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=-8.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 24CFEC4363A for ; Wed, 28 Oct 2020 12:12:21 +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 8E721246F0 for ; Wed, 28 Oct 2020 12:12:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="l84hWuS6" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8E721246F0 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: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=mjDh7UYVcJTRbeOx+cgV1IDeIk7fNZPI25n4nLJfkM8=; b=l84hWuS6yx7MJobJC2PIqU/6T dqZlhPDaKuS/YEjCW3yxl4D1xcDvO+N1y3QRFz1+TZp6LFkq9IcsNJ48LnAQ5BFG3OQzAeozpGU55 5bt3RTJxHMKEtoPCdGDL3qYVGekf0tZd76p+fmWwcRLA21FjsorkwQvEP/WW+PjTTycqIFdanTcjk 6gj90lg+oXZbcS7apGl+KjUZbLQz9Uj1SBc/Z8G6Zw9sckPzCbXEKMt8rHFroXAMTlydFZUeB61qg LjQHkQdtA5U1gw/1nk1Fzq1Tq6NXOxx7X5XaftoEZEErdnXEYzaiQss6WFQ/Cd++VqUitoY6CK802 eMjVd1LNw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kXkIC-00063Y-0a; Wed, 28 Oct 2020 12:11:04 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kXkI8-00062a-FN for linux-arm-kernel@lists.infradead.org; Wed, 28 Oct 2020 12:11:01 +0000 Received: from gaia (unknown [95.145.162.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 762B8246EE; Wed, 28 Oct 2020 12:10:56 +0000 (UTC) Date: Wed, 28 Oct 2020 12:10:53 +0000 From: Catalin Marinas To: Will Deacon Subject: Re: [PATCH 4/6] arm64: Kill 32-bit applications scheduled on 64-bit-only CPUs Message-ID: <20201028121052.GF13345@gaia> References: <20201027215118.27003-1-will@kernel.org> <20201027215118.27003-5-will@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20201027215118.27003-5-will@kernel.org> 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-20201028_081100_647443_77902FA7 X-CRM114-Status: GOOD ( 15.07 ) 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: linux-arch@vger.kernel.org, kernel-team@android.com, Peter Zijlstra , Marc Zyngier , Qais Yousef , Greg Kroah-Hartman , Suren Baghdasaryan , Morten Rasmussen , 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 On Tue, Oct 27, 2020 at 09:51:16PM +0000, Will Deacon wrote: > diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c > index 4784011cecac..c45b5f9dd66b 100644 > --- a/arch/arm64/kernel/process.c > +++ b/arch/arm64/kernel/process.c > @@ -542,6 +542,17 @@ static void erratum_1418040_thread_switch(struct task_struct *prev, > write_sysreg(val, cntkctl_el1); > } > > +static void compat_thread_switch(struct task_struct *next) > +{ > + if (!is_compat_thread(task_thread_info(next))) > + return; > + > + if (!system_has_mismatched_32bit_el0()) > + return; > + > + set_tsk_thread_flag(next, TIF_NOTIFY_RESUME); > +} I wonder whether you could use set_notify_resume() for consistency. -- Catalin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel