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[v1,0/2] Handle multi-letter extensions starting with caps in riscv,isa

Message ID 20230426-satin-avenging-086d4e79a8dd@wendy
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Series Handle multi-letter extensions starting with caps in riscv,isa | expand

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Conor Dooley April 26, 2023, 10:43 a.m. UTC 
Hey,

Following on from [1] in which Yangyu reported kernel panics for a
riscv,isa string containing "rv64ima_Zifencei", as the parser got
confused by the capital letter, here's a small change to the parser to
handle invalid extensions starting with capital & the removal of some
inaccurate wording from the dt-binding.

Cheers,
Conor.

1 - https://lore.kernel.org/all/tencent_1647475C9618C390BEC601BE2CC1206D0C07@qq.com/

CC: Paul Walmsley <paul.walmsley@sifive.com>
CC: Palmer Dabbelt <palmer@dabbelt.com>
CC: Rob Herring <robh+dt@kernel.org>
CC: Krzysztof Kozlowski <krzk+dt@kernel.org>
CC: Wende Tan <twd2.me@gmail.com>
CC: Soha Jin <soha@lohu.info>
CC: Hongren Zheng <i@zenithal.me>
CC: Yangyu Chen <cyy@cyyself.name>
CC: devicetree@vger.kernel.org
CC: linux-riscv@lists.infradead.org

Conor Dooley (2):
  RISC-V: skip parsing multi-letter extensions starting with caps
  dt-bindings: riscv: drop invalid comment about riscv,isa lower-case
    reasoning

 .../devicetree/bindings/riscv/cpus.yaml         |  2 +-
 arch/riscv/kernel/cpufeature.c                  | 17 ++++++++++++++---
 2 files changed, 15 insertions(+), 4 deletions(-)