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=-20.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 80F47C63798 for ; Fri, 20 Nov 2020 12:45:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 256E622D0A for ; Fri, 20 Nov 2020 12:45:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="qFopZQCx"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="ITYPfUSx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727872AbgKTMow (ORCPT ); Fri, 20 Nov 2020 07:44:52 -0500 Received: from Galois.linutronix.de ([193.142.43.55]:40504 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725797AbgKTMov (ORCPT ); Fri, 20 Nov 2020 07:44:51 -0500 Date: Fri, 20 Nov 2020 12:44:48 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1605876289; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Po6hMNLYVS0Z3NJUrq9IN25TwJsdGVJZiUmrzvotxso=; b=qFopZQCx0YDNuhL9eUU4R8HuAyJxw0ZIWCg66LvyqVoSQjNZOttTVPGYU3Td5Z/C2DO/li Lz6xTHrgHX78pp9OVXNVBZ4vIy6CULNfd3vNEObAyOa4HgzO98fs3Sf2FeEpcaSnXOGzut T53xHdqWzX8Aj+/eN4MfxoqR+01/kBJOxpV9Q7G1reqOc61VTCExqaKOhs5pvKpyG7MY+f L840BI/jKOzEZ3oWidQLPADCgCj2FoLOLUh9T6wzWL9gezrCIlmXHyF9BM1ieaRrv8pq6I ItRkz4sBgmO0ZxKXYy0JDqa2UoD8aTpMW+tE7+jiRvR/dyBDpFQNuwAki6qOmA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1605876289; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Po6hMNLYVS0Z3NJUrq9IN25TwJsdGVJZiUmrzvotxso=; b=ITYPfUSxDmGUaKIb5zO2s3Aj0qpwgXNLesefF5xWNdZJXroTNBtElUQfJoGvvqDNJjbJBO oOF8E4w4HCyMfvAg== From: "tip-bot2 for Frederic Weisbecker" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: core/entry] x86: Support HAVE_CONTEXT_TRACKING_OFFSTACK Cc: Frederic Weisbecker , "Peter Zijlstra (Intel)" , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20201117151637.259084-6-frederic@kernel.org> References: <20201117151637.259084-6-frederic@kernel.org> MIME-Version: 1.0 Message-ID: <160587628844.11244.216988947383639442.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the core/entry branch of tip: Commit-ID: d1f250e2205eca9f1264f8e2d3a41fcf38f92d91 Gitweb: https://git.kernel.org/tip/d1f250e2205eca9f1264f8e2d3a41fcf38f92d91 Author: Frederic Weisbecker AuthorDate: Tue, 17 Nov 2020 16:16:37 +01:00 Committer: Peter Zijlstra CommitterDate: Thu, 19 Nov 2020 11:25:42 +01:00 x86: Support HAVE_CONTEXT_TRACKING_OFFSTACK A lot of ground work has been performed on x86 entry code. Fragile path between user_enter() and user_exit() have IRQs disabled. Uses of RCU and intrumentation in these fragile areas have been explicitly annotated and protected. This architecture doesn't need exception_enter()/exception_exit() anymore and has therefore earned CONFIG_HAVE_CONTEXT_TRACKING_OFFSTACK. Signed-off-by: Frederic Weisbecker Signed-off-by: Peter Zijlstra (Intel) Link: https://lkml.kernel.org/r/20201117151637.259084-6-frederic@kernel.org --- arch/x86/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index f6946b8..d793361 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -162,6 +162,7 @@ config X86 select HAVE_CMPXCHG_DOUBLE select HAVE_CMPXCHG_LOCAL select HAVE_CONTEXT_TRACKING if X86_64 + select HAVE_CONTEXT_TRACKING_OFFSTACK if HAVE_CONTEXT_TRACKING select HAVE_C_RECORDMCOUNT select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_CONTIGUOUS