[PATCH v4 0/6] Implement hart hotplug using HSM extension for AE350

[Yu Chien Peter Lin]

The patchset includes implementing hotplug with ATCSMU deep sleep mode
using HSM extension, introduces ATCSMU system device and some fixes.
Base on OpenSBI v1.2 and test on AE350 platform with the CPU listed below:

RV64:
* AX45MP quad-core
* AX45MP octa-core
* AX25MP quad-core

RV32:
* A45MP quad-core
* A25MP quad-core

Changes v1 -> v2:
* Drop patch for adding secondary_boot callback
* Add a PATCH4 to move ATCSMU related code to lib/utils/sys
* Include RB tags
Changes v2 -> v3:
* Refine PATCH4 (suggested by Anup [1])
  * Remove redundant headers
  * Move is_andes25() to ae350.c
  * Add "struct smu_data *smu" parameter to each smu related functions
* Refine PATCH6 (suggested by Anup [2])
  * Make FDT_RESET_ATCWDT200 depends on SYS_ATCSMU
* PATCH5 & PATCH6: Instantiate struct smu_data in ae350.c and fdt_reset_atcwdt200.c
Changes v3 -> v4
* PATCH4: Fix indentation for atcsmu.h

[1] https://lists.infradead.org/pipermail/opensbi/2023-January/004236.html
[2] https://lists.infradead.org/pipermail/opensbi/2023-January/004237.html

Yu Chien Peter Lin (6):
  docs: generic.md: fix typo of andes-ae350
  lib: sbi_hsm: handle failure when hart_stop returns SBI_ENOTSUPP
  include: types: add always inline compiler attribute
  lib: utils: atcsmu: Add Andes System Management Unit support
  platform: andes/ae350: Implement hart hotplug using HSM extension
  lib: reset/fdt_reset_atcwdt200: Use defined macros and function in
    atcsmu.h

 docs/platform/generic.md                 |  2 +-
 include/sbi/sbi_hsm.h                    |  8 +-
 include/sbi/sbi_types.h                  |  1 +
 include/sbi_utils/sys/atcsmu.h           | 59 ++++++++++++++
 lib/sbi/sbi_hsm.c                        |  7 +-
 lib/utils/reset/Kconfig                  |  1 +
 lib/utils/reset/fdt_reset_atcwdt200.c    | 21 ++---
 lib/utils/sys/Kconfig                    |  4 +
 lib/utils/sys/atcsmu.c                   | 92 ++++++++++++++++++++++
 lib/utils/sys/objects.mk                 |  1 +
 platform/generic/Kconfig                 |  1 +
 platform/generic/andes/ae350.c           | 99 ++++++++++++++++++++++++
 platform/generic/andes/objects.mk        |  2 +-
 platform/generic/andes/sleep.S           | 70 +++++++++++++++++
 platform/generic/include/andes/andes45.h | 10 +++
 15 files changed, 357 insertions(+), 21 deletions(-)
 create mode 100644 include/sbi_utils/sys/atcsmu.h
 create mode 100644 lib/utils/sys/atcsmu.c
 create mode 100644 platform/generic/andes/sleep.S
 create mode 100644 platform/generic/include/andes/andes45.h

-- 
2.34.1