arm-trusted-firmware

History

Jayanth Dodderi Chidanand 6a0da73647 refactor(el3-runtime): add arch-features detection mechanism This patch adds architectural features detection procedure to ensure features enabled are present in the given hardware implementation. It verifies whether the architecture build flags passed during compilation match the respective features by reading their ID registers. It reads through all the enabled feature specific ID registers at once and panics in case of mismatch(feature enabled but not implemented in PE). Feature flags are used at sections (context_management, save and restore routines of registers) during context switch. If the enabled feature flag is not supported by the PE, it causes an exception while saving or restoring the registers guarded by them. With this mechanism, the build flags are validated at an early phase prior to their usage, thereby preventing any undefined action under their control. This implementation is based on tristate approach for each feature and currently FEAT_STATE=0 and FEAT_STATE=1 are covered as part of this patch. FEAT_STATE=2 is planned for phase-2 implementation and will be taken care separately. The patch has been explicitly tested, by adding a new test_config with build config enabling majority of the features and detected all of them under FVP launched with parameters enabling v8.7 features. Note: This is an experimental procedure and the mechanism itself is guarded by a macro "FEATURE_DETECTION", which is currently being disabled by default. The "FEATURE_DETECTION" macro is documented and the platforms are encouraged to make use of this diagnostic tool by enabling this "FEATURE_DETECTION" flag explicitly and get used to its behaviour during booting before the procedure gets mandated. Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com> Change-Id: Ia23d95430fe82d417a938b672bfb5edc401b0f43		3 years ago
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aarch32	Align AARCH32 version of debug.S with AARCH64	4 years ago
aarch64	Print newline after hex address in aarch64 el3_panic function	4 years ago
backtrace	Don't return error information from console_flush	4 years ago
bl_common.c	refactor(measured-boot): avoid Measured-Boot dependency on Trusted-Boot	3 years ago
desc_image_load.c	SPMD: extract SPMC DTB header size from SPMD	5 years ago
fdt_fixup.c	feat(libfdt): also allow changing base address	3 years ago
fdt_wrappers.c	Merge "fix: libc: use long for 64-bit types on aarch64" into integration	3 years ago
fdt_wrappers.mk	build(fdt-wrappers): introduce FDT wrappers makefile	3 years ago
feat_detect.c	refactor(el3-runtime): add arch-features detection mechanism	3 years ago
image_decompress.c	Sanitise includes across codebase	6 years ago
runtime_svc.c	Remove support for the SMC Calling Convention 2.0	6 years ago
tf_crc32.c	refactor(hw_crc32): renamed hw_crc32 to tf_crc32	3 years ago
tf_log.c	feat(common/debug): add new macro ERROR_NL() to print just a newline	3 years ago
uuid.c	fix(fdt): fix OOB write in uuid parsing function	3 years ago