From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C1056C47084 for ; Tue, 25 May 2021 14:02:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A435461423 for ; Tue, 25 May 2021 14:02:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233465AbhEYODi (ORCPT ); Tue, 25 May 2021 10:03:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:35010 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233273AbhEYODh (ORCPT ); Tue, 25 May 2021 10:03:37 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5DCB26141B; Tue, 25 May 2021 14:02:06 +0000 (UTC) From: Catalin Marinas To: Marco Elver , Jisheng Zhang , Mark Rutland , Will Deacon Cc: linux-arm-kernel@lists.infradead.org, stable@vger.kernel.org, linux-kernel@vger.kernel.org, Alexander Potapenko Subject: Re: [PATCH v2] arm64: mm: don't use CON and BLK mapping if KFENCE is enabled Date: Tue, 25 May 2021 15:02:04 +0100 Message-Id: <162195131724.26304.9816849348015861632.b4-ty@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210525104551.2ec37f77@xhacker.debian> References: <20210525104551.2ec37f77@xhacker.debian> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 25 May 2021 10:45:51 +0800, Jisheng Zhang wrote: > When we added KFENCE support for arm64, we intended that it would > force the entire linear map to be mapped at page granularity, but we > only enforced this in arch_add_memory() and not in map_mem(), so > memory mapped at boot time can be mapped at a larger granularity. > > When booting a kernel with KFENCE=y and RODATA_FULL=n, this results in > the following WARNING at boot: > > [...] Applied to arm64 (for-next/fixes), thanks! [1/1] arm64: mm: don't use CON and BLK mapping if KFENCE is enabled https://git.kernel.org/arm64/c/e69012400b0c -- Catalin