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=-10.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 2EC19C4338F for ; Mon, 2 Aug 2021 11:24:24 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id F1A8D60F36 for ; Mon, 2 Aug 2021 11:24:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org F1A8D60F36 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=L9T0NvAqoT7ke2dykLphvkjPCSxHDSa/HibyT3X4OsE=; b=S+4d0h3cXkI6Lg ACIElRxbGTtQvWrHzDcublDsv1c+sLSkURmftLWsql/CSfexROJ4OkuBHtLgqkENalgoNVvHjVu8N Yzn8yiVXzePQ7HNzuBrWcBJRU4F7RfuC24t0OthGlMBxpHXNhVR4Skq7zcAl8M/RdFeB4CypKd4sU V5yIPiNLTZMYPf2CtR7tTplaOsERETK+Ybbajy0/FwAsgVccq8Lg0qBRwOwaUyz8waomP+GFPaJK0 LZsOSWpKERnlRXJLjuzuEM24E+Im3ahAe2C9PrqGjbGi5SK2rV2cQNSTn5CAM5z1jm6kX+wkPoGgd S6BOgJKuJmXY2Uo1mdew==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mAW1t-00FuDE-7S; Mon, 02 Aug 2021 11:22:45 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mAW1o-00FuBb-9R for linux-arm-kernel@lists.infradead.org; Mon, 02 Aug 2021 11:22:41 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id E646C60F36; Mon, 2 Aug 2021 11:22:37 +0000 (UTC) Date: Mon, 2 Aug 2021 12:22:35 +0100 From: Catalin Marinas To: Suzuki K Poulose Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, coresight@lists.linaro.org, anshuman.khandual@arm.com, will@kernel.org, james.morse@arm.com, mathieu.poirier@linaro.org, mike.leach@linaro.org, leo.yan@linaro.org, maz@kernel.org, mark.rutland@arm.com Subject: Re: [PATCH 07/10] arm64: Add erratum detection for TRBE overwrite in FILL mode Message-ID: <20210802112235.GC18685@arm.com> References: <20210728135217.591173-1-suzuki.poulose@arm.com> <20210728135217.591173-8-suzuki.poulose@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210728135217.591173-8-suzuki.poulose@arm.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210802_042240_397702_DC224848 X-CRM114-Status: GOOD ( 16.62 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Jul 28, 2021 at 02:52:14PM +0100, Suzuki K Poulose wrote: > Arm Neoverse-N2 and the Cortex-A710 cores are affected > by a CPU erratum where the TRBE will overwrite the trace buffer > in FILL mode. The TRBE doesn't stop (as expected in FILL mode) > when it reaches the limit and wraps to the base to continue > writing upto 3 cache lines. This will overwrite any trace that > was written previously. > > Add the Neoverse-N2 erratumi(#2139208) and Cortex-A710 erratum > (#2119858) to the detection logic. > > This will be used by the TRBE driver in later patches to work > around the issue. The detection has been kept with the core > arm64 errata framework list to make sure : > - We don't duplicate the framework in TRBE driver > - The errata detection is advertised like the rest > of the CPU errata. > > Note that the Kconfig entries will be added after we have added > the work around in the TRBE driver, which depends on the cpucap > from here. > > Cc: Will Deacon > Cc: Mark Rutland > Cc: Anshuman Khandual > Cc: Catalin Marinas > Cc: Mathieu Poirier > Cc: Mike Leach > cc: Leo Yan > Signed-off-by: Suzuki K Poulose Acked-by: Catalin Marinas _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel