From patchwork Wed Aug 21 10:20:51 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 1150774 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 46D3hL1cSLz9s3Z for ; Wed, 21 Aug 2019 20:25:22 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=c-s.fr Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=c-s.fr header.i=@c-s.fr header.b="kx7OwaVt"; dkim-atps=neutral Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 46D3hL0RwRzDrDD for ; Wed, 21 Aug 2019 20:25:22 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=c-s.fr (client-ip=93.17.236.30; helo=pegase1.c-s.fr; envelope-from=christophe.leroy@c-s.fr; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=c-s.fr Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=c-s.fr header.i=@c-s.fr header.b="kx7OwaVt"; dkim-atps=neutral Received: from pegase1.c-s.fr (pegase1.c-s.fr [93.17.236.30]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 46D3bC145szDqsN for ; Wed, 21 Aug 2019 20:20:55 +1000 (AEST) Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 46D3b56w75z9v00k; Wed, 21 Aug 2019 12:20:49 +0200 (CEST) Authentication-Results: localhost; dkim=pass reason="1024-bit key; insecure key" header.d=c-s.fr header.i=@c-s.fr header.b=kx7OwaVt; dkim-adsp=pass; dkim-atps=neutral X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id 5mxKnH78Nl8v; Wed, 21 Aug 2019 12:20:49 +0200 (CEST) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 46D3b55tB3z9v00j; Wed, 21 Aug 2019 12:20:49 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=c-s.fr; s=mail; t=1566382849; bh=N68GV62YPUP85s+ntUba1TxmZ6DCcu8UBUiNuPYWgF8=; h=From:Subject:To:Cc:Date:From; b=kx7OwaVtbU13+k4R8hFKFj7L3+ERcqPtEnofI7l+KTcRB2lBCew3WZ6KyXIT5bjLd rRiLtKj4lPRh98+ZGiTwlFHrcarZane7eQLeBTzbHXKm/AIsP+Sc9kQCIw140I7oW8 jiQGwGaCBiGRlBVrwxmIvoLy7szqOwW3XcvHVpuU= Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id BBA808B7E2; Wed, 21 Aug 2019 12:20:51 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id CtQxMFt3XWIt; Wed, 21 Aug 2019 12:20:51 +0200 (CEST) Received: from pc16032vm.idsi0.si.c-s.fr (po15451.idsi0.si.c-s.fr [172.25.230.101]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 9E9458B7E0; Wed, 21 Aug 2019 12:20:51 +0200 (CEST) Received: by pc16032vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 59EB96B73E; Wed, 21 Aug 2019 10:20:51 +0000 (UTC) Message-Id: <54f67bb7ac486c1350f2fa8905cd279f94b9dfb1.1566382841.git.christophe.leroy@c-s.fr> From: Christophe Leroy Subject: [PATCH] powerpc/8xx: set STACK_END_MAGIC earlier on the init_stack To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman Date: Wed, 21 Aug 2019 10:20:51 +0000 (UTC) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Today, the STACK_END_MAGIC is set on init_stack in start_kernel(). To avoid a false 'Thread overran stack, or stack corrupted' message on early Oopses, setup STACK_END_MAGIC as soon as possible. Signed-off-by: Christophe Leroy --- arch/powerpc/kernel/head_8xx.S | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 5ab9178c2347..b8ca5b43e587 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -15,6 +15,7 @@ */ #include +#include #include #include #include @@ -741,6 +742,9 @@ start_here: /* stack */ lis r1,init_thread_union@ha addi r1,r1,init_thread_union@l + lis r0, STACK_END_MAGIC@h + ori r0, r0, STACK_END_MAGIC@l + stw r0, 0(r1) li r0,0 stwu r0,THREAD_SIZE-STACK_FRAME_OVERHEAD(r1)