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=-13.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,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 09F7BC4742C for ; Fri, 13 Nov 2020 09:39:27 +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 80FD222263 for ; Fri, 13 Nov 2020 09:39:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="vbe7r6yw"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="H8pXASpf" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 80FD222263 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org 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:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=vcGeTFLWihf8QnI6NSo8PQXcW72C9aY422QPnFS06tI=; b=vbe7r6ywjJeYydgaWocoZ4DV8 foz8agI3oeACB7SqaelWbDPu1iEExtXzyehEzvDmcKET/7E51SWmEJij0s0ULb55Jovg0q6wfhIBC 6Bt8CBzXRKZy12BQOBCcUfm6UHK2lnB0kuWiSXzN90xcZI0icOVeKvpdLOQbPDA+wEityNbygyCUm o2prjMzlP8WBEO4s0vtkscTdFfnh5ccDK8glVvOyZoSyOxglgC6gW9Kr7Ol0HN+FLRtdWzhXr45rm 1qXxRqp9iDMbmKiC9Zy91wp754HZirs2FTKf8I4VKROx6ddZ06bJ9uH9RyrtFDdboeI8lfXK3RY4z gaVHSzQxA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kdVXq-0002l1-7d; Fri, 13 Nov 2020 09:39:02 +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 1kdVWw-0002O3-J9 for linux-arm-kernel@lists.infradead.org; Fri, 13 Nov 2020 09:38:08 +0000 Received: from localhost.localdomain (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7FC1322256; Fri, 13 Nov 2020 09:38:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1605260285; bh=J8+I2f+gPpziZ5U6sdn75jZAGik3lGxmmN6ishZFfVY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=H8pXASpfRCOapA6Jkxei/lB3qb4AVGc8BfhyocAUYLwjickDOqbUL+Jf91bB0+Pdl 5ys/nQVkSOijTysjHAzCt7WWyxjKb+ncTsCBHAT7GRc+m/1xP0/qU+itAl5fRLDxLo qxW+bUbroDgNn97IFhkqEWra2KgpKSX/9zgiIfWs= From: Will Deacon To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 08/14] arm64: exec: Adjust affinity for compat tasks with mismatched 32-bit EL0 Date: Fri, 13 Nov 2020 09:37:13 +0000 Message-Id: <20201113093720.21106-9-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20201113093720.21106-1-will@kernel.org> References: <20201113093720.21106-1-will@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201113_043806_782809_DFAB9D1E X-CRM114-Status: GOOD ( 16.51 ) 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, Marc Zyngier , kernel-team@android.com, Vincent Guittot , Juri Lelli , Quentin Perret , Peter Zijlstra , Catalin Marinas , Johannes Weiner , linux-kernel@vger.kernel.org, Qais Yousef , Suren Baghdasaryan , Ingo Molnar , Li Zefan , Greg Kroah-Hartman , Tejun Heo , Will Deacon , Morten Rasmussen 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 When exec'ing a 32-bit task on a system with mismatched support for 32-bit EL0, try to ensure that it starts life on a CPU that can actually run it. Signed-off-by: Will Deacon --- arch/arm64/kernel/process.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 1540ab0fbf23..17b94007fed4 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -625,6 +625,16 @@ unsigned long arch_align_stack(unsigned long sp) return sp & ~0xf; } +static void adjust_compat_task_affinity(struct task_struct *p) +{ + const struct cpumask *mask = system_32bit_el0_cpumask(); + + if (restrict_cpus_allowed_ptr(p, mask)) + set_cpus_allowed_ptr(p, mask); + + set_tsk_thread_flag(current, TIF_NOTIFY_RESUME); +} + /* * Called from setup_new_exec() after (COMPAT_)SET_PERSONALITY. */ @@ -635,7 +645,7 @@ void arch_setup_new_exec(void) if (is_compat_task()) { mmflags = MMCF_AARCH32; if (static_branch_unlikely(&arm64_mismatched_32bit_el0)) - set_tsk_thread_flag(current, TIF_NOTIFY_RESUME); + adjust_compat_task_affinity(current); } current->mm->context.flags = mmflags; -- 2.29.2.299.gdc1121823c-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel