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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 1F7ACC433DB for ; Mon, 1 Mar 2021 13:37:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E2DEE6024A for ; Mon, 1 Mar 2021 13:37:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235767AbhCANhq (ORCPT ); Mon, 1 Mar 2021 08:37:46 -0500 Received: from forward3-smtp.messagingengine.com ([66.111.4.237]:41313 "EHLO forward3-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235859AbhCANhn (ORCPT ); Mon, 1 Mar 2021 08:37:43 -0500 Received: from compute4.internal (compute4.nyi.internal [10.202.2.44]) by mailforward.nyi.internal (Postfix) with ESMTP id 9201D1941E7A; Mon, 1 Mar 2021 08:36:56 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute4.internal (MEProxy); Mon, 01 Mar 2021 08:36:56 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:content-type :date:from:message-id:mime-version:subject:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm2; bh=exZF+u ALAfTBoUBH88Avb6LCfX9ZFILP2YBXAnZbiT4=; b=wowFJW6iQaZyOX0UEMTwUg YlBQuX/PdMyRIFaoGQMk4n8ZXzUdfSkzFIdzdmCUjHTuUgtP8S4d+sOlZONoVIOw lPFLHJYXao6KOgLrIK8cZtrWRYLNSvz9/yyzMXWQgR1GkO2XE01+aM3QeFs30j2E Scf2WEApSc9vTUEXYiHPKd3YOR70m7JVrZIy8rIhIDyqOHzSFiYqsuhcBX3EtfJV NxqIeMJ5h/sWvLTHNOa43ygVNCI2AQUd6f56kbIbdBbh3Pxk28SQN6PcejL5/47+ TGoPxfNs4+dXwx/4AFdT71Uy5melf0UkW04tzgfCRj0f5oFjzAp9Ld+3DY2kKiKg == X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduledrleekgdehvdcutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecunecujfgurhepuffvhfffkfggtgfgsehtkeertddttd flnecuhfhrohhmpeeoghhrvghgkhhhsehlihhnuhigfhhouhhnuggrthhiohhnrdhorhhg qeenucggtffrrghtthgvrhhnpeevuedukeegheeitdfhfefgvedvteethedvieehheduge dtvdevgfdtieehkeeuheenucffohhmrghinhepvghnthhrhidrshgsnecukfhppeekfedr keeirdejgedrieegnecuvehluhhsthgvrhfuihiivgepfeenucfrrghrrghmpehmrghilh hfrhhomhepghhrvghgsehkrhhorghhrdgtohhm X-ME-Proxy: Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) by mail.messagingengine.com (Postfix) with ESMTPA id 4D9AB1080059; Mon, 1 Mar 2021 08:36:56 -0500 (EST) Subject: FAILED: patch "[PATCH] s390: fix kernel asce loading when sie is interrupted" failed to apply to 5.11-stable tree To: svens@linux.ibm.com, gor@linux.ibm.com, hca@linux.ibm.com, stable@kernel.org Cc: From: Date: Mon, 01 Mar 2021 14:36:54 +0100 Message-ID: <161460581411228@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org The patch below does not apply to the 5.11-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 26521412ae22d06caab98721757b2721c6d7c46c Mon Sep 17 00:00:00 2001 From: Sven Schnelle Date: Wed, 3 Feb 2021 09:16:45 +0100 Subject: [PATCH] s390: fix kernel asce loading when sie is interrupted If a machine check is coming in during sie, the PU saves the control registers to the machine check save area. Afterwards mcck_int_handler is called, which loads __LC_KERNEL_ASCE into %cr1. Later the code restores %cr1 from the machine check area, but that is wrong when SIE was interrupted because the machine check area still contains the gmap asce. Instead it should return with either __KERNEL_ASCE in %cr1 when interrupted in SIE or the previous %cr1 content saved in the machine check save area. Fixes: 87d598634521 ("s390/mm: remove set_fs / rework address space handling") Signed-off-by: Sven Schnelle Cc: # v5.8+ Reviewed-by: Heiko Carstens Signed-off-by: Vasily Gorbik diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index f7953bb17558..377294969954 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -558,6 +558,7 @@ ENTRY(mcck_int_handler) lg %r15,__LC_MCCK_STACK .Lmcck_skip: la %r11,STACK_FRAME_OVERHEAD(%r15) + stctg %c1,%c1,__PT_CR1(%r11) lctlg %c1,%c1,__LC_KERNEL_ASCE xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) lghi %r14,__LC_GPREGS_SAVE_AREA+64 @@ -573,8 +574,6 @@ ENTRY(mcck_int_handler) xgr %r10,%r10 mvc __PT_R8(64,%r11),0(%r14) stmg %r8,%r9,__PT_PSW(%r11) - la %r14,4095 - mvc __PT_CR1(8,%r11),__LC_CREGS_SAVE_AREA-4095+8(%r14) xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11) xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) lgr %r2,%r11 # pass pointer to pt_regs