[kvm-unit-tests PATCH v7 0/2] riscv: sbi: Add support to test HSM extension

[James Raphael Tiovalen <jamestiotio@gmail.com>]

This patch series adds support for testing all 4 functions of the HSM
extension as defined in the RISC-V SBI specification. The first patch
in version 7 of this series fixes the entry point of the HSM tests,
while the second patch adds the actual test for the HSM extension.

Based-on: https://gitlab.com/jones-drew/kvm-unit-tests/-/commits/riscv/sbi

v7:
- Addressed all of Andrew's comments.
- Fixed the entry point of the HSM tests to follow the SUSP tests.

v6:
- Rebased on top of the latest commit of the riscv/sbi branch.
- Removed unnecessary cleanup code in the HSM tests after improvements
  to the on-cpus API were made by Andrew.

v5:
- Addressed all of Andrew's comments.
- Added 2 new patches to clear on_cpu_info[cpu].func and to set the
  cpu_started mask, which are used to perform cleanup after running the
  HSM tests.
- Added some new tests to validate suspension on RV64 with the high
  bits set for suspend_type.
- Picked up the hartid_to_cpu rewrite patch from Andrew's branch.
- Moved the variables declared in riscv/sbi.c in patch 2 to group it
  together with the other HSM test variables declared in patch 5.

v4:
- Addressed all of Andrew's comments.
- Included the 2 patches from Andrew's branch that refactored some
  functions.
- Added timers to all of the waiting activities in the HSM tests.

v3:
- Addressed all of Andrew's comments.
- Split the report_prefix_pop patch into its own series.
- Added a new environment variable to specify the maximum number of
  CPUs supported by the SBI implementation.

v2:
- Addressed all of Andrew's comments.
- Added a new patch to add helper routines to clear multiple prefixes.
- Reworked the approach to test the HSM extension by using cpumask and
  on-cpus.

James Raphael Tiovalen (2):
  riscv: sbi: Fix entry point of HSM tests
  riscv: sbi: Add tests for HSM extension

 riscv/sbi-tests.h |  13 +-
 riscv/sbi-asm.S   |  33 +--
 riscv/sbi.c       | 613 ++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 642 insertions(+), 17 deletions(-)

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2.43.0