[PATCH v9 00/10] riscv: add initial RPMI virt support

This series adds initial librpmi-backed RPMI support for the RISC-V virt
machine. It covers the optional librpmi build dependency, the RPMI
transport and Base service, virt FDT wiring, opt-in machine support,
System Reset, HSM, System Suspend, documentation, qtests and a Linux
guest smoke test.

librpmi provides the host-side RPMI service-group implementation used by
this QEMU device model. The upstream repository is available at:

  https://github.com/riscv-software-src/librpmi

The documentation patch adds librpmi build instructions, "RPMI qtest
coverage", and "RPMI firmware and guest smoke" sections to
docs/system/riscv/virt.rst.

Changes since v8:
- Series-wide:
  - Rebase on current QEMU master, commit 539bc315538a.
- [02/10] hw/misc: add RISC-V RPMI transport and Base support:
  - Update the RPMI transport shared-memory helpers for the current
    physical_memory_read()/physical_memory_write() APIs.
- [08/10] docs/system/riscv: document initial virt RPMI support:
  - Add qtest coverage documentation alongside the existing firmware and
    guest smoke test notes.

Changes since v7:
- [02/10] hw/misc: add RISC-V RPMI transport and Base support:
  - Drop the redundant internal RiscvRpmiServiceKind field from
    RiscvRpmiServiceConfig and use service_group as the single dispatch
    and FDT service identifier.
- [05/10] riscv: add RPMI system reset service:
  - Move the RiscvRpmiServiceOps table and service_group lookup
    infrastructure into this patch, so the HSM and System Suspend
    patches only add their own service entries.
- [06/10] riscv: add RPMI HSM service:
  - Build on the System Reset patch's service_group lookup
    infrastructure instead of introducing it here.

Changes since v6:
- [04/10] hw/riscv/virt: add opt-in RPMI base support:
  - When RPMI is enabled, advertise reboot and shutdown through the RPMI
    system reset service instead of the syscon reset nodes.
- [10/10] tests/functional: add initial RPMI virt guest smoke:
  - Extend the functional guest smoke test to check the RPMI reboot and
    shutdown devices reported by firmware and exercise the reboot path.

Changes since v5:
- [01/10] build: add optional librpmi dependency:
  - Fix the librpmi configure probe to check the system suspend service
    group API used by this initial series instead of the later logging
    service API.
- [04/10] hw/riscv/virt: add opt-in RPMI base support:
  - Keep later SBI MPXY/FDT stubs out of the initial no-librpmi stub
    file; those stubs now live in the later stack layer where their
    prototypes are introduced.

Changes since v4:
- [04/10] hw/riscv/virt: add opt-in RPMI base support:
  - Drop the unused machine-opaque argument from the RPMI machine
    callback API.
  - Move the no-librpmi riscv_rpmi_create() fallback out of the public
    header into a dedicated hw/misc/riscv_rpmi-stub.c file.
  - Add a matching RPMI FDT helper stub file for no-librpmi builds,
    while keeping the real rpmi-fdt.c source gated on CONFIG_RISCV_RPMI.
- [05/10] riscv: add RPMI system reset service:
  - Drop the unused machine-opaque argument from the RPMI machine
    callback API.
- [06/10] riscv: add RPMI HSM service:
  - Drop the unused machine-opaque argument from the RPMI machine
    callback API.
- [07/10] riscv: add RPMI system suspend service:
  - Drop the unused machine-opaque argument from the RPMI machine
    callback API.

Changes since v3:
- [01/10] build: add optional librpmi dependency:
  - Use "RPMI support" for librpmi-related Meson option and summary
    text.
  - Add Reviewed-by tags from Daniel Henrique Barboza and Philippe
    Mathieu-Daude.
- [02/10] hw/misc: add RISC-V RPMI transport and Base support:
  - Use the Resettable API instead of device_class_set_legacy_reset().
- [03/10] hw/riscv: add RPMI FDT helpers:
  - Gate the RPMI FDT helper source on CONFIG_RISCV_RPMI.
  - Add Reviewed-by from Daniel Henrique Barboza.
- [04/10] hw/riscv/virt: add opt-in RPMI base support:
  - Mark no-librpmi stub parameters with G_GNUC_UNUSED.
- [05/10] riscv: add RPMI system reset service:
  - Add Reviewed-by from Daniel Henrique Barboza.
- [06/10] riscv: add RPMI HSM service:
  - Add Reviewed-by from Daniel Henrique Barboza.
- [07/10] riscv: add RPMI system suspend service:
  - Add Reviewed-by from Daniel Henrique Barboza.
- [08/10] docs/system/riscv: document initial virt RPMI support:
  - Add Reviewed-by from Daniel Henrique Barboza.
- [09/10] tests/qtest: cover initial RISC-V RPMI services:
  - Add Reviewed-by from Daniel Henrique Barboza.
- [10/10] tests/functional: add initial RPMI virt guest smoke:
  - Drop the stale Ventana copyright line.

Changes since v2:
- [08/10] docs/system/riscv: document initial virt RPMI support:
  - Document how to obtain and install librpmi for QEMU builds,
    including source build steps, Debian/RPM package targets, pkg-config
    setup, and the minimum librpmi version.

Changes since v1:
- Series-wide:
  - Fold reviewer fixes into the original commits.
- [02/10] hw/misc: add RISC-V RPMI transport and Base support:
  - Move Base service configuration into the Base support commit.
- [08/10] docs/system/riscv: document initial virt RPMI support:
  - Add RPMI v1.0 Ratified context and specification references.

Subrahmanya Lingappa (10):
  build: add optional librpmi dependency
  hw/misc: add RISC-V RPMI transport and Base support
  hw/riscv: add RPMI FDT helpers
  hw/riscv/virt: add opt-in RPMI base support
  riscv: add RPMI system reset service
  riscv: add RPMI HSM service
  riscv: add RPMI system suspend service
  docs/system/riscv: document initial virt RPMI support
  tests/qtest: cover initial RISC-V RPMI services
  tests/functional: add initial RPMI virt guest smoke

 Kconfig.host                               |   3 +
 MAINTAINERS                                |   3 +
 docs/system/riscv/virt.rst                 |  80 ++
 hw/misc/Kconfig                            |   4 +
 hw/misc/meson.build                        |   6 +
 hw/misc/riscv_rpmi-stub.c                  |  16 +
 hw/misc/riscv_rpmi.c                       | 544 ++++++++++++++++
 hw/misc/riscv_rpmi_hsm.c                   | 287 +++++++++
 hw/misc/riscv_rpmi_internal.h              |  41 ++
 hw/misc/riscv_rpmi_sysreset.c              | 206 +++++++
 hw/misc/riscv_rpmi_syssusp.c               | 191 ++++++
 hw/riscv/Kconfig                           |   1 +
 hw/riscv/meson.build                       |   3 +
 hw/riscv/rpmi-fdt-stub.c                   |  37 ++
 hw/riscv/rpmi-fdt.c                        | 103 ++++
 hw/riscv/virt.c                            | 176 +++++-
 include/hw/misc/riscv_rpmi.h               | 106 ++++
 include/hw/riscv/rpmi-fdt.h                |  41 ++
 include/hw/riscv/virt.h                    |   3 +
 meson.build                                |  14 +
 meson_options.txt                          |   2 +
 scripts/meson-buildoptions.sh              |   3 +
 tests/functional/riscv64/meson.build       |   2 +
 tests/functional/riscv64/test_rpmi_virt.py | 184 ++++++
 tests/qtest/meson.build                    |   2 +
 tests/qtest/riscv-rpmi-test.c              | 684 +++++++++++++++++++++
 26 files changed, 2740 insertions(+), 2 deletions(-)
 create mode 100644 hw/misc/riscv_rpmi-stub.c
 create mode 100644 hw/misc/riscv_rpmi.c
 create mode 100644 hw/misc/riscv_rpmi_hsm.c
 create mode 100644 hw/misc/riscv_rpmi_internal.h
 create mode 100644 hw/misc/riscv_rpmi_sysreset.c
 create mode 100644 hw/misc/riscv_rpmi_syssusp.c
 create mode 100644 hw/riscv/rpmi-fdt-stub.c
 create mode 100644 hw/riscv/rpmi-fdt.c
 create mode 100644 include/hw/misc/riscv_rpmi.h
 create mode 100644 include/hw/riscv/rpmi-fdt.h
 create mode 100644 tests/functional/riscv64/test_rpmi_virt.py
 create mode 100644 tests/qtest/riscv-rpmi-test.c


base-commit: 539bc315538afe036a4b99088659aa82e3b489f2
-- 
2.43.0