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| author | Andre Przywara <andre.przywara@arm.com> | 2022-11-17 16:42:09 +0000 |
|---|---|---|
| committer | Andre Przywara <andre.przywara@arm.com> | 2023-03-20 13:37:36 +0000 |
| commit | 6437a09a2db5774438fb1a95c508ed6b0a9f0ef2 (patch) | |
| tree | 831ab1562452ab1700c3e40684dd871fb4deb083 /docs/getting_started | |
| parent | 90118bb5c180198db3386c3e1f5be8e32707c2cc (diff) | |
| download | arm-trusted-firmware-6437a09a2db5774438fb1a95c508ed6b0a9f0ef2.tar.gz | |
refactor(spe): enable FEAT_SPE for FEAT_STATE_CHECKED
At the moment we only support FEAT_SPE to be either unconditionally
compiled in, or to be not supported at all.
Add support for runtime detection (ENABLE_SPE_FOR_NS=2), by splitting
is_armv8_2_feat_spe_present() into an ID register reading function and
a second function to report the support status. That function considers
both build time settings and runtime information (if needed), and is
used before we access SPE related registers.
Previously SPE was enabled unconditionally for all platforms, change
this now to the runtime detection version.
Change-Id: I830c094107ce6a398bf1f4aef7ffcb79d4f36552
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Diffstat (limited to 'docs/getting_started')
| -rw-r--r-- | docs/getting_started/build-options.rst | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/docs/getting_started/build-options.rst b/docs/getting_started/build-options.rst index 9241c3912..9415871df 100644 --- a/docs/getting_started/build-options.rst +++ b/docs/getting_started/build-options.rst @@ -428,10 +428,11 @@ Common build options handle context switching for SME, SVE, and FPU/SIMD registers to ensure that no data is leaked to non-secure world. This is experimental. Default is 0. -- ``ENABLE_SPE_FOR_NS`` : Boolean option to enable Statistical Profiling +- ``ENABLE_SPE_FOR_NS`` : Numeric value to enable Statistical Profiling extensions. This is an optional architectural feature for AArch64. - The default is 1 but is automatically disabled when the target architecture - is AArch32. + This flag can take the values 0 to 2, to align with the ``FEATURE_DETECTION`` + mechanism. The default is 2 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 |