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    Subject[PATCH v6 15/17] 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: Charlie Jenkins <charlie@rivosinc.com>
    Reviewed-by: Evan Green <evan@rivosinc.com>
    ---
    Documentation/arch/riscv/hwprobe.rst | 10 ++++++++++
    1 file changed, 10 insertions(+)

    diff --git a/Documentation/arch/riscv/hwprobe.rst b/Documentation/arch/riscv/hwprobe.rst
    index b2bcc9eed9aa..b2bb305140aa 100644
    --- a/Documentation/arch/riscv/hwprobe.rst
    +++ b/Documentation/arch/riscv/hwprobe.rst
    @@ -210,3 +210,13 @@ The following keys are defined:

    * :c:macro:`RISCV_HWPROBE_KEY_ZICBOZ_BLOCK_SIZE`: An unsigned int which
    represents the size of the Zicboz block in bytes.
    +
    +* :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. ").
    --
    2.44.0


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