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=-6.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT 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 CC67DC43387 for ; Fri, 18 Jan 2019 16:10:49 +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 9D35A20850 for ; Fri, 18 Jan 2019 16:10:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="cDPxFrmg" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9D35A20850 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:In-Reply-To:MIME-Version:References: Message-ID:Subject: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=mcwL3DhwBZwJ3vg5Sb1YjJ8iVAt5o2ckVV2O3HopYWc=; b=cDPxFrmg3ivHu0 l8wiUst8to+NbD97H56Ahxtb4XocmfFw8cP4tnVshH3xE76EL3elMOJo8OmnbQJAB88fV8fcnHD3b D3sT82e5lhA+g7kVvFaTvRgLzPeBVZmApB99bi/kvwk6koWxOVPhN+OHEoj1K3u3piHpMd8eZjnac m/tPzMPhE9ctspqmiSY6Gl2DMvOUYZ1CXBgw7utOxTLLYQuLzFUh8G/a+ssrlzuCAWkMQYd/G6r8U tG7Dp2Nn+H8vxl9JMvMuNA8PtlQYQOCEli8UZjayjgIAyTX+xYstWOLWrhJsWCynCqoku8GKVZ+31 WGwP7+ZBgdAdi/fz1YIA==; 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 1gkWjF-00033S-46; Fri, 18 Jan 2019 16:10:45 +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 1gkWjB-000337-Ts for linux-arm-kernel@lists.infradead.org; Fri, 18 Jan 2019 16:10:43 +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 9A405EBD; Fri, 18 Jan 2019 08:10:41 -0800 (PST) Received: from arrakis.emea.arm.com (arrakis.cambridge.arm.com [10.1.196.113]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 887E53F557; Fri, 18 Jan 2019 08:10:39 -0800 (PST) Date: Fri, 18 Jan 2019 16:10:37 +0000 From: Catalin Marinas To: Julien Thierry Subject: Re: [PATCH v8 08/26] arm64: Make PMR part of task context Message-ID: <20190118161036.GG118707@arrakis.emea.arm.com> References: <1546956464-48825-1-git-send-email-julien.thierry@arm.com> <1546956464-48825-9-git-send-email-julien.thierry@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1546956464-48825-9-git-send-email-julien.thierry@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-20190118_081041_975988_D4DDA1FA X-CRM114-Status: GOOD ( 11.32 ) 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, marc.zyngier@arm.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, christoffer.dall@arm.com, james.morse@arm.com, Oleg Nesterov , 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 Tue, Jan 08, 2019 at 02:07:26PM +0000, Julien Thierry wrote: > In order to replace PSR.I interrupt disabling/enabling with ICC_PMR_EL1 > interrupt masking, ICC_PMR_EL1 needs to be saved/restored when > taking/returning from an exception. This mimics the way hardware saves > and restores PSR.I bit in spsr_el1 for exceptions and ERET. > > Add PMR to the registers to save in the pt_regs struct upon kernel entry, > and restore it before ERET. Also, initialize it to a sane value when > creating new tasks. > > Signed-off-by: Julien Thierry > Cc: Catalin Marinas > Cc: Will Deacon > Cc: Oleg Nesterov > Cc: Dave Martin Reviewed-by: Catalin Marinas _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel