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Diffstat (limited to 'docs/user-guide.rst')
| -rw-r--r-- | docs/user-guide.rst | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/docs/user-guide.rst b/docs/user-guide.rst index 79d660d0..04acbe7f 100644 --- a/docs/user-guide.rst +++ b/docs/user-guide.rst @@ -354,6 +354,17 @@ Common build options The default is 1 but is automatically disabled when the target architecture is AArch32. +- ``ENABLE_SVE_FOR_NS``: Boolean option to enable Scalable Vector Extension + (SVE) for the Non-secure world only. SVE is an optional architectural feature + for AArch64. Note that when SVE is enabled for the Non-secure world, access + to SIMD and floating-point functionality from the Secure world is disabled. + This is to avoid corruption of the Non-secure world data in the Z-registers + which are aliased by the SIMD and FP registers. The build option is not + compatible with the ``CTX_INCLUDE_FPREGS`` build option, and will raise an + assert on platforms where SVE is implemented and ``ENABLE_SVE_FOR_NS`` set to + 1. The default is 1 but is automatically disabled when the target + architecture is AArch32. + - ``ENABLE_STACK_PROTECTOR``: String option to enable the stack protection checks in GCC. Allowed values are "all", "strong" and "0" (default). "strong" is the recommended stack protection level if this feature is |