[all-commits] [llvm/llvm-project] bf895c: [RISCV] Bump hwprobe support to Linux 6.11 (#108578)

[Yingwei Zheng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: bf895c714e1f8a51c1e565a75acf60bf7197be51
      https://github.com/llvm/llvm-project/commit/bf895c714e1f8a51c1e565a75acf60bf7197be51
  Author: Yingwei Zheng <dtcxzyw2333 at gmail.com>
  Date:   2024-10-05 (Sat, 05 Oct 2024)

  Changed paths:
    M llvm/lib/TargetParser/Host.cpp

  Log Message:
  -----------
  [RISCV] Bump hwprobe support to Linux 6.11 (#108578)

This patch is the follow-up of
https://github.com/llvm/llvm-project/pull/94352 with some updates:
1. Add support for more extensions for `zve*`, `zimop`, `zc*`, `zcmop`
and `zawrs`.
2. Use `RISCV_HWPROBE_KEY_MISALIGNED_SCALAR_PERF` to check whether the
processor supports fast misaligned scalar memory access.
https://github.com/llvm/llvm-project/pull/108551 reminds me that the
patch
https://lore.kernel.org/all/20240809214444.3257596-1-evan@rivosinc.com/T/
has been merged. Address comment
https://github.com/llvm/llvm-project/pull/94352#discussion_r1626056015.

References:
1. constants:
https://github.com/torvalds/linux/blame/v6.11-rc7/arch/riscv/include/uapi/asm/hwprobe.h
2. https://docs.kernel.org/arch/riscv/hwprobe.html
3. Related commits:
1. `zve*` support:
https://github.com/torvalds/linux/commit/de8f8282a969d0b7342702f355886aab3b14043d
2. `zimop` support:
https://github.com/torvalds/linux/commit/36f8960de887a5e2811c5d1c0517cfa6f419c1c4
3. `zc*` support:
https://github.com/torvalds/linux/commit/0ad70db5eb21e50ed693fa274bea0346de453e29
4. `zcmop` support:
https://github.com/torvalds/linux/commit/fc078ea317cc856c1e82997da7e8fd4d6da7aa29
5. `zawrs` support:
https://github.com/torvalds/linux/commit/244c18fbf64a33d152645766a033b2935ab0acb5
6. scalar misaligned perf:
https://github.com/torvalds/linux/commit/c42e2f076769c9c1bc5f3f0aa1c2032558e76647
and
https://github.com/torvalds/linux/commit/1f5288874de776412041022607513ffac74ae1a6



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