From patchwork Tue May 12 14:48:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Yousaf Kaukab X-Patchwork-Id: 1288494 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-tegra-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=suse.de Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49M0zy08jxz9sSs for ; Wed, 13 May 2020 00:48:46 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730239AbgELOso (ORCPT ); Tue, 12 May 2020 10:48:44 -0400 Received: from mx2.suse.de ([195.135.220.15]:35678 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730211AbgELOsn (ORCPT ); Tue, 12 May 2020 10:48:43 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 0E9E4ACC3; Tue, 12 May 2020 14:48:44 +0000 (UTC) From: Mian Yousaf Kaukab To: swarren@wwwdotorg.org, robh+dt@kernel.org, robin.murphy@arm.com Cc: devicetree@vger.kernel.org, talho@nvidia.com, thierry.reding@gmail.com, jonathanh@nvidia.com, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, afaerber@suse.de, arnd@arndb.de, gregkh@linuxfoundation.org, Mian Yousaf Kaukab Subject: [PATCH 3/4] arm64: tegra186: add reserved-only flag in sysram node Date: Tue, 12 May 2020 16:48:02 +0200 Message-Id: <20200512144803.24344-3-ykaukab@suse.de> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200512144803.24344-1-ykaukab@suse.de> References: <20200512144803.24344-1-ykaukab@suse.de> MIME-Version: 1.0 Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org bpmp driver has reserved regions in sysram. Since sysram is only used by the bpmp driver, add ‘reserved-only’ flag to the sysram node so that only regions used by the bpmp driver are remapped. Other regions of the sysram may not be accessible to the kernel and a speculative access to them can cause SError. Signed-off-by: Mian Yousaf Kaukab --- arch/arm64/boot/dts/nvidia/tegra186.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/boot/dts/nvidia/tegra186.dtsi b/arch/arm64/boot/dts/nvidia/tegra186.dtsi index 58100fb9cd8b..07ce7e7b270c 100644 --- a/arch/arm64/boot/dts/nvidia/tegra186.dtsi +++ b/arch/arm64/boot/dts/nvidia/tegra186.dtsi @@ -1219,6 +1219,7 @@ sysram@30000000 { #address-cells = <2>; #size-cells = <2>; ranges = <0 0x0 0x0 0x30000000 0x0 0x50000>; + reserved-only; cpu_bpmp_tx: shmem@4e000 { compatible = "nvidia,tegra186-bpmp-shmem";