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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS 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 AAFDAC282C8 for ; Mon, 28 Jan 2019 12:26:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7EFD02171F for ; Mon, 28 Jan 2019 12:26:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726805AbfA1M0O (ORCPT ); Mon, 28 Jan 2019 07:26:14 -0500 Received: from foss.arm.com ([217.140.101.70]:44630 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726415AbfA1M0O (ORCPT ); Mon, 28 Jan 2019 07:26:14 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id D6579EBD; Mon, 28 Jan 2019 04:26:13 -0800 (PST) Received: from big-swifty.misterjones.org (big-swifty.cambridge.arm.com [10.1.39.122]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 26D1B3F59C; Mon, 28 Jan 2019 04:26:10 -0800 (PST) Date: Mon, 28 Jan 2019 12:26:13 +0000 Message-ID: <86sgxdufx6.wl-marc.zyngier@arm.com> From: Marc Zyngier To: Julien Thierry Cc: , , , , , , , , , Dave Martin Subject: Re: [PATCH v9 23/26] arm64: Handle serror in NMI context In-Reply-To: <1548084825-8803-24-git-send-email-julien.thierry@arm.com> References: <1548084825-8803-1-git-send-email-julien.thierry@arm.com> <1548084825-8803-24-git-send-email-julien.thierry@arm.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.8 EasyPG/1.0.0 Emacs/25.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) Organization: ARM Ltd MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 21 Jan 2019 15:33:42 +0000, Julien Thierry wrote: > > Per definition of the daifflags, Serrors can occur during any interrupt > context, that includes NMI contexts. Trying to nmi_enter in an nmi context > will crash. > > Skip nmi_enter/nmi_exit when serror occurred during an NMI. > > Suggested-by: James Morse > Signed-off-by: Julien Thierry > Cc: Catalin Marinas > Cc: Will Deacon > Cc: Mark Rutland > Cc: Dave Martin > Cc: James Morse Acked-by: Marc Zyngier M. -- Jazz is not dead, it just smell funny. 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=-4.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS 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 7F7E2C282C8 for ; Mon, 28 Jan 2019 12:26:32 +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 4E6952171F for ; Mon, 28 Jan 2019 12:26:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="idKHpfjI" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4E6952171F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Subject:To:From:Message-ID:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=X9RQWHnd2HU+hsNCWPq6rLq2c3oShlez5XO67KHLS9Q=; b=idKHpfjId5l8G5 lMCmqQoeWz+UUyYIOotfTivmSDjMFyKo6/ckYoJY2ZerVL/2YuiBS4cwGO9a5po3gyU3kgif631vJ LvjYapcPaR3xw1pKgn/3xML9zyfHzVGO/ZGF9TTo7oPwMVQIv1NORLHYkeFlrc7XyC8DMt0lSd3rS 5I4b5bJ6kVLSTK1vMHntO07Id52QwH5WXxN/wd5+CX0m9kVSnrDQL8Eewdod/sYULvZH769HJ7emY eiqJ8nI5++yT3UrZtldfM62D+88JrpORx4uTX7laxsyDVYolyy6kYv1L170EtYobvVm8z2xpcyGSK fGV0CmVP74PIMx2v1hHA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1go5zV-0003cO-PO; Mon, 28 Jan 2019 12:26:17 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1go5zS-0003c5-Nb for linux-arm-kernel@lists.infradead.org; Mon, 28 Jan 2019 12:26:15 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id D6579EBD; Mon, 28 Jan 2019 04:26:13 -0800 (PST) Received: from big-swifty.misterjones.org (big-swifty.cambridge.arm.com [10.1.39.122]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 26D1B3F59C; Mon, 28 Jan 2019 04:26:10 -0800 (PST) Date: Mon, 28 Jan 2019 12:26:13 +0000 Message-ID: <86sgxdufx6.wl-marc.zyngier@arm.com> From: Marc Zyngier To: Julien Thierry Subject: Re: [PATCH v9 23/26] arm64: Handle serror in NMI context In-Reply-To: <1548084825-8803-24-git-send-email-julien.thierry@arm.com> References: <1548084825-8803-1-git-send-email-julien.thierry@arm.com> <1548084825-8803-24-git-send-email-julien.thierry@arm.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.8 EasyPG/1.0.0 Emacs/25.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) Organization: ARM Ltd MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190128_042614_775065_01213A1D X-CRM114-Status: GOOD ( 10.62 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, daniel.thompson@linaro.org, catalin.marinas@arm.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, christoffer.dall@arm.com, james.morse@arm.com, joel@joelfernandes.org, Dave Martin , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, 21 Jan 2019 15:33:42 +0000, Julien Thierry wrote: > > Per definition of the daifflags, Serrors can occur during any interrupt > context, that includes NMI contexts. Trying to nmi_enter in an nmi context > will crash. > > Skip nmi_enter/nmi_exit when serror occurred during an NMI. > > Suggested-by: James Morse > Signed-off-by: Julien Thierry > Cc: Catalin Marinas > Cc: Will Deacon > Cc: Mark Rutland > Cc: Dave Martin > Cc: James Morse Acked-by: Marc Zyngier M. -- Jazz is not dead, it just smell funny. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel