[GIT PULL] firmware: arm_ffa: Fix for v6.18

[Sudeep Holla]

Hi ARM SoC Team,

Please pull !

Regards,
Sudeep

-->8

The following changes since commit 3a8660878839faadb4f1a6dd72c3179c1df56787:

  Linux 6.18-rc1 (2025-10-12 13:42:36 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git tags/ffa-fix-6.18

for you to fetch changes up to 11fb1a82aefa6f7fea6ac82334edb5639b9927df:

  firmware: arm_ffa: Add support for IMPDEF value in the memory access descriptor (2025-10-13 10:34:46 +0100)

----------------------------------------------------------------
Arm FF-A fix for v6.18

The FF-A driver was updated to support specification version 1.2 but omitted
support for the 16-byte implementation-defined (IMPDEF) field introduced in
FF-A v1.2 within the Endpoint Memory Access Descriptor (EMAD). This omission
breaks all memory interfaces.

This change updates the EMAD sizing and offset logic to correctly handle the
FF-A v1.2 layout while preserving backward compatibility with older versions.

----------------------------------------------------------------
Sudeep Holla (1):
      firmware: arm_ffa: Add support for IMPDEF value in the memory access descriptor

 drivers/firmware/arm_ffa/driver.c | 37 +++++++++++++++++++++++++++----------
 include/linux/arm_ffa.h           | 21 +++++++++++++++++++--
 2 files changed, 46 insertions(+), 12 deletions(-)