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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 368F7C433DB for ; Mon, 1 Mar 2021 16:57:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 075A1650CD for ; Mon, 1 Mar 2021 16:57:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236522AbhCAQ4r (ORCPT ); Mon, 1 Mar 2021 11:56:47 -0500 Received: from mail.kernel.org ([198.145.29.99]:50422 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235742AbhCAQte (ORCPT ); Mon, 1 Mar 2021 11:49:34 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1934464FA8; Mon, 1 Mar 2021 16:32:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614616368; bh=BZzsVErNgiH1I1NapwYKPOpvHbLEZOWfA8JSE17bWzQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vUfPhkKE7sSLslJt/Q1j7fip1HiRuLk/kmoOAtf/dCdAQ1VDiJff+nWOif9PjmmlH AtGaqdCOaVHOTcNTHJZmrED2juCJ085qj6irb7olxPl8VuCFJPNm7tUkvqgt4k/Hb4 9JgyxmevM/i7fsKIsQ170fQekVhncJqH4Mk+z3TM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Christophe Leroy , Michael Ellerman , Sasha Levin Subject: [PATCH 4.14 097/176] powerpc/8xx: Fix software emulation interrupt Date: Mon, 1 Mar 2021 17:12:50 +0100 Message-Id: <20210301161025.801266931@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161020.931630716@linuxfoundation.org> References: <20210301161020.931630716@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Christophe Leroy [ Upstream commit 903178d0ce6bb30ef80a3604ab9ee2b57869fbc9 ] For unimplemented instructions or unimplemented SPRs, the 8xx triggers a "Software Emulation Exception" (0x1000). That interrupt doesn't set reason bits in SRR1 as the "Program Check Exception" does. Go through emulation_assist_interrupt() to set REASON_ILLEGAL. Fixes: fbbcc3bb139e ("powerpc/8xx: Remove SoftwareEmulation()") Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/ad782af87a222efc79cfb06079b0fd23d4224eaf.1612515180.git.christophe.leroy@csgroup.eu Signed-off-by: Sasha Levin --- arch/powerpc/kernel/head_8xx.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 43884af0e35c4..95ecfec96b495 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -301,7 +301,7 @@ SystemCall: /* On the MPC8xx, this is a software emulation interrupt. It occurs * for all unimplemented and illegal instructions. */ - EXCEPTION(0x1000, SoftEmu, program_check_exception, EXC_XFER_STD) + EXCEPTION(0x1000, SoftEmu, emulation_assist_interrupt, EXC_XFER_STD) . = 0x1100 /* -- 2.27.0