feat(lfa): introduce support for call_again for LFA_PRIME

LFA_PRIME is a single-threaded operation that is not pinned to
a specific CPU. The implementation must support calls being
issued from diffe

feat(lfa): introduce support for call_again for LFA_PRIME

LFA_PRIME is a single-threaded operation that is not pinned to
a specific CPU. The implementation must support calls being
issued from different CPUs, even for several calls to prime the
same component.

This patch checks if the plat_lfa_load_auth_image return -EAGAIN
indicating that the platform expects the LFA_PRIME call to be
issued again. This is done by returning LFA_SUCCESS and setting
flags[0] to 1, indicating that LFA_PRIME is incomplete and must
be called again.

Change-Id: Ia3046b5467c50c4c51392bac3fb9e9533f2438db
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

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feat(lfa): allow LFA_PRIME from one CPU at a time

LFA_PRIME is a single-threaded operation that is not pinned
to a specific CPU. The implementation must support calls being
issued from different CPU

feat(lfa): allow LFA_PRIME from one CPU at a time

LFA_PRIME is a single-threaded operation that is not pinned
to a specific CPU. The implementation must support calls being
issued from different CPUs, even for several calls to prime
the same component. However, those calls must not happen
concurrently.

This patch introduces a spinlock across the LFA_PRIME call to
support this requirement. In case of concurrent calls, the
LFA_BUSY error code is returned to the caller.

Change-Id: I0574a155ea66b527e26b0dd73272a103e4f936b1
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

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chore(lfa): rename component_id to lfa_component_id

Refactor the function lfa_is_prime_complete to use a more specific
parameter name, lfa_component_id, enhancing code clarity. This change
improves

chore(lfa): rename component_id to lfa_component_id

Refactor the function lfa_is_prime_complete to use a more specific
parameter name, lfa_component_id, enhancing code clarity. This change
improves readability and reduces potential confusion with other
component identifiers in the codebase.

Change-Id: I00285fce4b7149bd97d6386ef471e9d1598a3fed
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>

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fix(lfa): check error code from plat_lfa_load_auth_image

This patch checks the return values from plat_lfa_load_auth_image and
returns an LFA* error code to the caller, if required.

Change-Id: I7c1

fix(lfa): check error code from plat_lfa_load_auth_image

This patch checks the return values from plat_lfa_load_auth_image and
returns an LFA* error code to the caller, if required.

Change-Id: I7c1cad8e5f24b0e4cfdf2667adeed30c4d33bda0
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

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Merge changes from topic "lfa-plat-activate" into integration

* changes:
feat(fvp): add stub implementation for plat_lfa_notify_activate()
feat(lfa): add platform hook for activation notification

feat(lfa): add platform hook for activation notification

Introduce a new platform API, plat_lfa_notify_activate(), which allows
the platform to notify its security engine to begin component
activati

feat(lfa): add platform hook for activation notification

Introduce a new platform API, plat_lfa_notify_activate(), which allows
the platform to notify its security engine to begin component
activation. The function accepts a component identifier and should
return 0 on success or an error code on failure.

Documentation and header files are updated accordingly, and the call is
integrated into the LFA activation path.

Change-Id: Ic66aa675bba62633cc92992b965d144a6f9ef129
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>

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feat(lfa): add helper to check LFA prime completion status

Introduce `is_lfa_prime_finished()` to allow callers to query whether the
prime operation for a given component has completed. This enables

feat(lfa): add helper to check LFA prime completion status

Introduce `is_lfa_prime_finished()` to allow callers to query whether the
prime operation for a given component has completed. This enables external
logic to safely determine if activation is ready to proceed.

The helper checks for:
- Matching `component_id` in the current activation
- Prime status being `PRIME_COMPLETE`
- `activation_pending` being true

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: I55dadba639571faacc27de245cf0a9f2493956a5

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chore(lfa): use standard int return type for prime/activate callbacks

Replace `int32_t` with `int` for `component_prime_fn` and
`component_activate_fn` typedefs, along with their implementations
in

chore(lfa): use standard int return type for prime/activate callbacks

Replace `int32_t` with `int` for `component_prime_fn` and
`component_activate_fn` typedefs, along with their implementations
in BL31 and RMM LFA services. This aligns with common convention
for function return types and avoids unnecessary use of fixed-width
types where a native int is sufficient

Change-Id: Id22e93a554260b22e36b59baeac2cbb1b4646727
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>

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fix(lfa): include string.h in lfa_main.c

The memcpy function is defined in string.h header file. Since
it is used in lfa_main.c, string.h should be included.

Change-Id: I4f361c9365c4a221bcf16933902

fix(lfa): include string.h in lfa_main.c

The memcpy function is defined in string.h header file. Since
it is used in lfa_main.c, string.h should be included.

Change-Id: I4f361c9365c4a221bcf16933902eb3a980b83da7
Signed-off-by: azimmerman <azimmerman@nvidia.com>
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

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feat(lfa): add LFA holding pen logic

Add LFA holding logic to be used by the LFA activate SMC call to manage
CPU rendezvous. All CPUs are expected to invoke the LFA activate call
for the rendezvous,

feat(lfa): add LFA holding pen logic

Add LFA holding logic to be used by the LFA activate SMC call to manage
CPU rendezvous. All CPUs are expected to invoke the LFA activate call
for the rendezvous, until then, they will remain on a holding lock.
When the final CPU calls LFA activate, it will release the holding
lock after completing the activation process on that CPU, allowing
the activation process on secondary CPUs to proceed.

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: Iff9e40dd87420245fe5844e286d0685c1f0db289

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feat(lfa): add initial implementation for LFA_ACTIVATE

This patch introduces the overall handling of the LFA_ACTIVATE call,
including input validation and invocation flow.
While this covers the core

feat(lfa): add initial implementation for LFA_ACTIVATE

This patch introduces the overall handling of the LFA_ACTIVATE call,
including input validation and invocation flow.
While this covers the core implementation, per-component-specific
handling will be developed in a separate patch. The respective
component callbacks are invoked as part of this logic.

Change-Id: Ie9d4584fc0c0abc9a9faffed62165b4461efed3a
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>

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feat(lfa): add initial implementation for LFA_PRIME

This patch introduces the overall handling of the LFA_PRIME call,
including input validation and invocation flow.
While this covers the core imple

feat(lfa): add initial implementation for LFA_PRIME

This patch introduces the overall handling of the LFA_PRIME call,
including input validation and invocation flow.
While this covers the core implementation, per-component-specific
handling will be developed in a separate patch. The respective
component callbacks are invoked as part of this logic.

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: Ie13d15d0a060ae5f9704991245d2a65c7d846047

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feat(lfa): implement LFA_CANCEL SMC

Check the sanity of the arguments before proceeding
with the cancellation request, do platform specific
cancellation operation and then reset the live activation

feat(lfa): implement LFA_CANCEL SMC

Check the sanity of the arguments before proceeding
with the cancellation request, do platform specific
cancellation operation and then reset the live activation
states.

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: I3f43d03f7c7b3e6eb85b58f363b64d3c2b1dc961

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feat(lfa): implement LFA_GET_INVENTORY SMC

This implementation primarily retrieves activation-related flags for
a given fw_seq_id, including whether the firmware is activation
capable, whether an up

feat(lfa): implement LFA_GET_INVENTORY SMC

This implementation primarily retrieves activation-related flags for
a given fw_seq_id, including whether the firmware is activation
capable, whether an update is pending activation, whether it resets
the CPU during activation, whether CPU rendezvous is required, and the
firmware's UUID.
To support this, a platform API is called to determine whether an
update is available for the specified fw_seq_id, indicating its
pending activation status.

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: I6e702a8b313386f5668027386845ff2dae9328e7

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feat(lfa): implement LFA_GET_INFO SMC and integrate LFA build

Implement the LFA_GET_INFO SMC handler, which retrieves the
number of supported firmware components and performs initial
setup via the p

feat(lfa): implement LFA_GET_INFO SMC and integrate LFA build

Implement the LFA_GET_INFO SMC handler, which retrieves the
number of supported firmware components and performs initial
setup via the platform APIs. This forms the entry point for
LFA usage and makes component metadata available for later use.

Update the build system to include LFA sources.

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: I4016615a88706972eff6ea5777dda6d5a3a04074

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feat(bl31): add placeholder activator implementation for LFA

Introduce the BL31 component's activator structure with stub
implementations for the 'prime' and 'activate' callbacks.

Both callbacks cu

feat(bl31): add placeholder activator implementation for LFA

Introduce the BL31 component's activator structure with stub
implementations for the 'prime' and 'activate' callbacks.

Both callbacks currently return LFA_WRONG_STATE, indicating that
activation is not supported or allowed from BL31 in this context.

This activator is registered via get_bl31_activator(), allowing
the platform layer to wire it into the LFA framework.

Change-Id: I4279996b218d558a45cd99d5840f0e9f8ee97f90
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>

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feat(lfa): create LFA SMC handler template

As per the specification v1.0[1], added all Live Firmware Activation
(LFA) SMCs, including their Function IDs (FIDs) and associated error
codes.
A dummy ha

feat(lfa): create LFA SMC handler template

As per the specification v1.0[1], added all Live Firmware Activation
(LFA) SMCs, including their Function IDs (FIDs) and associated error
codes.
A dummy handler function has been created as a template. Subsequent
patches will implement the handling of these SMCs.

[1]: https://developer.arm.com/documentation/den0147/latest/

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: I5d6500dcff35aa4a438cd5f97f349cd57406ddce

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