Hi, Gentle ping: This serie has been fully reviewed by Jens and would need a maintainer ack or review.
Cheers Bertrand > On 15 Dec 2025, at 15:49, Bertrand Marquis <[email protected]> wrote: > > This series updates Xen’s FF-A mediator on Arm to implement the FF-A > v1.2 interface while keeping existing v1.0/v1.1 guests working. > > Patches 1–7 rework the low-level plumbing: > > 1) add the FF-A v1.2 function IDs and probe the new ABIs > 2) track per-VM FFA_VERSION state and enforce negotiation > 3) Fix is_64bit initialisation > 4) harden RX/TX mapping and validation > 5) rework SPMC RX/TX buffer management so access is serialized and > RX buffers are always released back to the SPMC > 6) rework VM RX/TX buffer to have generic acquire/release function > equivalent to SPMC access functions > 7) switch the mediator to spec-compliant signed 32-bit status codes > > Patches 8–11 update the data structures and direct-call paths: > > 8) add ffa_uuid helpers and rework partition-info handling > 9) add FFA_RUN support > 10) add the v1.1/v1.2 SEND2 header layout > 11) add MSG_SEND_DIRECT_REQ2/RESP2 support and marshal the extended > register set for v1.2 guests > > Patch 12 tightens the dispatcher and advertises FF-A v1.2: > > - reject SMCCC64 calls from AArch32 guests > - expose RX/TX capacity fields > - bump Xen's FF-A version to 1.2 once the implementation is complete > > v1.0/v1.1 guests continue to use the v1.1 ABI without behaviour changes, > while v1.2 guests can negotiate the wider ABI and use RUN, SEND2, and > DIRECT_REQ2/RESP2 with the extended register set. > > This serie was validated through gitlab-ci here: > https://gitlab.com/xen-project/people/bmarquis/xen-ffa-research/-/tree/ffa-v1.2/v2 > Build pipeline for the serie: > https://gitlab.com/xen-project/people/bmarquis/xen-ffa-research/-/pipelines/2215466965 > > Changes since v1: > - Rebase on staging > - Remove invalid ASSERT in patch 5 > - Add extra comment to use ACCESS_ONCE for guest_vers in patch 2 > - Add Jens R-b in other patches > > Changes since v0: > - Rework version negotiation to prevent concurrency issues > - Introduce patch 3 to fix an init bug > - Introduce patch 5 to make VM RX/TX buffer acquire/release working in > the same way as SPMC RX/TX buffers > - minor fixes described in each patch changelog > > > Bertrand Marquis (12): > xen/arm: ffa: add FF-A v1.2 function IDs > xen/arm: ffa: per-VM FFA_VERSION negotiation state > xen/arm: ffa: Fix is_64bit init > xen/arm: ffa: harden RX/TX mapping > xen/arm: ffa: rework SPMC RX/TX buffer management > xen/arm: ffa: rework VM RX/TX buffer management > xen/arm: ffa: use signed 32-bit status codes > xen/arm: ffa: add UUID helpers for partition info > xen/arm: ffa: Add FFA_RUN support > xen/arm: ffa: add v1.2 SEND2 header layout > xen/arm: ffa: add MSG_SEND_DIRECT_REQ2 support > xen/arm: ffa: advertise FF-A v1.2 > > xen/arch/arm/include/asm/tee/ffa.h | 3 +- > xen/arch/arm/tee/ffa.c | 202 ++++++++++++++++------ > xen/arch/arm/tee/ffa_msg.c | 232 +++++++++++++++++++------ > xen/arch/arm/tee/ffa_notif.c | 14 +- > xen/arch/arm/tee/ffa_partinfo.c | 263 +++++++++++++++++------------ > xen/arch/arm/tee/ffa_private.h | 154 +++++++++++------ > xen/arch/arm/tee/ffa_rxtx.c | 237 +++++++++++++++++++++----- > xen/arch/arm/tee/ffa_shm.c | 52 +++--- > 8 files changed, 827 insertions(+), 330 deletions(-) > > -- > 2.51.2 > >
