From patchwork Tue May 12 14:48:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mian Yousaf Kaukab X-Patchwork-Id: 200735 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=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, 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 EEE9DC54E8E for ; Tue, 12 May 2020 14:48:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D9772206A5 for ; Tue, 12 May 2020 14:48:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730380AbgELOsw (ORCPT ); Tue, 12 May 2020 10:48:52 -0400 Received: from mx2.suse.de ([195.135.220.15]:35662 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730195AbgELOsm (ORCPT ); Tue, 12 May 2020 10:48:42 -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 93249ACCE; Tue, 12 May 2020 14:48:43 +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 2/4] dt-bindings: sram: add documentation for reserved-only flag Date: Tue, 12 May 2020 16:48:01 +0200 Message-Id: <20200512144803.24344-2-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: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add documentation for the new optional flag added for SRAM driver. Signed-off-by: Mian Yousaf Kaukab --- Documentation/devicetree/bindings/sram/sram.yaml | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/sram/sram.yaml b/Documentation/devicetree/bindings/sram/sram.yaml index 19d116ff9ddc..4bcc309fa841 100644 --- a/Documentation/devicetree/bindings/sram/sram.yaml +++ b/Documentation/devicetree/bindings/sram/sram.yaml @@ -55,6 +55,12 @@ properties: as write combining. WC is used by default. type: boolean + reserved-only: + description: + The flag indicating, that only SRAM reserved regions have to be remapped. + remapping type is selected depending upon no-memory-wc as usual. + type: boolean + patternProperties: "^([a-z]*-)?sram(-section)?@[a-f0-9]+$": type: object 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: Mian Yousaf Kaukab X-Patchwork-Id: 200736 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=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, 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 15BD8C54E8D for ; Tue, 12 May 2020 14:48:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EB366206A5 for ; Tue, 12 May 2020 14:48:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730329AbgELOso (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: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@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";