Re: [PATCH v2] arm64: mte: avoid TFSR related operations unless in async mode
From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2021-07-27 17:20:53
On Thu, Jul 08, 2021 at 07:35:32PM -0700, Peter Collingbourne wrote:
There is no reason to touch TFSR nor issue a DSB unless our task is in asynchronous mode. Since these operations (especially the DSB) may be expensive on certain microarchitectures, only perform them if necessary. Furthermore, stop clearing TFSR on entry because it will be cleared on exit and it is not necessary to have any particular value in TFSR between entry and exit.
Nitpick: this should be clearer that it's about TFSRE0_EL1 not the kernel's TFSR_EL1. Anyway, the patch looks fine, no need to repost. I can change the comment. Thanks. -- Catalin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel