[v2] Extend and configure PMP region count

[PATCH v2 0/2] Extend and configure PMP region count

Jay Chang posted 2 patches 6 months, 3 weeks ago

Diff against v1 v3 v4
Download series mbox

Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/qemu tags/patchew/20250425094452.17013-1-jay.chang@sifive.com

Maintainers: Palmer Dabbelt <palmer@dabbelt.com>, Alistair Francis <alistair.francis@wdc.com>, Weiwei Li <liwei1518@gmail.com>, Daniel Henrique Barboza <dbarboza@ventanamicro.com>, Liu Zhiwei <zhiwei_liu@linux.alibaba.com>

There is a newer version of this series

target/riscv/cpu.c                |  54 ++++++++++++-
target/riscv/cpu.h                |   2 +-
target/riscv/cpu_bits.h           |  60 ++++++++++++++
target/riscv/cpu_cfg_fields.h.inc |   1 +
target/riscv/csr.c                | 129 +++++++++++++++++++++++++++++-
target/riscv/machine.c            |   3 +-
target/riscv/pmp.c                |  28 ++++---
7 files changed, 261 insertions(+), 16 deletions(-)

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[PATCH v2 0/2] Extend and configure PMP region count

Posted by Jay Chang 6 months, 3 weeks ago

The first patch extends the number of PMP regions supported up to 64,
following the RISC-V Privileged Specification (version >1.12), where
RV32 can have up to 64 PMP regions configured through 16 CSRs.

The second patch makes the PMP region count configurable via a new
CPU parameter `num-pmp-regions`. This allows platforms to adjust
the number of PMP regions without relying on a fixed default value.
If unspecified, the default remains 16 to preserve compatibility.

change log: 
  V2:
  * Rebase on riscv-to-apply.next

Jay Chang (2):
  target/riscv: Extend PMP region up to 64
  target/riscv: Make PMP region count configurable

 target/riscv/cpu.c                |  54 ++++++++++++-
 target/riscv/cpu.h                |   2 +-
 target/riscv/cpu_bits.h           |  60 ++++++++++++++
 target/riscv/cpu_cfg_fields.h.inc |   1 +
 target/riscv/csr.c                | 129 +++++++++++++++++++++++++++++-
 target/riscv/machine.c            |   3 +-
 target/riscv/pmp.c                |  28 ++++---
 7 files changed, 261 insertions(+), 16 deletions(-)

-- 
2.48.1