Hello Mathieu,
On 9/13/24 18:03, Mathieu Poirier wrote:
On Fri, Aug 30, 2024 at 11:51:47AM +0200, Arnaud Pouliquen wrote:
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
drivers/remoteproc/stm32_rproc.c | 63 ++++++++++++++++++++++++++++++-- 1 file changed, 60 insertions(+), 3 deletions(-)
diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c index 79c638936163..400a7a93b1c9 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> @@ -257,6 +258,19 @@ 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 = tee_rproc_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; @@ -693,8 +707,20 @@ 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 = tee_rproc_start,
- .stop = stm32_rproc_tee_stop,
- .kick = stm32_rproc_kick,
- .load = tee_rproc_load_fw,
- .parse_fw = tee_rproc_parse_fw,
- .find_loaded_rsc_table = tee_rproc_find_loaded_rsc_table,
+};
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); @@ -853,17 +879,42 @@ static int stm32_rproc_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct stm32_rproc *ddata; struct device_node *np = dev->of_node;
- struct tee_rproc *trproc = NULL; 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;trproc = tee_rproc_register(dev, rproc, proc_id);if (IS_ERR(trproc)) {dev_err_probe(dev, PTR_ERR(trproc),"signed firmware not supported by TEE\n");return PTR_ERR(trproc);}- } else {
rproc = devm_rproc_alloc(dev, np->name, &st_rproc_ops, NULL, sizeof(*ddata));if (!rproc)return -ENOMEM;- }
ddata = rproc->priv; @@ -915,6 +966,9 @@ static int stm32_rproc_probe(struct platform_device *pdev) dev_pm_clear_wake_irq(dev); device_init_wakeup(dev, false); }
- if (trproc)
if (rproc->tee_interface)I am done reviewing this set.
Thanks for the review, I will sent a V10 ASAP to fix this set. Extra information: the OP-TEE that introduces the new PTA_REMOTEPROC_RELEASE command has been merged.
Regards, Arnaud
tee_rproc_unregister(trproc);- return ret;
} @@ -935,6 +989,9 @@ static void stm32_rproc_remove(struct platform_device *pdev) dev_pm_clear_wake_irq(dev); device_init_wakeup(dev, false); }
- if (rproc->tee_interface)
tee_rproc_unregister(rproc->tee_interface);} static int stm32_rproc_suspend(struct device *dev) -- 2.25.1