[PATCH 0/4] firmware: arm_ffa: Move core init to platform driver probe

[Sudeep Holla <sudeep.holla@kernel.org>]

This series moves the Arm FF-A core initialisation into the driver model by
converting the core bring-up path to a platform driver probe/remove flow.

The first patch reverts the earlier rootfs_initcall change. That initcall
ordering workaround is not a proper solution and potentially conflicts with
pKVM FF-A proxy requirement.

The FF-A core is then registered as a platform driver. For now, the driver
creates a synthetic arm-ffa platform device internally to bind the driver.
This is intended as a temporary bridge until ACPI and devicetree describe
the FF-A core device or object directly, at which point the internal device
creation can be dropped.

The series also makes the synthetic core device the parent of enumerated
FF-A partition devices, keeping the FF-A device hierarchy anchored under the
core transport device.

Finally, when protected KVM is enabled, FF-A probing is deferred until pKVM
has completed initialisation. The kernel pKVM FF-A proxy must perform its
own FF-A version negotiation and setup before the normal FF-A driver starts
using the transport, so the platform driver probe path now allows the driver
core to retry once that dependency is ready.

Signed-off-by: Sudeep Holla <sudeep.holla@kernel.org>
---
Sudeep Holla (3):
      firmware: arm_ffa: Register core as a platform driver
      firmware: arm_ffa: Set the core device as FF-A device parent
      firmware: arm_ffa: Defer probe until pKVM is initialized

Yeoreum Yun (1):
      Revert "firmware: arm_ffa: Change initcall level of ffa_init() to rootfs_initcall"

 drivers/firmware/arm_ffa/bus.c    |  3 +-
 drivers/firmware/arm_ffa/common.h |  4 +--
 drivers/firmware/arm_ffa/driver.c | 64 ++++++++++++++++++++++++++++++++++-----
 drivers/firmware/arm_ffa/smccc.c  |  2 +-
 include/linux/arm_ffa.h           |  4 +--
 5 files changed, 63 insertions(+), 14 deletions(-)
---
base-commit: 917719c412c48687d4a176965d1fa35320ec457c
change-id: 20260508-b4-ffa_plat_dev-39b98bb79ae9


-- 
Regards,
Sudeep