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=-5.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 A412FC17441 for ; Mon, 11 Nov 2019 15:06:41 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7EF312084F for ; Mon, 11 Nov 2019 15:06:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7EF312084F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 63404CD5; Mon, 11 Nov 2019 15:06:41 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id AD524CBF for ; Mon, 11 Nov 2019 15:06:40 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from theia.8bytes.org (8bytes.org [81.169.241.247]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 460348D9 for ; Mon, 11 Nov 2019 15:06:40 +0000 (UTC) Received: by theia.8bytes.org (Postfix, from userid 1000) id 872C61E6; Mon, 11 Nov 2019 16:06:32 +0100 (CET) Date: Mon, 11 Nov 2019 16:06:31 +0100 From: Joerg Roedel To: Yian Chen Subject: Re: [PATCH v2] iommu/vt-d: Check VT-d RMRR region in BIOS is reported as reserved Message-ID: <20191111150630.GF18333@8bytes.org> References: <20191017113919.25424-1-yian.chen@intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20191017113919.25424-1-yian.chen@intel.com> User-Agent: Mutt/1.10.1 (2018-07-13) Cc: Ravi Shankar , Tony Luck , linux-ia64@vger.kernel.org, Ashok Raj , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, David Woodhouse X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org On Thu, Oct 17, 2019 at 04:39:19AM -0700, Yian Chen wrote: > VT-d RMRR (Reserved Memory Region Reporting) regions are reserved > for device use only and should not be part of allocable memory pool of OS. > > BIOS e820_table reports complete memory map to OS, including OS usable > memory ranges and BIOS reserved memory ranges etc. > > x86 BIOS may not be trusted to include RMRR regions as reserved type > of memory in its e820 memory map, hence validate every RMRR entry > with the e820 memory map to make sure the RMRR regions will not be > used by OS for any other purposes. > > ia64 EFI is working fine so implement RMRR validation as a dummy function > > Reviewed-by: Lu Baolu > Reviewed-by: Sohil Mehta > Signed-off-by: Yian Chen > --- > v2: > - return -EINVAL instead of -EFAULT when there is an error > --- > arch/ia64/include/asm/iommu.h | 5 +++++ > arch/x86/include/asm/iommu.h | 18 ++++++++++++++++++ > drivers/iommu/intel-iommu.c | 8 +++++++- > 3 files changed, 30 insertions(+), 1 deletion(-) Applied, thanks. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu