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| author | Boyan Karatotev <boyan.karatotev@arm.com> | 2026-02-06 16:18:46 -0600 |
|---|---|---|
| committer | Boyan Karatotev <boyan.karatotev@arm.com> | 2026-06-22 14:37:49 +0100 |
| commit | d7aa847231d6f27cb8505d2f24d45af3bb70a08c (patch) | |
| tree | e1c2d6e13a4e922860902f592ab905a722f1b860 /Makefile | |
| parent | 1ae9aeb925d3703a9068f98e37ef5a3834445a7a (diff) | |
| download | arm-trusted-firmware-d7aa847231d6f27cb8505d2f24d45af3bb70a08c.tar.gz arm-trusted-firmware-d7aa847231d6f27cb8505d2f24d45af3bb70a08c.zip | |
feat(cpufeat): add support for FEAT_BRBEv1p1
Add support for Branch Record Buffer Extension v1.1. FEAT_BRBEv1p1
introduces MDCR_EL3.{E3BREW, E3BREC} which allow for branch recording at
EL3. This patch introduces helpers to start and stop recording as well
as dumping the branch record buffer to the console.
The helpers make sure that starting and stopping branch recording saves
and restores the lower EL BRBE context. This should help prevent
security and BRBE inconsistency issues if an actual payload is running
along side this. As this is a debug feature, no calls are expected to be
committed to the repository.
Note that this feature is marked as experimental. That is because
firmware does not need to support FEAT_BRBEv1p1 for the system to be
fully functional. As such, this flag may be renamed or removed in future
iterations once a precise usage model is arrived at.
Change-Id: Ibf2f1a5e9d36f759d7b381f06103d39debe23428
Co-developed-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 2 |
1 files changed, 2 insertions, 0 deletions
@@ -665,6 +665,7 @@ $(eval $(call assert_numerics,\ CTX_INCLUDE_NEVE_REGS \ DISABLE_MTPMU \ ENABLE_BRBE_FOR_NS \ + ENABLE_FEAT_BRBEV1P1 \ ENABLE_TRBE_FOR_NS \ ENABLE_BTI \ ENABLE_PAUTH \ @@ -871,6 +872,7 @@ $(eval $(call add_defines,\ NR_OF_IMAGES_IN_FW_BANK \ PSA_FWU_SUPPORT \ PSA_FWU_METADATA_FW_STORE_DESC \ + ENABLE_FEAT_BRBEV1P1 \ ENABLE_BRBE_FOR_NS \ ENABLE_TRBE_FOR_NS \ ENABLE_SYS_REG_TRACE_FOR_NS \ |