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 546C1C433DB for ; Mon, 1 Mar 2021 13:37:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 20F0B64DAF for ; Mon, 1 Mar 2021 13:37:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235797AbhCANhQ (ORCPT ); Mon, 1 Mar 2021 08:37:16 -0500 Received: from forward3-smtp.messagingengine.com ([66.111.4.237]:32891 "EHLO forward3-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235850AbhCANhM (ORCPT ); Mon, 1 Mar 2021 08:37:12 -0500 Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailforward.nyi.internal (Postfix) with ESMTP id 37E831941D9B; Mon, 1 Mar 2021 08:36:24 -0500 (EST) Received: from mailfrontend1 ([10.202.2.162]) by compute1.internal (MEProxy); Mon, 01 Mar 2021 08:36:24 -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=HGbg+D IYSxjfZxd2qN5xKQi7Je7ZbElpe54vlcU3k4M=; b=hj2AgjgESvg/nvHstygv5/ F2NaJyLu6/dzvhj0HePmNKL+bQ0QYCujN/RtlyQPnGVHA3ylVq9rnwVmVzLAHwsa WGOGL9XyPxC2fNOu0/2oXtQwHNq+AcnnY2vRvdTMqKGkcWofGIUD0A5og1CahDMH 5MSEhw3OH/Sb6C0irbo2c7zav0nxlmSrur7uNobPO1Cce0iOLsXQqwYygcs8yznE laFj/QnELW3UV7fmvEoWmNQids4mnpdnt55k0fkXyrqw6VvDPFuZZxpXJ5g7Dva6 DpkvP4EEHLgTLQ66YVu8D2za3o8mbMh67UkqV1Bo/OXoxTJXjDja634NNGptEAhQ == X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduledrleekgdehfecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecunecujfgurhepuffvhfffkfggtgfgsehtkeertddttd flnecuhfhrohhmpeeoghhrvghgkhhhsehlihhnuhigfhhouhhnuggrthhiohhnrdhorhhg qeenucggtffrrghtthgvrhhnpeevuedukeegheeitdfhfefgvedvteethedvieehheduge dtvdevgfdtieehkeeuheenucffohhmrghinhepvghnthhrhidrshgsnecukfhppeekfedr keeirdejgedrieegnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehmrghilh 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 91D4124005A; Mon, 1 Mar 2021 08:36:23 -0500 (EST) Subject: FAILED: patch "[PATCH] s390: open code SWITCH_KERNEL macro" 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 14:36:22 +0100 Message-ID: <1614605782251246@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 b0d31159a46787380353426faaad8febc9bef009 Mon Sep 17 00:00:00 2001 From: Sven Schnelle Date: Thu, 28 Jan 2021 13:06:05 +0100 Subject: [PATCH] s390: open code SWITCH_KERNEL macro This is a preparation patch for two later bugfixes. In the past both int_handler and machine check handler used SWITCH_KERNEL to switch to the kernel stack. However, SWITCH_KERNEL doesn't work properly in machine check context. So instead of adding more complexity to this macro, just remove it. 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 9b3aea98f886..ed5acf95235f 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -81,32 +81,6 @@ _LPP_OFFSET = __LC_LPP #endif .endm - .macro SWITCH_KERNEL savearea - tmhh %r8,0x0001 # interrupting from user ? - jnz 1f -#if IS_ENABLED(CONFIG_KVM) - lgr %r14,%r9 - larl %r13,.Lsie_gmap - slgr %r14,%r13 - lghi %r13,.Lsie_done - .Lsie_gmap - clgr %r14,%r13 - jhe 0f - lghi %r11,\savearea # inside critical section, do cleanup - brasl %r14,.Lcleanup_sie -#endif -0: CHECK_STACK \savearea - lgr %r11,%r15 - aghi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE) - stg %r11,__SF_BACKCHAIN(%r15) - j 2f -1: BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP - lctlg %c1,%c1,__LC_KERNEL_ASCE - lg %r15,__LC_KERNEL_STACK - xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) -2: la %r11,STACK_FRAME_OVERHEAD(%r15) - .endm - - # Use STORE CLOCK by default, switch to STORE CLOCK FAST if available. .macro STCK savearea ALTERNATIVE ".insn s,0xb2050000,\savearea", \ ".insn s,0xb27c0000,\savearea", 25 @@ -413,7 +387,28 @@ ENTRY(\name) stmg %r8,%r15,__LC_SAVE_AREA_ASYNC lg %r12,__LC_CURRENT lmg %r8,%r9,\lc_old_psw - SWITCH_KERNEL __LC_SAVE_AREA_ASYNC + tmhh %r8,0x0001 # interrupting from user ? + jnz 1f +#if IS_ENABLED(CONFIG_KVM) + lgr %r14,%r9 + larl %r13,.Lsie_gmap + slgr %r14,%r13 + lghi %r13,.Lsie_done - .Lsie_gmap + clgr %r14,%r13 + jhe 0f + lghi %r11,__LC_SAVE_AREA_ASYNC # inside critical section, do cleanup + brasl %r14,.Lcleanup_sie +#endif +0: CHECK_STACK __LC_SAVE_AREA_ASYNC + lgr %r11,%r15 + aghi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE) + stg %r11,__SF_BACKCHAIN(%r15) + j 2f +1: BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP + lctlg %c1,%c1,__LC_KERNEL_ASCE + lg %r15,__LC_KERNEL_STACK + xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) +2: la %r11,STACK_FRAME_OVERHEAD(%r15) stmg %r0,%r7,__PT_R0(%r11) # clear user controlled registers to prevent speculative use xgr %r0,%r0 @@ -542,7 +537,30 @@ ENTRY(mcck_int_handler) TSTMSK __LC_MCCK_CODE,MCCK_CODE_PSW_IA_VALID jno .Lmcck_panic 4: ssm __LC_PGM_NEW_PSW # turn dat on, keep irqs off - SWITCH_KERNEL __LC_GPREGS_SAVE_AREA+64 + tmhh %r8,0x0001 # interrupting from user ? + jnz .Lmcck_user +#if IS_ENABLED(CONFIG_KVM) + lgr %r14,%r9 + larl %r13,.Lsie_gmap + slgr %r14,%r13 + lghi %r13,.Lsie_done - .Lsie_gmap + clgr %r14,%r13 + jhe .Lmcck_stack + lghi %r11,__LC_GPREGS_SAVE_AREA+64 # inside critical section, do cleanup + brasl %r14,.Lcleanup_sie +.Lmcck_stack: +#endif + CHECK_STACK __LC_GPREGS_SAVE_AREA+64 + lgr %r11,%r15 + aghi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE) + stg %r11,__SF_BACKCHAIN(%r15) + j 5f +.Lmcck_user: + BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP + lctlg %c1,%c1,__LC_KERNEL_ASCE + lg %r15,__LC_KERNEL_STACK + xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) +5: la %r11,STACK_FRAME_OVERHEAD(%r15) .Lmcck_skip: lghi %r14,__LC_GPREGS_SAVE_AREA+64 stmg %r0,%r7,__PT_R0(%r11)