[PATCH v3 0/6] Add RNMI handler infrastructure for Smrnmi extension

[Anup Patel]

On Thu, May 7, 2026 at 11:38 PM Evgeny Voevodin
<evvoevod at tenstorrent.com> wrote:
>
> This is v3 of the Smrnmi series. Based on upstream/master at commit
> 2257e9957103 ("lib: sbi_bitmap_test: add tests for bitmap_empty()").
>
> v1 thread:
> https://lore.kernel.org/opensbi/20260310183155.2186463-1-evvoevod@oss.tenstorrent.com/
>
> v2 thread:
> https://lore.kernel.org/opensbi/20260501211627.3293126-1-evvoevod@tenstorrent.com/
>
> Changes vs v2:
>
> - Split former patch 4 ("Create a spot ...") into two patches per
>   Anup's review:
>     * Patch 4 only moves sbi_platform_extensions_init() to the
>       beginning of hart_detect_features().
>     * Patch 5 moves Zkr stack-guard initialization out of fw_base.S
>       into init_coldboot() in C, drops the asm
>       __stack_chk_guard_init() helper.
>
> Testing: Verified on Whisper SW system simulator and on HW emulator.
>
> Evgeny Voevodin (6):
>   include: sbi_scratch: Add tmp1 scratch space for RNMI context saving
>   lib: sbi: Add Smrnmi extension macros for registers and bits
>   firmware: Add RNMI handler infrastructure
>   lib: sbi: hart: Move device tree features detection before trap-based
>     checks
>   lib: sbi: Move Zkr entropy initialization from fw_base.S to
>     init_coldboot
>   lib: sbi: hart: Detect and enable Smrnmi before trap-based feature
>     detection
>
>  firmware/fw_base.S           | 156 +++++++++++++++++++++++++++--------
>  include/sbi/riscv_encoding.h |  10 +++
>  include/sbi/sbi_hart.h       |   2 +
>  include/sbi/sbi_platform.h   |   8 ++
>  include/sbi/sbi_scratch.h    |  11 ++-
>  include/sbi/sbi_trap.h       |   2 +
>  lib/sbi/sbi_hart.c           |  37 +++++++--
>  lib/sbi/sbi_init.c           |  31 +++++++
>  lib/sbi/sbi_trap.c           |  39 +++++++++
>  9 files changed, 254 insertions(+), 42 deletions(-)
>
> --
> 2.43.0
>

Applied this series to the riscv/opensbi repo.

Thanks,
Anup