Add RPMI transport and service-group support to the RISC-V Server Platform
Reference Board. The series applies on top of the initial RPMI virt support
series and wires the board's reset, HSM, and system-suspend operations to the
same librpmi-backed implementation used by ``virt``.
The RPMI FDT service nodes are emitted as ``/soc/<service>`` siblings of the
shared-memory mailbox. Each node keeps its ``mboxes`` phandle and
service-group ID, and the server-reference qtest checks this hierarchy as a
regression.
Dependencies:
- [PATCH v14 00/10] riscv: add initial RPMI virt support.
- The server-reference board is already present in QEMU master at
74f7bf4c59e6b6d50dbc6e124d93440be8be4386.
Changes since v3:
- Rebase onto QEMU master and the initial RPMI v14 prerequisite.
- Keep the board integration and its queue sizes unchanged.
- [2/2] tests/qtest: cover server reference platform RPMI:
- Use per-machine queue sizes in the shared harness: virt uses
30 KiB queues while server-reference retains 1 KiB queues.
Derive acknowledgement offsets and ring moduli accordingly.
- Inherit resume-address coverage for RAM-backed PCs, MMIO and
unmapped rejection, and RV32 width checks on mapped high RAM.
Changes since v2:
- Rebase the server-reference integration onto QEMU master and the v13 RPMI
virt prerequisite.
- [1/2] hw/riscv: add RPMI support for server reference platform:
- Add an explicit ``rpmi=on|off`` property, defaulting to off so the
existing board remains migratable and retains its legacy reset/poweroff
device-tree nodes.
- Gate RPMI realization, reset/shutdown callbacks, and service nodes on the
property; reject explicit enablement for KVM and no-librpmi builds.
- Document the property, migration restriction, build requirements, and
both device-tree layouts.
- [2/2] tests/qtest: cover server reference platform RPMI:
- Reuse the common RPMI protocol tests and register the server-reference
machine-specific subset.
- Add checks for default/off and explicit-on machine policy,
service-node sibling placement, mailbox phandles and service IDs,
legacy syscon nodes, and migration behavior.
- Name the RPMI-off migration test as a policy-command acceptance check;
it does not restore a destination VM.
Testing:
- Both patches build individually with and without librpmi.
- RPMI/server-reference qtest after [2/2]: 30/30 subtests passed.
- Without librpmi, the default machine realizes and explicit RPMI
enablement rejects with the unsupported-build error.
- Normal and TPM Linux boots with RPMI off and on: 4/4 reach login
using the unmodified device tree.
Subrahmanya Lingappa (2):
hw/riscv: add RPMI support for server reference platform
tests/qtest: cover server reference platform RPMI
docs/system/riscv/riscv-server-ref.rst | 43 ++++
hw/riscv/Kconfig | 1 +
hw/riscv/server_platform_ref.c | 149 ++++++++++-
meson.build | 4 +
tests/qtest/riscv-rpmi-test.c | 434 +++++++++++++++++++++++++--------
5 files changed, 531 insertions(+), 100 deletions(-)
base-commit: b4296f9b36dadd701e7b9f7163f344fbb438d490
