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| /optee_os/core/arch/arm/plat-k3/drivers/ |
| H A D | sa2ul.c | e313f4765fd0478bb66985827441411793433773 Wed Sep 13 14:18:54 UTC 2023 Kamlesh Gurudasani <kamlesh@ti.com> plat-k3: drivers: Open TRNG firewall for TIFS
On devices with PLATFORM=k3-am62x, there is only one SA2UL instance,
which is being shared between TIFS and OP-TEE.
Blocking access to TRNG from all other entities other than OP-TEE
is causing firewall exception when being accessed by TIFS.
While there are other platforms with only one sa2ul instance, on AM62x
we support low power mode, in which TIFS access TRNG while waking up
from deep sleep. On other devices, use of TRNG by TIFS is limited to
the time till OP-TEE initializes and firewalls it for other entities.
Allow access to TIFS to use SA2UL TRNG along with OP-TEE.
Signed-off-by: Kamlesh Gurudasani <kamlesh@ti.com>
Reviewed-by: Manorit Chawdhry <m-chawdhry@ti.com>
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