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

[Catalin Marinas]

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 at arm.com>
> Reviewed-by: Alex Bennée <alex.bennee at linaro.org>

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