.. contents::
+Trusted Firmware-A - version 2.1
+================================
+
+New Features
+------------
+
+- Architecture
+ - Support for ARMv8.3 pointer authentication in the normal and secure worlds
+
+ The use of pointer authentication in the normal world is enabled whenever
+ architectural support is available, without the need for additional build
+ flags.
+
+ Use of pointer authentication in the secure world remains an
+ experimental configuration at this time. Using both the ``ENABLE_PAUTH``
+ and ``CTX_INCLUDE_PAUTH_REGS`` build flags, pointer authentication can be
+ enabled in EL3 and S-EL1/0.
+
+ See the `Firmware Design`_ document for additional details on the use of
+ pointer authentication.
+
+ - Enable Data Independent Timing (DIT) in EL3, where supported
+
+- Build System
+ - Support for BL-specific build flags
+
+ - Support setting compiler target architecture based on ``ARM_ARCH_MINOR``
+ build option.
+
+ - New ``RECLAIM_INIT_CODE`` build flag:
+
+ A significant amount of the code used for the initialization of BL31 is
+ not needed again after boot time. In order to reduce the runtime memory
+ footprint, the memory used for this code can be reclaimed after
+ initialization.
+
+ Certain boot-time functions were marked with the ``__init`` attribute to
+ enable this reclamation.
+
+- CPU Support
+ - cortex-a76: Workaround for erratum 1073348
+ - cortex-a76: Workaround for erratum 1220197
+ - cortex-a76: Workaround for erratum 1130799
+
+ - cortex-a75: Workaround for erratum 790748
+ - cortex-a75: Workaround for erratum 764081
+
+ - cortex-a73: Workaround for erratum 852427
+ - cortex-a73: Workaround for erratum 855423
+
+ - cortex-a57: Workaround for erratum 817169
+ - cortex-a57: Workaround for erratum 814670
+
+ - cortex-a55: Workaround for erratum 903758
+ - cortex-a55: Workaround for erratum 846532
+ - cortex-a55: Workaround for erratum 798797
+ - cortex-a55: Workaround for erratum 778703
+ - cortex-a55: Workaround for erratum 768277
+
+ - cortex-a53: Workaround for erratum 819472
+ - cortex-a53: Workaround for erratum 824069
+ - cortex-a53: Workaround for erratum 827319
+
+ - cortex-a17: Workaround for erratum 852423
+ - cortex-a17: Workaround for erratum 852421
+
+ - cortex-a15: Workaround for erratum 816470
+ - cortex-a15: Workaround for erratum 827671
+
+- Documentation
+ - Exception Handling Framework documentation
+
+ - Library at ROM (romlib) documentation
+
+ - RAS framework documentation
+
+ - Coding Guidelines document
+
+- Drivers
+ - ccn: Add API for setting and reading node registers
+ - Adds ``ccn_read_node_reg`` function
+ - Adds ``ccn_write_node_reg`` function
+
+ - partition: Support MBR partition entries
+
+ - scmi: Add ``plat_css_get_scmi_info`` function
+
+ Adds a new API ``plat_css_get_scmi_info`` which lets the platform
+ register a platform-specific instance of ``scmi_channel_plat_info_t`` and
+ remove the default values
+
+ - tzc380: Add TZC380 TrustZone Controller driver
+
+ - tzc-dmc620: Add driver to manage the TrustZone Controller within the
+ DMC-620 Dynamic Memory Controller
+
+- Library at ROM (romlib)
+ - Add platform-specific jump table list
+
+ - Allow patching of romlib functions
+
+ This change allows patching of functions in the romlib. This can be done by
+ adding "patch" at the end of the jump table entry for the function that
+ needs to be patched in the file jmptbl.i.
+
+- Library Code
+ - Support non-LPAE-enabled MMU tables in AArch32
+
+ - mmio: Add ``mmio_clrsetbits_16`` function
+ - 16-bit variant of ``mmio_clrsetbits``
+
+ - object_pool: Add Object Pool Allocator
+ - Manages object allocation using a fixed-size static array
+ - Adds ``pool_alloc`` and ``pool_alloc_n`` functions
+ - Does not provide any functions to free allocated objects (by design)
+
+ - libc: Added ``strlcpy`` function
+
+ - libc: Import ``strrchr`` function from FreeBSD
+
+ - xlat_tables: Add support for ARMv8.4-TTST
+
+ - xlat_tables: Support mapping regions without an explicitly specified VA
+
+- Math
+ - Added softudiv macro to support software division
+
+- Memory Partitioning And Monitoring (MPAM)
+ - Enabled MPAM EL2 traps (``MPAMHCR_EL2`` and ``MPAM_EL2``)
+
+- Platforms
+ - amlogic: Add support for Meson S905 (GXBB)
+
+ - arm/fvp_ve: Add support for FVP Versatile Express platform
+
+ - arm/n1sdp: Add support for Neoverse N1 System Development platform
+
+ - arm/rde1edge: Add support for Neoverse E1 platform
+
+ - arm/rdn1edge: Add support for Neoverse N1 platform
+
+ - arm: Add support for booting directly to Linux without an intermediate
+ loader (AArch32)
+
+ - arm/juno: Enable new CPU errata workarounds for A53 and A57
+
+ - arm/juno: Add romlib support
+
+ Building a combined BL1 and ROMLIB binary file with the correct page
+ alignment is now supported on the Juno platform. When ``USE_ROMLIB`` is set
+ for Juno, it generates the combined file ``bl1_romlib.bin`` which needs to
+ be used instead of bl1.bin.
+
+ - intel/stratix: Add support for Intel Stratix 10 SoC FPGA platform
+
+ - marvell: Add support for Armada-37xx SoC platform
+
+ - nxp: Add support for i.MX8M and i.MX7 Warp7 platforms
+
+ - renesas: Add support for R-Car Gen3 platform
+
+ - xilinx: Add support for Versal ACAP platforms
+
+- Position-Independent Executable (PIE)
+
+ PIE support has initially been added to BL31. The ``ENABLE_PIE`` build flag is
+ used to enable or disable this functionality as required.
+
+- Secure Partition Manager
+ - New, SPCI-compliant SPM implementation
+
+ A new version of SPM has been implemented based on draft specifications of
+ the SPCI (Secure Partition Client Interface) and SPRT (Secure
+ Partition Runtime) specifications.
+
+ The new implementation is a prototype that is expected to undergo intensive
+ rework as the specifications change. It has basic support for multiple
+ Secure Partitions and Resource Descriptions.
+
+ The old version of SPM, based on MM (ARM Management Mode Interface
+ Specification), is still present in the codebase. A new build flag,
+ ``SPM_MM`` has been added to allow selection of the desired implementation.
+ This flag defaults to 1, selecting the MM-based implementation.
+
+- Security
+ - Spectre Variant-1 mitigations (``CVE-2017-5753``)
+
+ - Use Speculation Store Bypass Safe (SSBS) functionality where available
+
+ Provides mitigation against ``CVE-2018-19440`` (Not saving x0 to x3
+ registers can leak information from one Normal World SMC client to another)
+
+
+Changed
+-------
+
+- Build System
+ - Warning levels are now selectable with ``W=<1,2,3>``
+
+ - Removed unneeded include paths in PLAT_INCLUDES
+
+ - "Warnings as errors" (Werror) can be disabled using ``E=0``
+
+ - Support totally quiet output with ``-s`` flag
+
+ - Support passing options to checkpatch using ``CHECKPATCH_OPTS=<opts>``
+
+ - Invoke host compiler with ``HOSTCC / HOSTCCFLAGS`` instead of ``CC / CFLAGS``
+
+ - Make device tree pre-processing similar to U-boot/Linux by:
+ - Creating separate ``CPPFLAGS`` for DT preprocessing so that compiler
+ options specific to it can be accommodated.
+ - Replacing ``CPP`` with ``PP`` for DT pre-processing
+
+- CPU Support
+ - Errata report function definition is now mandatory for CPU support files
+
+ CPU operation files must now define a ``<name>_errata_report`` function to
+ print errata status. This is no longer a weak reference.
+
+- Documentation
+ - Migrated some content from GitHub wiki to ``docs/`` directory
+
+ - Security advisories now have CVE links
+
+ - Updated copyright guidelines
+
+ - Miscellaneous small fixes
+
+- Drivers
+ - console: The ``MULTI_CONSOLE_API`` framework has been rewritten in C
+ - console: Ported multi-console driver to AArch32
+
+ - gic: Remove 'lowest priority' constants
+
+ Removed ``GIC_LOWEST_SEC_PRIORITY`` and ``GIC_LOWEST_NS_PRIORITY``.
+ Platforms should define these if required, or instead determine the correct
+ priority values at runtime.
+
+ - delay_timer: Check that the Generic Timer extension is present
+
+ - mmc: Increase command reply timeout to 10 milliseconds
+
+ - mmc: Poll eMMC device status to ensure ``EXT_CSD`` command completion
+
+ - mmc: Correctly check return code from ``mmc_fill_device_info``
+
+- External Libraries
+
+ - libfdt: Upgraded from 1.4.2 to 1.4.6-9
+
+ - mbed TLS: Upgraded from 2.12 to 2.16
+
+ This change incorporates fixes for security issues that should be reviewed
+ to determine if they are relevant for software implementations using
+ Trusted Firmware-A. See the `mbed TLS releases`_ page for details on
+ changes from the 2.12 to the 2.16 release.
+
+- Library Code
+ - compiler-rt: Updated ``lshrdi3.c`` and ``int_lib.h`` with changes from
+ LLVM master branch (r345645)
+
+ - cpu: Updated macro that checks need for ``CVE-2017-5715`` mitigation
+
+ - libc: Made setjmp and longjmp C standard compliant
+
+ - libc: Allowed overriding the default libc (use ``OVERRIDE_LIBC``)
+
+ - libc: Moved setjmp and longjmp to the ``libc/`` directory
+
+- Platforms
+ - Removed Mbed TLS dependency from plat_bl_common.c
+
+ - arm: Removed unused ``ARM_MAP_BL_ROMLIB`` macro
+
+ - arm: Removed ``ARM_BOARD_OPTIMISE_MEM`` feature and build flag
+
+ - arm: Moved several components into ``drivers/`` directory
+
+ This affects the SDS, SCP, SCPI, MHU and SCMI components
+
+ - arm/juno: Increased maximum BL2 image size to ``0xF000``
+
+ This change was required to accommodate a larger ``libfdt`` library
+
+- SCMI
+ - Optimized bakery locks when hardware-assisted coherency is enabled using the
+ ``HW_ASSISTED_COHERENCY`` build flag
+
+- SDEI
+ - Added support for unconditionally resuming secure world execution after
+ SDEI event processing completes
+
+ SDEI interrupts, although targeting EL3, occur on behalf of the non-secure
+ world, and may have higher priority than secure world
+ interrupts. Therefore they might preempt secure execution and yield
+ execution to the non-secure SDEI handler. Upon completion of SDEI event
+ handling, resume secure execution if it was preempted.
+
+- Translation Tables (XLAT)
+ - Dynamically detect need for ``Common not Private (TTBRn_ELx.CnP)`` bit
+
+ Properly handle the case where ``ARMv8.2-TTCNP`` is implemented in a CPU
+ that does not implement all mandatory v8.2 features (and so must claim to
+ implement a lower architecture version).
+
+
+Resolved Issues
+---------------
+
+- Architecture
+ - Incorrect check for SSBS feature detection
+
+ - Unintentional register clobber in AArch32 reset_handler function
+
+- Build System
+ - Dependency issue during DTB image build
+
+ - Incorrect variable expansion in Arm platform makefiles
+
+ - Building on Windows with verbose mode (``V=1``) enabled is broken
+
+ - AArch32 compilation flags is missing ``$(march32-directive)``
+
+- BL-Specific Issues
+ - bl2: ``uintptr_t is not defined`` error when ``BL2_IN_XIP_MEM`` is defined
+
+ - bl2: Missing prototype warning in ``bl2_arch_setup``
+
+ - bl31: Omission of Global Offset Table (GOT) section
+
+- Code Quality Issues
+ - Multiple MISRA compliance issues
+
+ - Potential NULL pointer dereference (Coverity-detected)
+
+- Drivers
+ - mmc: Local declaration of ``scr`` variable causes a cache issue when
+ invalidating after the read DMA transfer completes
+
+ - mmc: ``ACMD41`` does not send voltage information during initialization,
+ resulting in the command being treated as a query. This prevents the
+ command from initializing the controller.
+
+ - mmc: When checking device state using ``mmc_device_state()`` there are no
+ retries attempted in the event of an error
+
+ - ccn: Incorrect Region ID calculation for RN-I nodes
+
+ - console: ``Fix MULTI_CONSOLE_API`` when used as a crash console
+
+ - partition: Improper NULL checking in gpt.c
+
+ - partition: Compilation failure in ``VERBOSE`` mode (``V=1``)
+
+- Library Code
+ - common: Incorrect check for Address Authentication support
+
+ - xlat: Fix XLAT_V1 / XLAT_V2 incompatibility
+
+ The file ``arm_xlat_tables.h`` has been renamed to ``xlat_tables_compat.h``
+ and has been moved to a common folder. This header can be used to guarantee
+ compatibility, as it includes the correct header based on
+ ``XLAT_TABLES_LIB_V2``.
+
+ - xlat: armclang unused-function warning on ``xlat_clean_dcache_range``
+
+ - xlat: Invalid ``mm_cursor`` checks in ``mmap_add`` and ``mmap_add_ctx``
+
+ - sdei: Missing ``context.h`` header
+
+- Platforms
+ - common: Missing prototype warning for ``plat_log_get_prefix``
+
+ - arm: Insufficient maximum BL33 image size
+
+ - arm: Potential memory corruption during BL2-BL31 transition
+
+ On Arm platforms, the BL2 memory can be overlaid by BL31/BL32. The memory
+ descriptors describing the list of executable images are created in BL2
+ R/W memory, which could be possibly corrupted later on by BL31/BL32 due
+ to overlay. This patch creates a reserved location in SRAM for these
+ descriptors and are copied over by BL2 before handing over to next BL
+ image.
+
+ - juno: Invalid behaviour when ``CSS_USE_SCMI_SDS_DRIVER`` is not set
+
+ In ``juno_pm.c`` the ``css_scmi_override_pm_ops`` function was used
+ regardless of whether the build flag was set. The original behaviour has
+ been restored in the case where the build flag is not set.
+
+- Tools
+ - fiptool: Incorrect UUID parsing of blob parameters
+
+ - doimage: Incorrect object rules in Makefile
+
+
+Deprecations
+------------
+
+- Common Code
+ - ``plat_crash_console_init`` function
+
+ - ``plat_crash_console_putc`` function
+
+ - ``plat_crash_console_flush`` function
+
+ - ``finish_console_register`` macro
+
+- AArch64-specific Code
+ - helpers: ``get_afflvl_shift``
+
+ - helpers: ``mpidr_mask_lower_afflvls``
+
+ - helpers: ``eret``
+
+- Secure Partition Manager (SPM)
+ - Boot-info structure
+
+
+Known Issues
+------------
+
+- Build System Issues
+ - dtb: DTB creation not supported when building on a Windows host.
+
+ This step in the build process is skipped when running on a Windows host. A
+ known issue from the 1.6 release.
+
+- Platform Issues
+ - arm/juno: System suspend from Linux does not function as documented in the
+ user guide
+
+ Following the instructions provided in the user guide document does not
+ result in the platform entering system suspend state as expected. A message
+ relating to the hdlcd driver failing to suspend will be emitted on the
+ Linux terminal.
+
+ - mediatek/mt6795: This platform does not build in this release
+
Trusted Firmware-A - version 2.0
================================
.. _OP-TEE Dispatcher: optee-dispatcher.rst
.. _tf-issue#501: https://github.com/ARM-software/tf-issues/issues/501
.. _PR#1002: https://github.com/ARM-software/arm-trusted-firmware/pull/1002#issuecomment-312650193
+.. _mbed TLS releases: https://tls.mbed.org/tech-updates/releases
+.. _Firmware Design: firmware-design.rst
projects / project / bcm63xx / atf.git / commitdiff