Re: [PATCH v3 12/28] arm64/sve: Support vector length resetting for new processes

Catalin Marinas
2017-10-11T16:16:03Z

On Tue, Oct 10, 2017 at 07:38:29PM +0100, Dave P Martin wrote:
> It's desirable to be able to reset the vector length to some sane
> default for new processes, since the new binary and its libraries
> processes may or may not be SVE-aware.
>
> This patch tracks the desired post-exec vector length (if any) in a
> new thread member sve_vl_onexec, and adds a new thread flag
> TIF_SVE_VL_INHERIT to control whether to inherit or reset the
> vector length. Currently these are inactive. Subsequent patches
> will provide the capability to configure them.
>
> Signed-off-by: Dave Martin <Dave.Martin@arm.com>
> Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>