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=-5.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 95EC1C56202 for ; Thu, 26 Nov 2020 18:44:02 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 1D67B21D7F for ; Thu, 26 Nov 2020 18:44:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Mqy3tk2q" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1D67B21D7F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+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=merlin.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:Date:Message-ID:From: References:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=aq0UaLn+K7brWcAhSN77xbP9QoZQqEvWXie1e3NpjbM=; b=Mqy3tk2qYCd+Z9hhihjX1txfK PpC0QpN0QDCOUhB8Of16bVvIPEQ8gBZCQC6B6rOtKajyE7ivms20Ai4+Skbvu1jD2HlZPmC7PZqnW ftjpuCmcx6b426nGhK3u+IuEWnUcaJkMexaVj429g2ZA19+x+z7oaeoKVS6znVe+AFrBBmKDBXiqH cVgRAdo8dnGPVcJcl9uIdU5WApb5Vl8VVSAj5MWHe2GVced03BsDB3T263naE0MBIveInj95rVe7I kONnzrEdkLFaqdpOKK50bLptz3ELBvJZgQ8GQwmkgSMubDemuRia4q3oY5wT/K9zlsQeQ+T49fqdG ZUYHBqpcg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kiMEA-0004Hd-TO; Thu, 26 Nov 2020 18:42:46 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kiME3-0004Dq-8g for linux-arm-kernel@lists.infradead.org; Thu, 26 Nov 2020 18:42:41 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id B8E4A16F8; Thu, 26 Nov 2020 10:42:37 -0800 (PST) Received: from [172.16.1.114] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id CB14B3F885; Thu, 26 Nov 2020 10:42:36 -0800 (PST) Subject: Re: [PATCHv4 14/17] arm64: uaccess: remove set_fs() To: Mark Rutland , Catalin Marinas References: <20201113124937.20574-1-mark.rutland@arm.com> <20201113124937.20574-15-mark.rutland@arm.com> <20201117104454.GA73209@C02TD0UTHF1T.local> <20201117105740.GB73209@C02TD0UTHF1T.local> <20201117110758.GC73209@C02TD0UTHF1T.local> From: James Morse Message-ID: <2c3231c1-c1ec-599b-b01e-49d6b7ac9a68@arm.com> Date: Thu, 26 Nov 2020 18:42:26 +0000 User-Agent: Mozilla/5.0 (X11; Linux aarch64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: <20201117110758.GC73209@C02TD0UTHF1T.local> Content-Language: en-GB X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201126_134239_579326_01A162F1 X-CRM114-Status: GOOD ( 10.69 ) 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: robin.murphy@arm.com, will@kernel.org, hch@lst.de, 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+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Mark, On 17/11/2020 11:07, Mark Rutland wrote: > On Tue, Nov 17, 2020 at 11:02:20AM +0000, Catalin Marinas wrote: >> On Tue, Nov 17, 2020 at 10:57:40AM +0000, Mark Rutland wrote: >>> On Tue, Nov 17, 2020 at 10:54:18AM +0000, Catalin Marinas wrote: >>>> Does this requirement apply retrospectively or it only for the future >>>> SDEI specs? >>> >>> It applies from the current spec, but note that TF-A has always >>> generated a new PSTATE (with UAO clear). >> >> And we can assume that TF-A is the only implementation generating SDEI. > > I *think* so, hopefully James can confirm. Yup. Neither kvmtool nor Qemu implementations were merged. We can avoid this with Gavin's in-kernel implementation if asynchronous-page-fault goes that way. Thanks, James _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel