arm-trusted-firmware

History

Alexei Fedorov 9fc59639e6 Add support for Branch Target Identification This patch adds the functionality needed for platforms to provide Branch Target Identification (BTI) extension, introduced to AArch64 in Armv8.5-A by adding BTI instruction used to mark valid targets for indirect branches. The patch sets new GP bit [50] to the stage 1 Translation Table Block and Page entries to denote guarded EL3 code pages which will cause processor to trap instructions in protected pages trying to perform an indirect branch to any instruction other than BTI. BTI feature is selected by BRANCH_PROTECTION option which supersedes the previous ENABLE_PAUTH used for Armv8.3-A Pointer Authentication and is disabled by default. Enabling BTI requires compiler support and was tested with GCC versions 9.0.0, 9.0.1 and 10.0.0. The assembly macros and helpers are modified to accommodate the BTI instruction. This is an experimental feature. Note. The previous ENABLE_PAUTH build option to enable PAuth in EL3 is now made as an internal flag and BRANCH_PROTECTION flag should be used instead to enable Pointer Authentication. Note. USE_LIBROM=1 option is currently not supported. Change-Id: Ifaf4438609b16647dc79468b70cd1f47a623362e Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>		6 years ago
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tbbr	Build: remove third argument of CERT_ADD_CMD_OPT	7 years ago
armv7-a-cpus.mk	plat/arm: Support for Cortex A5 in FVP Versatile Express platform	6 years ago
build_env.mk	Use SPDX license identifiers	8 years ago
build_macros.mk	build_macros: Add mechanism to prevent bin generation.	6 years ago
cygwin.mk	Use SPDX license identifiers	8 years ago
defaults.mk	Add support for Branch Target Identification	6 years ago
msys.mk	Use SPDX license identifiers	8 years ago
plat_helpers.mk	Change PLATFORM_ROOT to TF_PLATFORM_ROOT	7 years ago
unix.mk	Makefile: Fix verbose builds on Windows	6 years ago
windows.mk	Makefile: Fix verbose builds on Windows	6 years ago