From patchwork Tue Nov 15 13:09:18 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Auger X-Patchwork-Id: 9429701 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 9081A60471 for ; Tue, 15 Nov 2016 13:11:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7C597287C3 for ; Tue, 15 Nov 2016 13:11:26 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6FE31287CB; Tue, 15 Nov 2016 13:11:26 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3C14E287C3 for ; Tue, 15 Nov 2016 13:11:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753547AbcKONLS (ORCPT ); Tue, 15 Nov 2016 08:11:18 -0500 Received: from mx1.redhat.com ([209.132.183.28]:51992 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754349AbcKONJu (ORCPT ); Tue, 15 Nov 2016 08:09:50 -0500 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 447B535A806; Tue, 15 Nov 2016 13:09:50 +0000 (UTC) Received: from localhost.redhat.com (vpn1-6-12.ams2.redhat.com [10.36.6.12]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id uAFD9Prf022488; Tue, 15 Nov 2016 08:09:46 -0500 From: Eric Auger To: eric.auger@redhat.com, eric.auger.pro@gmail.com, christoffer.dall@linaro.org, marc.zyngier@arm.com, robin.murphy@arm.com, alex.williamson@redhat.com, will.deacon@arm.com, joro@8bytes.org, tglx@linutronix.de, jason@lakedaemon.net, linux-arm-kernel@lists.infradead.org Cc: kvm@vger.kernel.org, drjones@redhat.com, linux-kernel@vger.kernel.org, pranav.sawargaonkar@gmail.com, iommu@lists.linux-foundation.org, punit.agrawal@arm.com, diana.craciun@nxp.com Subject: [RFC v3 05/10] iommu: Do not map reserved regions Date: Tue, 15 Nov 2016 13:09:18 +0000 Message-Id: <1479215363-2898-6-git-send-email-eric.auger@redhat.com> In-Reply-To: <1479215363-2898-1-git-send-email-eric.auger@redhat.com> References: <1479215363-2898-1-git-send-email-eric.auger@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Tue, 15 Nov 2016 13:09:50 +0000 (UTC) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP As we introduced IOMMU_RESV_NOMAP and IOMMU_RESV_MSI regions, let's prevent those new regions from being mapped. Signed-off-by: Eric Auger --- drivers/iommu/iommu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 6ee529f..a4530ad 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -343,6 +343,9 @@ static int iommu_group_create_direct_mappings(struct iommu_group *group, start = ALIGN(entry->start, pg_size); end = ALIGN(entry->start + entry->length, pg_size); + if (entry->prot & IOMMU_RESV_MASK) + continue; + for (addr = start; addr < end; addr += pg_size) { phys_addr_t phys_addr;