+Kamlesh
On 1/17/2023 9:44 AM, Andrew Davis via lists.yoctoproject.org wrote:
On 1/17/23 12:12 AM, Dhruva Gole wrote:
commit 98506a4a07363 ("optee-os: Update SRCREV for OP-TEE TRNG in AM62X")
Disables SW PRNG => Enabling Hardware RNG. This is breaking Suspend
Resume
on AM62xx EVM variants. To fix this keep using SOFTWARE_PRNG enabled as
it was.
Cc: [email protected]
Cc: Andrew Davis <[email protected]>
Signed-off-by: Dhruva Gole <[email protected]>
---
Your subject tag is a bit off, I usually use:
--subject-prefix="meta-ti][dunfell][PATCH"
As for the patch, do we have any insight into why RNG use is causing
issues with suspend/resume? I'm not seeing any suspend/resume hooks
in the OPTEE RNG Linux driver, what all have you tried so far to
fix the issue (outside of just disabling support like here, which
should be a last resort).
Andrew, Agreed on the investigation part. Kamlesh will be investigating
this once back from vacation.
For now, this patch going to SW PRNG is unblocking LPM S/R driver
validation and would prefer to go to this , and continue to investigate
the HW RNG impact with S/R scenario.
Andrew
I haven't tested thoroughly using bitbake and built from scratch yet,
however locally in my OPTEE Repo the command I run is
...
make -j14 CROSS_COMPILE64=aarch64-none-linux-gnu- PLATFORM=k3-am62x
CFG_ARM64_core=y CFG_TEE_CORE_LOG_LEVEL=1 CFG_TEE_CORE_DEBUG=y
CFG_WITH_SOFTWARE_PRNG=y
...
and this seems to get low power mode (suspend resume) functional for
AM625 SK EVM that I am testing on.
recipes-security/optee/optee-os_%.bbappend | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/recipes-security/optee/optee-os_%.bbappend
b/recipes-security/optee/optee-os_%.bbappend
index db9064deba27..83eb9c6a20c6 100644
--- a/recipes-security/optee/optee-os_%.bbappend
+++ b/recipes-security/optee/optee-os_%.bbappend
@@ -6,8 +6,8 @@ DEPENDS_append_ti-soc = " python3-cryptography-native"
EXTRA_OEMAKE_append_k3 = "${@ 'CFG_CONSOLE_UART='+
d.getVar('OPTEE_K3_USART') if d.getVar('OPTEE_K3_USART') else ''}"
-EXTRA_OEMAKE_append_am62xx-evm = " CFG_TEE_CORE_LOG_LEVEL=1"
-EXTRA_OEMAKE_append_am62xx-lp-evm = " CFG_TEE_CORE_LOG_LEVEL=1"
+EXTRA_OEMAKE_append_am62xx-evm = " CFG_WITH_SOFTWARE_PRNG=y
CFG_TEE_CORE_LOG_LEVEL=1"
+EXTRA_OEMAKE_append_am62xx-lp-evm = " CFG_WITH_SOFTWARE_PRNG=y
CFG_TEE_CORE_LOG_LEVEL=1"
EXTRA_OEMAKE_append_am62axx-evm = " CFG_TEE_CORE_LOG_LEVEL=1"
do_compile_prepend_ti-soc() {
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