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| author | Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com> | 2023-03-06 23:56:14 +0000 |
|---|---|---|
| committer | Manish V Badarkhe <manish.badarkhe@arm.com> | 2023-03-28 17:19:07 +0200 |
| commit | 45007acd46981b9f289f03b283eb53e7ba37bb67 (patch) | |
| tree | df4d289c742923fcb05a61d7fa85400272b7873d /docs/getting_started | |
| parent | cfe6a82ee87ff178e05f542f65549520cf764956 (diff) | |
| download | arm-trusted-firmware-45007acd46981b9f289f03b283eb53e7ba37bb67.tar.gz | |
feat(cpufeat): enable FEAT_SME for FEAT_STATE_CHECKED
Add support for runtime detection (ENABLE_SME_FOR_NS=2), by splitting
feat_sme_supported() 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 do SME specific setup.
Change the FVP platform default to the now supported dynamic option
(=2),so the right decision can be made by the code at runtime.
Change-Id: Ida9ccf737db5be20865b84f42b1f9587be0626ab
Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
Diffstat (limited to 'docs/getting_started')
| -rw-r--r-- | docs/getting_started/build-options.rst | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/docs/getting_started/build-options.rst b/docs/getting_started/build-options.rst index 20d88071b..4483dd424 100644 --- a/docs/getting_started/build-options.rst +++ b/docs/getting_started/build-options.rst @@ -406,14 +406,15 @@ Common build options instrumented. Enabling this option enables the ``ENABLE_PMF`` build option as well. Default is 0. -- ``ENABLE_SME_FOR_NS``: Boolean option to enable Scalable Matrix Extension +- ``ENABLE_SME_FOR_NS``: Numeric value to enable Scalable Matrix Extension (SME), SVE, and FPU/SIMD for the non-secure world only. These features share registers so are enabled together. Using this option without ENABLE_SME_FOR_SWD=1 will cause SME, SVE, and FPU/SIMD instructions in secure world to trap to EL3. SME is an optional architectural feature for AArch64 and TF-A support is experimental. At this time, this build option cannot be used on systems that have SPD=spmd/SPM_MM or ENABLE_RME, and attempting to - build with these options will fail. Default is 0. + build with these options will fail. This flag can take the values 0 to 2, to + align with the ``FEATURE_DETECTION`` mechanism. Default is 0. - ``ENABLE_SME_FOR_SWD``: Boolean option to enable the Scalable Matrix Extension for secure world use along with SVE and FPU/SIMD, ENABLE_SME_FOR_NS |