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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aarch64	Add support for Branch Target Identification	6 years ago
tsp.ld.S	Sanitise includes across codebase	6 years ago
tsp.mk	Add support for Branch Target Identification	6 years ago
tsp_interrupt.c	Sanitise includes across codebase	6 years ago
tsp_main.c	TSP: Enable pointer authentication support	6 years ago
tsp_private.h	Sanitise includes across codebase	6 years ago
tsp_timer.c	Correct typographical errors	6 years ago