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{ "id": 2215708, "url": "http://patchwork.ozlabs.org/api/covers/2215708/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/cover/cover.1774421649.git.15fengyuan@gmail.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<cover.1774421649.git.15fengyuan@gmail.com>", "list_archive_url": null, "date": "2026-03-25T07:09:04", "name": "[v3,0/2] tests/qtest: Add Intel IOMMU bare-metal test using iommu-testdev", "submitter": { "id": 92576, "url": "http://patchwork.ozlabs.org/api/people/92576/?format=api", "name": "Fengyuan Yu", "email": "15fengyuan@gmail.com" }, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/cover/cover.1774421649.git.15fengyuan@gmail.com/mbox/", "series": [ { "id": 497387, "url": "http://patchwork.ozlabs.org/api/series/497387/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=497387", "date": "2026-03-25T07:09:04", "name": "tests/qtest: Add Intel IOMMU bare-metal test using iommu-testdev", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/497387/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/2215708/comments/", "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=GYY+yv2h;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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Tsirkin\" <mst@redhat.com>, Jason Wang <jasowang@redhat.com>,\n Yi Liu <yi.l.liu@intel.com>,\n =?utf-8?q?Cl=C3=A9ment_Mathieu--Drif?= <clement.mathieu--drif@bull.com>,\n Fabiano Rosas <farosas@suse.de>, Laurent Vivier <lvivier@redhat.com>,\n Paolo Bonzini <pbonzini@redhat.com>, Tao Tang <tangtao1634@phytium.com.cn>", "Cc": "qemu-devel@nongnu.org, Chao Liu <chao.liu.zevorn@gmail.com>,\n Fengyuan Yu <15fengyuan@gmail.com>", "Subject": "[PATCH v3 0/2] tests/qtest: Add Intel IOMMU bare-metal test using\n iommu-testdev", "Date": "Wed, 25 Mar 2026 15:09:04 +0800", "Message-Id": "<cover.1774421649.git.15fengyuan@gmail.com>", "X-Mailer": "git-send-email 2.39.5", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Received-SPF": "pass client-ip=2607:f8b0:4864:20::1035;\n envelope-from=15fengyuan@gmail.com; helo=mail-pj1-x1035.google.com", "X-Spam_score_int": "-20", "X-Spam_score": "-2.1", "X-Spam_bar": "--", "X-Spam_report": "(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001,\n RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=ham autolearn_force=no", "X-Spam_action": "no action", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "Hi,\n\nThis patch series adds a bare-metal qtest for the Intel IOMMU (VT-d) using\nthe iommu-testdev framework. The test exercises address translation paths\nwithout requiring a full guest OS boot.\n\nMotivation\n----------\n\nThe Intel IOMMU implementation in QEMU supports various translation \nmodes. Currently, comprehensive testing of these translation paths \nrequires booting a full guest OS with appropriate drivers, which is \ntime-consuming and makes regression testing difficult.\n\nThis new test fills that gap by using iommu-testdev to trigger DMA\ntransactions and validate the IOMMU's translation logic directly.\n\nTest Coverage\n-------------\n\nThe new test provides:\n- Legacy pass-through mode (identity mapping)\n- Legacy translated mode with 4-level second-level page table walks\n- Scalable pass-through mode (PGTT=100b)\n- Scalable second-level translation mode (PGTT=010b)\n- Scalable first-level translation mode (PGTT=001b)\n- Root/Context Entry, PASID Directory/Table Entry configuration\n- Complete 48-bit address space translation\n- End-to-end DMA verification with memory validation\n\nTesting\n-------\n\nQTEST_QEMU_BINARY=./build/qemu-system-x86_64 \\\n ./build/tests/qtest/iommu-intel-test --tap -k\n\nChanges v1 -> v2\n----------------\n- Rebase onto latest upstream to resolve compilation errors\n- Add scalable translation mode tests (SLT, FLT, PassThrough)\n- Add spec-aligned register field comments for improved readability\n\nChanges v2 -> v3\n----------------\n- Fix MAINTAINERS: move qos-intel-iommu* to \"QTest IOMMU helpers\" \n section, move iommu-intel-test.c entry to patch 2/2, remove\n duplicate entries from x86 general section\n- Remove duplicate Q35_IOMMU_BASE macro, use existing\n Q35_HOST_BRIDGE_IOMMU_ADDR instead\n- Drop unused QVTD_TM_SCALABLE_NESTED enum value\n- Fix parameter alignment in function declarations\n- Clarify qvtd_build_dma_attrs() comment: PASID=0 is reached via\n VT-d's no-PASID fallback, not via DMA attributes\n\nThanks,\nFengyuan\n\nFengyuan Yu (2):\n tests/qtest/libqos: Add Intel IOMMU helper library\n tests/qtest: Add Intel IOMMU bare-metal test\n\n MAINTAINERS | 2 +\n tests/qtest/iommu-intel-test.c | 216 +++++++++++++\n tests/qtest/libqos/meson.build | 3 +\n tests/qtest/libqos/qos-intel-iommu.c | 454 +++++++++++++++++++++++++++\n tests/qtest/libqos/qos-intel-iommu.h | 185 +++++++++++\n tests/qtest/meson.build | 2 +\n 6 files changed, 862 insertions(+)\n create mode 100644 tests/qtest/iommu-intel-test.c\n create mode 100644 tests/qtest/libqos/qos-intel-iommu.c\n create mode 100644 tests/qtest/libqos/qos-intel-iommu.h" }