[PATCH 3/5] arm64/sme: Support disabling streaming mode via ptrace on SME only systems

[Randy Dunlap]

On 8/20/25 11:29 AM, Mark Brown wrote:
> diff --git a/Documentation/arch/arm64/sve.rst b/Documentation/arch/arm64/sve.rst
> index 28152492c29c..a61c9d0efe4d 100644
> --- a/Documentation/arch/arm64/sve.rst
> +++ b/Documentation/arch/arm64/sve.rst
> @@ -402,6 +402,11 @@ The regset data starts with struct user_sve_header, containing:
>    streaming mode and any SETREGSET of NT_ARM_SSVE will enter streaming mode
>    if the target was not in streaming mode.
>  
> +* On systems that do not support SVE it is permitted to use SETREGSET to
> +  write SVE_PT_REGS_FPSIMD formatted data via NT_ARM_SVE, in this case the

s/,/;/
or
                                                 NT_ARM_SVE. In this case

> +  vector length should be specified as 0. This allows streaming mode to be
> +  disabled on systems with SME but not SVE.
> +
>  * If any register data is provided along with SVE_PT_VL_ONEXEC then the
>    registers data will be interpreted with the current vector length, not
>    the vector length configured for use on exec.

-- 
~Randy