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=-9.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 B8804C433E1 for ; Mon, 17 Aug 2020 17:58:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 925EC20825 for ; Mon, 17 Aug 2020 17:58:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597687128; bh=uNGWZjCsg64ckoUhe0XxFhNdO/u7Unjei4kpB/FWVdQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=hqzheblUos7i0DLFmU/dvANWWboMWgRefh6CjLPhduapkXtZlrOs8opBbmDnNKRVj ElFpI02R2qzgKx3N9sEM6EKeZNYIfFo8q2wRfrHN/1QFXhqMoG18J2YDz/jPoXp3hm KDhPP/SzGZpFtlw9v5m7tx64P/Grsgu3eXG5uCFA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390222AbgHQR6p (ORCPT ); Mon, 17 Aug 2020 13:58:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:35748 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388540AbgHQQKO (ORCPT ); Mon, 17 Aug 2020 12:10:14 -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 6335B20772; Mon, 17 Aug 2020 16:09:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597680599; bh=uNGWZjCsg64ckoUhe0XxFhNdO/u7Unjei4kpB/FWVdQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jbUSFgS8pm4ROKF+FimIsHZB6mopblhf7iyfVNVWLpc/hK1FBtR3p9cg03wzAW9EA fDUMe2WpNdLKKKnQk4FZjMDH26txL/t3PxgKbgpKXBIEFMKbl0TMl/GM//Cpcht/BF EhgakJzUPguPB8USt2xra3Jz0VZj6tBgw+LfLU4c= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sven Schnelle , Helge Deller Subject: [PATCH 5.4 251/270] parisc: mask out enable and reserved bits from sba imask Date: Mon, 17 Aug 2020 17:17:32 +0200 Message-Id: <20200817143808.328815013@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200817143755.807583758@linuxfoundation.org> References: <20200817143755.807583758@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: Sven Schnelle commit 5b24993c21cbf2de11aff077a48c5cb0505a0450 upstream. When using kexec the SBA IOMMU IBASE might still have the RE bit set. This triggers a WARN_ON when trying to write back the IBASE register later, and it also makes some mask calculations fail. Cc: Signed-off-by: Sven Schnelle Signed-off-by: Helge Deller Signed-off-by: Greg Kroah-Hartman --- drivers/parisc/sba_iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/parisc/sba_iommu.c +++ b/drivers/parisc/sba_iommu.c @@ -1270,7 +1270,7 @@ sba_ioc_init_pluto(struct parisc_device ** (one that doesn't overlap memory or LMMIO space) in the ** IBASE and IMASK registers. */ - ioc->ibase = READ_REG(ioc->ioc_hpa + IOC_IBASE); + ioc->ibase = READ_REG(ioc->ioc_hpa + IOC_IBASE) & ~0x1fffffULL; iova_space_size = ~(READ_REG(ioc->ioc_hpa + IOC_IMASK) & 0xFFFFFFFFUL) + 1; if ((ioc->ibase < 0xfed00000UL) && ((ioc->ibase + iova_space_size) > 0xfee00000UL)) {