docs/getting_started/build-options.rst

35    one or more feature modifiers. This option has the form ``[no]feature+...``
37    ``-march=armvX[.Y]-a+[no]feature+...``. See compiler's documentation for the
38    list of supported feature modifiers.
229    feature as per TBBR.
236    PMU). ``FEAT_MTPMU`` is an optional feature available on Armv8.6 onwards.
256    otherwise. To use this feature, platforms will have to create the function
289    ``ENABLE_FEAT`` mechanism. This is an optional architectural feature
291    and this option can be used to enable this feature on those systems as well.
295    extension. ``FEAT_AMUv1p1`` is an optional feature available on Arm v8.6
302     cannot be used by code. This is an optional architectural feature available on v8.0
303     onwards and is a mandatory feature from v8.9 onwards.
310    an optional feature starting from Arm v9.4 and This flag can take values 0 to
316    optional feature available on Arm v8.0 onwards. This flag can take values
321    extension. This feature is supported in AArch64 state only and is an optional
322    feature available in Arm v8.0 implementations.
329    and/or watchpoints. This feature is mandatory from v8.9 and is optional
335    ``FEAT_DIT`` is a mandatory  architectural feature and is enabled from v8.4
340    Virtualization feature, allowing for access to the CNTPOFF_EL2 (Counter-timer
342    Its a mandatory architectural feature and is enabled from v8.6 and upwards.
347    Mode Register feature, allowing access to the FPMR register. FPMR register
349    feature from v9.2 and upwards. This flag can take value of 0 to 2, to align
353    feature allowing for access to the HDFGRTR_EL2 (Hypervisor Debug Fine-Grained
355    Its a mandatory architectural feature and is enabled from v8.6 and upwards.
360    (Fine Grain Traps 2) feature allowing for access to Fine-grained trap 2 registers
362    Its an optional architectural feature and is available from v8.8 and upwards.
367    Fine Grained Write Trap EL3 (FEAT_FGWTE3), a feature that allows EL3 to
371    This feature is an optional architectural feature and is available from
376       This feature currently traps access to all EL3 registers in
386    mandatory architectural feature and is enabled from v8.7 and upwards. This
392    to control the feature visibility to lower ELs by returning a sanitized value
393    based on current feature enablement status. Hypervisors are expected to
396    Default value is ``0``. This feature is EXPERIMENTAL.
399       This feature traps all lower EL accesses to Group 3 and Group 5
405    This feature is mandatory from v8.8 and enabling of FEAT_MOPS does not
414    if the platform wants to use this feature and MTE2 is enabled at ELX.
422    mandatory architectural feature and is enabled from v8.1 and upwards. This
427    extension. ``FEAT_PAUTH_LR`` is an optional feature available from Arm v9.4
428    onwards. This feature requires PAUTH to be enabled via the
433    ``FEAT_RNG`` is an optional feature available on Arm v8.5 onwards. This
438    extension. This feature is only supported in AArch64 state. This flag can
440    Default value is ``0``. ``FEAT_RNG_TRAP`` is an optional feature from
444    (Speculation Barrier) instruction ``FEAT_SB`` is an optional feature and
450    extension. ``FEAT_SEL2`` is a mandatory feature available on Arm v8.4.
455    trapping of WFE Instruction) extension. ``FEAT_TWED`` is a optional feature
465    architectural feature and is enabled from v8.1 and upwards. It can take
472    mandatory architectural feature and is enabled from v8.9 and upwards. This
511    Its an optional architectural feature and is available from v8.8 and upwards.
518    context switch them. This feature is OPTIONAL from Armv8.0 implementations
527    RCWSMASK_EL1. Its an optional architectural feature and is available from
534    The objective of this feature is to provide higher privilege software with a
536    lower privilege software. It is an optional architectural feature from v9.0
548    feature. MPAM is an optional Armv8.4 extension that enables various memory
609    extensions. This is an optional architectural feature for AArch64.
615    (SVE) for the Non-secure world only. SVE is an optional architectural feature
628    for the Secure world. SVE is an optional architectural feature for AArch64.
640    level if this feature is desired. "none" disables the stack protection. For
700    This feature is intended for testing purposes only, and is advisable to keep
726    for the Trusted Board Boot feature in the BL1 and BL2 images, to generate
841    feature. This flag can be enabled with ``TRUSTED_BOARD_BOOT`` in order to
929    default and platforms that require this feature have to enable them.
1118    Boot feature. When set to '1', BL1 and BL2 images include support to load
1209    This feature creates a library of functions to be placed in ROM and thus
1321   optional architectural feature for AArch64. This flag can take the values
1328   feature for AArch64. This flag can take the values  0 to 2, to align with the
1334   but unused). This feature is available if trace unit such as ETMv4.x, and
1335   ETE(extending ETM feature) is implemented. This flag can take the values
1356 - ``ENABLE_CONSOLE_GETC``: Boolean option to enable `getc()` feature in console
1497    for Measurement (DRTM). This feature has trust dependency on BL31 for taking
1525    superset of SVE. SME is an optional architectural feature for AArch64.
1533    architectural feature for AArch64.
1550    verification mechanism. This is a debug feature that compares the
1551    architectural features enabled through the feature specific build flags
1556    It is expected that this feature is only used for flexible platforms like
1558    that the configured feature set matches the CPU.
1564    per the `PSA Crypto API specification`_. This feature is only supported if