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=-13.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,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 191F5C433DF for ; Mon, 24 Aug 2020 09:28:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D5A952074D for ; Mon, 24 Aug 2020 09:28:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598261293; bh=6aHggL1RkTAzBEHv4FvfQ9+Mk3/6PJyf2EJjPbmIUQE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=KtyAmFzTJ8BfmYr0b4qsOJVQo5PB7A7z2BWROj15VetuY+rULvA1rK4fibnGu9skF RdPfOWJbfHWglU/u9PJzYwe4+Ky+7v+vpqLwKmZG/jRok+sB4Ul8RbHaFmtXbvKYsD 0uO2giJr2XYWekrCxXbPaP1vGDC04nhA2GBDxluk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730002AbgHXIvu (ORCPT ); Mon, 24 Aug 2020 04:51:50 -0400 Received: from mail.kernel.org ([198.145.29.99]:57040 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729978AbgHXIvq (ORCPT ); Mon, 24 Aug 2020 04:51:46 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2BC9C2075B; Mon, 24 Aug 2020 08:51:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598259105; bh=6aHggL1RkTAzBEHv4FvfQ9+Mk3/6PJyf2EJjPbmIUQE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=APzmcX5ibV+TXN/HuNjRlCNf5/AW7EtqnqkfXb2NxkueEUzGaFriOqF8igl2N4thu pv7o7gzX2uBvqMaqEe+FAmstQux0bDNO3SNbDv6ubNbhcK1/+qNYw3svZ7SUfWhcYm 4zNZ40DuygdZ3jL6m5dVTf9eRf9OlkxXc7whryUA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Greg Ungerer , Sasha Levin Subject: [PATCH 4.9 22/39] m68knommu: fix overwriting of bits in ColdFire V3 cache control Date: Mon, 24 Aug 2020 10:31:21 +0200 Message-Id: <20200824082349.687014923@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200824082348.445866152@linuxfoundation.org> References: <20200824082348.445866152@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Greg Ungerer [ Upstream commit bdee0e793cea10c516ff48bf3ebb4ef1820a116b ] The Cache Control Register (CACR) of the ColdFire V3 has bits that control high level caching functions, and also enable/disable the use of the alternate stack pointer register (the EUSP bit) to provide separate supervisor and user stack pointer registers. The code as it is today will blindly clear the EUSP bit on cache actions like invalidation. So it is broken for this case - and that will result in failed booting (interrupt entry and exit processing will be completely hosed). This only affects ColdFire V3 parts that support the alternate stack register (like the 5329 for example) - generally speaking new parts do, older parts don't. It has no impact on ColdFire V3 parts with the single stack pointer, like the 5307 for example. Fix the cache bit defines used, so they maintain the EUSP bit when carrying out cache actions through the CACR register. Signed-off-by: Greg Ungerer Signed-off-by: Sasha Levin --- arch/m68k/include/asm/m53xxacr.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/m68k/include/asm/m53xxacr.h b/arch/m68k/include/asm/m53xxacr.h index 3177ce8331d69..baee0c77b9818 100644 --- a/arch/m68k/include/asm/m53xxacr.h +++ b/arch/m68k/include/asm/m53xxacr.h @@ -88,9 +88,9 @@ * coherency though in all cases. And for copyback caches we will need * to push cached data as well. */ -#define CACHE_INIT CACR_CINVA -#define CACHE_INVALIDATE CACR_CINVA -#define CACHE_INVALIDATED CACR_CINVA +#define CACHE_INIT (CACHE_MODE + CACR_CINVA - CACR_EC) +#define CACHE_INVALIDATE (CACHE_MODE + CACR_CINVA) +#define CACHE_INVALIDATED (CACHE_MODE + CACR_CINVA) #define ACR0_MODE ((CONFIG_RAMBASE & 0xff000000) + \ (0x000f0000) + \ -- 2.25.1