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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E8AF1D73E8E for ; Thu, 29 Jan 2026 21:26:17 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 6799B6B00A3; Thu, 29 Jan 2026 16:26:07 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 62C826B00A4; Thu, 29 Jan 2026 16:26:07 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4D9926B00A5; Thu, 29 Jan 2026 16:26:07 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 3B07E6B00A3 for ; Thu, 29 Jan 2026 16:26:07 -0500 (EST) Received: from smtpin04.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 058588980E for ; Thu, 29 Jan 2026 21:26:07 +0000 (UTC) X-FDA: 84386284374.04.FDA713A Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) by imf26.hostedemail.com (Postfix) with ESMTP id 34488140003 for ; Thu, 29 Jan 2026 21:26:04 +0000 (UTC) Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=google.com header.s=20230601 header.b=qKGsyUVz; spf=pass (imf26.hostedemail.com: domain of 3a9B7aQgKCE4t2q91qs0w44w1u.s421y3AD-220Bqs0.47w@flex--dmatlack.bounces.google.com designates 209.85.216.73 as permitted sender) smtp.mailfrom=3a9B7aQgKCE4t2q91qs0w44w1u.s421y3AD-220Bqs0.47w@flex--dmatlack.bounces.google.com; dmarc=pass (policy=reject) header.from=google.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1769721965; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=FUlLWwYhjyjIuuZGYT6Vav103VXsQgg/WHiCQN706aw=; b=VPBh9rZtH+Ikn3hpoZCoA9h6v5lg5jcUgFfzLAZ+brLhZCR0j4PEQqA3JFtW08x2fsHqkQ 81odh+Dh437cCoimP4DjxUmGEicI+Bg+S+WcDadeabg23yShqefgXU5br6l5m/U3pFI8b8 hVcgSje86C1503EjVUt0xjlfV3gJ2RI= ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=pass header.d=google.com header.s=20230601 header.b=qKGsyUVz; spf=pass (imf26.hostedemail.com: domain of 3a9B7aQgKCE4t2q91qs0w44w1u.s421y3AD-220Bqs0.47w@flex--dmatlack.bounces.google.com designates 209.85.216.73 as permitted sender) smtp.mailfrom=3a9B7aQgKCE4t2q91qs0w44w1u.s421y3AD-220Bqs0.47w@flex--dmatlack.bounces.google.com; dmarc=pass (policy=reject) header.from=google.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1769721965; a=rsa-sha256; cv=none; b=NmjZgp5eqTftwPSoRgTgLjvHed6mw4kIfGlH9gVpXxiSBuOjrvRk5YA6yirlIcucsMGtuo 859xzH6RFgZ2/ogDa0LoMW1Az0eze5l1yho06f4w8DxJxoIGmlHYwNUCKWgBOPWXP18MhI KqXQtVLCeXzUQq5htotl2XQjqxZW77A= Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-34cc8bf226cso1383041a91.3 for ; Thu, 29 Jan 2026 13:26:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1769721964; x=1770326764; darn=kvack.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=FUlLWwYhjyjIuuZGYT6Vav103VXsQgg/WHiCQN706aw=; b=qKGsyUVzRGuyPfBQV3beSPOxh6o2jGofbBadtQfKHUKjh6yhzJvdML1jTpsJTKKY3o ojf5/tGgVL/N5SXo7cRTw4kNx9b2R6O0RNHQAHzki4Hi/Csb5sVLvB/123+S0vaOvEaJ Cgj++6wmHTE3iLaMSybCBSCOkmwBOXydpl33wTfWMo32pW/6lBN9Uz9yi+wtYUqLY46S E0dVR9oacCvSqUVUGqnYEEbTxikmX+mp5X6Uz/t3VllEAGMhC1Yok2hIjkpNLT5kQO4S ZbXyUcTMLLqGgxeUVB8AsAoo00cDwBDLXhEaKLGI0Xq9gfCmE44ZgCyWQ6VWQBabW9IY ZayA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1769721964; x=1770326764; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=FUlLWwYhjyjIuuZGYT6Vav103VXsQgg/WHiCQN706aw=; b=h6xRM/8yi4IypFIV3M0WH4umP01mNAyMM1e+m7PgORAN9QSecCiUzbvH584fjzLL4Z A/K6ZbjSq4ZFeV5zrkS0NDJgU6mnSALF9hIEFmYrbW9vcT+vf+RP/NvgJ9hpmzDrLo3X EYM0PXyBtg+iScBzXvl6ao4gJgf/LBJ82INLKPoxX4PDZ1gn5/h17LSqeCvsHsH2rkOW AhYM6tYvsfFFRt5V55Ko6pY16uq1nN6Zmp/0ZWdDaVXabX1ykZDGifCnhrRoGCENmfuy GVowiGupG0wgieq1Xb9fJ2nMEGB8wrH9c2Vi7uA38q9YzoJBfE4/PajNb8lAHM8pZwAc 5nMg== X-Forwarded-Encrypted: i=1; AJvYcCXEBeyhivRuO6vIaVvSQJspwHxfNeSfJ+XZh3OaMxQPG8mHRJAt6zcHjHrk/ZNhqFANQOkxl8Ditg==@kvack.org X-Gm-Message-State: AOJu0YymkoazlHu8UG58i9xSNC+3LFwWvoErulIYXZlilpbMT+8UTXKh YcFyavxeOjeyy1TBCteaJKRZMfHQT0RWHk2Td2UfbNKcj36pYx2L6tb7s9H+tp9JlqOs5+BC8Bl 6xpEd5EztrBb3Mg== X-Received: from pjps20.prod.google.com ([2002:a17:90a:a114:b0:352:ca2d:ce63]) (user=dmatlack job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90a:d64e:b0:341:2b78:61b8 with SMTP id 98e67ed59e1d1-3543b3d65f8mr671636a91.20.1769721963975; Thu, 29 Jan 2026 13:26:03 -0800 (PST) Date: Thu, 29 Jan 2026 21:25:03 +0000 In-Reply-To: <20260129212510.967611-1-dmatlack@google.com> Mime-Version: 1.0 References: <20260129212510.967611-1-dmatlack@google.com> X-Mailer: git-send-email 2.53.0.rc1.225.gd81095ad13-goog Message-ID: <20260129212510.967611-17-dmatlack@google.com> Subject: [PATCH v2 16/22] vfio: selftests: Add vfio_pci_liveupdate_uapi_test From: David Matlack To: Alex Williamson Cc: Adithya Jayachandran , Alexander Graf , Alex Mastro , Alistair Popple , Andrew Morton , Ankit Agrawal , Bjorn Helgaas , Chris Li , David Matlack , David Rientjes , Jacob Pan , Jason Gunthorpe , Jason Gunthorpe , Jonathan Corbet , Josh Hilke , Kevin Tian , kexec@lists.infradead.org, kvm@vger.kernel.org, Leon Romanovsky , Leon Romanovsky , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, linux-pci@vger.kernel.org, Lukas Wunner , "=?UTF-8?q?Micha=C5=82=20Winiarski?=" , Mike Rapoport , Parav Pandit , Pasha Tatashin , Pranjal Shrivastava , Pratyush Yadav , Raghavendra Rao Ananta , Rodrigo Vivi , Saeed Mahameed , Samiullah Khawaja , Shuah Khan , "=?UTF-8?q?Thomas=20Hellstr=C3=B6m?=" , Tomita Moeko , Vipin Sharma , Vivek Kasireddy , William Tu , Yi Liu , Zhu Yanjun Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: w7u4i9x1j4p4m1pjwhfhaybnb6xteptp X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 34488140003 X-HE-Tag: 1769721964-797319 X-HE-Meta: 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 vEzlxT7O 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Add a selftest to exercise preserving a various VFIO files through /dev/liveupdate. Ensure that VFIO cdev device files can be preserved and everything else (group-based device files, group files, and container files) all fail. Signed-off-by: David Matlack --- tools/testing/selftests/vfio/Makefile | 1 + .../vfio/vfio_pci_liveupdate_uapi_test.c | 93 +++++++++++++++++++ 2 files changed, 94 insertions(+) create mode 100644 tools/testing/selftests/vfio/vfio_pci_liveupdate_uapi_test.c diff --git a/tools/testing/selftests/vfio/Makefile b/tools/testing/selftests/vfio/Makefile index f9c040094d4a..666310872217 100644 --- a/tools/testing/selftests/vfio/Makefile +++ b/tools/testing/selftests/vfio/Makefile @@ -4,6 +4,7 @@ TEST_GEN_PROGS += vfio_iommufd_setup_test TEST_GEN_PROGS += vfio_pci_device_test TEST_GEN_PROGS += vfio_pci_device_init_perf_test TEST_GEN_PROGS += vfio_pci_driver_test +TEST_GEN_PROGS += vfio_pci_liveupdate_uapi_test TEST_FILES += scripts/cleanup.sh TEST_FILES += scripts/lib.sh diff --git a/tools/testing/selftests/vfio/vfio_pci_liveupdate_uapi_test.c b/tools/testing/selftests/vfio/vfio_pci_liveupdate_uapi_test.c new file mode 100644 index 000000000000..3b4276b2532c --- /dev/null +++ b/tools/testing/selftests/vfio/vfio_pci_liveupdate_uapi_test.c @@ -0,0 +1,93 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include +#include +#include + +static const char *device_bdf; + +FIXTURE(vfio_pci_liveupdate_uapi_test) { + int luo_fd; + int session_fd; + struct iommu *iommu; + struct vfio_pci_device *device; +}; + +FIXTURE_VARIANT(vfio_pci_liveupdate_uapi_test) { + const char *iommu_mode; +}; + +#define FIXTURE_VARIANT_ADD_IOMMU_MODE(_iommu_mode) \ +FIXTURE_VARIANT_ADD(vfio_pci_liveupdate_uapi_test, _iommu_mode) { \ + .iommu_mode = #_iommu_mode, \ +} + +FIXTURE_VARIANT_ADD_ALL_IOMMU_MODES(); +#undef FIXTURE_VARIANT_ADD_IOMMU_MODE + +FIXTURE_SETUP(vfio_pci_liveupdate_uapi_test) +{ + self->luo_fd = luo_open_device(); + ASSERT_GE(self->luo_fd, 0); + + self->session_fd = luo_create_session(self->luo_fd, "session"); + ASSERT_GE(self->session_fd, 0); + + self->iommu = iommu_init(variant->iommu_mode); + self->device = vfio_pci_device_init(device_bdf, self->iommu); +} + +FIXTURE_TEARDOWN(vfio_pci_liveupdate_uapi_test) +{ + vfio_pci_device_cleanup(self->device); + iommu_cleanup(self->iommu); + close(self->session_fd); + close(self->luo_fd); +} + +TEST_F(vfio_pci_liveupdate_uapi_test, preserve_device) +{ + int ret; + + ret = luo_session_preserve_fd(self->session_fd, self->device->fd, 0); + + /* Preservation should only be supported for VFIO cdev files. */ + ASSERT_EQ(ret, self->iommu->iommufd ? 0 : -ENOENT); +} + +TEST_F(vfio_pci_liveupdate_uapi_test, preserve_group_fails) +{ + int ret; + + if (self->iommu->iommufd) + return; + + ret = luo_session_preserve_fd(self->session_fd, self->device->group_fd, 0); + ASSERT_EQ(ret, -ENOENT); +} + +TEST_F(vfio_pci_liveupdate_uapi_test, preserve_container_fails) +{ + int ret; + + if (self->iommu->iommufd) + return; + + ret = luo_session_preserve_fd(self->session_fd, self->iommu->container_fd, 0); + ASSERT_EQ(ret, -ENOENT); +} + +int main(int argc, char *argv[]) +{ + int fd; + + fd = luo_open_device(); + if (fd < 0) { + printf("open(%s) failed: %s, skipping\n", LUO_DEVICE, strerror(errno)); + return KSFT_SKIP; + } + close(fd); + + device_bdf = vfio_selftests_get_bdf(&argc, argv); + return test_harness_run(argc, argv); +} -- 2.53.0.rc1.225.gd81095ad13-goog