Unverified Commit 7fa00fd6 authored by Charlie Jenkins's avatar Charlie Jenkins Committed by Palmer Dabbelt
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riscv: hwprobe: Document thead vendor extensions and xtheadvector extension 



Document support for thead vendor extensions using the key
RISCV_HWPROBE_KEY_VENDOR_EXT_THEAD_0 and xtheadvector extension using
the key RISCV_HWPROBE_VENDOR_EXT_XTHEADVECTOR.

Signed-off-by: default avatarCharlie Jenkins <charlie@rivosinc.com>
Reviewed-by: default avatarEvan Green <evan@rivosinc.com>
Tested-by: default avatarYangyu Chen <cyy@cyyself.name>
Link: https://lore.kernel.org/r/20241113-xtheadvector-v11-11-236c22791ef9@rivosinc.com


Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent a5ea53da

Documentation/arch/riscv/hwprobe.rst

+10 −0
Original line number Diff line number Diff line
@@ -293,3 +293,13 @@ The following keys are defined: 


  * :c:macro:`RISCV_HWPROBE_MISALIGNED_VECTOR_UNSUPPORTED`: Misaligned vector accesses are

    not supported at all and will generate a misaligned address fault.



* :c:macro:`RISCV_HWPROBE_KEY_VENDOR_EXT_THEAD_0`: A bitmask containing the

  thead vendor extensions that are compatible with the

  :c:macro:`RISCV_HWPROBE_BASE_BEHAVIOR_IMA`: base system behavior.



  * T-HEAD



    * :c:macro:`RISCV_HWPROBE_VENDOR_EXT_XTHEADVECTOR`: The xtheadvector vendor

        extension is supported in the T-Head ISA extensions spec starting from

	commit a18c801634 ("Add T-Head VECTOR vendor extension. ").