Re: [PATCH v1 1/6] arm64: Detect the ARMv8.4 TTL feature
From: Christoph Hellwig
Date: Tue Apr 21 2020 - 12:54:07 EST
On Fri, Apr 03, 2020 at 05:00:43PM +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.
What does "issued with a level" mean?