteproc/stm32_rproc.c
+++ b/drivers/remoteproc/stm32_rproc.c
@@ -667,7 +667,7 @@ static const struct rproc_ops st_rproc_ops = {
 	.attach		= stm32_rproc_attach,
 	.detach		= stm32_rproc_detach,
 	.kick		= stm32_rproc_kick,
-	.load		= rproc_elf_load_segments,
+	.load_segments	= rproc_elf_load_segments,
 	.parse_fw	= stm32_rproc_parse_fw,
 	.find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
 	.get_loaded_rsc_table = stm32_rproc_get_loaded_rsc_table,
diff --git a/drivers/remoteproc/xlnx_r5_remoteproc.c b/drivers/remoteproc/xlnx_r5_remoteproc.c
index 5aeedeaf3c41..59cfba0a02e7 100644
--- a/drivers/remoteproc/xlnx_r5_remoteproc.c
+++ b/drivers/remoteproc/xlnx_r5_remoteproc.c
@@ -864,7 +864,7 @@ static const struct rproc_ops zynqmp_r5_rproc_ops = {
 	.unprepare	= zynqmp_r5_rproc_unprepare,
 	.start		= zynqmp_r5_rproc_start,
 	.stop		= zynqmp_r5_rproc_stop,
-	.load		= rproc_elf_load_segments,
+	.load_segments	= rproc_elf_load_segments,
 	.parse_fw	= zynqmp_r5_parse_fw,
 	.find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
 	.sanity_check	= rproc_elf_sanity_check,
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index ba6fd560f7ba..55c20424a99f 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -374,7 +374,7 @@ enum rsc_handling_status {
  * @find_loaded_rsc_table: find the loaded resource table from firmware image
  * @get_loaded_rsc_table: get resource table installed in memory
  *			  by external entity
- * @load:		load firmware to memory, where the remote processor
+ * @load_segments:	load firmware ELF segment to memory, where the remote processor
  *			expects to find it
  * @sanity_check:	sanity check the fw image
  * @get_boot_addr:	get boot address to entry point specified in firmware
@@ -402,7 +402,7 @@ struct rproc_ops {
 				struct rproc *rproc, const struct firmware *fw);
 	struct resource_table *(*get_loaded_rsc_table)(
 				struct rproc *rproc, size_t *size);
-	int (*load)(struct rproc *rproc, const struct firmware *fw);
+	int (*load_segments)(struct rproc *rproc, const struct firmware *fw);
 	int (*sanity_check)(struct rproc *rproc, const struct firmware *fw);
 	u64 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw);
 	unsigned long (*panic)(struct rproc *rproc);
-- 
2.25.1

[PATCH v15 6/8] dt-bindings: remoteproc: Add compatibility for TEE support

[Arnaud Pouliquen]

The "st,stm32mp1-m4-tee" compatible is utilized in a system configuration
where the Cortex-M4 firmware is loaded by the Trusted Execution Environment
(TEE).

For instance, this compatible is used in both the Linux and OP-TEE device
trees:
- In OP-TEE, a node is defined in the device tree with the
  "st,stm32mp1-m4-tee" compatible to support signed remoteproc firmware.
  Based on DT properties, the OP-TEE remoteproc framework is initiated to
  expose a trusted application service to authenticate and load the remote
  processor firmware provided by the Linux remoteproc framework, as well
  as to start and stop the remote processor.
- In Linux, when the compatibility is set, the Cortex-M resets should not
  be declared in the device tree. In such a configuration, the reset is
  managed by the OP-TEE remoteproc driver and is no longer accessible from
  the Linux kernel.

Associated with this new compatible, add the "st,proc-id" property to
identify the remote processor. This ID is used to define a unique ID,
common between Linux, U-Boot, and OP-TEE, to identify a coprocessor.
This ID will be used in requests to the OP-TEE remoteproc Trusted
Application to specify the remote processor.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
---
 .../bindings/remoteproc/st,stm32-rproc.yaml   | 58 ++++++++++++++++---
 1 file changed, 50 insertions(+), 8 deletions(-)

diff --git a/Documentation/devicetree/bindings/remoteproc/st,stm32-rproc.yaml b/Documentation/devicetree/bindings/remoteproc/st,stm32-rproc.yaml
index 370af61d8f28..409123cd4667 100644
--- a/Documentation/devicetree/bindings/remoteproc/st,stm32-rproc.yaml
+++ b/Documentation/devicetree/bindings/remoteproc/st,stm32-rproc.yaml
@@ -16,7 +16,12 @@ maintainers:
 
 properties:
   compatible:
-    const: st,stm32mp1-m4
+    enum:
+      - st,stm32mp1-m4
+      - st,stm32mp1-m4-tee
+    description:
+      Use "st,stm32mp1-m4" for the Cortex-M4 coprocessor management by non-secure context
+      Use "st,stm32mp1-m4-tee" for the Cortex-M4 coprocessor management by secure context
 
   reg:
     description:
@@ -43,6 +48,10 @@ properties:
           - description: The offset of the hold boot setting register
           - description: The field mask of the hold boot
 
+  st,proc-id:
+    description: remote processor identifier
+    $ref: /schemas/types.yaml#/definitions/uint32
+
   st,syscfg-tz:
     deprecated: true
     description:
@@ -142,21 +151,43 @@ properties:
 required:
   - compatible
   - reg
-  - resets
 
 allOf:
   - if:
       properties:
-        reset-names:
-          not:
-            contains:
-              const: hold_boot
+        compatible:
+          contains:
+            const: st,stm32mp1-m4
     then:
+      if:
+        properties:
+          reset-names:
+            not:
+              contains:
+                const: hold_boot
+      then:
+        required:
+          - st,syscfg-holdboot
+      else:
+        properties:
+          st,syscfg-holdboot: false
+        required:
+          - reset-names
       required:
-        - st,syscfg-holdboot
-    else:
+        - resets
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: st,stm32mp1-m4-tee
+    then:
       properties:
         st,syscfg-holdboot: false
+        reset-names: false
+        resets: false
+      required:
+        - st,proc-id
 
 additionalProperties: false
 
@@ -188,5 +219,16 @@ examples:
       st,syscfg-rsc-tbl = <&tamp 0x144 0xFFFFFFFF>;
       st,syscfg-m4-state = <&tamp 0x148 0xFFFFFFFF>;
     };
+  - |
+    #include <dt-bindings/reset/stm32mp1-resets.h>
+    m4@10000000 {
+      compatible = "st,stm32mp1-m4-tee";
+      reg = <0x10000000 0x40000>,
+            <0x30000000 0x40000>,
+            <0x38000000 0x10000>;
+      st,proc-id = <0>;
+      st,syscfg-rsc-tbl = <&tamp 0x144 0xFFFFFFFF>;
+      st,syscfg-m4-state = <&tamp 0x148 0xFFFFFFFF>;
+    };
 
 ...
-- 
2.25.1

[PATCH v15 7/8] remoteproc: stm32: Create sub-functions to request shutdown and release

[Arnaud Pouliquen]

To prepare for the support of TEE remoteproc, create sub-functions
that can be used in both cases, with and without remoteproc TEE support.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
---
 drivers/remoteproc/stm32_rproc.c | 82 +++++++++++++++++++-------------
 1 file changed, 49 insertions(+), 33 deletions(-)

diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
index 7e8ffd9fcc57..1586978c5757 100644
--- a/drivers/remoteproc/stm32_rproc.c
+++ b/drivers/remoteproc/stm32_rproc.c
@@ -209,6 +209,52 @@ static int stm32_rproc_mbox_idx(struct rproc *rproc, const unsigned char *name)
 	return -EINVAL;
 }
 
+static void stm32_rproc_request_shutdown(struct rproc *rproc)
+{
+	struct stm32_rproc *ddata = rproc->priv;
+	int err, idx;
+
+	/* Request shutdown of the remote processor */
+	if (rproc->state != RPROC_OFFLINE && rproc->state != RPROC_CRASHED) {
+		idx = stm32_rproc_mbox_idx(rproc, STM32_MBX_SHUTDOWN);
+		if (idx >= 0 && ddata->mb[idx].chan) {
+			err = mbox_send_message(ddata->mb[idx].chan, "detach");
+			if (err < 0)
+				dev_warn(&rproc->dev, "warning: remote FW shutdown without ack\n");
+		}
+	}
+}
+
+static int stm32_rproc_release(struct rproc *rproc)
+{
+	struct stm32_rproc *ddata = rproc->priv;
+	unsigned int err = 0;
+
+	/* To allow platform Standby power mode, set remote proc Deep Sleep */
+	if (ddata->pdds.map) {
+		err = regmap_update_bits(ddata->pdds.map, ddata->pdds.reg,
+					 ddata->pdds.mask, 1);
+		if (err) {
+			dev_err(&rproc->dev, "failed to set pdds\n");
+			return err;
+		}
+	}
+
+	/* Update coprocessor state to OFF if available */
+	if (ddata->m4_state.map) {
+		err = regmap_update_bits(ddata->m4_state.map,
+					 ddata->m4_state.reg,
+					 ddata->m4_state.mask,
+					 M4_STATE_OFF);
+		if (err) {
+			dev_err(&rproc->dev, "failed to set copro state\n");
+			return err;
+		}
+	}
+
+	return 0;
+}
+
 static int stm32_rproc_prepare(struct rproc *rproc)
 {
 	struct device *dev = rproc->dev.parent;
@@ -519,17 +565,9 @@ static int stm32_rproc_detach(struct rproc *rproc)
 static int stm32_rproc_stop(struct rproc *rproc)
 {
 	struct stm32_rproc *ddata = rproc->priv;
-	int err, idx;
+	int err;
 
-	/* request shutdown of the remote processor */
-	if (rproc->state != RPROC_OFFLINE && rproc->state != RPROC_CRASHED) {
-		idx = stm32_rproc_mbox_idx(rproc, STM32_MBX_SHUTDOWN);
-		if (idx >= 0 && ddata->mb[idx].chan) {
-			err = mbox_send_message(ddata->mb[idx].chan, "detach");
-			if (err < 0)
-				dev_warn(&rproc->dev, "warning: remote FW shutdown without ack\n");
-		}
-	}
+	stm32_rproc_request_shutdown(rproc);
 
 	err = stm32_rproc_set_hold_boot(rproc, true);
 	if (err)
@@ -541,29 +579,7 @@ static int stm32_rproc_stop(struct rproc *rproc)
 		return err;
 	}
 
-	/* to allow platform Standby power mode, set remote proc Deep Sleep */
-	if (ddata->pdds.map) {
-		err = regmap_update_bits(ddata->pdds.map, ddata->pdds.reg,
-					 ddata->pdds.mask, 1);
-		if (err) {
-			dev_err(&rproc->dev, "failed to set pdds\n");
-			return err;
-		}
-	}
-
-	/* update coprocessor state to OFF if available */
-	if (ddata->m4_state.map) {
-		err = regmap_update_bits(ddata->m4_state.map,
-					 ddata->m4_state.reg,
-					 ddata->m4_state.mask,
-					 M4_STATE_OFF);
-		if (err) {
-			dev_err(&rproc->dev, "failed to set copro state\n");
-			return err;
-		}
-	}
-
-	return 0;
+	return stm32_rproc_release(rproc);
 }
 
 static void stm32_rproc_kick(struct rproc *rproc, int vqid)
-- 
2.25.1

[PATCH v15 8/8] remoteproc: stm32: Add support of an OP-TEE TA to load the firmware

[Arnaud Pouliquen]

The new TEE remoteproc driver is used to manage remote firmware in a
secure, trusted context. The 'st,stm32mp1-m4-tee' compatibility is
introduced to delegate the loading of the firmware to the trusted
execution context. In such cases, the firmware should be signed and
adhere to the image format defined by the TEE.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
---
updates vs version V13:
- register load_fw() ops instead of load() to call rproc_tee_load_fw()

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
---
 drivers/remoteproc/stm32_rproc.c | 57 ++++++++++++++++++++++++++++++--
 1 file changed, 54 insertions(+), 3 deletions(-)

diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
index 1586978c5757..c155822324d8 100644
--- a/drivers/remoteproc/stm32_rproc.c
+++ b/drivers/remoteproc/stm32_rproc.c
@@ -18,6 +18,7 @@
 #include <linux/pm_wakeirq.h>
 #include <linux/regmap.h>
 #include <linux/remoteproc.h>
+#include <linux/remoteproc_tee.h>
 #include <linux/reset.h>
 #include <linux/slab.h>
 #include <linux/workqueue.h>
@@ -255,6 +256,19 @@ static int stm32_rproc_release(struct rproc *rproc)
 	return 0;
 }
 
+static int stm32_rproc_tee_stop(struct rproc *rproc)
+{
+	int err;
+
+	stm32_rproc_request_shutdown(rproc);
+
+	err = rproc_tee_stop(rproc);
+	if (err)
+		return err;
+
+	return stm32_rproc_release(rproc);
+}
+
 static int stm32_rproc_prepare(struct rproc *rproc)
 {
 	struct device *dev = rproc->dev.parent;
@@ -691,8 +705,20 @@ static const struct rproc_ops st_rproc_ops = {
 	.get_boot_addr	= rproc_elf_get_boot_addr,
 };
 
+static const struct rproc_ops st_rproc_tee_ops = {
+	.prepare	= stm32_rproc_prepare,
+	.start		= rproc_tee_start,
+	.stop		= stm32_rproc_tee_stop,
+	.kick		= stm32_rproc_kick,
+	.load_fw	= rproc_tee_load_fw,
+	.parse_fw	= rproc_tee_parse_fw,
+	.find_loaded_rsc_table = rproc_tee_find_loaded_rsc_table,
+	.release_fw	= rproc_tee_release_fw,
+};
+
 static const struct of_device_id stm32_rproc_match[] = {
 	{ .compatible = "st,stm32mp1-m4" },
+	{ .compatible = "st,stm32mp1-m4-tee" },
 	{},
 };
 MODULE_DEVICE_TABLE(of, stm32_rproc_match);
@@ -853,15 +879,36 @@ static int stm32_rproc_probe(struct platform_device *pdev)
 	struct device_node *np = dev->of_node;
 	struct rproc *rproc;
 	unsigned int state;
+	u32 proc_id;
 	int ret;
 
 	ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
 	if (ret)
 		return ret;
 
-	rproc = devm_rproc_alloc(dev, np->name, &st_rproc_ops, NULL, sizeof(*ddata));
-	if (!rproc)
-		return -ENOMEM;
+	if (of_device_is_compatible(np, "st,stm32mp1-m4-tee")) {
+		/*
+		 * Delegate the firmware management to the secure context.
+		 * The firmware loaded has to be signed.
+		 */
+		ret = of_property_read_u32(np, "st,proc-id", &proc_id);
+		if (ret) {
+			dev_err(dev, "failed to read st,rproc-id property\n");
+			return ret;
+		}
+
+		rproc = devm_rproc_alloc(dev, np->name, &st_rproc_tee_ops, NULL, sizeof(*ddata));
+		if (!rproc)
+			return -ENOMEM;
+
+		ret = rproc_tee_register(dev, rproc, proc_id);
+		if (ret)
+			return dev_err_probe(dev, ret,  "signed firmware not supported by TEE\n");
+	} else {
+		rproc = devm_rproc_alloc(dev, np->name, &st_rproc_ops, NULL, sizeof(*ddata));
+		if (!rproc)
+			return -ENOMEM;
+	}
 
 	ddata = rproc->priv;
 
@@ -913,6 +960,8 @@ static int stm32_rproc_probe(struct platform_device *pdev)
 		dev_pm_clear_wake_irq(dev);
 		device_init_wakeup(dev, false);
 	}
+	rproc_tee_unregister(rproc);
+
 	return ret;
 }
 
@@ -933,6 +982,8 @@ static void stm32_rproc_remove(struct platform_device *pdev)
 		dev_pm_clear_wake_irq(dev);
 		device_init_wakeup(dev, false);
 	}
+
+	rproc_tee_unregister(rproc);
 }
 
 static int stm32_rproc_suspend(struct device *dev)
-- 
2.25.1

Re: [PATCH v15 4/8] remoteproc: Rename load() operation to load_segments() in rproc_ops struct

[Mathieu Poirier]

On Thu, Nov 28, 2024 at 09:42:11AM +0100, Arnaud Pouliquen wrote:
> With the introduction of the load_fw() operation in the rproc_ops
> structure, we need to clarify the difference in the use of the load()
> and load_fw() ops.
> 
> The legacy load() is dedicated to loading the ELF segments into memory.
> Rename this to a more explicit name: load_segments().

This is introducing more code churn than is worth it.  Please enhance the usage
comment for ->load() as part of the previous patch and drop this one.

I am done reviewing this set.

Thanks,
Mathieu

> 
> Suggested-by: Mathieu Poirier <mathieu.poirier@linaro.org>
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
> ---
> Update vs version V14:
> Fix: Rename missing load() to load_segments() in drivers/remoteproc/pru_rproc.c.
> 
> Reported-by: kernel test robot <lkp@intel.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202411281332.Ra70nJAW-lkp@intel.com/
> 
> ---
>  drivers/remoteproc/imx_dsp_rproc.c       | 2 +-
>  drivers/remoteproc/imx_rproc.c           | 2 +-
>  drivers/remoteproc/meson_mx_ao_arc.c     | 2 +-
>  drivers/remoteproc/mtk_scp.c             | 2 +-
>  drivers/remoteproc/pru_rproc.c           | 2 +-
>  drivers/remoteproc/qcom_q6v5_adsp.c      | 2 +-
>  drivers/remoteproc/qcom_q6v5_mss.c       | 2 +-
>  drivers/remoteproc/qcom_q6v5_pas.c       | 4 ++--
>  drivers/remoteproc/qcom_q6v5_wcss.c      | 4 ++--
>  drivers/remoteproc/qcom_wcnss.c          | 2 +-
>  drivers/remoteproc/rcar_rproc.c          | 2 +-
>  drivers/remoteproc/remoteproc_core.c     | 4 ++--
>  drivers/remoteproc/remoteproc_internal.h | 4 ++--
>  drivers/remoteproc/st_remoteproc.c       | 2 +-
>  drivers/remoteproc/st_slim_rproc.c       | 2 +-
>  drivers/remoteproc/stm32_rproc.c         | 2 +-
>  drivers/remoteproc/xlnx_r5_remoteproc.c  | 2 +-
>  include/linux/remoteproc.h               | 4 ++--
>  18 files changed, 23 insertions(+), 23 deletions(-)
> 
> diff --git a/drivers/remoteproc/imx_dsp_rproc.c b/drivers/remoteproc/imx_dsp_rproc.c
> index 376187ad5754..a4a85fbce907 100644
> --- a/drivers/remoteproc/imx_dsp_rproc.c
> +++ b/drivers/remoteproc/imx_dsp_rproc.c
> @@ -934,7 +934,7 @@ static const struct rproc_ops imx_dsp_rproc_ops = {
>  	.start		= imx_dsp_rproc_start,
>  	.stop		= imx_dsp_rproc_stop,
>  	.kick		= imx_dsp_rproc_kick,
> -	.load		= imx_dsp_rproc_elf_load_segments,
> +	.load_segments	= imx_dsp_rproc_elf_load_segments,
>  	.parse_fw	= imx_dsp_rproc_parse_fw,
>  	.find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
>  	.sanity_check	= rproc_elf_sanity_check,
> diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
> index 800015ff7ff9..f45b3207f7e9 100644
> --- a/drivers/remoteproc/imx_rproc.c
> +++ b/drivers/remoteproc/imx_rproc.c
> @@ -681,7 +681,7 @@ static const struct rproc_ops imx_rproc_ops = {
>  	.stop		= imx_rproc_stop,
>  	.kick		= imx_rproc_kick,
>  	.da_to_va       = imx_rproc_da_to_va,
> -	.load		= rproc_elf_load_segments,
> +	.load_segments	= rproc_elf_load_segments,
>  	.parse_fw	= imx_rproc_parse_fw,
>  	.find_loaded_rsc_table = imx_rproc_elf_find_loaded_rsc_table,
>  	.get_loaded_rsc_table = imx_rproc_get_loaded_rsc_table,
> diff --git a/drivers/remoteproc/meson_mx_ao_arc.c b/drivers/remoteproc/meson_mx_ao_arc.c
> index f6744b538323..a1c8c0929ce3 100644
> --- a/drivers/remoteproc/meson_mx_ao_arc.c
> +++ b/drivers/remoteproc/meson_mx_ao_arc.c
> @@ -137,7 +137,7 @@ static struct rproc_ops meson_mx_ao_arc_rproc_ops = {
>  	.stop		= meson_mx_ao_arc_rproc_stop,
>  	.da_to_va	= meson_mx_ao_arc_rproc_da_to_va,
>  	.get_boot_addr	= rproc_elf_get_boot_addr,
> -	.load		= rproc_elf_load_segments,
> +	.load_segments	= rproc_elf_load_segments,
>  	.sanity_check	= rproc_elf_sanity_check,
>  };
>  
> diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
> index e744c07507ee..4e9a8bf3bc6e 100644
> --- a/drivers/remoteproc/mtk_scp.c
> +++ b/drivers/remoteproc/mtk_scp.c
> @@ -924,7 +924,7 @@ static int scp_stop(struct rproc *rproc)
>  static const struct rproc_ops scp_ops = {
>  	.start		= scp_start,
>  	.stop		= scp_stop,
> -	.load		= scp_load,
> +	.load_segments	= scp_load,
>  	.da_to_va	= scp_da_to_va,
>  	.parse_fw	= scp_parse_fw,
>  	.sanity_check	= rproc_elf_sanity_check,
> diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c
> index 327f0c7ee3d6..0b2bf2574f74 100644
> --- a/drivers/remoteproc/pru_rproc.c
> +++ b/drivers/remoteproc/pru_rproc.c
> @@ -1015,7 +1015,7 @@ static int pru_rproc_probe(struct platform_device *pdev)
>  		return -ENOMEM;
>  	}
>  	/* use a custom load function to deal with PRU-specific quirks */
> -	rproc->ops->load = pru_rproc_load_elf_segments;
> +	rproc->ops->load_segments = pru_rproc_load_elf_segments;
>  
>  	/* use a custom parse function to deal with PRU-specific resources */
>  	rproc->ops->parse_fw = pru_rproc_parse_fw;
> diff --git a/drivers/remoteproc/qcom_q6v5_adsp.c b/drivers/remoteproc/qcom_q6v5_adsp.c
> index 572dcb0f055b..aa9896930bcf 100644
> --- a/drivers/remoteproc/qcom_q6v5_adsp.c
> +++ b/drivers/remoteproc/qcom_q6v5_adsp.c
> @@ -527,7 +527,7 @@ static const struct rproc_ops adsp_ops = {
>  	.stop = adsp_stop,
>  	.da_to_va = adsp_da_to_va,
>  	.parse_fw = adsp_parse_firmware,
> -	.load = adsp_load,
> +	.load_segments = adsp_load,
>  	.panic = adsp_panic,
>  };
>  
> diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
> index 2a42215ce8e0..a8beac1deabe 100644
> --- a/drivers/remoteproc/qcom_q6v5_mss.c
> +++ b/drivers/remoteproc/qcom_q6v5_mss.c
> @@ -1687,7 +1687,7 @@ static const struct rproc_ops q6v5_ops = {
>  	.start = q6v5_start,
>  	.stop = q6v5_stop,
>  	.parse_fw = qcom_q6v5_register_dump_segments,
> -	.load = q6v5_load,
> +	.load_segments = q6v5_load,
>  	.panic = q6v5_panic,
>  };
>  
> diff --git a/drivers/remoteproc/qcom_q6v5_pas.c b/drivers/remoteproc/qcom_q6v5_pas.c
> index ef82835e98a4..9b269ce390c1 100644
> --- a/drivers/remoteproc/qcom_q6v5_pas.c
> +++ b/drivers/remoteproc/qcom_q6v5_pas.c
> @@ -436,7 +436,7 @@ static const struct rproc_ops adsp_ops = {
>  	.stop = adsp_stop,
>  	.da_to_va = adsp_da_to_va,
>  	.parse_fw = qcom_register_dump_segments,
> -	.load = adsp_load,
> +	.load_segments = adsp_load,
>  	.panic = adsp_panic,
>  };
>  
> @@ -446,7 +446,7 @@ static const struct rproc_ops adsp_minidump_ops = {
>  	.stop = adsp_stop,
>  	.da_to_va = adsp_da_to_va,
>  	.parse_fw = qcom_register_dump_segments,
> -	.load = adsp_load,
> +	.load_segments = adsp_load,
>  	.panic = adsp_panic,
>  	.coredump = adsp_minidump,
>  };
> diff --git a/drivers/remoteproc/qcom_q6v5_wcss.c b/drivers/remoteproc/qcom_q6v5_wcss.c
> index e913dabae992..44b5736dc8b9 100644
> --- a/drivers/remoteproc/qcom_q6v5_wcss.c
> +++ b/drivers/remoteproc/qcom_q6v5_wcss.c
> @@ -771,7 +771,7 @@ static const struct rproc_ops q6v5_wcss_ipq8074_ops = {
>  	.start = q6v5_wcss_start,
>  	.stop = q6v5_wcss_stop,
>  	.da_to_va = q6v5_wcss_da_to_va,
> -	.load = q6v5_wcss_load,
> +	.load_segments = q6v5_wcss_load,
>  	.get_boot_addr = rproc_elf_get_boot_addr,
>  };
>  
> @@ -779,7 +779,7 @@ static const struct rproc_ops q6v5_wcss_qcs404_ops = {
>  	.start = q6v5_qcs404_wcss_start,
>  	.stop = q6v5_wcss_stop,
>  	.da_to_va = q6v5_wcss_da_to_va,
> -	.load = q6v5_wcss_load,
> +	.load_segments = q6v5_wcss_load,
>  	.get_boot_addr = rproc_elf_get_boot_addr,
>  	.parse_fw = qcom_register_dump_segments,
>  };
> diff --git a/drivers/remoteproc/qcom_wcnss.c b/drivers/remoteproc/qcom_wcnss.c
> index a7bb9da27029..42102bc4c458 100644
> --- a/drivers/remoteproc/qcom_wcnss.c
> +++ b/drivers/remoteproc/qcom_wcnss.c
> @@ -335,7 +335,7 @@ static const struct rproc_ops wcnss_ops = {
>  	.stop = wcnss_stop,
>  	.da_to_va = wcnss_da_to_va,
>  	.parse_fw = qcom_register_dump_segments,
> -	.load = wcnss_load,
> +	.load_segments = wcnss_load,
>  };
>  
>  static irqreturn_t wcnss_wdog_interrupt(int irq, void *dev)
> diff --git a/drivers/remoteproc/rcar_rproc.c b/drivers/remoteproc/rcar_rproc.c
> index cc17e8421f65..e36778fec072 100644
> --- a/drivers/remoteproc/rcar_rproc.c
> +++ b/drivers/remoteproc/rcar_rproc.c
> @@ -142,7 +142,7 @@ static struct rproc_ops rcar_rproc_ops = {
>  	.prepare	= rcar_rproc_prepare,
>  	.start		= rcar_rproc_start,
>  	.stop		= rcar_rproc_stop,
> -	.load		= rproc_elf_load_segments,
> +	.load_segments	= rproc_elf_load_segments,
>  	.parse_fw	= rcar_rproc_parse_fw,
>  	.find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
>  	.sanity_check	= rproc_elf_sanity_check,
> diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
> index 8df4b2c59bb6..e4ad024efcda 100644
> --- a/drivers/remoteproc/remoteproc_core.c
> +++ b/drivers/remoteproc/remoteproc_core.c
> @@ -2485,11 +2485,11 @@ static int rproc_alloc_ops(struct rproc *rproc, const struct rproc_ops *ops)
>  	if (!rproc->ops->coredump)
>  		rproc->ops->coredump = rproc_coredump;
>  
> -	if (rproc->ops->load || rproc->ops->load_fw)
> +	if (rproc->ops->load_segments || rproc->ops->load_fw)
>  		return 0;
>  
>  	/* Default to ELF loader if no load function is specified */
> -	rproc->ops->load = rproc_elf_load_segments;
> +	rproc->ops->load_segments = rproc_elf_load_segments;
>  	rproc->ops->parse_fw = rproc_elf_load_rsc_table;
>  	rproc->ops->find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table;
>  	rproc->ops->sanity_check = rproc_elf_sanity_check;
> diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
> index 2104ca449178..b898494600cf 100644
> --- a/drivers/remoteproc/remoteproc_internal.h
> +++ b/drivers/remoteproc/remoteproc_internal.h
> @@ -167,8 +167,8 @@ u64 rproc_get_boot_addr(struct rproc *rproc, const struct firmware *fw)
>  static inline
>  int rproc_load_segments(struct rproc *rproc, const struct firmware *fw)
>  {
> -	if (rproc->ops->load)
> -		return rproc->ops->load(rproc, fw);
> +	if (rproc->ops->load_segments)
> +		return rproc->ops->load_segments(rproc, fw);
>  
>  	return -EINVAL;
>  }
> diff --git a/drivers/remoteproc/st_remoteproc.c b/drivers/remoteproc/st_remoteproc.c
> index 1340be9d0110..8d6b75e91531 100644
> --- a/drivers/remoteproc/st_remoteproc.c
> +++ b/drivers/remoteproc/st_remoteproc.c
> @@ -233,7 +233,7 @@ static const struct rproc_ops st_rproc_ops = {
>  	.start			= st_rproc_start,
>  	.stop			= st_rproc_stop,
>  	.parse_fw		= st_rproc_parse_fw,
> -	.load			= rproc_elf_load_segments,
> +	.load_segments		= rproc_elf_load_segments,
>  	.find_loaded_rsc_table	= rproc_elf_find_loaded_rsc_table,
>  	.sanity_check		= rproc_elf_sanity_check,
>  	.get_boot_addr		= rproc_elf_get_boot_addr,
> diff --git a/drivers/remoteproc/st_slim_rproc.c b/drivers/remoteproc/st_slim_rproc.c
> index 5412beb0a692..0f91d8f1e7c7 100644
> --- a/drivers/remoteproc/st_slim_rproc.c
> +++ b/drivers/remoteproc/st_slim_rproc.c
> @@ -201,7 +201,7 @@ static const struct rproc_ops slim_rproc_ops = {
>  	.stop		= slim_rproc_stop,
>  	.da_to_va       = slim_rproc_da_to_va,
>  	.get_boot_addr	= rproc_elf_get_boot_addr,
> -	.load		= rproc_elf_load_segments,
> +	.load_segments	= rproc_elf_load_segments,
>  	.sanity_check	= rproc_elf_sanity_check,
>  };
>  
> diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
> index 8c7f7950b80e..7e8ffd9fcc57 100644
> --- a/drivers/remoteproc/stm32_rproc.c
> +++ b/drivers/remoteproc/stm32_rproc.c
> @@ -667,7 +667,7 @@ static const struct rproc_ops st_rproc_ops = {
>  	.attach		= stm32_rproc_attach,
>  	.detach		= stm32_rproc_detach,
>  	.kick		= stm32_rproc_kick,
> -	.load		= rproc_elf_load_segments,
> +	.load_segments	= rproc_elf_load_segments,
>  	.parse_fw	= stm32_rproc_parse_fw,
>  	.find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
>  	.get_loaded_rsc_table = stm32_rproc_get_loaded_rsc_table,
> diff --git a/drivers/remoteproc/xlnx_r5_remoteproc.c b/drivers/remoteproc/xlnx_r5_remoteproc.c
> index 5aeedeaf3c41..59cfba0a02e7 100644
> --- a/drivers/remoteproc/xlnx_r5_remoteproc.c
> +++ b/drivers/remoteproc/xlnx_r5_remoteproc.c
> @@ -864,7 +864,7 @@ static const struct rproc_ops zynqmp_r5_rproc_ops = {
>  	.unprepare	= zynqmp_r5_rproc_unprepare,
>  	.start		= zynqmp_r5_rproc_start,
>  	.stop		= zynqmp_r5_rproc_stop,
> -	.load		= rproc_elf_load_segments,
> +	.load_segments	= rproc_elf_load_segments,
>  	.parse_fw	= zynqmp_r5_parse_fw,
>  	.find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
>  	.sanity_check	= rproc_elf_sanity_check,
> diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
> index ba6fd560f7ba..55c20424a99f 100644
> --- a/include/linux/remoteproc.h
> +++ b/include/linux/remoteproc.h
> @@ -374,7 +374,7 @@ enum rsc_handling_status {
>   * @find_loaded_rsc_table: find the loaded resource table from firmware image
>   * @get_loaded_rsc_table: get resource table installed in memory
>   *			  by external entity
> - * @load:		load firmware to memory, where the remote processor
> + * @load_segments:	load firmware ELF segment to memory, where the remote processor
>   *			expects to find it
>   * @sanity_check:	sanity check the fw image
>   * @get_boot_addr:	get boot address to entry point specified in firmware
> @@ -402,7 +402,7 @@ struct rproc_ops {
>  				struct rproc *rproc, const struct firmware *fw);
>  	struct resource_table *(*get_loaded_rsc_table)(
>  				struct rproc *rproc, size_t *size);
> -	int (*load)(struct rproc *rproc, const struct firmware *fw);
> +	int (*load_segments)(struct rproc *rproc, const struct firmware *fw);
>  	int (*sanity_check)(struct rproc *rproc, const struct firmware *fw);
>  	u64 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw);
>  	unsigned long (*panic)(struct rproc *rproc);
> -- 
> 2.25.1
>