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| author | Mark Brown <broonie@kernel.org> | 2023-03-14 21:33:04 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-04-18 12:36:52 +0100 |
| commit | 688ab57b9349adb19277d88f2469ceeadb8ba083 (patch) | |
| tree | 062101095883b1045695d91d53c87c1de8fa2bc7 /make_helpers | |
| parent | ffc56bd02d66b524193aeebdf4dea7c9dc14ca8d (diff) | |
| download | arm-trusted-firmware-688ab57b9349adb19277d88f2469ceeadb8ba083.tar.gz | |
feat(gcs): support guarded control stack
Arm v9.4 introduces support for Guarded Control Stack, providing
mitigations against some forms of RPO attacks and an efficient mechanism
for obtaining the current call stack without requiring a full stack
unwind. Enable access to this feature for EL2 and below, context
switching the newly added EL2 registers as appropriate.
Change the FVP platform to default to handling this as a dynamic option
so the right decision can be made by the code at runtime.
Signed-off-by: Mark Brown <broonie@kernel.org>
Change-Id: I691aa7c22e3547bb3abe98d96993baf18c5f0e7b
Diffstat (limited to 'make_helpers')
| -rw-r--r-- | make_helpers/defaults.mk | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/make_helpers/defaults.mk b/make_helpers/defaults.mk index 808a058b2..34a9bc6b9 100644 --- a/make_helpers/defaults.mk +++ b/make_helpers/defaults.mk @@ -188,6 +188,9 @@ ENABLE_FEAT_S2POE := 0 # Flag to enable access to Stage 1 Permission Overlay (FEAT_S1POE) ENABLE_FEAT_S1POE := 0 +# Flag to enable access to Guarded Control Stack (FEAT_GCS) +ENABLE_FEAT_GCS := 0 + # By default BL31 encryption disabled ENCRYPT_BL31 := 0 |