From mboxrd@z Thu Jan 1 00:00:00 1970 From: 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> References: <20200512144803.24344-1-ykaukab@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20200512144803.24344-1-ykaukab-l3A5Bk7waGM@public.gmane.org> Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org, robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, robin.murphy-5wv7dgnIgG8@public.gmane.org Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, talho-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org, thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, afaerber-l3A5Bk7waGM@public.gmane.org, arnd-r2nGTMty4D4@public.gmane.org, gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org, Mian Yousaf Kaukab List-Id: 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"; -- 2.25.0 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=-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=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 DBD5BC54E8D for ; Tue, 12 May 2020 14:48:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C3817206D6 for ; Tue, 12 May 2020 14:48:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730378AbgELOsr (ORCPT ); Tue, 12 May 2020 10:48:47 -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 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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"; -- 2.25.0 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=-9.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 7A327C54E4A for ; 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bh=AeC54esBc12u6Kzpw30MDg1jAiAznUKGOE4T49F4kBw=; b=c6YmTj1/X1xoe5 +3qcNo2hHoPWYfn3H1TP3UEX2zsfiYKIIJUIaMPdeXV6MmmAXNXsWPqiE1QO7i2nx+jBfAztd4UDd d3jvyL87L85ZIm9wIqkD77AWe3GHYgfwRANKnX5vsTKfMQdPlzbk0BoxbeeFo1G4SxEHg/KA8r92Y Mcbxa8YE6/UxU2DycY1DU+wsYNrHzmzjibCjPS8tw7Z18HdQLuyLr4BjsSWeb3SFvB82cFEuOhBPj D5cOB67nTx0X1L2flrfr/g17Or37AjgM1yk3OVZ5vT0mtgQd4Dpvb/jd8pTVjhEJkqNwvvwgaDPHo U6ve9OUgvLce01h1c9Pg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jYWD9-00069l-Dv; Tue, 12 May 2020 14:48:47 +0000 Received: from mx2.suse.de ([195.135.220.15]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jYWD6-00068K-Po for linux-arm-kernel@lists.infradead.org; Tue, 12 May 2020 14:48:46 +0000 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 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200512_074844_988927_F2499E83 X-CRM114-Status: GOOD ( 12.65 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, arnd@arndb.de, gregkh@linuxfoundation.org, Mian Yousaf Kaukab , linux-kernel@vger.kernel.org, jonathanh@nvidia.com, talho@nvidia.com, thierry.reding@gmail.com, linux-tegra@vger.kernel.org, afaerber@suse.de, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org YnBtcCBkcml2ZXIgaGFzIHJlc2VydmVkIHJlZ2lvbnMgaW4gc3lzcmFtLiBTaW5jZSBzeXNyYW0g aXMgb25seSB1c2VkCmJ5IHRoZSBicG1wIGRyaXZlciwgYWRkIOKAmHJlc2VydmVkLW9ubHnigJkg ZmxhZyB0byB0aGUgc3lzcmFtIG5vZGUgc28KdGhhdCBvbmx5IHJlZ2lvbnMgdXNlZCBieSB0aGUg YnBtcCBkcml2ZXIgYXJlIHJlbWFwcGVkLiBPdGhlciByZWdpb25zCm9mIHRoZSBzeXNyYW0gbWF5 IG5vdCBiZSBhY2Nlc3NpYmxlIHRvIHRoZSBrZXJuZWwgYW5kIGEgc3BlY3VsYXRpdmUKYWNjZXNz IHRvIHRoZW0gY2FuIGNhdXNlIFNFcnJvci4KClNpZ25lZC1vZmYtYnk6IE1pYW4gWW91c2FmIEth dWthYiA8eWthdWthYkBzdXNlLmRlPgotLS0KIGFyY2gvYXJtNjQvYm9vdC9kdHMvbnZpZGlhL3Rl Z3JhMTg2LmR0c2kgfCAxICsKIDEgZmlsZSBjaGFuZ2VkLCAxIGluc2VydGlvbigrKQoKZGlmZiAt LWdpdCBhL2FyY2gvYXJtNjQvYm9vdC9kdHMvbnZpZGlhL3RlZ3JhMTg2LmR0c2kgYi9hcmNoL2Fy bTY0L2Jvb3QvZHRzL252aWRpYS90ZWdyYTE4Ni5kdHNpCmluZGV4IDU4MTAwZmI5Y2Q4Yi4uMDdj ZTdlN2IyNzBjIDEwMDY0NAotLS0gYS9hcmNoL2FybTY0L2Jvb3QvZHRzL252aWRpYS90ZWdyYTE4 Ni5kdHNpCisrKyBiL2FyY2gvYXJtNjQvYm9vdC9kdHMvbnZpZGlhL3RlZ3JhMTg2LmR0c2kKQEAg LTEyMTksNiArMTIxOSw3IEBAIHN5c3JhbUAzMDAwMDAwMCB7CiAJCSNhZGRyZXNzLWNlbGxzID0g PDI+OwogCQkjc2l6ZS1jZWxscyA9IDwyPjsKIAkJcmFuZ2VzID0gPDAgMHgwIDB4MCAweDMwMDAw MDAwIDB4MCAweDUwMDAwPjsKKwkJcmVzZXJ2ZWQtb25seTsKIAogCQljcHVfYnBtcF90eDogc2ht ZW1ANGUwMDAgewogCQkJY29tcGF0aWJsZSA9ICJudmlkaWEsdGVncmExODYtYnBtcC1zaG1lbSI7 Ci0tIAoyLjI1LjAKCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fXwpsaW51eC1hcm0ta2VybmVsIG1haWxpbmcgbGlzdApsaW51eC1hcm0ta2VybmVsQGxpc3Rz LmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5m by9saW51eC1hcm0ta2VybmVsCg==