From owner-svn-src-all@freebsd.org Tue Sep 3 14:05:50 2019 Return-Path: Delivered-To: svn-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 1E78BDBE56; Tue, 3 Sep 2019 14:05:47 +0000 (UTC) (envelope-from yuripv@freebsd.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2610:1c1:1:6074::16:84]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "freefall.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 46N7yf64Vbz4NqD; Tue, 3 Sep 2019 14:05:46 +0000 (UTC) (envelope-from yuripv@freebsd.org) Received: by freefall.freebsd.org (Postfix, from userid 1452) id 96B8F19B2E; Tue, 3 Sep 2019 14:05:46 +0000 (UTC) X-Original-To: yuripv@localmail.freebsd.org Delivered-To: yuripv@localmail.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [96.47.72.80]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client CN "mx1.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by freefall.freebsd.org (Postfix) with ESMTPS id 7DFC21F232; 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Wed, 27 Mar 2019 20:15:51 GMT (envelope-from tychon@FreeBSD.org) Message-Id: <201903272015.x2RKFpYA099347@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: tychon set sender to tychon@FreeBSD.org using -f From: Tycho Nightingale To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r345601 - head/sys/x86/iommu X-SVN-Group: head X-SVN-Commit-Author: tychon X-SVN-Commit-Paths: head/sys/x86/iommu X-SVN-Commit-Revision: 345601 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk X-Loop: FreeBSD.org Sender: owner-src-committers@freebsd.org X-Rspamd-Queue-Id: 3BD968D2F1 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.97 / 15.00]; local_wl_from(0.00)[freebsd.org]; NEURAL_HAM_MEDIUM(-0.99)[-0.992,0]; NEURAL_HAM_SHORT(-0.98)[-0.979,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; ASN(0.00)[asn:11403, ipnet:96.47.64.0/20, country:US] Status: O X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Date: Tue, 03 Sep 2019 14:05:51 -0000 X-Original-Date: Wed, 27 Mar 2019 20:15:51 +0000 (UTC) X-List-Received-Date: Tue, 03 Sep 2019 14:05:51 -0000 Author: tychon Date: Wed Mar 27 20:15:51 2019 New Revision: 345601 URL: https://svnweb.freebsd.org/changeset/base/345601 Log: Use the BUS_DMA_NOWRITE flag to expose and create the read-only VT-d IOMMU mappings. Reviewed by: kib Sponsored by: Dell EMC Isilon Differential Revision: https://reviews.freebsd.org/D19729 Modified: head/sys/x86/iommu/busdma_dmar.c Modified: head/sys/x86/iommu/busdma_dmar.c ============================================================================== --- head/sys/x86/iommu/busdma_dmar.c Wed Mar 27 19:59:36 2019 (r345600) +++ head/sys/x86/iommu/busdma_dmar.c Wed Mar 27 20:15:51 2019 (r345601) @@ -527,7 +527,8 @@ dmar_bus_dmamap_load_something1(struct bus_dma_tag_dma gas_flags |= DMAR_GM_CANSPLIT; error = dmar_gas_map(domain, &tag->common, size, offset, - DMAR_MAP_ENTRY_READ | DMAR_MAP_ENTRY_WRITE, + DMAR_MAP_ENTRY_READ | + ((flags & BUS_DMA_NOWRITE) == 0 ? DMAR_MAP_ENTRY_WRITE : 0), gas_flags, ma + idx, &entry); if (error != 0) break;