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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 03547C433E6 for ; Tue, 2 Mar 2021 12:36:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ADE4564F20 for ; Tue, 2 Mar 2021 12:36:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1444215AbhCBMdh (ORCPT ); Tue, 2 Mar 2021 07:33:37 -0500 Received: from mail.kernel.org ([198.145.29.99]:40132 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244617AbhCBMBx (ORCPT ); Tue, 2 Mar 2021 07:01:53 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id EAC5764F0E; Tue, 2 Mar 2021 11:55:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1614686160; bh=pyvkKG6xNO25r+4NNTsksYyuERDmsedBHxXCzBO9PFA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iv4cCGaWqWZoPq3INuBTIf7aDQqupQWv77lowlhEslG4iatiMa5s1h4ErP9hI3YRN jk2ggcvgYINkDhDWbf5oMXWlNjbv3SMs3FqqINsDtGVJXg7ZpZpqU/sy//yIRSvlJn PJ04T3N4fIzLMJmPRuOQDc0GnGDjZRD+GlBy0OOt9N3hdQ+mT9pmc95g69iDKzLccJ AeMxsvTtPL/WVsZ0VtTNhvBPtaHWvdn0EFpxjaQGVzfO/Dxb9IbcWpBCfTyPUle8ib /OG1Rwi0tcz3GWw7wZEYJ8KAtrwkF+yXKyasTZTYsy4heYEEQRGB9r873aLxMH+fxX KQLU+4314uf4g== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Nicholas Piggin , Michael Ellerman , Sasha Levin , linuxppc-dev@lists.ozlabs.org Subject: [PATCH AUTOSEL 5.11 19/52] powerpc: improve handling of unrecoverable system reset Date: Tue, 2 Mar 2021 06:55:00 -0500 Message-Id: <20210302115534.61800-19-sashal@kernel.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210302115534.61800-1-sashal@kernel.org> References: <20210302115534.61800-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Nicholas Piggin [ Upstream commit 11cb0a25f71818ca7ab4856548ecfd83c169aa4d ] If an unrecoverable system reset hits in process context, the system does not have to panic. Similar to machine check, call nmi_exit() before die(). Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210130130852.2952424-26-npiggin@gmail.com Signed-off-by: Sasha Levin --- arch/powerpc/kernel/traps.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 3ec7b443fe6b..4be05517f2db 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -503,8 +503,11 @@ out: die("Unrecoverable nested System Reset", regs, SIGABRT); #endif /* Must die if the interrupt is not recoverable */ - if (!(regs->msr & MSR_RI)) + if (!(regs->msr & MSR_RI)) { + /* For the reason explained in die_mce, nmi_exit before die */ + nmi_exit(); die("Unrecoverable System Reset", regs, SIGABRT); + } if (saved_hsrrs) { mtspr(SPRN_HSRR0, hsrr0); -- 2.30.1