if Marvell toolchain is available then it can be used by overriding the
c, cpp, ar, strip ``binaries`` attributes to respective Marvell
toolchain binaries in ``config/arm/arm64_cn10k_linux_gcc`` file.
+
+Environment Variables
+~~~~~~~~~~~~~~~~~~~~~
+
+* ``BPHY_INTR_MLOCK_DISABLE``
+ When defined disables memory locking in
+ BPHY environment.
+
+* ``ROC_CN10K_MBOX_TIMEOUT``, ``ROC_MBOX_TIMEOUT``
+ When set, overrides MBOX timeout by value in milli seconds.
+
+* ``ETH_SEC_IV_OVR``
+ When set, overrides outbound inline SA IV. By default IV is generated
+ by HW. Format of variable is string of comma separated one byte values as
+ for ex: "0x0, 0x10, 0x20, ..."