[PATCH v3 0/3] RISC-V KVM selftests improvements

[Atish Patra]

This series improves the following tests.
1. Get-reg-list : Adds vector support
2. SBI PMU test : Distinguish between different types of illegal exception

The first patch is just helper patch that adds stval support during
exception handling.

Signed-off-by: Atish Patra <atishp at rivosinc.com>
---
Changes in v3:
- Dropped the redundant macros and rv32 specific csr details. 
- Changed to vcpu_get_reg from __vcpu_get_reg based on suggestion from Drew.
- Added RB tags from Drew.
- Link to v2: https://lore.kernel.org/r/20250429-kvm_selftest_improve-v2-0-51713f91e04a@rivosinc.com

Changes in v2:
- Rebased on top of Linux 6.15-rc4
- Changed from ex_regs to pt_regs based on Drew's suggestion. 
- Dropped Anup's review on PATCH1 as it is significantly changed from last review.
- Moved the instruction decoding macros to a common header file.
- Improved the vector reg list test as per the feedback.
- Link to v1: https://lore.kernel.org/r/20250324-kvm_selftest_improve-v1-0-583620219d4f@rivosinc.com

---
Atish Patra (3):
      KVM: riscv: selftests: Align the trap information wiht pt_regs
      KVM: riscv: selftests: Decode stval to identify exact exception type
      KVM: riscv: selftests: Add vector extension tests

 .../selftests/kvm/include/riscv/processor.h        |  23 +++-
 tools/testing/selftests/kvm/lib/riscv/handlers.S   | 139 +++++++++++----------
 tools/testing/selftests/kvm/lib/riscv/processor.c  |   2 +-
 tools/testing/selftests/kvm/riscv/arch_timer.c     |   2 +-
 tools/testing/selftests/kvm/riscv/ebreak_test.c    |   2 +-
 tools/testing/selftests/kvm/riscv/get-reg-list.c   | 132 +++++++++++++++++++
 tools/testing/selftests/kvm/riscv/sbi_pmu_test.c   |  24 +++-
 7 files changed, 247 insertions(+), 77 deletions(-)
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base-commit: f15d97df5afae16f40ecef942031235d1c6ba14f
change-id: 20250324-kvm_selftest_improve-9bedb9f0a6d3
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Regards,
Atish patra