[RFC PATCH 00/11] SBI system suspend (SUSP) extension
Andrew Jones
ajones at ventanamicro.com
Fri Jan 6 03:21:58 PST 2023
This series implements the SBI system suspend support in OpenSBI
as-per the draft proposal for SBI system suspend which can be found at
https://github.com/jones-drew/riscv-sbi-doc/commit/d9e43e9a938fc3eb510e023c3f352462876f7785
The first half of the series are a few cleanups and fixes for HSM,
as system suspend makes use of some of its code and patterns. The
second half implements support for the extension and includes a patch
which allows testing to be enabled, even when low-level firmware does
not provide support. Regarding the test mode, it's currently enabled
by adding a 'system-suspend-test' DT property, but Anup has suggested
that FW_OPTION could also be used. I'm all ears for what people think
the best way to control test functionality in OpenSBI is and am happy
to switch it. To test with Linux the kernel must include the patch at
https://github.com/jones-drew/linux/commits/riscv/sbi-susp-rfc and
be built with CONFIG_SUSPEND enabled.
The patches are based on v1.2 and "treewide: Replace TRUE/FALSE
with true/false" and can also be found at
https://github.com/jones-drew/opensbi/commits/susp-rfc
Andrew Jones (11):
lib: sbi_hsm: Factor out invalid state detection
lib: sbi_hsm: Don't try to restore state on failed change
lib: sbi_hsm: Ensure errors are consistent with spec
lib: sbi_hsm: Move misplaced comment
lib: sbi_hsm: Remove unnecessary include
lib: sbi_hsm: Export some functions
lib: sbi: Add system suspend skeleton
lib: sbi: Add system_suspend_allowed domain property
lib: sbi: Implement system suspend
docs: Correct opensbi-domain property name
platform: generic: Add system suspend test
docs/domain_support.md | 15 +++-
include/sbi/sbi_domain.h | 2 +
include/sbi/sbi_ecall_interface.h | 8 +++
include/sbi/sbi_hsm.h | 4 ++
include/sbi/sbi_system.h | 18 +++++
lib/sbi/Kconfig | 4 ++
lib/sbi/objects.mk | 3 +
lib/sbi/sbi_domain.c | 4 ++
lib/sbi/sbi_ecall_hsm.c | 4 +-
lib/sbi/sbi_ecall_susp.c | 48 +++++++++++++
lib/sbi/sbi_hsm.c | 92 +++++++++++--------------
lib/sbi/sbi_system.c | 111 ++++++++++++++++++++++++++++++
lib/utils/fdt/fdt_domain.c | 7 ++
platform/generic/platform.c | 20 +++++-
14 files changed, 283 insertions(+), 57 deletions(-)
create mode 100644 lib/sbi/sbi_ecall_susp.c
--
2.39.0
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