[PATCH v2 14/15] of: base: register optional OP-TEE overlay

[Marco Felsch]

The BL32 OP-TEE binary can provide an overlay which contains all
required configurations made by the secure-os, e.g. reserved-memory
nodes, the firmware-interface (smc) and so on.

This overlay can be used to uniform the OP-TEE configuration handling
for all OF platforms. While this patch is platform agnostic, the OP-TEE
overlay handling still depends on platform and machine specific
integrations.

The previous patches added the required platform support for all
i.MX8MM/N/P SoCs, but each i.MX8MM/N/P machine need add the machine
support by itself.

Allthough only i.MX8MM/N/P platform support was added, this commit
prepare all ARMv8 platforms for the new overlay mechanism.

Signed-off-by: Marco Felsch <m.felsch at pengutronix.de>
---
 arch/arm/mach-imx/imx9.c          | 2 +-
 arch/arm/mach-rockchip/rockchip.c | 3 ++-
 drivers/of/base.c                 | 3 +++
 drivers/soc/imx/soc-imx8m.c       | 3 ++-
 4 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mach-imx/imx9.c b/arch/arm/mach-imx/imx9.c
index 25ba7e444843ea5ae817dd8103074e5a50fb48f0..ada4048d4ca07b5a2f8a5ee5ceb3e3b3ecb24af8 100644
--- a/arch/arm/mach-imx/imx9.c
+++ b/arch/arm/mach-imx/imx9.c
@@ -174,7 +174,7 @@ int imx93_init(void)
 	imx93_set_arm_clock();
 	imx93_bootsource();
 
-	if (IS_ENABLED(CONFIG_PBL_OPTEE)) {
+	if (IS_ENABLED(CONFIG_PBL_OPTEE) && !optee_overlay_registered()) {
 		static struct of_optee_fixup_data optee_fixup_data = {
 			.shm_size = OPTEE_SHM_SIZE,
 			.method = "smc",
diff --git a/arch/arm/mach-rockchip/rockchip.c b/arch/arm/mach-rockchip/rockchip.c
index 0828f0fa72a9ad2495e012a42918c4b5431652e7..6ed7802cc695a61253c937b24f5b1c2a1eea7732 100644
--- a/arch/arm/mach-rockchip/rockchip.c
+++ b/arch/arm/mach-rockchip/rockchip.c
@@ -33,7 +33,8 @@ static int rockchip_init(void)
 {
 	const struct optee_header *hdr = rk_scratch_get_optee_hdr();
 
-	if (IS_ENABLED(CONFIG_PBL_OPTEE) && optee_verify_header(hdr) == 0) {
+	if (IS_ENABLED(CONFIG_PBL_OPTEE) && !optee_overlay_registered() &&
+	    optee_verify_header(hdr) == 0) {
 		static struct of_optee_fixup_data optee_fixup_data = {
 			.shm_size = OPTEE_SHM_SIZE,
 			.method = "smc",
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 54fd458bd9a1e38e665768d911934960358b42a9..3110f377212b272ae09bb15b20803b718c734f32 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -23,6 +23,7 @@
 #include <linux/ctype.h>
 #include <linux/err.h>
 #include <pm_domain.h>
+#include <tee/optee.h>
 
 static struct device_node *root_node;
 
@@ -2133,6 +2134,8 @@ int barebox_register_fdt(const void *dtb)
 		return PTR_ERR(root);
 	}
 
+	optee_register_overlay();
+
 	return barebox_register_of(root);
 }
 
diff --git a/drivers/soc/imx/soc-imx8m.c b/drivers/soc/imx/soc-imx8m.c
index 3b83284fcbfd56d543cc300b8d42771202aa0bbb..695fc3b027ae81cc8c83cbf27aff261c0459aa8a 100644
--- a/drivers/soc/imx/soc-imx8m.c
+++ b/drivers/soc/imx/soc-imx8m.c
@@ -207,7 +207,8 @@ static int imx8_soc_imx8m_init(struct soc_device_attribute *soc_dev_attr)
 	imx_set_reset_reason(src + IMX7_SRC_SRSR, imx7_reset_reasons);
 	pr_info("%s unique ID: %s\n", cputypestr, uid);
 
-	if (IS_ENABLED(CONFIG_PBL_OPTEE) && imx8m_tzc380_is_enabled()) {
+	if (IS_ENABLED(CONFIG_PBL_OPTEE) && imx8m_tzc380_is_enabled() &&
+	    !optee_overlay_registered()) {
 		static struct of_optee_fixup_data optee_fixup_data = {
 			.shm_size = OPTEE_SHM_SIZE,
 			.method = "smc",

-- 
2.47.3