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-rw-r--r--meta-arm/meta-arm-bsp/recipes-bsp/trusted-firmware-a/trusted-firmware-a-corstone1000.inc11
1 files changed, 10 insertions, 1 deletions
diff --git a/meta-arm/meta-arm-bsp/recipes-bsp/trusted-firmware-a/trusted-firmware-a-corstone1000.inc b/meta-arm/meta-arm-bsp/recipes-bsp/trusted-firmware-a/trusted-firmware-a-corstone1000.inc
index ee0713718f..8673199d69 100644
--- a/meta-arm/meta-arm-bsp/recipes-bsp/trusted-firmware-a/trusted-firmware-a-corstone1000.inc
+++ b/meta-arm/meta-arm-bsp/recipes-bsp/trusted-firmware-a/trusted-firmware-a-corstone1000.inc
@@ -24,6 +24,16 @@ TFA_SPMD_SPM_AT_SEL2 = "0"
# BL2 loads BL32 (optee). So, optee needs to be built first:
DEPENDS += "optee-os"
+# Note: Regarding the build option: LOG_LEVEL.
+# There seems to be an issue when setting it
+# to 50 (LOG_LEVEL_VERBOSE), where the kernel
+# tee driver sends yielding requests to OP-TEE
+# at a faster pace than OP-TEE processes them,
+# as the processing time is consumed by logging
+# in TF-A. When this issue occurs, booting halts
+# as soon as optee driver starts initialization.
+# Therefore, it's not currently recommended to
+# set LOG_LEVEL to 50 at all.
EXTRA_OEMAKE:append = " \
ARCH=aarch64 \
TARGET_PLATFORM=${TFA_TARGET_PLATFORM} \
@@ -41,5 +51,4 @@ EXTRA_OEMAKE:append = " \
ERRATA_A35_855472=1 \
ROT_KEY=plat/arm/board/common/rotpk/arm_rotprivk_rsa.pem \
BL32=${RECIPE_SYSROOT}/${nonarch_base_libdir}/firmware/tee-pager_v2.bin \
- LOG_LEVEL=50 \
"