On Thu, Apr 23, 2020 at 09:56:51PM +0800, Zhenyu Ye wrote: > From: Marc Zyngier <maz@xxxxxxxxxx> > > In order to reduce the cost of TLB invalidation, the ARMv8.4 TTL > feature allows TLBs to be issued with a level allowing for quicker > invalidation. > > The TTL field indicates the level of page table walk > holding the leaf entry for the address being invalidated. > > Let's detect the feature for now. Further patches will implement > its actual usage. > > Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx> > Signed-off-by: Zhenyu Ye <yezhenyu2@xxxxxxxxxx> Reviewed-by: Catalin Marinas <catalin.marinas@xxxxxxx>
